Summary of Significant Accounting Policies - Schedule of Changes in Allowance for Uncollectible Accounts (Details) - SCE - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Credit Loss Roll Forward | ||||
| Beginning balance | $ 386 | $ 340 | $ 402 | $ 390 |
| Current period provision for uncollectible accounts | 68 | 88 | 130 | 169 |
| Write-offs, net of recoveries | (77) | (71) | (155) | (202) |
| Ending balance | 377 | 357 | 377 | 357 |
| Recovery from customers, incremental costs | 47 | 69 | 91 | 135 |
| Customers | ||||
| Credit Loss Roll Forward | ||||
| Beginning balance | 344 | 322 | 360 | 372 |
| Current period provision for uncollectible accounts | 64 | 82 | 124 | 160 |
| Write-offs, net of recoveries | (76) | (69) | (152) | (197) |
| Ending balance | 332 | 335 | 332 | 335 |
| All others | ||||
| Credit Loss Roll Forward | ||||
| Beginning balance | 42 | 18 | 42 | 18 |
| Current period provision for uncollectible accounts | 4 | 6 | 6 | 9 |
| Write-offs, net of recoveries | (1) | (2) | (3) | (5) |
| Ending balance | $ 45 | $ 22 | $ 45 | $ 22 |