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Derivative Instruments (Tables)
 12 Months Ended
Dec. 31, 2013
Derivative Instruments [Abstract]  
Schedule of Notional Amounts of Outstanding Derivative Positions
As of December 31, 2013 and 2012, the net forward notional buy (sell) position of our outstanding commodity and interest rate swap contracts that did not qualify or were not designated under the normal purchase normal sale exemption were as follows (in millions):
Derivative Instruments
 
Notional Amounts
 
2013
 
2012
Power (MWh)
 
(29
)
 
(16
)
Natural gas (MMBtu)
 
448

 
66

Interest rate swaps
 
$
1,527

 
$
1,602
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value
The following tables present the fair values of our net derivative instruments recorded on our Consolidated Balance Sheets by location and hedge type at December 31, 2013 and 2012 (in millions):
 
December 31, 2013
  
Commodity
Instruments
 
Interest Rate
Swaps
 
Total
Derivative
Instruments
Balance Sheet Presentation
 
 
 
 
 
Current derivative assets
$
445

 
$
—

 
$
445

Long-term derivative assets
96

 
9

 
105

Total derivative assets
$
541

 
$
9

 
$
550

 
 
 
 
 
 
Current derivative liabilities
$
404

 
$
47

 
$
451

Long-term derivative liabilities
161

 
82

 
243

Total derivative liabilities
$
565

 
$
129

 
$
694

Net derivative assets (liabilities)
$
(24
)
 
$
(120
)
 
$
(144
)

 
December 31, 2012
 
Commodity
Instruments
 
Interest Rate
Swaps
 
Total
Derivative
Instruments
Balance Sheet Presentation
 
 
 
 
 
Current derivative assets
$
339

 
$
—

 
$
339

Long-term derivative assets
94

 
4

 
98

Total derivative assets
$
433

 
$
4

 
$
437

 
 
 
 
 
 
Current derivative liabilities
$
317

 
$
40

 
$
357

Long-term derivative liabilities
133

 
160

 
293

Total derivative liabilities
$
450

 
$
200

 
$
650

Net derivative assets (liabilities)
$
(17
)
 
$
(196
)
 
$
(213
)
Derivative Instrument by Accounting Designation
 
December 31, 2013
 
December 31, 2012
 
Fair Value
of Derivative
Assets
 
Fair Value
of Derivative
Liabilities
 
Fair Value
of Derivative
Assets
 
Fair Value
of Derivative
Liabilities
Derivatives designated as cash flow hedging instruments:
 
 
 
 
 
 
 
Interest rate swaps
$
9

 
$
115

 
$
4

 
$
184

Total derivatives designated as cash flow hedging instruments
$
9

 
$
115

 
$
4

 
$
184

 
 
 
 
 
 
 
 
Derivatives not designated as hedging instruments:
 
 
 
 
 
 
 
Commodity instruments
$
541

 
$
565

 
$
433

 
$
450

Interest rate swaps
—

 
14

 
—

 
16

Total derivatives not designated as hedging instruments
$
541

 
$
579

 
$
433

 
$
466

Total derivatives
$
550

 
$
694

 
$
437

 
$
650
Offsetting Assets [Table Text Block]
The tables below set forth our net exposure to derivative instruments after offsetting amounts subject to a master netting arrangement with the same counterparty at December 31, 2013 and 2012 (in millions):
 
 
December 31, 2013
 
 
Gross Amounts Not Offset on the Consolidated Balance Sheets
 
 
Gross Amounts Presented on our Consolidated Balance Sheets
 
Derivative Asset (Liability) not Offset on the Consolidated Balance Sheets
 
Margin/Cash (Received) Posted (1)
 
Net Amount
Derivative assets:
 
 
 
 
 
 
 
 
Commodity exchange traded futures and swaps contracts
 
$
434

 
$
(420
)
 
$
(14
)
 
$
—

Commodity forward contracts
 
107

 
(60
)
 
—

 
47

Interest rate swaps
 
9

 
—

 
—

 
9

Total derivative assets
 
$
550

 
$
(480
)
 
$
(14
)
 
$
56

Derivative (liabilities):
 
 
 
 
 
 
 
 
Commodity exchange traded futures and swaps contracts
 
$
(495
)
 
$
420

 
$
75

 
$
—

Commodity forward contracts
 
(70
)
 
60

 
1

 
(9
)
Interest rate swaps
 
(129
)
 
—

 
—

 
(129
)
Total derivative (liabilities)
 
$
(694
)
 
$
480

 
$
76

 
$
(138
)
Net derivative assets (liabilities)
 
$
(144
)
 
$
—

 
$
62

 
$
(82
)
 
 
December 31, 2012
 
 
Gross Amounts Not Offset on the Consolidated Balance Sheets
 
 
Gross Amounts Presented on our Consolidated Balance Sheets
 
Derivative Asset (Liability) not Offset on the Consolidated Balance Sheets
 
Margin/Cash (Received) Posted (1)
 
Net Amount
Derivative assets:
 
 
 
 
 
 
 
 
Commodity exchange traded futures and swaps contracts
 
$
385

 
$
(379
)
 
$
(6
)
 
$
—

Commodity forward contracts
 
48

 
(17
)
 
(1
)
 
30

Interest rate swaps
 
4

 
—

 
—

 
4

Total derivative assets
 
$
437

 
$
(396
)
 
$
(7
)
 
$
34

Derivative (liabilities):
 
 
 
 
 
 
 
 
Commodity exchange traded futures and swaps contracts
 
$
(424
)
 
$
379

 
$
45

 
$
—

Commodity forward contracts
 
(26
)
 
17

 
1

 
(8
)
Interest rate swaps
 
(200
)
 
—

 
—

 
(200
)
Total derivative (liabilities)
 
$
(650
)
 
$
396

 
$
46

 
$
(208
)
Net derivative assets (liabilities)
 
$
(213
)
 
$
—

 
$
39

 
$
(174
)
____________
(1)
Negative balances represent margin deposits posted with us by our counterparties related to our derivative activities that are subject to a master netting arrangement. Positive balances reflect margin deposits posted by us with our counterparties related to our derivative activities that are subject to a master netting arrangement. See Note 9 for a further discussion of our collateral.
Realized Unrealized Gain Loss by Instrument
The following tables detail the components of our total mark-to-market activity for both the net realized gain (loss) and the net unrealized gain (loss) recognized from our derivative instruments in earnings and where these components were recorded on our Consolidated Statements of Operations for the years ended December 31, 2013, 2012 and 2011 (in millions):
 
2013
 
2012
 
2011
Realized gain (loss)(1)
 
 
 
 
 
Commodity derivative instruments
$
86

 
$
387

 
$
143

Interest rate swaps
—

 
(157
)
 
(193
)
Total realized gain (loss)
$
86

 
$
230

 
$
(50
)
 
 
 
 
 
 
Unrealized gain (loss)(2)
 
 
 
 
 
Commodity derivative instruments
$
(14
)
 
$
(82
)
 
$
(25
)
Interest rate swaps
2

 
154

 
55

Total unrealized gain (loss)
$
(12
)
 
$
72

 
$
30

Total mark-to-market activity, net
$
74

 
$
302

 
$
(20
)
___________
(1)
Does not include the realized value associated with derivative instruments that settle through physical delivery.
(2)
In addition to changes in market value on derivatives not designated as hedges, changes in unrealized gain (loss) also includes hedge ineffectiveness and adjustments to reflect changes in credit default risk exposure.
Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]
 
2013
 
2012
 
2011
Realized and unrealized gain (loss)
 
 
 
 
 
Derivatives contracts included in operating revenues
$
(119
)
 
$
187

 
$
(20
)
Derivatives contracts included in fuel and purchased energy expense
191

 
118

 
138

Interest rate swaps included in interest expense
2

 
11

 
7

Loss on interest rate derivatives
—

 
(14
)
 
(145
)
Total mark-to-market activity, net
$
74

 
$
302

 
$
(20
)
Derivatives Designated as Hedges
The following table details the effect of our net derivative instruments that qualified for hedge accounting treatment and are included in OCI and AOCI for the years ended December 31, 2013, 2012 and 2011 (in millions):
 
Gains (Loss) Recognized  in
OCI (Effective Portion)(3)
 
Gain (Loss) Reclassified  from
AOCI into Income (Effective
Portion)(4)
 
2013
 
2012
 
2011
 
2013
 
2012
 
2011
 
Affected Line Item on the Consolidated Statements of Operations
Commodity derivative instruments(1):
 
 
 
 
 
 
 
 
 
 
 
 
 
Power derivative instruments
$
—

 
$
(97
)
 
$
(99
)
 
$
—

 
$
118

 
$
236

 
Commodity revenue
Natural gas derivative instruments
—

 
59

 
28

 
—

 
(66
)
 
(73
)
 
Commodity expense
Interest rate swaps(2)
86

 
(43
)
 
(23
)
 
(51
)
(5) 
(32
)
 
(47
)
(6) 
Interest expense
Interest rate swaps
—

 
—

 
—

 
—

 
—

 
(91
)
(6) 
Loss on interest rate derivatives
Total(3)
$
86

 
$
(81
)
 
$
(94
)
 
$
(51
)
 
$
20

 
$
25

 
 
____________
(1)
There were no commodity derivative instruments designated as cash flow hedges during the year ended December 31, 2013. We recorded a gain on hedge ineffectiveness of $2 million and a loss of $2 million related to our commodity derivative instruments designated as cash flow hedges during the years ended December 31, 2012 and 2011, respectively.
(2)
We did not record any gain (loss) on hedge ineffectiveness related to our interest rate swaps designated as cash flow hedges during the years ended December 31, 2013 and 2012. We recorded a loss of $1 million on hedge ineffectiveness related to our interest rate swaps designated as cash flow hedges for the year ended December 31, 2011.
(3)
We recorded income tax expense of $3 million for the year ended December 31, 2013, and an income tax benefit of $11 million and $44 million for the years ended December 31, 2012 and 2011, respectively, in AOCI related to our cash flow hedging activities.
(4)
Cumulative cash flow hedge losses attributable to Calpine, net of tax, remaining in AOCI were $148 million, $222 million and $158 million at December 31, 2013, 2012 and 2011, respectively. Cumulative cash flow hedge losses attributable to the noncontrolling interest, net of tax, remaining in AOCI were $11 million, $20 million and $14 million at December 31, 2013, 2012 and 2011, respectively.
(5)
Includes a loss of $12 million that was reclassified from AOCI to interest expense for the year ended December 31, 2013 where the hedged transactions are no longer expected to occur.
(6)
Includes a loss of $15 million and $91 million that was reclassified from AOCI to interest expense and loss on interest rate derivatives, respectively, for the year ended December 31, 2011 where the hedged transactions are no longer expected to occur.