CONSOLIDATED BALANCE SHEETS (Baltimore Gas and Electric Company) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current Assets
Cash and cash equivalents	$ 964.5	$ 2,028.5
Income taxes receivable, net	156.6	152.7
Fuel stocks	423.1	361.1
Materials and supplies	129.6	104.3
Regulatory assets (net)	153.7	78.7
Restricted cash-consolidated variable interest entity	44.8	52.3
Other	246.4	175.8
Total current assets	4,818.5	6,452.6
Deferred income taxes	132.0
Investments and Other Assets
Regulatory assets (net)	341.9	374.1
Other	380.5	284.5
Total investments and other noncurrent assets	3,690.8	4,287.1
Plant in service
Total plant in service	7,595.0	7,201.7
Total Assets	19,412.6	20,018.5
Current Liabilities
Current portion of long-term debt	109.6	245.6
Current portion of long-term debt-consolidated variable interest entity	65.3	59.7
Accounts payable	924.8	1,072.6
Deferred income taxes		56.5
Accrued taxes	90.4	71.0
Accrued expenses and other	431.4	358.1
Total current liabilities	3,287.8	3,277.2
Short-term borrowings		32.4
Deferred Credits and Other Liabilities
Deferred income taxes	2,305.1	2,489.8
Deferred investment tax credits	23.6	27.6
Other	251.7	296.0
Long-term Debt
6.20% deferrable interest subordinated debentures due October 15, 2043 to wholly owned BGE Capital Trust II relating to trust preferred securities	257.7	257.7
Current portion of long-term debt-consolidated variable interest entity	388.4	394.6
Total long-term debt	4,456.4	4,054.2
Equity
Common shareholder's equity	7,093.9	7,829.2
Preference stock not subject to mandatory redemption	190.0	190.0
Commitments, Guarantees, and Contingencies (see Note 12)
Total Liabilities and Equity	19,412.6	20,018.5
Baltimore Gas and Electric Company
Current Assets
Cash and cash equivalents	48.6	50.0
Accounts receivable (net of allowance for uncollectibles of $37.1 and $34.9, respectively)	323.0	351.4
Accounts receivable, unbilled (net of allowance for uncollectibles of $0.6 and $1.0, respectively)	193.9	268.8
Accounts receivable, affiliated companies	1.7	1.1
Income taxes receivable, net	21.2	55.9
Fuel stocks	73.8	66.5
Materials and supplies	33.5	31.2
Prepaid taxes other than income taxes	55.7	51.7
Regulatory assets (net)	153.7	78.7
Restricted cash-consolidated variable interest entity	29.7	29.5
Other	13.1	9.5
Total current assets	947.9	994.3
Investments and Other Assets
Regulatory assets (net)	341.9	374.1
Receivable, affiliated company	514.0	494.3
Other	53.0	52.2
Total investments and other noncurrent assets	908.9	920.6
Plant in service
Electric	5,483.0	5,127.9
Gas	1,386.9	1,323.0
Common	414.6	507.8
Total plant in service	7,284.5	6,958.7
Accumulated depreciation	(2,464.8)	(2,449.3)
Net plant in service	4,819.7	4,509.4
Construction work in progress	298.4	232.9
Plant held for future use	12.1	10.1
Net utility plant	5,130.2	4,752.4
Total Assets	6,987.0	6,667.3
Current Liabilities
Current portion of long-term debt	109.5	22.0
Current portion of long-term debt-consolidated variable interest entity	63.0	59.7
Accounts payable	209.6	252.9
Accounts payable, affiliated companies	66.1	84.9
Customer deposits	84.0	78.9
Deferred income taxes	59.0	30.1
Accrued taxes	15.9	19.0
Accrued interest	40.8	41.4
Liability for uncertain tax positions	10.4	62.8
Accrued expenses and other	81.3	58.3
Total current liabilities	739.6	710.0
Deferred Credits and Other Liabilities
Deferred income taxes	1,484.2	1,354.9
Payable, affiliated company	253.0	250.8
Deferred investment tax credits	7.7	8.4
Other	15.9	20.1
Total deferred credits and other liabilities	1,760.8	1,634.2
Long-term Debt
Rate stabilization bonds-consolidated variable interest entity	394.6	454.4
Other long-term debt	1,709.6	1,431.5
6.20% deferrable interest subordinated debentures due October 15, 2043 to wholly owned BGE Capital Trust II relating to trust preferred securities	257.7	257.7
Unamortized discount and premium	(3.5)	(2.0)
Current portion of long-term debt	(109.5)	(22.0)
Current portion of long-term debt-consolidated variable interest entity	(63.0)	(59.7)
Total long-term debt	2,185.9	2,059.9
Equity
Common shareholder's equity	2,110.7	2,073.2
Preference stock not subject to mandatory redemption	190.0	190.0
Total equity	2,300.7	2,263.2
Commitments, Guarantees, and Contingencies (see Note 12)
Total Liabilities and Equity	$ 6,987.0	$ 6,667.3