CONSOLIDATED STATEMENTS OF INCOME (Baltimore Gas and Electric Company) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenues
Electric revenues	$ 2,320.7	$ 2,752.1	$ 2,820.7
Gas revenues	664.5	704.9	753.8
Total revenues	13,758.2	14,340.0	15,598.8
Operating expenses
Merger costs	117.9		145.8
Impairment losses and other costs	891.0	2,476.8	124.7
Depreciation and amortization	589.3	519.5	651.4
Total expenses	14,126.1	15,853.8	14,588.5
(Loss) Income from Operations	(197.0)	(1,243.0)	7,981.0
Other Income	(75.3)	(76.7)	(140.7)
Fixed Charges
Interest expense	276.6	310.8	437.2
Total fixed charges	265.4	277.8	350.1
Income Before Income Taxes	(537.7)	(1,597.5)	7,490.2
Income Taxes
Current	(32.8)	55.1	1,151.9
Deferred	(193.7)	(716.3)	1,847.0
Total income taxes	(230.9)	(665.7)	2,986.8
Net (Loss) Income Attributable to Common Stock	(340.3)	(982.6)	4,443.4
Baltimore Gas and Electric Company
Revenues
Electric revenues	2,321.4	2,752.3	2,820.7
Gas revenues	671.7	709.4	758.3
Total revenues	2,993.1	3,461.7	3,579.0
Operating expenses
Electricity purchased for resale	836.5	1,252.9	1,217.4
Electricity purchased for resale from affiliate	348.2	428.0	623.5
Gas purchased for resale	334.2	387.5	449.9
Operations and maintenance	551.5	484.5	433.7
Operations and maintenance from affiliate	115.3	121.6	126.2
Merger costs	30.3
Impairment losses and other costs			20.0
Depreciation and amortization	272.1	249.2	262.1
Taxes other than income taxes	190.2	183.8	177.8
Total expenses	2,678.3	3,107.5	3,310.6
(Loss) Income from Operations	314.8	354.2	268.4
Other Income	21.0	20.8	25.4
Fixed Charges
Interest expense	133.8	135.8	143.6
Allowance for borrowed funds used during construction	(7.2)	(5.5)	(4.3)
Total fixed charges	126.6	130.3	139.3
Income Before Income Taxes	209.2	244.7	154.5
Income Taxes
Current	(71.3)	(202.0)	(119.8)
Deferred	145.8	300.2	184.7
Investment tax credit adjustments	(1.0)	(1.1)	(1.1)
Total income taxes	73.5	97.1	63.8
Net Income	135.7	147.6	90.7
Preference Stock Dividends	13.2	13.2	13.2
Net Income Attributable to Common Stock before Noncontrolling Interests	122.5	134.4	77.5
Net Loss Attributable to Noncontrolling Interests			7.3
Net (Loss) Income Attributable to Common Stock	$ 122.5	$ 134.4	$ 84.8