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Income Taxes - Effective Income Tax Rate (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Reconciliation between the U.S. corporate income tax rate and the effective income tax rate from continuing operations        
U.S. corporate statutory income tax rate (as a percent) 35.00% 35.00% 35.00% 35.00%
Dividends received deduction (as a percent) (4.00%) (11.00%) (7.00%) (10.00%)
Tax credits (as a percent) (2.00%) (4.00%) (2.00%) (2.00%)
Impact of equity method presentation (as a percent) (1.00%) (3.00%) (2.00%) (3.00%)
Local country permanent tax adjustments (as a percent) (1.00%) (2.00%) (1.00%) (1.00%)
Interest exclusion from taxable income (as a percent) (1.00%) (2.00%) (1.00%) (1.00%)
Impact of noncontrolling interest presentation (as a percent)   (2.00%)   (1.00%)
State income taxes 4.00%   2.00%  
Other income tax rate impacts (as a percent)   1.00%   (2.00%)
Effective income tax rate (as a percent) 30.00% 12.00% 24.00% 15.00%