Commitments and Contingencies (Tables)

The total contractual future minimum lease rentals for our contracts accounted for as operating leases at December 31, 2016, are as follows (in millions):



2017	$	397
2018	360
2019	320
2020	261
2021	257
Thereafter	604
Total	$	2,199

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



	Initial Year	2017		2018		2019		2020		2021		Thereafter		Total
Land and other operating leases	various	$	13	$	13	$	13	$	12	$	12	$	176	$	239
Power plant operating lease	2000	22		22		30		—		—		—		74
Total leases		$	35	$	35	$	43	$	12	$	12	$	176	$	313

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



2017	$	13
2018	13
2019	12
2020	12
2021	1
Thereafter	—
Total	$	51

At December 31, 2016, we had future commitments for the purchase, transportation, or storage of commodities as detailed below (in millions):



2017	$	285
2018	201
2019	118
2020	89
2021	70
Thereafter	539
Total	$	1,302

At December 31, 2016, guarantees of subsidiary debt, standby letters of credit and surety bonds to third parties and the guarantee under our Account Receivable Sales Program and their respective expiration dates were as follows (in millions):



Guarantee Commitments	2017		2018		2019		2020		2021		Thereafter		Total
Guarantee of subsidiary debt⁽¹⁾	$	26	$	31	$	30	$	30	$	29	$	90	$	236
Standby letters of credit^(2)(3)(4)	855		98		—		—		—		38		991
Surety bonds^(4)(5)(6)	15		—		—		—		—		11		26
Guarantee under Accounts Receivable Sales Program⁽⁷⁾	211		—		—		—		—		—		211
Total	$	1,107	$	129	$	30	$	30	$	29	$	139	$	1,464

____________


(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)	These are contingent off balance sheet obligations.


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


(6)	As of December 31, 2016, no cash collateral is outstanding related to these bonds.


(7)	Calpine has guaranteed the performance of Calpine Solutions under the Accounts Receivable Sales Program. The Accounts Receivable Sales Program expires on December 1, 2017.