Derivative and Financial Instruments - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| Derivative [Line Items] | |||||
| Proceeds from sales and redemptions of investments in debt securities classified as available for sale | $ 269 | $ 300 | $ 478 | $ 511 | |
| Derivative, net liability position, aggregate fair value | 78 | 78 | $ 73 | ||
| Collateral already posted, aggregate fair value | 0 | 0 | $ 0 | ||
| In event of downgrade below investment grade | |||||
| Derivative [Line Items] | |||||
| Additional collateral, aggregate fair value | $ 39 | $ 39 | |||
| Maximum | |||||
| Derivative [Line Items] | |||||
| Investments and long-term receivables, remaining maturity | 12 years | ||||
| Minimum | |||||
| Derivative [Line Items] | |||||
| Investments and long-term receivables, remaining maturity | 1 year | ||||