Income Taxes - Schedule of Components of Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 157	$ 122	$ 343
State	86	148	24
Non-U.S.	357	374	380
Total current expense	600	644	747
Deferred:
Federal	(6)	(128)	45
State	33	(22)	66
Non-U.S.	(157)	14	(19)
Total deferred expense (benefit)	(130)	(136)	92
Total income tax expense (benefit)	$ 470	$ 508	$ 839