Revenue Recognition - Contract Costs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Acquisition Costs
Capitalized Contract Cost [Line Items]
Beginning Balance	$ 58	$ 63	$ 61	$ 64
Cost Incurred	13	12	22	25
Amortization	(12)	(13)	(24)	(27)
Ending Balances	59	62	59	62
Fulfillment Costs
Capitalized Contract Cost [Line Items]
Beginning Balance	46	47	46	47
Cost Incurred	9	10	19	19
Amortization	(10)	(10)	(20)	(19)
Ending Balances	$ 45	$ 47	$ 45	$ 47