Variable Interest Entities (Tables)

3 Months Ended

Mar. 31, 2013

Variable Interest Entity [Line Items]

Schedule of Variable Interest Entities [Table Text Block]

		March 31, 2013						December 31, 2012
		Exelon (a)(b)		Generation (b)		BGE		Exelon (a)(b)		Generation (b)		BGE
Current assets		$	551	$	491	$	52	$	550	$	519	$	30
Noncurrent assets			1,947		1,918		-		1,802		1,762		-
	Total assets	$	2,498	$	2,409	$	52	$	2,352	$	2,281	$	30
Current liabilities		$	575	$	492	$	76	$	685	$	613	$	71
Noncurrent liabilities			986		693		265		837		532		265
	Total liabilities	$	1,561	$	1,185	$	341	$	1,522	$	1,145	$	336

_______________________

• Includes certain purchase accounting adjustments not pushed down to the BGE standalone entity.
• Includes total assets of $116 million and total liabilities of $59 million as of March 31, 2013 and total asset of $116 million and total liabilities of $62 million as of December 31, 2012 related to deferred and accrued taxes that are not restricted for use by the consolidated VIEs that have recorded such assets and liabilities.

Schedule Of Unconsolidated Variable Interest Entities [Text Block]

				Equity
		Commercial		Method
		Agreement		Investment
March 31, 2013		VIEs		VIEs		Total
Total assets (a)		$	360	$	338	$	698
Total liabilities (a)			186		95		281
Registrants' ownership interest (a)			0		98		98
Other ownership interests (a)			174		145		319
Registrants' maximum exposure to loss:
	Letters of credit		1		0		1
	Carrying amount of equity method investments		0		78		78
	Contract intangible asset		8		0		8
	Debt and payment guarantees		0		5		5
	Net assets pledged for Zion Station decommissioning (b)		49		0		49
				Equity
		Commercial		Method
		Agreement		Investment
December 31, 2012		VIEs		VIEs		Total
Total assets (a)		$	386	$	354	$	740
Total liabilities (a)			219		114		333
Registrants' ownership interest (a)			0		97		97
Other ownership interests (a)			167		143		310
Registrants' maximum exposure to loss:
	Letters of credit		5		0		5
	Carrying amount of equity method investments		0		77		77
	Contract intangible asset		8		0		8
	Debt and payment guarantees		0		5		5
	Net assets pledged for Zion Station decommissioning (b)		50		0		50

• These items represent amounts on the unconsolidated VIE balance sheets, not on Exelon's or Generation's Consolidated Balance Sheets. These items are included to provide information regarding the relative size of the unconsolidated VIEs.
• These items represent amounts on Generation's and Exelon's Consolidated Balance Sheets related to the asset sale agreement with ZionSolutions, LLC. The net assets pledged for Zion Station decommissioning includes gross pledged assets of $580 million and $614 million as of March 31, 2013 and December 31, 2012, respectively; offset by payables to ZionSolutions LLC of $531 million and $564 million as of March 31, 2013 and December 31, 2012, respectively. These items are included to provide information regarding the relative size of the ZionSolutions LLC unconsolidated VIE.