v3.6.0.2
Capital Structure (Tables)
 12 Months Ended
Dec. 31, 2016
Capital Structure [Abstract]  
Schedule of Common Stock Activity
The table below summarizes our common stock activity for the years ended December 31, 2016, 2015 and 2014.
 
Shares
Issued
 
Shares
Held in
Treasury
 
Shares
Outstanding
Balance, December 31, 2013
497,841,056

 
(68,802,068
)
 
429,038,988

Shares issued under Calpine Equity Incentive Plans
4,445,966

 
(1,879,167
)
 
2,566,799

Share repurchase program
—

 
(49,684,523
)
 
(49,684,523
)
Balance, December 31, 2014
502,287,022

 
(120,365,758
)
 
381,921,264

Shares issued under Calpine Equity Incentive Plans
2,431,236

 
(1,089,328
)
 
1,341,908

Share repurchase program
—

 
(26,601,168
)
 
(26,601,168
)
Retirement of shares held in treasury
(147,962,511
)
 
147,962,511

 
—

Balance, December 31, 2015
356,755,747

 
(93,743
)
 
356,662,004

Shares issued under Calpine Equity Incentive Plans
2,871,366

 
(449,079
)
 
2,422,287

Share repurchase program
—

 
(22,527
)
 
(22,527
)
Balance, December 31, 2016
359,627,113

 
(565,349
)
 
359,061,764