Revenue Recognition - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue recognized	$ 605	$ 672
Contract liabilities		$ 950	$ 1,000
Minimum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract term	1 year
Maximum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract term	5 years
Mass Markets | Weighted Average
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Length of customer life	30 months
Business | Weighted Average
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Length of customer life	29 months