Revenue from Contracts with Customers - Contract Costs (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2021
Capitalized Contract Cost [Abstract]
Deferred incremental costs to obtain contracts	$ 1,600,000,000			$ 1,500,000,000
Average amortization period, deferred contract costs (in months)	24 months
Amortization of deferred costs	$ 324,000,000	$ 248,000,000
Impairment losses recognized on deferred contract cost assets	$ 0	$ 0	$ 0