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Commitments and Contingent Liabilities Contingent Debt (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 USD ($) investees | Dec. 31, 2022 USD ($) investees
Indirect Guarantee of Indebtedness |  |
Guarantor Obligations [Line Items] |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | $ 154 | $ 163
Cortez Pipeline Company |  |
Guarantor Obligations [Line Items] |  |
Percentage of Debt Guaranteed | 100.00% | 100.00%
Cortez Pipeline Company | Indirect Guarantee of Indebtedness |  |
Guarantor Obligations [Line Items] |  |
Number of equity investees subject to contingent obligation | investees | 1 | 1
Long-term Debt | Cortez Pipeline Company | Indirect Guarantee of Indebtedness |  |
Guarantor Obligations [Line Items] |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | $ 120 | $ 120

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