Consolidated Condensed Statements of Operations - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Operating revenues:
Commodity revenue	$ 2,063	$ 1,888	$ 5,199	$ 4,933
Mark-to-market gain (loss)	287	55	(79)	89
Other revenue	5	5	14	14
Operating revenues	2,355	1,948	5,134	5,036
Operating expenses:
Commodity expense	1,294	943	3,197	2,754
Mark-to-market (gain) loss	178	130	(57)	95
Fuel and purchased energy expense	1,472	1,073	3,140	2,849
Plant operating expense	215	200	741	732
Depreciation and amortization expense	161	166	503	484
Sales, general and other administrative expense	33	33	106	100
Other operating expenses	18	16	55	56
Total operating expenses	1,899	1,488	4,545	4,221
(Income) from unconsolidated investments in power plants	(6)	(6)	(16)	(18)
Income from operations	462	466	605	833
Interest expense	158	159	472	471
Interest (income)	(1)	(1)	(3)	(3)
Debt modification and extinguishment costs	0	0	15	32
Other (income) expense, net	8	1	21	8
Income before income taxes	297	307	100	325
Income tax expense (benefit)	(4)	28	17	32
Net income (loss)	301	279	83	293
Net income attributable to the noncontrolling interest	(6)	(6)	(15)	(11)
Net income attributable to Calpine	$ 295	$ 273	$ 68	$ 282
Basic earnings per common share attributable to Calpine:
Weighted average number of shares outstanding, basic	354,215	355,443	353,929	365,053
Earnings per share, basic	$ 0.83	$ 0.77	$ 0.19	$ 0.77
Weighted Average Number of Shares Outstanding, Diluted	356,352	357,676	355,980	368,219
Earnings Per Share, Diluted	$ 0.83	$ 0.76	$ 0.19	$ 0.77