Revenue from Contracts with Customers - Contract Costs (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Capitalized Contract Cost [Abstract] | |||
| Deferred incremental costs to obtain contracts | $ 1,500,000,000 | $ 1,100,000,000 | |
| Average amortization period, deferred contract costs (in months) | 24 months | ||
| Amortization of deferred costs | $ 1,100,000,000 | 865,000,000 | |
| Impairment losses recognized on deferred contract cost assets | $ 0 | $ 0 | $ 0 |