Income Taxes (Details 6) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of unrecognized income tax benefits
Unrecognized tax benefits, beginning of year	$ 119	$ 119	$ 119
Additions for income tax positions related to current year	2	0	0
Additions for income tax positions related to prior year	10	0	0
Unrecognized tax benefits, end of year	131	119	119
Unrecognized tax benefits that, if recognized, would impact the effective tax rate	131	119	119
Recognized interest and penalties	1
Accrued interest and penalties	$ 1	1
Maximum
Reconciliation of unrecognized income tax benefits
Recognized interest and penalties		$ (1)	$ 1