Statements of Comprehensive Income (MEC) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
MidAmerican Energy Company [Member]
Net income	$ 145	$ 140	$ 272	$ 295
Other comprehensive income (loss), net of tax:
Unrealized gains on available-for-sale securities, net of tax of $-, $-, $1 and $1	1	1	1	1
Unrealized (losses) gains on cash flow hedges, net of tax of $-, $10, $3 and $4	(1)	14	3	7
Total other comprehensive income (loss), net of tax	0	15	4	8
Comprehensive income	$ 145	$ 155	$ 276	$ 303