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Mexican Fuel Excise Tax Credit	9 Months Ended
Mexican Fuel Excise Tax Credit	Sep. 30, 2017
Mexican Fuel Excise Tax Credit [Abstract]
Mexican Fuel Excise Tax Credit	Mexican Fuel Excise Tax Credit Fuel purchases made in Mexico are subject to an excise tax that is included in the price of fuel. The Company is eligible for and utilizes an available credit for the excise tax included in the price of fuel that is purchased and consumed in locomotives and certain work equipment in Mexico. For the three and nine months ended September 30, 2017, the Company recognized an $11.1 million and $35.6 million benefit, respectively, and a $15.6 million and $49.6 million benefit for the same periods in 2016. The Mexican fuel excise tax credit is realized through the offset of the total annual Mexico income tax liability and income tax withholding payment obligations of Kansas City Southern de Mexico, S.A. de C.V. (“KCSM”), with no carryforward to future periods.