Common Stock (Tables)

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Schedule Of Earnings Per Share

The following table presents Duke Energy’s basic and diluted EPS calculations and reconciles the weighted average number of common stock outstanding to the diluted weighted average number of common stock outstanding.

	Years Ended December 31,
(in millions, except per share amounts)	2015		2014		2013
Income from continuing operations attributable to Duke Energy common stockholders excluding impact of participating securities	$	2,791	$	2,446	$	2,565
Weighted average shares outstanding – basic	694		707		706
Weighted average shares outstanding – diluted	694		707		706
Earnings per share from continuing operations attributable to Duke Energy common stockholders
Basic	$	4.02	3.46		3.64
Diluted	$	4.02	3.46		3.63
Potentially dilutive items excluded from the calculation(a)	2		2		2
Dividends declared per common share	$	3.24	3.15		3.09

(a) Performance stock awards and certain stock options were not included in the dilutive securities calculation because either the performance measures related to the awards had not been met or the option exercise prices were greater than the average market price of the common shares during the presented periods.