Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2012

Dec. 31, 2011

Progress Energy [Member]

Schedule Of Earnings Per Share

			Average
(In millions, except per-share amounts)	Income		Shares		EPS
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
2010
Income from continuing operations attributable to Duke Energy common shareholders, as adjusted for participating securities — basic	$	1,315		439	$	2.99
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	$	1,315		440	$	2.99

Progress Energy
	The following tables represent Progress Energy’s earnings per common share for the years ended December 31, 2011 and 2010,
respectively.
				Average
(In millions, except per-share amounts)		Income		Shares		EPS
2011
Income from continuing operations attributable to Progress Energy common shareholders, as adjusted for participating securities — basic and diluted		$	580		296	$	1.96
2010
Income from continuing operations attributable to Progress Energy common shareholders, as adjusted for participating securities — basic and diluted		$	860		291	$	2.96