Income Taxes (Tables)

3 Months Ended

Mar. 31, 2014

Income Tax Disclosure [Line Items]

Summary of Effective Tax Rates

	Three Months Ended March 31,
		2014		2013
Duke Energy		58.6	%	34.2	%
Duke Energy Carolinas		37.4	%	37.1	%
Progress Energy		36.9	%	39.6	%
Duke Energy Progress		36.6	%	38.1	%
Duke Energy Florida		38.5	%	39.1	%
Duke Energy Ohio		35.4	%	37.1	%
Duke Energy Indiana		36.8	%	37.5	%