Commodity Derivatives - Contingent Features (Details) - USD ($) $ in Millions |
Mar. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|
| Derivative Instruments and Hedging Activities Disclosures [Line Items] | ||
| Additional Collateral, Aggregate Fair Value | $ 14 | |
| Level 1 [Member] | ||
| Derivative Instruments and Hedging Activities Disclosures [Line Items] | ||
| Collateral Already Posted, Aggregate Fair Value | $ 70 | $ 2 |