Income Taxes And Other Taxes (Tables)

6 Months Ended

Jun. 30, 2012

Income Taxes And Other Taxes [Abstract]

Summary Of Effective Tax Rates

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2012		2011		2012		2011
Duke Energy	32.2	%	30.4	%	29.8	%	30.8	%
Duke Energy Carolinas	37.2	%	35.5	%	36.7	%	35.3	%
Duke Energy Ohio	39.9	%	9.6	%	38.1	%	30.4	%
Duke Energy Indiana	34.4	%	29.3	%	45.7	%	32.3	%

Schedule Of Excise Taxes

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in millions)	2012		2011		2012		2011
Duke Energy Carolinas	$	39	$	37	$	78	$	73
Duke Energy Ohio		23		25		53		59
Duke Energy Indiana		8		7		16		15
Duke Energy	$	70	$	69	$	147	$	147