Derivative Financial Instruments - Narrative (Details) |
9 Months Ended | |
|---|---|---|
|
Sep. 30, 2024
USD ($)
counterparty
|
Dec. 31, 2023
USD ($)
|
|
| Derivative [Line Items] | ||
| Number of central counterparties | counterparty | 2 | |
| Notional value | $ 943,285,000 | $ 1,906,092,000 |
| Derivative, fair value, amount offset against collateral, net | 6,000,000 | 9,000,000 |
| Estimated accumulated gain (loss) to be reclassified in next 12 months | (20,000,000) | |
| Cash collateral held relative to derivative exposure | 0 | 0 |
| Cash collateral pledged | 6,000,000 | $ 9,000,000 |
| CME | ||
| Derivative [Line Items] | ||
| Notional value | $ 855,000,000 | |
| Percent of total notional derivative contracts | 90.60% | |
| Amount of variation margin included as settlement | $ (20,000,000) | |
| LCH | ||
| Derivative [Line Items] | ||
| Notional value | $ 88,000,000 | |
| Percent of total notional derivative contracts | 9.40% | |
| Amount of variation margin included as settlement | $ (1,000,000) |