long-term borrowings at december 31 , 2016 had a carrying value of $ 4.9 billion and a fair value of $ 5.2 billion determined using market prices at the end of december 2027 notes . in march 2017 , the company issued $ 700 million in aggregate principal amount of 3.20% ( 3.20 % ) senior unsecured and unsubordinated notes maturing on march 15 , 2027 ( the 201c2027 notes 201d )