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Regulatory Matters (Tables)

3 Months Ended

Mar. 31, 2012

Regulatory Matters Tables [Abstract]

March 31, 2012		Exelon				ComEd				PECO					BGE

Regulatory assets		Current		Noncurrent		Current		Noncurrent		Current			Noncurrent		Current		Noncurrent
Pension and other postretirement
	benefits(a)	$	265	$	3,512	$	0	$	0	$	5		$	0	$	2	$	0
Deferred income taxes			12		1,243		5		64		0			1,115		7		64
AMI and smart meter programs			2		46		2		6		0			22		0		18
Under-recovered distribution service
	costs		19		99		19		99		0			0		0		0
Debt costs			15		78		12		70		3			8		2		10
Fair value of BGE long-term debt (b)			41		253		0		0		0			0		0		0
Fair value of BGE supply contract (c)			117		89		0		0		0			0		0		0
Severance			28		44		25		31		0			0		3		13
Asset retirement obligations			0		76		0		52		0			24		0		0
MGP remediation costs			31		124		24		85		6			37		1		2
RTO start-up costs			3		3		3		3		0			0		0		0
Under-recovered electric universal
	service fund costs		5		0		0		0		5			0		0		0
Financial swap with Generation			0		0		590		92		0			0		0		0
Renewable energy and associated
	RECs		16		125		16		125		0			0		0		0
Under-recovered energy and
	transmission costs		139		0		85		0		9	(d)		0		45		0
DSP Program costs			3		2		0		0		3			2		0		0
Deferred storm costs			3		8		0		0		0			0		3		8
Electric generation-related
	regulatory asset		16		52		0		0		0			0		16		52
Rate stabilization deferral			63		282		0		0		0			0		63		282
Energy efficiency and demand
	response programs		29		100		0		0		0			0		29		100
Other			39		32		12		17		17			9		3		4

Total regulatory assets		$	846		6,168	$	793	$	644	$	48		$	1,217	$	174	$	553

Regulatory liabilities
Nuclear decommissioning		$	0	$	2,430	$	0	$	2,017	$	0		$	413	$	0	$	0
Removal costs			86		1,396		64		1,191		0			0		22		205
Energy efficiency and demand
	response programs		42		79		42		0		0			79		0		0
Electric distribution tax repairs			20		145		0		0		20			145		0		0
Over-recovered uncollectible
	accounts		10		0		10		0		0			0		0		0
Over-recovered energy and
	transmission costs		55		0		11		0		44	(e)		0		0		0
Over-recovered gas universal
	service fund costs		3		0		0		0		3			0		0		0
Over-recovered AEPS costs			6		0		0		0		6			0		0		0
Customer rate credit			113		0		0		0		0			0		113		0

Total regulatory liabilities		$	335	$	4,050	$	127	$	3,208	$	73		$	637	$	135	$	205

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 uncollectible
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	(b)		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

Regulatory liabilities
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	(c)		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 March 31, 2012, the pensions and other postretirement benefits line now includes 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 balance sheet. The regulatory asset is amortized in proportion to the recognition of prior service costs (gains), transition obligations, and actuarial losses attributable to BGE's share of the postretirement plans determined by the cost recognition provisions of the authoritative guidance for pensions and postretirement benefitsaccordance 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.
Relates to the under-recovered transmission costs.
Includes $18 million and $5 million related to the over-recovered natural gas costs under the PGC and $26 million and $25 million related to the over-recovered electric supply costs under the GSA as of March 31, 2012 and December 31, 2011, respectively.

As of March 31, 2012, the pensions and other postretirement benefits line now includes 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 balance sheet. The regulatory asset is amortized in proportion to the recognition of prior service costs (gains), transition obligations, and actuarial losses attributable to BGE's share of the postretirement plans determined by the cost recognition provisions of the authoritative guidance for pensions and postretirement benefitsaccordance 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.
Relates to the under-recovered transmission costs.
Includes $18 million and $5 million related to the over-recovered natural gas costs under the PGC and $26 million and $25 million related to the over-recovered electric supply costs under the GSA as of March 31, 2012 and December 31, 2011, respectively.

As of March 31, 2012	Exelon		ComEd		PECO		BGE
Purchased receivables (a)	$	146	$	20	$	57	$	69
Allowance for uncollectible accounts (b)		(13)		(3)		(6)		(4)
Purchased receivables, net	$	133	$	17	$	51	$	65

As of December 31, 2011	Exelon (c)		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

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.

__________

(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.