Other Financial Data - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Other Financial Data [Line Items]
Contract with customer, liability, revenue recognized	$ 79	$ 79
Interest Rate Swaps
Other Financial Data [Line Items]
Derivative asset, current	18		$ 1
Derivative asset, noncurrent	58		16
Derivative liability, current	3		8
Derivative liability, noncurrent	1		1
Other Current Liabilities
Other Financial Data [Line Items]
Deferred compensation liability	83		$ 83
Cost of Services, Exclusive of Depreciation and Amortization
Other Financial Data [Line Items]
Amortization expense	$ 12	$ 16