Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Power Plant and Land and Other Operating Leases

Leases — We have contracts, such as certain tolling agreements, which we account for as operating leases under U.S. GAAP. Generally, we levelize certain components of these contract revenues on a straight-line basis over the term of the contract. The total contractual future minimum lease rentals for our contracts accounted for as operating leases at December 31, 2014, are as follows (in millions):

2015	$	561
2016	495
2017	433
2018	396
2019	357
Thereafter	1,380
Total	$	3,622

Future minimum rent payments under these lease agreements, including renewal options and rent escalation clauses, are as follows (in millions):

	Initial Year	2015		2016		2017		2018		2019		Thereafter		Total
Land and other operating leases	various	$	15	$	16	$	15	$	15	$	15	$	201	$	277
Power plant operating leases:
Greenleaf	1998	$	4	$	—	$	—	$	—	$	—	$	—	$	4
KIAC	2000	23		22		22		22		30		—		119
Total power plant leases		$	27	$	22	$	22	$	22	$	30	$	—	$	123
Total leases		$	42	$	38	$	37	$	37	$	45	$	201	$	400

Schedule of Future Minimum Lease Payments for Office and Equipment Leases

Future minimum lease payments under these leases are as follows (in millions):

2015	$	11
2016	10
2017	9
2018	9
2019	8
Thereafter	8
Total	$	55

Schedule Of Future Minimum Payments For Commodities [Table Text Block]

At December 31, 2014, we had future commitments for the purchase, transportation, or storage of commodities as detailed below (in millions):

2015	$	390
2016	297
2017	193
2018	152
2019	109
Thereafter	622
Total	$	1,763

Schedule of Guarantor Obligations

At December 31, 2014, guarantees of subsidiary debt, standby letters of credit and surety bonds to third parties and guarantees of subsidiary operating lease payments and their respective expiration dates were as follows (in millions):

Guarantee Commitments	2015		2016		2017		2018		2019		Thereafter		Total
Guarantee of subsidiary debt(1)	$	37	$	36	$	26	$	31	$	30	$	148	$	308
Standby letters of credit(2)(3)(5)	572		14		20		—		—		38		644
Surety bonds(4)(5)(6)	—		—		—		—		—		4		4
Guarantee of subsidiary operating lease payments(5)	4		—		—		—		—		—		4
Total	$	613	$	50	$	46	$	31	$	30	$	190	$	960

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(1) Represents Calpine Corporation guarantees of certain power plant capital leases and related interest. All guaranteed capital leases are recorded on our Consolidated Balance Sheets.

(2) The standby letters of credit disclosed above represent those disclosed in Note 6.

(3) Letters of credit are renewed annually and as such all amounts are reflected in the year of letter of credit expiration. The related commercial obligations extend for multiple years, therefore, renewal of the letter of credit will likely follow the term of the associated commercial obligation.

(4) The majority of surety bonds do not have expiration or cancellation dates.

(5) These are contingent off balance sheet obligations.

(6) As of December 31, 2014, $2 million of cash collateral is outstanding related to these bonds.