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

12 Months Ended

Dec. 31, 2012

MidAmerican Energy Company and Subsidiaries [Member]

Line of Credit Facility [Line Items]

Short-term Debt [Text Block]

(9)Short-Term Debt and Revolving Credit Facilities

Interim financing of working capital needs and the construction program is obtained from unaffiliated parties through the sale of commercial paper or short-term borrowing from banks. MidAmerican Energy has an unsecured credit facility that had $645 million available until July 2012 and has $530 million until July 2013, which supports MidAmerican Energy's commercial paper program and its variable-rate tax-exempt bond obligations. The credit facility has a variable interest rate based on the London Interbank Offered Rate ("LIBOR") or a base rate, at MidAmerican Energy's option, plus a spread that varies based on MidAmerican Energy's credit ratings for its senior unsecured long-term debt securities. In addition, MidAmerican Energy has a $5 million unsecured credit facility, which expires in June 2013 and has a variable interest rate based on LIBOR plus a spread. The $530 million credit facility requires that MidAmerican Energy's ratio of consolidated debt, including current maturities, to total capitalization not exceed 0.65 to 1.0 as of the last day of any quarter. As of December 31, 2012, MidAmerican Energy was in compliance with the covenants of its credit facilities. MidAmerican Energy has authority from the FERC to issue commercial paper and bank notes aggregating $600 million through October 30, 2014.

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