Supplementary Financial Information - Restricted Cash Balance Sheet Location (Details) - USD ($) $ in Millions |
Jun. 30, 2023 |
Dec. 31, 2022 |
|---|---|---|
| Restricted Cash and Cash Equivalents Items [Line Items] | ||
| Total Restricted cash | $ 92 | $ 94 |
| Other current assets | ||
| Restricted Cash and Cash Equivalents Items [Line Items] | ||
| Total Restricted cash | 49 | 55 |
| Other long-term assets | ||
| Restricted Cash and Cash Equivalents Items [Line Items] | ||
| Total Restricted cash | $ 43 | $ 39 |