Revenue Recognition - Contract Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Acquisition Costs
Capitalized Contract Cost [Line Items]
Beginning Balance	$ 51	$ 58
Cost Incurred	5	10
Amortization	(8)	(11)
Ending Balances	48	57
Fulfillment Costs
Capitalized Contract Cost [Line Items]
Beginning Balance	46	46
Cost Incurred	9	10
Amortization	(8)	(9)
Ending Balances	$ 47	$ 47