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Segments of Operations - Earnings before income taxes by segment and sub-segment (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |  |
Earnings before realized gains (losses) and income taxes |  | $ 905 | $ 719 | $ 766
Realized gains (losses) on securities |  | (266) | 5 | 19
Realized gains on subsidiaries |  | 0 | 0 | 2
Earnings before income taxes |  | 639 | 724 | 787
Property and casualty insurance |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Property and casualty insurance underwriting |  | 302 | 242 | 236
Investment and other income, net | [1] | 407 | 349 | 341
Earnings before realized gains (losses) and income taxes |  | 709 | 591 | 577
Annuity |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Earnings before realized gains (losses) and income taxes |  | 361 | 380 | 368
Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Earnings before realized gains (losses) and income taxes | [2] | (165) | (252) | (179)
Property and transportation | Property and casualty insurance |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Property and casualty insurance underwriting |  | 120 | 154 | 166
Specialty casualty | Property and casualty insurance |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Property and casualty insurance underwriting |  | 141 | 104 | 78
Specialty financial | Property and casualty insurance |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Property and casualty insurance underwriting |  | 66 | 61 | 84
Other specialty | Property and casualty insurance |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Property and casualty insurance underwriting |  | (5) | (2) | 9
Other lines | Property and casualty insurance |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Property and casualty insurance underwriting | [3] | $ (20) | $ (75) | $ (101)
[1] | Includes income of $32 million (before noncontrolling interest) from the sale of an apartment property in 2016.
[2] | Primarily holding company interest and expenses, including losses on retirement of debt of $51 million in 2017 and special charges to increase A&E reserves related to AFG’s former railroad and manufacturing operations ($9 million in 2018, $24 million in 2017 and $5 million in 2016).
[3] | Includes special charges to increase asbestos and environmental (“A&E”) reserves of $18 million, $89 million and $36 million in 2018, 2017 and 2016, respectively. Also includes $18 million in favorable development related to the Neon exited lines recorded in connection with a reinsurance to close transaction in 2017 and a charge of $65 million related to Neon exited lines in 2016.

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