Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 2	$ 1
Unrecognized Tax Benefits, Period Increase (Decrease)	$ (1)	$ 0	$ 2
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 122	$ 439	$ 448
Effective Income Tax Rate Reconciliation, Percent	13.00%	44.00%	35.00%
Tax Cuts and Jobs Act, Income Tax Expense (Benefit)	$ (377)	$ 0	$ 0
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	458	465
Additions for current year tax positions	28	0	6
Additions for tax positions of prior years	14	3	4
Reductions for tax positions of prior years	0	(6)	(5)
Lapse of statute of limitations	(1)	(4)	(3)
Ending balance	122	458	465
Unrecognized Tax Benefits, Income Tax Penalties Accrued	1	0
Unrecognized Tax Benefits, Income Tax Penalties Expense	$ 1	$ 0	$ 0
UNITED STATES
Income Tax Contingency [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 34
Effective Income Tax Rate Reconciliation, Percent	35.00%