Fair Value Measurements - BHE - Level 3 (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Commodity derivatives | ||
| Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
| Beginning balance | $ (54) | $ (72) |
| Changes included in earnings | 0 | 0 |
| Changes in fair value recognized in regulatory assets | (19) | (31) |
| Settlements | 6 | 11 |
| Ending balance | (67) | (92) |
| Interest rate derivatives | ||
| Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
| Beginning balance | 8 | 5 |
| Changes included in earnings | 2 | 9 |
| Changes in fair value recognized in regulatory assets | 0 | 0 |
| Settlements | 0 | 0 |
| Ending balance | $ 10 | $ 14 |