Revenue Recognition - Contract Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Acquisition Costs
Capitalized Contract Costs [Roll Forward]
Beginning of period balance	$ 61	$ 64
Costs incurred	43	50
Amortization	(46)	(53)
End of period balance	58	61
Fulfillment Costs
Capitalized Contract Costs [Roll Forward]
Beginning of period balance	46	47
Costs incurred	38	39
Amortization	(38)	(40)
End of period balance	$ 46	$ 46