Schedule II Consolidated Valuation and Qualifying Accounts - MEC (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year		$ 44	$ 42	$ 40
Valuation Allowances and Reserves, Charged to Cost and Expense		56	47	43
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction		(28)	(45)	(41)
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount		44	42	40	$ 77
Reserves not deducted from assets [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	[1]	12	13	13
Valuation Allowances and Reserves, Charged to Cost and Expense	[1]	3	4	6
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction	[1]	(4)	(5)	(6)
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	[1]	12	13	13	11
MidAmerican Energy Company [Member] | SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year		5	7	7
Valuation Allowances and Reserves, Charged to Cost and Expense		12	9	8
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction		(5)	(11)	(8)
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount		5	7	7	12
MidAmerican Energy Company [Member] | Reserves not deducted from assets [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year		12	13	13
Valuation Allowances and Reserves, Charged to Cost and Expense		3	4	6
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction		(4)	(5)	(6)
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount		$ 12	$ 13	$ 13	$ 11

[1] Reserves not deducted from assets relate primarily to estimated liabilities for losses retained by BHE for workers compensation, public liability and property damage claims.