Fair Value Measurements - Recurring & Disclosure (Details) - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
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|---|---|---|---|---|---|---|---|---|---|
| Carrying value [member] | |||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||
| Cash equivalents | [1] | $ 338 | $ 622 | ||||||
| Interest rate swaps, assets | [1],[2] | 108 | |||||||
| Interest rate swaps, liabilities | [1],[2] | 41 | |||||||
| Carrying value [member] | Long-term Debt Excluding Finance Lease Liabilities and Other Debt | |||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||
| Long-term debt | [1],[3] | 8,619 | 8,619 | ||||||
| Level 1 [member] | Long-term Debt Excluding Finance Lease Liabilities and Other Debt | |||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||
| Long-term debt | 5,292 | 6,180 | [3] | ||||||
| Level 2 [member] | |||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||
| Cash equivalents | 338 | 622 | |||||||
| Interest rate swaps, assets | [2] | 108 | |||||||
| Interest rate swaps, liabilities | [2] | 41 | |||||||
| Level 3 [member] | Long-term Debt Excluding Finance Lease Liabilities and Other Debt | |||||||||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||
| Long-term debt | [3] | $ 2,616 | $ 2,599 | ||||||
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