Schedule II Consolidated Valuation and Qualifying Accounts Schedule II Consolidated Valuation and Qualifying Accounts - LLC - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance		$ 40	$ 33	$ 31	$ 37
Valuation Allowances and Reserves, Charged to Cost and Expense		42	39	33
Valuation Allowances and Reserves, Deductions		35	37	39
Reserves not deducted from assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	[1]	13	13	13	11
Valuation Allowances and Reserves, Charged to Cost and Expense	[1]	7	5	7
Valuation Allowances and Reserves, Deductions	[1]	7	5	5
MidAmerican Funding, LLC and Subsidiaries [Domain] | Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance		7	7	6	7
Valuation Allowances and Reserves, Charged to Cost and Expense		8	7	7
Valuation Allowances and Reserves, Deductions		8	6	8
MidAmerican Funding, LLC and Subsidiaries [Domain] | Reserves not deducted from assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance		13	13	13	$ 11
Valuation Allowances and Reserves, Charged to Cost and Expense		7	5	7
Valuation Allowances and Reserves, Deductions		$ 7	$ 5	$ 5

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