Consolidated Statements of Operations (LLC) - MidAmerican Funding, LLC and Subsidiaries [Domain] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Operating revenue:
Regulated electric	$ 461	$ 426	$ 887	$ 876
Regulated gas	110	136	405	647
Nonregulated	226	213	456	482
Total operating revenue	797	775	1,748	2,005
Regulated operating costs and expenses:
Cost of fuel, energy and capacity	104	120	226	266
Cost of gas sold	55	83	256	492
Other operating expenses	119	123	236	232
Maintenance	51	77	100	121
Depreciation and amortization	99	85	199	170
Property and other taxes	30	29	63	61
Total regulated operating costs and expenses	458	517	1,080	1,342
Nonregulated operating costs and expenses:
Cost of sales	207	194	423	435
Other	10	13	16	24
Total nonregulated operating costs and expenses	217	207	439	459
Total operating costs and expenses	675	724	1,519	1,801
Operating income	122	51	229	204
Non-operating income:
Interest income	1	1	1	1
Allowance for equity funds	6	10	11	19
Other, net	1	4	18	9
Total non-operating income	8	15	30	29
Fixed charges:
Interest on long-term debt	49	50	99	96
Other interest expense	1	1	1	1
Allowance for borrowed funds	(2)	(4)	(4)	(8)
Total fixed charges	48	47	96	89
Income before income tax benefit	82	19	163	144
Income tax benefit	(47)	(11)	(65)	(41)
Net income	$ 129	$ 30	$ 228	$ 185