Change In Asset Retirement Obligations (Details) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning balance	$ 318	$ 293
Change in estimate costs	88	0
Additions	5	10
Retirements	0	(1)
Accretion	19	16
Ending balance	430	318
Reflected as: [Abstract]
Asset retirement obligations	430	318
Total ARO liability	430	318
Fossil-fueled generating facilities [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning balance	24
Change in estimate costs	98
Ending balance	127
Reflected as: [Abstract]
Total ARO liability	$ 127