v3.3.1.900
Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Operating revenues:      
Commodity revenue $ 6,389 $ 7,595 $ 6,374
Mark to Market Gain Loss on Derivatives included in Operating Revenues 65 419 (86)
Other revenue 18 16 13
Operating revenues 6,472 8,030 6,301
Operating expenses:      
Commodity expense 3,589 4,815 3,808
Mark to Market Gain Loss on Derivatives Included in Fuel and Purchased Energy Expense 178 77 (72)
Fuel and purchased energy expense 3,767 4,892 3,736
Plant operating expense 1,018 969 895
Depreciation and amortization expense 638 603 593
Sales, general and other administrative expense 138 144 136
Other operating expenses 80 88 81
Total operating expenses 5,641 6,696 5,441
Impairment losses 0 123 16
(Gain) on sale of assets, net 0 (753) 0
(Income) from unconsolidated investments in power plants (24) (25) (30)
Income from operations 855 1,989 874
Interest expense 628 645 696
Interest (income) (4) (6) (6)
Debt modification and extinguishment costs 40 346 144
Other (income) expense, net 18 21 20
Income before income taxes 173 983 20
Income tax expense (benefit) (76) 22 2
Net income 249 961 18
Net income attributable to the noncontrolling interest (14) (15) (4)
Net income attributable to Calpine $ 235 $ 946 $ 14
Basic earnings per common share attributable to Calpine:      
Weighted average shares of common stock outstanding (in shares) 362,033 404,837 440,666
Net income (loss) per common share attributable to Calpine — basic (in dollars per share) $ 0.65 $ 2.34 $ 0.03
Diluted earnings per common share attributable to Calpine:      
Weighted average shares of common stock outstanding (in shares) 364,886 409,360 444,773
Net income (loss) per common share attributable to Calpine — diluted (in dollars per share) $ 0.64 $ 2.31 $ 0.03