Debt Term loan (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Aug. 02, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Long-term debt	$ 3,298		$ 1,686
Term loan due August 19, 2024 | Term Loan
Debt Instrument [Line Items]
Debt instrument, term	36 months
Long-term debt	$ 625	$ 650
Term loan due August 19, 2024 | Term Loan | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Spread on variable rate (LIBOR)	1.375%
Term loan due August 19, 2024 | Term Loan | Minimum | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Spread on variable rate (LIBOR)	1.125%
Term loan due August 19, 2024 | Term Loan | Maximum | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Spread on variable rate (LIBOR)	2.00%