Earnings Per Share and Equity (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Reconciliation of basic and diluted earnings per share

The following table sets forth the components of basic and diluted earnings per share and shows the effect of these stock options, performance share awards and restricted stock awards on the weighted average number of shares outstanding used in calculating diluted earnings per share:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Exelon
Net income attributable to common shareholders	$	733	$	823	$	1,858	$	1,907
Weighted average common shares outstanding — basic	968		962		967		941
Assumed exercise and/or distributions of stock-based awards	2		3		2		2
Weighted average common shares outstanding — diluted	970		965		969		943