Consolidated Statements of Comprehensive Income (MEC) (MidAmerican Energy Company and Subsidiaries [Member], USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
MidAmerican Energy Company and Subsidiaries [Member]
Net income	$ 107	$ 108	$ 230	$ 247
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) on available-for-sale securities, net of tax of $-, $-, $- and $(1)	0	0	1	(3)
Unrealized gains (losses) on cash flow hedges, net of tax of $3, $(5), $12 and $-	4	(9)	16	0
Total other comprehensive income (loss), net of tax	4	(9)	17	(3)
Comprehensive income	$ 111	$ 99	$ 247	$ 244