Quarterly Data (Exelon, Generation, ComEd and PECO)

12 Months Ended

Dec. 31, 2011

Selected Quarterly Financial Information [Abstract]

Quarterly Financial Information Text Block

22. Quarterly Data (Unaudited) (Exelon, Generation, ComEd and PECO)

Exelon

The data shown below, which may not equal the total for the year due to the effects of rounding and dilution, includes all adjustments that Exelon considers necessary for a fair presentation of such amounts:

	Operating Revenues				Operating Income				Net Income
	2011		2010		2011		2010		2011		2010
Quarter ended:
March 31	$	5,052	$	4,461	$	1,202	$	1,402	$	668	$	749
June 30		4,587		4,398		1,034		1,018		620		445
September 30		5,295		5,291		1,181		1,367		601		845
December 31		3,991		4,494		1,062		939		606		524

	Average Basic Shares
	Outstanding				Net Income
	(in millions)				per Basic Share
	2011		2010		2011		2010
Quarter ended:
March 31		662		661	$	1.01	$	1.13
June 30		663		661		0.93		0.67
September 30		663		662		0.91		1.28
December 31		664		662		0.91		0.79
	Average Diluted Shares
	Outstanding				Net Income
	(in millions)				per Diluted Share
	2011		2010		2011		2010
Quarter ended:
March 31		664		662	$	1.01	$	1.13
June 30		664		662		0.93		0.67
September 30		665		663		0.90		1.27
December 31		666		663		0.91		0.79

The following table presents the New York Stock Exchange—Composite Common Stock Prices and dividends by quarter on a per share basis:

	2011									2010
	Fourth			Third		Second		First		Fourth		Third		Second		First
	Quarter			Quarter		Quarter		Quarter		Quarter		Quarter		Quarter		Quarter
High price	$	45.45		$	45.27	$	42.89	$	43.58	$	44.49	$	43.32	$	45.10	$	49.88
Low price		39.93			39.51		39.53		39.06		39.05		37.63		37.24		42.97
Close		43.37			42.61		42.84		41.24		41.64		42.58		37.97		43.81
Dividends		0.525	(a)		0.525		0.525		0.525		0.525		0.525		0.525		0.525

_____________________

(a)       The fourth quarter 2011 dividend does not include the first quarter 2012 regular quarterly dividend of $0.525 per share, declared by the Exelon Board of Directors on October 25, 2011. The first quarter 2012 dividend is payable on March 9, 2012, to shareholders of record of Exelon at the end of the day on February 15, 2012.

Generation

The data shown below includes all adjustments that Generation considers necessary for a fair presentation of such amounts:

	Operating Revenues				Operating Income				Net Income
	2011		2010		2011		2010		2011		2010
Quarter ended:
March 31	$	2,739	$	2,421	$	801	$	916	$	495	$	561
June 30		2,546		2,353		647		587		443		382
September 30		2,862		2,655		754		883		386		605
December 31		2,161		2,596		673		660		446		424

ComEd

The data shown below includes all adjustments that ComEd considers necessary for a fair presentation of such amounts:

	Operating Revenues				Operating Income				Net Income
	2011		2010		2011		2010		2011		2010
Quarter ended:
March 31	$	1,466	$	1,415	$	200	$	291	$	69	$	116
June 30		1,444		1,499		254		256		114		9
September 30		1,784		1,918		243		280		112		121
December 31		1,362		1,372		285		229		121		91

PECO

The data shown below includes all adjustments that PECO considers necessary for a fair presentation of such amounts:

									Net Income
									on Common
	Operating Revenues				Operating Income				Stock
	2011		2010		2011		2010		2011		2010
Quarter ended:
March 31	$	1,153	$	1,455	$	210	$	194	$	125	$	100
June 30		842		1,269		161		182		82		74
September 30		946		1,469		153		215		104		126
December 31		778		1,299		131		70		73		20