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.


a summary of the company 2019s significant contractual obligations as of december 31 , 2015 , follows : contractual obligations . <table class='wikitable'><tr><td>1</td><td>( millions )</td><td>total</td><td>payments due by year 2016</td><td>payments due by year 2017</td><td>payments due by year 2018</td><td>payments due by year 2019</td><td>payments due by year 2020</td><td>payments due by year after 2020</td></tr><tr><td>2</td><td>long-term debt including current portion ( note 10 )</td><td>$ 9878</td><td>$ 1125</td><td>$ 744</td><td>$ 993</td><td>$ 622</td><td>$ 1203</td><td>$ 5191</td></tr><tr><td>3</td><td>interest on long-term debt</td><td>2244</td><td>174</td><td>157</td><td>153</td><td>149</td><td>146</td><td>1465</td></tr><tr><td>4</td><td>operating leases ( note 14 )</td><td>943</td><td>234</td><td>191</td><td>134</td><td>86</td><td>72</td><td>226</td></tr><tr><td>5</td><td>capital leases ( note 14 )</td><td>59</td><td>11</td><td>6</td><td>4</td><td>3</td><td>3</td><td>32</td></tr><tr><td>6</td><td>unconditional purchase obligations and other</td><td>1631</td><td>1228</td><td>160</td><td>102</td><td>54</td><td>56</td><td>31</td></tr><tr><td>7</td><td>total contractual cash obligations</td><td>$ 14755</td><td>$ 2772</td><td>$ 1258</td><td>$ 1386</td><td>$ 914</td><td>$ 1480</td><td>$ 6945</td></tr></table> long-term debt payments due in 2016 and 2017 include floating rate notes totaling $ 126 million ( classified as current portion of long-term debt ) , and $ 96 million ( included as a separate floating rate note in the long-term debt table ) , respectively , as a result of put provisions associated with these debt instruments . interest projections on both floating and fixed rate long-term debt , including the effects of interest rate swaps , are based on effective interest rates as of december 31 , 2015 . unconditional purchase obligations are defined as an agreement to purchase goods or services that is enforceable and legally binding on the company . included in the unconditional purchase obligations category above are certain obligations related to take or pay contracts , capital commitments , service agreements and utilities . these estimates include both unconditional purchase obligations with terms in excess of one year and normal ongoing purchase obligations with terms of less than one year . many of these commitments relate to take or pay contracts , in which 3m guarantees payment to ensure availability of products or services that are sold to customers . the company expects to receive consideration ( products or services ) for these unconditional purchase obligations . contractual capital commitments are included in the preceding table , but these commitments represent a small part of the company 2019s expected capital spending in 2016 and beyond . the purchase obligation amounts do not represent the entire anticipated purchases in the future , but represent only those items for which the company is contractually obligated . the majority of 3m 2019s products and services are purchased as needed , with no unconditional commitment . for this reason , these amounts will not provide a reliable indicator of the company 2019s expected future cash outflows on a stand-alone basis . other obligations , included in the preceding table within the caption entitled 201cunconditional purchase obligations and other , 201d include the current portion of the liability for uncertain tax positions under asc 740 , which is expected to be paid out in cash in the next 12 months . the company is not able to reasonably estimate the timing of the long-term payments or the amount by which the liability will increase or decrease over time ; therefore , the long-term portion of the net tax liability of $ 208 million is excluded from the preceding table . refer to note 8 for further details . as discussed in note 11 , the company does not have a required minimum cash pension contribution obligation for its u.s . plans in 2016 and company contributions to its u.s . and international pension plans are expected to be largely discretionary in future years ; therefore , amounts related to these plans are not included in the preceding table . financial instruments the company enters into foreign exchange forward contracts , options and swaps to hedge against the effect of exchange rate fluctuations on cash flows denominated in foreign currencies and certain intercompany financing transactions . the company manages interest rate risks using a mix of fixed and floating rate debt . to help manage borrowing costs , the company may enter into interest rate swaps . under these arrangements , the company agrees to exchange , at specified intervals , the difference between fixed and floating interest amounts calculated by reference to an agreed-upon notional principal amount . the company manages commodity price risks through negotiated supply contracts , price protection agreements and forward contracts. .
Question: as of december 31, 2015, what percentage did the total interest on long-term debt represent in relation to the total contractual cash obligations?

0.15208