Employee Benefit Plans (MEC) Contributions and Benefit Payments (Details) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Employer Contributions in 2014	$ 8
Expected Future Benefit Payments in 2014	56
Expected Future Benefit Payments in 2015	56
Expected Future Benefit Payments in 2016	58
Expected Future Benefit Payments in 2017	60
Expected Future Benefit Payments in 2018	60
Expected Future Benefit Payments, 2019-2023	307
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Employer Contributions in 2014	1
Expected Future Benefit Payments in 2014	16
Expected Future Benefit Payments in 2015	17
Expected Future Benefit Payments in 2016	18
Expected Future Benefit Payments in 2017	20
Expected Future Benefit Payments in 2018	21
Expected Future Benefit Payments, 2019-2023	$ 108