Regulatory Matters (Tables)

9 Months Ended

Sep. 30, 2012

Regulatory Matters Tables [Abstract]

September 30, 2012		Exelon				ComEd				PECO					BGE

Regulatory assets		Current		Noncurrent		Current		Noncurrent		Current			Noncurrent		Current		Noncurrent
Pension and other postretirement
	benefits(a)	$	264	$	3,499	$	0	$	0	$	2		$	0	$	1	$	0
Deferred income taxes			13		1,346		5		62		0			1,220		8		64
AMI and smart meter programs			2		54		2		5		0			24		0		25
Under-recovered distribution service
	costs		0		119		0		119		0			0		0		0
Debt costs			14		71		11		65		3			6		2		9
Fair value of BGE long-term debt (b)			43		226		0		0		0			0		0		0
Fair value of BGE supply contract (c)			94		31		0		0		0			0		0		0
Severance			30		36		25		19		0			0		5		17
Asset retirement obligations			0		84		0		59		0			25		0		0
MGP remediation costs			65		227		58		190		6			35		1		2
RTO start-up costs			3		3		3		3		0			0		0		0
Under-recovered electric universal
	service fund costs		8		0		0		0		8			0		0		0
Financial swap with Generation			0		0		352		0		0			0		0		0
Renewable energy and associated
	RECs		17		53		17		53		0			0		0		0
Under-recovered energy and
	transmission costs		62		0		22		0		7	(d)		0		33		0
DSP Program costs			2		2		0		0		2			2		0		0
DSP II Program costs			0		2		0		0		0			2		0		0
Deferred storm costs			3		7		0		0		0			0		3		7
Electric generation-related
	regulatory asset		16		44		0		0		0			0		16		44
Rate stabilization deferral			65		244		0		0		0			0		65		244
Energy efficiency and demand
	response programs		55		117		0		0		0			0		55		117
Other			30		27		16		14		14			9		0		5

Total regulatory assets		$	786		6,192	$	511	$	589	$	42		$	1,323	$	189	$	534

September 30, 2012		Exelon				ComEd				PECO					BGE

Regulatory liabilities		Current		Noncurrent		Current		Noncurrent		Current			Noncurrent		Current		Noncurrent
Nuclear decommissioning		$	0	$	2,383	$	0	$	2,021	$	0		$	362	$	0	$	0
Removal costs			94		1,397		73		1,185		0			0		21		212
Energy efficiency and demand
	response programs		82		33		37		0		45			33		0		0
Electric distribution tax repairs			18		138		0		0		18			138		0		0
Gas distribution tax repairs			5		49						5			49
Over-recovered distribution service
	costs		45		0		45		0		0			0		0		0
Over-recovered uncollectible
	accounts		10		0		10		0		0			0		0		0
Over-recovered energy and
	transmission costs		39		0		7		0		32	(e)		0		0		0
Over-recovered gas universal
	service fund costs		3		0		0		0		3			0		0		0
Over-recovered AEPS costs			1		0		0		0		1			0		0		0
Customer rate credit			1		0		0		0		0			0		1		0
Other			1		0		0		0		1			0		0		0

Total regulatory liabilities		$	299	$	4,000	$	172	$	3,206	$	105		$	582	$	22	$	212

December 31, 2011		Exelon				ComEd				PECO					BGE

Regulatory assets		Current		Noncurrent		Current		Noncurrent		Current			Noncurrent		Current		Noncurrent
Pension and other postretirement
	benefits	$	204	$	2,794	$	0	$	0	$	7		$	0	$	3	$	0
Deferred income taxes			5		1,176		5		66		0			1,110		7		64
AMI and smart meter programs			2		28		2		6		0			22		0		15
Under-recovered distribution service
	costs		14		70		14		70		0			0		0		0
Debt costs			18		81		15		73		3			8		2		10
Severance			25		38		25		38		0			0		0		1
Asset retirement obligations			0		74		0		50		0			24		0		0
MGP remediation costs			30		129		24		91		6			38		1		2
RTO start-up costs			3		4		3		4		0			0		0		0
Under-recovered electric universal
	service fund costs		3		0		0		0		3			0		0		0
Financial swap with Generation			0		0		503		191		0			0		0		0
Renewable energy and associated
	RECs		9		97		9		97		0			0		0		0
Under-recovered energy and
	transmission costs		57		0		48		0		9	(d)		0		50		0
DSP Program costs			3		2		0		0		3			2		0		0
Deferred storm costs			0		0		0		0		0			0		3		9
Electric generation-related
	regulatory asset		0		0		0		0		0			0		16		56
Rate stabilization deferral			0		0		0		0		0			0		63		295
Energy efficiency and demand
	response programs		0		0		0		0		0			0		29		95
Other			17		25		9		13		8			12		0		3

Total regulatory assets		$	390	$	4,518	$	657	$	699	$	39		$	1,216	$	174	$	550

December 31, 2011		Exelon				ComEd				PECO					BGE

Regulatory liabilities		Current		Noncurrent		Current		Noncurrent		Current			Noncurrent		Current		Noncurrent
Nuclear decommissioning		$	0	$	2,222	$	0	$	1,857	$	0		$	365	$	0	$	0
Removal costs			61		1,185		61		1,185		0			0		18		200
Energy efficiency and demand
	response programs		49		69		49		0		0			69		0		0
Electric distribution tax repairs			19		151		0		0		19			151		0		0
Over-recovered uncollectible
	accounts		15		0		15		0		0			0		0		0
Over-recovered energy and
	transmission costs		42		0		12		0		30	(e)		0		0		0
Over-recovered gas universal
	service fund costs		3		0		0		0		3			0		0		0
Over-recovered AEPS costs			8		0		0		0		8			0		0		0

Total regulatory liabilities		$	197	$	3,627	$	137	$	3,042	$	60		$	585	$	18	$	200

As of September 30, 2012, pension and other postretirement benefit regulatory assets include a regulatory asset established at the date of the merger related to the recognition of BGE's share of the underfunded status of the defined benefit postretirement plan as a liability on Exelon's Consolidated Balance Sheets. The regulatory asset is being amortized in accordance with the authoritative guidance for pensions and postretirement benefits over a period of approximately 12 years. BGE is currently recovering these costs through base rates. BGE is not earning a return on the recovery of these costs in base rates.
Represents the regulatory asset recorded at Exelon Corporate for the difference in the fair value of the long-term debt of BGE as of the merger date.
Represents the regulatory asset recorded at Exelon Corporate representing the fair value of BGE's supply contracts as of the close of the merger date. BGE is allowed full recovery of the costs of its electric and gas supply contracts through approved, regulated rates.
Includes $5 million related to under-recovered electric transmission costs and $2 million related to under-recovered natural gas costs under the PGC as of September 30, 2012. The balance as of December 31, 2011 related to under-recovered electric transmission costs.
Relates to the over-recovered electric supply costs under the GSA as of September 30, 2012. Includes $5 million related to the over-recovered natural gas costs under the PGC and $25 million related to the over-recovered electric supply costs under the GSA as of December 31, 2011.

As of September 30, 2012	Exelon		ComEd		PECO		BGE
Purchased receivables (a)	$	203	$	56	$	72	$	75
Allowance for uncollectible accounts (b)		(18)		(6)		(7)		(5)
Purchased receivables, net	$	185	$	50	$	65	$	70

As of December 31, 2011	Exelon		ComEd		PECO		BGE
Purchased receivables (a)	$	68	$	16	$	52	$	61
Allowance for uncollectible accounts (b)		(5)		-		(5)		(3)
Purchased receivables, net	$	63	$	16	$	47	$	58

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(a) PECO's gas POR program became effective on January 1, 2012 and includes a 1% discount on purchased receivables in order to recover the implementation costs of the program. If the costs are not fully recovered when PECO files its next gas distribution rate case, PECO will propose a mechanism to recover the remaining implementation costs as a distribution charge to low volume transportation customers or apply future discounts on purchased receivables from natural gas suppliers serving those customers.

(b) For ComEd and BGE, reflects the incremental allowance for uncollectible accounts recorded, which is in addition to the purchase discount. For ComEd, the incremental uncollectible accounts expense is recovered through its Purchase of Receivables with Consolidated Billing (PORCB) tariff.