Income Taxes - SPPC - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
|
| Schedule of Effective Income Tax Rate Reconciliation [Line Items] | |||
| Related party transaction, cash received (paid) for income taxes | $ 0 | $ 0 | |
| SPPC | |||
| Schedule of Effective Income Tax Rate Reconciliation [Line Items] | |||
| Related party transaction, cash received (paid) for income taxes | 0 | $ 0 | |
| SPPC | Related party | |||
| Schedule of Effective Income Tax Rate Reconciliation [Line Items] | |||
| Current income tax receivable (payable), related parties | $ 153 | $ 0 | |