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Reserve for Unpaid Losses and Loss Adjustment Expenses - Historical Loss Development Triangles, P&C (Details) claim in Millions, $ in Millions | Dec. 31, 2022 USD ($) claim | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
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Workers’ compensation | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 17,911 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 9,516 |  |  |  |  |  |  |  |  |
Workers’ compensation | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,809 | $ 1,811 | $ 1,831 | $ 1,850 | $ 1,861 | $ 1,861 | $ 1,883 | $ 1,920 | $ 1,981 | $ 2,020
IBNR Reserves | $ 337 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 151,592 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,382 | 1,361 | 1,339 | 1,304 | 1,260 | 1,175 | 1,071 | 917 | 675 | 304
Workers’ compensation | 2014 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,637 | 1,654 | 1,679 | 1,692 | 1,713 | 1,761 | 1,789 | 1,838 | 1,869 |
IBNR Reserves | $ 353 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 126,371 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,191 | 1,167 | 1,137 | 1,099 | 1,041 | 960 | 811 | 598 | 275 |
Workers’ compensation | 2015 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,645 | 1,667 | 1,699 | 1,714 | 1,724 | 1,801 | 1,835 | 1,873 |  |
IBNR Reserves | $ 376 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 114,224 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,151 | 1,117 | 1,068 | 1,004 | 909 | 778 | 576 | 261 |  |
Workers’ compensation | 2016 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,670 | 1,708 | 1,748 | 1,767 | 1,780 | 1,772 | 1,772 |  |  |
IBNR Reserves | $ 419 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 112,486 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,110 | 1,064 | 1,003 | 908 | 779 | 579 | 255 |  |  |
Workers’ compensation | 2017 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,665 | 1,757 | 1,822 | 1,840 | 1,869 | 1,862 |  |  |  |
IBNR Reserves | $ 504 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 112,070 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,035 | 977 | 900 | 778 | 575 | 261 |  |  |  |
Workers’ compensation | 2018 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,870 | 1,904 | 1,915 | 1,917 | 1,916 |  |  |  |  |
IBNR Reserves | $ 608 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 119,284 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,090 | 983 | 837 | 624 | 283 |  |  |  |  |
Workers’ compensation | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,934 | 1,934 | 1,935 | 1,937 |  |  |  |  |  |
IBNR Reserves | $ 722 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 120,104 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,007 | 856 | 637 | 291 |  |  |  |  |  |
Workers’ compensation | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,849 | 1,864 | 1,865 |  |  |  |  |  |  |
IBNR Reserves | $ 937 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 91,187 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 695 | 507 | 223 |  |  |  |  |  |  |
Workers’ compensation | Short-Duration Insurance Contract, Accident Year 2021 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,832 | 1,831 |  |  |  |  |  |  |  |
IBNR Reserves | $ 1,012 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 100,954 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 562 | 254 |  |  |  |  |  |  |  |
Workers’ compensation | Short-Duration Insurance Contract, Accident Year 2022 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 2,000 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 1,414 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 105,013 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 293 |  |  |  |  |  |  |  |  |
General liability | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 7,509 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 3,486 |  |  |  |  |  |  |  |  |
General liability | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 503 | 500 | 508 | 505 | 502 | 488 | 484 | 456 | 442 | 455
IBNR Reserves | $ 36 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 15,217 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 457 | 442 | 422 | 398 | 372 | 320 | 233 | 141 | 53 | 13
General liability | 2014 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 510 | 505 | 515 | 522 | 513 | 494 | 481 | 475 | 506 |
IBNR Reserves | $ 50 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 16,445 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 437 | 423 | 402 | 358 | 304 | 214 | 130 | 42 | 15 |
General liability | 2015 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 647 | 637 | 647 | 633 | 594 | 554 | 560 | 556 |  |
IBNR Reserves | $ 67 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 16,621 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 547 | 524 | 477 | 409 | 278 | 156 | 55 | 10 |  |
General liability | 2016 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 636 | 620 | 632 | 632 | 607 | 583 | 613 |  |  |
IBNR Reserves | $ 58 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 17,666 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 513 | 446 | 368 | 283 | 131 | 52 | 12 |  |  |
General liability | 2017 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 615 | 613 | 615 | 613 | 614 | 626 |  |  |  |
IBNR Reserves | $ 105 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 17,168 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 441 | 344 | 255 | 156 | 67 | 15 |  |  |  |
General liability | 2018 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 728 | 703 | 697 | 669 | 692 |  |  |  |  |
IBNR Reserves | $ 212 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 18,502 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 409 | 288 | 177 | 83 | 21 |  |  |  |  |
General liability | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 840 | 822 | 827 | 822 |  |  |  |  |  |
IBNR Reserves | $ 379 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 17,914 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 339 | 192 | 100 | 29 |  |  |  |  |  |
General liability | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 923 | 923 | 938 |  |  |  |  |  |  |
IBNR Reserves | $ 625 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 13,204 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 202 | 110 | 45 |  |  |  |  |  |  |
General liability | Short-Duration Insurance Contract, Accident Year 2021 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 991 | 1,002 |  |  |  |  |  |  |  |
IBNR Reserves | $ 804 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 10,791 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 115 | 34 |  |  |  |  |  |  |  |
General liability | Short-Duration Insurance Contract, Accident Year 2022 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,116 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 1,045 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 8,186 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 26 |  |  |  |  |  |  |  |  |
Marine [Member] | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,476 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,192 |  |  |  |  |  |  |  |  |
Marine [Member] | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 137 | 137 | 138 | 136 | 133 | 138 | 134 | 133 | 151 | 147
IBNR Reserves | $ (2) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 7,362 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 133 | 132 | 131 | 124 | 119 | 117 | 110 | 99 | 81 | 41
Marine [Member] | 2014 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 167 | 168 | 164 | 166 | 161 | 162 | 155 | 158 | 162 |
IBNR Reserves | $ 3 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 7,493 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 162 | 159 | 157 | 154 | 149 | 129 | 115 | 80 | 40 |
Marine [Member] | 2015 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 140 | 137 | 136 | 131 | 146 | 144 | 144 | 157 |  |
IBNR Reserves | $ 1 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 10,353 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 140 | 139 | 138 | 132 | 124 | 114 | 84 | 39 |  |
Marine [Member] | 2016 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 146 | 144 | 147 | 145 | 136 | 141 | 138 |  |  |
IBNR Reserves | $ (15) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 13,592 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 141 | 138 | 130 | 120 | 104 | 79 | 35 |  |  |
Marine [Member] | 2017 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 180 | 177 | 171 | 172 | 185 | 159 |  |  |  |
IBNR Reserves | $ (5) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 16,109 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 172 | 160 | 151 | 140 | 109 | 47 |  |  |  |
Marine [Member] | 2018 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 165 | 159 | 152 | 159 | 143 |  |  |  |  |
IBNR Reserves | $ (16) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 14,165 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 154 | 146 | 137 | 103 | 36 |  |  |  |  |
Marine [Member] | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 134 | 139 | 141 | 143 |  |  |  |  |  |
IBNR Reserves | $ 3 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 8,562 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 110 | 100 | 82 | 35 |  |  |  |  |  |
Marine [Member] | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 137 | 141 | 149 |  |  |  |  |  |  |
IBNR Reserves | $ 12 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 5,019 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 90 | 68 | 31 |  |  |  |  |  |  |
Marine [Member] | Short-Duration Insurance Contract, Accident Year 2021 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 128 | 129 |  |  |  |  |  |  |  |
IBNR Reserves | $ 40 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 4,847 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 63 | 25 |  |  |  |  |  |  |  |
Marine [Member] | Short-Duration Insurance Contract, Accident Year 2022 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 142 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 83 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 3,549 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 27 |  |  |  |  |  |  |  |  |
Package business | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 7,218 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 5,288 |  |  |  |  |  |  |  |  |
Package business | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 582 | 583 | 587 | 586 | 592 | 586 | 585 | 573 | 565 | 579
IBNR Reserves | $ 20 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 43,716 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 556 | 552 | 549 | 541 | 522 | 504 | 467 | 414 | 339 | 225
Package business | 2014 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 576 | 581 | 593 | 603 | 603 | 602 | 601 | 578 | 566 |
IBNR Reserves | $ 24 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 43,483 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 545 | 542 | 535 | 525 | 507 | 468 | 416 | 345 | 226 |
Package business | 2015 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 564 | 567 | 581 | 588 | 583 | 585 | 588 | 582 |  |
IBNR Reserves | $ 22 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 42,330 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 530 | 513 | 505 | 486 | 445 | 383 | 332 | 212 |  |
Package business | 2016 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 591 | 595 | 611 | 625 | 632 | 638 | 655 |  |  |
IBNR Reserves | $ 36 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 44,224 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 540 | 521 | 500 | 465 | 410 | 353 | 225 |  |  |
Package business | 2017 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 637 | 644 | 657 | 692 | 702 | 695 |  |  |  |
IBNR Reserves | $ 48 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 46,771 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 561 | 534 | 496 | 447 | 372 | 235 |  |  |  |
Package business | 2018 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 655 | 667 | 688 | 724 | 719 |  |  |  |  |
IBNR Reserves | $ 78 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 45,088 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 537 | 498 | 451 | 402 | 237 |  |  |  |  |
Package business | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 744 | 749 | 769 | 813 |  |  |  |  |  |
IBNR Reserves | $ 116 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 43,573 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 571 | 488 | 413 | 254 |  |  |  |  |  |
Package business | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 877 | 893 | 915 |  |  |  |  |  |  |
IBNR Reserves | $ 245 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 62,208 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 573 | 493 | 326 |  |  |  |  |  |  |
Package business | Short-Duration Insurance Contract, Accident Year 2021 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 954 | 946 |  |  |  |  |  |  |  |
IBNR Reserves | $ 309 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 46,012 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 556 | 368 |  |  |  |  |  |  |  |
Package business | Short-Duration Insurance Contract, Accident Year 2022 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,038 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 532 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 37,966 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 319 |  |  |  |  |  |  |  |  |
Property | P&C Commercial Lines | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 3,922 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 3,383 |  |  |  |  |  |  |  |  |
Property | P&C Commercial Lines | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 247 | 247 | 247 | 247 | 247 | 249 | 252 | 254 | 252 | 267
IBNR Reserves | $ 0 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 21,690 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 244 | 244 | 245 | 245 | 244 | 242 | 243 | 238 | 223 | 161
Property | P&C Commercial Lines | 2014 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 279 | 279 | 280 | 280 | 279 | 279 | 282 | 281 | 293 |
IBNR Reserves | $ (1) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 21,119 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 280 | 280 | 279 | 279 | 279 | 279 | 270 | 250 | 170 |
Property | P&C Commercial Lines | 2015 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 301 | 301 | 303 | 305 | 301 | 302 | 301 | 298 |  |
IBNR Reserves | $ 1 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 21,143 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 301 | 301 | 303 | 301 | 295 | 284 | 257 | 178 |  |
Property | P&C Commercial Lines | 2016 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 404 | 407 | 407 | 405 | 398 | 418 | 405 |  |  |
IBNR Reserves | $ 0 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 24,085 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 405 | 405 | 400 | 394 | 377 | 341 | 214 |  |  |
Property | P&C Commercial Lines | 2017 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 437 | 440 | 438 | 455 | 515 | 576 |  |  |  |
IBNR Reserves | $ 2 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 24,719 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 438 | 432 | 426 | 411 | 377 | 228 |  |  |  |
Property | P&C Commercial Lines | 2018 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 400 | 403 | 423 | 436 | 450 |  |  |  |  |
IBNR Reserves | $ 4 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 21,907 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 393 | 385 | 378 | 344 | 187 |  |  |  |  |
Property | P&C Commercial Lines | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 420 | 418 | 439 | 480 |  |  |  |  |  |
IBNR Reserves | $ (3) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 21,098 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 405 | 383 | 351 | 215 |  |  |  |  |  |
Property | P&C Commercial Lines | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 439 | 468 | 501 |  |  |  |  |  |  |
IBNR Reserves | $ 64 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 20,511 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 355 | 336 | 221 |  |  |  |  |  |  |
Property | P&C Commercial Lines | Short-Duration Insurance Contract, Accident Year 2021 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 499 | 530 |  |  |  |  |  |  |  |
IBNR Reserves | $ 74 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 18,188 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 382 | 241 |  |  |  |  |  |  |  |
Property | P&C Commercial Lines | Short-Duration Insurance Contract, Accident Year 2022 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 496 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 183 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 15,326 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 180 |  |  |  |  |  |  |  |  |
Automobile liability | P&C Commercial Lines | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 4,025 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 2,824 |  |  |  |  |  |  |  |  |
Automobile liability | P&C Commercial Lines | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 332 | 333 | 334 | 336 | 339 | 340 | 341 | 334 | 318 | 311
IBNR Reserves | $ 5 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 34,172 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 326 | 324 | 323 | 320 | 311 | 295 | 259 | 202 | 130 | 62
Automobile liability | P&C Commercial Lines | 2014 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 332 | 332 | 333 | 334 | 341 | 337 | 331 | 317 | 309 |
IBNR Reserves | $ 5 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 30,096 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 325 | 320 | 318 | 309 | 299 | 252 | 197 | 131 | 59 |
Automobile liability | P&C Commercial Lines | 2015 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 358 | 360 | 359 | 356 | 356 | 372 | 358 | 308 |  |
IBNR Reserves | $ 7 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 28,587 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 348 | 344 | 335 | 314 | 267 | 207 | 142 | 62 |  |
Automobile liability | P&C Commercial Lines | 2016 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 395 | 395 | 391 | 391 | 390 | 393 | 385 |  |  |
IBNR Reserves | $ 7 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 29,201 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 379 | 357 | 339 | 303 | 232 | 147 | 65 |  |  |
Automobile liability | P&C Commercial Lines | 2017 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 394 | 381 | 383 | 379 | 383 | 372 |  |  |  |
IBNR Reserves | $ 4 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 26,384 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 368 | 328 | 285 | 211 | 134 | 60 |  |  |  |
Automobile liability | P&C Commercial Lines | 2018 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 424 | 406 | 405 | 396 | 349 |  |  |  |  |
IBNR Reserves | $ 27 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 24,733 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 360 | 305 | 238 | 153 | 62 |  |  |  |  |
Automobile liability | P&C Commercial Lines | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 460 | 450 | 439 | 425 |  |  |  |  |  |
IBNR Reserves | $ 61 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 28,473 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 327 | 247 | 160 | 67 |  |  |  |  |  |
Automobile liability | P&C Commercial Lines | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 419 | 424 | 428 |  |  |  |  |  |  |
IBNR Reserves | $ 149 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 21,963 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 200 | 119 | 55 |  |  |  |  |  |  |
Automobile liability | P&C Commercial Lines | Short-Duration Insurance Contract, Accident Year 2021 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 443 | 440 |  |  |  |  |  |  |  |
IBNR Reserves | $ 252 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 19,623 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 127 | 55 |  |  |  |  |  |  |  |
Automobile liability | P&C Commercial Lines | Short-Duration Insurance Contract, Accident Year 2022 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 468 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 341 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 17,849 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 64 |  |  |  |  |  |  |  |  |
Automobile liability | P&C Personal Lines | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 10,887 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 9,584 |  |  |  |  |  |  |  |  |
Automobile liability | P&C Personal Lines | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,155 | 1,155 | 1,156 | 1,157 | 1,153 | 1,152 | 1,153 | 1,144 | 1,145 | 1,131
IBNR Reserves | $ 5 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 205,487 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,149 | 1,148 | 1,144 | 1,142 | 1,135 | 1,121 | 1,091 | 1,002 | 816 | 442
Automobile liability | P&C Personal Lines | 2014 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,199 | 1,199 | 1,201 | 1,202 | 1,199 | 1,200 | 1,198 | 1,153 | 1,146 |
IBNR Reserves | $ 5 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 209,024 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,192 | 1,190 | 1,186 | 1,182 | 1,165 | 1,125 | 1,032 | 843 | 430 |
Automobile liability | P&C Personal Lines | 2015 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,320 | 1,324 | 1,328 | 1,331 | 1,330 | 1,338 | 1,340 | 1,195 |  |
IBNR Reserves | $ 3 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 216,901 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,313 | 1,310 | 1,304 | 1,292 | 1,243 | 1,142 | 935 | 475 |  |
Automobile liability | P&C Personal Lines | 2016 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,384 | 1,386 | 1,395 | 1,397 | 1,393 | 1,402 | 1,407 |  |  |
IBNR Reserves | $ 5 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 215,855 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,373 | 1,363 | 1,345 | 1,308 | 1,188 | 968 | 505 |  |  |
Automobile liability | P&C Personal Lines | 2017 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,198 | 1,200 | 1,214 | 1,228 | 1,275 | 1,277 |  |  |  |
IBNR Reserves | $ 9 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 187,545 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,180 | 1,161 | 1,123 | 1,033 | 836 | 441 |  |  |  |
Automobile liability | P&C Personal Lines | 2018 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,056 | 1,058 | 1,072 | 1,104 | 1,108 |  |  |  |  |
IBNR Reserves | $ 28 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 156,258 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,011 | 965 | 888 | 710 | 359 |  |  |  |  |
Automobile liability | P&C Personal Lines | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 986 | 991 | 1,010 | 1,018 |  |  |  |  |  |
IBNR Reserves | $ 52 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 139,641 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 897 | 816 | 654 | 323 |  |  |  |  |  |
Automobile liability | P&C Personal Lines | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 775 | 782 | 805 |  |  |  |  |  |  |
IBNR Reserves | $ 106 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 96,438 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 615 | 486 | 238 |  |  |  |  |  |  |
Automobile liability | P&C Personal Lines | Short-Duration Insurance Contract, Accident Year 2021 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 886 | 881 |  |  |  |  |  |  |  |
IBNR Reserves | $ 224 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 100,945 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 553 | 247 |  |  |  |  |  |  |  |
Automobile liability | P&C Personal Lines | Short-Duration Insurance Contract, Accident Year 2022 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 928 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 423 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 99,686 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 301 |  |  |  |  |  |  |  |  |
Commercial automobile physical damage | P&C Commercial Lines | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 181 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 169 |  |  |  |  |  |  |  |  |
Commercial automobile physical damage | P&C Commercial Lines | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 50 | 51 | 51 |  |  |  |  |  |  |
IBNR Reserves | $ 1 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 14,727 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 49 | 50 | 45 |  |  |  |  |  |  |
Commercial automobile physical damage | P&C Commercial Lines | Short-Duration Insurance Contract, Accident Year 2021 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 62 | 58 |  |  |  |  |  |  |  |
IBNR Reserves | $ 1 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 15,436 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 61 | 51 |  |  |  |  |  |  |  |
Commercial automobile physical damage | P&C Commercial Lines | Short-Duration Insurance Contract, Accident Year 2022 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 69 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 4 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 15,100 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 59 |  |  |  |  |  |  |  |  |
Professional liability | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 2,609 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,403 |  |  |  |  |  |  |  |  |
Professional liability | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 165 | 168 | 170 | 171 | 173 | 173 | 174 | 186 | 195 | 207
IBNR Reserves | $ 11 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 5,983 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 148 | 147 | 142 | 137 | 131 | 116 | 87 | 67 | 44 | 10
Professional liability | 2014 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 168 | 172 | 181 | 181 | 178 | 177 | 181 | 183 | 187 |
IBNR Reserves | $ 9 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 6,740 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 150 | 145 | 146 | 134 | 130 | 107 | 74 | 38 | 7 |
Professional liability | 2015 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 195 | 198 | 205 | 212 | 189 | 179 | 174 | 164 |  |
IBNR Reserves | $ (3) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 7,254 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 174 | 163 | 140 | 124 | 107 | 85 | 40 | 9 |  |
Professional liability | 2016 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 192 | 194 | 193 | 195 | 202 | 176 | 183 |  |  |
IBNR Reserves | $ 13 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 8,421 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 165 | 146 | 123 | 110 | 88 | 50 | 8 |  |  |
Professional liability | 2017 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 242 | 238 | 224 | 230 | 202 | 205 |  |  |  |
IBNR Reserves | $ 37 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 9,527 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 179 | 150 | 122 | 87 | 48 | 11 |  |  |  |
Professional liability | 2018 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 269 | 274 | 274 | 278 | 247 |  |  |  |  |
IBNR Reserves | $ 24 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 10,138 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 197 | 163 | 128 | 72 | 15 |  |  |  |  |
Professional liability | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 350 | 333 | 315 | 297 |  |  |  |  |  |
IBNR Reserves | $ 115 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 9,809 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 199 | 148 | 77 | 21 |  |  |  |  |  |
Professional liability | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 337 | 364 | 369 |  |  |  |  |  |  |
IBNR Reserves | $ 185 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 7,945 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 118 | 71 | 19 |  |  |  |  |  |  |
Professional liability | Short-Duration Insurance Contract, Accident Year 2021 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 343 | 339 |  |  |  |  |  |  |  |
IBNR Reserves | $ 262 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 6,728 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 55 | 15 |  |  |  |  |  |  |  |
Professional liability | Short-Duration Insurance Contract, Accident Year 2022 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 348 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 306 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 5,896 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 18 |  |  |  |  |  |  |  |  |
Bond | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 635 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 260 |  |  |  |  |  |  |  |  |
Bond | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 29 | 34 | 34 | 35 | 39 | 49 | 48 | 55 | 58 | 64
IBNR Reserves | $ 9 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,470 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 20 | 20 | 20 | 20 | 19 | 19 | 19 | 17 | 9 | 3
Bond | 2014 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 64 | 60 | 60 | 59 | 59 | 67 | 66 | 67 | 71 |
IBNR Reserves | $ 12 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,389 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 52 | 47 | 46 | 44 | 43 | 43 | 40 | 31 | 18 |
Bond | 2015 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 42 | 47 | 48 | 54 | 60 | 63 | 67 | 67 |  |
IBNR Reserves | $ 17 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,404 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 25 | 30 | 32 | 34 | 31 | 24 | 20 | 9 |  |
Bond | 2016 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 37 | 45 | 51 | 55 | 61 | 61 | 61 |  |  |
IBNR Reserves | $ 16 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,341 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 22 | 22 | 22 | 20 | 15 | 12 | 2 |  |  |
Bond | 2017 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 70 | 79 | 94 | 101 | 90 | 63 |  |  |  |
IBNR Reserves | $ 26 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,775 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 43 | 42 | 54 | 55 | 46 | 5 |  |  |  |
Bond | 2018 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 70 | 71 | 72 | 68 | 68 |  |  |  |  |
IBNR Reserves | $ 40 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,714 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 29 | 24 | 23 | 16 | 6 |  |  |  |  |
Bond | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 73 | 74 | 73 | 72 |  |  |  |  |  |
IBNR Reserves | $ 57 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,860 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 16 | 15 | 13 | 3 |  |  |  |  |  |
Bond | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 79 | 84 | 83 |  |  |  |  |  |  |
IBNR Reserves | $ 54 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 2,101 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 21 | 12 | 4 |  |  |  |  |  |  |
Bond | Short-Duration Insurance Contract, Accident Year 2021 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 85 | 85 |  |  |  |  |  |  |  |
IBNR Reserves | $ 67 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 2,561 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 21 | 8 |  |  |  |  |  |  |  |
Bond | Short-Duration Insurance Contract, Accident Year 2022 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 86 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 73 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,991 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 11 |  |  |  |  |  |  |  |  |
Assumed Reinsurance [Member] | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,541 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,133 |  |  |  |  |  |  |  |  |
Assumed Reinsurance [Member] | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 103 | 103 | 103 | 103 | 102 | 102 | 105 | 102 | 119 | 115
IBNR Reserves | $ 0 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,668 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 103 | 103 | 102 | 102 | 101 | 100 | 98 | 91 | 83 | 53
Assumed Reinsurance [Member] | 2014 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 115 | 115 | 116 | 116 | 115 | 118 | 121 | 142 | 119 |
IBNR Reserves | $ (1) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,814 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 115 | 115 | 114 | 113 | 112 | 109 | 106 | 119 | 66 |
Assumed Reinsurance [Member] | 2015 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 95 | 95 | 96 | 95 | 94 | 94 | 91 | 102 |  |
IBNR Reserves | $ 0 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,585 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 95 | 94 | 93 | 91 | 83 | 77 | 64 | 42 |  |
Assumed Reinsurance [Member] | 2016 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 102 | 101 | 101 | 100 | 98 | 90 | 88 |  |  |
IBNR Reserves | $ (5) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,766 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 98 | 97 | 95 | 90 | 84 | 66 | 36 |  |  |
Assumed Reinsurance [Member] | 2017 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 155 | 152 | 156 | 161 | 153 | 129 |  |  |  |
IBNR Reserves | $ (2) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 2,213 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 149 | 147 | 144 | 135 | 116 | 44 |  |  |  |
Assumed Reinsurance [Member] | 2018 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 135 | 133 | 128 | 126 | 128 |  |  |  |  |
IBNR Reserves | $ (14) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 2,412 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 141 | 138 | 132 | 111 | 25 |  |  |  |  |
Assumed Reinsurance [Member] | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 189 | 185 | 188 | 181 |  |  |  |  |  |
IBNR Reserves | $ 19 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 2,804 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 158 | 152 | 131 | 62 |  |  |  |  |  |
Assumed Reinsurance [Member] | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 186 | 180 | 183 |  |  |  |  |  |  |
IBNR Reserves | $ 55 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 2,157 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 113 | 89 | 49 |  |  |  |  |  |  |
Assumed Reinsurance [Member] | Short-Duration Insurance Contract, Accident Year 2021 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 195 | 191 |  |  |  |  |  |  |  |
IBNR Reserves | $ 49 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,484 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 101 | 46 |  |  |  |  |  |  |  |
Assumed Reinsurance [Member] | Short-Duration Insurance Contract, Accident Year 2022 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 266 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 154 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 712 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 60 |  |  |  |  |  |  |  |  |
Personal automobile physical damage | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,288 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,250 |  |  |  |  |  |  |  |  |
Personal automobile physical damage | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 342 | 346 | 349 |  |  |  |  |  |  |
IBNR Reserves | $ 1 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 211,066 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 341 | 341 | 333 |  |  |  |  |  |  |
Personal automobile physical damage | Short-Duration Insurance Contract, Accident Year 2021 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 413 | 412 |  |  |  |  |  |  |  |
IBNR Reserves | $ 2 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 225,425 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 411 | 388 |  |  |  |  |  |  |  |
Personal automobile physical damage | Short-Duration Insurance Contract, Accident Year 2022 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 533 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ (5) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 224,117 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 498 |  |  |  |  |  |  |  |  |
Homeowners | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 6,063 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 5,728 |  |  |  |  |  |  |  |  |
Homeowners | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 629 | 629 | 630 | 629 | 630 | 632 | 634 | 637 | 638 | 673
IBNR Reserves | $ 1 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 113,556 |  |  |  |  |  |  |  |  |
Homeowners | 2014 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 698 | 698 | 698 | 698 | 698 | 700 | 702 | 707 | 710 |
IBNR Reserves | $ 0 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 121,927 |  |  |  |  |  |  |  |  |
Homeowners | 2015 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 684 | 684 | 684 | 684 | 684 | 690 | 703 | 690 |  |
IBNR Reserves | $ 1 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 120,010 |  |  |  |  |  |  |  |  |
Homeowners | 2016 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 658 | 658 | 658 | 658 | 663 | 673 | 669 |  |  |
IBNR Reserves | $ 1 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 119,810 |  |  |  |  |  |  |  |  |
Homeowners | 2017 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 774 | 775 | 783 | 884 | 889 | 866 |  |  |  |
IBNR Reserves | $ 7 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 124,761 |  |  |  |  |  |  |  |  |
Homeowners | 2018 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 639 | 642 | 673 | 910 | 903 |  |  |  |  |
IBNR Reserves | $ (1) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 102,870 |  |  |  |  |  |  |  |  |
Homeowners | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 468 | 470 | 475 | 501 |  |  |  |  |  |
IBNR Reserves | $ 6 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 84,721 |  |  |  |  |  |  |  |  |
Homeowners | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 513 | 512 | 525 |  |  |  |  |  |  |
IBNR Reserves | $ 20 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 88,347 |  |  |  |  |  |  |  |  |
Homeowners | Short-Duration Insurance Contract, Accident Year 2021 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 501 | 502 |  |  |  |  |  |  |  |
IBNR Reserves | $ 28 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 76,720 |  |  |  |  |  |  |  |  |
Homeowners | Short-Duration Insurance Contract, Accident Year 2022 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 499 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 113 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 57,936 |  |  |  |  |  |  |  |  |
Homeowners | P&C Personal Lines | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 5,728 |  |  |  |  |  |  |  |  |
Homeowners | P&C Personal Lines | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 629 | 628 | 628 | 628 | 627 | 626 | 622 | 611 | 590 | $ 467
Homeowners | P&C Personal Lines | 2014 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 698 | 698 | 697 | 697 | 695 | 691 | 684 | 663 | $ 526 |
Homeowners | P&C Personal Lines | 2015 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 682 | 681 | 681 | 680 | 674 | 665 | 645 | $ 487 |  |
Homeowners | P&C Personal Lines | 2016 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 656 | 655 | 653 | 649 | 640 | 621 | $ 481 |  |  |
Homeowners | P&C Personal Lines | 2017 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 762 | 761 | 757 | 795 | 747 | $ 538 |  |  |  |
Homeowners | P&C Personal Lines | 2018 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 627 | 619 | 616 | 712 | $ 484 |  |  |  |  |
Homeowners | P&C Personal Lines | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 458 | 445 | 425 | $ 318 |  |  |  |  |  |
Homeowners | P&C Personal Lines | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 478 | 454 | $ 335 |  |  |  |  |  |  |
Homeowners | P&C Personal Lines | Short-Duration Insurance Contract, Accident Year 2021 [Member] |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 440 | $ 305 |  |  |  |  |  |  |  |
Homeowners | P&C Personal Lines | Short-Duration Insurance Contract, Accident Year 2022 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 298 |  |  |  |  |  |  |  |  |

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