Statements of Changes in Equity (MEC) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	MidAmerican Energy Company [Member] USD ($)	MidAmerican Energy Company [Member] Common Stock [Member] USD ($)	MidAmerican Energy Company [Member] Retained Earnings [Member] USD ($)	MidAmerican Energy Company [Member] Accumulated Other Comprehensive Income (Loss), Net [Member] USD ($)	MidAmerican Energy Company [Member] Preferred Securities [Member] USD ($)
Balance at Dec. 31, 2012	$ 3,635	$ 562	$ 3,070	$ (24)	$ 27
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	103		103
Other comprehensive income (loss)	18			18
Common dividends	(125)		(125)
Balance at Mar. 31, 2013	3,631	562	3,048	(6)	27
Balance at Dec. 31, 2013	3,845	561	3,295	(11)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	157		157
Other comprehensive income (loss)	15			15
Balance at Mar. 31, 2014	$ 4,017	$ 561	$ 3,452	$ 4	$ 0