Basis of Presentation (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Feb. 28, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Investments		$ 71			$ 72
Disposed of by Sale
Debt Instrument [Line Items]
Assets held for sale				$ 13
Gain (loss) on write down of assets held for sale		2
Amount of consideration received	$ 15
Restructuring and other related charges		7
Royalty fee
Debt Instrument [Line Items]
Revenue		$ 34	$ 40