Fair Value of Financial Assets and Liabilities (Tables)

6 Months Ended

Jun. 30, 2015

Fair Value Tables [Line Items]

Fair value of financial liabilities recorded at the carrying amount

The following tables present the carrying amounts and fair values of the Registrants’ short-term liabilities, long-term debt, SNF obligation, and trust preferred securities (long-term debt to financing trusts or junior subordinated debentures) as of June 30, 2015 and December 31, 2014:

Exelon

	June 30, 2015
	Carrying Amount		Fair Value
			Level 1		Level 2		Level 3		Total
Short-term liabilities	$	546	$	3	$	543	$	—	$	546
Long-term debt (including amounts due within one year)	25,446		1,043		24,011		1,349		26,403
Long-term debt to financing trusts	648		—		—		663		663
SNF obligation	1,021		—		838		—		838

	December 31, 2014
	Carrying Amount		Fair Value
			Level 1		Level 2		Level 3		Total
Short-term liabilities	$	463	$	3	$	448	$	12	$	463
Long-term debt (including amounts due within one year)	21,164		1,208		20,417		1,311		22,936
Long-term debt to financing trusts	648		—		—		648		648
SNF obligation	1,021		—		833		—		833

Assets and liabilities measured and recorded at fair value on recurring basis

The following tables present assets and liabilities measured and recorded at fair value on Exelon's and Generation’s Consolidated Balance Sheets on a recurring basis and their level within the fair value hierarchy as of June 30, 2015 and December 31, 2014:

	Generation								Exelon
As of June 30, 2015	Level 1		Level 2		Level 3		Total		Level 1			Level 2			Level 3			Total
Assets
Cash equivalents(a)	$	134	$	—	$	—	$	134	$	5,486		$	—		$	—		$	5,486
Nuclear decommissioning trust fund investments
Cash equivalents	333		55		—		388		333			55			—			388
Equity
Domestic	2,389		2,055		—		4,444		2,389			2,055			—			4,444
Foreign	696		—		—		696		696			—			—			696
Equity funds subtotal	3,085		2,055		—		5,140		3,085			2,055			—			5,140
Fixed income
Corporate debt	—		1,860		250		2,110		—			1,860			250			2,110
U.S. Treasury and agencies	1,165		—		—		1,165		1,165			—			—			1,165
Foreign governments	—		83		—		83		—			83			—			83
State and municipal debt	—		405		—		405		—			405			—			405
Other	—		463		—		463		—		—	463		—	—		—	463
Fixed income subtotal	1,165		2,811		250		4,226		1,165			2,811			250			4,226
Middle market lending	—		—		417		417		—			—			417			417
Private Equity	—		—		100		100		—			—			100			100
Real Estate	—		—		19		19		—		—	—		—	19			19
Other	—		329		—		329		—			329			—			329
Nuclear decommissioning trust fund investments subtotal(b)	4,583		5,250		786		10,619		4,583			5,250			786			10,619

	Generation												Exelon
As of June 30, 2015	Level 1			Level 2			Level 3			Total			Level 1				Level 2				Level 3			Total
Pledged assets for Zion Station decommissioning
Cash equivalents	—			17			—			17			—				17				—			17
Equities	5			1			—			6			5				1				—			6
Fixed income
U.S. Treasury and agencies	7			2			—			9			7				2				—			9
Corporate debt	—			62			—			62			—				62				—			62
State and municipal debt	—			10			—			10			—				10				—			10
Other	—			3			—			3			—			—	3			—	—			3
Fixed income subtotal	7			77			—			84			7				77				—			84
Middle market lending	—			—			156			156			—				—				156			156
Pledged assets for Zion Station      decommissioning subtotal(c)	12			95			156			263			12				95				156			263
Rabbi trust investments in mutual funds(d)(e)	17			—			—			17			48				—				—			48
Commodity derivative assets
Economic hedges	1,080			3,352			2,334			6,766			1,080				3,352				2,334			6,766
Proprietary trading	117			239			38			394			117				239				38			394
Effect of netting and allocation of collateral(f)	(1,364		)	(2,753		)	(872		)	(4,989		)	(1,364		)		(2,753		)		(872		)	(4,989		)
Commodity derivative assets subtotal	(167		)	838			1,500			2,171			(167		)		838				1,500			2,171
Interest rate and foreign currency derivative         assets
Derivatives designated as hedging instruments	—			1			—			1			—				22				—			22
Economic hedges	—			20			—			20			—				20				—			20
Proprietary trading	14			1			—			15			14				1				—			15
Effect of netting and allocation of collateral	(8		)	(5		)	—			(13		)	(8		)		(5		)		—			(13		)
Interest rate and foreign currency derivative         assets subtotal	6			17			—			23			6				38				—			44
Other investments	—			—			30			30			1				—				30			31
Total assets	4,585			6,200			2,472			13,257			9,969				6,221				2,472			18,662
Liabilities
Commodity derivative liabilities
Economic hedges	(1,493		)	(3,129		)	(1,462		)	(6,084		)	(1,493		)		(3,129		)		(1,685		)	(6,307		)
Proprietary trading	(111		)	(248		)	(43		)	(402		)	(111		)		(248		)		(43		)	(402		)
Effect of netting and allocation of collateral(f)	1,641			3,296			1,026			5,963			1,641				3,296				1,026			5,963
Commodity derivative liabilities subtotal	37			(81		)	(479		)	(523		)	37				(81		)		(702		)	(746		)
Interest rate and foreign currency derivative         liabilities
Derivatives designated as hedging instruments	—			(14		)	—			(14		)	—				(14		)		—			(14		)
Economic hedges	—			(4		)	—			(4		)	—				(4		)		—			(4		)
Proprietary trading	(14		)	—			—			(14		)	(14		)		—				—			(14		)
Effect of netting and allocation of collateral	14			5			—			19			14				5				—			19
Interest rate and foreign currency derivative         liabilities subtotal	—			(13		)	—			(13		)	—				(13		)		—			(13		)
Deferred compensation obligation	—			(26		)	—			(26		)	—				(88		)		—			(88		)
Total liabilities	37			(120		)	(479		)	(562		)	37				(182		)		(702		)	(847		)
Total net assets	$	4,622		$	6,080		$	1,993		$	12,695		$	10,006			$	6,039			$	1,770		$	17,815

	Generation								Exelon
As of December 31, 2014	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets
Cash equivalents(a)	$	405	$	—	$	—	$	405	$	1,119	$	—	$	—	$	1,119
Nuclear decommissioning trust fund investments
Cash equivalents	208		37		—		245		208		37		—		245

	Generation								Exelon
As of December 31, 2014	Level 1		Level 2		Level 3		Total		Level 1			Level 2			Level 3		Total
Equity
Domestic	2,423		2,207		—		4,630		2,423			2,207			—		4,630
Foreign	612		—		—		612		612			—			—		612
Equity funds subtotal	3,035		2,207		—		5,242		3,035			2,207			—		5,242
Fixed income
Corporate debt	—		2,023		239		2,262		—			2,023			239		2,262
U.S. Treasury and agencies	996		—		—		996		996			—			—		996
Foreign governments	—		95		—		95		—			95			—		95
State and municipal debt	—		438		—		438		—			438			—		438
Other	—		511		—		511		—		—	511		—	—		511
Fixed income subtotal	996		3,067		239		4,302		996			3,067			239		4,302
Middle market lending	—		—		366		366		—			—			366		366
Private Equity	—		—		83		83		—			—			83		83
Real Estate	—		—		3		3		—		—	—		—	3		3
Other	—		301		—		301		—			301			—		301
Nuclear decommissioning trust fund investments subtotal(b)	4,239		5,612		691		10,542		4,239			5,612			691		10,542
Pledged assets for Zion Station      decommissioning
Cash equivalents	—		15		—		15		—			15			—		15
Equities	6		1		—		7		6			1			—		7
Fixed income
U.S. Treasury and agencies	5		3		—		8		5			3			—		8
Corporate debt	—		89		—		89		—			89			—		89
State and municipal debt	—		10		—		10		—			10			—		10
Other	—		3		—		3		—		—	3		—	—		3
Fixed income subtotal	5		105		—		110		5			105			—		110
Middle market lending	—		—		184		184		—			—			184		184
Pledged assets for Zion Station     decommissioning subtotal(c)	11		121		184		316		11			121			184		316
Rabbi trust investments(d)
Cash equivalents	—		—		—		—		1			—			—		1
Mutual funds(e)	16		—		—		16		46			—			—		46
Rabbi trust investments subtotal	16		—		—		16		47			—			—		47
Commodity derivative assets
Economic hedges	1,667		3,465		1,681		6,813		1,667			3,465			1,681		6,813
Proprietary trading	201		284		27		512		201			284			27		512
Effect of netting and allocation of collateral(f)	(1,982	)	(2,757	)	(557	)	(5,296	)	(1,982	)		(2,757	)		(557	)	(5,296	)
Commodity derivative assets subtotal	(114	)	992		1,151		2,029		(114	)		992			1,151		2,029
Interest rate and foreign currency derivative     assets
Derivatives designated as hedging instruments	—		8		—		8		—			31			—		31
Economic hedges	—		12		—		12		—			13			—		13
Proprietary trading	18		9		—		27		18			9			—		27
Effect of netting and allocation of collateral	(17	)	(12	)	—		(29	)	(17	)		(31	)		—		(48	)
Interest rate and foreign currency derivative     assets subtotal	1		17		—		18		1			22			—		23
Other investments	—		—		3		3		2			—			3		5
Total assets	4,558		6,742		2,029		13,329		5,305			6,747			2,029		14,081

	Generation												Exelon
As of December 31, 2014	Level 1			Level 2			Level 3			Total			Level 1			Level 2			Level 3			Total
Liabilities
Commodity derivative liabilities
Economic hedges	(2,241		)	(3,458		)	(788		)	(6,487		)	(2,241		)	(3,458		)	(995		)	(6,694		)
Proprietary trading	(195		)	(295		)	(42		)	(532		)	(195		)	(295		)	(42		)	(532		)
Effect of netting and allocation of collateral(f)	2,416			3,557			729			6,702			2,416			3,557			729			6,702
Commodity derivative liabilities subtotal	(20		)	(196		)	(101		)	(317		)	(20		)	(196		)	(308		)	(524		)
Interest rate and foreign currency derivative     liabilities
Derivatives designated as hedging instruments	—			(12		)	—			(12		)	—			(41		)	—			(41		)
Economic hedges	—			(2		)	—			(2		)	—			(103		)	—			(103		)
Proprietary trading	(14		)	(9		)	—			(23		)	(14		)	(9		)	—			(23		)
Effect of netting and allocation of collateral	25			10			—			35			25			29			—			54
Interest rate and foreign currency derivative     liabilities subtotal	11			(13		)	—			(2		)	11			(124		)	—			(113		)
Deferred compensation obligation	—			(31		)	—			(31		)	—			(107		)	—			(107		)
Total liabilities	(9		)	(240		)	(101		)	(350		)	(9		)	(427		)	(308		)	(744		)
Total net assets	$	4,549		$	6,502		$	1,928		$	12,979		$	5,296		$	6,320		$	1,721		$	13,337

______________ 

(a) Excludes certain cash equivalents considered to be held-to-maturity and not reported at fair value.

(b) Excludes net liabilities of $(12) million and $(5) million at June 30, 2015 and December 31, 2014, respectively. These items consist of receivables related to pending securities sales, interest and dividend receivables, and payables related to pending securities purchases.

(c) Excludes net assets of $1 million and $3 million at June 30, 2015 and December 31, 2014, respectively. These items consist of receivables related to pending securities sales, interest and dividend receivables, and payables related to pending securities purchases.

(d) Excludes $36 million and $35 million of cash surrender value of life insurance investment at June 30, 2015 and December 31, 2014, respectively, at Exelon Consolidated. Excludes $13 million and $11 million and of cash surrender value of life insurance investment at June 30, 2015 and December 31, 2014, respectively, at Generation.

(e) The mutual funds held by the Rabbi trusts at Exelon include $47 million related to deferred compensation and $1 million related to Supplemental Executive Retirement Plan at June 30, 2015, and $45 million related to deferred compensation and $1 million related to Supplemental Executive Retirement Plan at December 31, 2014.

(f) Collateral posted to/(received from) counterparties totaled $277 million, $543 million and $154 million allocated to Level 1, Level 2 and Level 3 mark-to-market derivatives, respectively, as of June 30, 2015. Collateral posted to/(received from) counterparties totaled $434 million, $800 million and $172 million allocated to Level 1, Level 2 and Level 3 mark-to-market derivatives, respectively, as of December 31, 2014.

ComEd, PECO and BGE

The following tables present assets and liabilities measured and recorded at fair value on the utility Registrants' Consolidated Balance Sheets on a recurring basis and their level within the fair value hierarchy as of June 30, 2015 and December 31, 2014:

	ComEd											PECO										BGE
As of June 30, 2015	Level 1		Level 2			Level 3			Total			Level 1		Level 2			Level 3		Total			Level 1		Level 2			Level 3		Total
Assets
Cash equivalents	$	5	$	—		$	—		$	5		$	5	$	—		$	—	$	5		$	46	$	—		$	—	$	46
Rabbi trust investments in mutual funds (a)	—		—			—			—			8		—			—		8			5		—			—		5
Total assets	5		—			—			5			13		—			—		13			51		—			—		51
Liabilities
Deferred compensation     obligation	—		(7		)	—			(7		)	—		(10		)	—		(10		)	—		(3		)	—		(3		)
Mark-to-market derivative     liabilities (b)	—		—			(223		)	(223		)	—		—			—		—			—		—			—		—
Total liabilities	—		(7		)	(223		)	(230		)	—		(10		)	—		(10		)	—		(3		)	—		(3		)
Total net assets (liabilities)	$	5	$	(7	)	$	(223	)	$	(225	)	$	13	$	(10	)	$	—	$	3		$	51	$	(3	)	$	—	$	48

	ComEd											PECO										BGE
As of December 31, 2014	Level 1		Level 2			Level 3			Total			Level 1		Level 2			Level 3		Total			Level 1		Level 2			Level 3		Total
Assets
Cash equivalents	$	25	$	—		$	—		$	25		$	12	$	—		$	—	$	12		$	103	$	—		$	—	$	103
Rabbi trust investments in mutual funds (a)	—		—			—			—			9		—			—		9			5		—			—		$	5
Total assets	25		—			—			25			21		—			—		21			108		—			—		108
Liabilities
Deferred compensation obligation	—		(8		)	—			(8		)	—		(15		)	—		(15		)	—		(5		)	—		(5		)
Mark-to-market derivative liabilities (b)	—		—			(207		)	(207		)	—		—			—		—			—		—			—		—
Total liabilities	—		(8		)	(207		)	(215		)	—		(15		)	—		(15		)	—		(5		)	—		(5		)
Total net assets (liabilities)	$	25	$	(8	)	$	(207	)	$	(190	)	$	21	$	(15	)	$	—	$	6		$	108	$	(5	)	$	—	$	103

______________ 

(a) At PECO, excludes $12 million and $14 million of the cash surrender value of life insurance investments at June 30, 2015 and December 31, 2014, respectively.

(b) The Level 3 balance includes the current and noncurrent liability of $20 million and $203 million at June 30, 2015, respectively, and $20 million and $187 million at December 31, 2014, respectively, related to floating-to-fixed energy swap contracts with unaffiliated suppliers.

Fair value reconciliation of Level 3 assets and liabilities measured at fair value on a recurring basis

The following table presents the fair value reconciliation of Level 3 assets and liabilities measured at fair value on a recurring basis during the three and six months ended June 30, 2015 and 2014:

	Generation															ComEd						Exelon
Three Months Ended June 30, 2015	Nuclear Decommissioning Trust Fund Investments			Pledged Assets for Zion Station Decommissioning			Mark-to-Market Derivatives				Other Investments		Total Generation			Mark-to-Market Derivatives (b)			Eliminated in Consolidation			Total
Balance as of March 31, 2015	$	715		$	178		$	1,066			$	3	$	1,962		$	(241	)	$	—		$	1,721
Total realized / unrealized gains (losses)
Included in net income	2			—			(7		)	(a)	—		(5		)	—			—			(5		)
Included in noncurrent payables to affiliates	7			—			—				—		7			—			(7		)	—
Included in payable for Zion Station decommissioning	—			(2		)	—				—		(2		)	—			—			(2		)
Included in regulatory assets	—			—			—				—		—			18			7			25
Change in collateral	—			—			(30		)		—		(30		)	—			—			(30		)
Purchases, sales, issuances and settlements
Purchases	99			6			16				27		148			—			—			148
Sales	—			(26		)	(5		)		—		(31		)	—			—			(31		)
Settlements	(37		)	—			—				—		(37		)	—			—			(37		)
Transfers into Level 3	—			—			11				—		11			—			—			11
Transfers out of Level 3	—			—			(30		)		—		(30		)	—			—			(30		)
Balance as of June 30, 2015	$	786		$	156		$	1,021			$	30	$	1,993		$	(223	)	$	—		$	1,770
The amount of total gains included in income attributed to the change in unrealized gains related to assets and liabilities held for the three months ended June 30, 2015	$	4		$	—		$	175			$	—	$	179		$	—		$	—		$	179

	Generation															ComEd						Exelon
Six Months Ended June 30, 2015	Nuclear Decommissioning Trust Fund Investments			Pledged Assets for Zion Station Decommissioning			Mark-to-Market Derivatives				Other Investments		Total Generation			Mark-to-Market Derivatives (b)			Eliminated in Consolidation			Total
Balance as of December 31, 2014	$	691		$	184		$	1,050			$	3	$	1,928		$	(207	)	$	—		$	1,721
Total realized / unrealized gains (losses)
Included in net income	4			—			(39		)	(a)	—		(35		)	—			—			(35		)
Included in noncurrent payables to affiliates	15			—			—				—		15			—			(15		)	—
Included in payable for Zion Station decommissioning	—			1			—				—		1			—			—			1
Included in regulatory assets	—			—			—				—		—			(16		)	15			(1		)
Change in collateral	—			—			(18		)		—		(18		)	—			—			(18		)
Purchases, sales, issuances and settlements
Purchases	146			11			57				27		241			—			—			241
Sales	(8		)	(40		)	(5		)		—		(53		)	—			—			(53		)
Settlements	(66		)	—			—				—		(66		)	—			—			(66		)
Transfers into Level 3	4			—			11				—		15			—			—			15
Transfers out of Level 3	—			—			(35		)		—		(35		)	—			—			(35		)
Balance as of June 30, 2015	$	786		$	156		$	1,021			$	30	$	1,993		$	(223	)	$	—		$	1,770
The amount of total gains (losses) included in income attributed to the change in unrealized gains (losses) related to assets and liabilities held for the six months ended June 30, 2015	$	5		$	—		$	355			$	—	$	360		$	—		$	—		$	360

______________ 

(a) Includes the reclassification of $(182) million and $(394) million of realized losses due to the settlement of derivative contracts for the three and six months ended June 30, 2015, respectively.

(b) Includes $14 million of increases in fair value and realized losses due to settlements of $4 million recorded in purchased power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the three months ended June 30, 2015. Includes $22 million of decreases in fair value and realized losses due to settlements of $6 million for the six months ended June 30, 2015.

	Generation															ComEd						Exelon
Three Months Ended June 30, 2014	Nuclear Decommissioning Trust Fund Investments			Pledged Assets for Zion Station Decommissioning			Mark-to-Market Derivatives				Other Investments		Total Generation			Mark-to-Market Derivatives(b)			Eliminated in Consolidation			Total
Balance as of March 31, 2014	$	486		$	137		$	287			$	10	$	920		$	(168	)	$	—		$	752
Total realized / unrealized gains (losses)
Included in net income	2			—			(48		)	(a)	—		(46		)	—			—			(46		)
Included in noncurrent payables to affiliates	8			—			—				—		8			—			(8		)	—
Included in payable for Zion Station decommissioning	—			4			—				—		4			—			—			4
Included in regulatory assets	—			—			—				—		—			34			8			42
Change in collateral	—			—			34				—		34			—			—			34
Purchases, sales, issuances and settlements
Purchases	109			13			5				—		127			—			—			127
Sales	(1		)	(21		)	(4		)		—		(26		)	—			—			(26		)
Settlements	(12		)	—			—				—		(12		)	—			—			(12		)
Transfers into Level 3	—			—			(4		)		—		(4		)	—			—			(4		)
Transfers out of Level 3	—			—			(28		)		—		(28		)	—			—			(28		)
Balance as of June 30, 2014	$	592		$	133		$	242			$	10	$	977		$	(134	)	$	—		$	843
The amount of total gains included in income attributed to the change in unrealized gains related to assets and liabilities held for the three months ended June 30, 2014	$	2		$	—		$	19			$	—	$	21		$	—		$	—		$	21

	Generation																ComEd						Exelon
Six Months Ended June 30, 2014	Nuclear Decommissioning Trust Fund Investments			Pledged Assets for Zion Station Decommissioning			Mark-to-Market Derivatives				Other Investments			Total Generation			Mark-to- Market Derivatives(b)			Eliminated in Consolidation			Total
Balance as of December 31, 2013	$	350		$	112		$	465			$	15		$	942		$	(193	)	$	—		$	749
Total realized / unrealized gains (losses)
Included in net income	3			—			(360		)	(a)	—			(357		)	—			—			$	(357	)
Included in noncurrent payables to affiliates	11			—			—				—			11			—			(11		)	$	—
Included in payable for Zion Station decommissioning	—			4			—				—			4			—			—			$	4
Included in regulatory assets	—			—			—				—			—			59			11			$	70
Change in collateral	—			—			178				—			178			—			—			$	178
Purchases, sales, issuances and settlements
Purchases	249			42			15				2			308			—			—			$	308
Sales	(2		)	(25		)	(6		)		—			(33		)	—			—			$	(33	)
Settlements	(19		)	—			—				—			(19		)	—			—			$	(19	)
Transfers into Level 3	—			—			(30		)		—			(30		)	—			—			$	(30	)
Transfers out of Level 3	—			—			(20		)		(7		)	(27		)	—			—			$	(27	)
Balance as of June 30, 2014	$	592		$	133		$	242			$	10		$	977		$	(134	)	$	—		$	843
The amount of total gains included in income attributed to the change in unrealized gains related to assets and liabilities held for the six months ended June 30, 2014	$	2		$	—		$	(427	)		$	—		$	(425	)	$	—		$	—		$	(425	)

______________ 

(a) Includes the reclassification of $67 million of realized losses due to the settlement of derivative contracts for the three and six months ended June 30, 2014.

(b) Includes $34 million of increases in fair value and immaterial realized losses recorded in purchased power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the three months ended June 30, 2014. Includes $64 million of increases in fair value and realized gains due to settlements of $5 million for the six months ended June 30, 2014.

Total realized and unrealized gains (losses) included in income for Level 3 assets and liabilities measured at fair value on a recurring basis

The following tables present the income statement classification of the total realized and unrealized gains (losses) included in income for Level 3 assets and liabilities measured at fair value on a recurring basis during the three and six months ended June 30, 2015 and 2014:

	Generation								Exelon
	Operating Revenues			Purchased Power and Fuel			Other, net(a)		Operating Revenues			Purchased Power and Fuel			Other, net(a)
Total gains (losses) included in net income for the three months ended June 30, 2015	$	(17	)	$	10		$	2	$	(17	)	$	10		$	2
Total gains (losses) included in net income for the six months ended June 30, 2015	(27		)	(12		)	4		(27		)	(12		)	4
Change in the unrealized gains (losses) relating to assets and liabilities held for the three months ended June 30, 2015	171			4			4		171			4			4
Change in the unrealized gains (losses) relating to assets and liabilities held for the six months ended June 30, 2015	340			15			5		340			15			5

	Generation								Exelon
	Operating Revenues			Purchased Power and Fuel			Other, net(a)		Operating Revenues			Purchased Power and Fuel			Other, net(a)
Total gains (losses) included in net income for the three months ended June 30, 2014	$	(62	)	$	14		$	2	$	(62	)	$	14		$	2
Total gains (losses) included in net income for the six months ended June 30, 2014	(330		)	(30		)	3		(330		)	(30		)	3
Change in the unrealized gains (losses) relating to assets and liabilities held for the three months ended June 30, 2014	(10		)	29			2		(10		)	29			2
Change in the unrealized gains (losses) relating to assets and liabilities held for the six months ended June 30, 2014	(435		)	8			2		(435		)	8			2

______________ 

(a) Other, net activity consists of realized and unrealized gains (losses) included in income for the NDT funds held by Generation.

Exelon Generation Co L L C [Member]

Fair Value Tables [Line Items]

Fair value of financial liabilities recorded at the carrying amount

Generation

	June 30, 2015
	Carrying Amount		Fair Value
			Level 1		Level 2		Level 3		Total
Short-term liabilities	$	40	$	—	$	40	$	—	$	40
Long-term debt (including amounts due within one year)	9,001		—		7,995		1,349		9,344
SNF obligation	1,021		—		838		—		838

	December 31, 2014
	Carrying Amount		Fair Value
			Level 1		Level 2		Level 3		Total
Short-term liabilities	$	36	$	—	$	24	$	12	$	36
Long-term debt (including amounts due within one year)	8,266		—		7,511		1,311		8,822
SNF obligation	1,021		—		833		—		833

Commonwealth Edison Co [Member]

Fair Value Tables [Line Items]

Fair value of financial liabilities recorded at the carrying amount

ComEd

	June 30, 2015
	Carrying Amount		Fair Value
			Level 1		Level 2		Level 3		Total
Short-term liabilities	$	503	$	—	$	503	$	—	$	503
Long-term debt (including amounts due within one year)	6,099		—		6,640		—		6,640
Long-term debt to financing trust	206		—		—		206		206

	December 31, 2014
	Carrying Amount		Fair Value
			Level 1		Level 2		Level 3		Total
Short-term liabilities	$	304	$	—	$	304	$	—	$	304
Long-term debt (including amounts due within one year)	5,958		—		6,788		—		6,788
Long-term debt to financing trust	206		—		—		213		213

PECO Energy Co [Member]

Fair Value Tables [Line Items]

Fair value of financial liabilities recorded at the carrying amount

PECO

	June 30, 2015
	Carrying Amount		Fair Value
			Level 1		Level 2		Level 3		Total
Long-term debt (including amounts due within one year)	$	2,246	$	—	$	2,432	$	—	$	2,432
Long-term debt to financing trusts	184		—		—		199		199

	December 31, 2014
	Carrying Amount		Fair Value
			Level 1		Level 2		Level 3		Total
Long-term debt (including amounts due within one year)	$	2,246	$	—	$	2,537	$	—	$	2,537
Long-term debt to financing trusts	184		—		—		199		199

Baltimore Gas and Electric Company [Member]

Fair Value Tables [Line Items]

Fair value of financial liabilities recorded at the carrying amount

BGE

	June 30, 2015
	Carrying Amount		Fair Value
			Level 1		Level 2		Level 3		Total
Short-term liabilities	$	3	$	3	$	—	$	—	$	3
Long-term debt (including amounts due within one year)	1,905		—		2,086		—		2,086
Long-term debt to financing trusts	258		—		—		258		258

	December 31, 2014
	Carrying Amount		Fair Value
			Level 1		Level 2		Level 3		Total
Short-term liabilities	$	123	$	3	$	120	$	—	$	123
Long-term debt (including amounts due within one year)	1,942		—		2,178		—		2,178
Long-term debt to financing trusts	258		—		—		236		236