2022 triggering our obligation to make payments under any financial guarantee , letter of credit or other credit support we have provided to or on behalf of such subsidiary ; 2022 causing us to record a loss in the event the lender forecloses on the assets ; and 2022 triggering defaults in our outstanding debt at the parent company . for example , our senior secured credit facility and outstanding debt securities at the parent company include events of default for certain bankruptcy related events involving material subsidiaries . in addition , our revolving credit agreement at the parent company includes events of default related to payment defaults and accelerations of outstanding debt of material subsidiaries . some of our subsidiaries are currently in default with respect to all or a portion of their outstanding indebtedness . the total non-recourse debt classified as current in the accompanying consolidated balance sheets amounts to $ 2.2 billion . the portion of current debt related to such defaults was $ 1 billion at december 31 , 2017 , all of which was non-recourse debt related to three subsidiaries 2014 alto maipo , aes puerto rico , and aes ilumina . see note 10 2014debt in item 8 . 2014financial statements and supplementary data of this form 10-k for additional detail . none of the subsidiaries that are currently in default are subsidiaries that met the applicable definition of materiality under aes' corporate debt agreements as of december 31 , 2017 in order for such defaults to trigger an event of default or permit acceleration under aes' indebtedness . however , as a result of additional dispositions of assets , other significant reductions in asset carrying values or other matters in the future that may impact our financial position and results of operations or the financial position of the individual subsidiary , it is possible that one or more of these subsidiaries could fall within the definition of a "material subsidiary" and thereby upon an acceleration trigger an event of default and possible acceleration of the indebtedness under the parent company's outstanding debt securities . a material subsidiary is defined in the company's senior secured revolving credit facility as any business that contributed 20% ( 20 % ) or more of the parent company's total cash distributions from businesses for the four most recently completed fiscal quarters . as of december 31 , 2017 , none of the defaults listed above individually or in the aggregate results in or is at risk of triggering a cross-default under the recourse debt of the company . contractual obligations and parent company contingent contractual obligations a summary of our contractual obligations , commitments and other liabilities as of december 31 , 2017 is presented below and excludes any businesses classified as discontinued operations or held-for-sale ( in millions ) : contractual obligations total less than 1 year more than 5 years other footnote reference ( 4 ) debt obligations ( 1 ) $ 20404 $ 2250 $ 2431 $ 5003 $ 10720 $ 2014 10 interest payments on long-term debt ( 2 ) 9103 1172 2166 1719 4046 2014 n/a .
what percentage of total contractual obligations , commitments and other liabilities as of december 31 , 2017 is composed of fuel obligations?
_____________________________ ( 1 ) includes recourse and non-recourse debt presented on the consolidated balance sheet . these amounts exclude capital lease obligations which are included in the capital lease category . ( 2 ) interest payments are estimated based on final maturity dates of debt securities outstanding at december 31 , 2017 and do not reflect anticipated future refinancing , early redemptions or new debt issuances . variable rate interest obligations are estimated based on rates as of december 31 , 2017 . ( 3 ) these amounts do not include current liabilities on the consolidated balance sheet except for the current portion of uncertain tax obligations . noncurrent uncertain tax obligations are reflected in the "other" column of the table above as the company is not able to reasonably estimate the timing of the future payments . in addition , these amounts do not include : ( 1 ) regulatory liabilities ( see note 9 2014regulatory assets and liabilities ) , ( 2 ) contingencies ( see note 12 2014contingencies ) , ( 3 ) pension and other postretirement employee benefit liabilities ( see note 13 2014benefit plans ) , ( 4 ) derivatives and incentive compensation ( see note 5 2014derivative instruments and hedging activities ) or ( 5 ) any taxes ( see note 20 2014income taxes ) except for uncertain tax obligations , as the company is not able to reasonably estimate the timing of future payments . see the indicated notes to the consolidated financial statements included in item 8 of this form 10-k for additional information on the items excluded . ( 4 ) for further information see the note referenced below in item 8 . 2014financial statements and supplementary data of this form 10-k. .