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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, 2021 USD ($) claim | Dec. 31, 2020 USD ($) | 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 ($) | Dec. 31, 2012 USD ($)
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Workers’ compensation | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 18,263 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 9,992 |  |  |  |  |  |  |  |  |
Workers’ compensation | 2012 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 2,133 | $ 2,135 | $ 2,146 | $ 2,154 | $ 2,169 | $ 2,168 | $ 2,181 | $ 2,207 | $ 2,207 | $ 2,185
IBNR Reserves | $ 310 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 171,562 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,706 | 1,678 | 1,644 | 1,587 | 1,529 | 1,436 | 1,313 | 1,106 | 809 | 359
Workers’ compensation | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,811 | 1,831 | 1,850 | 1,861 | 1,861 | 1,883 | 1,920 | 1,981 | 2,020 |
IBNR Reserves | $ 346 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 151,492 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 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 | 1,654 | 1,679 | 1,692 | 1,713 | 1,761 | 1,789 | 1,838 | 1,869 |  |
IBNR Reserves | $ 386 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 126,288 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 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 | 1,667 | 1,699 | 1,714 | 1,724 | 1,801 | 1,835 | 1,873 |  |  |
IBNR Reserves | $ 412 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 114,113 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 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 | 1,708 | 1,748 | 1,767 | 1,780 | 1,772 | 1,772 |  |  |  |
IBNR Reserves | $ 489 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 112,302 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,064 | 1,003 | 908 | 779 | 579 | 255 |  |  |  |
Workers’ compensation | 2017 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,757 | 1,822 | 1,840 | 1,869 | 1,862 |  |  |  |  |
IBNR Reserves | $ 636 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 111,800 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 977 | 900 | 778 | 575 | 261 |  |  |  |  |
Workers’ compensation | 2018 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,904 | 1,915 | 1,917 | 1,916 |  |  |  |  |  |
IBNR Reserves | $ 726 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 118,951 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 983 | 837 | 624 | 283 |  |  |  |  |  |
Workers’ compensation | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,934 | 1,935 | 1,937 |  |  |  |  |  |  |
IBNR Reserves | $ 844 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 119,416 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 856 | 637 | 291 |  |  |  |  |  |  |
Workers’ compensation | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,864 | 1,865 |  |  |  |  |  |  |  |
IBNR Reserves | $ 1,114 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 90,199 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 507 | 223 |  |  |  |  |  |  |  |
Workers’ compensation | 2021 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,831 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 1,314 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 93,860 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 254 |  |  |  |  |  |  |  |  |
General liability | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 6,731 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 3,157 |  |  |  |  |  |  |  |  |
General liability | 2012 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 406 | 407 | 413 | 421 | 408 | 410 | 392 | 399 | 402 | 423
IBNR Reserves | $ 41 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 16,768 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 352 | 332 | 323 | 305 | 280 | 233 | 170 | 101 | 55 | 13
General liability | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 500 | 508 | 505 | 502 | 488 | 484 | 456 | 442 | 455 |
IBNR Reserves | $ 42 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 14,134 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 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 | 505 | 515 | 522 | 513 | 494 | 481 | 475 | 506 |  |
IBNR Reserves | $ 52 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 15,242 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 423 | 402 | 358 | 304 | 214 | 130 | 42 | 15 |  |
General liability | 2015 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 637 | 647 | 633 | 594 | 554 | 560 | 556 |  |  |
IBNR Reserves | $ 71 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 15,627 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 524 | 477 | 409 | 278 | 156 | 55 | 10 |  |  |
General liability | 2016 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 620 | 632 | 632 | 607 | 583 | 613 |  |  |  |
IBNR Reserves | $ 92 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 16,817 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 447 | 368 | 283 | 131 | 52 | 12 |  |  |  |
General liability | 2017 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 613 | 615 | 613 | 614 | 626 |  |  |  |  |
IBNR Reserves | $ 174 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 16,447 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 344 | 255 | 156 | 67 | 15 |  |  |  |  |
General liability | 2018 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 703 | 697 | 669 | 692 |  |  |  |  |  |
IBNR Reserves | $ 295 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 17,749 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 288 | 177 | 84 | 21 |  |  |  |  |  |
General liability | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 822 | 827 | 822 |  |  |  |  |  |  |
IBNR Reserves | $ 512 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 16,858 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 193 | 100 | 29 |  |  |  |  |  |  |
General liability | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 923 | 938 |  |  |  |  |  |  |  |
IBNR Reserves | $ 739 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 11,991 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 110 | 45 |  |  |  |  |  |  |  |
General liability | 2021 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,002 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 929 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 8,364 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 34 |  |  |  |  |  |  |  |  |
Marine [Member] | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,516 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,242 |  |  |  |  |  |  |  |  |
Marine [Member] | 2012 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 165 | 164 | 164 | 168 | 164 | 163 | 169 | 180 | 220 | 196
IBNR Reserves | $ 1 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 6,789 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 159 | 158 | 159 | 155 | 152 | 148 | 139 | 125 | 101 | 51
Marine [Member] | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 139 | 140 | 138 | 135 | 140 | 136 | 134 | 152 | 149 |
IBNR Reserves | $ (2) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 6,629 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 134 | 133 | 126 | 121 | 119 | 112 | 100 | 82 | 42 |
Marine [Member] | 2014 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 171 | 167 | 169 | 164 | 165 | 158 | 160 | 163 |  |
IBNR Reserves | $ 1 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 7,137 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 162 | 159 | 157 | 151 | 131 | 116 | 81 | 41 |  |
Marine [Member] | 2015 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 140 | 138 | 134 | 148 | 146 | 146 | 158 |  |  |
IBNR Reserves | $ (3) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 10,137 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 141 | 140 | 134 | 126 | 116 | 85 | 40 |  |  |
Marine [Member] | 2016 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 147 | 150 | 148 | 138 | 143 | 140 |  |  |  |
IBNR Reserves | $ (17) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 13,178 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 141 | 132 | 123 | 106 | 80 | 35 |  |  |  |
Marine [Member] | 2017 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 180 | 174 | 175 | 187 | 160 |  |  |  |  |
IBNR Reserves | $ (8) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 15,586 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 163 | 154 | 142 | 111 | 48 |  |  |  |  |
Marine [Member] | 2018 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 161 | 154 | 161 | 144 |  |  |  |  |  |
IBNR Reserves | $ (8) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 14,037 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 148 | 138 | 104 | 37 |  |  |  |  |  |
Marine [Member] | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 140 | 142 | 144 |  |  |  |  |  |  |
IBNR Reserves | $ 15 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 8,413 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 101 | 83 | 36 |  |  |  |  |  |  |
Marine [Member] | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 142 | 150 |  |  |  |  |  |  |  |
IBNR Reserves | $ 26 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 4,730 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 69 | 32 |  |  |  |  |  |  |  |
Marine [Member] | 2021 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 131 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 72 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 3,499 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 24 |  |  |  |  |  |  |  |  |
Package business | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 6,952 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 5,208 |  |  |  |  |  |  |  |  |
Package business | 2012 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 727 | 732 | 732 | 739 | 735 | 736 | 731 | 728 | 725 | 736
IBNR Reserves | $ 24 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 59,921 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 699 | 697 | 694 | 687 | 673 | 652 | 616 | 560 | 486 | 286
Package business | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 583 | 587 | 586 | 592 | 586 | 585 | 573 | 565 | 579 |
IBNR Reserves | $ 22 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 43,675 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 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 | 581 | 593 | 603 | 603 | 602 | 601 | 578 | 566 |  |
IBNR Reserves | $ 29 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 43,321 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 542 | 535 | 525 | 507 | 468 | 416 | 345 | 226 |  |
Package business | 2015 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 567 | 581 | 588 | 583 | 585 | 588 | 582 |  |  |
IBNR Reserves | $ 34 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 42,232 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 513 | 505 | 486 | 445 | 383 | 332 | 212 |  |  |
Package business | 2016 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 595 | 611 | 625 | 632 | 638 | 655 |  |  |  |
IBNR Reserves | $ 51 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 44,079 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 521 | 500 | 465 | 410 | 353 | 225 |  |  |  |
Package business | 2017 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 644 | 657 | 692 | 702 | 695 |  |  |  |  |
IBNR Reserves | $ 73 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 46,638 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 534 | 496 | 447 | 372 | 235 |  |  |  |  |
Package business | 2018 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 667 | 688 | 724 | 719 |  |  |  |  |  |
IBNR Reserves | $ 114 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 44,822 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 498 | 451 | 402 | 237 |  |  |  |  |  |
Package business | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 749 | 769 | 813 |  |  |  |  |  |  |
IBNR Reserves | $ 175 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 43,073 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 488 | 413 | 254 |  |  |  |  |  |  |
Package business | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 893 | 915 |  |  |  |  |  |  |  |
IBNR Reserves | $ 316 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 61,161 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 493 | 326 |  |  |  |  |  |  |  |
Package business | 2021 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 946 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 412 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 40,792 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 368 |  |  |  |  |  |  |  |  |
Property | P&C Commercial Lines | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 3,830 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 3,342 |  |  |  |  |  |  |  |  |
Property | P&C Commercial Lines | 2012 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 332 | 332 | 333 | 334 | 335 | 337 | 335 | 334 | 333 | 369
IBNR Reserves | $ 0 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 26,861 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 330 | 330 | 330 | 331 | 331 | 331 | 326 | 317 | 296 | 182
Property | P&C Commercial Lines | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 247 | 247 | 247 | 248 | 249 | 252 | 254 | 252 | 268 |
IBNR Reserves | $ 0 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 21,620 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 245 | 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 | 280 | 280 | 279 | 280 | 282 | 281 | 293 |  |
IBNR Reserves | $ (1) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 21,030 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 280 | 280 | 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 | 304 | 305 | 301 | 302 | 301 | 299 |  |  |
IBNR Reserves | $ 0 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 21,029 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 302 | 303 | 302 | 296 | 285 | 257 | 179 |  |  |
Property | P&C Commercial Lines | 2016 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 408 | 408 | 406 | 399 | 420 | 406 |  |  |  |
IBNR Reserves | $ 3 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 23,781 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 406 | 402 | 396 | 379 | 342 | 215 |  |  |  |
Property | P&C Commercial Lines | 2017 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 441 | 439 | 456 | 516 | 577 |  |  |  |  |
IBNR Reserves | $ 5 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 24,382 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 433 | 427 | 412 | 378 | 229 |  |  |  |  |
Property | P&C Commercial Lines | 2018 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 403 | 424 | 437 | 450 |  |  |  |  |  |
IBNR Reserves | $ 8 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 21,715 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 386 | 379 | 344 | 188 |  |  |  |  |  |
Property | P&C Commercial Lines | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 419 | 440 | 480 |  |  |  |  |  |  |
IBNR Reserves | $ 4 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 21,002 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 383 | 351 | 215 |  |  |  |  |  |  |
Property | P&C Commercial Lines | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 469 | 501 |  |  |  |  |  |  |  |
IBNR Reserves | $ 96 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 20,327 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 336 | 221 |  |  |  |  |  |  |  |
Property | P&C Commercial Lines | 2021 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 531 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 108 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 16,394 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 241 |  |  |  |  |  |  |  |  |
Automobile liability | P&C Commercial Lines | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 3,908 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 2,778 |  |  |  |  |  |  |  |  |
Automobile liability | P&C Commercial Lines | 2012 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 387 | 388 | 388 | 387 | 389 | 395 | 402 | 391 | 377 | 311
IBNR Reserves | $ 6 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 36,053 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 379 | 378 | 376 | 372 | 359 | 346 | 307 | 234 | 143 | 65
Automobile liability | P&C Commercial Lines | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 333 | 334 | 336 | 339 | 340 | 341 | 334 | 318 | 311 |
IBNR Reserves | $ 7 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 32,242 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 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 | 333 | 334 | 341 | 337 | 331 | 317 | 309 |  |
IBNR Reserves | $ 6 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 29,613 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 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 | 360 | 359 | 356 | 356 | 372 | 358 | 308 |  |  |
IBNR Reserves | $ 10 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 28,565 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 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 | 391 | 391 | 390 | 393 | 385 |  |  |  |
IBNR Reserves | $ 15 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 29,167 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 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 | 381 | 383 | 379 | 383 | 372 |  |  |  |  |
IBNR Reserves | $ 11 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 26,341 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 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 | 406 | 405 | 396 | 349 |  |  |  |  |  |
IBNR Reserves | $ 36 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 24,610 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 305 | 238 | 153 | 62 |  |  |  |  |  |
Automobile liability | P&C Commercial Lines | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 450 | 439 | 425 |  |  |  |  |  |  |
IBNR Reserves | $ 114 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 28,216 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 247 | 160 | 67 |  |  |  |  |  |  |
Automobile liability | P&C Commercial Lines | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 424 | 428 |  |  |  |  |  |  |  |
IBNR Reserves | $ 227 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 21,557 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 119 | 55 |  |  |  |  |  |  |  |
Automobile liability | P&C Commercial Lines | 2021 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 440 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 340 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 17,404 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 55 |  |  |  |  |  |  |  |  |
Automobile liability | P&C Personal Lines | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 11,104 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 9,809 |  |  |  |  |  |  |  |  |
Automobile liability | P&C Personal Lines | 2012 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,128 | 1,129 | 1,130 | 1,130 | 1,130 | 1,133 | 1,142 | 1,146 | 1,149 | 1,141
IBNR Reserves | $ 4 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 210,757 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,123 | 1,123 | 1,122 | 1,120 | 1,114 | 1,104 | 1,067 | 986 | 818 | 441
Automobile liability | P&C Personal Lines | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,155 | 1,156 | 1,157 | 1,153 | 1,152 | 1,153 | 1,144 | 1,145 | 1,131 |
IBNR Reserves | $ 6 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 205,485 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 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 | 1,201 | 1,202 | 1,199 | 1,200 | 1,198 | 1,153 | 1,146 |  |
IBNR Reserves | $ 6 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 209,022 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 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 | 1,324 | 1,328 | 1,331 | 1,330 | 1,338 | 1,340 | 1,195 |  |  |
IBNR Reserves | $ 8 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 216,889 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 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 | 1,386 | 1,395 | 1,397 | 1,393 | 1,402 | 1,407 |  |  |  |
IBNR Reserves | $ 11 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 215,839 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 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 | 1,200 | 1,214 | 1,228 | 1,275 | 1,277 |  |  |  |  |
IBNR Reserves | $ 18 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 187,513 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 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 | 1,058 | 1,072 | 1,104 | 1,108 |  |  |  |  |  |
IBNR Reserves | $ 51 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 156,152 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 965 | 888 | 710 | 359 |  |  |  |  |  |
Automobile liability | P&C Personal Lines | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 991 | 1,010 | 1,018 |  |  |  |  |  |  |
IBNR Reserves | $ 97 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 139,360 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 816 | 654 | 323 |  |  |  |  |  |  |
Automobile liability | P&C Personal Lines | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 782 | 805 |  |  |  |  |  |  |  |
IBNR Reserves | $ 192 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 95,755 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 486 | 238 |  |  |  |  |  |  |  |
Automobile liability | P&C Personal Lines | 2021 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 881 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 444 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 94,494 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 247 |  |  |  |  |  |  |  |  |
Commercial automobile physical damage | P&C Commercial Lines | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 172 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 162 |  |  |  |  |  |  |  |  |
Commercial automobile physical damage | P&C Commercial Lines | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 63 | 64 | 63 |  |  |  |  |  |  |
IBNR Reserves | $ 1 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 19,853 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 62 | 62 | 56 |  |  |  |  |  |  |
Commercial automobile physical damage | P&C Commercial Lines | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 51 | 51 |  |  |  |  |  |  |  |
IBNR Reserves | $ 1 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 14,671 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 50 | 45 |  |  |  |  |  |  |  |
Commercial automobile physical damage | P&C Commercial Lines | 2021 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 58 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 2 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 14,253 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 50 |  |  |  |  |  |  |  |  |
Professional liability | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 2,511 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,335 |  |  |  |  |  |  |  |  |
Professional liability | 2012 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 212 | 217 | 225 | 219 | 221 | 221 | 218 | 238 | 238 | 242
IBNR Reserves | $ (3) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 7,037 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 176 | 175 | 175 | 172 | 169 | 155 | 139 | 100 | 67 | 17
Professional liability | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 169 | 171 | 171 | 173 | 174 | 174 | 187 | 195 | 207 |
IBNR Reserves | $ 14 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 5,979 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 148 | 142 | 137 | 131 | 116 | 88 | 67 | 44 | 10 |
Professional liability | 2014 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 174 | 183 | 182 | 179 | 178 | 181 | 183 | 187 |  |
IBNR Reserves | $ 21 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 6,734 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 145 | 146 | 135 | 131 | 108 | 74 | 38 | 8 |  |
Professional liability | 2015 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 200 | 207 | 214 | 190 | 180 | 174 | 164 |  |  |
IBNR Reserves | $ 15 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 7,245 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 164 | 141 | 125 | 107 | 85 | 40 | 9 |  |  |
Professional liability | 2016 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 197 | 196 | 197 | 204 | 176 | 183 |  |  |  |
IBNR Reserves | $ 27 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 8,391 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 149 | 125 | 112 | 88 | 51 | 8 |  |  |  |
Professional liability | 2017 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 241 | 226 | 232 | 203 | 205 |  |  |  |  |
IBNR Reserves | $ 47 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 9,466 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 151 | 123 | 88 | 48 | 11 |  |  |  |  |
Professional liability | 2018 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 278 | 278 | 281 | 248 |  |  |  |  |  |
IBNR Reserves | $ 74 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 10,040 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 166 | 130 | 73 | 15 |  |  |  |  |  |
Professional liability | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 336 | 317 | 298 |  |  |  |  |  |  |
IBNR Reserves | $ 150 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 9,654 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 150 | 78 | 21 |  |  |  |  |  |  |
Professional liability | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 365 | 370 |  |  |  |  |  |  |  |
IBNR Reserves | $ 259 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 7,713 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 71 | 19 |  |  |  |  |  |  |  |
Professional liability | 2021 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 339 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 310 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 5,450 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 15 |  |  |  |  |  |  |  |  |
Bond | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 625 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 254 |  |  |  |  |  |  |  |  |
Bond | 2012 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 46 | 48 | 48 | 45 | 49 | 49 | 55 | 61 | 70 | 71
IBNR Reserves | $ 11 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,729 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 34 | 35 | 35 | 34 | 26 | 26 | 24 | 26 | 25 | 12
Bond | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 34 | 34 | 35 | 39 | 49 | 48 | 55 | 58 | 64 |
IBNR Reserves | $ 13 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,468 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 20 | 20 | 20 | 19 | 19 | 19 | 17 | 9 | 3 |
Bond | 2014 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 60 | 60 | 59 | 59 | 67 | 66 | 67 | 71 |  |
IBNR Reserves | $ 8 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,387 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 47 | 46 | 44 | 43 | 43 | 40 | 31 | 18 |  |
Bond | 2015 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 47 | 48 | 54 | 60 | 63 | 67 | 67 |  |  |
IBNR Reserves | $ 17 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,395 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 30 | 32 | 34 | 31 | 24 | 20 | 9 |  |  |
Bond | 2016 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 45 | 51 | 55 | 61 | 61 | 61 |  |  |  |
IBNR Reserves | $ 23 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,339 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 22 | 22 | 20 | 15 | 12 | 2 |  |  |  |
Bond | 2017 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 79 | 94 | 101 | 90 | 63 |  |  |  |  |
IBNR Reserves | $ 36 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,724 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 42 | 54 | 55 | 46 | 5 |  |  |  |  |
Bond | 2018 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 71 | 72 | 68 | 68 |  |  |  |  |  |
IBNR Reserves | $ 36 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,664 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 24 | 23 | 16 | 6 |  |  |  |  |  |
Bond | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 74 | 73 | 72 |  |  |  |  |  |  |
IBNR Reserves | $ 58 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,779 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 15 | 13 | 3 |  |  |  |  |  |  |
Bond | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 84 | 83 |  |  |  |  |  |  |  |
IBNR Reserves | $ 71 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,889 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 12 | 4 |  |  |  |  |  |  |  |
Bond | 2021 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 85 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 68 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,960 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 8 |  |  |  |  |  |  |  |  |
Assumed Reinsurance [Member] | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,384 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,106 |  |  |  |  |  |  |  |  |
Assumed Reinsurance [Member] | 2012 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 120 | 120 | 120 | 119 | 120 | 115 | 88 | 93 | 99 | 107
IBNR Reserves | $ 0 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,468 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 119 | 119 | 119 | 118 | 118 | 112 | 85 | 83 | 77 | 38
Assumed Reinsurance [Member] | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 103 | 103 | 103 | 102 | 102 | 105 | 103 | 119 | 115 |
IBNR Reserves | $ (1) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,656 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 103 | 103 | 103 | 101 | 100 | 98 | 91 | 83 | 53 |
Assumed Reinsurance [Member] | 2014 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 115 | 116 | 116 | 115 | 118 | 122 | 142 | 119 |  |
IBNR Reserves | $ (1) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,820 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 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 | 96 | 96 | 95 | 94 | 94 | 92 | 102 |  |  |
IBNR Reserves | $ 0 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,582 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 95 | 94 | 91 | 83 | 77 | 65 | 42 |  |  |
Assumed Reinsurance [Member] | 2016 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 102 | 102 | 100 | 98 | 91 | 89 |  |  |  |
IBNR Reserves | $ (5) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,730 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 97 | 95 | 90 | 84 | 66 | 36 |  |  |  |
Assumed Reinsurance [Member] | 2017 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 153 | 157 | 162 | 153 | 129 |  |  |  |  |
IBNR Reserves | $ (3) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 2,166 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 147 | 145 | 135 | 116 | 44 |  |  |  |  |
Assumed Reinsurance [Member] | 2018 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 135 | 130 | 128 | 129 |  |  |  |  |  |
IBNR Reserves | $ (13) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 2,263 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 140 | 134 | 112 | 25 |  |  |  |  |  |
Assumed Reinsurance [Member] | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 187 | 190 | 181 |  |  |  |  |  |  |
IBNR Reserves | $ 20 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 2,522 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 154 | 132 | 62 |  |  |  |  |  |  |
Assumed Reinsurance [Member] | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 181 | 183 |  |  |  |  |  |  |  |
IBNR Reserves | $ 71 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 1,623 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 90 | 50 |  |  |  |  |  |  |  |
Assumed Reinsurance [Member] | 2021 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 192 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 104 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 584 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 46 |  |  |  |  |  |  |  |  |
Personal automobile physical damage | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,200 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 1,170 |  |  |  |  |  |  |  |  |
Personal automobile physical damage | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 441 | 442 | 445 |  |  |  |  |  |  |
IBNR Reserves | $ 0 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 277,060 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 441 | 441 | 427 |  |  |  |  |  |  |
Personal automobile physical damage | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 346 | 349 |  |  |  |  |  |  |  |
IBNR Reserves | $ 5 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 210,783 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 341 | 333 |  |  |  |  |  |  |  |
Personal automobile physical damage | 2021 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 413 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ (6) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 213,209 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 388 |  |  |  |  |  |  |  |  |
Homeowners | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 6,307 |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 5,982 |  |  |  |  |  |  |  |  |
Homeowners | 2012 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 737 | 737 | 738 | 738 | 738 | 739 | 741 | 741 | 741 | 774
IBNR Reserves | $ 0 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 142,860 |  |  |  |  |  |  |  |  |
Homeowners | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 629 | 630 | 629 | 630 | 632 | 634 | 637 | 638 | 673 |
IBNR Reserves | $ 1 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 113,552 |  |  |  |  |  |  |  |  |
Homeowners | 2014 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 698 | 698 | 698 | 698 | 700 | 702 | 707 | 710 |  |
IBNR Reserves | $ 0 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 121,923 |  |  |  |  |  |  |  |  |
Homeowners | 2015 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 684 | 684 | 684 | 684 | 690 | 703 | 690 |  |  |
IBNR Reserves | $ 1 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 119,997 |  |  |  |  |  |  |  |  |
Homeowners | 2016 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 658 | 658 | 658 | 663 | 673 | 669 |  |  |  |
IBNR Reserves | $ 2 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 119,793 |  |  |  |  |  |  |  |  |
Homeowners | 2017 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 775 | 783 | 884 | 889 | 866 |  |  |  |  |
IBNR Reserves | $ 6 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 124,713 |  |  |  |  |  |  |  |  |
Homeowners | 2018 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 642 | 673 | 910 | 903 |  |  |  |  |  |
IBNR Reserves | $ (6) |  |  |  |  |  |  |  |  |
Claims Reported | claim | 102,784 |  |  |  |  |  |  |  |  |
Homeowners | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 470 | 475 | 501 |  |  |  |  |  |  |
IBNR Reserves | $ 13 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 84,536 |  |  |  |  |  |  |  |  |
Homeowners | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 512 | 525 |  |  |  |  |  |  |  |
IBNR Reserves | $ 26 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 87,841 |  |  |  |  |  |  |  |  |
Homeowners | 2021 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 502 |  |  |  |  |  |  |  |  |
IBNR Reserves | $ 107 |  |  |  |  |  |  |  |  |
Claims Reported | claim | 71,196 |  |  |  |  |  |  |  |  |
Homeowners | P&C Personal Lines | Segment Reconciling Items |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 5,982 |  |  |  |  |  |  |  |  |
Homeowners | P&C Personal Lines | 2012 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 736 | 736 | 736 | 735 | 734 | 731 | 727 | 719 | 696 | $ 547
Homeowners | P&C Personal Lines | 2013 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 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 | 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 | 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 | 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 | 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 | 619 | 616 | 712 | $ 484 |  |  |  |  |  |
Homeowners | P&C Personal Lines | 2019 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 445 | 425 | $ 318 |  |  |  |  |  |  |
Homeowners | P&C Personal Lines | 2020 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | 454 | $ 335 |  |  |  |  |  |  |  |
Homeowners | P&C Personal Lines | 2021 |  |  |  |  |  |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |  |  |  |  |  |
Cumulative Paid Losses & Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 305 |  |  |  |  |  |  |  |  |

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