Revenue Recognition - Contract Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Acquisition Costs
Capitalized Contract Costs [Roll Forward]
Beginning of period balance	$ 58	$ 61
Costs incurred	32	43
Amortization	(39)	(46)
End of period balance	51	58
Fulfillment Costs
Capitalized Contract Costs [Roll Forward]
Beginning of period balance	46	46
Costs incurred	34	38
Amortization	(34)	(38)
End of period balance	$ 46	$ 46