Consolidated Condensed Balance Sheets (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents ($136 and $242 attributable to VIEs)	$ 442	$ 941
Accounts receivable, net of allowance of $7 and $5	762	552
Inventories	374	364
Margin deposits and other prepaid expense	303	309
Restricted cash, current ($122 and $100 attributable to VIEs)	191	203
Derivative assets, current	746	445
Current assets held for sale	808	0
Other current assets	76	42
Total current assets	3,702	2,856
Property, plant and equipment, net ($4,542 and $4,191 attributable to VIEs)	12,844	12,995
Restricted cash, net of current portion ($66 and $68 attributable to VIEs)	66	69
Investments in power plants	92	93
Long-term derivative assets	236	105
Other assets ($196 and $195 attributable to VIEs)	430	441
Total assets	17,370	16,559
Current liabilities:
Accounts payable	614	462
Accrued interest payable	189	162
Debt, current portion ($134 and $140 attributable to VIEs)	189	204
Derivative liabilities, current	706	451
Current liabilities held for sale	9	0
Other current liabilities	439	252
Total current liabilities	2,146	1,531
Debt, net of current portion ($3,303 and $2,923 attributable to VIEs)	11,260	10,908
Long-term derivative liabilities	248	243
Other long-term liabilities	302	309
Total liabilities	13,956	12,991
Commitments and contingencies (see Note 12)
Stockholders’ equity:
Preferred stock, $0.001 par value per share; authorized 100,000,000 shares, none issued and outstanding	0	0
Common stock, $0.001 par value per share; authorized 1,400,000,000 shares, 500,563,630 and 497,841,056 shares issued, respectively, and 417,133,226 and 429,038,988 shares outstanding, respectively	1	1
Treasury stock, at cost, 83,430,404 and 68,802,068 shares, respectively	(1,535)	(1,230)
Additional paid-in capital	12,421	12,389
Accumulated deficit	(7,364)	(7,486)
Accumulated other comprehensive loss	(168)	(160)
Total Calpine stockholders’ equity	3,355	3,514
Noncontrolling interest	59	54
Total stockholders’ equity	3,414	3,568
Total liabilities and stockholders’ equity	$ 17,370	$ 16,559