{"pre_text": ["at december 31 , 2015 and 2014 , options for 5 million and 6 million shares of common stock were exercisable at a weighted-average price of $ 55.42 and $ 56.21 , respectively .", "the total intrinsic value of options exercised was approximately $ .1 billion during 2016 , 2015 and 2014 .", "cash received from option exercises under all incentive plans for 2016 , 2015 and 2014 was approximately $ .1 billion , $ .1 billion and $ .2 billion , respectively .", "the tax benefit realized from option exercises under all incentive plans was insignificant for 2016 , 2015 and 2014 .", "shares of common stock available during the next year for the granting of options and other awards under the incentive plans were approximately 39 million shares at december 31 , 2016 .", "total shares of pnc common stock authorized for future issuance under all equity compensation plans totaled approximately 40 million shares at december 31 , 2016 .", "during 2016 , we issued approximately 2 million common shares from treasury stock in connection with stock option exercise activity .", "as with past exercise activity , we currently intend to utilize primarily treasury stock for any future stock option exercises .", "incentive/performance unit awards and restricted share/restricted share unit awards the fair value of nonvested incentive/performance unit awards and restricted share/restricted share unit awards is initially determined based on prices not less than the market value of our common stock on the date of grant with a reduction for estimated forfeitures .", "the value of certain incentive/ performance unit awards is subsequently remeasured based on the achievement of one or more financial and other performance goals .", "additionally , certain incentive/ performance unit awards require subsequent adjustment to their current market value due to certain discretionary risk review triggers .", "the weighted-average grant date fair value of incentive/ performance unit awards and restricted share/restricted share unit awards granted in 2016 , 2015 and 2014 was $ 78.37 , $ 91.57 and $ 80.79 per share , respectively .", "the total intrinsic value of incentive/performance unit and restricted share/ restricted share unit awards vested during 2016 , 2015 and 2014 was approximately $ .1 billion , $ .2 billion and $ .1 billion , respectively .", "we recognize compensation expense for such awards ratably over the corresponding vesting and/or performance periods for each type of program .", "table 78 : nonvested incentive/performance unit awards and restricted share/restricted share unit awards 2013 rollforward ( a ) shares in millions nonvested incentive/ performance units shares weighted- average date fair nonvested restricted share/ restricted weighted- average grant date fair value ."], "post_text": ["( a ) forfeited awards during 2016 were insignificant .", "( b ) includes adjustments for achieving specific performance goals for incentive/ performance unit share awards granted in prior periods .", "in table 78 , the units and related weighted-average grant date fair value of the incentive/performance unit share awards exclude the effect of dividends on the underlying shares , as those dividends will be paid in cash if and when the underlying shares are issued to the participants .", "blackrock long-term incentive plans ( ltip ) blackrock adopted the 2002 ltip program to help attract and retain qualified professionals .", "at that time , we agreed to transfer up to four million shares of blackrock common stock to fund a portion of the 2002 ltip program and future ltip programs approved by blackrock 2019s board of directors .", "in 2009 , our obligation to deliver any remaining blackrock common shares was replaced with an obligation to deliver shares of blackrock 2019s series c preferred stock held by us .", "in 2016 , we transferred .5 million shares of blackrock series c preferred stock to blackrock in connection with our obligation .", "at december 31 , 2016 , we held approximately .8 million shares of blackrock series c preferred stock which were available to fund our obligations .", "see note 23 subsequent events for information on our february 1 , 2017 transfer of .5 million shares of the series c preferred stock to blackrock to satisfy a portion of our ltip obligation .", "we account for our blackrock series c preferred stock at fair value , which offsets the impact of marking-to-market the obligation to deliver these shares to blackrock .", "see note 6 fair value for additional information regarding the valuation of the blackrock series c preferred stock .", "the pnc financial services group , inc .", "2013 form 10-k 139 ."], "table": [["shares in millions december 31 2015", "nonvested incentive/ performance units shares 2", "weighted- average grant date fair value $ 79.27", "nonvested restricted share/ restricted share units 3", "weighted- average grant date fair value $ 79.26"], ["granted ( b )", "1", "$ 77.77", "1", "$ 78.71"], ["vested/released ( b )", "-1 ( 1 )", "$ 71.59", "-1 ( 1 )", "$ 65.53"], ["december 31 2016", "2", "$ 81.42", "3", "$ 83.27"]], "table_ori": [["Shares in millions", "Nonvested Incentive/ Performance Units Shares", "Weighted- Average Grant Date Fair Value", "Nonvested Restricted Share/ Restricted Share Units", "Weighted- Average Grant Date Fair Value"], ["December 31, 2015", "2", "$79.27", "3", "$79.26"], ["Granted (b)", "1", "$77.77", "1", "$78.71"], ["Vested/Released (b)", "(1)", "$71.59", "(1)", "$65.53"], ["December 31, 2016", "2", "$81.42", "3", "$83.27"]]}

Question: what was the total intrinsic value of incentive/performance unit and restricted share/ restricted share unit awards vested during 2016 , 2015 and 2014 in billions?
Evidence:
text_3: the tax benefit realized from option exercises under all incentive plans was insignificant for 2016 , 2015 and 2014 .
text_12: the total intrinsic value of incentive/performance unit and restricted share/ restricted share unit awards vested during 2016 , 2015 and 2014 was approximately $ .1 billion , $ .2 billion and $ .1 billion , respectively .
Program: add(.1, .2), add(#0, .1)
Answer:
str_answer: .4
exe_answer: 0.4