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Revenue From Contracts with Customers (Tables)
 3 Months Ended
Mar. 31, 2018
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue [Table Text Block]
The following table represents a disaggregation of our revenue for the three months ended March 31, 2018 by reportable segment (in millions). See Note 13 for a description of our segments.
 
Wholesale
 
 
 
 
 
 
 
West
 
Texas
 
East
 
Retail
 
Elimination
 
Total
Third Party:
 
 
 
 
 
 
 
 
 
 
 
Energy & other products
$
199

 
$
304

 
$
132

 
$
443

 
$
—

 
$
1,078

Capacity
19

 
26

 
149

 
—

 
—

 
194

Revenues relating to physical or executory contracts – third party
$
218

 
$
330

 
$
281

 
$
443

 
$
—

 
$
1,272

 
 
 
 
 
 
 
 
 
 
 
 
Affiliate(1):
$
8

 
$
4

 
$
21

 
$
1

 
$
(34
)
 
$
—

 
 
 
 
 
 
 
 
 
 
 
 
Revenues relating to leases and derivative instruments(2)
 
 
 
 
 
 
 
 
 
 
$
737

Total operating revenues
 
 
 
 
 
 
 
 
 
 
$
2,009

___________
(1)
Affiliate energy, other and capacity revenues reflect revenues on transactions between wholesale and retail affiliates excluding affiliate activity related to leases and derivative instruments. All such activity supports retail supply needs from the wholesale business and/or allows for collateral margin netting efficiencies at Calpine Corporation.
(2)
Revenues relating to contracts accounted for as leases and derivatives include energy and capacity revenues relating to PPAs that we are required to account for as operating leases and physical and financial commodity derivative contracts, primarily relating to power, natural gas and environmental products. For revenue related to derivative instruments, includes revenue recorded in Commodity revenue and mark-to-market gain (loss) on our Consolidated Condensed Statement of Operations.