item 15 . exhibits , financial statement schedules . ( continued ) kinder morgan , inc . form 10-k .

25.0 8.2 (1): kinder morgan operating l.p . 201cb 201d-jackson-union cos . il revenue bonds due april 1 2024: 23.7
international marine terminals-plaquemines la revenue bonds due march 15 2025: 40
other miscellaneous subsidiary debt: 1.3
unamortized debt discount on long-term debt: -20.3
current maturities of long-term debt: -1263.3
total long-term debt 2013 kmp: 10282.8
25.0 8.2 (2): kinder morgan operating l.p . 201cb 201d-jackson-union cos . il revenue bonds due april 1 2024: 23.7
international marine terminals-plaquemines la revenue bonds due march 15 2025: 40
other miscellaneous subsidiary debt: 1.3
unamortized debt discount on long-term debt: -21.2
current maturities of long-term debt: -596.6
total long-term debt 2013 kmp: 10007.5

____________ ( a ) as a result of the implementation of asu 2009-17 , effective january 1 , 2010 , we ( i ) include the transactions and balances of our business trust , k n capital trust i and k n capital trust iii , in our consolidated financial statements and ( ii ) no longer include our junior subordinated deferrable interest debentures issued to the capital trusts ( see note 18 201crecent accounting pronouncements 201d ) . ( b ) kmp issued its $ 500 million in principal amount of 9.00% ( 9.00 % ) senior notes due february 1 , 2019 in december 2008 . each holder of the notes has the right to require kmp to repurchase all or a portion of the notes owned by such holder on february 1 , 2012 at a purchase price equal to 100% ( 100 % ) of the principal amount of the notes tendered by the holder plus accrued and unpaid interest to , but excluding , the repurchase date . on and after february 1 , 2012 , interest will cease to accrue on the notes tendered for repayment . a holder 2019s exercise of the repurchase option is irrevocable . kinder morgan kansas , inc . the 2028 and 2098 debentures and the 2012 and 2015 senior notes are redeemable in whole or in part , at kinder morgan kansas , inc . 2019s option at any time , at redemption prices defined in the associated prospectus supplements . the 2027 debentures are redeemable in whole or in part , at kinder morgan kansas , inc . 2019s option after november 1 , 2004 at redemption prices defined in the associated prospectus supplements . on september 2 , 2010 , kinder morgan kansas , inc . paid the remaining $ 1.1 million principal balance outstanding on kinder morgan kansas , inc . 2019s 6.50% ( 6.50 % ) series debentures , due 2013 . kinder morgan finance company , llc on december 20 , 2010 , kinder morgan finance company , llc , a wholly owned subsidiary of kinder morgan kansas , inc. , completed a public offering of senior notes . it issued a total of $ 750 million in principal amount of 6.00% ( 6.00 % ) senior notes due january 15 , 2018 . net proceeds received from the issuance of the notes , after underwriting discounts and commissions , were $ 744.2 million , which were used to retire the principal amount of the 5.35% ( 5.35 % ) senior notes that matured on january 5 , 2011 . the 2011 , 2016 , 2018 and 2036 senior notes issued by kinder morgan finance company , llc are redeemable in whole or in part , at kinder morgan kansas , inc . 2019s option at any time , at redemption prices defined in the associated prospectus supplements . each series of these notes is fully and unconditionally guaranteed by kinder morgan kansas , inc . on a senior unsecured basis as to principal , interest and any additional amounts required to be paid as a result of any withholding or deduction for canadian taxes . capital trust securities kinder morgan kansas , inc . 2019s business trusts , k n capital trust i and k n capital trust iii , are obligated for $ 12.7 million of 8.56% ( 8.56 % ) capital trust securities maturing on april 15 , 2027 and $ 14.4 million of 7.63% ( 7.63 % ) capital trust securities maturing on april 15 , 2028 , respectively , which it guarantees . the 2028 securities are redeemable in whole or in part , at kinder morgan kansas , inc . 2019s option at any time , at redemption prices as defined in the associated prospectus . the 2027 securities are redeemable in whole or in part at kinder morgan kansas , inc . 2019s option and at any time in certain limited circumstances upon the occurrence of certain events and at prices , all defined in the associated prospectus supplements . upon redemption by kinder morgan kansas , inc . or at maturity of the junior subordinated deferrable interest debentures , it must use the proceeds to make redemptions of the capital trust securities on a pro rata basis. .

Questions:
what was the amount of the current maturities of long-term debt?
and what was the total long-term debt for the first column?
what was, then, that amount as a portion of this long-term debt?
and what is that in percentage?
and concerning that amount and the total long-term debt, what was the combined total of both, in millions?

Answers:
-1263.3
10282.8
-0.122
-12.2%
11546.1