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.

Text: 6 . debt the following is a summary of outstanding debt ( in millions ) : . <table class='wikitable'><tr><td>1</td><td>as of december 31</td><td>2015</td><td>2014</td></tr><tr><td>2</td><td>5.00% ( 5.00 % ) senior notes due september 2020</td><td>599</td><td>599</td></tr><tr><td>3</td><td>4.75% ( 4.75 % ) senior notes due 2045</td><td>598</td><td>2014</td></tr><tr><td>4</td><td>3.50% ( 3.50 % ) senior notes due june 2024</td><td>597</td><td>597</td></tr><tr><td>5</td><td>4.60% ( 4.60 % ) senior notes due june 2044</td><td>549</td><td>549</td></tr><tr><td>6</td><td>2.875% ( 2.875 % ) senior notes due may 2026 ( eur 500m )</td><td>545</td><td>605</td></tr><tr><td>7</td><td>8.205% ( 8.205 % ) junior subordinated notes due january 2027</td><td>521</td><td>521</td></tr><tr><td>8</td><td>3.125% ( 3.125 % ) senior notes due may 2016</td><td>500</td><td>500</td></tr><tr><td>9</td><td>2.80% ( 2.80 % ) senior notes due 2021</td><td>399</td><td>2014</td></tr><tr><td>10</td><td>4.00% ( 4.00 % ) senior notes due november 2023</td><td>349</td><td>349</td></tr><tr><td>11</td><td>6.25% ( 6.25 % ) senior notes due september 2040</td><td>298</td><td>298</td></tr><tr><td>12</td><td>4.76% ( 4.76 % ) senior notes due march 2018 ( cad 375m )</td><td>271</td><td>322</td></tr><tr><td>13</td><td>4.45% ( 4.45 % ) senior notes due may 2043</td><td>249</td><td>248</td></tr><tr><td>14</td><td>4.25% ( 4.25 % ) senior notes due december 2042</td><td>196</td><td>196</td></tr><tr><td>15</td><td>3.50% ( 3.50 % ) senior notes due september 2015</td><td>2014</td><td>599</td></tr><tr><td>16</td><td>commercial paper</td><td>50</td><td>168</td></tr><tr><td>17</td><td>other</td><td>16</td><td>31</td></tr><tr><td>18</td><td>total debt</td><td>5737</td><td>5582</td></tr><tr><td>19</td><td>less short-term and current portion of long-term debt</td><td>562</td><td>783</td></tr><tr><td>20</td><td>total long-term debt</td><td>$ 5175</td><td>$ 4799</td></tr></table> revolving credit facilities as of december 31 , 2015 , aon plc had two committed credit facilities outstanding : its $ 400 million u.s . credit facility expiring in march 2017 ( the "2017 facility" ) and $ 900 million multi-currency u.s . credit facility expiring in february 2020 ( the "2020 facility" ) . the 2020 facility was entered into on february 2 , 2015 and replaced the previous 20ac650 million european credit facility . effective february 2 , 2016 , the 2020 facility terms were extended for 1 year and will expire in february 2021 . each of these facilities included customary representations , warranties and covenants , including financial covenants that require aon plc to maintain specified ratios of adjusted consolidated ebitda to consolidated interest expense and consolidated debt to adjusted consolidated ebitda , in each case , tested quarterly . at december 31 , 2015 , aon plc did not have borrowings under either the 2017 facility or the 2020 facility , and was in compliance with these financial covenants and all other covenants contained therein during the twelve months ended december 31 , 2015 . on november 13 , 2015 , aon plc issued $ 400 million of 2.80% ( 2.80 % ) senior notes due march 2021 . we used the proceeds of the issuance for general corporate purposes . on september 30 , 2015 , $ 600 million of 3.50% ( 3.50 % ) senior notes issued by aon corporation matured and were repaid . on may 20 , 2015 , the aon plc issued $ 600 million of 4.750% ( 4.750 % ) senior notes due may 2045 . the company used the proceeds of the issuance for general corporate purposes . on august 12 , 2014 , aon plc issued $ 350 million of 3.50% ( 3.50 % ) senior notes due june 2024 . the 3.50% ( 3.50 % ) notes due 2024 constitute a further issuance of , and were consolidated to form a single series of debt securities with , the $ 250 million of 3.50% ( 3.50 % ) notes due june 2024 that was issued by aon plc on may 20 , 2014 concurrently with aon plc's issuance of $ 550 million of 4.60% ( 4.60 % ) notes due june 2044 . aon plc used the proceeds from these issuances for working capital and general corporate purposes. .
Question: what was the change in total debt during 2015?

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