{"pre_text": ["the following table presents a rollforward of the severance and other costs for approximately 1650 employees included in the 2010 restructuring charg- in millions severance and other ."], "post_text": ["as of december 31 , 2012 , 1638 employees had left the company under these programs .", "cellulosic bio-fuel tax credit in a memorandum dated june 28 , 2010 , the irs concluded that black liquor would qualify for the cellulosic bio-fuel tax credit of $ 1.01 per gallon pro- duced in 2009 .", "on october 15 , 2010 , the irs ruled that companies may qualify in the same year for the $ 0.50 per gallon alternative fuel mixture credit and the $ 1.01 cellulosic bio-fuel tax credit for 2009 , but not for the same gallons of fuel produced and con- sumed .", "to the extent a taxpayer changes its position and uses the $ 1.01 credit , it must re-pay the refunds they received as alternative fuel mixture credits attributable to the gallons converted to the cellulosic bio-fuel credit .", "the repayment of this refund must include interest .", "one important difference between the two credits is that the $ 1.01 credit must be credited against a company 2019s federal tax liability , and the credit may be carried forward through 2015 .", "in contrast , the $ 0.50 credit is refundable in cash .", "also , the cellulosic bio- fuel credit is required to be included in federal tax- able income .", "the company filed an application with the irs on november 18 , 2010 , to receive the required registra- tion code to become a registered cellulosic bio-fuel producer .", "the company received its registration code on february 28 , 2011 .", "the company has evaluated the optimal use of the two credits with respect to gallons produced in 2009 .", "considerations include uncertainty around future federal taxable income , the taxability of the alter- native fuel mixture credit , future liquidity and uses of cash such as , but not limited to , acquisitions , debt repayments and voluntary pension contributions versus repayment of alternative fuel mixture credits with interest .", "at the present time , the company does not intend to convert any gallons under the alter- native fuel mixture credit to gallons under the cellulosic bio-fuel credit .", "on july 19 , 2011 the com- pany filed an amended 2009 tax return claiming alternative fuel mixture tax credits as non-taxable income .", "if that amended position is not upheld , the company will re-evaluate its position with regard to alternative fuel mixture gallons produced in 2009 .", "during 2009 , the company produced 64 million gal- lons of black liquor that were not eligible for the alternative fuel mixture credit .", "the company claimed these gallons for the cellulosic bio-fuel credit by amending the company 2019s 2009 tax return .", "the impact of this amendment was included in the company 2019s 2010 fourth quarter income tax provision ( benefit ) , resulting in a $ 40 million net credit to tax expense .", "temple-inland , inc .", "also recognized an income tax benefit of $ 83 million in 2010 related to cellulosic bio-fuel credits .", "as is the case with other tax credits , taxpayer claims are subject to possible future review by the irs which has the authority to propose adjustments to the amounts claimed , or credits received .", "note 5 acquisitions and joint ventures acquisitions 2013 : on january 3 , 2013 , international paper completed the acquisition ( effective date of acquis- ition on january 1 , 2013 ) of the shares of its joint venture partner , sabanci holding , in the turkish corrugated packaging company , olmuksa interna- tional paper sabanci ambalaj sanayi ve ticaret a.s .", "( olmuksa ) , for a purchase price of $ 56 million .", "the acquired shares represent 43.7% ( 43.7 % ) of olmuksa 2019s shares , and prior to this acquisition , international paper already held a 43.7% ( 43.7 % ) equity interest in olmuk- sa .", "thus , international paper now owns 87.4% ( 87.4 % ) of olmuksa 2019s outstanding and issued shares .", "the company has not completed the valuation of assets acquired and liabilities assumed ; however , the company anticipates providing a preliminary pur- chase price allocation in its 2013 first quarter form 10-q filing .", "because the transaction resulted in international paper becoming the majority shareholder , owning 87.4% ( 87.4 % ) of olmuksa 2019s shares , its completion triggered a mandatory call for tender of the remaining public shares .", "also as a result of international paper taking majority control of the entity , olmuksa 2019s financial results will be consolidated with our industrial pack- aging segment beginning with the effective date international paper obtained majority control of the entity on january 1 , 2013 .", "pro forma information related to the acquisition of olmuksa has not been included as it does not have a material effect on the company 2019s consolidated results of operations .", "2012 : on february 13 , 2012 , international paper com- pleted the acquisition of temple-inland , inc .", "( temple- inland ) .", "international paper acquired all of the outstanding common stock of temple-inland for $ 32.00 per share in cash , totaling approximately $ 3.7 billion ."], "table": [["in millions", "severance and other"], ["opening balance ( recorded first quarter 2010 )", "$ 20"], ["additions and adjustments", "26"], ["cash charges in 2010", "-32 ( 32 )"], ["cash charges in 2011", "-8 ( 8 )"], ["cash charges in 2012", "-4 ( 4 )"], ["balance december 31 2012", "$ 2"]], "table_ori": [["In millions", "Severance and Other"], ["Opening balance (recorded first quarter 2010)", "$20"], ["Additions and adjustments", "26"], ["Cash charges in 2010", "(32)"], ["Cash charges in 2011", "(8)"], ["Cash charges in 2012", "(4)"], ["Balance, December 31, 2012", "$2"]]}

Question: based on the review of the table what was the net change in the restructuring charg- in millions severance and other in millions
Evidence:
table_1: in millions the opening balance ( recorded first quarter 2010 ) of severance and other is $ 20 ;
table_6: in millions the balance december 31 2012 of severance and other is $ 2 ;
Program: subtract(2, 20)
Answer:
str_answer: -18
exe_answer: -18