Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2011

Quarterly Financial Data (Unaudited)

Schedule of Quarterly Financial Data (Unaudited)

2011 Quarterly Data—Constellation Energy																				2011 Quarterly Data—BGE
	Revenues *		Fuel and Purchased Energy Expenses (includes amounts from affiliates) *		(Loss) Income from Operations			Net Income (Loss)			Net Income (Loss) Attributable to Common Stock			Earnings (Loss) Per Share from Operations— Diluted			Earnings (Loss) Per Share of Common Stock— Diluted				Revenues		Income from Operations		Net Income		Net Income (Loss) Attributable to Common Stock
		(In millions, except per share amounts)																				(In millions)
Quarter Ended																				Quarter Ended
March 31	$	3,570.2	$	2,673.0	$	217.6		$	79.4		$	70.4		$	0.35		$	0.35		March 31	$	957.5	$	153.4	$	81.1	$	77.8
June 30		3,359.8		2,380.9		260.1			108.1			99.2			0.49			0.49		June 30		656.2		52.7		16.6		13.3
September 30		3,875.4		2,984.6		229.8			97.9			73.7			0.36			0.36		September 30		722.9		22.8		1.6		(1.7	)
December 31		2,952.8		2,246.5		(904.5	)		(592.2	)		(583.6	)		(2.91	)		(2.91	)	December 31		656.5		85.9		36.4		33.1
Year Ended																				Year Ended
December 31	$	13,758.2	$	10,285.0	$	(197.0	)	$	(306.8	)	$	(340.3	)	$	(1.70	)	$	(1.70	)	December 31	$	2,993.1	$	314.8	$	135.7	$	122.5

2010 Quarterly Data—Constellation Energy
									Net Income (Loss) Attributable to Common Stock									2010 Quarterly Data—BGE
	Revenues		Income (Loss) from Operations			Net Income (Loss)						Earnings (Loss) Per Share from Operations— Diluted			Earnings (Loss) Per Share of Common Stock— Diluted				Revenues		Income from Operations		Net Income		Net Income Attributable to Common Stock
	(In millions, except per share amounts)																		(In millions)
Quarter Ended																		Quarter Ended
March 31	$	3,586.6	$	415.1		$	191.3		$	191.5		$	0.95		$	0.95		March 31	$	1,069.3	$	136.9	$	64.4	$	61.1
June 30		3,309.9		181.9			83.8			72.6			0.36			0.36		June 30		751.5		55.9		17.0		13.7
September 30		3,968.9		(2,246.7	)		(1,375.0	)		(1,406.5	)		(6.99	)		(6.99	)	September 30		856.1		75.6		31.8		28.5
December 31		3,474.6		406.7			168.1			159.8			0.79			0.79		December 31		784.8		85.8		34.4		31.1
Year Ended																		Year Ended
December 31	$	14,340.0	$	(1,243.0	)	$	(931.8	)	$	(982.6	)	$	(4.90	)	$	(4.90	)	December 31	$	3,461.7	$	354.2	$	147.6	$	134.4