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Risk Management - Credit Risks (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Credit Derivatives [Line Items] |  |
Additional collateral, aggregate fair value if downgrade two notches | $ 99 |
Energy commodity derivative contracts |  |
Credit Derivatives [Line Items] |  |
Letter of credits outstanding, amount | 0 | $ 0
Initial Margin Requirements | 27 |
Cash collateral posted | 15 | 85
Other current liabilities | Cash collateral held | Energy commodity derivative contracts |  |
Credit Derivatives [Line Items] |  |
Collateral posted |  | $ 63
Restrict Cash | Cash collateral held | Energy commodity derivative contracts |  |
Credit Derivatives [Line Items] |  |
Derivative, Collateral, Right to Reclaim Cash, Variation Margins | $ 12 |

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- Definition The aggregate fair value of additional assets that would be required to be posted as collateral for derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4H + Details
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