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v3.25.1

Segment Information - Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | $ 6,181 | $ 5,779
Net investment income | 656 | 593
Realized Investment Gains (Losses) | (49) | 28
Other Income | 22 | 19
Total revenues | 6,810 | 6,419
P&C Personal Insurance | AARP Members [Member] |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 822 | 758
Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 6,170 | 5,769
Net investment income | 642 | 577
Realized Investment Gains (Losses) | (30) | 19
Other Income | 21 | 19
Total revenues | 6,803 | 6,384
Operating Segments [Member] | P&C Business Insurance |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 3,335 | 3,059
Net investment income | 437 | 391
Realized Investment Gains (Losses) | (24) | 12
Other Income | 1 | 0
Total revenues | 3,749 | 3,462
Operating Segments [Member] | P&C Personal Insurance |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 907 | 821
Net investment income | 57 | 50
Realized Investment Gains (Losses) | (2) | 1
Other Income | 20 | 19
Total revenues | 982 | 891
Operating Segments [Member] | Property & Casualty Other Operations [Member] |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 0 | 0
Net investment income | 18 | 18
Realized Investment Gains (Losses) | 0 | 0
Other Income | 0 | 0
Total revenues | 18 | 18
Operating Segments [Member] | Employee Benefits [Member] |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 1,668 | 1,639
Net investment income | 126 | 114
Realized Investment Gains (Losses) | (4) | 1
Other Income | 0 | 0
Total revenues | 1,790 | 1,754
Operating Segments [Member] | Hartford Funds [Member] |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 260 | 250
Net investment income | 4 | 4
Realized Investment Gains (Losses) | 0 | 5
Other Income | 0 | 0
Total revenues | 264 | 259
Operating Segments [Member] | Hartford Funds [Member] | Mutual fund and ETF |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 242 | 231
Operating Segments [Member] | Hartford Funds [Member] | Third-party life and annuity separate accounts [3] |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 18 | 19
Operating Segments [Member] | Workers' Compensation | P&C Business Insurance |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 918 | 917
Operating Segments [Member] | General liability | P&C Business Insurance |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 584 | 526
Operating Segments [Member] | Marine | P&C Business Insurance |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 69 | 67
Operating Segments [Member] | Package business | P&C Business Insurance |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 619 | 549
Operating Segments [Member] | Property | P&C Business Insurance |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 339 | 290
Operating Segments [Member] | Property | P&C Personal Insurance |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 283 | 249
Operating Segments [Member] | Professional liability | P&C Business Insurance |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 206 | 203
Operating Segments [Member] | Bond | P&C Business Insurance |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 85 | 78
Operating Segments [Member] | Assumed reinsurance | P&C Business Insurance |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 220 | 181
Operating Segments [Member] | Automobile | P&C Business Insurance |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 295 | 248
Operating Segments [Member] | Automobile | P&C Personal Insurance |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 624 | 572
Operating Segments [Member] | Group disability | Employee Benefits [Member] |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 900 | 890
Operating Segments [Member] | Group life | Employee Benefits [Member] |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | 650 | 645
Operating Segments [Member] | Other | Employee Benefits [Member] |  |
Segment Reporting Information [Line Items] |  |
Earned premiums and fee income | $ 118 | $ 104

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