Earnings Per Share and Equity (Tables)

6 Months Ended

Jun. 30, 2014

Earnings Per Share and Equity Tables [Abstract]

Reconciliation of basic and diluted earnings per share

			Three Months Ended June 30,				Six Months Ended June 30,
			2014		2013		2014		2013
Net income attributable to common shareholders		$	522	$	490	$	612	$	486
Average common shares outstanding — basic			860		856		860		856
Potentially dilutive effect of stock options, performance share awards,
	restricted stock, and Exelon's equity forward sales agreement		4		4		3		3
Average common shares outstanding — diluted			864		860		863		859