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Derivatives And Hedging Activities (Tables)
 12 Months Ended
Dec. 31, 2014
Derivatives And Hedging Activities [Abstract]  
Volumes Of Outstanding Derivative Contracts
 
 
 
 
Contract Volume
Underlying Product
 
Instruments
 
2014
 
2013
Natural Gas (1) (MMBtus (2))
 
Forwards and Swaps
 
308,130,101
 
331,840,788
 
 
Options
 
164,418,002
 
260,262,916
Electricity (Megawatt-hours)
 
Forwards and Swaps
 
5,346,787
 
8,089,269
 
 
Congestion Revenue Rights (3)
 
224,124,341
 
250,922,591
 
 
 
 
 
 
 
 (1) Amounts shown are for the combined positions of the electric fuels and core gas supply portfolios.
(2) Million British Thermal Units.
(3) CRRs are financial instruments that enable the holders to manage variability in congestion costs based on demand when there is insufficient transmission capacity.
Outstanding Derivative Balances
At December 31, 2014, the Utility's outstanding derivative balances were as follows:
 
 
Commodity Risk
 
Gross Derivative
 
 
 
 
 
Total Derivative
(in millions)
Balance
 
Netting
 
Cash Collateral
 
Balance
Current assets - other
$
73
 
$
(4
 ) 
$
19
 
$
88
Other noncurrent assets - other
 
178
 
 
(13
 ) 
 
-
 
 
165
Current liabilities - other
 
(78
 ) 
 
4
 
 
26
 
 
(48
)
Noncurrent liabilities - other
 
(140
 ) 
 
13
 
 
9
 
 
(118
)
Total commodity risk
$
33
 
$
-
 
$
54
 
$
87
 
 
At December 31, 2013, the Utility's outstanding derivative balances were as follows:
 
 
 
Commodity Risk
 
Gross Derivative
 
 
 
 
 
Total Derivative
(in millions)
Balance
 
Netting
 
Cash Collateral
 
Balance
Current assets - other
$
42
 
$
(10
 ) 
$
16
 
$
48
Other noncurrent assets - other
 
99
 
 
(4
 ) 
 
-
 
 
95
Current liabilities - other
 
(122
 ) 
 
10
 
 
69
 
 
(43
)
Noncurrent liabilities - other
 
(110
 ) 
 
4
 
 
2
 
 
(104
)
Total commodity risk
$
(91)
 
$
-
 
$
87
 
$
(4)
Gains And Losses On Derivative Instruments
 
Commodity Risk
 
For the year ended December 31,
(in millions)
2014
 
2013
 
2012
Unrealized gain/(loss) - regulatory assets and liabilities (1)
$
124
 
$
238
 
$
391
Realized loss - cost of electricity (2)
 
(83
 ) 
 
(178
 ) 
 
(486
)
Realized loss - cost of natural gas (2)
 
(8
 ) 
 
(22
 ) 
 
(38
)
Total commodity risk
$
33
 
$
38
 
$
(133)
 
 
 
 
 
 
 
 
 
 (1) Unrealized gains and losses on commodity risk-related derivative instruments are recorded to regulatory assets or liabilities, rather than being recorded to the  Consolidated Statements of Income.  These amounts exclude the impact of cash collateral postings.
(2) These amounts are fully passed through to customers in rates.  Accordingly, net income was not impacted by realized amounts on these instruments.
Additional Cash Collateral The Utility Would Be Required To Post If Its Credit Risk-Related Contingency Features Were Triggered
 
Balance at December 31,
(in millions)
2014
 
2013
Derivatives in a liability position with credit risk-related
 
 
 
 
 
 contingencies that are not fully collateralized
$
(47
 ) 
$
(79
)
Related derivatives in an asset position
 
-
 
 
4
Collateral posting in the normal course of business related to
 
 
 
 
 
these derivatives
 
44
 
 
65
Net position of derivative contracts/additional collateral
 
 
 
 
 
posting requirements (1)
$
(3)
 
$
(10)
 
 
 
 
 
 
 (1) This calculation excludes the impact of closed but unpaid positions, as their settlement is not impacted by any of the Utility's credit risk-related contingencies.