Recent Financing Transactions Recent Financing Transactions - Long-Term Debt (Details) £ in Millions, $ in Millions, $ in Millions	Oct. 29, 2020 USD ($)	Sep. 30, 2020 CAD ($)	Sep. 30, 2020 GBP (£)	Apr. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Jan. 31, 2020 USD ($)	Jan. 01, 2020 USD ($)
Berkshire Hathaway Energy [Member] | Senior Notes, 1.650%, due 2031 [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500
Debt Instrument, Interest Rate, Stated Percentage	1.65%
Berkshire Hathaway Energy [Member] | Senior Notes, 2.850%, due 2051 [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,500
Debt Instrument, Interest Rate, Stated Percentage	2.85%
Berkshire Hathaway Energy [Member] | Senior Notes, 4.05%, due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount					$ 1,250
Debt Instrument, Interest Rate, Stated Percentage					4.05%
Berkshire Hathaway Energy [Member] | Senior Notes, 3.70%, due 2030 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount					$ 1,100
Debt Instrument, Interest Rate, Stated Percentage					3.70%
Berkshire Hathaway Energy [Member] | Senior Notes, 4.25%, due 2050 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount					$ 900
Debt Instrument, Interest Rate, Stated Percentage					4.25%
Subsidiary Debt [Member] | AltaLink, L.P. [Member] | Senior Secured Notes, 1.509%, due 2030 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 225
Debt Instrument, Interest Rate, Stated Percentage		1.509%	1.509%
Subsidiary Debt [Member] | Northern Powergrid Holdings [Member] | Green Bonds, 1.875%, due 2062 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount | £			£ 300
Debt Instrument, Interest Rate, Stated Percentage		1.875%	1.875%
Subsidiary Debt [Member] | PacifiCorp [Member] | First Mortgage Bonds, 2.70%, due 2030 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount				$ 400
Debt Instrument, Interest Rate, Stated Percentage				2.70%
Subsidiary Debt [Member] | PacifiCorp [Member] | First Mortgage Bonds, 3.30%, due 2051 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount				$ 600
Debt Instrument, Interest Rate, Stated Percentage				3.30%
Subsidiary Debt [Member] | BHE Renewables [Member] | Pinyon Pines I and II Term Loan, due 2034 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount						$ 382
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		1.77%	1.77%
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.23%	3.23%
Subsidiary Debt [Member] | BHE Renewables [Member] | Pinyon Pines I and II Term Loan, due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount						284
Subsidiary Debt [Member] | NVE Holdings [Member] | Nevada Power Company [Member] | Mortgage Securities, 2.400%, Series DD due 2030 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount						$ 425	$ 425
Debt Instrument, Interest Rate, Stated Percentage						2.40%	2.40%
Subsidiary Debt [Member] | NVE Holdings [Member] | Nevada Power Company [Member] | Mortgage Securities, 3.125%, Series EE due 2050 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount						$ 300	$ 300
Debt Instrument, Interest Rate, Stated Percentage						3.125%	3.125%
Subsidiary Debt [Member] | NVE Holdings [Member] | Nevada Power Company [Member] | Mortgage Securities, 2.750%, Series BB due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount						$ 575	$ 575
Debt Instrument, Interest Rate, Stated Percentage						2.75%	2.75%
Dominion Energy Gas Holdings, LLC [Member] | Forecast [Member] | Dominion Energy Gas Holdings, LLC [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchase Amount	$ 1,200