Short-term Debt and Revolving Credit Facilities (MEC) (Tables) (MidAmerican Energy Company and Subsidiaries [Member])

12 Months Ended

Dec. 31, 2012

MidAmerican Energy Company and Subsidiaries [Member]

Line of Credit Facility [Line Items]

Schedule of Line of Credit Facilities [Table Text Block]

The following table summarizes MidAmerican Energy's availability under its two unsecured revolving credit facilities as of December 31 (in millions):

	2012			2011
Revolving credit facilities	$	535		$	650
Less:
Variable-rate tax-exempt bond support	(195		)	(195		)
Net revolving credit facilities	$	340		$	455