m .employee retirement plans 2013 ( continued ) of equities and fixed-income investments , and would be less liquid than financial instruments that trade on public markets .potential events or circumstances that could have a negative effect on estimated fair value include the risks of inadequate diversification and other operating risks .to mitigate these risks , investments are diversified across and within asset classes in support of investment objectives .policies and practices to address operating risks include ongoing manager oversight , plan and asset class investment guidelines and instructions that are communicated to managers , and periodic compliance and audit reviews to ensure adherence to these policies .in addition , the company periodically seeks the input of its independent advisor to ensure the investment policy is appropriate .the company sponsors certain post-retirement benefit plans that provide medical , dental and life insurance coverage for eligible retirees and dependents in the united states based upon age and length of service .the aggregate present value of the unfunded accumulated post-retirement benefit obligation was $ 13 million at both december 31 , 2010 and 2009 .cash flows at december 31 , 2010 , the company expected to contribute approximately $ 30 million to $ 35 million to its qualified defined-benefit pension plans to meet erisa requirements in 2011 .the company also expected to pay benefits of $ 3 million and $ 10 million to participants of its unfunded foreign and non-qualified ( domestic ) defined-benefit pension plans , respectively , in 2011 .at december 31 , 2010 , the benefits expected to be paid in each of the next five years , and in aggregate for the five years thereafter , relating to the company 2019s defined-benefit pension plans , were as follows , in millions : qualified non-qualified .           | qualified plans | non-qualified plans
2011      | $ 38            | $ 10               
2012      | $ 40            | $ 11               
2013      | $ 41            | $ 11               
2014      | $ 41            | $ 12               
2015      | $ 43            | $ 12               
2016-2020 | $ 235           | $ 59                n .shareholders 2019 equity in july 2007 , the company 2019s board of directors authorized the repurchase for retirement of up to 50 million shares of the company 2019s common stock in open-market transactions or otherwise .at december 31 , 2010 , the company had remaining authorization to repurchase up to 27 million shares .during 2010 , the company repurchased and retired three million shares of company common stock , for cash aggregating $ 45 million to offset the dilutive impact of the 2010 grant of three million shares of long-term stock awards .the company repurchased and retired two million common shares in 2009 and nine million common shares in 2008 for cash aggregating $ 11 million and $ 160 million in 2009 and 2008 , respectively .on the basis of amounts paid ( declared ) , cash dividends per common share were $ .30 ( $ .30 ) in 2010 , $ .46 ( $ .30 ) in 2009 and $ .925 ( $ .93 ) in 2008 , respectively .in 2009 , the company decreased its quarterly cash dividend to $ .075 per common share from $ .235 per common share .masco corporation notes to consolidated financial statements 2014 ( continued ) .
Question: what portion of the authorized repurchase of shares for retirement remains to be purchased as of december 31, 2010?

Read the following texts and table with financial data from an S&P 500 earnings report carefully.Based on the question-answer history (if provided), answer the last question. The answer may require mathematical calculation based on the data provided.
m .employee retirement plans 2013 ( continued ) of equities and fixed-income investments , and would be less liquid than financial instruments that trade on public markets .potential events or circumstances that could have a negative effect on estimated fair value include the risks of inadequate diversification and other operating risks .to mitigate these risks , investments are diversified across and within asset classes in support of investment objectives .policies and practices to address operating risks include ongoing manager oversight , plan and asset class investment guidelines and instructions that are communicated to managers , and periodic compliance and audit reviews to ensure adherence to these policies .in addition , the company periodically seeks the input of its independent advisor to ensure the investment policy is appropriate .the company sponsors certain post-retirement benefit plans that provide medical , dental and life insurance coverage for eligible retirees and dependents in the united states based upon age and length of service .the aggregate present value of the unfunded accumulated post-retirement benefit obligation was $ 13 million at both december 31 , 2010 and 2009 .cash flows at december 31 , 2010 , the company expected to contribute approximately $ 30 million to $ 35 million to its qualified defined-benefit pension plans to meet erisa requirements in 2011 .the company also expected to pay benefits of $ 3 million and $ 10 million to participants of its unfunded foreign and non-qualified ( domestic ) defined-benefit pension plans , respectively , in 2011 .at december 31 , 2010 , the benefits expected to be paid in each of the next five years , and in aggregate for the five years thereafter , relating to the company 2019s defined-benefit pension plans , were as follows , in millions : qualified non-qualified .           | qualified plans | non-qualified plans
2011      | $ 38            | $ 10               
2012      | $ 40            | $ 11               
2013      | $ 41            | $ 11               
2014      | $ 41            | $ 12               
2015      | $ 43            | $ 12               
2016-2020 | $ 235           | $ 59                n .shareholders 2019 equity in july 2007 , the company 2019s board of directors authorized the repurchase for retirement of up to 50 million shares of the company 2019s common stock in open-market transactions or otherwise .at december 31 , 2010 , the company had remaining authorization to repurchase up to 27 million shares .during 2010 , the company repurchased and retired three million shares of company common stock , for cash aggregating $ 45 million to offset the dilutive impact of the 2010 grant of three million shares of long-term stock awards .the company repurchased and retired two million common shares in 2009 and nine million common shares in 2008 for cash aggregating $ 11 million and $ 160 million in 2009 and 2008 , respectively .on the basis of amounts paid ( declared ) , cash dividends per common share were $ .30 ( $ .30 ) in 2010 , $ .46 ( $ .30 ) in 2009 and $ .925 ( $ .93 ) in 2008 , respectively .in 2009 , the company decreased its quarterly cash dividend to $ .075 per common share from $ .235 per common share .masco corporation notes to consolidated financial statements 2014 ( continued ) .
Question: what portion of the authorized repurchase of shares for retirement remains to be purchased as of december 31, 2010?
