Statements of Comprehensive Income (MEC) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
MidAmerican Energy Company [Member]
Net income	$ 103	$ 74
Other comprehensive income (loss), net of tax:
Unrealized gains on available-for-sale securities, net of tax of $1 and $1	0	0
Unrealized gains (losses) on cash flow hedges, net of tax of $12 and $(11)	18	(14)
Total other comprehensive income (loss), net of tax	18	(14)
Comprehensive income	$ 121	$ 60

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the economic entity, including both controlling (parent) and noncontrolling interests. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, including any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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