Recent Financing Transactions - BHE (Details) $ in Millions, $ in Millions	Jul. 31, 2021 USD ($)	Jun. 30, 2021 USD ($)	May 31, 2021 CAD ($)	Apr. 30, 2021 USD ($)	Apr. 30, 2021 CAD ($)
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
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
EGTS
Debt Instrument [Line Items]
Face amount		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
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 | MEC | MEC First Mortgage Bonds, 2.70%, Due August 2052 | Subsequent Event
Debt Instrument [Line Items]
Face amount	$ 500
Stated interest rate	2.70%
Subsidiary Debt | PAC | First Mortgage Bonds, 2.90%, Due 2052 | Subsequent Event
Debt Instrument [Line Items]
Face amount	$ 1,000
Stated interest rate	2.90%
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%