Earnings Per Share (Tables)

3 Months Ended

9 Months Ended

Sep. 30, 2013

Sep. 30, 2013

Earnings Per Share [Line Items]

Schedule Of Earnings Per Share

(In millions, except per-share amounts)	Income		Average Shares			EPS
Three Months Ended September 30, 2013
Income from continuing operations attributable to Duke Energy common shareholders, as adjusted for participating securities — basic and diluted	$	989		706	$	1.40
Three Months Ended September 30, 2012
Income from continuing operations attributable to Duke Energy common shareholders, as adjusted for participating securities — basic and diluted	$	589		699	$	0.84

(In millions, except per-share amounts)	Income		Average Shares			EPS
Nine Months Ended September 30, 2013
Income from continuing operations attributable to Duke Energy common shareholders, as adjusted for participating securities — basic and diluted	$	1,959		706	$	2.78
Nine Months Ended September 30, 2012
Income from continuing operations attributable to Duke Energy common shareholders, as adjusted for participating securities — basic and diluted	$	1,326		531	$	2.50