Investment in Constellation Energy Nuclear Group, LLC (Tables)

6 Months Ended

Jun. 30, 2013

Equity Method Investments and Joint Ventures Tables [Line Items]

Schedule of total equity in earnings of investment in CENG

	Three Months			Three Months
	Ended June 30,			Ended June 30,
	2013		2012
Equity investment income	$	11	$	4
Amortization of basis difference in CENG		(30)		(62)
Total equity in losses - CENG	$	(19)	$	(58)
	Six Months			For the Period March 12,
	Ended June 30,			through June 30,
	2013		2012
Equity investment income (loss)	$	26	$	(5)
Amortization of basis difference in CENG		(57)		(74)
Total equity in losses - CENG	$	(31)	$	(79)

Schedule of summarized income statement information for CENG

	Income/(Expense)		Income/(Expense)			Accounts
	Three Months		Six Months		Income	Receivable/
	Ended		Ended		Statement	(Accounts Payable)
Agreement	June 30, 2013		June 30, 2013		Classification	At June 30, 2013
PPA	$	(231)	$	(479)	Purchased power and fuel	$	(91)
PSAA		1		2	Operating revenues		-
SSA		11		22	Operating revenues		4
	Income/(Expense)		Income/(Expense)			Accounts
	Three Months		For the Period		Income	Receivable/
	Ended		March 12 through		Statement	(Accounts Payable)
Agreement	June 30, 2012		June 30, 2012		Classification	At June 30, 2012
PPA	$	(216)	$	(251)	Purchased power and fuel	$	(90)
PSAA		2		2	Operating revenues		-
SSA		12		15	Operating revenues		4

Exelon Generation Co L L C [Member]

Equity Method Investments and Joint Ventures Tables [Line Items]

Schedule of total equity in earnings of investment in CENG

	Three Months			Three Months
	Ended June 30,			Ended June 30,
	2013		2012
Equity investment income	$	11	$	4
Amortization of basis difference in CENG		(30)		(62)
Total equity in losses - CENG	$	(19)	$	(58)
	Six Months			For the Period March 12,
	Ended June 30,			through June 30,
	2013		2012
Equity investment income (loss)	$	26	$	(5)
Amortization of basis difference in CENG		(57)		(74)
Total equity in losses - CENG	$	(31)	$	(79)

Schedule of summarized income statement information for CENG

	Income/(Expense)		Income/(Expense)			Accounts
	Three Months		Six Months		Income	Receivable/
	Ended		Ended		Statement	(Accounts Payable)
Agreement	June 30, 2013		June 30, 2013		Classification	At June 30, 2013
PPA	$	(231)	$	(479)	Purchased power and fuel	$	(91)
PSAA		1		2	Operating revenues		-
SSA		11		22	Operating revenues		4
	Income/(Expense)		Income/(Expense)			Accounts
	Three Months		For the Period		Income	Receivable/
	Ended		March 12 through		Statement	(Accounts Payable)
Agreement	June 30, 2012		June 30, 2012		Classification	At June 30, 2012
PPA	$	(216)	$	(251)	Purchased power and fuel	$	(90)
PSAA		2		2	Operating revenues		-
SSA		12		15	Operating revenues		4