Subsidiary Debt - Summary (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Par value		$ 39,634
Other Long-term Debt, Noncurrent		28,483	$ 25,492
NV Energy [Member]
Debt Instrument [Line Items]
Par value		3,836
Other long-term debt		3,821	3,817
Northern Powergrid Holdings [Member]
Debt Instrument [Line Items]
Par value	[1]	3,234
Other long-term debt		3,221	2,626
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		30,883
Other long-term debt		30,672	27,573
Other Long-term Debt, Current		2,189	2,081
Other Long-term Debt, Noncurrent		28,483	25,492
Subsidiary Debt [Member] | PacifiCorp [Member]
Debt Instrument [Line Items]
Par value		7,705
Other long-term debt		7,658	7,015
Subsidiary Debt [Member] | MidAmerican Funding [Member]
Debt Instrument [Line Items]
Par value		7,515
Other long-term debt		7,427	5,597
Subsidiary Debt [Member] | NV Energy [Member]
Debt Instrument [Line Items]
Par value		3,836
Other long-term debt		3,821	3,817
Subsidiary Debt [Member] | Northern Powergrid Holdings [Member]
Debt Instrument [Line Items]
Par value		3,234
Other long-term debt		3,221	2,626
Subsidiary Debt [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Par value		1,250
Other long-term debt		1,247	1,042
Subsidiary Debt [Member] | BHE Transmission [Member]
Debt Instrument [Line Items]
Par value	[2]	3,891
Other long-term debt		3,879	3,842
Subsidiary Debt [Member] | BHE Renewables [Member]
Debt Instrument [Line Items]
Par value		3,239
Other long-term debt		3,206	3,401
Subsidiary Debt [Member] | HomeServices [Member]
Debt Instrument [Line Items]
Par value		213
Other long-term debt		$ 213	$ 233

[1] (1)The par values for these debt instruments are denominated in sterling.

[2] ns): Par Value(1) 2019 2018AltaLink Investments, L.P.: Series 12-1 Senior Bonds, 3.674%, due 2019$— $— $148Series 13-1 Senior Bonds, 3.265%, due 2020154 154 148Series 15-1 Senior Bonds, 2.244%, due 2022154 154 146Total AltaLink Investments, L.P.308 308 442 AltaLink, L.P.: Series 2013-2 Notes, 3.621%, due 202096 96 92Series 2012-2 Notes, 2.978%, due 2022212 212 201Series 2013-4 Notes, 3.668%, due 2023385 384 366Series 2014-1 Notes, 3.399%, due 2024269 269 256Series 2016-1 Notes, 2.747%, due 2026269 269 255Series 2006-1 Notes, 5.249%, due 2036115 115 109Series 2010-1 Notes, 5.381%, due 204096 96 91Series 2010-2 Notes, 4.872%, due 2040115 115 109Series 2011-1 Notes, 4.462%, due 2041212 211 201Series 2012-1 Notes, 3.990%, due 2042404 398 380Series 2013-3 Notes, 4.922%, due 2043269 268 256Series 2014-3 Notes, 4.054%, due 2044227 226 215Series 2015-1 Notes, 4.090%, due 2045269 268 255Series 2016-2 Notes, 3.717%, due 2046346 345 328Series 2013-1 Notes, 4.446%, due 2053192 192 183Series 2014-2 Notes, 4.274%, due 2064100 100 95Total AltaLink, L.P.3,576 3,564 3,392 Other: Construction Loan, 5.620%, due 20207 7 8 Total BHE Transmission$3,891 $3,879 $3,842(1)The par values for these debt instruments are denominated in Canadian dollars.