Revenue Recognition - Contract Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Acquisition Costs
Capitalized Contract Cost [Roll Forward]
Beginning of period balance	$ 76	$ 78
Costs incurred	61	58
Amortization	(55)	(60)
Classified as held for sale	(6)	0
End of period balance	76	76
Fulfillment Costs
Capitalized Contract Cost [Roll Forward]
Beginning of period balance	99	122
Costs incurred	83	90
Amortization	(76)	(86)
Classified as held for sale	0	(27)
End of period balance	$ 106	$ 99