Summary of Significant Accounting Policies - Schedule of Changes in Allowance for Uncollectible Accounts (Details) - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
|
| Credit Loss Roll Forward | |||
| Allowance for uncollectible accounts | $ 39 | $ 49 | |
| SCE | |||
| Credit Loss Roll Forward | |||
| Beginning balance | 402 | $ 390 | |
| Current period provision for uncollectible accounts | 62 | 81 | |
| Write-offs, net of recoveries | (78) | (131) | |
| Ending balance | 386 | 340 | |
| Recovery from customers, incremental costs | 44 | 66 | |
| Allowance for uncollectible accounts | 39 | $ 49 | |
| SCE | Customers | |||
| Credit Loss Roll Forward | |||
| Beginning balance | 360 | 372 | |
| Current period provision for uncollectible accounts | 60 | 78 | |
| Write-offs, net of recoveries | (76) | (128) | |
| Ending balance | 344 | 322 | |
| SCE | All others | |||
| Credit Loss Roll Forward | |||
| Beginning balance | 42 | 18 | |
| Current period provision for uncollectible accounts | 2 | 3 | |
| Write-offs, net of recoveries | (2) | (3) | |
| Ending balance | $ 42 | $ 18 | |