Commitments and Contingencies Commitments and Contingencies (European Commission Investigation) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Loss Contingency, Loss in Period		$ 0	$ 2	$ 89
Loss Contingencies [Line Items]
Loss Contingency, Loss in Period		$ 0	$ 2	$ 89
European Commission Competition Law Investigation [Member] | Settled Litigation [Member]
Commitments and Contingencies Disclosure [Abstract]
Loss Contingency, Loss in Period	$ 92
Loss Contingencies [Line Items]
Loss Contingency, Loss in Period	$ 92