Related Party Transactions (Tables)

6 Months Ended

Jun. 30, 2013

Schedule Of Related Party Transactions By Related Party Tables [Line Items]

Schedule Of Income Loss From Equity Method Investments [Text Block]

	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)

Exelon Generation Co L L C [Member]

Schedule Of Related Party Transactions By Related Party Tables [Line Items]

Schedule Of Income Loss From Equity Method Investments [Text Block]

	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)