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Income Taxes, Income Tax Returns (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Taxes [Abstract]      
Anticipated decrease in unrecognized tax benefits over the next 12 months $ 9    
Reversal of previously accrued income tax expense, including interest and penalties 25 $ 9 $ 8
Change in previously accrued income tax expenses related to tax returns     $ 8
Accrued potential interest included within current and non-current income taxes payable 11 18  
Accrued potential interest included within current and non-current income taxes payable after income taxes 7 11  
Potential penalties 8 9  
Benefit (Expense) Related Items Included in Income Taxes Expenses (4) 2  
Deferred taxes for the repatriation of earnings from certain subsidiaries   $ 17  
Undistributed earnings of non-U.S. Companies $ 708