Short-term Debt and Credit Facilities - Narrative (Details) £ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)	Jan. 31, 2023 USD ($)	Dec. 31, 2022 GBP (£)	Dec. 31, 2022 CAD ($)	Dec. 31, 2021 USD ($)
Line of Credit Facility [Line Items]
Credit facilities	$ 10,873,000,000				$ 11,281,000,000
Short-term debt	1,119,000,000				2,009,000,000
BHE
Line of Credit Facility [Line Items]
Credit facilities	3,500,000,000				3,500,000,000
Short-term debt	$ 245,000,000				$ 0
Weighted average interest rate	4.55%		4.55%	4.55%	0.00%
BHE Renewables
Line of Credit Facility [Line Items]
Letters of credit outstanding	$ 309,000,000				$ 311,000,000
PAC
Line of Credit Facility [Line Items]
Credit facilities	1,200,000,000				1,200,000,000
Short-term debt	0				0
Letters of credit outstanding	38,000,000				19,000,000
MEC
Line of Credit Facility [Line Items]
Credit facilities	1,505,000,000				1,505,000,000
Letters of credit outstanding	34,000,000				42,000,000
NPC
Line of Credit Facility [Line Items]
Credit facilities	400,000,000				400,000,000
Short-term debt	0				180,000,000
Letters of credit outstanding	0				15,000,000
SPPC
Line of Credit Facility [Line Items]
Credit facilities	250,000,000				250,000,000
Short-term debt	0				159,000,000
Northern Powergrid
Line of Credit Facility [Line Items]
Credit facilities	296,000,000				271,000,000
Short-term debt	120,000,000				1,000,000
Line of credit, amount drawn	55,000,000				1,000,000
HomeServices
Line of Credit Facility [Line Items]
Credit facilities	2,925,000,000				3,300,000,000
Short-term debt	$ 557,000,000				1,424,000,000
Line of credit | BHE
Line of Credit Facility [Line Items]
Debt to capitalization ratio	0.70		0.70	0.70
Line of credit | BHE Renewables
Line of Credit Facility [Line Items]
Letters of credit outstanding	$ 101,000,000				101,000,000
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]
Short-term debt	$ 0				$ 339,000,000
Weighted average interest rate	0.00%		0.00%	0.00%	0.86%
Debt to capitalization ratio	0.65		0.65	0.65
Line of credit | SPPC
Line of Credit Facility [Line Items]
Weighted average interest rate	0.00%		0.00%	0.00%	0.86%
Line of credit | AltaLink
Line of Credit Facility [Line Items]
Short-term debt	$ 89,000,000				$ 108,000,000
Weighted average interest rate	4.59%		4.59%	4.59%	0.35%
Debt to capitalization ratio	0.75		0.75	0.75
Line of credit | AltaLink Investments, L.P.
Line of Credit Facility [Line Items]
Short-term debt	$ 108,000,000				$ 137,000,000
Weighted average interest rate	5.71%		5.71%	5.71%	1.46%
Debt to capitalization ratio	0.8		0.8	0.8
EBITDA to interest expense ratio	2.25		2.25	2.25
Letter of credit | AltaLink Investments, L.P.
Line of Credit Facility [Line Items]
Credit facilities				$ 10
Extension period	365 days
Unsecured credit facility, $3.5 billion, expiring June 2025 | Line of credit | BHE
Line of Credit Facility [Line Items]
Credit facilities	$ 3,500,000,000
Unsecured credit facility, $1.5 billion, expiring June 2025 | Line of credit | MEC
Line of Credit Facility [Line Items]
Credit facilities	$ 1,500,000,000
Multicurrency revolving credit facility, expiring December 2025 | 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 2025 | 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 2025 | Revolving credit facility | Northern Powergrid
Line of Credit Facility [Line Items]
Credit facilities | £			£ 200
Weighted average interest rate	3.56%		3.56%	3.56%	0.00%
Line of credit, amount drawn	$ 65,000,000				$ 0
Extension period	1 year
Secured credit facility, C$500 million, expiring December 2027 | Line of credit | AltaLink
Line of Credit Facility [Line Items]
Credit facilities				$ 500
Extension period	1 year
Secured credit facility, C$75 million, expiring December 2027 | Line of credit | AltaLink
Line of Credit Facility [Line Items]
Credit facilities				75
Extension period	1 year
Unsecured credit facility, C$300 million, expiring December 2026 | Line of credit | AltaLink Investments, L.P.
Line of Credit Facility [Line Items]
Credit facilities				300
Extension period	1 year
Revolving credit facility, C$200 million, expiring April 2023 | Line of credit | AltaLink Investments, L.P.
Line of Credit Facility [Line Items]
Credit facilities				$ 200
Extension period	1 year
Unsecured credit facility, $700 million, expiring September 2026 | Line of credit | HomeServices
Line of Credit Facility [Line Items]
Short-term debt	$ 115,000,000				$ 250,000,000
Weighted average interest rate	5.17%		5.17%	5.17%	0.95%
Mortgage lines of credit, expiring March through September 2023 | Line of credit | HomeServices
Line of Credit Facility [Line Items]
Credit facilities	$ 2,200,000,000				$ 2,600,000,000
Short-term debt	$ 442,000,000				$ 1,200,000,000
Weighted average interest rate	6.09%		6.09%	6.09%	1.91%
Line of credit | NPC
Line of Credit Facility [Line Items]
Short-term debt	$ 0				$ 180,000,000
Weighted average interest rate	0.00%		0.00%	0.00%	0.86%
Line of credit | Unsecured credit facility, $1.2 billion, expiring June 2025 | PAC
Line of Credit Facility [Line Items]
Credit facilities	$ 1,200,000,000
Debt to capitalization ratio	0.65		0.65	0.65
Line of credit | Unsecured credit facility, $800 million, expiring January 2024 | PAC | Subsequent event
Line of Credit Facility [Line Items]
Credit facilities		$ 800,000,000
Line of credit, amount drawn		$ 0
Line of credit | Secured credit facility, $400 million, expiring June 2025 | NPC
Line of Credit Facility [Line Items]
Credit facilities	$ 400,000,000
Debt to capitalization ratio	0.65		0.65	0.65
Line of credit | Secured credit facility, $250 million, expiring June 2025 | SPPC
Line of Credit Facility [Line Items]
Credit facilities	$ 250,000,000
Debt to capitalization ratio	0.65		0.65	0.65
Line of credit | Unsecured credit facility, $700 million, expiring September 2026 | HomeServices
Line of Credit Facility [Line Items]
Credit facilities	$ 700,000,000