Basis of Presentation	6 Months Ended
Jun. 30, 2018
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation In the opinion of the management of KCS, the accompanying unaudited consolidated financial statements contain all adjustments (consisting of normal and recurring adjustments) necessary to reflect a fair statement of the results for interim periods in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). Pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”), certain information and note disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted. These consolidated financial statements should be read in conjunction with the consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017. The results of operations for the three and six months ended June 30, 2018, are not necessarily indicative of the results to be expected for the full year ending December 31, 2018. Certain prior year amounts have been reclassified to conform to the current year presentation. During the first quarter of 2018, the Company adopted Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers, which is also known as Accounting Standard Codification ("ASC") Topic 606, for all contracts, using the modified retrospective method. Results from reporting periods beginning after January 1, 2018, are presented under ASC Topic 606, while prior period amounts are not adjusted and continue to be reported in accordance with the Company's historical accounting under ASC Topic 605, Revenue Recognition. The adoption of this guidance did not have a significant impact on the Company's consolidated financial statements; thus no adjustment was made to the opening balance of equity at January 1, 2018. See Note 3 - Revenue for additional information. During the first quarter of 2018, the Company adopted ASU No. 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, which allows for a reclassification from accumulated other comprehensive loss to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. The Company applied the guidance as of the beginning of the period of adoption and reclassified $0.7 million, due to the change in federal corporate tax rate, from accumulated other comprehensive loss to retained earnings. It is the Company’s policy to release income tax effects from accumulated other comprehensive loss using the portfolio approach.

Basis of Presentation

In the opinion of the management of KCS, the accompanying unaudited consolidated financial statements contain all adjustments (consisting of normal and recurring adjustments) necessary to reflect a fair statement of the results for interim periods in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). Pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”), certain information and note disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted. These consolidated financial statements should be read in conjunction with the consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017. The results of operations for the three and six months ended June 30, 2018, are not necessarily indicative of the results to be expected for the full year ending December 31, 2018. Certain prior year amounts have been reclassified to conform to the current year presentation.

During the first quarter of 2018, the Company adopted Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers, which is also known as Accounting Standard Codification ("ASC") Topic 606, for all contracts, using the modified retrospective method. Results from reporting periods beginning after January 1, 2018, are presented under ASC Topic 606, while prior period amounts are not adjusted and continue to be reported in accordance with the Company's historical accounting under ASC Topic 605, Revenue Recognition. The adoption of this guidance did not have a significant impact on the Company's consolidated financial statements; thus no adjustment was made to the opening balance of equity at January 1, 2018. See Note 3 - Revenue for additional information.

During the first quarter of 2018, the Company adopted ASU No. 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, which allows for a reclassification from accumulated other comprehensive loss to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. The Company applied the guidance as of the beginning of the period of adoption and reclassified $0.7 million, due to the change in federal corporate tax rate, from accumulated other comprehensive loss to retained earnings. It is the Company’s policy to release income tax effects from accumulated other comprehensive loss using the portfolio approach.