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Consolidated Statements Of Shareholders' Equity (Parenthetical) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Other Comprehensive Income (Loss), Available-for-sale Securities, before Reclassification Adjustments, Tax $ (228) $ 72 $ 154
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax (13) 28 (2)
Net unrealized appreciation on investments, Change in year, income tax (expense) benefit (241) 100 152
Cumulative translation adjustment, Change in year, income tax(expense) benefit 5 30 0
Pension liability adjustment, Change in year, income tax (expense) benefit $ 5 $ (184) $ (6)