Statements of Comprehensive Income (MEC) - MidAmerican Energy Company [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net income	$ 131	$ 32	$ 225	$ 189
Other comprehensive income (loss), net of tax:
Unrealized gains on available-for-sale securities, net of tax of $-, $-, $- and $1	1	0	1	1
Unrealized (losses) gains on cash flow hedges, net of tax of $(3), $6, $(1) and $16	(6)	9	(4)	23
Total other comprehensive income (loss), net of tax	(5)	9	(3)	24
Comprehensive income, net of tax	$ 126	$ 41	$ 222	$ 213