Statements of Comprehensive Income (MEC) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
MidAmerican Energy Company [Member]
Net income	$ 32	$ 24	$ 189	$ 127
Other comprehensive income (loss), net of tax:
Unrealized gains on available-for-sale securities, net of tax of $-, $-, $1 and $1	0	0	1	0
Unrealized gains (losses) on cash flow hedges, net of tax of $6, $(10), $16 and $2	9	(14)	23	4
Total other comprehensive income (loss), net of tax	9	(14)	24	4
Comprehensive income	$ 41	$ 10	$ 213	$ 131