Employee Benefit Plans - BHE (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Other Postretirement Plans | ||||
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | $ 1 | $ 1 | $ 2 | $ 2 |
| Interest cost | 6 | 7 | 13 | 14 |
| Expected return on plan assets | (8) | (9) | (18) | (18) |
| Net amortization | (1) | (2) | (2) | (3) |
| Net periodic benefit cost | (2) | (3) | (5) | (5) |
| United States | Pension Plan | ||||
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | 3 | 3 | 6 | 6 |
| Interest cost | 25 | 28 | 50 | 54 |
| Expected return on plan assets | (29) | (31) | (60) | (61) |
| Net amortization | 3 | 2 | 5 | 4 |
| Net periodic benefit cost | 2 | 2 | 1 | 3 |
| United Kingdom | Pension Plan | ||||
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | 2 | 1 | 3 | 2 |
| Interest cost | 16 | 15 | 32 | 29 |
| Expected return on plan assets | (20) | (21) | (41) | (41) |
| Net amortization | 10 | 8 | 18 | 16 |
| Net periodic benefit cost | $ 8 | $ 3 | $ 12 | $ 6 |
| X | ||||||||||
- Definition This element may include amortization costs associated with defined benefit plans that are not otherwise separately disclosed. For example, amortization of prior year gain (loss), prior service costs (credits) and transition obligations (assets). No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of cost recognized for passage of time related to defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|