Income Taxes Unrecognized Tax Benefits Roll Forward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Decrease in Unrecognized Tax Benefits is Reasonably Possible	$ 5
Uncertain Tax Positions More Likely Than Not Largest Amount of Benefit Percentage	50.00%
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of period	$ 231	$ 217	$ 209
Additions related to current year	12	35	20
Additions related to prior year	20	31	51
Reductions related to prior year	(36)	(20)	(46)
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	(3)	(28)	(11)
Settlements	0	(4)	(6)
Balance at end of period	224	231	217
Income Tax Uncertainties [Abstract]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	207	213
Unrecognized Tax Benefits that Would Impact Effective Tax Rate, Write off of Related Deferred Tax Asset	105	103
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	28	25
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense (Benefit)	4	$ 13	$ 7
Tax Year 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	$ (26)