Regulatory Matters (MEC) Liabilities (Details) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent	$ 875		$ 750
Cost of removal accrual [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent	649	[1]	629	[1]
Average Remaining Life	24 years
Asset retirement obligations [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent	140	[2]	94	[2]
Average Remaining Life	24 years
Employee benefit plans [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent	55	[3]	0	[3]
Average Remaining Life	10 years
Other [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent	$ 31		$ 27
Regulatory liability amortization period years	Various

[1] Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing utility plant in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost.

[2] Amount predominantly represents the excess of nuclear decommission trust assets over the related asset retirement obligation. Refer to Note 12 for a discussion of asset retirement obligations.

[3] Represents amounts not yet recognized as a component of net periodic benefit cost that are to be returned to customers in future periods when recognized.