Earnings Per Share (Tables)

3 Months Ended

6 Months Ended

Jun. 30, 2013

Jun. 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 June 30, 2013
Income from continuing operations attributable to Duke Energy common shareholders, as adjusted for participating securities — basic and diluted	$	340		706	$	0.48
Three Months Ended June 30, 2012
Income from continuing operations attributable to Duke Energy common shareholders, as adjusted for participating securities — basic and diluted	$	444		446	$	0.99

(In millions, except per-share amounts)	Income		Average Shares			EPS
Six Months Ended June 30, 2013
Income from continuing operations attributable to Duke Energy common shareholders, as adjusted for participating securities — basic	$	969		705	$	1.37
Effect of dilutive securities:
Stock options, performance and restricted stock		―		1
Income from continuing operations attributable to Duke Energy common shareholders, as adjusted for participating securities — diluted	$	969		706	$	1.37
Six Months Ended June 30, 2012
Income from continuing operations attributable to Duke Energy common shareholders, as adjusted for participating securities — basic and diluted	$	736		446	$	1.65