Revenue Recognition - Capitalized Contract Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Acquisition Costs
Capitalized Contract Cost [Roll Forward]
Beginning of period balance	$ 203	$ 182
Costs incurred	40	33
Amortization	(33)	(33)
End of period balance	210	182
Fulfillment Costs
Capitalized Contract Cost [Roll Forward]
Beginning of period balance	222	184
Costs incurred	51	36
Amortization	(37)	(31)
End of period balance	$ 236	$ 189