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Network
2428406 - Disclosure - Income Taxes (Income Tax Contingencies) (Details)
(http://www.calpine.com/role/IncomeTaxesIncomeTaxContingenciesDetails)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000916457 (http://www.sec.gov/CIK)
Income Tax Disclosure [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
Income Tax Disclosure [Abstract]
 
 
 
Balance, beginning of period
(58,000,000) 
(56,000,000) 
(68,000,000) 
Increases related to prior year tax positions
0  
0  
(4,000,000) 
Decreases related to prior year tax positions
1,000,000  
3,000,000  
8,000,000  
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions
(2,000,000) 
(5,000,000) 
0  
Settlements
0  
0  
8,000,000  
Balance, end of period
(59,000,000) 
 
(58,000,000) 
 
(56,000,000)