Revenue Recognition - Contract Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Contract acquisition costs
Capitalized Contract Cost
Beginning of period balance	$ 82	$ 70	$ 77	$ 70
Costs incurred	9	12	27	24
Amortization	(13)	(12)	(26)	(24)
End of period balance	78	70	78	70
Contract fulfillment costs
Capitalized Contract Cost
Beginning of period balance	133	99	127	97
Costs incurred	30	35	57	52
Amortization	(22)	(18)	(43)	(33)
End of period balance	$ 141	$ 116	$ 141	$ 116