Common Stock (Tables)

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Earnings Per Share [Line Items]

Schedule Of Earnings Per Share

(In millions, except per-share amounts)	Income		Average Shares		EPS
2013
Income from continuing operations attributable to Duke Energy common shareholders, as adjusted for participating securities — basic and diluted	$	2,640		706	$	3.74

2012
Income from continuing operations attributable to Duke Energy common shareholders, as adjusted for participating securities — basic	$	1,727	574	$	3.01
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	$	1,727	575	$	3.01

2011
Income from continuing operations attributable to Duke Energy common shareholders, as adjusted for participating securities — basic and diluted	$	1,702	444	$	3.83