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v3.8.0.1

Segment Information - Revenues (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | $ 15,121 | $ 14,554 | $ 14,361
Total net investment income |  |  |  |  |  |  |  |  | 1,603 | 1,577 | 1,561
Net realized capital gains (loss) |  |  |  |  |  |  |  |  | 165 | (110) | (12)
Other revenues |  |  |  |  |  |  |  |  | 85 | 86 | 87
Total revenues | $ 4,539 | $ 4,144 | $ 4,168 | $ 4,123 | $ 3,978 | $ 4,114 | $ 4,085 | $ 3,930 | 16,974 | 16,107 | 15,997
Group life |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 3,677 | 3,223 | 3,136
Operating Segments | Commercial Lines |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 6,902 | 6,690 | 6,551
Total net investment income |  |  |  |  |  |  |  |  | 949 | 917 | 910
Installment fees |  |  |  |  |  |  |  |  | 37 | 39 | 40
Operating Segments | Commercial Lines | Workers’ compensation |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 3,287 | 3,187 | 3,065
Operating Segments | Commercial Lines | Liability |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 604 | 585 | 568
Operating Segments | Commercial Lines | Package business |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 1,301 | 1,249 | 1,223
Operating Segments | Commercial Lines | Property |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 604 | 577 | 638
Operating Segments | Commercial Lines | Professional liability |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 246 | 231 | 222
Operating Segments | Commercial Lines | Bond |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 230 | 218 | 218
Operating Segments | Commercial Lines | Automobile |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 630 | 643 | 617
Operating Segments | Personal Lines |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 3,734 | 3,937 | 3,910
Total net investment income |  |  |  |  |  |  |  |  | 141 | 135 | 128
Installment fees |  |  |  |  |  |  |  |  | 44 | 39 | 37
Operating Segments | Personal Lines | AARP Members |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 3,200 | 3,300 | 3,200
Operating Segments | Personal Lines | Automobile |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 2,617 | 2,749 | 2,698
Operating Segments | Personal Lines | Homeowners |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 1,117 | 1,188 | 1,212
Operating Segments | Property & Casualty Other Operations |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 0 | 0 | 32
Total net investment income |  |  |  |  |  |  |  |  | 106 | 127 | 133
Operating Segments | Group Benefits |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 3,677 | 3,223 | 3,136
Total net investment income |  |  |  |  |  |  |  |  | 381 | 366 | 371
Operating Segments | Group Benefits | Group disability |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 1,718 | 1,506 | 1,479
Operating Segments | Group Benefits | Group life |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 1,745 | 1,512 | 1,477
Operating Segments | Group Benefits | Other |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 214 | 205 | 180
Operating Segments | Mutual Funds |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 804 | 701 | 723
Total net investment income |  |  |  |  |  |  |  |  | 3 | 1 | 1
Operating Segments | Mutual Funds | Discontinued Operations, Held-for-sale |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 98 | 100 | 116
Operating Segments | Mutual Funds | Mutual Fund |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 706 | 601 | 607
Corporate |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned premiums and fee income |  |  |  |  |  |  |  |  | 4 | 3 | 9
Total net investment income |  |  |  |  |  |  |  |  | $ 23 | $ 31 | $ 18

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