Other Financial Data - Summary of Components of Other Current Assets (Details) - USD ($) $ in Millions |
Dec. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Other Financial Data [Abstract] | ||
| Deferred project costs | $ 39 | $ 53 |
| Prepaid expenses | 66 | 57 |
| Commissions receivable | 148 | 32 |
| Other | 49 | 21 |
| Total | $ 302 | $ 163 |