Revenue Recognition - Contract Costs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Acquisition Costs
Capitalized Contract Cost [Line Items]
Beginning Balance	$ 57	$ 58	$ 58	$ 61
Cost incurred	9	13	19	22
Amortization	(10)	(12)	(21)	(24)
Ending Balances	56	59	56	59
Fulfillment Costs
Capitalized Contract Cost [Line Items]
Beginning Balance	47	46	46	46
Cost incurred	9	9	19	19
Amortization	(9)	(10)	(18)	(20)
Ending Balances	$ 47	$ 45	$ 47	$ 45