MEHC Senior Debt

12 Months Ended

Dec. 31, 2011

MEHC Senior Debt [Abstract]

Senior Debt Disclosure [Text Block]

(10) MEHC Senior Debt

MEHC senior debt represents unsecured senior obligations of MEHC and consists of the following, including fair value adjustments and unamortized premiums and discounts, as of December 31 (in millions):

	Par Value		2011		2010
3.15% Senior Notes, due 2012	$	250	$	250	$	250
5.875% Senior Notes, due 2012	492		492		500
5.00% Senior Notes, due 2014	250		250		250
5.75% Senior Notes, due 2018	650		649		649
8.48% Senior Notes, due 2028	475		484		484
6.125% Senior Bonds, due 2036	1,700		1,699		1,699
5.95% Senior Bonds, due 2037	550		547		547
6.50% Senior Bonds, due 2037	1,000		992		992
Total MEHC Senior Debt	$	5,367	$	5,363	$	5,371