Revenue Recognition - Additional Information - Customer Receivables and Contract Balances (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Jan. 01, 2022	Jan. 01, 2021
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue recognized from prior year contract liability	$ 14	$ 12	$ 164	$ 175
Contract liabilities					$ 317	$ 300
Minimum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract term			1 year
Maximum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract term			5 years
Weighted Average | Mass Markets Customers, Average Contract Life
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Length of customer life			32 months
Weighted Average | Business Customer, Average Contract Life
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Length of customer life			30 months