Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Beginning balance	$ 151	$ 130
Additions related to current years' tax positions	7	2
Additions related to prior years' tax positions	15	37
Unrecognized Tax Benefits, Decrease Resulting from Acquisition	0	(1)
Reductions related to prior years' tax positions	0	(3)
Reductions due to lapse of statue of limitations	(9)	(9)
Settlements with tax authorities	(7)	(5)
Ending balance	$ 157	$ 151