Property, Plant and Equipment, Net - BHE (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 88,062	$ 86,128
Regulated
Property, Plant and Equipment [Line Items]
Property, plant and equipment	106,070	103,397
Accumulated depreciation and amortization	(32,444)	(30,662)
Net operating assets	73,626	72,735
Construction work-in-progress	3,900	3,200
Regulated | Utility generation, transmission and distribution systems
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 89,026	86,730
Regulated | Utility generation, transmission and distribution systems | Minimum
Property, Plant and Equipment [Line Items]
Depreciable life	5 years
Regulated | Utility generation, transmission and distribution systems | Maximum
Property, Plant and Equipment [Line Items]
Depreciable life	80 years
Regulated | Interstate natural gas pipeline assets
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 17,044	16,667
Regulated | Interstate natural gas pipeline assets | Minimum
Property, Plant and Equipment [Line Items]
Depreciable life	3 years
Regulated | Interstate natural gas pipeline assets | Maximum
Property, Plant and Equipment [Line Items]
Depreciable life	80 years
Nonregulated
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 13,009	12,671
Accumulated depreciation and amortization	(2,916)	(2,586)
Net operating assets	10,093	10,085
Nonregulated | Independent power plants
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 7,058	7,012
Nonregulated | Independent power plants | Minimum
Property, Plant and Equipment [Line Items]
Depreciable life	5 years
Nonregulated | Independent power plants | Maximum
Property, Plant and Equipment [Line Items]
Depreciable life	30 years
Nonregulated | Other assets
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 5,951	5,659
Nonregulated | Other assets | Minimum
Property, Plant and Equipment [Line Items]
Depreciable life	3 years
Nonregulated | Other assets | Maximum
Property, Plant and Equipment [Line Items]
Depreciable life	40 years
Common Facilities
Property, Plant and Equipment [Line Items]
Net operating assets	$ 83,719	82,820
Property, plant and equipment, net	88,062	86,128
Construction in Progress
Property, Plant and Equipment [Line Items]
Construction work-in-progress	$ 4,343	$ 3,308