Summary of Significant Accounting Policies - BHE - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Feb. 28, 2021
Allowance for Doubtful Accounts(1) [Line Items]
Inventory, other fossil fuel	$ 248	$ 296
Inventory, raw materials and supplies, gross	1,008	826
Replacement cost of inventory, higher (lower)	22	27
Goodwill impairment	0	0	$ 0
Unbilled revenue	828	718
MEC
Allowance for Doubtful Accounts(1) [Line Items]
Inventory, raw materials and supplies, gross	175	135
Replacement cost of inventory, higher (lower)	22	27
Unbilled revenue	102	85
Adjustment clause, under (over) collection in receivables	$ 156	$ 230		$ 245