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Mexican Fuel Excise Tax Credit	6 Months Ended
Mexican Fuel Excise Tax Credit	Jun. 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. In the second quarter of 2016, the Company determined it was eligible for and could utilize a credit for the excise tax included in the price of fuel that is purchased and consumed in locomotives and certain work equipment in Mexico and recognized a $34.0 million year-to-date benefit. The Company recognized a $12.8 million and $24.5 million benefit for the three and six months ended June 30, 2017, respectively. 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.