Consolidated Statements of Comprehensive Income (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain], 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 Funding, LLC and Subsidiaries [Domain]
Net income	$ 143	$ 136	$ 265	$ 285
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	143	151	269	293
Comprehensive income attributable to noncontrolling interests	0	0	1	1
Comprehensive income attributable to MidAmerican Funding member	$ 143	$ 151	$ 268	$ 292