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Condensed Financial Information of Parent Company - Condensed Statement of Earnings (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
Revenues: |  |  |  |  |  |  |  |  |  |  |
Total revenues | $ 1,808 | $ 1,835 | $ 1,646 | $ 1,576 | $ 1,737 | $ 1,705 | $ 1,581 | $ 1,475 | $ 6,865 | $ 6,498 | $ 6,145
Costs and Expenses: |  |  |  |  |  |  |  |  |  |  |
Other expenses |  |  |  |  |  |  |  |  | 422 | 353 | 336
Total costs and expenses |  |  |  |  |  |  |  |  | 6,141 | 5,711 | 5,580
Earnings before income taxes |  |  |  |  |  |  |  |  | 724 | 787 | 565
Provision for income taxes |  |  |  |  |  |  |  |  | 247 | 119 | 195
Net Earnings Attributable to Shareholders | 166 | $ 11 | $ 145 | $ 153 | 385 | $ 109 | $ 54 | $ 101 | 475 | 649 | 352
AFG |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |
Dividends from subsidiaries |  |  |  |  |  |  |  |  | 681 | 643 | 311
Equity in undistributed earnings of subsidiaries |  |  |  |  |  |  |  |  | 264 | 286 | 386
Investment and other income |  |  |  |  |  |  |  |  | 13 | 7 | 4
Total revenues |  |  |  |  |  |  |  |  | 958 | 936 | 701
Costs and Expenses: |  |  |  |  |  |  |  |  |  |  |
Interest charges on intercompany borrowings |  |  |  |  |  |  |  |  | 9 | 9 | 9
Interest charges on other borrowings |  |  |  |  |  |  |  |  | 85 | 77 | 73
Other expenses |  |  |  |  |  |  |  |  | 142 | 82 | 72
Total costs and expenses |  |  |  |  |  |  |  |  | 236 | 168 | 154
Earnings before income taxes |  |  |  |  |  |  |  |  | 722 | 768 | 547
Provision for income taxes | $ (56) |  |  |  | $ (177) |  |  |  | 247 | 119 | 195
Net Earnings Attributable to Shareholders |  |  |  |  |  |  |  |  | $ 475 | $ 649 | $ 352

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