{"pre_text": ["note 8 2013 debt our long-term debt consisted of the following ( in millions ) : ."], "post_text": ["in december 2012 , we issued notes totaling $ 1.3 billion with a fixed interest rate of 4.07% ( 4.07 % ) maturing in december 2042 ( the new notes ) in exchange for outstanding notes totaling $ 1.2 billion with interest rates ranging from 5.50% ( 5.50 % ) to 8.50% ( 8.50 % ) maturing in 2023 to 2040 ( the old notes ) .", "in connection with the exchange , we paid a premium of $ 393 million , of which $ 225 million was paid in cash and $ 168 million was in the form of new notes .", "this premium , in addition to $ 194 million in remaining unamortized discounts related to the old notes , will be amortized as additional interest expense over the term of the new notes using the effective interest method .", "we may , at our option , redeem some or all of the new notes at any time by paying the principal amount of notes being redeemed plus a make-whole premium and accrued and unpaid interest .", "interest on the new notes is payable on june 15 and december 15 of each year , beginning on june 15 , 2013 .", "the new notes are unsecured senior obligations and rank equally in right of payment with all of our existing and future unsecured and unsubordinated indebtedness .", "on september 9 , 2011 , we issued $ 2.0 billion of long-term notes in a registered public offering consisting of $ 500 million maturing in 2016 with a fixed interest rate of 2.13% ( 2.13 % ) , $ 900 million maturing in 2021 with a fixed interest rate of 3.35% ( 3.35 % ) , and $ 600 million maturing in 2041 with a fixed interest rate of 4.85% ( 4.85 % ) .", "we may , at our option , redeem some or all of the notes at any time by paying the principal amount of notes being redeemed plus a make-whole premium and accrued and unpaid interest .", "interest on the notes is payable on march 15 and september 15 of each year , beginning on march 15 , 2012 .", "in october 2011 , we used a portion of the proceeds to redeem all of our $ 500 million long-term notes maturing in 2013 .", "in 2011 , we repurchased $ 84 million of our long-term notes through open-market purchases .", "we paid premiums of $ 48 million in connection with the early extinguishments of debt , which were recognized in other non-operating income ( expense ) , net .", "in august 2011 , we entered into a $ 1.5 billion revolving credit facility with a group of banks and terminated our existing $ 1.5 billion revolving credit facility that was to expire in june 2012 .", "the credit facility expires august 2016 , and we may request and the banks may grant , at their discretion , an increase to the credit facility by an additional amount up to $ 500 million .", "there were no borrowings outstanding under either facility through december 31 , 2012 .", "borrowings under the credit facility would be unsecured and bear interest at rates based , at our option , on a eurodollar rate or a base rate , as defined in the credit facility .", "each bank 2019s obligation to make loans under the credit facility is subject to , among other things , our compliance with various representations , warranties and covenants , including covenants limiting our ability and certain of our subsidiaries 2019 ability to encumber assets and a covenant not to exceed a maximum leverage ratio , as defined in the credit facility .", "the leverage ratio covenant excludes the adjustments recognized in stockholders 2019 equity related to postretirement benefit plans .", "as of december 31 , 2012 , we were in compliance with all covenants contained in the credit facility , as well as in our debt agreements .", "we have agreements in place with banking institutions to provide for the issuance of commercial paper .", "there were no commercial paper borrowings outstanding during 2012 or 2011 .", "if we were to issue commercial paper , the borrowings would be supported by the credit facility .", "during the next five years , we have scheduled long-term debt maturities of $ 150 million due in 2013 and $ 952 million due in 2016 .", "interest payments were $ 378 million in 2012 , $ 326 million in 2011 , and $ 337 million in 2010. ."], "table": [["", "2012", "2011"], ["notes with rates from 2.13% ( 2.13 % ) to 6.15% ( 6.15 % ) due 2016 to 2042", "$ 5642", "$ 5308"], ["notes with rates from 7.00% ( 7.00 % ) to 7.75% ( 7.75 % ) due 2013 to 2036", "1080", "1239"], ["other debt", "478", "19"], ["total long-term debt", "7200", "6966"], ["less : unamortized discounts", "-892 ( 892 )", "-506 ( 506 )"], ["total long-term debt net of unamortized discounts", "6308", "6460"], ["less : current maturities of long-term debt", "-150 ( 150 )", "2014"], ["total long-term debt net", "$ 6158", "$ 6460"]], "table_ori": [["", "2012", "2011"], ["Notes with rates from 2.13% to 6.15%, due 2016 to 2042", "$5,642", "$5,308"], ["Notes with rates from 7.00% to 7.75%, due 2013 to 2036", "1,080", "1,239"], ["Other debt", "478", "19"], ["Total long-term debt", "7,200", "6,966"], ["Less: unamortized discounts", "(892)", "(506)"], ["Total long-term debt, net of unamortized discounts", "6,308", "6,460"], ["Less: current maturities of long-term debt", "(150)", "—"], ["Total long-term debt, net", "$6,158", "$6,460"]]}

Question: what is the percentage change in interest payments from 2011 to 2012?
Evidence:
text_24: interest payments were $ 378 million in 2012 , $ 326 million in 2011 , and $ 337 million in 2010. .
Program: subtract(378, 326), divide(#0, 326)
Answer:
str_answer: 16.0%
exe_answer: 0.15951