Recent Financing Transactions - BHE (Details) $ in Millions, $ in Millions	Nov. 05, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jul. 31, 2021 USD ($)	Jun. 30, 2021 USD ($)	May 31, 2021 CAD ($)	Apr. 30, 2021 USD ($)	Apr. 30, 2021 CAD ($)
PAC | Unsecured credit facility, $600 million, expiring June 2022, first facility, extended | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 600
PAC | Unsecured credit facility, $600 million, expiring June 2022, second facility, extended | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity				600
PAC | Unsecured Credit Facility, $1.2 Billion, Expiring June 2024, Second Facility, Extended | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity				1,200
HomeServices | Unsecured credit facility, $600 million, expiring September 2022 | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 600
HomeServices | Unsecured Credit Facility, Amended, Expiring September 2026 | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity		700
MEC | Unsecured credit facility, $900 million, expiring June 2022 | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity				900
MEC | Unsecured Credit Facility, $1.5 Billion, Expiring June 2024 | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity				1,500
MEC | Unsecured credit facility, $600 million, expiring August 2021 | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity				600
EGTS
Debt Instrument [Line Items]
Face amount		1,600		1,600
AltaLink Investments, L.P. | Secured Credit Facility C$75 Million Expiring December 2025 | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity					$ 75
AltaLink Investments, L.P. | Secured Credit Facility C$500 Million Expiring December 2025 | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity					500
AltaLink Investments, L.P. | Unsecured Credit Facility C$300 Million Expiring December 2025 | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity					$ 300
AltaLink Investments, L.P. | Revolving credit facility, C$200 million, expiring April 2022 | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity							$ 200
Berkshire Hathaway Energy | Unsecured credit facility, $3.5 billion, expiring June 2022 | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity				3,500
NPC | Secured Credit Facility, $400 Million, Expiring June 2024 | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity				400
SPPC | Secured Credit Facility, $250 Million, Expiring June 2024 | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 250
BHE Pipeline Group | Northern Natural Gas | Senior Notes, 3.40%, due 2051
Debt Instrument [Line Items]
Face amount						$ 550
BHE Pipeline Group | Northern Natural Gas | Senior Notes, 4.25%, due 2021
Debt Instrument [Line Items]
Face amount						$ 200
Subsidiary Debt | PAC | First Mortgage Bonds, 2.95%, Due February 2022 | Subsequent Event
Debt Instrument [Line Items]
Face amount	$ 450
Stated interest rate	2.95%
Subsidiary Debt | PAC | First Mortgage Bonds, 2.90%, Due 2052
Debt Instrument [Line Items]
Face amount			$ 1,000
Stated interest rate			2.90%
Subsidiary Debt | MEC | MEC First Mortgage Bonds, 2.70%, Due August 2052
Debt Instrument [Line Items]
Face amount			$ 500
Stated interest rate			2.70%
Subsidiary Debt | HomeServices | HomeServices | Variable-rate Term Loan - Due 2026
Debt Instrument [Line Items]
Face amount		$ 150
Subsidiary Debt | BHE Pipeline Group | Senior Notes, 3.40%, due 2051
Debt Instrument [Line Items]
Stated interest rate						3.40%	3.40%
Subsidiary Debt | BHE Pipeline Group | Senior Notes, 4.25%, due 2021
Debt Instrument [Line Items]
Stated interest rate						4.25%	4.25%