XML 88 R48.htm IDEA: XBRL DOCUMENT v2.4.1.9
Fair Value of Financial Assets and Liabilities (Tables)
12 Months Ended
Dec. 31, 2014
Fair Value Disclosures [Abstract]  
Fair value reconciliation of Level 3 assets and liabilities measured at fair value on a recurring basis
The following tables present assets and liabilities measured and recorded at fair value on the Utilities' Consolidated Balance Sheets on a recurring basis and their level within the fair value hierarchy as of December 31, 2014 and 2013:
 
 
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


 
ComEd
 
PECO
 
BGE
As of December 31, 2013
Level 1
 
Level 2
 
Level 3
 
Total
 
Level 1
 
Level 2
 
Level 3
 
Total
 
Level 1
 
Level 2
 
Level 3
 
Total
Assets
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Cash equivalents
$


$


$

 
$

 
$
175


$


$

 
$
175

 
$
31


$


$

 
$
31

Rabbi trust investments in Mutual funds (a)
5





 
5

 
9





 
9

 
6





 
6

Total assets
5






5


184






184


37






37

Liabilities





 

 





 

 





 

Deferred compensation
obligation


(8
)


 
(8
)
 


(17
)


 
(17
)
 


(6
)


 
(6
)
Mark-to-market derivative
liabilities (b)




(193
)
 
(193
)
 





 

 





 

Total liabilities


(8
)

(193
)

(201
)



(17
)



(17
)



(6
)



(6
)
Total net assets (liabilities)
$
5


$
(8
)

$
(193
)

$
(196
)

$
184


$
(17
)

$


$
167


$
37


$
(6
)

$


$
31

_________________________
(a)
At PECO, excludes $14 million of the cash surrender value of life insurance investments at both December 31, 2014 and 2013.
(b)
The Level 3 balance includes the current and noncurrent liability of $20 million and $187 million, respectively, at December 31, 2014, and $17 million and $176 million, respectively, at December 31, 2013, related to floating-to-fixed energy swap contracts with unaffiliated suppliers.
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 December 31, 2014 and 2013:
Exelon
 
 
December 31, 2014
 
December 31, 2013
 
Carrying
Amount
 
Fair Value
 
Carrying
Amount
 
Fair Value
 
Level 1
 
Level 2
 
Level 3
 
Total
 
 
Short-term liabilities
$
463

 
$
3


$
448


$
12

 
$
463

 
$
344

 
$
344

Long-term debt (including amounts due within one year)
21,164

 
1,208


20,417


1,311

 
22,936

 
19,132

 
19,751

Long-term debt to financing trusts
648

 




648

 
648

 
648

 
631

SNF obligation
1,021

 


833



 
833

 
1,021

 
790


Generation
 
 
December 31, 2014
 
December 31, 2013
 
Carrying
Amount
 
Fair Value
 
Carrying
Amount
 
Fair Value
 
Level 1
 
Level 2
 
Level 3
 
Total
 
 
Short-term liabilities
$
36

 
$


$
24


$
12

 
$
36

 
$
22

 
$
22

Long-term debt (including amounts due within one year)
8,266

 


7,511


1,311

 
8,822

 
7,729

 
7,648

SNF obligation
1,021

 


833



 
833

 
1,021

 
790


ComEd
 
 
December 31, 2014
 
December 31, 2013
 
Carrying
Amount
 
Fair Value
 
Carrying
Amount
 
Fair Value
 
Level 1
 
Level 2
 
Level 3
 
Total
 
 
Short-term liabilities
$
304

 
$


$
304


$

 
$
304

 
$
184

 
$
184

Long-term debt (including amounts due within one year)
5,958

 


6,788



 
6,788

 
5,675

 
6,255

Long-term debt to financing trust
206

 




213

 
213

 
206

 
202


PECO
 
 
December 31, 2014
 
December 31, 2013
 
Carrying
Amount
 
Fair Value
 
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

 
$
2,197

 
$
2,358

Long-term debt to financing trusts
184

 




199

 
199

 
184

 
180

 

BGE
 
 
December 31, 2014
 
December 31, 2013
 
Carrying
Amount
 
Fair Value
 
Carrying
Amount
 
Fair Value
 
Level 1
 
Level 2
 
Level 3
 
Total
 
 
Short-term liabilities
$
123

 
$
3


$
120


$

 
$
123

 
$
138

 
$
138

Long-term debt (including amounts due within one year)
1,942

 


2,178



 
2,178

 
2,011

 
2,148

Long-term debt to financing trusts
258

 




236

 
236

 
258

 
249

Fair value of financial liabilities recorded at the carrying amount
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 December 31, 2014 and 2013:


 
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

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 securities



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 funds 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

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

Assets and liabilities measured and recorded at fair value on recurring basis
 
Generation
 
Exelon
As of December 31, 2013
Level 1
 
Level 2
 
Level 3
 
Total
 
Level 1
 
Level 2
 
Level 3
 
Total
Assets
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Cash equivalents (a)
$
1,006


$


$

 
$
1,006

 
$
1,230


$


$

 
$
1,230

Nuclear decommissioning trust fund investments





 

 





 

Cash equivalents
459





 
459

 
459





 
459

Equities





 

 





 

Domestic
1,642


2,271



 
3,913

 
1,642


2,271



 
3,913

Foreign
249





 
249

 
249





 
249

Equity funds subtotal
1,891


2,271




4,162

 
1,891


2,271




4,162

Fixed income





 

 





 

Corporate debt securities


1,753


31

 
1,784

 


1,753


31

 
1,784

U.S. Treasury and agencies
882





 
882

 
882





 
882

Foreign governments


87



 
87

 


87



 
87

State and municipal debt


294



 
294

 


294



 
294

Other

 
75

 

 
75

 

 
75

 

 
75

Fixed income subtotal
882


2,209


31


3,122


882


2,209


31


3,122

Middle market lending




314

 
314

 




314

 
314

Private equity




5

 
5

 




5

 
5

Other


14



 
14

 


14



 
14

Nuclear decommissioning trust funds subtotal (b)
3,232


4,494


350


8,076


3,232


4,494


350


8,076

Pledged assets for Zion Station
decommissioning





 

 





 

Cash equivalents


26



 
26

 


26



 
26

Equities
16





 
16

 
16





 
16

Fixed income





 

 





 

U.S. Treasury and agencies
45


4



 
49

 
45


4



 
49

Corporate debt


227



 
227

 


227



 
227

State and municipal debt


20



 
20

 


20



 
20

Fixed income subtotal
45


251




296


45


251




296

Middle market lending




112

 
112

 




112

 
112

Other


1



 
1

 


1



 
1

Pledged assets for Zion Station
decommissioning subtotal (c)
61


278


112


451


61


278


112


451

Rabbi trust investments (d)





 

 





 

Cash equivalents





 

 
2





 
2

Mutual funds (e)
13





 
13

 
54





 
54

Rabbi trust investments subtotal
13






13


56






56

Commodity derivative assets





 

 





 

Economic hedges
493


2,582


885

 
3,960

 
493


2,582


885

 
3,960

Proprietary trading
324


1,315


122

 
1,761

 
324


1,315


122

 
1,761

Effect of netting and allocation of collateral (f)
(863
)

(3,131
)

(430
)
 
(4,424
)
 
(863
)

(3,131
)

(430
)
 
(4,424
)
Commodity derivative assets subtotal
(46
)

766


577


1,297


(46
)

766


577


1,297

Interest rate and foreign currency derivative
assets
30


32



 
62

 
30


39



 
69

Effect of netting and allocation of collateral
(30
)

(2
)


 
(32
)
 
(30
)

(2
)


 
(32
)
Interest rate and foreign currency derivative
assets subtotal


30




30




37




37

Other investments




15

 
15

 




15

 
15

Total assets
4,266


5,568


1,054


10,888


4,533


5,575


1,054


11,162

Liabilities





 

 





 

Commodity derivative liabilities





 

 





 

Economic hedges
(540
)

(1,890
)

(397
)
 
(2,827
)
 
(540
)

(1,890
)

(590
)
 
(3,020
)
Proprietary trading
(328
)

(1,256
)

(119
)
 
(1,703
)
 
(328
)

(1,256
)

(119
)
 
(1,703
)
Effect of netting and allocation of collateral (f)
869


3,007


404

 
4,280

 
869


3,007


404

 
4,280

Commodity derivative liabilities subtotal
1


(139
)

(112
)

(250
)

1


(139
)

(305
)

(443
)
Interest rate and foreign currency derivative
liabilities
(31
)

(13
)


 
(44
)
 
(31
)

(17
)


 
(48
)
Effect of netting and allocation of collateral
31


1



 
32

 
31


1



 
32

Interest rate and foreign currency derivative
liabilities subtotal


(12
)



(12
)



(16
)



(16
)
Deferred compensation obligation


(29
)


 
(29
)
 


(114
)


 
(114
)
Total liabilities
1


(180
)

(112
)

(291
)

1


(269
)

(305
)

(573
)
Total net assets
$
4,267


$
5,388


$
942


$
10,597


$
4,534


$
5,306


$
749


$
10,589

_________________________
(a)
Excludes certain cash equivalents considered to be held-to-maturity and not reported at fair value.
(b)
Excludes net liabilities of $5 million at both December 31, 2014 and 2013. 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 $3 million and $7 million at December 31, 2014 and 2013, respectively. These items consist of receivables related to pending securities sales, interest and dividend receivables, and payables related to pending securities purchases.
(d)
Excludes $35 million and $32 million of cash surrender value of life insurance investment at December 31, 2014 and 2013, respectively, at Exelon Consolidated. Excludes $11 million and $10 million of cash surrender value of life insurance investment at December 31, 2014 and 2013, respectively, at Generation.
(e)
The mutual funds held by the Rabbi trusts at Exelon Consolidated include $45 million related to deferred compensation and $1 million related to a Supplemental Executive Retirement Plan at December 31, 2014, and $53 million related to deferred compensation and $1 million related to a Supplemental Executive Retirement Plan at December 31, 2013.
(f)
Includes collateral postings (received) to/from counterparties. Collateral posted (received) to/from counterparties, net of collateral paid to 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. Collateral posted (received) to/from counterparties, net of collateral paid to counterparties, totaled $6 million, $(124) million and $(26) million allocated to Level 1, Level 2 and Level 3 mark-to-market derivatives, respectively, as of December 31, 2013.

Total realized and unrealized gains (losses) included in income for Level 3 assets and liabilities measured at fair value on a recurring basis
 
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 year ended December 31, 2013
$
(158
)
 
$
107

 
$
2

 
$
(152
)
 
$
108

 
$
2

Change in the unrealized gains relating to assets and liabilities held for the year ended December 31, 2013
$
30

 
$
126

 
$
1

 
$
40

 
$
127

 
$
1

_________________________
(a)
Other, net activity consists of realized and unrealized gains (losses) included in income for the NDT funds held by Generation.
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 years ended December 31, 2014 and 2013:
 
 
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 year ended December 31, 2014
$
614

 
$
(88
)
 
$
6

 
$
614

 
$
(88
)
 
$
6

Change in the unrealized gains (losses) relating to assets and liabilities held for the year ended December 31, 2014
$
663

 
$
(23
)
 
$
4

 
$
663

 
$
(23
)
 
$
4

The following table presents the fair value reconciliation of Level 3 assets and liabilities measured at fair value on a recurring basis during the year ended December 31, 2014 and 2013:

 
Generation
 
ComEd
 
 
 
Exelon
For The Year Ended December 31, 2014
Nuclear
Decommissioning
Trust Fund
Investments
 
Pledged Assets
for Zion Station
Decommissioning
 
Mark-to-Market
Derivatives
 
Other
Investments
 
Total Generation
 
Other- ComEd (b)
 
Eliminated in Consolidation
 
Total
Balance as of January 1, 2014
$
350


$
112


$
465


$
15

 
$
942

 
$
(193
)
 
$

 
$
749

Total realized / unrealized gains (losses)






 
 


 
 
 
 
 


Included in net income
6




526

(a) 

 
532

 

 

 
532

Included in noncurrent payables to affiliates
14







 
14

 

 
(14
)
 

Included in payable for Zion Station decommissioning


2





 
2

 

 

 
2

Included in regulatory assets/liabilities





 

 

 
(14
)
 
14

 

Change in collateral




198



 
198

 

 

 
198

Purchases, sales, issuances and settlements
 

 

 

 
 


 
 
 
 
 


Purchases
400


120


76

(c) 
2

 
598

 

 

 
598

Sales
(15
)

(50
)

(7
)

(8
)
 
(80
)
 

 

 
(80
)
Settlements
(64
)






 
(64
)
 

 

 
(64
)
Transfers into Level 3




(7
)


 
(7
)
 

 

 
(7
)
Transfers out of Level 3




(201
)

(6
)
 
(207
)
 

 

 
(207
)
Balance as of December 31, 2014
$
691


$
184


$
1,050


$
3


$
1,928

 
$
(207
)
 
$


$
1,721

The amount of total gains included in income attributed to the change in unrealized gains (losses) related to assets and liabilities as of December 31, 2014
$
4

 
$

 
$
640

 
$

 
$
644

 
$

 
$

 
$
644

 
Generation
 
ComEd
 
 
 
Exelon
For The Year Ended December 31, 2013
Nuclear
Decommissioning
Trust Fund
Investments
 
Pledged Assets
for Zion Station
Decommissioning
 
Mark-to-Market
Derivatives (d)
 
Other
Investments
 
Total Generation
 
Other- ComEd (b)(f)
 
Eliminated in Consolidation
 
Total
Balance as of January 1, 2013
$
183


$
89


$
660


$
17

 
$
949

 
$
(293
)
 
$

 
$
656

Total realized / unrealized gains (losses)







 

 

 
 
 

Included in net income
2




(51
)
(a) 

 
(49
)
 

 
7

 
(42
)
Included in other
comprehensive income




(219
)

2

 
(217
)
 

 
219

 
2

Included in noncurrent payables to affiliates
8







 
8

 

 
(8
)
 

Included in payable for Zion Station decommissioning







 

 

 

 

Included in regulatory assets/liabilities

 

 

 

 

 
100

 
(218
)
 
(118
)
Change in collateral




7



 
7

 

 

 
7

Purchases, sales, issuances and settlements







 

 

 
 
 


Purchases
203


62


28


4

 
297

 

 

 
297

Sales
(28
)

(39
)

(11
)

(8
)
 
(86
)
 

 

 
(86
)
Settlements
(18
)






 
(18
)
 

 

 
(18
)
Transfers into Level 3




86

(e) 
1

 
87

 

 

 
87

Transfers out of Level 3




(35
)

(1
)
 
(36
)
 

 

 
(36
)
Balance as of December 31, 2013
$
350


$
112


$
465


$
15


$
942


$
(193
)
 
$


$
749

The amount of total gains included in income attributed to the change in unrealized gains (losses) related to assets and liabilities held as of December 31, 2013
$
1


$


$
156


$

 
$
157

 
$

 
$

 
$
168

_________________________
(a)
Includes the reclassification of $114 million and $207 million of realized gains due to the settlement of derivative contracts for the years ended December 31, 2014 and 2013, respectively.
(b)
Includes $13 million and $133 million of decreases in fair value and $1 million and $(7) million of realized gains (losses) due to settlements associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the years ended December 31, 2014 and 2013, respectively.
(c)
Includes $34 million of fair value from contracts acquired as a result of the Integrys acquisition.
(d)
Includes $11 million of decreases in fair value and realized gains due to settlements of $215 million associated with Generation's financial swap contract with ComEd for the year ended December 31, 2013. All items eliminate upon consolidation in Exelon’s Consolidated Financial Statements.
(e)
Includes an increase of transfers into Level 3 arising from reductions in market liquidity, which resulted in less observable contract tenures in various locations.
(f)
Includes $11 million of increases in fair value and realized losses due to settlements of $215 million associated with Generation's financial swap contract with ComEd for the year ended December 31, 2013. All items eliminate upon consolidation in Exelon’s Consolidated Financial Statements.

Fair value reconciliation of Level 3 assets and liabilities measured at fair value on a recurring basis, valuation technique
The table below discloses the significant inputs to the forward curve used to value these positions.
 
Type of trade
Fair Value at December 31,2014
 
Valuation
Technique
 
Unobservable
Input
 
Range
 
Mark-to-market derivatives—Economic hedges (Generation) (a)(c)
$
893

 
Discounted
Cash Flow
 
Forward power price
 
$15
-
$120
(d) 
 
 
 
 
 
Forward gas price
 
$1.52
-
$14.02
(d) 
 
 
 
Option Model
 
Volatility percentage
 
8%
-
257%
 
Mark-to-market derivatives—Proprietary trading (Generation) (a)(c)
$
(15
)
 
Discounted
Cash Flow
 
Forward power price
 
$15
-
$117
(d) 
Mark-to-market derivatives
(ComEd)
$
(207
)
 
Discounted
Cash Flow
 
Forward heat rate (b)
 
8x
-
9x
 
 
 
 
 
 
Marketability reserve
 
3.5%
-
8%
 
 
 
 
 
 
Renewable factor
 
86%
-
126%
 
_________________________
(a)
The valuation techniques, unobservable inputs and ranges are the same for the asset and liability positions.
(b)
Quoted forward natural gas rates are utilized to project the forward power curve for the delivery of energy at specified future dates. The natural gas curve is extrapolated beyond its observable period to the end of the contract’s delivery.
(c)
The fair values do not include cash collateral held on level three positions of $172 million as of December 31, 2014.
(d)
The upper ends of the ranges are driven by the winter power and gas prices in the New England region. Without the New England region, the upper ends of the ranges for power and gas would be approximately $97 and $8.14, respectively, and would be approximately $76 for power proprietary trading.
 
Type of trade
Fair Value at December 31, 2013
 
Valuation
Technique
 
Unobservable
Input
 
Range
 
Mark-to-market derivatives—Economic hedges (Generation) (a)(c)
$
488

 
Discounted
Cash Flow
 
Forward power price
 
$8
-
$176
(d) 
 
 
 
 
 
Forward gas price
 
$2.98
-
$16.63
(d) 
 
 
 
Option Model
 
Volatility percentage
 
15%
-
142%
 
Mark-to-market derivatives—
Proprietary trading (Generation) (a)(c)
$
3

 
Discounted
Cash Flow
 
Forward power price
 
$10
-
$176
(d) 
Mark-to-market derivatives
(ComEd)
$
(193
)
 
Discounted
Cash Flow
 
Forward heat rate (b)
 
8x
-
9x
 
 
 
 
 
 
Marketability reserve
 
3.5%
-
8%
 
 
 
 
 
 
Renewable factor
 
84%
-
128%
 
__________________________ 
(a)
The valuation techniques, unobservable inputs and ranges are the same for the asset and liability positions.
(b)
Quoted forward natural gas rates are utilized to project the forward power curve for the delivery of energy at specified future dates. The natural gas curve is extrapolated beyond its observable period to the end of the contract’s delivery.
(c)
The fair values do not include cash collateral held on level three positions of $26 million as of December 31, 2013
(d)
The upper ends of the ranges are driven by the winter power and gas prices in the New England region. Without the New England region, the upper ends of the ranges for power and gas would be approximately $100 and $5.70, respectively.