Short-term Debt and Credit Facilities - Narrative (Details) £ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($)	Feb. 21, 2025 USD ($)	Dec. 31, 2024 GBP (£)	Dec. 31, 2024 CAD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 CAD ($)
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	$ 11,596,000,000				$ 10,705,000,000
Short-term debt	1,123,000,000				4,148,000,000
BHE
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	3,500,000,000				3,500,000,000
Short-term debt	$ 180,000,000				$ 1,935,000,000
Weighted average interest rate	4.70%		4.70%	4.70%	5.59%	5.59%
Letters of credit outstanding	$ 100,000,000				$ 105,000,000
BHE Renewables
Line of Credit Facility [Line Items]
Letters of credit outstanding	287,000,000				311,000,000
PAC
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	2,900,000,000				2,000,000,000
Short-term debt	$ 240,000,000				$ 1,604,000,000
Weighted average interest rate	4.65%		4.65%	4.65%	6.16%	6.16%
Letters of credit outstanding	$ 34,000,000				$ 168,000,000
MEC
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	1,505,000,000				1,505,000,000
Short-term debt	0				0
Letters of credit outstanding	53,000,000				55,000,000
NPC
Line of Credit Facility [Line Items]
Short-term debt	0				0
SPPC
Line of Credit Facility [Line Items]
Short-term debt	0				0
Northern Powergrid
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	344,000,000				346,000,000
Short-term debt	94,000,000				92,000,000
BHE Canada
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	643,000,000				850,000,000
Short-term debt	106,000,000				97,000,000
AltaLink
Line of Credit Facility [Line Items]
Short-term debt	$ 106,000,000				$ 97,000,000
Weighted average interest rate	3.32%		3.32%	3.32%	5.24%	5.24%
Debt to capitalization ratio	0.75		0.75	0.75
HomeServices
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	$ 1,700,000,000				$ 1,500,000,000
Short-term debt	$ 503,000,000				420,000,000
Line of credit | BHE
Line of Credit Facility [Line Items]
Debt to capitalization ratio	0.70		0.70	0.70
Line of credit | PAC
Line of Credit Facility [Line Items]
Debt to capitalization ratio	0.57		0.57	0.57
Line of credit | MEC
Line of Credit Facility [Line Items]
Debt to capitalization ratio	0.65		0.65	0.65
Line of credit | NPC
Line of Credit Facility [Line Items]
Debt to capitalization ratio	0.65		0.65	0.65
Line of credit | SPPC
Line of Credit Facility [Line Items]
Debt to capitalization ratio	0.65		0.65	0.65
Line of credit | AltaLink Investments, L.P.
Line of Credit Facility [Line Items]
Short-term debt	$ 0				0
Debt to capitalization ratio	0.8		0.8	0.8
EBITDA to interest expense ratio	2.25		2.25	2.25
Letter of credit | PAC
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	$ 488,000,000
Letter of credit | PAC | Subsequent event
Line of Credit Facility [Line Items]
Line of credit, maximum capacity		$ 713,000,000
Additional line of credit		225,000,000
Unsecured credit facility, $3.5 billion, expiring June 2027 | BHE
Line of Credit Facility [Line Items]
Letters of credit outstanding	0				0
Unsecured credit facility, $3.5 billion, expiring June 2027 | Line of credit | BHE
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	3,500,000,000
Unsecured credit facility, $3.5 billion, expiring June 2027 | Letter of credit | BHE
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	210,000,000				300,000,000
Unsecured credit facility, expiring June 2027 | PAC
Line of Credit Facility [Line Items]
Letters of credit outstanding	0				31,000,000
Unsecured credit facility, expiring June 2027 | Line of credit | PAC
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	2,000,000,000.0
Line of credit outstanding	55,000,000
Unsecured credit facility, expiring June 2027 | Line of credit | PAC | Subsequent event
Line of Credit Facility [Line Items]
Line of credit, maximum capacity		$ 2,000,000,000
Unsecured credit facility, expiring June 2027 | Letter of credit | PAC
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	255,000,000				255,000,000
Unsecured credit facility, expiring June 2025 | Line of credit | PAC
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	$ 900,000,000
Debt instrument, term	364 days
Unsecured credit facility, $1.5 billion, expiring June 2026 | MEC
Line of Credit Facility [Line Items]
Letters of credit outstanding	$ 0				0
Unsecured credit facility, $1.5 billion, expiring June 2026 | Line of credit | MEC
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	1,500,000,000
Unsecured credit facility, $1.5 billion, expiring June 2026 | Letter of credit | MEC
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	135,000,000				345,000,000
Unsecured 364-day credit facility, $5 million, expiring June 2025 | Line of credit | MEC
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	5,000,000
Secured credit facility, $600 million, expiring June 2027 | NPC
Line of Credit Facility [Line Items]
Letters of credit outstanding	0				0
Secured credit facility, $600 million, expiring June 2027 | Line of credit | NPC
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	600,000,000				600,000,000
Secured credit facility, $600 million, expiring June 2027 | Letter of credit | NPC
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	50,000,000				50,000,000
Secured credit facility, $400 million, expiring June 2027 | SPPC
Line of Credit Facility [Line Items]
Letters of credit outstanding	0				0
Secured credit facility, $400 million, expiring June 2027 | Line of credit | SPPC
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	400,000,000				400,000,000
Secured credit facility, $400 million, expiring June 2027 | Letter of credit | SPPC
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	$ 50,000,000				50,000,000
Multicurrency revolving credit facility, expiring December 2026 | Line of credit | Northern Powergrid
Line of Credit Facility [Line Items]
Debt to regulated asset value	0.8		0.8	0.8
Interest coverage ratio	2.5		2.5	2.5
Multicurrency revolving credit facility, expiring December 2026 | Line of credit | Northern Powergrid (Northeast)
Line of Credit Facility [Line Items]
Debt to regulated asset value	0.65		0.65	0.65
Multicurrency revolving credit facility, expiring December 2026 | Revolving credit facility | Northern Powergrid
Line of Credit Facility [Line Items]
Line of credit, maximum capacity | £			£ 200
Line of credit outstanding	$ 0				0
Unsecured revolving credit facility, C$50 million, expiring December 2027 | BHE Canada
Line of Credit Facility [Line Items]
Letters of credit outstanding	$ 1,000,000				0
Unsecured revolving credit facility, C$50 million, expiring December 2027 | Letter of credit | BHE Canada
Line of Credit Facility [Line Items]
Line of credit, maximum capacity				$ 50
Unsecured revolving credit facility, C$50 million, expiring December 2027 | Revolving credit facility | BHE Canada
Line of Credit Facility [Line Items]
Line of credit, maximum capacity				$ 50
Debt to capitalization ratio	0.75		0.75	0.75
Line of credit outstanding	$ 0
Extension period	1 year
EBITDA to interest expense ratio	2.25		2.25	2.25
Secured credit facility, C$500 million, expiring December 2029 | Line of credit | AltaLink
Line of Credit Facility [Line Items]
Line of credit, maximum capacity				$ 500
Extension period	1 year
Secured credit facility, C$75 million, expiring December 2028 | AltaLink
Line of Credit Facility [Line Items]
Letters of credit outstanding	$ 1,000,000				1,000,000
Secured credit facility, C$75 million, expiring December 2028 | Line of credit | AltaLink
Line of Credit Facility [Line Items]
Line of credit, maximum capacity				$ 75
Debt to capitalization ratio	0.75		0.75	0.75
Line of credit outstanding	$ 0				0
Extension period	1 year
Secured credit facility, C$75 million, expiring December 2028 | Letter of credit | AltaLink
Line of Credit Facility [Line Items]
Line of credit, maximum capacity				$ 75		$ 75
Unsecured credit facility, C$300 million, expiring December 2026 | AltaLink Investments, L.P.
Line of Credit Facility [Line Items]
Letters of credit outstanding	$ 0				0
Unsecured credit facility, C$300 million, expiring December 2026 | Line of credit | AltaLink Investments, L.P.
Line of Credit Facility [Line Items]
Line of credit, maximum capacity				300
Extension period	1 year
Unsecured credit facility, C$300 million, expiring December 2026 | Letter of credit | AltaLink Investments, L.P.
Line of Credit Facility [Line Items]
Line of credit, maximum capacity				$ 10		10
Revolving credit facility, C$200 million | AltaLink Investments, L.P.
Line of Credit Facility [Line Items]
Letters of credit outstanding					0
Revolving credit facility, C$200 million | Line of credit | AltaLink Investments, L.P.
Line of Credit Facility [Line Items]
Line of credit, maximum capacity						200
Revolving credit facility, C$200 million | Letter of credit | AltaLink Investments, L.P.
Line of Credit Facility [Line Items]
Line of credit, maximum capacity						$ 10
Unsecured credit facility, $200 million, expiring September 2026 | Line of credit | HomeServices
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	$ 200,000,000
Short-term debt	0
Mortgage lines of credit, expire beginning March through July 2025 | Line of credit | HomeServices
Line of Credit Facility [Line Items]
Line of credit, maximum capacity	1,500,000,000				1,500,000,000
Short-term debt	$ 503,000,000				$ 420,000,000
Weighted average interest rate	5.88%		5.88%	5.88%	6.92%	6.92%