v3.10.0.1
Total Equity (Cumulative Foreign Currency Translation Adjustments) (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Total Equity    
Associated with net investments in subsidiaries with a non-U.S. dollar functional currency $ (1,851) $ (1,434)
Hedges, net of tax 962 667
Total (889) (767)
Carrying value of net investments in non-U.S. dollar functional currency subsidiaries subject to hedges $ 11,608 $ 10,139