Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2015

Public Utilities General Disclosures [Table Text Block]

For each of the following years, the ICC approved the following total increases/(decreases) in ComEd's electric distributions formula rate filings:



Annual Distribution Filings	2015				2014				2013
ComEd's requested total revenue requirement (decrease) increase	$	(50	)		$	269			$	353

Final ICC Order
Initial revenue requirement increase	$	85			$	160			$	160
Annual reconciliation (decrease) increase	(152		)		72				181
Total revenue requirement (decrease) increase	$	(67	)		$	232			$	341

Allowed Return on Rate Base:
Initial revenue requirement	7.05		%		7.06		%		6.94		%
Annual reconciliation	7.02		%		7.04		%		6.94		%
Allowed ROE:
Initial revenue requirement	9.14		%	^(a)	9.25		%	^(a)	8.72		%
Annual reconciliation	9.09		%	^(a)	9.20		%	^(a)	8.72		%

Effective date of rates	January 2016				January 2015				January 2014

__________________

(a) Includes a reduction of 5 basis points for a reliability performance metric penalty.

For each of the following years, the following total increases/(decreases) were included in ComEd's and BGE's electric transmission formula rate filings:



	ComEd									BGE
Annual Transmission Filings	2015			2014			2013			2015			2014			2013
Initial revenue requirement increase ^(a)	$	68		$	36		$	38		$	—		$	9		$	2
Annual reconciliation (decrease) increase	18			(14		)	30			(3		)	5			(3		)
Total revenue requirement increase	$	86		$	22		$	68		$	(3	)	$	14		$	(1	)

Allowed return on rate base ^(b)	8.61		%	8.62		%	8.7		%	8.46		%	8.53		%	8.35		%
Allowed ROE	11.5		%	11.5		%	11.5		%	11.3		%	11.3		%	11.3		%

Effective date of rates ^(c)	June 2015			June 2014			June 2013			June 2015			June 2014			June 2013

_____________

(a) For BGE, this excludes the increase in revenue requirement associated with dedicated facilities charges. The increases for dedicated facilities were $13 million and $3 million for 2015 and 2014, respectively. There were no dedicated facilities charges in 2013 for BGE.

(b)

Refers to the weighted average debt and equity return on transmission rate bases for ComEd and BGE. As part of the FERC-approved settlement of ComEd’s 2007 transmission rate case, the rate of return on common equity is 11.50% and the common equity component of the ratio used to calculate the weighted average debt and equity return for the transmission formula rate is currently capped at 55%. As part of the FERC-approved settlement of BGE's 2005 transmission rate case, the rate of return on common equity is 11.30%, inclusive of a 50 basis point incentive for participating in PJM.

(c) The time period for any challenges to the annual transmission formula rate update filings expired with no challenges submitted.

Regulatory Construction Commitment

ComEd, PECO and BGE will work with PJM to continue to evaluate the scope and timing of any required construction projects. ComEd, PECO and BGE’s estimated commitments are as follows:



	Total		2016		2017		2018		2019		2020
ComEd	$	297	$	204	$	61	$	26	$	6	$	—
PECO	67		31		24		8		4		—
BGE	373		140		112		62		46		13

Schedule of Regulatory Assets



December 31, 2015	Exelon		ComEd		PECO		BGE
Regulatory assets
Pension and other postretirement benefits	$	3,156	$	—	$	—	$	—
Deferred income taxes	1,616		64		1,473		79
AMI programs	399		140		63		196
Under-recovered distribution service costs	189		189		—		—
Debt costs	47		46		1		8
Fair value of BGE long-term debt	162		—		—		—
Severance	9		—		—		9
Asset retirement obligations	108		67		22		19
MGP remediation costs	286		255		30		1
Under-recovered uncollectible accounts	52		52		—		—
Renewable energy	247		247		—		—
Energy and transmission programs	84		43		1		40
Deferred storm costs	2		—		—		2
Electric generation-related regulatory asset	20		—		—		20
Rate stabilization deferral	87		—		—		87
Energy efficiency and demand response programs	279		—		1		278
Merger integration costs	6		—		—		6
Conservation voltage reduction	3		—		—		3
Under-recovered revenue decoupling	30		—		—		30
CAP arrearage	7		—		7		—
Other	35		10		19		3
Total regulatory assets	6,824		1,113		1,617		781
Less: current portion	759		218		34		267
Total noncurrent regulatory assets	$	6,065	$	895	$	1,583	$	514

The following tables provide information about the regulatory assets and liabilities of Exelon, ComEd, PECO and BGE as of December 31, 2015 and 2014.



December 31, 2015	Exelon		ComEd		PECO		BGE
Regulatory assets
Pension and other postretirement benefits	$	3,156	$	—	$	—	$	—
Deferred income taxes	1,616		64		1,473		79
AMI programs	399		140		63		196
Under-recovered distribution service costs	189		189		—		—
Debt costs	47		46		1		8
Fair value of BGE long-term debt	162		—		—		—
Severance	9		—		—		9
Asset retirement obligations	108		67		22		19
MGP remediation costs	286		255		30		1
Under-recovered uncollectible accounts	52		52		—		—
Renewable energy	247		247		—		—
Energy and transmission programs	84		43		1		40
Deferred storm costs	2		—		—		2
Electric generation-related regulatory asset	20		—		—		20
Rate stabilization deferral	87		—		—		87
Energy efficiency and demand response programs	279		—		1		278
Merger integration costs	6		—		—		6
Conservation voltage reduction	3		—		—		3
Under-recovered revenue decoupling	30		—		—		30
CAP arrearage	7		—		7		—
Other	35		10		19		3
Total regulatory assets	6,824		1,113		1,617		781
Less: current portion	759		218		34		267
Total noncurrent regulatory assets	$	6,065	$	895	$	1,583	$	514

Schedule of Regulatory Liabilities



December 31, 2015	Exelon		ComEd		PECO		BGE
Regulatory liabilities
Other postretirement benefits	$	94	$	—	$	—	$	—
Nuclear decommissioning	2,577		2,172		405		—
Removal costs	1,527		1,332		—		195
Energy efficiency and demand response programs	92		52		40		—
DLC program costs	9		—		9		—
Electric distribution tax repairs	95		—		95		—
Gas distribution tax repairs	28		—		28		—
Energy and transmission programs	131		53		60		18
Over-recovered revenue decoupling	1		—		—		1
Other	16		5		2		8
Total regulatory liabilities	4,570		3,614		639		222
Less: current portion	369		155		112		38
Total noncurrent regulatory liabilities	$	4,201	$	3,459	$	527	$	184

Purchase Of Receivables

The following tables provide information about the purchased receivables of the Registrants as of December 31, 2015 and 2014.



As of December 31, 2015	Exelon			ComEd			PECO			BGE
Purchased receivables ^(a)	$	229		$	103		$	67		$	59
Allowance for uncollectible accounts ^(b)	(31		)	(16		)	(7		)	(8		)
Purchased receivables, net	$	198		$	87		$	60		$	51

As of December 31, 2014	Exelon			ComEd			PECO			BGE
Purchased receivables ^(a)	$	290		$	139		$	76		$	75
Allowance for uncollectible accounts ^(b)	(42		)	(21		)	(8		)	(13		)
Purchased receivables, net	$	248		$	118		$	68		$	62

_________________________

(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. The implementation costs were fully recovered and the 1% discount was reset to 0%, effective July 2015.

(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.

Schedule of Public Utilities Genera Disclosures [Table Text Block]



	ComEd									BGE
Annual Transmission Filings	2015			2014			2013			2015			2014			2013
Initial revenue requirement increase ^(a)	$	68		$	36		$	38		$	—		$	9		$	2
Annual reconciliation (decrease) increase	18			(14		)	30			(3		)	5			(3		)
Total revenue requirement increase	$	86		$	22		$	68		$	(3	)	$	14		$	(1	)

Allowed return on rate base ^(b)	8.61		%	8.62		%	8.7		%	8.46		%	8.53		%	8.35		%
Allowed ROE	11.5		%	11.5		%	11.5		%	11.3		%	11.3		%	11.3		%

Effective date of rates ^(c)	June 2015			June 2014			June 2013			June 2015			June 2014			June 2013