Income Taxes And Other Taxes (Tables)

9 Months Ended

Sep. 30, 2012

Income Taxes And Other Taxes [Abstract]

Summary Of Effective Tax Rates

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2012		2011		2012		2011
Duke Energy	29.4	%	30.7	%	29.6	%	30.8	%
Duke Energy Carolinas	34.2	%	37.0	%	35.8	%	36.1	%
Duke Energy Ohio	45.2	%	47.3	%	38.9	%	36.9	%
Duke Energy Indiana	55.1	%	37.2	%	47.7	%	30.8	%

Schedule Of Excise Taxes

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in millions)	2012		2011		2012		2011
Duke Energy	$	178	$	81	$	325	$	228
Duke Energy Carolinas		47		45		125		118
Duke Energy Ohio		26		27		79		86
Duke Energy Indiana		9		9		25		24