Kansas City Southern (KSU) 10-K 26 Jan 18 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information Document - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Jan. 19, 2018	Jun. 30, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	KANSAS CITY SOUTHERN
Entity Central Index Key	54,480
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		103,053,604
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 10,750

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues	$ 2,582.9	$ 2,334.2	$ 2,418.8
Operating expenses:
Compensation and benefits	493.8	462.4	442.2
Purchased services	193.7	208.5	223
Fuel	316.1	253.8	306.9
Mexican fuel excise tax credit	(44.1)	(62.8)	0
Equipment costs	129.2	120	119.4
Depreciation and amortization	320.9	305	284.6
Materials and other	251.7	228.8	229.3
Lease termination costs	0	0	9.6
Total operating expenses	1,661.3	1,515.7	1,615
Operating income	921.6	818.5	803.8
Equity in net earnings of affiliates	11.5	14.6	18.3
Interest expense	(100.2)	(97.7)	(81.9)
Debt retirement and exchange costs	0	0	(7.6)
Foreign exchange gain (loss)	41.7	(72)	(56.6)
Other expense, net	(0.3)	(0.7)	(3.4)
Income before income taxes	874.3	662.7	672.6
Income tax expense (benefit)	(89.6)	182.8	187.3
Net income	963.9	479.9	485.3
Less: Net income attributable to noncontrolling interest	1.9	1.8	1.8
Net income attributable to Kansas City Southern and subsidiaries	962	478.1	483.5
Preferred stock dividends	0.2	0.2	0.2
Net income available to common stockholders	$ 961.8	$ 477.9	$ 483.3
Earnings per share:
Basic earnings per share	$ 9.18	$ 4.44	$ 4.41
Diluted earnings per share	$ 9.16	$ 4.43	$ 4.40
Average shares outstanding (in thousands):
Basic	104,728	107,560	109,709
Potentially dilutive common shares	312	201	206
Diluted	105,040	107,761	109,915

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net income	$ 963.9	$ 479.9	$ 485.3
Other comprehensive loss:
Unrealized loss on interest rate derivative instruments during the period, net of tax of $(2.2) million	(3.4)	0	0
Amortization of prior service credit, net of tax of less than $(0.1) million	0	0	(0.1)
Foreign currency translation adjustments, net of tax of $3.8 million, $(1.0) million and $(0.8) million	(3.3)	(1.5)	(1.4)
Other comprehensive loss	(6.7)	(1.5)	(1.5)
Comprehensive income	957.2	478.4	483.8
Less: comprehensive income attributable to noncontrolling interest	1.9	1.8	1.8
Comprehensive income attributable to Kansas City Southern and subsidiaries	$ 955.3	$ 476.6	$ 482

Consolidated Statements of Com4

Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Tax effect on unrealized loss on interest rate derivative instruments during the period	$ (2.2)	$ 0	$ 0
Tax effect on amortization of prior service credit	0	0	0
Tax effect on foreign currency translation adjustments	$ 3.8	$ (1)	$ (0.8)

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 134.1	$ 170.6
Accounts receivable, net	237.8	191
Materials and supplies	150.8	152.6
Other current assets	157.4	133.8
Total current assets	680.1	648
Investments	44.6	32.9
Property and equipment (including concession assets), net	8,403.8	8,069.7
Other assets	70.2	66.9
Total assets	9,198.7	8,817.5
Current liabilities:
Long-term debt due within one year	38.8	25.4
Short-term borrowings	345.1	181.3
Accounts payable and accrued liabilities	587.8	537.7
Total current liabilities	971.7	744.4
Long-term debt	2,235.5	2,271.5
Deferred income taxes	987.2	1,289.3
Other noncurrent liabilities and deferred credits	138.9	107.8
Total liabilities	4,333.3	4,413
Stockholders’ equity:
$.01 par, common stock, 400,000,000 shares authorized, 123,352,185 shares issued; 103,036,805 and 106,606,619 shares outstanding at December 31, 2017 and 2016, respectively	1	1.1
Additional paid-in capital	943.3	954.8
Retained earnings	3,611.4	3,134.1
Accumulated other comprehensive loss	(12.9)	(6.2)
Total stockholders’ equity	4,548.9	4,089.9
Noncontrolling interest	316.5	314.6
Total equity	4,865.4	4,404.5
Total liabilities and equity	9,198.7	8,817.5
$25 Par Preferred Stock [Member]
Stockholders’ equity:
$25 par, 4% noncumulative, preferred stock, 840,000 shares authorized, 649,736 shares issued, 242,170 shares outstanding	$ 6.1	$ 6.1

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Stockholders’ equity:
Common Stock, Par Value	$ 0.01	$ 0.01
Common Stock, Shares Authorized	400,000,000	400,000,000
Common Stock, Shares Issued	123,352,185	123,352,185
Common Stock, Shares Outstanding	103,036,805	106,606,619
$25 Par Preferred Stock [Member]
Stockholders’ equity:
Preferred Stock, Par Value	$ 25	$ 25	$ 25
Preferred Stock, Dividend Rate	4.00%	4.00%
Preferred Stock, Shares Authorized	840,000	840,000
Preferred Stock, Shares Issued	649,736	649,736
Preferred Stock, Shares Outstanding	242,170	242,170

Consolidated Statements of Cash

Consolidated Statements of Cash Flows $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Operating activities:
Net income	$ 963.9	$ 479.9	$ 485.3
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	320.9	305	284.6
Deferred income taxes	(301.3)	104.8	135.8
Equity in net earnings of affiliates	(11.5)	(14.6)	(18.3)
Share-based compensation	18.2	19.2	11.4
Distributions from unconsolidated affiliates	12.5	13	16.5
Debt retirement and exchange costs	0	0	7.6
Settlement of foreign currency derivative instruments	(10.8)	(58.4)	(5.5)
(Gain) loss on foreign currency derivative instruments	(38.2)	53.5	47.2
Mexican fuel excise tax credit	(44.1)	(62.8)	0
Deemed mandatory repatriation tax	41.3	0	0
Changes in working capital items:
Accounts receivable	(46.7)	(18.3)	12
Materials and supplies	1.4	(14.2)	(26.2)
Other current assets	(24.5)	9.9	(10.1)
Accounts payable and accrued liabilities	160.4	101.8	(27.1)
Other, net	(13.1)	0.2	(4)
Net cash provided by operating activities	1,028.4	919	909.2
Investing activities:
Capital expenditures	(585.4)	(563.6)	(688)
Purchase or replacement of equipment under operating leases	(42.6)	(26.6)	(144.2)
Property investments in MSLLC	(26)	(33.1)	(17.4)
Investments in and advances to affiliates	(20.4)	(0.9)	(0.7)
Proceeds from disposal of property	8.8	5	4.6
Other, net	(15.5)	(9)	(27.3)
Net cash provided (used)	(681.1)	(628.2)	(873)
Financing activities:
Proceeds from short-term borrowings	12,102.6	8,698.7	10,866.2
Repayment of short-term borrowings	(11,943.6)	(8,597.9)	(11,237.3)
Proceeds from issuance of long-term debt	0	248.7	623.7
Repayment of long-term debt	(25.4)	(276.4)	(149.8)
Dividends paid	(142.5)	(142.8)	(140.1)
Shares repurchased	(375.6)	(185.4)	(194.2)
Debt costs	0	(2.6)	(20.3)
Proceeds from employee stock plans	0.7	0.9	4.2
Net cash used for financing activities	(383.8)	(256.8)	(247.6)
Cash and cash equivalents:
Net increase (decrease) during each year	(36.5)	34	(211.4)
At beginning of year	170.6	136.6	348
At end of year	134.1	170.6	136.6
Non-cash investing and financing activities:
Capital expenditures and purchase or replacement of equipment under operating lease accrued but not yet paid at end of year	34.9	60.8	40.4
Other investing activities accrued but not yet paid at the end of the year	56.7	38.3	22.3
Capital lease obligations incurred	0.1	2.4	4.7
Non-cash asset acquisitions	0.1	4.8	7.6
Dividends accrued but not yet paid at end of year	37.2	35.2	35.9
Cash payments:
Interest paid, net of amounts capitalized	97.9	84.3	81.1
Income tax payments, net of refunds	$ 51.1	$ 40.5	$ 40.3

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Total	$25 Par Preferred Stock [Member]	$25 Par Preferred Stock [Member]	$.01 Par Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member]$25 Par Preferred Stock [Member]	Accumulated Other Comprehensive Loss [Member]	Non-controlling Interest [Member]
Balance at Dec. 31, 2014	$ 4,064.1		$ 6.1	$ 1.1	$ 949.8	$ 2,801.7		$ (3.2)	$ 308.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	485.3					483.5			1.8
Other comprehensive loss	(1.5)							(1.5)
Dividends on common stock	(144.8)					(144.8)
Dividends on preferred stock		$ (0.2)					$ (0.2)
Share repurchases	(194.2)				(18.7)	(175.5)
Options exercised and stock subscribed, net of shares withheld for employee taxes	4.7				4.7
Excess tax benefit from share-based compensation	(0.1)				(0.1)
Share-based compensation	11.4				11.4
Balance at Dec. 31, 2015	4,224.7		6.1	1.1	947.1	2,964.7		(4.7)	310.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	479.9					478.1			1.8
Other comprehensive loss	(1.5)							(1.5)
Contributions from noncontrolling interest	2.4								2.4
Dividends on common stock	(141.9)					(141.9)
Dividends on preferred stock		(0.2)					(0.2)
Share repurchases	(185.4)				(18.8)	(166.6)
Options exercised and stock subscribed, net of shares withheld for employee taxes	1.6				1.6
Excess tax benefit from share-based compensation	5.7				5.7
Share-based compensation	19.2				19.2
Balance at Dec. 31, 2016	4,404.5		6.1	1.1	954.8	3,134.1		(6.2)	314.6
Cumulative-effect adjustment due to adoption of ASU 2016-09, Improvements to Employee Share-Based Payment Accounting at Dec. 31, 2016	2.5				1.3	1.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	963.9					962			1.9
Other comprehensive loss	(6.7)							(6.7)
Dividends on common stock	(144.2)					(144.2)
Dividends on preferred stock		$ (0.2)					$ (0.2)
Share repurchases	(375.6)			(0.1)	(34)	(341.5)
Options exercised and stock subscribed, net of shares withheld for employee taxes	3				3
Share-based compensation	18.2				18.2
Balance at Dec. 31, 2017	$ 4,865.4		$ 6.1	$ 1	$ 943.3	$ 3,611.4		$ (12.9)	$ 316.5

Consolidated Statement of Chang

Consolidated Statement of Changes in Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Common Stock, Dividends Per Share	$ 1.38	$ 1.32	$ 1.32
$25 Par Preferred Stock [Member]
Preferred Stock, Par Value	25	25	25
Preferred Stock, Dividends Per Share	$ 1	$ 1	$ 1

Description of the Business

Description of the Business	12 Months Ended
	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of the Business	Description of the Business Kansas City Southern (“KCS” or the “Company”), a Delaware corporation, is a holding company with principal operations in rail transportation. The Company is engaged in the freight rail transportation business operating through a single coordinated rail network under one reportable business segment. The Company generates revenues and cash flows by providing its customers with freight delivery services both within its regions, and throughout North America through connections with other Class I rail carriers. KCS’s customers conduct business in a number of different industries, including electric-generating utilities, chemical and petroleum products, paper and forest products, agriculture and mineral products, automotive products and intermodal transportation. The primary subsidiaries of the Company consist of the following: • The Kansas City Southern Railway Company (“KCSR”), a wholly-owned consolidated subsidiary. KCSR is a U.S. Class I railroad that services the midwest and southeast regions of the United States; • Kansas City Southern de México, S.A. de C.V. (“KCSM”), a wholly-owned consolidated subsidiary which operates under the rights granted by the Concession acquired from the Mexican government in 1997 (the “Concession”) as described below; • Mexrail, Inc. (“Mexrail”), a wholly-owned consolidated subsidiary; which wholly owns The Texas Mexican Railway Company (“Tex-Mex”); • KCSM Servicios, S.A. de C.V. (“KCSM Servicios”), a wholly-owned consolidated subsidiary which provides employee services to KCSM; and • Meridian Speedway, LLC (“MSLLC”), a seventy percent -owned consolidated affiliate. MSLLC owns the former KCSR rail line between Meridian, Mississippi and Shreveport, Louisiana, which is the portion of the rail line between Dallas, Texas and Meridian known as the “Meridian Speedway”. Including equity investments in: • Panama Canal Railway Company (“PCRC”), a fifty percent -owned unconsolidated affiliate which provides ocean to ocean freight and passenger services along the Panama Canal; • TFCM, S. de R.L. de C.V. (“TCM”), a forty-five percent-owned unconsolidated affiliate that operates a bulk liquid terminal in San Luis Potosí, Mexico; • Ferrocarril y Terminal del Valle de México, S.A. de C.V. (“FTVM”), a twenty-five percent -owned unconsolidated affiliate that provides railroad services as well as ancillary services in the greater Mexico City area; and • PTC-220, LLC (“PTC-220”), a fourteen percent -owned unconsolidated affiliate that holds the licenses to large blocks of radio spectrum and other assets for the deployment of positive train control. The KCSM Concession. KCSM holds a concession from the Mexican government until June 2047 (exclusive service through 2027, subject to certain trackage and haulage rights granted to other concessionaires), which is renewable under certain conditions for an additional period of up to 50 years (the “Concession”). The Concession is to provide freight transportation services over north-east rail lines which are a primary commercial corridor of the Mexican railroad system. KCSM has the right to use, but does not own, all track and buildings that are necessary for the rail lines’ operation. KCSM is required to pay the Mexican government an annual concession duty equal to 1.25% of gross revenues during the Concession period. Employees and Labor Relations. KCSR participates in industry-wide multi-employer bargaining as a member of the National Carriers’ Conference Committee, as well as local bargaining for agreements that are limited to KCSR's property. Approximately 75% of KCSR employees are covered by collective bargaining agreements. KCSM Servicios union employees are covered by one labor agreement, which was signed on April 16, 2012, between KCSM Servicios and the Sindicato de Trabajadores Ferrocarrileros de la República Mexicana (“Mexican Railroad Union”), for an indefinite period of time, for the purpose of regulating the relationship between the parties. Approximately 80% of KCSM Servicios employees are covered by this labor agreement. Union labor negotiations have not historically resulted in any strike, boycott, or other disruption in the Company’s business operations.

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Significant Accounting Policies	Significant Accounting Policies Principles of Consolidation. The accompanying consolidated financial statements are presented using the accrual basis of accounting and include the Company and its majority-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated. Certain prior year amounts have been reclassified to conform to the current year presentation. The equity method of accounting is used for all entities in which the Company or its subsidiaries have significant influence, but not a controlling interest. The Company evaluates less-than-majority-owned investments for consolidation pursuant to consolidation and variable interest entity guidance. The Company does not have any less-than-majority-owned investments requiring consolidation. During the first quarter of 2017, the Company adopted Accounting Standards Update (“ASU”) No. 2016-09, Improvements to Employee Share-Based Payment Accounting . The Company now recognizes forfeitures as they occur rather than estimating a forfeiture rate for the year. Excess tax benefits or deficiencies resulting from the exercise or vesting of awards are included in income tax expense in the reporting period in which they occur. Upon adoption, the Company recognized a cumulative-effect adjustment to equity at the beginning of 2017. During the third quarter of 2017, the Company early adopted ASU No. 2017-12, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities. The Company now asserts qualitatively, on a quarterly basis, that the hedging relationship was and continues to be highly effective as long as facts and circumstances related to the hedging relationship have not changed. If facts and circumstances have changed, the Company will perform a quantitative assessment to ensure the hedging relationship is still deemed highly effective. In addition, the ineffective portion of an effective hedge is no longer measured periodically and included in the income statement; rather, the total periodic change in fair value of an effective hedge is included in accumulated other comprehensive income on the balance sheet, until settlement occurs. The adoption of the new guidance had no impact on the Company’s consolidated financial statements as there was no ineffectiveness recognized on the Company’s cash flow hedges prior to adoption. Use of Estimates. The accounting and financial reporting policies of the Company conform to accounting principles generally accepted in the United States of America (“U.S. GAAP”). The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Significant items subject to such estimates and assumptions include those related to the recoverability and useful lives of assets, litigation provisions, and income taxes. Changes in facts and circumstances may result in revised estimates and actual results could differ from those estimates. Revenue Recognition. Freight revenue is recognized proportionally as a shipment moves from origin to destination, with the related expense recognized as incurred. Other revenues, in general, are recognized when the product is shipped, as services are performed or contractual obligations are fulfilled. Foreign Exchange Gain (Loss). For financial reporting purposes, foreign subsidiaries maintain records in U.S. dollars, which is the functional currency. The dollar is the currency that reflects the economic substance of the underlying events and circumstances relevant to the entity. Monetary assets and liabilities denominated in pesos are remeasured into dollars using current exchange rates. The difference between the exchange rate on the date of the transaction and the exchange rate on the settlement date, or balance sheet date if not settled, is included in the income statement as foreign exchange gain or loss. Cash Equivalents. Short-term liquid investments with an initial maturity of three months or less are classified as cash and cash equivalents. Accounts Receivable, net. Accounts receivable are net of an allowance for uncollectible accounts as determined by historical experience and adjusted for economic uncertainties or known trends. Accounts are charged to the allowance when a customer enters bankruptcy, when an account has been transferred to a collection agent or submitted for legal action, or when a customer is significantly past due and all available means of collection have been exhausted. At December 31, 2017 and 2016 , the allowance for doubtful accounts was $4.6 million and $5.3 million , respectively. For the years ended December 31, 2017 , 2016 and 2015 , bad debt expense was $1.6 million , $1.2 million and $1.0 million , respectively. Materials and Supplies. Materials and supplies consisting of diesel fuel, items to be used in the maintenance of rolling stock and items to be used in the maintenance or construction of road property are valued at the lower of average cost or net realizable value. Derivative Instruments. Derivatives are measured at fair value and recorded on the balance sheet as either assets or liabilities. Changes in the fair value of derivatives are recorded either through current earnings or as other comprehensive income, depending on hedge designation. Gains and losses on derivative instruments classified as cash flow hedges are reported in other comprehensive income and are reclassified into earnings in the periods in which earnings are impacted by the variability of the cash flow of the hedged item. Property and Equipment (including Concession Assets). KCS capitalizes costs for self-constructed additions and improvements to property including direct labor and material, indirect overhead costs, and interest during long-term construction projects. For purchased assets, all costs necessary to make the asset ready for its intended use are capitalized. Expenditures that significantly increase asset values, productive capacity, efficiency, safety or extend useful lives are capitalized. Repair and maintenance costs are expensed as incurred. Property and equipment are carried at cost and are depreciated primarily on the group method of depreciation, which the Company believes closely approximates a straight line basis over the estimated useful lives of the assets measured in years. The group method of depreciation applies a composite rate to classes of similar assets rather than to individual assets. Composite depreciation rates are based upon the Company’s estimates of the expected average useful lives of assets as well as expected net salvage value at the end of their useful lives. In developing these estimates, the Company utilizes periodic depreciation studies performed by an independent engineering firm. Depreciation rate studies are performed at least every three years for equipment and at least every six years for road property (rail, ties, ballast, etc.). The Company completed depreciation studies for KCSM in 2016 and KCSR in 2015. The impacts of the studies were immaterial to the consolidated financial results for all periods. Under the group method of depreciation, the cost of railroad property and equipment (net of salvage or sales proceeds) retired or replaced in the normal course of business is charged to accumulated depreciation with no gain or loss recognized. Gains or losses on dispositions of land or non-group property and abnormal retirements of railroad property are recognized through income. A retirement of railroad property would be considered abnormal if the cause of the retirement is unusual in nature and its actual life is significantly shorter than what would be expected for that group based on the depreciation studies. An abnormal retirement could cause the Company to re-evaluate the estimated useful life of the impacted asset class. Costs incurred by the Company to acquire the concession rights and related assets, as well as subsequent improvements to the concession assets, are capitalized and amortized using the group method of depreciation over the lesser of the current expected Concession term, including probable renewal of an additional 50-year term, or the estimated useful lives of the assets and rights. Long-lived assets are reviewed for impairment when events or circumstances indicate that the carrying amount of an asset may not be recoverable. If impairment indicators are present and the estimated future undiscounted cash flows are less than the carrying value of the long-lived assets, the carrying value would be reduced to the estimated fair value. Future cash flow estimates for an impairment review would be based on the lowest level of identifiable cash flows, which are the Company’s U.S. and Mexican operations. During the years ended December 31, 2017 and 2016 , management did not identify any indicators of impairment. Goodwill. Goodwill represents the excess of the purchase price over the fair value of the net identifiable assets acquired in business combinations. As of December 31, 2017 and 2016 , the goodwill balance was $13.2 million , which is included in other assets in the consolidated balance sheets. Goodwill is not amortized, but is reviewed at least annually, or more frequently as indicators warrant, for impairment. An impairment loss would be recognized to the extent that the carrying amount exceeds the assets’ fair values. The Company performed its annual impairment review for goodwill as of November 30, 2017 and 2016 , and concluded there was no impairment. Fair Value of Financial Instruments. Non-financial assets and liabilities are recognized at fair value on a nonrecurring basis. These assets and liabilities are measured at fair value on an ongoing basis but are subject to recognition in the financial statements only in certain circumstances. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Company determines the fair values of its financial instruments based on the fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The hierarchy is broken down into three levels based upon the observability of inputs. Fair values determined by Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access. Level 2 inputs include quoted prices for similar assets and liabilities in active markets, and inputs other than quoted prices that are observable for the asset or liability. Level 3 inputs are unobservable inputs for the asset or liability, and include situations where there is little, if any, market activity for the asset or liability. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, the level in the fair value hierarchy within which the fair value measurement in its entirety falls has been determined based on the lowest level input that is significant to the fair value measurement in its entirety. The Company’s assessment of the significance of a particular input to the fair value in its entirety requires judgment and considers factors specific to the asset or liability. Environmental Liabilities. The Company recognizes liabilities for remediation and restoration costs related to past activities when the Company’s obligation is probable and the costs can be reasonably estimated. Costs of future expenditures for environmental remediation are not discounted to their present value. Recoveries of environmental remediation costs from other parties are recorded as assets when their receipt is deemed probable. Costs of ongoing compliance activities related to current operations are expensed as incurred. Personal Injury Claims. Personal injury claims in excess of self-insurance levels are insured up to certain coverage amounts, depending on the type of claim and year of occurrence. The Company’s personal injury liability is based on actuarial studies performed on an undiscounted basis by an independent third party actuarial firm and reviewed by management. The liability is based on claims filed and an estimate of claims incurred but not yet reported. Adjustments to the liability are reflected as operating expenses in the period in which the adjustments are known. Legal fees related to personal injury claims are recognized in operating expense in the period incurred. Health and Welfare and Postemployment Benefits. The Company provides certain medical, life and other postemployment benefits to certain active employees and retirees. The Company uses actuaries to assist management in measuring the benefit obligation and cost based on the current plan provisions, employee demographics, and assumptions about financial and demographic factors affecting the probability, timing and amount of expected future benefit payments. Significant assumptions include the discount rate, rate of increase in compensation levels, and the health care cost trend rate. Actuarial gains and losses determined at the measurement date (December 31) are recognized immediately in the consolidated statements of income. Share-Based Compensation. The Company accounts for all share-based compensation in accordance with fair value recognition provisions. Under this method, compensation expense is measured at grant date fair value and is recognized over the requisite service period in which the award is earned. The Company issues treasury stock to settle share-based awards. Income Taxes. Deferred income tax effects of transactions reported in different periods for financial reporting and income tax return purposes are recognized under the asset and liability method of accounting for income taxes. This method gives consideration to the future tax consequences of the deferred income tax items and immediately recognizes changes in income tax laws in the year of enactment. On December 22, 2017, the President of the United States signed into law the Tax Cuts and Jobs Act (the “Tax Reform Act”). Further information on the tax impacts of the Tax Reform Act is included in Note 12 of the Company’s consolidated financial statements. The Company has recognized a deferred tax asset, net of a valuation allowance, for net operating loss carryovers. The Company projects sufficient future taxable income to realize the deferred tax asset recorded less the valuation allowance. These projections take into consideration assumptions about future income, future capital expenditures and inflation rates. If assumptions or actual conditions change, the deferred tax asset, net of the valuation allowance, will be adjusted to properly reflect the expected tax benefit. Treasury Stock. The excess of repurchase price over par value of common shares held in treasury is allocated between additional paid-in capital and retained earnings. New Accounting Pronouncements In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers , which requires companies to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration it expects to be entitled in exchange for those goods or services. The new standard will become effective for the Company beginning with the first quarter 2018 and the Company plans to adopt the accounting standard using the modified retrospective transition approach. The modified retrospective transition approach will recognize any changes from the beginning of the year of initial application through retained earnings with no restatement of comparative periods. The Company has completed a review of the impacts of the application of the new standard to its existing portfolio of customer contracts. Under the new standard, the Company will continue to recognize freight revenue proportionally as a shipment moves from origin to destination. Furthermore, the Company will be required to assess variable consideration included in its contracts and make judgments and estimates throughout the applicable periods. Certain additional financial statement disclosure requirements are mandated by the new standard including disclosure of contract assets and contract liabilities as well as a disaggregated view of revenue. Based on the Company’s review, the adoption of this guidance will not have a significant impact on the Company’s consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases , which requires lessees to recognize for all leases a right-to-use asset and a lease obligation in the consolidated balance sheet. Expenses are recognized in the consolidated statement of income in a manner similar to current accounting guidance. Lessees are permitted to make an accounting policy election to not recognize an asset and liability for leases with a term of twelve months or less. Lessor accounting under the new standard is substantially unchanged. Additional qualitative and quantitative disclosures, including significant judgments made by management, will be required. The new standard will become effective for the Company beginning with the first quarter 2019 and requires a modified retrospective transition approach. The Company created a cross functional team to assess the contractual arrangements that may qualify as a lease under the new standard and implement a lease management system. At December 31, 2017, KCS disclosed approximately $281.7 million of operating leases in the leases and debt maturities table within Note 11 - Long-Term Debt and will evaluate those contracts as well as other existing arrangements to determine if they qualify for lease accounting under the new standard. The Company is continuing to evaluate the impacts the adoption of this accounting guidance will have on the consolidated financial statements.

Mexican Fuel Excise Tax Credit

Mexican Fuel Excise Tax Credit	12 Months Ended
	Dec. 31, 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 years ended December 31, 2017 and 2016 , the Company recognized a $44.1 million and $62.8 million benefit, 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 KCSM, with no carryforward to future periods.

Hurricane Harvey

Hurricane Harvey	12 Months Ended
	Dec. 31, 2017
Unusual or Infrequent Items, or Both [Abstract]
Hurricane Harvey	Hurricane Harvey In late August 2017, Hurricane Harvey made landfall on the Texas coast and caused flood damage to the Company’s track infrastructure and significantly disrupted the Company’s rail service. The Company filed a claim in the fourth quarter of 2017 under its insurance program for property damage, incremental expenses, and lost profits caused by Hurricane Harvey. In the third quarter of 2017, the Company recognized a receivable for probable insurance recovery offsetting the impact of incremental expenses recognized in the quarter. The recognition of remaining probable insurance recoveries in excess of incremental expenses and self-insured retention represents a contingent gain, which will be recognized when all contingencies have been resolved, which generally occurs at the time of final settlement or when nonrefundable cash payments are received.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share Basic earnings per common share is computed by dividing net income available to common stockholders by the weighted-average number of common shares outstanding for the period. Diluted earnings per share adjusts basic earnings per common share for the effects of potentially dilutive common shares, if the effect is not anti-dilutive. Potentially dilutive common shares include the dilutive effects of shares issuable under the 2008 and 2017 Equity Incentive Plans and shares issuable upon the conversion of preferred stock to common stock. The following table reconciles the basic earnings per share computation to the diluted earnings per share computation (in millions, except share and per share amounts) : 2017 2016 2015 Net income available to common stockholders for purposes of computing basic and diluted earnings per share $ 961.8 $ 477.9 $ 483.3 Weighted-average number of shares outstanding (in thousands) : Basic shares 104,728 107,560 109,709 Effect of dilution 312 201 206 Diluted shares 105,040 107,761 109,915 Earnings per share: Basic earnings per share $ 9.18 $ 4.44 $ 4.41 Diluted earnings per share $ 9.16 $ 4.43 $ 4.40 Potentially dilutive shares excluded from the calculation ( in thousands ): 2017 2016 2015 Stock options excluded as their inclusion would be anti-dilutive 150 185 84

Property and Equipment (includi

Property and Equipment (including Concession Assets)	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Property and Equipment (including Concession Assets)	Property and Equipment (including Concession Assets) The following tables list the major categories of property and equipment, including concession assets, as well as the weighted-average composite depreciation rate for each category ( in millions ): As of December 31, 2017 Cost Accumulated Depreciation Net Book Value Depreciation Rates for 2017 Land $ 218.6 $ — $ 218.6 N/A Concession land rights 141.2 (26.5 ) 114.7 1.0 % Rail and other track material 1,967.0 (425.9 ) 1,541.1 2.7-3.0% Ties 1,779.6 (441.0 ) 1,338.6 2.0-4.8% Grading 969.9 (162.1 ) 807.8 0.9 % Bridges and tunnels 775.0 (144.9 ) 630.1 1.1 % Ballast 795.2 (222.0 ) 573.2 2.3-4.2% Other (a) 1,270.4 (363.3 ) 907.1 3.2 % Total road property 7,557.1 (1,759.2 ) 5,797.9 2.8 % Locomotives 1,527.9 (375.2 ) 1,152.7 4.7 % Freight cars 937.9 (168.9 ) 769.0 2.7 % Other equipment 69.1 (26.6 ) 42.5 5.9 % Total equipment 2,534.9 (570.7 ) 1,964.2 4.0 % Technology and other 229.1 (144.4 ) 84.7 17.1 % Construction in progress 223.7 — 223.7 N/A Total property and equipment (including concession assets) $ 10,904.6 $ (2,500.8 ) $ 8,403.8 N/A _____________ (a) Other includes signals, buildings and other road assets. As of December 31, 2016 Cost Accumulated Depreciation Net Book Value Depreciation Rates for 2016 Land $ 219.2 $ — $ 219.2 N/A Concession land rights 141.2 (25.1 ) 116.1 1.0 % Rail and other track material 1,925.4 (445.0 ) 1,480.4 1.6-3.2% Ties 1,710.1 (423.8 ) 1,286.3 2.0-5.0% Grading 910.7 (153.9 ) 756.8 0.9 % Bridges and tunnels 739.4 (137.6 ) 601.8 1.1 % Ballast 748.3 (215.1 ) 533.2 2.5-4.7% Other (a) 1,152.1 (332.4 ) 819.7 3.0 % Total road property 7,186.0 (1,707.8 ) 5,478.2 2.8 % Locomotives 1,485.9 (356.9 ) 1,129.0 4.5 % Freight cars 887.7 (152.5 ) 735.2 3.5 % Other equipment 66.2 (23.6 ) 42.6 6.4 % Total equipment 2,439.8 (533.0 ) 1,906.8 4.2 % Technology and other 182.2 (126.2 ) 56.0 17.4 % Construction in progress 293.4 — 293.4 N/A Total property and equipment (including concession assets) $ 10,461.8 $ (2,392.1 ) $ 8,069.7 N/A _____________ (a) Other includes signals, buildings and other road assets. Concession assets, net of accumulated amortization of $638.2 million and $610.7 million , totaled $2,208.1 million and $2,131.6 million at December 31, 2017 and 2016 , respectively. The Company capitalized $0.3 million , $0.5 million , and $0.7 million of interest for the years ended December 31, 2017 , 2016 , and 2015 , respectively. Depreciation and amortization of property and equipment (including concession assets) totaled $320.9 million , $305.0 million and $284.6 million , for 2017 , 2016 , and 2015 , respectively.

Other Balance Sheet Captions

Other Balance Sheet Captions	12 Months Ended
	Dec. 31, 2017
Other Balance Sheet Captions [Abstract]
Other Balance Sheet Captions	Other Balance Sheet Captions Other Current Assets. Other current assets included the following items at December 31 (in millions): 2017 2016 Refundable taxes $ 81.6 $ 64.0 Mexican fuel excise tax credit 35.1 49.2 Prepaid expenses 18.3 18.2 Other 22.4 2.4 Other current assets $ 157.4 $ 133.8 Accounts Payable and Accrued Liabilities. Accounts payable and accrued liabilities included the following items at December 31 (in millions): 2017 2016 Accounts payable $ 225.1 $ 247.8 Income and other taxes 111.8 36.0 Accrued wages and vacation 89.0 78.7 Derailments, personal injury and other claim provisions 48.0 39.2 Foreign currency derivative instruments — 41.1 Dividends payable 37.2 35.2 Other 76.7 59.7 Accounts payable and accrued liabilities $ 587.8 $ 537.7

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The Company’s assets and liabilities recognized at fair value have been categorized based upon a fair value hierarchy as described in Note 2 — “Significant Accounting Policies.” As of December 31, 2017 , the Company’s derivative financial instruments are measured at fair value on a recurring basis and consist of foreign currency forward and option contracts and treasury lock agreements, which are classified as Level 2 valuations. The Company determines the fair value of its derivative financial instrument positions based upon pricing models using inputs observed from actively quoted markets and also takes into consideration the contract terms as well as other inputs, including market currency exchange rates and in the case of option contracts, volatility, the risk-free interest rate and the time to expiration. The fair value of the foreign currency derivative instruments was an asset of $7.9 million and a liability of $41.1 million at December 31, 2017 and 2016 , respectively, and the fair value of the forward treasury lock agreements was a liability of $5.6 million at December 31, 2017 . There were no outstanding treasury lock agreements at December 31, 2016 . The Company’s short-term financial instruments include cash and cash equivalents, accounts receivable, accounts payable and short-term borrowings. The carrying value of the short-term financial instruments approximates their fair value. The fair value of the Company’s debt is estimated using quoted market prices when available. When quoted market prices are not available, fair value is estimated based on current market interest rates for debt with similar maturities and credit quality. The fair value of the Company’s debt was $2,377.8 million and $2,303.8 million at December 31, 2017 and 2016 , respectively. The carrying value was $2,274.3 million and $2,296.9 million at December 31, 2017 and 2016 , respectively. If the Company’s debt were measured at fair value, the fair value measurements of the individual debt instruments would have been classified as either Level 1 or Level 2 in the fair value hierarchy.

Derivative Instruments

Derivative Instruments	12 Months Ended
	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative Instruments The Company enters into derivative transactions in certain situations based on management’s assessment of current market conditions and perceived risks. Management intends to respond to evolving business and market conditions and in doing so, may enter into such transactions as deemed appropriate. Credit Risk. As a result of the use of derivative instruments, the Company is exposed to counterparty credit risk. The Company manages this risk by limiting its counterparties to large financial institutions which meet the Company’s credit rating standards and have an established banking relationship with the Company. As of December 31, 2017 , the Company did not expect any losses as a result of default of its counterparties. Interest Rate Derivative Instruments . In May 2017, the Company executed four treasury lock agreements with an aggregate notional value of $275.0 million and a weighted-average interest rate of 2.85% . The purpose of the treasury locks is to hedge the U.S. Treasury benchmark interest rate associated with future interest payments related to the anticipated refinancing of the $275.0 million , 2.35% senior notes due May 15, 2020 . The Company has designated the treasury locks as cash flow hedges and recorded unrealized gains and losses in accumulated other comprehensive income. Upon settlement, the unrealized gain or loss in accumulated other comprehensive income will be amortized to interest expense over the life of the future underlying debt issuance. Foreign Currency Derivative Instruments. The Company’s Mexican subsidiaries have net U.S. dollar-denominated monetary liabilities which, for Mexican income tax purposes, are subject to periodic revaluation based on changes in the value of the Mexican peso against the U.S. dollar. This revaluation creates fluctuations in the Company’s Mexican income tax expense and the amount of income taxes paid in Mexico. The Company hedges its exposure to this cash tax risk by entering into foreign currency forward contracts and foreign currency option contracts known as zero-cost collars. The foreign currency forward contracts involve the Company’s purchase of pesos at an agreed-upon weighted-average exchange rate to each U.S dollar. The zero-cost collars involve the Company’s purchase of a Mexican peso call option and a simultaneous sale of a Mexican peso put option, with equivalent U.S. dollar notional amounts for each option and no net cash premium paid by the Company. The Company does not physically exchange currencies upon maturity or expiration of its forward contracts or zero-cost collars. Instead, the Company settles the maturing/expiring transactions by entering into offsetting transactions, which results in a physical exchange of only the net gain or loss between the Company and the counterparty. Below is a summary of the Company’s 2017, 2016 and 2015 foreign currency derivative contracts (amounts in millions, except Ps./USD) : Foreign currency forward contracts Contracts to purchase Ps./pay USD Offsetting contracts to sell Ps./receive USD Notional amount Notional amount Weighted-average exchange rate (in Ps./USD) Maturity date Notional amount Notional amount Weighted-average exchange rate (in Ps./USD) Maturity date Cash received/(paid) on settlement Contracts executed in 2016 and settled in 2017 $ 340.0 Ps. 6,207.7 Ps. 18.3 1/17/2017 $ 287.0 Ps. 6,207.7 Ps. 21.6 1/17/2017 $ (53.0 ) Contracts executed in 2016 and settled in 2016 $ 60.0 Ps. 1,057.3 Ps. 17.6 4/29/2016 $ 60.7 Ps. 1,057.3 Ps. 17.4 4/29/2016 $ 0.7 Contracts executed in 2015 and settled in 2016 $ 300.0 Ps. 4,480.4 Ps. 14.9 1/15/2016 $ 251.0 Ps. 4,480.4 Ps. 17.9 1/15/2016 $ (49.0 ) Contracts executed in 2014 and settled in 2015 $ 300.0 Ps. 4,364.7 Ps. 14.6 1/15/2015 $ 298.8 Ps. 4,364.7 Ps. 14.6 1/15/2015 $ (1.2 ) Foreign currency zero-cost collar contracts Notional amount Maturity date Weighted-average call rate outstanding options (in Ps./USD) Weighted-average put rate outstanding options (in Ps./USD) Cash received/(paid) on settlement Contracts executed in 2017 and outstanding at December 31, 2017 $ 80.0 1/16/2018 Ps. 21.7 Ps. 24.8 — Contracts executed in 2017 and settled in 2017 $ 450.0 — — — $ 42.2 Contracts executed in 2015 and settled in 2016 $ 80.0 — — — $ (10.1 ) Contracts executed in 2015 and settled in 2015 $ 50.0 — — — $ (4.3 ) The Company has not designated any of the foreign currency derivative contracts as hedging instruments for accounting purposes. The Company measures the foreign currency derivative contracts at fair value each period and recognizes any change in fair value in foreign exchange gain (loss) within the consolidated statements of income. The following table presents the fair value of derivative instruments included in the consolidated balance sheets at December 31 (in millions) : Derivative Assets Balance Sheet Location 2017 2016 Derivatives not designated as hedging instruments: Foreign currency zero-cost collar contracts Other current assets $ 7.9 $ — Total derivatives not designated as hedging instruments 7.9 — Total derivative assets $ 7.9 $ — Derivative Liabilities Balance Sheet Location 2017 2016 Derivatives designated as hedging instruments: Treasury lock agreements Other noncurrent liabilities and deferred credits $ 5.6 $ — Total derivatives designated as hedging instruments 5.6 — Derivatives not designated as hedging instruments: Foreign currency forward contracts Accounts payable and accrued liabilities — 41.1 Total derivatives not designated as hedging instruments — 41.1 Total derivative liabilities $ 5.6 $ 41.1 The following table presents the effects of derivative instruments on the consolidated statements of income and consolidated statements of comprehensive income for the years ended December 31 (in millions) : Derivatives in Cash Flow Hedging Relationships Amount of Gain/(Loss) Recognized in OCI on Derivative 2017 2016 2015 Treasury lock agreements $ (5.6 ) $ — $ — Total $ (5.6 ) $ — $ — Derivatives Not Designated as Hedging Instruments Location of Gain/(Loss) Recognized in Income on Derivative Amount of Gain/(Loss) Recognized in Income on Derivative 2017 2016 2015 Foreign currency forward contracts Foreign exchange gain (loss) $ (11.9 ) $ (49.6 ) $ (36.7 ) Foreign currency zero-cost collar contracts Foreign exchange gain (loss) 50.1 (3.9 ) (10.5 ) Total $ 38.2 $ (53.5 ) $ (47.2 )

Short-Term Borrowings

Short-Term Borrowings	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Short-Term Borrowings	Short-Term Borrowings Commercial Paper. The Company’s commercial paper program generally serves as the primary means of short-term funding. As of December 31, 2017 , KCS had $345.1 million of commercial paper outstanding, net of $0.1 million discount, at a weighted-average interest rate of 1.846% . As of December 31, 2016 , KCS had $181.3 million of commercial paper outstanding, net of $0.1 million discount, at a weighted-average interest rate of 1.290% .

Long-Term Debt

Long-Term Debt	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt Long-term debt at December 31 (in millions): 2017 2016 Principal Unamortized Discount and Debt Issuance Costs Net Principal Unamortized Discount and Debt Issuance Costs Net Revolving credit facilities, variable interest rate, due 2020 $ — $ — $ — $ — $ — $ — KCS 2.35% senior notes, due 2020 257.3 1.2 256.1 257.3 1.7 255.6 KCS 3.00% senior notes, due 2023 439.1 4.0 435.1 439.1 4.7 434.4 KCS 3.85% senior notes, due 2023 199.2 1.7 197.5 199.2 2.0 197.2 KCS 3.125% senior notes, due 2026 250.0 3.1 246.9 250.0 3.4 246.6 KCS 4.30% senior notes, due 2043 448.7 9.3 439.4 448.7 9.6 439.1 KCS 4.95% senior notes, due 2045 499.2 7.6 491.6 499.2 8.0 491.2 KCSR senior notes 3.85% to 4.95%, due through 2045 2.9 — 2.9 2.9 — 2.9 KCSM senior notes 2.35% to 3.00%, due through 2023 28.5 0.2 28.3 28.5 0.2 28.3 RRIF loans 2.96% to 4.29%, due serially through 2037 77.8 0.5 77.3 81.4 0.5 80.9 Financing agreements 5.737% to 9.310%, due serially through 2023 84.2 0.3 83.9 102.5 0.4 102.1 Capital lease obligations, due serially to 2024 15.0 — 15.0 18.3 — 18.3 Other debt obligations 0.3 — 0.3 0.3 — 0.3 Total 2,302.2 27.9 2,274.3 2,327.4 30.5 2,296.9 Less: Debt due within one year 38.8 — 38.8 25.4 — 25.4 Long-term debt $ 2,263.4 $ 27.9 $ 2,235.5 $ 2,302.0 $ 30.5 $ 2,271.5 Revolving Credit Facility KCS with certain of its domestic subsidiaries named therein as guarantors, has an $800.0 million revolving credit facility (the “KCS Revolving Credit Facility”), with a $25.0 million standby letter of credit facility which, if utilized, constitutes usage under the revolving facility. The KCS Revolving Credit Facility serves as a backstop for KCS’s $800.0 million commercial paper program (the “KCS Commercial Paper Program”) which generally serves as the Company’s primary means of short-term funding. Borrowings under the KCS Revolving Credit Facility bear interest at floating rates. Depending on the Company’s credit rating, the margin that KCS pays above the London Interbank Offered Rate (“LIBOR”) at any point is between 1.125% and 2.0% . As of December 31, 2017 , the margin was 1.5% based on KCS’s current credit rating. The KCS Revolving Credit Facility is guaranteed by KCSR, together with certain domestic subsidiaries named therein as guarantors (the “Subsidiary Guarantors”) and matures on December 9, 2020 . The KCS Revolving Credit Facility agreement contains representations, warranties, covenants (including financial covenants related to a leverage ratio and an interest coverage ratio) and events of default that are customary for credit agreements of this type. The occurrence of an event of default could result in the termination of the commitments and the acceleration of the repayment of any outstanding principal balance on the KCS Revolving Credit Facility and the KCS Commercial Paper Program. As of December 31, 2017 and 2016 , KCS had no outstanding borrowings under the KCS Revolving Credit Facility. Senior Notes The Company’s senior notes include certain covenants which are customary for these types of debt instruments issued by borrowers with similar credit ratings. The KCS Notes are unsecured and unsubordinated obligations of the Company and are unconditionally guaranteed, jointly and severally, by KCSR and each current and future domestic subsidiary of KCS that guarantees the KCS Revolving Credit Facility or certain other debt of KCS or a Note Guarantor (collectively, the “Note Guarantors”). KCSR’s senior notes are unconditionally guaranteed, jointly and severally, on an unsecured senior basis, by KCS and each current and future domestic subsidiary of KCS that guarantees the KCS Revolving Credit Facility or certain other debt of KCS or a note guarantor. KCSR’s senior notes and the note guarantees rank pari passu in right of payment with KCSR’s, KCS’s and the Note Guarantors’ existing and future unsecured, unsubordinated obligations. KCSM’s senior notes are denominated in U.S. dollars; are unsecured, unsubordinated obligations; rank pari passu in right of payment with KCSM’s existing and future unsecured, unsubordinated obligations and are senior in right of payment to KCSM’s future subordinated indebtedness. Senior notes are redeemable at the issuer’s option, in whole or in part, at any time, by paying the greater of either 100% of the principal amount to be redeemed and a formula price based on interest rates prevailing at the time of redemption and time remaining to maturity. In addition, KCSM senior notes are redeemable, in whole but not in part, at KCSM’s option at any time at a redemption price of 100% of their principal amount, plus any accrued unpaid interest in the event of certain changes in the Mexican withholding tax rate. RRIF Loan Agreements The following loans were made under the Railroad Rehabilitation and Improvement Financing (“RRIF”) Program administered by the Federal Railroad Administration (“FRA”): KCSR RRIF Loan Agreement. On February 21, 2012, KCSR entered into an agreement with the FRA to borrow $54.6 million to be used to reimburse KCSR for a portion of the purchase price of thirty new locomotives (the “Locomotives”) acquired by KCSR in the fourth quarter of 2011. The loan bears interest at 2.96% annually and the principal balance amortizes quarterly with a final maturity of February 24, 2037 . The obligations under the financing agreement are secured by a first priority security interest in the Locomotives and certain related rights. In addition, the Company has agreed to guarantee repayment of the amounts due under the financing agreement and certain related agreements. The occurrence of an event of default could result in the acceleration of the repayment of any outstanding principal balance of the loan. Tex-Mex RRIF Loan Agreement. On June 28, 2005, Tex-Mex entered into an agreement with the FRA to borrow $50.0 million to be used for infrastructure improvements in order to accommodate growing freight rail traffic related to the NAFTA corridor. The loan bears interest at 4.29% annually and the principal balance amortizes quarterly with a final maturity of July 13, 2030 . The loan is guaranteed by Mexrail, which has issued a pledge agreement in favor of the lender equal to the gross revenues earned by Mexrail on per-car fees on traffic crossing the International Rail Bridge in Laredo, Texas. In addition, the Company has agreed to guarantee the scheduled principal payment installments due to the FRA from Tex-Mex under the loan agreement on a rolling five-year basis. Locomotive Financing Agreements During 2008 and 2011, KCSM entered into various financing agreements totaling $216.0 million to purchase locomotives. The agreements mature between December 2020 and September 2023 , are payable on a quarterly or semi-annual basis and contain annual interest rates ranging between 5.737% and 9.310% . KCSM has either granted the lender a security interest in the locomotives to secure the loan or has secured the loans by transferring legal ownership of the locomotives to irrevocable trusts established by KCSM to which the lender is the primary beneficiary and KCSM has a right of reversion upon satisfaction of the obligations of the loan agreements. KCSM’s locomotive financing agreements contain representations, warranties and covenants typical of such equipment loan agreements. Events of default in the financing agreements include, but are not limited to, certain payment defaults, certain bankruptcy and liquidation proceedings and the failure to perform any covenants or agreements contained in the financing agreements. Any event of default could trigger acceleration of KCSM’s payment obligations under the terms of the financing agreements. Debt Covenants Compliance The Company was in compliance with all of its debt covenants as of December 31, 2017 . Other Debt Provisions Certain loan agreements and debt instruments entered into or guaranteed by the Company and its subsidiaries provide for default in the event of a specified change in control of the Company or particular subsidiaries of the Company. Leases and Debt Maturities The Company leases transportation equipment, as well as office and other operating facilities, under various capital and operating leases. Rental expenses under operating leases were $59.5 million , $61.0 million , and $63.9 million for the years ended December 31, 2017 , 2016 and 2015 , respectively. Operating leases that contain scheduled rent adjustments are recognized on a straight-line basis over the term of the lease. Contingent rentals and sublease rentals were not significant. Minimum annual payments and present value thereof under existing capital leases, other debt maturities and minimum annual rental commitments under non-cancelable operating leases are as follows (in millions) : Long- Term Debt Capital Leases Total Debt Years Minimum Lease Payments Less Interest Net Present Value Operating Leases Total 2018 $ 35.2 $ 4.9 $ 1.3 $ 3.6 $ 38.8 $ 60.9 $ 99.7 2019 15.5 3.6 0.9 2.7 18.2 52.1 70.3 2020 299.0 2.7 0.8 1.9 300.9 41.8 342.7 2021 12.3 2.7 0.6 2.1 14.4 28.2 42.6 2022 12.4 2.7 0.4 2.3 14.7 21.5 36.2 Thereafter 1,912.8 2.5 0.1 2.4 1,915.2 77.2 1,992.4 Total $ 2,287.2 $ 19.1 $ 4.1 $ 15.0 $ 2,302.2 $ 281.7 $ 2,583.9 In the normal course of business, the Company enters into long-term contractual requirements for future goods and services needed for the operations of the business. Such commitments are not in excess of expected requirements and are not reasonably likely to result in performance penalties or payments that would have a material adverse effect on the Company’s liquidity.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Current income tax expense represents the amounts expected to be reported on the Company’s income tax returns, and deferred tax expense or benefit represents the change in net deferred tax assets and liabilities. Deferred tax assets and liabilities are determined based on the difference between the financial statement and tax bases of assets and liabilities as measured by the enacted tax rates that will be in effect when these differences reverse. Valuation allowances are recorded as appropriate to reduce deferred tax assets to the amount considered likely to be realized. On December 22, 2017, the President of the United States signed into law the Tax Reform Act. The legislation significantly changes U.S. tax law by, among other things, lowering corporate income tax rates, implementing a territorial tax system and imposing a repatriation tax on deemed repatriated earnings of foreign subsidiaries. The Tax Reform Act permanently reduces the U.S. corporate income tax rate from a maximum of 35% to a flat 21% rate, effective January 1, 2018. The Company uses the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to reverse. As a result of the reduction in the U.S. corporate income tax rate from 35% to 21% under the Tax Reform Act, the Company revalued its ending net deferred tax liabilities at December 31, 2017 and recognized a provisional $487.6 million tax benefit in the Company’s consolidated statement of income for the year ended December 31, 2017. The Tax Reform Act provided for a one-time deemed mandatory repatriation of post-1986 undistributed foreign subsidiary earnings and profits (“E&P”) through the year ended December 31, 2017. The Company had an estimated $1,479.2 million of undistributed foreign E&P subject to the deemed mandatory repatriation and recognized a provisional $74.6 million of income tax expense in the Company’s consolidated statement of income for the year ended December 31, 2017. After the utilization of existing tax credits, the Company expects to pay additional U.S. federal cash taxes of approximately $44.9 million on the deemed mandatory repatriation, payable over eight years. While the Tax Reform Act provides for a territorial tax system, beginning in 2018, it includes two new U.S. tax base erosion provisions, the global intangible low-taxed income (“GILTI”) provisions and the base-erosion and anti-abuse tax (“BEAT”) provisions. The GILTI provisions require the Company to include in its U.S. income tax return foreign subsidiary earnings in excess of an allowable return on the foreign subsidiary’s tangible assets. The Company expects that it will be subject to incremental U.S. tax on GILTI income beginning in 2018, due to expense allocations required by the U.S. foreign tax credit rules. The Company has elected to account for GILTI tax in the period in which it is incurred, and therefore has not provided any deferred tax impacts of GILTI in its consolidated financial statements for the year ended December 31, 2017. The BEAT provisions in the Tax Reform Act eliminates the deduction of certain base-erosion payments made to related foreign corporations, and impose a minimum tax if greater than regular tax. The Company does not expect it will be subject to this tax and therefore has not included any tax impacts of BEAT in its consolidated financial statements for the year ended December 31, 2017. On December 22, 2017, the SEC staff issued Staff Accounting Bulletin No. 118 (“SAB 118”) to address the application of U.S. GAAP in situations when a registrant does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the Tax Reform Act. The Company has recognized the provisional tax impacts related to deemed repatriated earnings and the revaluation of deferred tax assets and liabilities and included these amounts in its consolidated financial statements for the year ended December 31, 2017. The ultimate impact may differ from these provisional amounts, possibly materially, due to, among other things, additional analysis, changes in interpretations and assumptions the Company has made, additional regulatory guidance that may be issued, and actions the Company may take as a result of the Tax Reform Act. The accounting is expected to be complete when the 2017 U.S. corporate income tax return is filed in 2018. Tax Expense (Benefit). Income tax expense (benefit) consists of the following components (in millions): 2017 2016 2015 Current: Federal $ 47.3 $ 1.0 $ — State and local 0.6 0.6 0.3 Foreign 163.8 76.4 51.2 Total current 211.7 78.0 51.5 Deferred: Federal (350.1 ) 92.7 109.3 State and local 11.9 13.1 15.5 Foreign 36.9 (1.0 ) 11.0 Total deferred (301.3 ) 104.8 135.8 Total income tax expense (benefit) $ (89.6 ) $ 182.8 $ 187.3 Income before income taxes consists of the following (in millions) : 2017 2016 2015 Income before income taxes: U.S. $ 331.8 $ 279.9 $ 315.0 Foreign 542.5 382.8 357.6 Total income before income taxes $ 874.3 $ 662.7 $ 672.6 The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31 follow (in millions): 2017 2016 Assets: Tax credit and loss carryovers $ 26.9 $ 70.7 Reserves not currently deductible for tax 54.1 106.4 Other 25.2 31.6 Gross deferred tax assets before valuation allowance 106.2 208.7 Valuation allowance (2.1 ) (1.7 ) Net deferred tax assets 104.1 207.0 Liabilities: Property (1,012.7 ) (1,389.0 ) Investments (48.0 ) (73.8 ) Other (30.6 ) (33.5 ) Gross deferred tax liabilities (1,091.3 ) (1,496.3 ) Net deferred tax liability $ (987.2 ) $ (1,289.3 ) Tax Rates. Differences between the Company’s effective income tax rate and the U.S. federal statutory income tax rate of 35% follow (in millions): 2017 2016 2015 Dollars Percent Dollars Percent Dollars Percent Income tax expense using the statutory rate in effect $ 306.0 35.0 % $ 231.9 35.0 % $ 235.4 35.0 % Tax effect of: Difference between U.S. and foreign tax rate (25.1 ) (2.9 %) (17.4 ) (2.6 %) (17.8 ) (2.6 %) Foreign exchange (i) 31.6 3.6 % (45.0 ) (6.8 %) (40.5 ) (6.1 %) State and local income tax provision, net 8.3 1.0 % 8.1 1.2 % 10.3 1.5 % Change in U.S. tax rate (487.6 ) (55.8 %) — — — — Deemed mandatory repatriation 74.6 8.6 % — — — — Other, net 2.6 0.3 % 5.2 0.8 % (0.1 ) — Income tax expense (benefit) $ (89.6 ) (10.2 %) $ 182.8 27.6 % $ 187.3 27.8 % _____________________ (i) Mexican income taxes are paid in Mexican pesos, and as a result, the effective income tax rate reflects fluctuations in the value of the Mexican peso against the U.S. dollar. The foreign exchange impact on income taxes includes the gain or loss from the revaluation of the Company’s net U.S. dollar-denominated monetary liabilities into Mexican pesos which is included in Mexican taxable income under Mexican tax law. As a result, a strengthening of the Mexican peso against the U.S. dollar for the reporting period will generally increase the Mexican cash tax obligation and the effective income tax rate, and a weakening of the Mexican peso against the U.S. dollar for the reporting period will generally decrease the Mexican cash tax obligation and the effective tax rate. To hedge its exposure to this cash tax risk, the Company enters into foreign currency derivative contracts, which are measured at fair value each period and any change in fair value is recognized in foreign exchange gain (loss) within the consolidated statements of income. Refer to Note 9 “Derivative Instruments” for further information. Difference Attributable to Foreign Investments. As a result of the deemed mandatory repatriation provisions in the Tax Reform Act, the Company included an estimated $1,479.2 million of undistributed earnings in income subject to U.S. tax at reduced tax rates. The Company does not intend to distribute earnings in a taxable manner, and therefore intends to limit distributions to earnings previously taxed in the U.S., or earnings that would qualify for the 100 percent dividends received deduction provided for in the Tax Reform Act, and earnings that would not result in any significant foreign taxes. As a result, the Company has not recognized a deferred tax liability on its investment in foreign subsidiaries. Tax Carryovers. The Company has U.S. state net operating losses which are carried forward from 5 to 20 years and are analyzed each year to determine the likelihood of realization. The state loss carryovers arise from both combined and separate tax filings from as early as 1999 and may expire as early as December 31, 2018 and as late as December 31, 2037. The state loss carryover at December 31, 2017 , was $426.2 million . The Mexico federal loss carryovers at December 31, 2017 , were $8.4 million and, if not used, will begin to expire in 2026. A deferred tax asset was recognized in prior periods for the expected future tax benefit of these losses which will be carried forward to reduce only Mexican income tax payable in future years. The valuation allowance for deferred tax assets as of December 31, 2017 and 2016 , was $2.1 million and $1.7 million , respectively. The Company believes it is more likely than not that reversals of existing temporary differences that will produce future taxable income and the results of future operations will generate sufficient taxable income to realize the deferred tax assets, net of valuation allowances, related to loss carryovers. Uncertain Tax Positions. The accounting guidance for uncertainty in income taxes prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. The guidance requires the Company to recognize in the consolidated financial statements the benefit of a tax position only if the impact is more likely than not of being sustained on audit based on the technical merits of the position. A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows ( in millions ): 2017 2016 Balance at January 1, $ 3.8 $ 1.7 Additions based on tax positions related to the current year — 1.3 Additions for tax positions of prior years — 2.5 Reductions for tax positions of prior years (0.1 ) — Reductions as a result of lapse of statute of limitations (3.7 ) (1.7 ) Balance at December 31, $ — $ 3.8 A tax benefit of $3.7 million was recognized in the third quarter of 2017 relating to a previous uncertain tax position as a result of a lapse of the statute of limitations. Interest and penalties related to uncertain tax positions are included in income before taxes on the consolidated statements of income. Accrued interest and penalties on unrecognized tax benefits and interest and penalty expense was immaterial to the consolidated financial statements for all periods presented. Tax Contingencies . Tax returns filed in the U.S. for periods after 2013 and in Mexico for periods after 2011 remain open to examination by the taxing authorities. The Servicio de Administración Tributaria (the “SAT”), the Mexican equivalent of the IRS, completed the examination of the KCSM 2011 Mexico tax return during the third quarter of 2017 without adjustment. An SAT examination was completed during the second quarter of 2017 without adjustment for the KCSM Servicios 2013 Mexico tax return. The Company received audit assessments from the SAT during the first quarter of 2017 for the KCSM 2009 and 2010 Mexico tax returns. The Company commenced administrative actions with the SAT and if these assessments are not nullified, the matters will be litigated. The Company believes that it has strong legal arguments in its favor and it is more likely than not that the Company will prevail in any challenge of the assessments. The Company litigated a Value Added Tax (“VAT”) audit assessment from the SAT for KCSM for the year ended December 31, 2005. In November 2016, KCSM was notified of a resolution by the Mexican tax court annulling this assessment. The SAT appealed this resolution to the Mexican circuit court. In September 2017, KCSM was notified of a resolution by the circuit court which ordered the tax court to consider an argument made by KCSM in the original tax court proceeding that was not addressed in the tax court’s November 2016 resolution. In October 2017, the tax court ruled that the arguments made by KCSM asserting that the SAT unduly extended the audit process were not valid, and also annulled the assessment consistent with the tax courts earlier November 2016 ruling. In December 2017, KCSM and the SAT filed an appeal with the Federal Courts of Appeals. The Company believes it is probable that the court will continue to annul the 2005 VAT assessment. Further, the Company believes it is more likely than not that the SAT will ultimately be precluded from issuing a new 2005 VAT audit assessment. In the unexpected event that the SAT is provided the opportunity to issue a new 2005 VAT audit assessment, the Company cannot predict if the SAT would issue a new assessment or the basis of any new assessment. Accordingly, the Company is not able to estimate any related potential exposure. KCSM has not historically assessed VAT on international import transportation services provided to its customers based on a written ruling that KCSM obtained from the SAT in 2008 stating that such services were not subject to VAT (the “2008 Ruling”). Notwithstanding the 2008 Ruling, in December 2013, the SAT unofficially informed KCSM of an intended implementation of new criteria effective as of January 1, 2014, pursuant to which VAT would be assessed on all international import transportation services on the portion of the services provided within Mexico. Additionally, in November 2013, the SAT filed an action to nullify the 2008 Ruling, potentially exposing the application of the new criteria to open tax years. In February 2014, KCSM filed an action opposing the SAT’s nullification action. In December 2016, KCSM was notified of a resolution issued by the Mexican tax court confirming the 2008 Ruling. The SAT appealed this resolution. In October 2017, the Circuit Court resolved to not render a decision on the case but rather to send the SAT’s appeal to the Supreme Court. The Supreme Court will decide whether it will hear the case and render a decision, or remand the SAT’s appeal back to the Circuit Court for a decision. The Company believes it is more likely than not that it will continue to prevail in this matter. Further, as of the date of this filing, the SAT has not implemented any new criteria regarding this assessment of VAT on international import transportation services. The Company believes it is probable that any unexpected nullification of the 2008 Ruling and the implementation of any new VAT criteria would be applied on a prospective basis, in which case, due to the pass-through nature of VAT, KCSM would begin to assess its customers for VAT on international import transportation services, resulting in no material impact to the Company’s consolidated financial statements.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2017
Stockholders' Equity Note [Abstract]
Stockholders' Equity	Stockholders’ Equity Information regarding the Company’s capital stock at December 31 follows: Shares Authorized Shares Issued 2017 2016 2017 2016 $25 par, 4% noncumulative, preferred stock 840,000 840,000 649,736 649,736 $1 par, preferred stock 2,000,000 2,000,000 — — $.01 par, common stock 400,000,000 400,000,000 123,352,185 123,352,185 Shares outstanding at December 31: 2017 2016 $25 par, 4% noncumulative, preferred stock 242,170 242,170 $.01 par, common stock 103,036,805 106,606,619 Share Repurchase Programs. During the first half of 2017, KCS concluded its $500.0 million share repurchase program, announced in May 2015 (the “2015 Program”). In August 2017, the Company announced a new share repurchase program of up to $800.0 million , which expires on June 30, 2020 (the “2017 Program”). Share repurchases may be made in the open market, through privately negotiated transactions, or through an accelerated share repurchase (“ASR”) program limited to $200.0 million . Under an ASR agreement, the Company pays a specified amount to a financial institution and receives an initial delivery of shares. Upon settlement of the ASR agreement, typically the financial institution delivers additional shares, with the final aggregate number of shares delivered determined with reference to the volume weighted-average price per share of the Company’s common stock over the term of the ASR agreement, less a negotiated discount. The transactions are accounted for as equity transactions with any excess of repurchase price over par value allocated between additional paid-in capital and retained earnings. At the time the shares are received, there is an immediate reduction in the weighted-average number of shares outstanding for purposes of the basic and diluted earnings per share computation. During the second half of 2017, the Company entered into and settled two ASR agreements under its ASR program. In total, the Company repurchased 1,901,769 shares of common stock at an average price of $105.17 per share and a cost of $200.0 million . During 2017, KCS repurchased 1,340,209 shares of common stock for $120.4 million at an average price of $89.83 per share under the 2015 Program, and 2,419,469 shares of common stock for $255.2 million at an average price of $105.48 per share under the 2017 Program. In total during 2017, the Company repurchased 3,759,678 shares at an average price of $99.90 per share and a total cost of $375.6 million under both the 2015 Program and the 2017 Program. Treasury Stock. Shares of common stock in treasury and related activity follow: 2017 2016 2015 Balance at beginning of year 16,745,566 14,891,041 12,959,855 Shares repurchased 3,759,678 2,127,612 2,133,984 Shares issued to fund stock option exercises (9,110 ) (15,264 ) (89,035 ) Employee stock purchase plan shares issued (76,401 ) (82,372 ) (52,736 ) Nonvested shares issued (124,519 ) (179,309 ) (62,936 ) Nonvested shares forfeited 20,166 3,858 1,909 Balance at end of year 20,315,380 16,745,566 14,891,041 Change in Control Provisions. The Company and certain of its subsidiaries have entered into agreements with certain employees whereby, upon defined circumstances constituting a change in control of the Company or subsidiary, certain stock options become exercisable, certain benefit entitlements are automatically funded and such employees are entitled to specified cash payments upon termination of employment. The Company and certain of its subsidiaries have established trusts to provide for the funding of corporate commitments and entitlements of certain officers, directors, employees and others in the event of a specified change in control of the Company or subsidiary. Assets held in such trusts on December 31, 2017 and 2016 , were not material. Depending upon the circumstances at the time of any such change in control, the most significant of which would be the price paid for KCS common stock by a party seeking to control the Company, funding of the Company’s trusts could be substantial. Cash Dividends on Common Stock. The following table presents the amount of cash dividends declared per common share by the Company’s Board of Directors: 2017 2016 2015 Cash dividends declared per common share $ 1.38 $ 1.32 $ 1.32

Share-Based Compensation

Share-Based Compensation	12 Months Ended
	Dec. 31, 2017
Share-based Compensation [Abstract]
Share-Based Compensation	Share-Based Compensation On May 4, 2017, the Company’ stockholders approved the Kansas City Southern 2017 Equity Incentive Plan (the “2017 Plan”), which replaced the Kansas City Southern 2008 Stock Option and Performance Award Plan (the “2008 Plan”). The Board of Directors and its Compensation and Organization Committee had previously adopted the 2017 Plan, subject to stockholder approval, on January 26, 2017, and February 17, 2017, respectively. The 2017 Plan provides for the granting of up to 3,750,000 shares of the Company’s common stock to eligible persons as defined in the 2017 Plan. Outstanding equity awards granted under the 2008 Plan and the 2017 Plan (the “Plans”) are to be governed by the terms and conditions of each individual plan and the related award agreements. Stock Options. The exercise price for options granted under the Plans equals the closing market price of the Company’s stock on the date of grant. Options generally have a 3 -year vesting period and are exercisable over the 10 -year contractual term, except that options outstanding become immediately exercisable upon certain defined circumstances constituting a change in control of the Company. The grant date fair value is recorded to expense on a straight-line basis over the vesting period. The fair value of each option award is estimated on the date of grant using the Black-Scholes option pricing model. The weighted-average assumptions used were as follows: 2017 2016 2015 Expected dividend yield 1.52 % 1.60 % 0.94 % Expected volatility 30.74 % 32.29 % 37.11 % Risk-free interest rate 2.20 % 1.51 % 1.82 % Expected term (years) 6.0 6.0 6.0 Weighted-average grant date fair value of stock options granted $ 24.49 $ 22.98 $ 41.49 The expected dividend yield is calculated as the ratio of dividends paid per share of common stock to the stock price on the date of grant. The expected volatility is based on the historical volatility of the Company’s stock price over a term equal to the estimated life of the options. The risk-free interest rate is determined based on U.S. Treasury rates for instruments with terms approximating the expected term of the options granted, which represents the period of time the awards are expected to be outstanding and is based on the historical experience of similar awards. A summary of stock option activity is as follows: Number of Shares Weighted- Average Exercise Price Per Share Weighted- Average Remaining Contractual Term Aggregate Intrinsic Value In years In millions Options outstanding at December 31, 2016 414,803 $ 76.87 Granted 97,090 87.11 Exercised (9,110 ) 80.32 Forfeited or expired (2,159 ) 88.35 Options outstanding at December 31, 2017 500,624 $ 78.74 6.1 $ 14.0 Exercisable at December 31, 2017 339,711 $ 74.33 5.0 $ 11.0 The aggregate intrinsic value in the table above, which is the amount by which the market value of the underlying stock exceeded the exercise price of outstanding options, represents the amount optionees would have realized if all in-the-money options had been exercised on the last business day of the period indicated. Compensation cost of $2.3 million , $2.5 million , and $2.0 million was recognized for stock option awards for the years ended December 31, 2017 , 2016 , and 2015 , respectively. The total income tax benefit recognized in the consolidated statements of income was $0.8 million , $0.9 million , and $0.7 million for the years ended December 31, 2017 , 2016 and 2015 , respectively. Additional information regarding stock option exercises appears in the table below (in millions) : 2017 2016 2015 Aggregate grant-date fair value of stock options vested $ 2.8 $ 1.8 $ 2.0 Intrinsic value of stock options exercised 0.2 0.6 6.1 Cash received from option exercises 0.7 0.9 4.2 Tax benefit from options exercised during the annual period 0.1 0.2 2.3 As of December 31, 2017 , $1.2 million of unrecognized compensation cost relating to nonvested stock options is expected to be recognized over a weighted-average period of 1.0 year. At December 31, 2017 , there were 3,694,802 shares available for future grants under the 2017 Plan. Nonvested Stock. The Plans provide for the granting of nonvested stock awards to officers and other designated employees. The grant date fair value is based on the closing market price on the date of the grant. These awards are subject to forfeiture if employment terminates during the vesting period, which is generally 3 year or 5 year vesting for employees. Awards granted to the Company’s directors vest immediately on date of grant. The grant date fair value of nonvested shares is recorded to compensation expense on a straight-line basis over the vesting period. On February 19, 2016 the Company granted 66,320 shares of nonvested stock (“the market-based award”) under the 2008 Plan. The market-based award contained a market condition that accelerated the vesting in three tranches if the twenty trading day volume-weighted average price of the Company’s common stock was above $84.14 , $91.79 or $99.44 . The first two target prices of $84.14 and $91.79 were met in the first and second quarters of 2016, respectively, and the remaining target price of $99.44 was met in June 2017. The fair value and requisite service period of nonvested market-based awards granted on February 19, 2016 were estimated on the date of grant using the Monte Carlo simulation model. The assumptions used in the Monte Carlo simulation model are consistent with those used to value stock options and were as follows: Nonvested Stock Expected dividend yield 1.58 % Expected volatility 31.68 % Risk-free interest rate 0.53% - 1.89% Expected term (years) 1.9 Weighted-average grant date fair value $ 70.95 A summary of nonvested stock activity is as follows: Number of Shares Weighted- Average Grant Date Fair Value Aggregate Intrinsic Value In millions Nonvested stock at December 31, 2016 238,010 $ 91.55 Granted 121,307 93.29 Vested (62,472 ) 87.51 Forfeited (20,166 ) 90.83 Nonvested stock at December 31, 2017 276,679 $ 93.28 $ 29.1 The fair value (at vest date) of shares vested during the years ended December 31, 2017 , 2016 , and 2015 was $5.9 million , $7.0 million , and $6.4 million , respectively. The weighted-average grant date fair value of nonvested stock granted during 2017 , 2016 , and 2015 was $93.29 , $80.92 and $112.03 , respectively. Compensation cost for nonvested stock and market-based awards was $9.3 million , $9.6 million , and $5.1 million for the years ended December 31, 2017 , 2016 , and 2015 , respectively. The total income tax benefit recognized in the consolidated statements of income was $3.5 million , $3.5 million , and $1.9 million for the years ended December 31, 2017 , 2016 , and 2015 , respectively. As of December 31, 2017 , $13.6 million of unrecognized compensation costs related to nonvested stock is expected to be recognized over a weighted-average period of 1.4 years. Performance Based Awards. The Company granted performance based nonvested stock awards during 2017 (the “2017 Awards”), 2016 (the “2016 Awards”) and 2015 (the “2015 Awards”). The awards granted provide a target number of shares that generally vest at the end of a 3 -year requisite service period following the grant date. In addition to the service condition, the number of nonvested shares to be received depends on the attainment of defined Company-wide performance goals based on operating ratio (“OR”) and return on invested capital (“ROIC”) over a three -year performance period. The 2017 and 2016 Awards are also subject to a revenue growth multiplier based on a three -year performance period calculated as defined in the related award agreement that can range from 80% to 140% of the award earned based on the OR and ROIC achieved. The number of nonvested shares ultimately earned will range between zero to 200% of the target award. A summary of performance based nonvested stock activity at target is as follows: Target Number of Shares * Weighted-Average Grant Date Fair Value Nonvested stock, at December 31, 2016 144,399 $ 97.08 Granted 54,588 87.09 Vested (36,323 ) 94.23 Forfeited (23,162 ) 102.30 Nonvested stock, at December 31, 2017 139,502 $ 93.05 _____________________ * For the 2017 Awards and the 2016 Awards, participants in the aggregate can earn up to a maximum of 107,888 and 105,320 shares, respectively. For the 2015 Awards, the performance shares earned were 21,397 . The weighted-average grant date fair value of performance based nonvested stock granted during 2017 , 2016 and 2015 was $87.09 , $82.71 and $119.35 , respectively. The Company expenses the grant date fair value of the awards which are probable of being earned over the performance periods. Compensation cost on performance based awards was $6.0 million , $5.7 million and $3.0 million for the years ended December 31, 2017 , 2016 and 2015 , respectively. Total income tax benefit recognized in the consolidated statements of income for performance based awards was $2.2 million , $2.1 million and $1.1 million for the years ended December 31, 2017 , 2016 and 2015 , respectively. As of December 31, 2017 , $5.6 million of unrecognized compensation cost related to performance based awards is expected to be recognized over a weighted-average period of eleven months . The fair value (at vest date) of shares vested for the year ended December 31, 2017 was $3.2 million . Employee Stock Purchase Plan. The employee stock purchase plan (“ESPP”) provides substantially all U.S. full-time employees of the Company, certain subsidiaries and certain other affiliated entities, with the right to subscribe to an aggregate of 4.0 million shares of common stock of the Company. Under the ESPP, eligible employees may contribute, through payroll deductions, up to 10% of their regular base compensation during six -month purchase periods at a purchase price equal to 85% of the closing market price on either the exercise date or the offering date, whichever is lower. At the end of each purchase period, the accumulated deductions are applied toward the purchase of the Company’s common stock. Both the discount in grant price and the share option purchase price are valued to derive the award’s fair value. The awards vest and the expense is recognized ratably over the offering period. The following table summarizes activity related to the various ESPP offerings: Exercise Date Received from Employees(i) In millions Date Issued Purchase Price Shares Issued July 2017 offering January 4, 2018 $ 89.18 30,595 $ 2.7 January 2017 offering July 5, 2017 68.70 40,293 2.8 July 2016 offering January 12, 2017 72.12 36,108 2.6 January 2016 offering July 11, 2016 62.66 41,895 2.6 July 2015 offering January 8, 2016 63.47 40,477 2.6 January 2015 offering July 6, 2015 77.52 35,097 2.7 _____________________ (i) Represents amounts received from employees through payroll deductions for share purchases under applicable offering. The fair value of the ESPP stock purchase rights is estimated on the date of grant using the Black-Scholes option pricing model. The weighted-average assumptions used for each of the respective periods were as follows: Year Ended December 31, 2017 2016 2015 Expected dividend yield 1.47 % 1.65 % 1.20 % Expected volatility 17.09 % 23.84 % 17.00 % Risk-free interest rate 0.89 % 0.46 % 0.10 % Expected term (years) 0.5 0.5 0.5 Weighted-average grant date fair value $ 17.90 $ 17.29 $ 20.55 Compensation expense of $1.3 million , $1.4 million , and $1.3 million was recognized for ESPP option awards for the years ended December 31, 2017 , 2016 , and 2015 , respectively. At December 31, 2017 , there were 3.5 million remaining shares available for future ESPP offerings under the plan.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Concession Duty. Under KCSM’s 50 -year Concession, which could expire in 2047 unless extended, KCSM pays annual concession duty expense of 1.25% of gross revenues. For the year ended December 31, 2017 , the concession duty expense, which is recorded within materials and other in operating expenses, was $17.0 million , compared to $14.9 million and $15.4 million for the same periods in 2016 and 2015 , respectively. Litigation. The Company is a party to various legal proceedings and administrative actions, all of which are of an ordinary, routine nature and incidental to its operations. Included in these proceedings are various tort claims brought by current and former employees for job-related injuries and by third parties for injuries related to railroad operations. KCS aggressively defends these matters and has established liability provisions, which management believes are adequate to cover expected costs. Although it is not possible to predict the outcome of any legal proceeding, in the opinion of management, other than those proceedings described in detail below, such proceedings and actions should not, individually, or in the aggregate, have a material adverse effect on the Company’s consolidated financial statements. ARTF Proceedings. In October 2017, the Regulatory Agency of Rail Transportation (“ARTF”) initiated proceedings against KCSM, claiming that KCSM had failed to timely delivery two technical reports (the “Technical Reports”) regarding two minor rail incidents which occurred in July and August, 2017 (the, “Technical Reports Proceedings”). KCSM believes the Technical Reports were filed on time and responded to the ARTF by providing evidence in support of its position. On December 18, 2017, KCSM was served with the ARTF´s resolutions, within which the ARTF determined that KCSM had failed to file the Technical Reports on time, and imposed minimal fines, which may result in “generic” sanctions under the Concession from the SCT. KCSM disagrees with the ARTF’s claims and intends to challenge these resolutions in the Mexican Administrative Federal Court. The Company cannot predict the outcome of these proceedings and is not able to estimate any related potential exposure. Environmental Liabilities. The Company’s U.S. operations are subject to extensive federal, state and local environmental laws and regulations. The major U.S. environmental laws to which the Company is subject include, among others, the Federal Comprehensive Environmental Response, Compensation and Liability Act (“CERCLA,” also known as the Superfund law), the Toxic Substances Control Act, the Federal Water Pollution Control Act, and the Hazardous Materials Transportation Act. CERCLA can impose joint and several liabilities for cleanup and investigation costs, without regard to fault or legality of the original conduct, on current and predecessor owners and operators of a site, as well as those who generate, or arrange for the disposal of, hazardous substances. The Company does not believe that compliance with the requirements imposed by the environmental legislation will impair its competitive capability or result in any material additional capital expenditures, operating or maintenance costs. The Company is, however, subject to environmental remediation costs as described in the following paragraphs. The Company’s Mexico operations are subject to Mexican federal and state laws and regulations relating to the protection of the environment through the establishment of standards for water discharge, water supply, emissions, noise pollution, hazardous substances and transportation and handling of hazardous and solid waste. The Mexican government may bring administrative and criminal proceedings, impose economic sanctions against companies that violate environmental laws, and temporarily or even permanently close non-complying facilities. The risk of incurring environmental liability is inherent in the railroad industry. As part of serving the petroleum and chemicals industry, the Company transports hazardous materials and has a professional team available to respond to and handle environmental issues that might occur in the transport of such materials. The Company performs ongoing reviews and evaluations of the various environmental programs and issues within the Company’s operations, and, as necessary, takes actions intended to limit the Company’s exposure to potential liability. Although these costs cannot be predicted with certainty, management believes that the ultimate outcome of identified matters will not have a material adverse effect on the Company’s consolidated financial statements. Personal Injury. The Company’s personal injury liability is based on semi-annual actuarial studies performed on an undiscounted basis by an independent third party actuarial firm and reviewed by management. This liability is based on personal injury claims filed and an estimate of claims incurred but not yet reported. Actual results may vary from estimates due to the number, type and severity of the injury, costs of medical treatments and uncertainties in litigation. Adjustments to the liability are reflected within operating expenses in the period in which changes to estimates are known. Personal injury claims in excess of self-insurance levels are insured up to certain coverage amounts, depending on the type of claim and year of occurrence. The personal injury liability as of December 31, 2017 , is based on an updated actuarial study of personal injury claims through November 30, 2017, and review of December 2017 experience. For the years ended December 31, 2017 and 2016 , the Company recognized a $3.6 million and $1.1 million reduction, respectively, in personal injury liability, due to changes in estimates as a result of the Company’s claims development and settlement experience. The personal injury liability activity was as follows (in millions): 2017 2016 Balance at beginning of year $ 23.8 $ 23.9 Accruals 4.8 4.8 Changes in estimate (3.6 ) (1.1 ) Payments (5.7 ) (3.8 ) Balance at end of year $ 19.3 $ 23.8 Tax Contingencies. Information regarding tax contingencies is included in Note 12 Income Taxes - Tax Contingencies. Contractual Agreements. In the normal course of business, the Company enters into various contractual agreements related to commercial arrangements and the use of other railroads’ or governmental entities’ infrastructure needed for the operations of the business. The Company is involved or may become involved in certain disputes involving transportation rates, product loss or damage, charges, and interpretations related to these agreements. While the outcome of these matters cannot be predicted with certainty, the Company does not believe that, when resolved, these disputes will have a material effect on its consolidated financial statements. Credit Risk. The Company continually monitors risks related to economic changes and certain customer receivables concentrations. Significant changes in customer concentration or payment experience, deterioration of customer creditworthiness or weakening in economic trends could have a significant impact on the collectability of the Company’s receivables and its operating results. If the financial condition of the Company’s customers were to deteriorate and result in an impairment of their ability to make payments, additional allowances may be required. The Company has recognized provisions for uncollectability based on its best estimate as of December 31, 2017 . Panama Canal Railway Company (”PCRC”) Guarantees and Indemnities. At December 31, 2017 , the Company had issued and outstanding $5.5 million under a standby letter of credit to fulfill its obligation to fund fifty percent of the debt service reserve and liquidity reserve established by PCRC in connection with the issuance of the 7.0% Senior Secured Notes due November 1, 2026 (the “PCRC Notes”). Additionally, KCS has pledged its shares of PCRC as security for the PCRC Notes.

Quarterly Financial Data (Unaud

Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Data [Abstract]
Quarterly Financial Data (Unaudited)	Quarterly Financial Data (Unaudited) Fourth Third Second First (In millions, except per share amounts) 2017 Revenues $ 660.4 $ 656.6 $ 656.4 $ 609.5 Operating income 237.8 (i) 233.8 (i) 239.3 (i) 210.7 (i) Net income 552.4 (iii) 129.9 134.7 146.9 Net income attributable to Kansas City Southern and subsidiaries 551.7 129.3 134.4 146.6 Per share data: Basic earnings per common share $ 5.35 $ 1.24 $ 1.27 $ 1.38 Diluted earnings per common share 5.33 1.23 1.27 1.38 2016 Revenues $ 598.5 $ 604.5 $ 568.5 $ 562.7 Operating income 210.9 (ii) 199.8 (ii) 219.9 (ii) 187.9 Net income 130.3 121.0 120.5 108.1 Net income attributable to Kansas City Southern and subsidiaries 129.6 120.6 120.1 107.8 Per share data: Basic earnings per common share $ 1.21 $ 1.12 $ 1.12 $ 1.00 Diluted earnings per common share 1.21 1.12 1.11 0.99 _____________________ (i) During the first, second, third and fourth quarters of 2017, the Company recognized an $11.7 million , $12.8 million , $11.1 million and $8.5 million benefit, respectively, related to a credit available for the excise tax included in the price of fuel that is purchased and consumed in locomotives and certain work equipment in Mexico. (ii) During the second, third and fourth quarters of 2016, the Company recognized a $34.0 million , $15.6 million and $13.2 million benefit, respectively, related to a credit available for the excise tax included in the price of fuel that is purchased and consumed in locomotives and certain work equipment in Mexico. (iii) During the fourth quarter of 2017, the Company recognized a $413.0 million net tax benefit as a result of the Tax Reform Act, which was signed into law December 22, 2017.

Geographic Information

Geographic Information	12 Months Ended
	Dec. 31, 2017
Segment Reporting [Abstract]
Geographic Information	Geographic Information The Company strategically manages its rail operations as one reportable business segment over a single coordinated rail network that extends from the midwest and southeast portions of the United States south into Mexico and connects with other Class I railroads. Financial information reported at this level, such as revenues, operating income and cash flows from operations, is used by corporate management, including the Company’s chief operating decision-maker, in evaluating overall financial and operational performance, market strategies, as well as the decisions to allocate capital resources. The Company’s chief operating decision-maker is the chief executive officer. The following tables provide information by geographic area (in millions) : Years ended December 31, 2017 2016 2015 Revenues U.S. $ 1,359.5 $ 1,210.8 $ 1,248.4 Mexico 1,223.4 1,123.4 1,170.4 Total revenues $ 2,582.9 $ 2,334.2 $ 2,418.8 December 31, 2017 2016 Property and equipment (including concession assets), net U.S. $ 5,227.3 $ 4,960.6 Mexico 3,176.5 3,109.1 Total property and equipment (including concession assets), net $ 8,403.8 $ 8,069.7

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Foreign Currency Hedging As of December 31, 2017, the Company had outstanding foreign currency option contracts known as zero-cost collars with an aggregate notional amount of $80.0 million , to hedge its exposure to fluctuations in the Mexican cash tax obligation due to changes in the value of the Mexican peso against the U.S. dollar. During January 2018, these contracts matured, resulting in cash received of $10.0 million . During January 2018, the Company entered into several zero-cost collar contracts with an aggregate notional amount of $340.0 million and maturity dates throughout 2018 and in January 2019. The zero-cost collar contracts have a weighted-average rate of Ps.19.23 to each U.S. dollar for the Mexican peso call options purchased by KCS and a weighted-average rate of Ps.21.45 to each U.S. dollar for the Mexican peso put options sold by KCS. The Company has not designated these foreign currency derivative instruments as hedging instruments for accounting purposes. The Company will measure the foreign currency derivative instruments at fair value each period and will recognize any change in fair value in foreign exchange gain (loss) within the consolidated statements of income. Common Stock Dividend On January 23, 2018 , the Company’s Board of Directors declared a cash dividend of $0.36 per share payable on April 4, 2018 , to common stockholders of record as of March 12, 2018 . The aggregate amount of the dividend declared was approximately $37.1 million .

Condensed Consolidating Financi

Condensed Consolidating Financial Information	12 Months Ended
	Dec. 31, 2017
Condensed Consolidating Financial Information [Abstract]
Condensed Consolidating Financial Information	Condensed Consolidating Financial Information Pursuant to Securities and Exchange Commission (“SEC”) Regulation S-X Rule 3-10 “Financial statements of guarantors and issuers of guaranteed securities registered or being registered”, the Company is required to provide condensed consolidating financial information for issuers of certain of its senior notes that are guaranteed. As of December 31, 2017 , KCS had outstanding $2,093.5 million senior notes due through 2045 . The senior notes are unsecured obligations of KCS, and are also jointly and severally and fully and unconditionally guaranteed on an unsecured senior basis by KCSR and certain wholly-owned domestic subsidiaries of KCS. As a result, the Company is providing the following condensed consolidating financial information (in millions) . Condensed Consolidating Statements of Comprehensive Income - KCS Notes 2017 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Revenues $ — $ 1,244.7 $ 1,359.0 $ (20.8 ) $ 2,582.9 Operating expenses 5.7 882.2 791.0 (17.6 ) 1,661.3 Operating income (loss) (5.7 ) 362.5 568.0 (3.2 ) 921.6 Equity in net earnings of affiliates 974.8 6.4 9.6 (979.3 ) 11.5 Interest expense (81.3 ) (72.2 ) (34.4 ) 87.7 (100.2 ) Debt retirement and exchange costs — — — — — Foreign exchange gain — — 41.7 — 41.7 Other income (expense), net 86.7 (0.6 ) 1.2 (87.6 ) (0.3 ) Income before income taxes 974.5 296.1 586.1 (982.4 ) 874.3 Income tax expense (benefit) 9.9 (353.1 ) 254.2 (0.6 ) (89.6 ) Net income 964.6 649.2 331.9 (981.8 ) 963.9 Less: Net income attributable to noncontrolling interest — — 1.9 — 1.9 Net income attributable to Kansas City Southern and subsidiaries 964.6 649.2 330.0 (981.8 ) 962.0 Other comprehensive income (loss) (6.7 ) — 0.5 (0.5 ) (6.7 ) Comprehensive income attributable to Kansas City Southern and subsidiaries $ 957.9 $ 649.2 $ 330.5 $ (982.3 ) $ 955.3 Condensed Consolidating Statements of Comprehensive Income - KCS Notes—(Continued) 2016 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Revenues $ — $ 1,101.3 $ 1,252.5 $ (19.6 ) $ 2,334.2 Operating expenses 4.7 794.7 734.0 (17.7 ) 1,515.7 Operating income (loss) (4.7 ) 306.6 518.5 (1.9 ) 818.5 Equity in net earnings of affiliates 468.5 5.3 12.7 (471.9 ) 14.6 Interest expense (81.9 ) (83.0 ) (63.1 ) 130.3 (97.7 ) Debt retirement and exchange costs — — — — — Foreign exchange loss — — (72.0 ) — (72.0 ) Other income (expense), net 104.4 (0.2 ) 24.1 (129.0 ) (0.7 ) Income before income taxes 486.3 228.7 420.2 (472.5 ) 662.7 Income tax expense 7.1 87.4 89.2 (0.9 ) 182.8 Net income 479.2 141.3 331.0 (471.6 ) 479.9 Less: Net income attributable to noncontrolling interest — — 1.8 — 1.8 Net income attributable to Kansas City Southern and subsidiaries 479.2 141.3 329.2 (471.6 ) 478.1 Other comprehensive loss (1.5 ) — (2.5 ) 2.5 (1.5 ) Comprehensive income attributable to Kansas City Southern and subsidiaries $ 477.7 $ 141.3 $ 326.7 $ (469.1 ) $ 476.6 2015 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Revenues $ — $ 1,135.9 $ 1,302.3 $ (19.4 ) $ 2,418.8 Operating expenses 4.6 779.7 849.3 (18.6 ) 1,615.0 Operating income (loss) (4.6 ) 356.2 453.0 (0.8 ) 803.8 Equity in net earnings of affiliates 464.0 5.6 16.5 (467.8 ) 18.3 Interest expense (4.6 ) (84.9 ) (40.1 ) 47.7 (81.9 ) Debt retirement and exchange costs 0.1 (5.2 ) (2.5 ) — (7.6 ) Foreign exchange loss — — (56.6 ) — (56.6 ) Other income (expense), net 45.9 (3.1 ) 1.4 (47.6 ) (3.4 ) Income before income taxes 500.8 268.6 371.7 (468.5 ) 672.6 Income tax expense 16.5 98.3 72.5 — 187.3 Net income 484.3 170.3 299.2 (468.5 ) 485.3 Less: Net income attributable to noncontrolling interest — — 1.8 — 1.8 Net income attributable to Kansas City Southern and subsidiaries 484.3 170.3 297.4 (468.5 ) 483.5 Other comprehensive loss (1.5 ) — (2.2 ) 2.2 (1.5 ) Comprehensive income attributable to Kansas City Southern and subsidiaries $ 482.8 $ 170.3 $ 295.2 $ (466.3 ) $ 482.0 Condensed Consolidating Balance Sheets - KCS Notes December 31, 2017 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Assets: Current assets $ 292.0 $ 222.9 $ 475.5 $ (310.3 ) $ 680.1 Investments — 3.9 40.7 — 44.6 Investments in consolidated subsidiaries 4,462.4 184.2 — (4,646.6 ) — Property and equipment (including concession assets), net — 4,454.8 3,954.9 (5.9 ) 8,403.8 Other assets 2,159.6 46.8 252.5 (2,388.7 ) 70.2 Total assets $ 6,914.0 $ 4,912.6 $ 4,723.6 $ (7,351.5 ) $ 9,198.7 Liabilities and equity: Current liabilities $ 277.9 $ 673.6 $ 332.0 $ (311.8 ) $ 971.7 Long-term debt 2,066.8 1,517.2 1,040.3 (2,388.8 ) 2,235.5 Deferred income taxes (7.1 ) 818.8 177.0 (1.5 ) 987.2 Other liabilities 13.5 70.3 55.1 — 138.9 Stockholders’ equity 4,562.9 1,832.7 2,802.7 (4,649.4 ) 4,548.9 Noncontrolling interest — — 316.5 — 316.5 Total liabilities and equity $ 6,914.0 $ 4,912.6 $ 4,723.6 $ (7,351.5 ) $ 9,198.7 December 31, 2016 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Assets: Current assets $ 18.3 $ 275.4 $ 389.6 $ (35.3 ) $ 648.0 Investments — 3.9 29.0 — 32.9 Investments in consolidated subsidiaries 3,497.7 179.1 — (3,676.8 ) — Property and equipment (including concession assets), net — 4,203.6 3,868.8 (2.7 ) 8,069.7 Other assets 2,767.9 43.0 252.6 (2,996.6 ) 66.9 Total assets $ 6,283.9 $ 4,705.0 $ 4,540.0 $ (6,711.4 ) $ 8,817.5 Liabilities and equity: Current liabilities $ 87.3 $ 432.8 $ 261.0 $ (36.7 ) $ 744.4 Long-term debt 2,064.3 1,928.9 1,274.9 (2,996.6 ) 2,271.5 Deferred income taxes 26.9 1,075.3 188.0 (0.9 ) 1,289.3 Other liabilities 4.0 86.3 17.5 — 107.8 Stockholders’ equity 4,101.4 1,181.7 2,484.0 (3,677.2 ) 4,089.9 Noncontrolling interest — — 314.6 — 314.6 Total liabilities and equity $ 6,283.9 $ 4,705.0 $ 4,540.0 $ (6,711.4 ) $ 8,817.5 Condensed Consolidating Statements of Cash Flows - KCS Notes 2017 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Operating activities: Net cash provided $ 220.4 $ 557.0 $ 266.9 $ (15.9 ) $ 1,028.4 Investing activities: Capital expenditures — (375.5 ) (209.9 ) — (585.4 ) Purchase or replacement of equipment under operating leases — (42.6 ) — — (42.6 ) Property investments in MSLLC — — (26.0 ) — (26.0 ) Investments in and advances to affiliates (0.6 ) (0.6 ) (20.4 ) 1.2 (20.4 ) Proceeds from repayment of loans to affiliates 12,241.7 — — (12,241.7 ) — Loans to affiliates (12,102.6 ) — — 12,102.6 — Proceeds from disposal of property — 6.0 2.8 — 8.8 Other investing activities — (17.2 ) (1.7 ) 3.4 (15.5 ) Net cash provided (used) 138.5 (429.9 ) (255.2 ) (134.5 ) (681.1 ) Financing activities: Proceeds from short-term borrowings 12,102.6 — — — 12,102.6 Repayment of short-term borrowings (11,943.6 ) — — — (11,943.6 ) Repayment of long-term debt — (3.6 ) (21.8 ) — (25.4 ) Dividends paid (142.5 ) — (12.5 ) 12.5 (142.5 ) Shares repurchased (375.6 ) — — — (375.6 ) Proceeds from loans from affiliates — 12,102.6 — (12,102.6 ) — Repayment of loans from affiliates — (12,241.7 ) — 12,241.7 — Contributions from affiliates — 0.6 0.6 (1.2 ) — Other financing activities 0.7 — — — 0.7 Net cash used (358.4 ) (142.1 ) (33.7 ) 150.4 (383.8 ) Cash and cash equivalents: Net increase (decrease) 0.5 (15.0 ) (22.0 ) — (36.5 ) At beginning of year 0.2 32.6 137.8 — 170.6 At end of year $ 0.7 $ 17.6 $ 115.8 $ — $ 134.1 Condensed Consolidating Statements of Cash Flows - KCS Notes—(Continued) 2016 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Operating activities: Net cash provided $ 434.1 $ 236.0 $ 482.7 $ (233.8 ) $ 919.0 Investing activities: Capital expenditures — (372.8 ) (190.8 ) — (563.6 ) Purchase or replacement of equipment under operating leases — (26.6 ) — — (26.6 ) Property investments in MSLLC — — (33.1 ) — (33.1 ) Investments in and advances to affiliates (153.4 ) (6.5 ) (0.9 ) 159.9 (0.9 ) Proceeds from repayment of loans to affiliates 9,067.7 — — (9,067.7 ) — Loans to affiliates (9,123.4 ) — — 9,123.4 — Proceeds from disposal of property — 2.0 3.1 (0.1 ) 5.0 Other investing activities — (14.9 ) 3.9 2.0 (9.0 ) Net cash used (209.1 ) (418.8 ) (217.8 ) 217.5 (628.2 ) Financing activities: Proceeds from short-term borrowings 8,698.7 243.5 — (243.5 ) 8,698.7 Repayment of short-term borrowings (8,597.9 ) (243.5 ) — 243.5 (8,597.9 ) Proceeds from issuance of long-term debt 248.7 — — — 248.7 Repayment of long-term debt (244.8 ) (3.5 ) (28.1 ) — (276.4 ) Dividends paid (142.8 ) — (230.2 ) 230.2 (142.8 ) Shares repurchased (185.4 ) — — — (185.4 ) Proceeds from loans from affiliates — 8,879.9 — (8,879.9 ) — Repayment of loans from affiliates — (8,824.2 ) — 8,824.2 — Contribution from affiliates — 153.1 6.8 (159.9 ) — Other financing activities (1.5 ) (0.1 ) (1.8 ) 1.7 (1.7 ) Net cash provided (used) (225.0 ) 205.2 (253.3 ) 16.3 (256.8 ) Cash and cash equivalents: Net increase — 22.4 11.6 — 34.0 At beginning of year 0.2 10.2 126.2 — 136.6 At end of year $ 0.2 $ 32.6 $ 137.8 $ — $ 170.6 Condensed Consolidating Statements of Cash Flows - KCS Notes—(Continued) 2015 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Operating activities: Net cash provided $ 45.2 $ 356.6 $ 526.0 $ (18.6 ) $ 909.2 Investing activities: Capital expenditures — (382.8 ) (305.2 ) — (688.0 ) Purchase or replacement of equipment under operating leases — (82.8 ) (61.4 ) — (144.2 ) Property investments in MSLLC — — (17.4 ) — (17.4 ) Investments in and advances to affiliates (0.7 ) (0.7 ) (0.7 ) 1.4 (0.7 ) Proceeds from repayment of loans to affiliates 293.9 — — (293.9 ) — Loans to affiliates (80.0 ) — — 80.0 — Proceeds from disposal of property — 1.3 3.6 (0.3 ) 4.6 Other investing activities (0.1 ) (32.0 ) 3.6 1.2 (27.3 ) Net cash provided (used) 213.1 (497.0 ) (377.5 ) (211.6 ) (873.0 ) Financing activities: Proceeds from short-term borrowings 80.0 10,786.2 — — 10,866.2 Repayment of short-term borrowings — (10,937.3 ) (300.0 ) — (11,237.3 ) Proceeds from issuance of long-term debt — 663.7 40.0 (80.0 ) 623.7 Repayment of long-term debt — (88.4 ) (61.4 ) — (149.8 ) Dividends paid (140.1 ) — (17.8 ) 17.8 (140.1 ) Shares repurchased (194.2 ) — — — (194.2 ) Repayment of loans from affiliates — (293.9 ) — 293.9 — Other financing activities (4.0 ) (9.2 ) (1.4 ) (1.5 ) (16.1 ) Net cash provided (used) (258.3 ) 121.1 (340.6 ) 230.2 (247.6 ) Cash and cash equivalents: Net decrease — (19.3 ) (192.1 ) — (211.4 ) At beginning of year 0.2 29.5 318.3 — 348.0 At end of year $ 0.2 $ 10.2 $ 126.2 $ — $ 136.6 As of December 31, 2017 , KCSR had outstanding $2.9 million principal amount of senior notes due through 2045. The senior notes are unsecured obligations of KCSR, and are also jointly and severally and fully and unconditionally guaranteed on an unsecured senior basis by KCS and certain wholly-owned domestic subsidiaries. As a result, the Company is providing the following condensed consolidating financial information (in millions) . Condensed Consolidating Statements of Comprehensive Income - KCSR Notes 2017 Parent KCSR Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Revenues $ — $ 1,220.8 $ 43.5 $ 1,359.0 $ (40.4 ) $ 2,582.9 Operating expenses 5.7 862.8 39.1 791.0 (37.3 ) 1,661.3 Operating income (loss) (5.7 ) 358.0 4.4 568.0 (3.1 ) 921.6 Equity in net earnings of affiliates 974.8 19.0 4.5 9.6 (996.4 ) 11.5 Interest expense (81.3 ) (72.2 ) — (34.4 ) 87.7 (100.2 ) Debt retirement and exchange costs — — — — — — Foreign exchange gain — — — 41.7 — 41.7 Other income (expense), net 86.7 (0.6 ) — 1.2 (87.6 ) (0.3 ) Income before income taxes 974.5 304.2 8.9 586.1 (999.4 ) 874.3 Income tax expense (benefit) 9.9 (310.6 ) (42.5 ) 254.2 (0.6 ) (89.6 ) Net income 964.6 614.8 51.4 331.9 (998.8 ) 963.9 Less: Net income attributable to noncontrolling interest — — — 1.9 — 1.9 Net income attributable to Kansas City Southern and subsidiaries 964.6 614.8 51.4 330.0 (998.8 ) 962.0 Other comprehensive income (loss) (6.7 ) — — 0.5 (0.5 ) (6.7 ) Comprehensive income attributable to Kansas City Southern and subsidiaries $ 957.9 $ 614.8 $ 51.4 $ 330.5 $ (999.3 ) $ 955.3 Condensed Consolidating Statements of Comprehensive Income - KCSR Notes—(Continued) 2016 Parent KCSR Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Revenues $ — $ 1,077.3 $ 43.7 $ 1,252.5 $ (39.3 ) $ 2,334.2 Operating expenses 4.7 776.3 38.1 734.0 (37.4 ) 1,515.7 Operating income (loss) (4.7 ) 301.0 5.6 518.5 (1.9 ) 818.5 Equity in net earnings (losses) of affiliates 468.5 (0.2 ) 3.5 12.7 (469.9 ) 14.6 Interest expense (81.9 ) (83.0 ) — (63.1 ) 130.3 (97.7 ) Debt retirement and exchange costs — — — — — — Foreign exchange loss — — — (72.0 ) — (72.0 ) Other income (expense), net 104.4 (0.2 ) — 24.1 (129.0 ) (0.7 ) Income before income taxes 486.3 217.6 9.1 420.2 (470.5 ) 662.7 Income tax expense 7.1 84.3 3.1 89.2 (0.9 ) 182.8 Net income 479.2 133.3 6.0 331.0 (469.6 ) 479.9 Less: Net income attributable to noncontrolling interest — — — 1.8 — 1.8 Net income attributable to Kansas City Southern and subsidiaries 479.2 133.3 6.0 329.2 (469.6 ) 478.1 Other comprehensive loss (1.5 ) — — (2.5 ) 2.5 (1.5 ) Comprehensive income attributable to Kansas City Southern and subsidiaries $ 477.7 $ 133.3 $ 6.0 $ 326.7 $ (467.1 ) $ 476.6 Condensed Consolidating Statements of Comprehensive Income - KCSR Notes—(Continued) 2015 Parent KCSR Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Revenues $ — $ 1,112.5 $ 42.1 $ 1,302.3 $ (38.1 ) $ 2,418.8 Operating expenses 4.6 760.4 38.0 849.3 (37.3 ) 1,615.0 Operating income (loss) (4.6 ) 352.1 4.1 453.0 (0.8 ) 803.8 Equity in net earnings (losses) of affiliates 464.0 (1.4 ) 3.7 16.5 (464.5 ) 18.3 Interest expense (4.6 ) (84.8 ) (0.1 ) (40.1 ) 47.7 (81.9 ) Debt retirement and exchange costs 0.1 (5.2 ) — (2.5 ) — (7.6 ) Foreign exchange loss — — — (56.6 ) — (56.6 ) Other income (expense), net 45.9 (3.2 ) 0.1 1.4 (47.6 ) (3.4 ) Income before income taxes 500.8 257.5 7.8 371.7 (465.2 ) 672.6 Income tax expense 16.5 95.2 3.1 72.5 — 187.3 Net income 484.3 162.3 4.7 299.2 (465.2 ) 485.3 Less: Net income attributable to noncontrolling interest — — — 1.8 — 1.8 Net income attributable to Kansas City Southern and subsidiaries 484.3 162.3 4.7 297.4 (465.2 ) 483.5 Other comprehensive loss (1.5 ) — — (2.2 ) 2.2 (1.5 ) Comprehensive income attributable to Kansas City Southern and subsidiaries $ 482.8 $ 162.3 $ 4.7 $ 295.2 $ (463.0 ) $ 482.0 Condensed Consolidating Balance Sheets - KCSR Notes December 31, 2017 Parent KCSR Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Assets: Current assets $ 292.0 $ 214.1 $ 8.8 $ 475.5 $ (310.3 ) $ 680.1 Investments — 3.9 — 40.7 — 44.6 Investments in consolidated subsidiaries 4,462.4 7.4 182.2 — (4,652.0 ) — Property and equipment (including concession assets), net — 4,283.2 171.6 3,954.9 (5.9 ) 8,403.8 Other assets 2,159.6 46.8 — 252.5 (2,388.7 ) 70.2 Total assets $ 6,914.0 $ 4,555.4 $ 362.6 $ 4,723.6 $ (7,356.9 ) $ 9,198.7 Liabilities and equity: Current liabilities $ 277.9 $ 578.7 $ 94.9 $ 332.0 $ (311.8 ) $ 971.7 Long-term debt 2,066.8 1,517.2 — 1,040.3 (2,388.8 ) 2,235.5 Deferred income taxes (7.1 ) 734.8 84.0 177.0 (1.5 ) 987.2 Other liabilities 13.5 70.0 0.3 55.1 — 138.9 Stockholders’ equity 4,562.9 1,654.7 183.4 2,802.7 (4,654.8 ) 4,548.9 Noncontrolling interest — — — 316.5 — 316.5 Total liabilities and equity $ 6,914.0 $ 4,555.4 $ 362.6 $ 4,723.6 $ (7,356.9 ) $ 9,198.7 December 31, 2016 Parent KCSR Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Assets: Current assets $ 18.3 $ 271.8 $ 4.6 $ 389.6 $ (36.3 ) $ 648.0 Investments — 3.9 — 29.0 — 32.9 Investments in consolidated subsidiaries 3,497.7 (9.8 ) 177.1 — (3,665.0 ) — Property and equipment (including concession assets), net — 4,024.5 179.1 3,868.8 (2.7 ) 8,069.7 Other assets 2,767.9 43.0 — 252.6 (2,996.6 ) 66.9 Total assets $ 6,283.9 $ 4,333.4 $ 360.8 $ 4,540.0 $ (6,700.6 ) $ 8,817.5 Liabilities and equity: Current liabilities $ 87.3 $ 342.1 $ 91.7 $ 261.0 $ (37.7 ) $ 744.4 Long-term debt 2,064.3 1,928.8 0.1 1,274.9 (2,996.6 ) 2,271.5 Deferred income taxes 26.9 937.7 137.6 188.0 (0.9 ) 1,289.3 Other liabilities 4.0 86.2 0.1 17.5 — 107.8 Stockholders’ equity 4,101.4 1,038.6 131.3 2,484.0 (3,665.4 ) 4,089.9 Noncontrolling interest — — — 314.6 — 314.6 Total liabilities and equity $ 6,283.9 $ 4,333.4 $ 360.8 $ 4,540.0 $ (6,700.6 ) $ 8,817.5 Condensed Consolidating Statements of Cash Flows - KCSR Notes 2017 Parent KCSR Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Operating activities: Net cash provided $ 220.4 $ 556.6 $ 0.4 $ 266.9 $ (15.9 ) $ 1,028.4 Investing activities: Capital expenditures — (375.2 ) (0.3 ) (209.9 ) — (585.4 ) Purchase or replacement of equipment under operating leases — (42.6 ) — — — (42.6 ) Property investments in MSLLC — — — (26.0 ) — (26.0 ) Investments in and advances to affiliates (0.6 ) — (0.6 ) (20.4 ) 1.2 (20.4 ) Proceeds from repayment of loans to affiliates 12,241.7 — — — (12,241.7 ) — Loans to affiliates (12,102.6 ) — — — 12,102.6 — Proceeds from disposal of property — 6.0 — 2.8 — 8.8 Other investing activities — (17.2 ) — (1.7 ) 3.4 (15.5 ) Net cash provided (used) 138.5 (429.0 ) (0.9 ) (255.2 ) (134.5 ) (681.1 ) Financing activities: Proceeds from short-term borrowings 12,102.6 — — — — 12,102.6 Repayment of short-term borrowings (11,943.6 ) — — — — (11,943.6 ) Repayment of long-term debt — (3.5 ) (0.1 ) (21.8 ) — (25.4 ) Dividends paid (142.5 ) — — (12.5 ) 12.5 (142.5 ) Shares repurchased (375.6 ) — — — — (375.6 ) Proceeds from loans from affiliates — 12,102.6 — — (12,102.6 ) — Repayment of loans from affiliates — (12,241.7 ) — — 12,241.7 — Contributions from affiliates — — 0.6 0.6 (1.2 ) — Other financing activities 0.7 — — — — 0.7 Net cash provided (used) (358.4 ) (142.6 ) 0.5 (33.7 ) 150.4 (383.8 ) Cash and cash equivalents: Net increase (decrease) 0.5 (15.0 ) — (22.0 ) — (36.5 ) At beginning of year 0.2 32.6 — 137.8 — 170.6 At end of year $ 0.7 $ 17.6 $ — $ 115.8 $ — $ 134.1 Condensed Consolidating Statements of Cash Flows - KCSR Notes—(Continued) 2016 Parent KCSR Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Operating activities: Net cash provided $ 434.1 $ 235.4 $ 0.6 $ 482.7 $ (233.8 ) $ 919.0 Investing activities: Capital expenditures — (372.2 ) (0.6 ) (190.8 ) — (563.6 ) Purchase or replacement of equipment under operating leases — (26.6 ) — — — (26.6 ) Property investments in MSLLC — — — (33.1 ) — (33.1 ) Investments in and advances to affiliates (153.4 ) — (6.5 ) (0.9 ) 159.9 (0.9 ) Proceeds from repayment of loans to affiliates 9,067.7 — — — (9,067.7 ) — Loans to affiliates (9,123.4 ) — — — 9,123.4 — Proceeds from disposal of property — 2.0 — 3.1 (0.1 ) 5.0 Other investing activities — (14.9 ) — 3.9 2.0 (9.0 ) Net cash used (209.1 ) (411.7 ) (7.1 ) (217.8 ) 217.5 (628.2 ) Financing activities: Proceeds from short-term borrowings 8,698.7 243.5 — — (243.5 ) 8,698.7 Repayment of short-term borrowings (8,597.9 ) (243.5 ) — — 243.5 (8,597.9 ) Proceeds from issuance of long-term debt 248.7 — — — — 248.7 Repayment of long-term debt (244.8 ) (3.4 ) (0.1 ) (28.1 ) — (276.4 ) Dividends paid (142.8 ) — — (230.2 ) 230.2 (142.8 ) Shares repurchased (185.4 ) — — — — (185.4 ) Proceeds from loans from affiliates — 8,879.9 — — (8,879.9 ) — Repayment of loans from affiliates — (8,824.2 ) — — 8,824.2 — Contribution from affiliates — 146.6 6.5 6.8 (159.9 ) — Other financing activities (1.5 ) (0.1 ) — (1.8 ) 1.7 (1.7 ) Net cash provided (used) (225.0 ) 198.8 6.4 (253.3 ) 16.3 (256.8 ) Cash and cash equivalents: Net increase (decrease) — 22.5 (0.1 ) 11.6 — 34.0 At beginning of year 0.2 10.1 0.1 126.2 — 136.6 At end of year $ 0.2 $ 32.6 $ — $ 137.8 $ — $ 170.6 Condensed Consolidating Statements of Cash Flows - KCSR Notes—(Continued) 2015 Parent KCSR Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Operating activities: Net cash provided $ 45.2 $ 355.6 $ 1.0 $ 526.0 $ (18.6 ) $ 909.2 Investing activities: Capital expenditures — (381.5 ) (1.3 ) (305.2 ) — (688.0 ) Purchase or replacement of equipment under operating leases — (82.8 ) — (61.4 ) — (144.2 ) Property investments in MSLLC — — — (17.4 ) — (17.4 ) Investments in and advances to affiliates (0.7 ) — (0.7 ) (0.7 ) 1.4 (0.7 ) Proceeds from repayment of loans to affiliates 293.9 — — — (293.9 ) — Loans to affiliates (80.0 ) — — — 80.0 — Proceeds from disposal of property — 1.3 — 3.6 (0.3 ) 4.6 Other investing activities (0.1 ) (32.0 ) — 3.6 1.2 (27.3 ) Net cash provided (used) 213.1 (495.0 ) (2.0 ) (377.5 ) (211.6 ) (873.0 ) Financing activities: Proceeds from short-term borrowings 80.0 10,786.2 — — — 10,866.2 Repayment of short-term borrowings — (10,937.3 ) — (300.0 ) — (11,237.3 ) Proceeds from issuance of long-term debt — 663.7 — 40.0 (80.0 ) 623.7 Repayment of long-term debt — (88.3 ) (0.1 ) (61.4 ) — (149.8 ) Dividends paid (140.1 ) — — (17.8 ) 17.8 (140.1 ) Shares repurchased (194.2 ) — — — — (194.2 ) Repayment of loans from affiliates — (293.9 ) — — 293.9 — Other financing activities (4.0 ) (9.9 ) 0.7 (1.4 ) (1.5 ) (16.1 ) Net cash provided (used) (258.3 ) 120.5 0.6 (340.6 ) 230.2 (247.6 ) Cash and cash equivalents: Net decrease — (18.9 ) (0.4 ) (192.1 ) — (211.4 ) At beginning of year 0.2 29.0 0.5 318.3 — 348.0 At end of year $ 0.2 $ 10.1 $ 0.1 $ 126.2 $ — $ 136.6

Significant Accounting Polici29

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Principles of Consolidation Policy	Principles of Consolidation. The accompanying consolidated financial statements are presented using the accrual basis of accounting and include the Company and its majority-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated. Certain prior year amounts have been reclassified to conform to the current year presentation. The equity method of accounting is used for all entities in which the Company or its subsidiaries have significant influence, but not a controlling interest. The Company evaluates less-than-majority-owned investments for consolidation pursuant to consolidation and variable interest entity guidance. The Company does not have any less-than-majority-owned investments requiring consolidation. During the first quarter of 2017, the Company adopted Accounting Standards Update (“ASU”) No. 2016-09, Improvements to Employee Share-Based Payment Accounting . The Company now recognizes forfeitures as they occur rather than estimating a forfeiture rate for the year. Excess tax benefits or deficiencies resulting from the exercise or vesting of awards are included in income tax expense in the reporting period in which they occur. Upon adoption, the Company recognized a cumulative-effect adjustment to equity at the beginning of 2017. During the third quarter of 2017, the Company early adopted ASU No. 2017-12, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities. The Company now asserts qualitatively, on a quarterly basis, that the hedging relationship was and continues to be highly effective as long as facts and circumstances related to the hedging relationship have not changed. If facts and circumstances have changed, the Company will perform a quantitative assessment to ensure the hedging relationship is still deemed highly effective. In addition, the ineffective portion of an effective hedge is no longer measured periodically and included in the income statement; rather, the total periodic change in fair value of an effective hedge is included in accumulated other comprehensive income on the balance sheet, until settlement occurs. The adoption of the new guidance had no impact on the Company’s consolidated financial statements as there was no ineffectiveness recognized on the Company’s cash flow hedges prior to adoption.
Use of Estimates Policy	Use of Estimates. The accounting and financial reporting policies of the Company conform to accounting principles generally accepted in the United States of America (“U.S. GAAP”). The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Significant items subject to such estimates and assumptions include those related to the recoverability and useful lives of assets, litigation provisions, and income taxes. Changes in facts and circumstances may result in revised estimates and actual results could differ from those estimates.
Revenue Recognition Policy	Revenue Recognition. Freight revenue is recognized proportionally as a shipment moves from origin to destination, with the related expense recognized as incurred. Other revenues, in general, are recognized when the product is shipped, as services are performed or contractual obligations are fulfilled.
Foreign Exchange Gain (Loss) Policy	Foreign Exchange Gain (Loss). For financial reporting purposes, foreign subsidiaries maintain records in U.S. dollars, which is the functional currency. The dollar is the currency that reflects the economic substance of the underlying events and circumstances relevant to the entity. Monetary assets and liabilities denominated in pesos are remeasured into dollars using current exchange rates. The difference between the exchange rate on the date of the transaction and the exchange rate on the settlement date, or balance sheet date if not settled, is included in the income statement as foreign exchange gain or loss.
Cash Equivalents Policy	Cash Equivalents. Short-term liquid investments with an initial maturity of three months or less are classified as cash and cash equivalents.
Accounts Receivable, net Policy	Accounts Receivable, net. Accounts receivable are net of an allowance for uncollectible accounts as determined by historical experience and adjusted for economic uncertainties or known trends. Accounts are charged to the allowance when a customer enters bankruptcy, when an account has been transferred to a collection agent or submitted for legal action, or when a customer is significantly past due and all available means of collection have been exhausted.
Materials and Supplies Policy	Materials and Supplies. Materials and supplies consisting of diesel fuel, items to be used in the maintenance of rolling stock and items to be used in the maintenance or construction of road property are valued at the lower of average cost or net realizable value.
Derivative Instruments Policy	Derivative Instruments. Derivatives are measured at fair value and recorded on the balance sheet as either assets or liabilities. Changes in the fair value of derivatives are recorded either through current earnings or as other comprehensive income, depending on hedge designation. Gains and losses on derivative instruments classified as cash flow hedges are reported in other comprehensive income and are reclassified into earnings in the periods in which earnings are impacted by the variability of the cash flow of the hedged item.
Property and Equipment (including Concession Assets) Policy	Property and Equipment (including Concession Assets). KCS capitalizes costs for self-constructed additions and improvements to property including direct labor and material, indirect overhead costs, and interest during long-term construction projects. For purchased assets, all costs necessary to make the asset ready for its intended use are capitalized. Expenditures that significantly increase asset values, productive capacity, efficiency, safety or extend useful lives are capitalized. Repair and maintenance costs are expensed as incurred. Property and equipment are carried at cost and are depreciated primarily on the group method of depreciation, which the Company believes closely approximates a straight line basis over the estimated useful lives of the assets measured in years. The group method of depreciation applies a composite rate to classes of similar assets rather than to individual assets. Composite depreciation rates are based upon the Company’s estimates of the expected average useful lives of assets as well as expected net salvage value at the end of their useful lives. In developing these estimates, the Company utilizes periodic depreciation studies performed by an independent engineering firm. Depreciation rate studies are performed at least every three years for equipment and at least every six years for road property (rail, ties, ballast, etc.). The Company completed depreciation studies for KCSM in 2016 and KCSR in 2015. The impacts of the studies were immaterial to the consolidated financial results for all periods. Under the group method of depreciation, the cost of railroad property and equipment (net of salvage or sales proceeds) retired or replaced in the normal course of business is charged to accumulated depreciation with no gain or loss recognized. Gains or losses on dispositions of land or non-group property and abnormal retirements of railroad property are recognized through income. A retirement of railroad property would be considered abnormal if the cause of the retirement is unusual in nature and its actual life is significantly shorter than what would be expected for that group based on the depreciation studies. An abnormal retirement could cause the Company to re-evaluate the estimated useful life of the impacted asset class. Costs incurred by the Company to acquire the concession rights and related assets, as well as subsequent improvements to the concession assets, are capitalized and amortized using the group method of depreciation over the lesser of the current expected Concession term, including probable renewal of an additional 50-year term, or the estimated useful lives of the assets and rights. Long-lived assets are reviewed for impairment when events or circumstances indicate that the carrying amount of an asset may not be recoverable. If impairment indicators are present and the estimated future undiscounted cash flows are less than the carrying value of the long-lived assets, the carrying value would be reduced to the estimated fair value. Future cash flow estimates for an impairment review would be based on the lowest level of identifiable cash flows, which are the Company’s U.S. and Mexican operations.
Goodwill Policy	Goodwill. Goodwill represents the excess of the purchase price over the fair value of the net identifiable assets acquired in business combinations. As of December 31, 2017 and 2016 , the goodwill balance was $13.2 million , which is included in other assets in the consolidated balance sheets. Goodwill is not amortized, but is reviewed at least annually, or more frequently as indicators warrant, for impairment. An impairment loss would be recognized to the extent that the carrying amount exceeds the assets’ fair values.
Fair Value of Financial Instruments Policy	Fair Value of Financial Instruments. Non-financial assets and liabilities are recognized at fair value on a nonrecurring basis. These assets and liabilities are measured at fair value on an ongoing basis but are subject to recognition in the financial statements only in certain circumstances. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Company determines the fair values of its financial instruments based on the fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The hierarchy is broken down into three levels based upon the observability of inputs. Fair values determined by Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access. Level 2 inputs include quoted prices for similar assets and liabilities in active markets, and inputs other than quoted prices that are observable for the asset or liability. Level 3 inputs are unobservable inputs for the asset or liability, and include situations where there is little, if any, market activity for the asset or liability. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, the level in the fair value hierarchy within which the fair value measurement in its entirety falls has been determined based on the lowest level input that is significant to the fair value measurement in its entirety. The Company’s assessment of the significance of a particular input to the fair value in its entirety requires judgment and considers factors specific to the asset or liability.
Environmental Liabilities Policy	Environmental Liabilities. The Company recognizes liabilities for remediation and restoration costs related to past activities when the Company’s obligation is probable and the costs can be reasonably estimated. Costs of future expenditures for environmental remediation are not discounted to their present value. Recoveries of environmental remediation costs from other parties are recorded as assets when their receipt is deemed probable. Costs of ongoing compliance activities related to current operations are expensed as incurred.
Personal Injury Claims Policy	Personal Injury Claims. Personal injury claims in excess of self-insurance levels are insured up to certain coverage amounts, depending on the type of claim and year of occurrence. The Company’s personal injury liability is based on actuarial studies performed on an undiscounted basis by an independent third party actuarial firm and reviewed by management. The liability is based on claims filed and an estimate of claims incurred but not yet reported. Adjustments to the liability are reflected as operating expenses in the period in which the adjustments are known. Legal fees related to personal injury claims are recognized in operating expense in the period incurred.
Health and Welfare and Postemployment Benefits Policy	Health and Welfare and Postemployment Benefits. The Company provides certain medical, life and other postemployment benefits to certain active employees and retirees. The Company uses actuaries to assist management in measuring the benefit obligation and cost based on the current plan provisions, employee demographics, and assumptions about financial and demographic factors affecting the probability, timing and amount of expected future benefit payments. Significant assumptions include the discount rate, rate of increase in compensation levels, and the health care cost trend rate. Actuarial gains and losses determined at the measurement date (December 31) are recognized immediately in the consolidated statements of income.
Share-Based Compensation Policy	Share-Based Compensation. The Company accounts for all share-based compensation in accordance with fair value recognition provisions. Under this method, compensation expense is measured at grant date fair value and is recognized over the requisite service period in which the award is earned. The Company issues treasury stock to settle share-based awards.
Income Taxes Policy	Income Taxes. Deferred income tax effects of transactions reported in different periods for financial reporting and income tax return purposes are recognized under the asset and liability method of accounting for income taxes. This method gives consideration to the future tax consequences of the deferred income tax items and immediately recognizes changes in income tax laws in the year of enactment. On December 22, 2017, the President of the United States signed into law the Tax Cuts and Jobs Act (the “Tax Reform Act”). Further information on the tax impacts of the Tax Reform Act is included in Note 12 of the Company’s consolidated financial statements. The Company has recognized a deferred tax asset, net of a valuation allowance, for net operating loss carryovers. The Company projects sufficient future taxable income to realize the deferred tax asset recorded less the valuation allowance. These projections take into consideration assumptions about future income, future capital expenditures and inflation rates. If assumptions or actual conditions change, the deferred tax asset, net of the valuation allowance, will be adjusted to properly reflect the expected tax benefit.
Treasury Stock Policy	Treasury Stock. The excess of repurchase price over par value of common shares held in treasury is allocated between additional paid-in capital and retained earnings.
New Accounting Pronouncements	New Accounting Pronouncements In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers , which requires companies to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration it expects to be entitled in exchange for those goods or services. The new standard will become effective for the Company beginning with the first quarter 2018 and the Company plans to adopt the accounting standard using the modified retrospective transition approach. The modified retrospective transition approach will recognize any changes from the beginning of the year of initial application through retained earnings with no restatement of comparative periods. The Company has completed a review of the impacts of the application of the new standard to its existing portfolio of customer contracts. Under the new standard, the Company will continue to recognize freight revenue proportionally as a shipment moves from origin to destination. Furthermore, the Company will be required to assess variable consideration included in its contracts and make judgments and estimates throughout the applicable periods. Certain additional financial statement disclosure requirements are mandated by the new standard including disclosure of contract assets and contract liabilities as well as a disaggregated view of revenue. Based on the Company’s review, the adoption of this guidance will not have a significant impact on the Company’s consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases , which requires lessees to recognize for all leases a right-to-use asset and a lease obligation in the consolidated balance sheet. Expenses are recognized in the consolidated statement of income in a manner similar to current accounting guidance. Lessees are permitted to make an accounting policy election to not recognize an asset and liability for leases with a term of twelve months or less. Lessor accounting under the new standard is substantially unchanged. Additional qualitative and quantitative disclosures, including significant judgments made by management, will be required. The new standard will become effective for the Company beginning with the first quarter 2019 and requires a modified retrospective transition approach. The Company created a cross functional team to assess the contractual arrangements that may qualify as a lease under the new standard and implement a lease management system. At December 31, 2017, KCS disclosed approximately $281.7 million of operating leases in the leases and debt maturities table within Note 11 - Long-Term Debt and will evaluate those contracts as well as other existing arrangements to determine if they qualify for lease accounting under the new standard. The Company is continuing to evaluate the impacts the adoption of this accounting guidance will have on the consolidated financial statements.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Reconciliation of Basic Earnings Per Share Computation to the Diluted Earnings Per Share Computation	The following table reconciles the basic earnings per share computation to the diluted earnings per share computation (in millions, except share and per share amounts) : 2017 2016 2015 Net income available to common stockholders for purposes of computing basic and diluted earnings per share $ 961.8 $ 477.9 $ 483.3 Weighted-average number of shares outstanding (in thousands) : Basic shares 104,728 107,560 109,709 Effect of dilution 312 201 206 Diluted shares 105,040 107,761 109,915 Earnings per share: Basic earnings per share $ 9.18 $ 4.44 $ 4.41 Diluted earnings per share $ 9.16 $ 4.43 $ 4.40
Schedule of Potentially Dilutive Shares Excluded from the Calculation	Potentially dilutive shares excluded from the calculation ( in thousands ): 2017 2016 2015 Stock options excluded as their inclusion would be anti-dilutive 150 185 84

Property and Equipment (inclu31

Property and Equipment (including Concession Assets) (Tables)	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Property Plant and Equipment by Type	The following tables list the major categories of property and equipment, including concession assets, as well as the weighted-average composite depreciation rate for each category ( in millions ): As of December 31, 2017 Cost Accumulated Depreciation Net Book Value Depreciation Rates for 2017 Land $ 218.6 $ — $ 218.6 N/A Concession land rights 141.2 (26.5 ) 114.7 1.0 % Rail and other track material 1,967.0 (425.9 ) 1,541.1 2.7-3.0% Ties 1,779.6 (441.0 ) 1,338.6 2.0-4.8% Grading 969.9 (162.1 ) 807.8 0.9 % Bridges and tunnels 775.0 (144.9 ) 630.1 1.1 % Ballast 795.2 (222.0 ) 573.2 2.3-4.2% Other (a) 1,270.4 (363.3 ) 907.1 3.2 % Total road property 7,557.1 (1,759.2 ) 5,797.9 2.8 % Locomotives 1,527.9 (375.2 ) 1,152.7 4.7 % Freight cars 937.9 (168.9 ) 769.0 2.7 % Other equipment 69.1 (26.6 ) 42.5 5.9 % Total equipment 2,534.9 (570.7 ) 1,964.2 4.0 % Technology and other 229.1 (144.4 ) 84.7 17.1 % Construction in progress 223.7 — 223.7 N/A Total property and equipment (including concession assets) $ 10,904.6 $ (2,500.8 ) $ 8,403.8 N/A _____________ (a) Other includes signals, buildings and other road assets. As of December 31, 2016 Cost Accumulated Depreciation Net Book Value Depreciation Rates for 2016 Land $ 219.2 $ — $ 219.2 N/A Concession land rights 141.2 (25.1 ) 116.1 1.0 % Rail and other track material 1,925.4 (445.0 ) 1,480.4 1.6-3.2% Ties 1,710.1 (423.8 ) 1,286.3 2.0-5.0% Grading 910.7 (153.9 ) 756.8 0.9 % Bridges and tunnels 739.4 (137.6 ) 601.8 1.1 % Ballast 748.3 (215.1 ) 533.2 2.5-4.7% Other (a) 1,152.1 (332.4 ) 819.7 3.0 % Total road property 7,186.0 (1,707.8 ) 5,478.2 2.8 % Locomotives 1,485.9 (356.9 ) 1,129.0 4.5 % Freight cars 887.7 (152.5 ) 735.2 3.5 % Other equipment 66.2 (23.6 ) 42.6 6.4 % Total equipment 2,439.8 (533.0 ) 1,906.8 4.2 % Technology and other 182.2 (126.2 ) 56.0 17.4 % Construction in progress 293.4 — 293.4 N/A Total property and equipment (including concession assets) $ 10,461.8 $ (2,392.1 ) $ 8,069.7 N/A _____________ (a) Other includes signals, buildings and other road assets.

Other Balance Sheet Captions (T

Other Balance Sheet Captions (Tables)	12 Months Ended
	Dec. 31, 2017
Other Balance Sheet Captions [Abstract]
Schedule of Other Current Assets	Other current assets included the following items at December 31 (in millions): 2017 2016 Refundable taxes $ 81.6 $ 64.0 Mexican fuel excise tax credit 35.1 49.2 Prepaid expenses 18.3 18.2 Other 22.4 2.4 Other current assets $ 157.4 $ 133.8
Schedule of Accounts Payable and Accrued Liabilities	Accounts payable and accrued liabilities included the following items at December 31 (in millions): 2017 2016 Accounts payable $ 225.1 $ 247.8 Income and other taxes 111.8 36.0 Accrued wages and vacation 89.0 78.7 Derailments, personal injury and other claim provisions 48.0 39.2 Foreign currency derivative instruments — 41.1 Dividends payable 37.2 35.2 Other 76.7 59.7 Accounts payable and accrued liabilities $ 587.8 $ 537.7

Derivative Instruments (Tables)

Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Foreign Currency Derivative Instruments	Below is a summary of the Company’s 2017, 2016 and 2015 foreign currency derivative contracts (amounts in millions, except Ps./USD) : Foreign currency forward contracts Contracts to purchase Ps./pay USD Offsetting contracts to sell Ps./receive USD Notional amount Notional amount Weighted-average exchange rate (in Ps./USD) Maturity date Notional amount Notional amount Weighted-average exchange rate (in Ps./USD) Maturity date Cash received/(paid) on settlement Contracts executed in 2016 and settled in 2017 $ 340.0 Ps. 6,207.7 Ps. 18.3 1/17/2017 $ 287.0 Ps. 6,207.7 Ps. 21.6 1/17/2017 $ (53.0 ) Contracts executed in 2016 and settled in 2016 $ 60.0 Ps. 1,057.3 Ps. 17.6 4/29/2016 $ 60.7 Ps. 1,057.3 Ps. 17.4 4/29/2016 $ 0.7 Contracts executed in 2015 and settled in 2016 $ 300.0 Ps. 4,480.4 Ps. 14.9 1/15/2016 $ 251.0 Ps. 4,480.4 Ps. 17.9 1/15/2016 $ (49.0 ) Contracts executed in 2014 and settled in 2015 $ 300.0 Ps. 4,364.7 Ps. 14.6 1/15/2015 $ 298.8 Ps. 4,364.7 Ps. 14.6 1/15/2015 $ (1.2 ) Foreign currency zero-cost collar contracts Notional amount Maturity date Weighted-average call rate outstanding options (in Ps./USD) Weighted-average put rate outstanding options (in Ps./USD) Cash received/(paid) on settlement Contracts executed in 2017 and outstanding at December 31, 2017 $ 80.0 1/16/2018 Ps. 21.7 Ps. 24.8 — Contracts executed in 2017 and settled in 2017 $ 450.0 — — — $ 42.2 Contracts executed in 2015 and settled in 2016 $ 80.0 — — — $ (10.1 ) Contracts executed in 2015 and settled in 2015 $ 50.0 — — — $ (4.3 )
Schedule of Derivative Instruments in Consolidated Balance Sheets, Fair Value	The following table presents the fair value of derivative instruments included in the consolidated balance sheets at December 31 (in millions) : Derivative Assets Balance Sheet Location 2017 2016 Derivatives not designated as hedging instruments: Foreign currency zero-cost collar contracts Other current assets $ 7.9 $ — Total derivatives not designated as hedging instruments 7.9 — Total derivative assets $ 7.9 $ — Derivative Liabilities Balance Sheet Location 2017 2016 Derivatives designated as hedging instruments: Treasury lock agreements Other noncurrent liabilities and deferred credits $ 5.6 $ — Total derivatives designated as hedging instruments 5.6 — Derivatives not designated as hedging instruments: Foreign currency forward contracts Accounts payable and accrued liabilities — 41.1 Total derivatives not designated as hedging instruments — 41.1 Total derivative liabilities $ 5.6 $ 41.1
Schedule of Derivative Instruments, Gain (Loss) in Consolidated Statements of Income and Consolidated Statements of Comprehensive Income	The following table presents the effects of derivative instruments on the consolidated statements of income and consolidated statements of comprehensive income for the years ended December 31 (in millions) : Derivatives in Cash Flow Hedging Relationships Amount of Gain/(Loss) Recognized in OCI on Derivative 2017 2016 2015 Treasury lock agreements $ (5.6 ) $ — $ — Total $ (5.6 ) $ — $ — Derivatives Not Designated as Hedging Instruments Location of Gain/(Loss) Recognized in Income on Derivative Amount of Gain/(Loss) Recognized in Income on Derivative 2017 2016 2015 Foreign currency forward contracts Foreign exchange gain (loss) $ (11.9 ) $ (49.6 ) $ (36.7 ) Foreign currency zero-cost collar contracts Foreign exchange gain (loss) 50.1 (3.9 ) (10.5 ) Total $ 38.2 $ (53.5 ) $ (47.2 )

Long-Term Debt (Tables)

Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Schedule of Long-Term Debt Instruments	Long-term debt at December 31 (in millions): 2017 2016 Principal Unamortized Discount and Debt Issuance Costs Net Principal Unamortized Discount and Debt Issuance Costs Net Revolving credit facilities, variable interest rate, due 2020 $ — $ — $ — $ — $ — $ — KCS 2.35% senior notes, due 2020 257.3 1.2 256.1 257.3 1.7 255.6 KCS 3.00% senior notes, due 2023 439.1 4.0 435.1 439.1 4.7 434.4 KCS 3.85% senior notes, due 2023 199.2 1.7 197.5 199.2 2.0 197.2 KCS 3.125% senior notes, due 2026 250.0 3.1 246.9 250.0 3.4 246.6 KCS 4.30% senior notes, due 2043 448.7 9.3 439.4 448.7 9.6 439.1 KCS 4.95% senior notes, due 2045 499.2 7.6 491.6 499.2 8.0 491.2 KCSR senior notes 3.85% to 4.95%, due through 2045 2.9 — 2.9 2.9 — 2.9 KCSM senior notes 2.35% to 3.00%, due through 2023 28.5 0.2 28.3 28.5 0.2 28.3 RRIF loans 2.96% to 4.29%, due serially through 2037 77.8 0.5 77.3 81.4 0.5 80.9 Financing agreements 5.737% to 9.310%, due serially through 2023 84.2 0.3 83.9 102.5 0.4 102.1 Capital lease obligations, due serially to 2024 15.0 — 15.0 18.3 — 18.3 Other debt obligations 0.3 — 0.3 0.3 — 0.3 Total 2,302.2 27.9 2,274.3 2,327.4 30.5 2,296.9 Less: Debt due within one year 38.8 — 38.8 25.4 — 25.4 Long-term debt $ 2,263.4 $ 27.9 $ 2,235.5 $ 2,302.0 $ 30.5 $ 2,271.5
Schedule Of Future Minimum Payments For Long-Term Debt, Capital And Operating Leases	Minimum annual payments and present value thereof under existing capital leases, other debt maturities and minimum annual rental commitments under non-cancelable operating leases are as follows (in millions) : Long- Term Debt Capital Leases Total Debt Years Minimum Lease Payments Less Interest Net Present Value Operating Leases Total 2018 $ 35.2 $ 4.9 $ 1.3 $ 3.6 $ 38.8 $ 60.9 $ 99.7 2019 15.5 3.6 0.9 2.7 18.2 52.1 70.3 2020 299.0 2.7 0.8 1.9 300.9 41.8 342.7 2021 12.3 2.7 0.6 2.1 14.4 28.2 42.6 2022 12.4 2.7 0.4 2.3 14.7 21.5 36.2 Thereafter 1,912.8 2.5 0.1 2.4 1,915.2 77.2 1,992.4 Total $ 2,287.2 $ 19.1 $ 4.1 $ 15.0 $ 2,302.2 $ 281.7 $ 2,583.9

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense	Tax Expense (Benefit). Income tax expense (benefit) consists of the following components (in millions): 2017 2016 2015 Current: Federal $ 47.3 $ 1.0 $ — State and local 0.6 0.6 0.3 Foreign 163.8 76.4 51.2 Total current 211.7 78.0 51.5 Deferred: Federal (350.1 ) 92.7 109.3 State and local 11.9 13.1 15.5 Foreign 36.9 (1.0 ) 11.0 Total deferred (301.3 ) 104.8 135.8 Total income tax expense (benefit) $ (89.6 ) $ 182.8 $ 187.3
Schedule of Income before Income Taxes, Domestic and Foreign	Income before income taxes consists of the following (in millions) : 2017 2016 2015 Income before income taxes: U.S. $ 331.8 $ 279.9 $ 315.0 Foreign 542.5 382.8 357.6 Total income before income taxes $ 874.3 $ 662.7 $ 672.6
Schedule of Deferred Tax Assets and Liabilities	The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31 follow (in millions): 2017 2016 Assets: Tax credit and loss carryovers $ 26.9 $ 70.7 Reserves not currently deductible for tax 54.1 106.4 Other 25.2 31.6 Gross deferred tax assets before valuation allowance 106.2 208.7 Valuation allowance (2.1 ) (1.7 ) Net deferred tax assets 104.1 207.0 Liabilities: Property (1,012.7 ) (1,389.0 ) Investments (48.0 ) (73.8 ) Other (30.6 ) (33.5 ) Gross deferred tax liabilities (1,091.3 ) (1,496.3 ) Net deferred tax liability $ (987.2 ) $ (1,289.3 )
Schedule of Effective Income Tax Rate Reconciliation	Tax Rates. Differences between the Company’s effective income tax rate and the U.S. federal statutory income tax rate of 35% follow (in millions): 2017 2016 2015 Dollars Percent Dollars Percent Dollars Percent Income tax expense using the statutory rate in effect $ 306.0 35.0 % $ 231.9 35.0 % $ 235.4 35.0 % Tax effect of: Difference between U.S. and foreign tax rate (25.1 ) (2.9 %) (17.4 ) (2.6 %) (17.8 ) (2.6 %) Foreign exchange (i) 31.6 3.6 % (45.0 ) (6.8 %) (40.5 ) (6.1 %) State and local income tax provision, net 8.3 1.0 % 8.1 1.2 % 10.3 1.5 % Change in U.S. tax rate (487.6 ) (55.8 %) — — — — Deemed mandatory repatriation 74.6 8.6 % — — — — Other, net 2.6 0.3 % 5.2 0.8 % (0.1 ) — Income tax expense (benefit) $ (89.6 ) (10.2 %) $ 182.8 27.6 % $ 187.3 27.8 % _____________________ (i) Mexican income taxes are paid in Mexican pesos, and as a result, the effective income tax rate reflects fluctuations in the value of the Mexican peso against the U.S. dollar. The foreign exchange impact on income taxes includes the gain or loss from the revaluation of the Company’s net U.S. dollar-denominated monetary liabilities into Mexican pesos which is included in Mexican taxable income under Mexican tax law. As a result, a strengthening of the Mexican peso against the U.S. dollar for the reporting period will generally increase the Mexican cash tax obligation and the effective income tax rate, and a weakening of the Mexican peso against the U.S. dollar for the reporting period will generally decrease the Mexican cash tax obligation and the effective tax rate. To hedge its exposure to this cash tax risk, the Company enters into foreign currency derivative contracts, which are measured at fair value each period and any change in fair value is recognized in foreign exchange gain (loss) within the consolidated statements of income. Refer to Note 9 “Derivative Instruments” for further information.
Schedule of Change in Unrecognized Tax Benefits	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows ( in millions ): 2017 2016 Balance at January 1, $ 3.8 $ 1.7 Additions based on tax positions related to the current year — 1.3 Additions for tax positions of prior years — 2.5 Reductions for tax positions of prior years (0.1 ) — Reductions as a result of lapse of statute of limitations (3.7 ) (1.7 ) Balance at December 31, $ — $ 3.8

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2017
Stockholders' Equity Note [Abstract]
Schedule of Capital Stock	Information regarding the Company’s capital stock at December 31 follows: Shares Authorized Shares Issued 2017 2016 2017 2016 $25 par, 4% noncumulative, preferred stock 840,000 840,000 649,736 649,736 $1 par, preferred stock 2,000,000 2,000,000 — — $.01 par, common stock 400,000,000 400,000,000 123,352,185 123,352,185 Shares outstanding at December 31: 2017 2016 $25 par, 4% noncumulative, preferred stock 242,170 242,170 $.01 par, common stock 103,036,805 106,606,619
Schedule of Treasury Stock	Shares of common stock in treasury and related activity follow: 2017 2016 2015 Balance at beginning of year 16,745,566 14,891,041 12,959,855 Shares repurchased 3,759,678 2,127,612 2,133,984 Shares issued to fund stock option exercises (9,110 ) (15,264 ) (89,035 ) Employee stock purchase plan shares issued (76,401 ) (82,372 ) (52,736 ) Nonvested shares issued (124,519 ) (179,309 ) (62,936 ) Nonvested shares forfeited 20,166 3,858 1,909 Balance at end of year 20,315,380 16,745,566 14,891,041
Schedule of Cash Dividends Declared per Common Share	The following table presents the amount of cash dividends declared per common share by the Company’s Board of Directors: 2017 2016 2015 Cash dividends declared per common share $ 1.38 $ 1.32 $ 1.32

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2017
Share-based Compensation [Abstract]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The weighted-average assumptions used were as follows: 2017 2016 2015 Expected dividend yield 1.52 % 1.60 % 0.94 % Expected volatility 30.74 % 32.29 % 37.11 % Risk-free interest rate 2.20 % 1.51 % 1.82 % Expected term (years) 6.0 6.0 6.0 Weighted-average grant date fair value of stock options granted $ 24.49 $ 22.98 $ 41.49
Schedule of Share-based Compensation, Stock Option Activity	A summary of stock option activity is as follows: Number of Shares Weighted- Average Exercise Price Per Share Weighted- Average Remaining Contractual Term Aggregate Intrinsic Value In years In millions Options outstanding at December 31, 2016 414,803 $ 76.87 Granted 97,090 87.11 Exercised (9,110 ) 80.32 Forfeited or expired (2,159 ) 88.35 Options outstanding at December 31, 2017 500,624 $ 78.74 6.1 $ 14.0 Exercisable at December 31, 2017 339,711 $ 74.33 5.0 $ 11.0
Schedule of Stock Option Exercise Activity	Additional information regarding stock option exercises appears in the table below (in millions) : 2017 2016 2015 Aggregate grant-date fair value of stock options vested $ 2.8 $ 1.8 $ 2.0 Intrinsic value of stock options exercised 0.2 0.6 6.1 Cash received from option exercises 0.7 0.9 4.2 Tax benefit from options exercised during the annual period 0.1 0.2 2.3
Schedule Of Share-based Payment Award, Nonvested Stock, Valuation Assumptions	The assumptions used in the Monte Carlo simulation model are consistent with those used to value stock options and were as follows: Nonvested Stock Expected dividend yield 1.58 % Expected volatility 31.68 % Risk-free interest rate 0.53% - 1.89% Expected term (years) 1.9 Weighted-average grant date fair value $ 70.95
Schedule of Share-based Compensation, Nonvested Stock Activity	A summary of nonvested stock activity is as follows: Number of Shares Weighted- Average Grant Date Fair Value Aggregate Intrinsic Value In millions Nonvested stock at December 31, 2016 238,010 $ 91.55 Granted 121,307 93.29 Vested (62,472 ) 87.51 Forfeited (20,166 ) 90.83 Nonvested stock at December 31, 2017 276,679 $ 93.28 $ 29.1
Schedule of Share-based Compensation, Performance Based Award Activity	A summary of performance based nonvested stock activity at target is as follows: Target Number of Shares * Weighted-Average Grant Date Fair Value Nonvested stock, at December 31, 2016 144,399 $ 97.08 Granted 54,588 87.09 Vested (36,323 ) 94.23 Forfeited (23,162 ) 102.30 Nonvested stock, at December 31, 2017 139,502 $ 93.05 _____________________ * For the 2017 Awards and the 2016 Awards, participants in the aggregate can earn up to a maximum of 107,888 and 105,320 shares, respectively. For the 2015 Awards, the performance shares earned were 21,397 .
Schedule of Employee Stock Purchase Plan Activity	The following table summarizes activity related to the various ESPP offerings: Exercise Date Received from Employees(i) In millions Date Issued Purchase Price Shares Issued July 2017 offering January 4, 2018 $ 89.18 30,595 $ 2.7 January 2017 offering July 5, 2017 68.70 40,293 2.8 July 2016 offering January 12, 2017 72.12 36,108 2.6 January 2016 offering July 11, 2016 62.66 41,895 2.6 July 2015 offering January 8, 2016 63.47 40,477 2.6 January 2015 offering July 6, 2015 77.52 35,097 2.7 _____________________ (i) Represents amounts received from employees through payroll deductions for share purchases under applicable offering.
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions	The weighted-average assumptions used for each of the respective periods were as follows: Year Ended December 31, 2017 2016 2015 Expected dividend yield 1.47 % 1.65 % 1.20 % Expected volatility 17.09 % 23.84 % 17.00 % Risk-free interest rate 0.89 % 0.46 % 0.10 % Expected term (years) 0.5 0.5 0.5 Weighted-average grant date fair value $ 17.90 $ 17.29 $ 20.55

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Personal Injury Liability Activity	The personal injury liability activity was as follows (in millions): 2017 2016 Balance at beginning of year $ 23.8 $ 23.9 Accruals 4.8 4.8 Changes in estimate (3.6 ) (1.1 ) Payments (5.7 ) (3.8 ) Balance at end of year $ 19.3 $ 23.8

Quarterly Financial Data (Una39

Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Data [Abstract]
Schedule of Quarterly Financial Information	Fourth Third Second First (In millions, except per share amounts) 2017 Revenues $ 660.4 $ 656.6 $ 656.4 $ 609.5 Operating income 237.8 (i) 233.8 (i) 239.3 (i) 210.7 (i) Net income 552.4 (iii) 129.9 134.7 146.9 Net income attributable to Kansas City Southern and subsidiaries 551.7 129.3 134.4 146.6 Per share data: Basic earnings per common share $ 5.35 $ 1.24 $ 1.27 $ 1.38 Diluted earnings per common share 5.33 1.23 1.27 1.38 2016 Revenues $ 598.5 $ 604.5 $ 568.5 $ 562.7 Operating income 210.9 (ii) 199.8 (ii) 219.9 (ii) 187.9 Net income 130.3 121.0 120.5 108.1 Net income attributable to Kansas City Southern and subsidiaries 129.6 120.6 120.1 107.8 Per share data: Basic earnings per common share $ 1.21 $ 1.12 $ 1.12 $ 1.00 Diluted earnings per common share 1.21 1.12 1.11 0.99 _____________________ (i) During the first, second, third and fourth quarters of 2017, the Company recognized an $11.7 million , $12.8 million , $11.1 million and $8.5 million benefit, respectively, related to a credit available for the excise tax included in the price of fuel that is purchased and consumed in locomotives and certain work equipment in Mexico. (ii) During the second, third and fourth quarters of 2016, the Company recognized a $34.0 million , $15.6 million and $13.2 million benefit, respectively, related to a credit available for the excise tax included in the price of fuel that is purchased and consumed in locomotives and certain work equipment in Mexico. (iii) During the fourth quarter of 2017, the Company recognized a $413.0 million net tax benefit as a result of the Tax Reform Act, which was signed into law December 22, 2017.

Geographic Information (Tables)

Geographic Information (Tables)	12 Months Ended
	Dec. 31, 2017
Segment Reporting [Abstract]
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas	The following tables provide information by geographic area (in millions) : Years ended December 31, 2017 2016 2015 Revenues U.S. $ 1,359.5 $ 1,210.8 $ 1,248.4 Mexico 1,223.4 1,123.4 1,170.4 Total revenues $ 2,582.9 $ 2,334.2 $ 2,418.8 December 31, 2017 2016 Property and equipment (including concession assets), net U.S. $ 5,227.3 $ 4,960.6 Mexico 3,176.5 3,109.1 Total property and equipment (including concession assets), net $ 8,403.8 $ 8,069.7

Condensed Consolidating Finan41

Condensed Consolidating Financial Information (Tables)	12 Months Ended
	Dec. 31, 2017
Condensed Consolidating Financial Information KCS [Member]
Condensed Financial Statements [Line Items]
Condensed Consolidating Statements of Comprehensive Income	Condensed Consolidating Statements of Comprehensive Income - KCS Notes 2017 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Revenues $ — $ 1,244.7 $ 1,359.0 $ (20.8 ) $ 2,582.9 Operating expenses 5.7 882.2 791.0 (17.6 ) 1,661.3 Operating income (loss) (5.7 ) 362.5 568.0 (3.2 ) 921.6 Equity in net earnings of affiliates 974.8 6.4 9.6 (979.3 ) 11.5 Interest expense (81.3 ) (72.2 ) (34.4 ) 87.7 (100.2 ) Debt retirement and exchange costs — — — — — Foreign exchange gain — — 41.7 — 41.7 Other income (expense), net 86.7 (0.6 ) 1.2 (87.6 ) (0.3 ) Income before income taxes 974.5 296.1 586.1 (982.4 ) 874.3 Income tax expense (benefit) 9.9 (353.1 ) 254.2 (0.6 ) (89.6 ) Net income 964.6 649.2 331.9 (981.8 ) 963.9 Less: Net income attributable to noncontrolling interest — — 1.9 — 1.9 Net income attributable to Kansas City Southern and subsidiaries 964.6 649.2 330.0 (981.8 ) 962.0 Other comprehensive income (loss) (6.7 ) — 0.5 (0.5 ) (6.7 ) Comprehensive income attributable to Kansas City Southern and subsidiaries $ 957.9 $ 649.2 $ 330.5 $ (982.3 ) $ 955.3 Condensed Consolidating Statements of Comprehensive Income - KCS Notes—(Continued) 2016 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Revenues $ — $ 1,101.3 $ 1,252.5 $ (19.6 ) $ 2,334.2 Operating expenses 4.7 794.7 734.0 (17.7 ) 1,515.7 Operating income (loss) (4.7 ) 306.6 518.5 (1.9 ) 818.5 Equity in net earnings of affiliates 468.5 5.3 12.7 (471.9 ) 14.6 Interest expense (81.9 ) (83.0 ) (63.1 ) 130.3 (97.7 ) Debt retirement and exchange costs — — — — — Foreign exchange loss — — (72.0 ) — (72.0 ) Other income (expense), net 104.4 (0.2 ) 24.1 (129.0 ) (0.7 ) Income before income taxes 486.3 228.7 420.2 (472.5 ) 662.7 Income tax expense 7.1 87.4 89.2 (0.9 ) 182.8 Net income 479.2 141.3 331.0 (471.6 ) 479.9 Less: Net income attributable to noncontrolling interest — — 1.8 — 1.8 Net income attributable to Kansas City Southern and subsidiaries 479.2 141.3 329.2 (471.6 ) 478.1 Other comprehensive loss (1.5 ) — (2.5 ) 2.5 (1.5 ) Comprehensive income attributable to Kansas City Southern and subsidiaries $ 477.7 $ 141.3 $ 326.7 $ (469.1 ) $ 476.6 2015 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Revenues $ — $ 1,135.9 $ 1,302.3 $ (19.4 ) $ 2,418.8 Operating expenses 4.6 779.7 849.3 (18.6 ) 1,615.0 Operating income (loss) (4.6 ) 356.2 453.0 (0.8 ) 803.8 Equity in net earnings of affiliates 464.0 5.6 16.5 (467.8 ) 18.3 Interest expense (4.6 ) (84.9 ) (40.1 ) 47.7 (81.9 ) Debt retirement and exchange costs 0.1 (5.2 ) (2.5 ) — (7.6 ) Foreign exchange loss — — (56.6 ) — (56.6 ) Other income (expense), net 45.9 (3.1 ) 1.4 (47.6 ) (3.4 ) Income before income taxes 500.8 268.6 371.7 (468.5 ) 672.6 Income tax expense 16.5 98.3 72.5 — 187.3 Net income 484.3 170.3 299.2 (468.5 ) 485.3 Less: Net income attributable to noncontrolling interest — — 1.8 — 1.8 Net income attributable to Kansas City Southern and subsidiaries 484.3 170.3 297.4 (468.5 ) 483.5 Other comprehensive loss (1.5 ) — (2.2 ) 2.2 (1.5 ) Comprehensive income attributable to Kansas City Southern and subsidiaries $ 482.8 $ 170.3 $ 295.2 $ (466.3 ) $ 482.0
Condensed Consolidating Balance Sheets	Condensed Consolidating Balance Sheets - KCS Notes December 31, 2017 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Assets: Current assets $ 292.0 $ 222.9 $ 475.5 $ (310.3 ) $ 680.1 Investments — 3.9 40.7 — 44.6 Investments in consolidated subsidiaries 4,462.4 184.2 — (4,646.6 ) — Property and equipment (including concession assets), net — 4,454.8 3,954.9 (5.9 ) 8,403.8 Other assets 2,159.6 46.8 252.5 (2,388.7 ) 70.2 Total assets $ 6,914.0 $ 4,912.6 $ 4,723.6 $ (7,351.5 ) $ 9,198.7 Liabilities and equity: Current liabilities $ 277.9 $ 673.6 $ 332.0 $ (311.8 ) $ 971.7 Long-term debt 2,066.8 1,517.2 1,040.3 (2,388.8 ) 2,235.5 Deferred income taxes (7.1 ) 818.8 177.0 (1.5 ) 987.2 Other liabilities 13.5 70.3 55.1 — 138.9 Stockholders’ equity 4,562.9 1,832.7 2,802.7 (4,649.4 ) 4,548.9 Noncontrolling interest — — 316.5 — 316.5 Total liabilities and equity $ 6,914.0 $ 4,912.6 $ 4,723.6 $ (7,351.5 ) $ 9,198.7 December 31, 2016 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Assets: Current assets $ 18.3 $ 275.4 $ 389.6 $ (35.3 ) $ 648.0 Investments — 3.9 29.0 — 32.9 Investments in consolidated subsidiaries 3,497.7 179.1 — (3,676.8 ) — Property and equipment (including concession assets), net — 4,203.6 3,868.8 (2.7 ) 8,069.7 Other assets 2,767.9 43.0 252.6 (2,996.6 ) 66.9 Total assets $ 6,283.9 $ 4,705.0 $ 4,540.0 $ (6,711.4 ) $ 8,817.5 Liabilities and equity: Current liabilities $ 87.3 $ 432.8 $ 261.0 $ (36.7 ) $ 744.4 Long-term debt 2,064.3 1,928.9 1,274.9 (2,996.6 ) 2,271.5 Deferred income taxes 26.9 1,075.3 188.0 (0.9 ) 1,289.3 Other liabilities 4.0 86.3 17.5 — 107.8 Stockholders’ equity 4,101.4 1,181.7 2,484.0 (3,677.2 ) 4,089.9 Noncontrolling interest — — 314.6 — 314.6 Total liabilities and equity $ 6,283.9 $ 4,705.0 $ 4,540.0 $ (6,711.4 ) $ 8,817.5
Condensed Consolidating Statements of Cash Flows	Condensed Consolidating Statements of Cash Flows - KCS Notes 2017 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Operating activities: Net cash provided $ 220.4 $ 557.0 $ 266.9 $ (15.9 ) $ 1,028.4 Investing activities: Capital expenditures — (375.5 ) (209.9 ) — (585.4 ) Purchase or replacement of equipment under operating leases — (42.6 ) — — (42.6 ) Property investments in MSLLC — — (26.0 ) — (26.0 ) Investments in and advances to affiliates (0.6 ) (0.6 ) (20.4 ) 1.2 (20.4 ) Proceeds from repayment of loans to affiliates 12,241.7 — — (12,241.7 ) — Loans to affiliates (12,102.6 ) — — 12,102.6 — Proceeds from disposal of property — 6.0 2.8 — 8.8 Other investing activities — (17.2 ) (1.7 ) 3.4 (15.5 ) Net cash provided (used) 138.5 (429.9 ) (255.2 ) (134.5 ) (681.1 ) Financing activities: Proceeds from short-term borrowings 12,102.6 — — — 12,102.6 Repayment of short-term borrowings (11,943.6 ) — — — (11,943.6 ) Repayment of long-term debt — (3.6 ) (21.8 ) — (25.4 ) Dividends paid (142.5 ) — (12.5 ) 12.5 (142.5 ) Shares repurchased (375.6 ) — — — (375.6 ) Proceeds from loans from affiliates — 12,102.6 — (12,102.6 ) — Repayment of loans from affiliates — (12,241.7 ) — 12,241.7 — Contributions from affiliates — 0.6 0.6 (1.2 ) — Other financing activities 0.7 — — — 0.7 Net cash used (358.4 ) (142.1 ) (33.7 ) 150.4 (383.8 ) Cash and cash equivalents: Net increase (decrease) 0.5 (15.0 ) (22.0 ) — (36.5 ) At beginning of year 0.2 32.6 137.8 — 170.6 At end of year $ 0.7 $ 17.6 $ 115.8 $ — $ 134.1 Condensed Consolidating Statements of Cash Flows - KCS Notes—(Continued) 2016 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Operating activities: Net cash provided $ 434.1 $ 236.0 $ 482.7 $ (233.8 ) $ 919.0 Investing activities: Capital expenditures — (372.8 ) (190.8 ) — (563.6 ) Purchase or replacement of equipment under operating leases — (26.6 ) — — (26.6 ) Property investments in MSLLC — — (33.1 ) — (33.1 ) Investments in and advances to affiliates (153.4 ) (6.5 ) (0.9 ) 159.9 (0.9 ) Proceeds from repayment of loans to affiliates 9,067.7 — — (9,067.7 ) — Loans to affiliates (9,123.4 ) — — 9,123.4 — Proceeds from disposal of property — 2.0 3.1 (0.1 ) 5.0 Other investing activities — (14.9 ) 3.9 2.0 (9.0 ) Net cash used (209.1 ) (418.8 ) (217.8 ) 217.5 (628.2 ) Financing activities: Proceeds from short-term borrowings 8,698.7 243.5 — (243.5 ) 8,698.7 Repayment of short-term borrowings (8,597.9 ) (243.5 ) — 243.5 (8,597.9 ) Proceeds from issuance of long-term debt 248.7 — — — 248.7 Repayment of long-term debt (244.8 ) (3.5 ) (28.1 ) — (276.4 ) Dividends paid (142.8 ) — (230.2 ) 230.2 (142.8 ) Shares repurchased (185.4 ) — — — (185.4 ) Proceeds from loans from affiliates — 8,879.9 — (8,879.9 ) — Repayment of loans from affiliates — (8,824.2 ) — 8,824.2 — Contribution from affiliates — 153.1 6.8 (159.9 ) — Other financing activities (1.5 ) (0.1 ) (1.8 ) 1.7 (1.7 ) Net cash provided (used) (225.0 ) 205.2 (253.3 ) 16.3 (256.8 ) Cash and cash equivalents: Net increase — 22.4 11.6 — 34.0 At beginning of year 0.2 10.2 126.2 — 136.6 At end of year $ 0.2 $ 32.6 $ 137.8 $ — $ 170.6 Condensed Consolidating Statements of Cash Flows - KCS Notes—(Continued) 2015 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Operating activities: Net cash provided $ 45.2 $ 356.6 $ 526.0 $ (18.6 ) $ 909.2 Investing activities: Capital expenditures — (382.8 ) (305.2 ) — (688.0 ) Purchase or replacement of equipment under operating leases — (82.8 ) (61.4 ) — (144.2 ) Property investments in MSLLC — — (17.4 ) — (17.4 ) Investments in and advances to affiliates (0.7 ) (0.7 ) (0.7 ) 1.4 (0.7 ) Proceeds from repayment of loans to affiliates 293.9 — — (293.9 ) — Loans to affiliates (80.0 ) — — 80.0 — Proceeds from disposal of property — 1.3 3.6 (0.3 ) 4.6 Other investing activities (0.1 ) (32.0 ) 3.6 1.2 (27.3 ) Net cash provided (used) 213.1 (497.0 ) (377.5 ) (211.6 ) (873.0 ) Financing activities: Proceeds from short-term borrowings 80.0 10,786.2 — — 10,866.2 Repayment of short-term borrowings — (10,937.3 ) (300.0 ) — (11,237.3 ) Proceeds from issuance of long-term debt — 663.7 40.0 (80.0 ) 623.7 Repayment of long-term debt — (88.4 ) (61.4 ) — (149.8 ) Dividends paid (140.1 ) — (17.8 ) 17.8 (140.1 ) Shares repurchased (194.2 ) — — — (194.2 ) Repayment of loans from affiliates — (293.9 ) — 293.9 — Other financing activities (4.0 ) (9.2 ) (1.4 ) (1.5 ) (16.1 ) Net cash provided (used) (258.3 ) 121.1 (340.6 ) 230.2 (247.6 ) Cash and cash equivalents: Net decrease — (19.3 ) (192.1 ) — (211.4 ) At beginning of year 0.2 29.5 318.3 — 348.0 At end of year $ 0.2 $ 10.2 $ 126.2 $ — $ 136.6
Condensed Consolidating Financial Information KCSR [Member]
Condensed Financial Statements [Line Items]
Condensed Consolidating Statements of Comprehensive Income	Condensed Consolidating Statements of Comprehensive Income - KCSR Notes 2017 Parent KCSR Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Revenues $ — $ 1,220.8 $ 43.5 $ 1,359.0 $ (40.4 ) $ 2,582.9 Operating expenses 5.7 862.8 39.1 791.0 (37.3 ) 1,661.3 Operating income (loss) (5.7 ) 358.0 4.4 568.0 (3.1 ) 921.6 Equity in net earnings of affiliates 974.8 19.0 4.5 9.6 (996.4 ) 11.5 Interest expense (81.3 ) (72.2 ) — (34.4 ) 87.7 (100.2 ) Debt retirement and exchange costs — — — — — — Foreign exchange gain — — — 41.7 — 41.7 Other income (expense), net 86.7 (0.6 ) — 1.2 (87.6 ) (0.3 ) Income before income taxes 974.5 304.2 8.9 586.1 (999.4 ) 874.3 Income tax expense (benefit) 9.9 (310.6 ) (42.5 ) 254.2 (0.6 ) (89.6 ) Net income 964.6 614.8 51.4 331.9 (998.8 ) 963.9 Less: Net income attributable to noncontrolling interest — — — 1.9 — 1.9 Net income attributable to Kansas City Southern and subsidiaries 964.6 614.8 51.4 330.0 (998.8 ) 962.0 Other comprehensive income (loss) (6.7 ) — — 0.5 (0.5 ) (6.7 ) Comprehensive income attributable to Kansas City Southern and subsidiaries $ 957.9 $ 614.8 $ 51.4 $ 330.5 $ (999.3 ) $ 955.3 Condensed Consolidating Statements of Comprehensive Income - KCSR Notes—(Continued) 2016 Parent KCSR Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Revenues $ — $ 1,077.3 $ 43.7 $ 1,252.5 $ (39.3 ) $ 2,334.2 Operating expenses 4.7 776.3 38.1 734.0 (37.4 ) 1,515.7 Operating income (loss) (4.7 ) 301.0 5.6 518.5 (1.9 ) 818.5 Equity in net earnings (losses) of affiliates 468.5 (0.2 ) 3.5 12.7 (469.9 ) 14.6 Interest expense (81.9 ) (83.0 ) — (63.1 ) 130.3 (97.7 ) Debt retirement and exchange costs — — — — — — Foreign exchange loss — — — (72.0 ) — (72.0 ) Other income (expense), net 104.4 (0.2 ) — 24.1 (129.0 ) (0.7 ) Income before income taxes 486.3 217.6 9.1 420.2 (470.5 ) 662.7 Income tax expense 7.1 84.3 3.1 89.2 (0.9 ) 182.8 Net income 479.2 133.3 6.0 331.0 (469.6 ) 479.9 Less: Net income attributable to noncontrolling interest — — — 1.8 — 1.8 Net income attributable to Kansas City Southern and subsidiaries 479.2 133.3 6.0 329.2 (469.6 ) 478.1 Other comprehensive loss (1.5 ) — — (2.5 ) 2.5 (1.5 ) Comprehensive income attributable to Kansas City Southern and subsidiaries $ 477.7 $ 133.3 $ 6.0 $ 326.7 $ (467.1 ) $ 476.6 Condensed Consolidating Statements of Comprehensive Income - KCSR Notes—(Continued) 2015 Parent KCSR Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Revenues $ — $ 1,112.5 $ 42.1 $ 1,302.3 $ (38.1 ) $ 2,418.8 Operating expenses 4.6 760.4 38.0 849.3 (37.3 ) 1,615.0 Operating income (loss) (4.6 ) 352.1 4.1 453.0 (0.8 ) 803.8 Equity in net earnings (losses) of affiliates 464.0 (1.4 ) 3.7 16.5 (464.5 ) 18.3 Interest expense (4.6 ) (84.8 ) (0.1 ) (40.1 ) 47.7 (81.9 ) Debt retirement and exchange costs 0.1 (5.2 ) — (2.5 ) — (7.6 ) Foreign exchange loss — — — (56.6 ) — (56.6 ) Other income (expense), net 45.9 (3.2 ) 0.1 1.4 (47.6 ) (3.4 ) Income before income taxes 500.8 257.5 7.8 371.7 (465.2 ) 672.6 Income tax expense 16.5 95.2 3.1 72.5 — 187.3 Net income 484.3 162.3 4.7 299.2 (465.2 ) 485.3 Less: Net income attributable to noncontrolling interest — — — 1.8 — 1.8 Net income attributable to Kansas City Southern and subsidiaries 484.3 162.3 4.7 297.4 (465.2 ) 483.5 Other comprehensive loss (1.5 ) — — (2.2 ) 2.2 (1.5 ) Comprehensive income attributable to Kansas City Southern and subsidiaries $ 482.8 $ 162.3 $ 4.7 $ 295.2 $ (463.0 ) $ 482.0
Condensed Consolidating Balance Sheets	Condensed Consolidating Balance Sheets - KCSR Notes December 31, 2017 Parent KCSR Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Assets: Current assets $ 292.0 $ 214.1 $ 8.8 $ 475.5 $ (310.3 ) $ 680.1 Investments — 3.9 — 40.7 — 44.6 Investments in consolidated subsidiaries 4,462.4 7.4 182.2 — (4,652.0 ) — Property and equipment (including concession assets), net — 4,283.2 171.6 3,954.9 (5.9 ) 8,403.8 Other assets 2,159.6 46.8 — 252.5 (2,388.7 ) 70.2 Total assets $ 6,914.0 $ 4,555.4 $ 362.6 $ 4,723.6 $ (7,356.9 ) $ 9,198.7 Liabilities and equity: Current liabilities $ 277.9 $ 578.7 $ 94.9 $ 332.0 $ (311.8 ) $ 971.7 Long-term debt 2,066.8 1,517.2 — 1,040.3 (2,388.8 ) 2,235.5 Deferred income taxes (7.1 ) 734.8 84.0 177.0 (1.5 ) 987.2 Other liabilities 13.5 70.0 0.3 55.1 — 138.9 Stockholders’ equity 4,562.9 1,654.7 183.4 2,802.7 (4,654.8 ) 4,548.9 Noncontrolling interest — — — 316.5 — 316.5 Total liabilities and equity $ 6,914.0 $ 4,555.4 $ 362.6 $ 4,723.6 $ (7,356.9 ) $ 9,198.7 December 31, 2016 Parent KCSR Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Assets: Current assets $ 18.3 $ 271.8 $ 4.6 $ 389.6 $ (36.3 ) $ 648.0 Investments — 3.9 — 29.0 — 32.9 Investments in consolidated subsidiaries 3,497.7 (9.8 ) 177.1 — (3,665.0 ) — Property and equipment (including concession assets), net — 4,024.5 179.1 3,868.8 (2.7 ) 8,069.7 Other assets 2,767.9 43.0 — 252.6 (2,996.6 ) 66.9 Total assets $ 6,283.9 $ 4,333.4 $ 360.8 $ 4,540.0 $ (6,700.6 ) $ 8,817.5 Liabilities and equity: Current liabilities $ 87.3 $ 342.1 $ 91.7 $ 261.0 $ (37.7 ) $ 744.4 Long-term debt 2,064.3 1,928.8 0.1 1,274.9 (2,996.6 ) 2,271.5 Deferred income taxes 26.9 937.7 137.6 188.0 (0.9 ) 1,289.3 Other liabilities 4.0 86.2 0.1 17.5 — 107.8 Stockholders’ equity 4,101.4 1,038.6 131.3 2,484.0 (3,665.4 ) 4,089.9 Noncontrolling interest — — — 314.6 — 314.6 Total liabilities and equity $ 6,283.9 $ 4,333.4 $ 360.8 $ 4,540.0 $ (6,700.6 ) $ 8,817.5
Condensed Consolidating Statements of Cash Flows	Condensed Consolidating Statements of Cash Flows - KCSR Notes 2017 Parent KCSR Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Operating activities: Net cash provided $ 220.4 $ 556.6 $ 0.4 $ 266.9 $ (15.9 ) $ 1,028.4 Investing activities: Capital expenditures — (375.2 ) (0.3 ) (209.9 ) — (585.4 ) Purchase or replacement of equipment under operating leases — (42.6 ) — — — (42.6 ) Property investments in MSLLC — — — (26.0 ) — (26.0 ) Investments in and advances to affiliates (0.6 ) — (0.6 ) (20.4 ) 1.2 (20.4 ) Proceeds from repayment of loans to affiliates 12,241.7 — — — (12,241.7 ) — Loans to affiliates (12,102.6 ) — — — 12,102.6 — Proceeds from disposal of property — 6.0 — 2.8 — 8.8 Other investing activities — (17.2 ) — (1.7 ) 3.4 (15.5 ) Net cash provided (used) 138.5 (429.0 ) (0.9 ) (255.2 ) (134.5 ) (681.1 ) Financing activities: Proceeds from short-term borrowings 12,102.6 — — — — 12,102.6 Repayment of short-term borrowings (11,943.6 ) — — — — (11,943.6 ) Repayment of long-term debt — (3.5 ) (0.1 ) (21.8 ) — (25.4 ) Dividends paid (142.5 ) — — (12.5 ) 12.5 (142.5 ) Shares repurchased (375.6 ) — — — — (375.6 ) Proceeds from loans from affiliates — 12,102.6 — — (12,102.6 ) — Repayment of loans from affiliates — (12,241.7 ) — — 12,241.7 — Contributions from affiliates — — 0.6 0.6 (1.2 ) — Other financing activities 0.7 — — — — 0.7 Net cash provided (used) (358.4 ) (142.6 ) 0.5 (33.7 ) 150.4 (383.8 ) Cash and cash equivalents: Net increase (decrease) 0.5 (15.0 ) — (22.0 ) — (36.5 ) At beginning of year 0.2 32.6 — 137.8 — 170.6 At end of year $ 0.7 $ 17.6 $ — $ 115.8 $ — $ 134.1 Condensed Consolidating Statements of Cash Flows - KCSR Notes—(Continued) 2016 Parent KCSR Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Operating activities: Net cash provided $ 434.1 $ 235.4 $ 0.6 $ 482.7 $ (233.8 ) $ 919.0 Investing activities: Capital expenditures — (372.2 ) (0.6 ) (190.8 ) — (563.6 ) Purchase or replacement of equipment under operating leases — (26.6 ) — — — (26.6 ) Property investments in MSLLC — — — (33.1 ) — (33.1 ) Investments in and advances to affiliates (153.4 ) — (6.5 ) (0.9 ) 159.9 (0.9 ) Proceeds from repayment of loans to affiliates 9,067.7 — — — (9,067.7 ) — Loans to affiliates (9,123.4 ) — — — 9,123.4 — Proceeds from disposal of property — 2.0 — 3.1 (0.1 ) 5.0 Other investing activities — (14.9 ) — 3.9 2.0 (9.0 ) Net cash used (209.1 ) (411.7 ) (7.1 ) (217.8 ) 217.5 (628.2 ) Financing activities: Proceeds from short-term borrowings 8,698.7 243.5 — — (243.5 ) 8,698.7 Repayment of short-term borrowings (8,597.9 ) (243.5 ) — — 243.5 (8,597.9 ) Proceeds from issuance of long-term debt 248.7 — — — — 248.7 Repayment of long-term debt (244.8 ) (3.4 ) (0.1 ) (28.1 ) — (276.4 ) Dividends paid (142.8 ) — — (230.2 ) 230.2 (142.8 ) Shares repurchased (185.4 ) — — — — (185.4 ) Proceeds from loans from affiliates — 8,879.9 — — (8,879.9 ) — Repayment of loans from affiliates — (8,824.2 ) — — 8,824.2 — Contribution from affiliates — 146.6 6.5 6.8 (159.9 ) — Other financing activities (1.5 ) (0.1 ) — (1.8 ) 1.7 (1.7 ) Net cash provided (used) (225.0 ) 198.8 6.4 (253.3 ) 16.3 (256.8 ) Cash and cash equivalents: Net increase (decrease) — 22.5 (0.1 ) 11.6 — 34.0 At beginning of year 0.2 10.1 0.1 126.2 — 136.6 At end of year $ 0.2 $ 32.6 $ — $ 137.8 $ — $ 170.6 Condensed Consolidating Statements of Cash Flows - KCSR Notes—(Continued) 2015 Parent KCSR Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Consolidated KCS Operating activities: Net cash provided $ 45.2 $ 355.6 $ 1.0 $ 526.0 $ (18.6 ) $ 909.2 Investing activities: Capital expenditures — (381.5 ) (1.3 ) (305.2 ) — (688.0 ) Purchase or replacement of equipment under operating leases — (82.8 ) — (61.4 ) — (144.2 ) Property investments in MSLLC — — — (17.4 ) — (17.4 ) Investments in and advances to affiliates (0.7 ) — (0.7 ) (0.7 ) 1.4 (0.7 ) Proceeds from repayment of loans to affiliates 293.9 — — — (293.9 ) — Loans to affiliates (80.0 ) — — — 80.0 — Proceeds from disposal of property — 1.3 — 3.6 (0.3 ) 4.6 Other investing activities (0.1 ) (32.0 ) — 3.6 1.2 (27.3 ) Net cash provided (used) 213.1 (495.0 ) (2.0 ) (377.5 ) (211.6 ) (873.0 ) Financing activities: Proceeds from short-term borrowings 80.0 10,786.2 — — — 10,866.2 Repayment of short-term borrowings — (10,937.3 ) — (300.0 ) — (11,237.3 ) Proceeds from issuance of long-term debt — 663.7 — 40.0 (80.0 ) 623.7 Repayment of long-term debt — (88.3 ) (0.1 ) (61.4 ) — (149.8 ) Dividends paid (140.1 ) — — (17.8 ) 17.8 (140.1 ) Shares repurchased (194.2 ) — — — — (194.2 ) Repayment of loans from affiliates — (293.9 ) — — 293.9 — Other financing activities (4.0 ) (9.9 ) 0.7 (1.4 ) (1.5 ) (16.1 ) Net cash provided (used) (258.3 ) 120.5 0.6 (340.6 ) 230.2 (247.6 ) Cash and cash equivalents: Net decrease — (18.9 ) (0.4 ) (192.1 ) — (211.4 ) At beginning of year 0.2 29.0 0.5 318.3 — 348.0 At end of year $ 0.2 $ 10.1 $ 0.1 $ 126.2 $ — $ 136.6

Description of the Business (De

Description of the Business (Details)	12 Months Ended
	Dec. 31, 2017
MSLLC [Member]
Description Of The Business [Line Items]
Ownership percentage of MSLLC	70.00%
PCRC [Member]
Description Of The Business [Line Items]
Equity investment ownership percentage	50.00%
TCM [Member]
Description Of The Business [Line Items]
Equity investment ownership percentage	45.00%
FTVM [Member]
Description Of The Business [Line Items]
Equity investment ownership percentage	25.00%
PTC-220 [Member]
Description Of The Business [Line Items]
Equity investment ownership percentage	14.00%
KCSM [Member]
Description Of The Business [Line Items]
Percentage of gross revenue payable under railroad Concession to Mexican government	1.25%
KCSM [Member] | Maximum [Member]
Description Of The Business [Line Items]
Additional Concession renewal period	50 years
KCSR [Member] | Unionized Employees Concentration Risk [Member] | Number of Employees, Total [Member]
Description Of The Business [Line Items]
Percentage of employees covered by collective bargaining or labor agreements	75.00%
KCSM Servicios [Member] | Unionized Employees Concentration Risk [Member] | Number of Employees, Total [Member]
Description Of The Business [Line Items]
Percentage of employees covered by collective bargaining or labor agreements	80.00%

Significant Accounting Polici43

Significant Accounting Policies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
Allowance for doubtful accounts	$ 4.6	$ 5.3
Bad debt expense	1.6	1.2	$ 1
Goodwill	13.2	$ 13.2
Operating leases, leases and debt maturities table	$ 281.7

Mexican Fuel Excise Tax Credit

Mexican Fuel Excise Tax Credit (Details) - USD ($) $ in Millions	3 Months Ended							12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Mexican Fuel Excise Tax Credit [Line Items]
Benefit recognized by the Company relating to a Mexican fuel excise tax credit	$ 8.5	$ 11.1	$ 12.8	$ 11.7	$ 13.2	$ 15.6	$ 34	$ 44.1	$ 62.8	$ 0
Mexican Tax Authority [Member]
Mexican Fuel Excise Tax Credit [Line Items]
Benefit recognized by the Company relating to a Mexican fuel excise tax credit								$ 44.1	$ 62.8

Earnings Per Share Reconciliati

Earnings Per Share Reconciliation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share Reconciliation [Abstract]
Net income available to common stockholders for purposes of computing basic earnings per share									$ 961.8	$ 477.9	$ 483.3
Net income available to common stockholders for purposes of computing diluted earnings per share									$ 961.8	$ 477.9	$ 483.3
Weighted-average number of shares outstanding reconciliation
Basic shares									104,728	107,560	109,709
Effect of dilution									312	201	206
Diluted									105,040	107,761	109,915
Earnings per Share [Abstract]
Basic earnings per share	$ 5.35	$ 1.24	$ 1.27	$ 1.38	$ 1.21	$ 1.12	$ 1.12	$ 1	$ 9.18	$ 4.44	$ 4.41
Diluted earnings per share	$ 5.33	$ 1.23	$ 1.27	$ 1.38	$ 1.21	$ 1.12	$ 1.11	$ 0.99	$ 9.16	$ 4.43	$ 4.40
Stock Options [Member]
Potentially dilutive shares excluded from the calculation [Abstract]
Stock options excluded as their inclusion would be anti-dilutive									150	185	84

Property and Equipment (inclu46

Property and Equipment (including Concession Assets) (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Accumulated amortization	$ 638.2	$ 610.7
Concession assets, net of accumulated amortization	2,208.1	2,131.6
Capitalized interest during period	0.3	0.5	$ 0.7
Depreciation and amortization	$ 320.9	$ 305	$ 284.6

Property and Equipment (inclu47

Property and Equipment (including Concession Assets) Schedule of Property and Equipment (including Concession Assets) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Cost		$ 10,904.6	$ 10,461.8
Accumulated Depreciation		(2,500.8)	(2,392.1)
Net Book Value		8,403.8	8,069.7
Land [Member]
Property, Plant and Equipment [Line Items]
Cost		218.6	219.2
Accumulated Depreciation		0	0
Net Book Value		218.6	219.2
Concession land rights [Member]
Property, Plant and Equipment [Line Items]
Cost		141.2	141.2
Accumulated Depreciation		(26.5)	(25.1)
Net Book Value		$ 114.7	$ 116.1
Depreciation Rates		1.00%	1.00%
Road property [Member]
Property, Plant and Equipment [Line Items]
Cost		$ 7,557.1	$ 7,186
Accumulated Depreciation		(1,759.2)	(1,707.8)
Net Book Value		$ 5,797.9	$ 5,478.2
Depreciation Rates		2.80%	2.80%
Rail and other track material [Member]
Property, Plant and Equipment [Line Items]
Cost		$ 1,967	$ 1,925.4
Accumulated Depreciation		(425.9)	(445)
Net Book Value		$ 1,541.1	$ 1,480.4
Rail and other track material [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciation Rates		2.70%	1.60%
Rail and other track material [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciation Rates		3.00%	3.20%
Ties [Member]
Property, Plant and Equipment [Line Items]
Cost		$ 1,779.6	$ 1,710.1
Accumulated Depreciation		(441)	(423.8)
Net Book Value		$ 1,338.6	$ 1,286.3
Ties [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciation Rates		2.00%	2.00%
Ties [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciation Rates		4.80%	5.00%
Grading [Member]
Property, Plant and Equipment [Line Items]
Cost		$ 969.9	$ 910.7
Accumulated Depreciation		(162.1)	(153.9)
Net Book Value		$ 807.8	$ 756.8
Depreciation Rates		0.90%	0.90%
Bridges and tunnels [Member]
Property, Plant and Equipment [Line Items]
Cost		$ 775	$ 739.4
Accumulated Depreciation		(144.9)	(137.6)
Net Book Value		$ 630.1	$ 601.8
Depreciation Rates		1.10%	1.10%
Ballast [Member]
Property, Plant and Equipment [Line Items]
Cost		$ 795.2	$ 748.3
Accumulated Depreciation		(222)	(215.1)
Net Book Value		$ 573.2	$ 533.2
Ballast [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciation Rates		2.30%	2.50%
Ballast [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciation Rates		4.20%	4.70%
Other road property [Member]
Property, Plant and Equipment [Line Items]
Cost	[1]	$ 1,270.4	$ 1,152.1
Accumulated Depreciation	[1]	(363.3)	(332.4)
Net Book Value	[1]	$ 907.1	$ 819.7
Depreciation Rates	[1]	3.20%	3.00%
Equipment [Member]
Property, Plant and Equipment [Line Items]
Cost		$ 2,534.9	$ 2,439.8
Accumulated Depreciation		(570.7)	(533)
Net Book Value		$ 1,964.2	$ 1,906.8
Depreciation Rates		4.00%	4.20%
Locomotives [Member]
Property, Plant and Equipment [Line Items]
Cost		$ 1,527.9	$ 1,485.9
Accumulated Depreciation		(375.2)	(356.9)
Net Book Value		$ 1,152.7	$ 1,129
Depreciation Rates		4.70%	4.50%
Freight cars [Member]
Property, Plant and Equipment [Line Items]
Cost		$ 937.9	$ 887.7
Accumulated Depreciation		(168.9)	(152.5)
Net Book Value		$ 769	$ 735.2
Depreciation Rates		2.70%	3.50%
Other equipment [Member]
Property, Plant and Equipment [Line Items]
Cost		$ 69.1	$ 66.2
Accumulated Depreciation		(26.6)	(23.6)
Net Book Value		$ 42.5	$ 42.6
Depreciation Rates		5.90%	6.40%
Technology and other [Member]
Property, Plant and Equipment [Line Items]
Cost		$ 229.1	$ 182.2
Accumulated Depreciation		(144.4)	(126.2)
Net Book Value		$ 84.7	$ 56
Depreciation Rates		17.10%	17.40%
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Cost		$ 223.7	$ 293.4
Accumulated Depreciation		0	0
Net Book Value		$ 223.7	$ 293.4
[1]	Other includes signals, buildings and other road assets.

Other Balance Sheet Captions Ot

Other Balance Sheet Captions Other Current Assets (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Other Balance Sheet Captions [Abstract]
Refundable taxes	$ 81.6	$ 64
Mexican fuel excise tax credit	35.1	49.2
Prepaid expenses	18.3	18.2
Other	22.4	2.4
Other current assets	$ 157.4	$ 133.8

Other Balance Sheet Captions Ac

Other Balance Sheet Captions Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other Balance Sheet Captions [Abstract]
Accounts payable	$ 225.1	$ 247.8
Income and other taxes	111.8	36
Accrued wages and vacation	89	78.7
Derailments, personal injury and other claim provisions	48	39.2
Foreign currency derivative instruments	0	41.1
Dividends payable	37.2	35.2	$ 35.9
Other	76.7	59.7
Accounts payable and accrued liabilities	$ 587.8	$ 537.7

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of Company's debt	$ 2,274.3	$ 2,296.9
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of Company's debt	2,377.8	2,303.8
Foreign Currency Derivative Instruments [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of derivative assets	7.9
Fair value of derivative liabilities		$ 41.1
Treasury Lock Agreements [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of derivative liabilities	$ 5.6

Derivative Instruments Interest

Derivative Instruments Interest Rate Derivative Instruments (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)	May 31, 2017USD ($)Treasury_Lock_Agreements
Derivative [Line Items]
Long-term debt instrument, gross	$ 2,287.2
Senior Notes [Member] | 2.35% Senior Notes Due May 15, 2020 [Member]
Derivative [Line Items]
Long-term debt instrument, gross	$ 275
Debt instrument, stated interest rate	2.35%
Debt instrument, maturity date	May 15, 2020
Treasury Lock Agreements [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Number of treasury lock agreements executed | Treasury_Lock_Agreements		4
Aggregate notional value of treasury lock agreements		$ 275
Weighted-average interest rate of treasury lock agreements		2.85%

Derivative Instruments Summary

Derivative Instruments Summary of Foreign Currency Derivative Contracts (Details) MXN in Millions, $ in Millions

Jan. 17, 2017USD ($)

Apr. 29, 2016USD ($)

Jan. 15, 2016USD ($)

Jan. 15, 2015USD ($)

Dec. 31, 2017USD ($)MXN / $

Dec. 31, 2016USD ($)

Dec. 31, 2015USD ($)

Jan. 17, 2017MXNMXN / $

Jan. 17, 2017USD ($)MXN / $

Apr. 29, 2016MXNMXN / $

Apr. 29, 2016USD ($)MXN / $

Jan. 15, 2016MXNMXN / $

Jan. 15, 2016USD ($)MXN / $

Jan. 15, 2015MXNMXN / $

Jan. 15, 2015USD ($)MXN / $

Derivative [Line Items]

Cash received (paid) on settlement of foreign currency contracts

$ (10.8)

$ (58.4)

$ (5.5)

Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member]

Derivative [Line Items]

Notional amount of foreign currency contracts

MXN 6,207.7

$ 340

MXN 1,057.3

$ 60

MXN 4,480.4

$ 300

MXN 4,364.7

$ 300

Weighted-average exchange rate of foreign currency forward contracts | MXN / $

18.3

18.3

17.6

17.6

14.9

14.9

14.6

14.6

Maturity date of foreign currency contracts

Jan. 17, 2017

Apr. 29, 2016

Jan. 15, 2016

Jan. 15, 2015

Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Foreign Exchange Gain (Loss) [Member]

Derivative [Line Items]

Cash received (paid) on settlement of foreign currency contracts

$ (53)

$ 0.7

$ (49)

$ (1.2)

Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Offsetting Derivative Instrument [Member]

Derivative [Line Items]

Notional amount of foreign currency contracts

MXN 6,207.7

$ 287

MXN 1,057.3

$ 60.7

MXN 4,480.4

$ 251

MXN 4,364.7

$ 298.8

Weighted-average exchange rate of foreign currency forward contracts | MXN / $

21.6

21.6

17.4

17.4

17.9

17.9

14.6

14.6

Maturity date of foreign currency contracts

Jan. 17, 2017

Apr. 29, 2016

Jan. 15, 2016

Jan. 15, 2015

Not Designated as Hedging Instrument [Member] | Foreign Currency Zero-Cost Collar Contracts [Member]

Derivative [Line Items]

Notional amount of foreign currency contracts

$ 80

Maturity date of foreign currency contracts

Jan. 16, 2018

Not Designated as Hedging Instrument [Member] | Foreign Currency Zero-Cost Collar Contracts [Member] | Call Option [Member]

Derivative [Line Items]

Weighted-average rate outstanding options | MXN / $

21.7

Not Designated as Hedging Instrument [Member] | Foreign Currency Zero-Cost Collar Contracts [Member] | Put Option [Member]

Derivative [Line Items]

Weighted-average rate outstanding options | MXN / $

24.8

Not Designated as Hedging Instrument [Member] | Foreign Currency Zero-Cost Collar Contracts [Member] | Contracts Executed in 2017 and Settled in 2017 [Member]

Derivative [Line Items]

Notional amount of foreign currency contracts

$ 450

Not Designated as Hedging Instrument [Member] | Foreign Currency Zero-Cost Collar Contracts [Member] | Contracts Executed in 2017 and Settled in 2017 [Member] | Foreign Exchange Gain (Loss) [Member]

Derivative [Line Items]

Cash received (paid) on settlement of foreign currency contracts

$ 42.2

Not Designated as Hedging Instrument [Member] | Foreign Currency Zero-Cost Collar Contracts [Member] | Contracts Executed in 2015 and Settled in 2016 [Member]

Derivative [Line Items]

Notional amount of foreign currency contracts

80

Not Designated as Hedging Instrument [Member] | Foreign Currency Zero-Cost Collar Contracts [Member] | Contracts Executed in 2015 and Settled in 2016 [Member] | Foreign Exchange Gain (Loss) [Member]

Derivative [Line Items]

Cash received (paid) on settlement of foreign currency contracts

$ (10.1)

Not Designated as Hedging Instrument [Member] | Foreign Currency Zero-Cost Collar Contracts [Member] | Contracts Executed in 2015 and Settled in 2015 [Member]

Derivative [Line Items]

Notional amount of foreign currency contracts

50

Not Designated as Hedging Instrument [Member] | Foreign Currency Zero-Cost Collar Contracts [Member] | Contracts Executed in 2015 and Settled in 2015 [Member] | Foreign Exchange Gain (Loss) [Member]

Derivative [Line Items]

Cash received (paid) on settlement of foreign currency contracts

$ (4.3)

Derivative Instruments Fair Val

Derivative Instruments Fair Value of Derivative Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	$ 7.9	$ 0
Derivative liabilities, fair value	5.6	41.1
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	7.9	0
Derivative liabilities, fair value	0	41.1
Not Designated as Hedging Instrument [Member] | Foreign Currency Zero-Cost Collar Contracts [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	7.9	0
Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Accounts Payable and Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities, fair value	0	41.1
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities, fair value	5.6	0
Designated as Hedging Instrument [Member] | Treasury Lock Agreements [Member] | Other Noncurrent Liabilities and Deferred Credits [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities, fair value	$ 5.6	$ 0

Derivative Instruments Derivati

Derivative Instruments Derivative Instruments Affecting the Consolidated Statements of Income and Consolidated Statements of Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in OCI on Derivative	$ (5.6)	$ 0	$ 0
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Treasury Lock Agreements [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in OCI on Derivative	(5.6)	0	0
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in Income on Derivative	38.2	(53.5)	(47.2)
Not Designated as Hedging Instrument [Member] | Foreign Currency Forward Contracts [Member] | Foreign Exchange Gain (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in Income on Derivative	(11.9)	(49.6)	(36.7)
Not Designated as Hedging Instrument [Member] | Foreign Currency Zero-Cost Collar Contracts [Member] | Foreign Exchange Gain (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in Income on Derivative	$ 50.1	$ (3.9)	$ (10.5)

Short-Term Borrowings (Details)

Short-Term Borrowings (Details) - KCS [Member] - Commercial Paper [Member] - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Short-term Borrowings [Line Items]
Amount of commercial paper outstanding	$ 345.1	$ 181.3
Debt instrument, discount	$ 0.1	$ 0.1
Weighted-average interest rate of commercial paper outstanding	1.846%	1.29%

Long-Term Debt Schedule of Long

Long-Term Debt Schedule of Long-Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Feb. 21, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Long-term debt instrument, gross	$ 2,287.2
Unamortized discount and debt issuance costs	27.9	$ 30.5
Total, gross	2,302.2	2,327.4
Total	2,274.3	2,296.9
Less: Debt due within one year, gross	38.8	25.4
Unamortized discount and debt issuance costs, current	0	0
Less: Debt due within one year	38.8	25.4
Long-term debt, gross	2,263.4	2,302
Unamortized discount and debt issuance costs, noncurrent	27.9	30.5
Long-term debt	2,235.5	2,271.5
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term debt instrument, gross	0	0
Unamortized discount and debt issuance costs	0	0
Long-term debt instrument	0	0
Senior Notes [Member] | KCSR [Member]
Debt Instrument [Line Items]
Long-term debt instrument, gross	2.9	2.9
Unamortized discount and debt issuance costs	0	0
Long-term debt instrument	$ 2.9	2.9
Senior Notes [Member] | KCSR [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate	3.85%
Senior Notes [Member] | KCSR [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate	4.95%
Senior Notes [Member] | KCSM [Member]
Debt Instrument [Line Items]
Long-term debt instrument, gross	$ 28.5	28.5
Unamortized discount and debt issuance costs	0.2	0.2
Long-term debt instrument	$ 28.3	28.3
Senior Notes [Member] | KCSM [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate	2.35%
Senior Notes [Member] | KCSM [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate	3.00%
Senior Notes [Member] | KCS [Member] | 2.35% senior notes due 2020 [Member]
Debt Instrument [Line Items]
Long-term debt instrument, gross	$ 257.3	257.3
Unamortized discount and debt issuance costs	1.2	1.7
Long-term debt instrument	$ 256.1	255.6
Debt instrument, stated interest rate	2.35%
Senior Notes [Member] | KCS [Member] | 3.00% senior notes due 2023 [Member]
Debt Instrument [Line Items]
Long-term debt instrument, gross	$ 439.1	439.1
Unamortized discount and debt issuance costs	4	4.7
Long-term debt instrument	$ 435.1	434.4
Debt instrument, stated interest rate	3.00%
Senior Notes [Member] | KCS [Member] | 3.85% senior notes due 2023 [Member]
Debt Instrument [Line Items]
Long-term debt instrument, gross	$ 199.2	199.2
Unamortized discount and debt issuance costs	1.7	2
Long-term debt instrument	$ 197.5	197.2
Debt instrument, stated interest rate	3.85%
Senior Notes [Member] | KCS [Member] | 3.125% senior notes due 2026 [Member]
Debt Instrument [Line Items]
Long-term debt instrument, gross	$ 250	250
Unamortized discount and debt issuance costs	3.1	3.4
Long-term debt instrument	$ 246.9	246.6
Debt instrument, stated interest rate	3.125%
Senior Notes [Member] | KCS [Member] | 4.30% senior notes due 2043 [Member]
Debt Instrument [Line Items]
Long-term debt instrument, gross	$ 448.7	448.7
Unamortized discount and debt issuance costs	9.3	9.6
Long-term debt instrument	$ 439.4	439.1
Debt instrument, stated interest rate	4.30%
Senior Notes [Member] | KCS [Member] | 4.95% senior notes due 2045 [Member]
Debt Instrument [Line Items]
Long-term debt instrument, gross	$ 499.2	499.2
Unamortized discount and debt issuance costs	7.6	8
Long-term debt instrument	$ 491.6	491.2
Debt instrument, stated interest rate	4.95%
Secured Debt [Member] | RRIF loans due serially through 2037 [Member]
Debt Instrument [Line Items]
Long-term debt instrument, gross	$ 77.8	81.4
Unamortized discount and debt issuance costs	0.5	0.5
Long-term debt instrument	$ 77.3	80.9
Secured Debt [Member] | RRIF loans due serially through 2037 [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate	2.96%
Secured Debt [Member] | RRIF loans due serially through 2037 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate	4.29%
Secured Debt [Member] | Financing agreements due serially through 2023 [Member]
Debt Instrument [Line Items]
Long-term debt instrument, gross	$ 84.2	102.5
Unamortized discount and debt issuance costs	0.3	0.4
Long-term debt instrument	$ 83.9	102.1
Secured Debt [Member] | Financing agreements due serially through 2023 [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate	5.737%
Secured Debt [Member] | Financing agreements due serially through 2023 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate	9.31%
Secured Debt [Member] | KCSR [Member] | RRIF loans due serially through 2037 [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate			2.96%
Secured Debt [Member] | KCSM [Member] | Financing agreements due serially through 2023 [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate				5.737%
Secured Debt [Member] | KCSM [Member] | Financing agreements due serially through 2023 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate				9.31%
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Capital lease obligations	$ 15	18.3
Other Debt Obligations [Member]
Debt Instrument [Line Items]
Long-term debt instrument, gross	0.3	0.3
Unamortized discount and debt issuance costs	0	0
Long-term debt instrument	$ 0.3	$ 0.3

Long-Term Debt Revolving Credit

Long-Term Debt Revolving Credit Facility (Details) - KCS [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
KCS Commercial Paper Program [Member] | Commercial Paper [Member]
Debt Instrument [Line Items]
Commercial paper maximum borrowing capacity	$ 800
Revolving Credit Facility [Member] | KCS Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity	$ 800
Revolving credit facility maturity date	Dec. 9, 2020
Outstanding borrowings under the revolving credit facility	$ 0	$ 0
Revolving Credit Facility [Member] | KCS Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Margin KCS pays or would pay above the LIBOR	1.50%
Revolving Credit Facility [Member] | KCS Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Debt Instrument [Line Items]
Margin KCS pays or would pay above the LIBOR	1.125%
Revolving Credit Facility [Member] | KCS Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Debt Instrument [Line Items]
Margin KCS pays or would pay above the LIBOR	2.00%
Revolving Credit Facility [Member] | KCS Revolving Credit Facility [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity	$ 25

Long-Term Debt Senior Notes (De

Long-Term Debt Senior Notes (Details) - Senior Notes [Member]	12 Months Ended
	Dec. 31, 2017
Debt Instrument [Line Items]
Redemption option senior notes, price expressed as a percent of principal amount	100.00%
KCSM [Member]
Debt Instrument [Line Items]
Additional redemption option KCSM senior notes, price expressed as percent of principal amount	100.00%

Long-Term Debt RRIF Loan Agreem

Long-Term Debt RRIF Loan Agreements (Details) - Secured Debt [Member] - RRIF Loan Agreement [Member] $ in Millions	Feb. 21, 2012USD ($)locomotives	Jun. 28, 2005USD ($)
KCSR [Member]
Debt Instrument [Line Items]
Principal amount of debt	$ 54.6
Number of new locomotives acquired | locomotives	30
Debt instrument, stated interest rate	2.96%
Debt instrument, maturity date	Feb. 24, 2037
Tex Mex [Member]
Debt Instrument [Line Items]
Principal amount of debt		$ 50
Debt instrument, stated interest rate		4.29%
Debt instrument, maturity date		Jul. 13, 2030

Long-Term Debt Locomotive Finan

Long-Term Debt Locomotive Financing Agreements (Details) - Secured Debt [Member] - Financing Agreement [Member] - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2011
Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate	5.737%
Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate	9.31%
KCSM [Member]
Debt Instrument [Line Items]
Principal amount of debt		$ 216
KCSM [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate		5.737%
KCSM [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate		9.31%

Long-Term Debt Leases and Debt

Long-Term Debt Leases and Debt Maturities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Debt Disclosure [Abstract]
Rental expenses under operating leases	$ 59.5	$ 61	$ 63.9
Long-Term Debt
Long-Term Debt, Payments Due in 2018	35.2
Long-Term Debt, Payments Due in 2019	15.5
Long-Term Debt, Payments Due in 2020	299
Long-Term Debt, Payments Due in 2021	12.3
Long-Term Debt, Payments Due in 2022	12.4
Long-Term Debt, Payments Due Thereafter	1,912.8
Total Long-Term Debt	2,287.2
Capital Leases, Minimum Lease Payments
Capital Leases, Minimum Lease Payments Due in 2018	4.9
Capital Leases, Minimum Lease Payments Due in 2019	3.6
Capital Leases, Minimum Lease Payments Due in 2020	2.7
Capital Leases, Minimum Lease Payments Due in 2021	2.7
Capital Leases, Minimum Lease Payments Due in 2022	2.7
Capital Leases, Minimum Lease Payments Due Thereafter	2.5
Capital Leases, Minimum Lease Payments Total Due	19.1
Capital Leases, Minimum Interest Payments
Capital Leases, Minimum Interest Payments Due in 2018	1.3
Capital Leases, Minimum Interest Payments Due in 2019	0.9
Capital Leases, Minimum Interest Payments Due in 2020	0.8
Capital Leases, Minimum Interest Payments Due in 2021	0.6
Capital Leases, Minimum Interest Payments Due in 2022	0.4
Capital Leases, Minimum Interest Payments Due Thereafter	0.1
Capital Leases, Minimum Interest Payments Total Due	4.1
Capital Leases, Net Present Value
Capital Leases, Net Present Value Due in 2018	3.6
Capital Leases, Net Present Value Due in 2019	2.7
Capital Leases, Net Present Value Due in 2020	1.9
Capital Leases, Net Present Value Due in 2021	2.1
Capital Leases, Net Present Value Due in 2022	2.3
Capital Leases, Net Present Value Due Thereafter	2.4
Capital Leases, Net Present Value Total Due	15
Total Debt
Total Debt Due in 2018	38.8
Total Debt Due in 2019	18.2
Total Debt Due in 2020	300.9
Total Debt Due in 2021	14.4
Total Debt Due in 2022	14.7
Total Debt Due Thereafter	1,915.2
Total	2,302.2	$ 2,327.4
Operating Leases, Minimum Lease Payments
Operating Leases, Minimum Lease Payments Due in 2018	60.9
Operating Leases, Minimum Lease Payments Due in 2019	52.1
Operating Leases, Minimum Lease Payments Due in 2020	41.8
Operating Leases, Minimum Lease Payments Due in 2021	28.2
Operating Leases, Minimum Lease Payments Due in 2022	21.5
Operating Leases, Minimum Lease Payments Due Thereafter	77.2
Operating Leases, Minimum Lease Payments Total Due	281.7
Total Debt and Operating Leases
Total Debt and Operating Leases, Payments Due in 2018	99.7
Total Debt and Operating Leases, Payments Due in 2019	70.3
Total Debt and Operating Leases, Payments Due in 2020	342.7
Total Debt and Operating Leases, Payments Due in 2021	42.6
Total Debt and Operating Leases, Payments Due in 2022	36.2
Total Debt and Operating Leases, Payments Due Thereafter	1,992.4
Total Debt and Operating Leases, Payments Due Total	$ 2,583.9

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) $ in Millions	Jan. 01, 2018Provisions	Sep. 30, 2017USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Income Tax Disclosure [Line Items]
U.S. corporate income tax rate			35.00%	35.00%	35.00%
Tax benefit recognized due to change in U.S. corporate income tax rate			$ 487.6	$ 0	$ 0
Income tax expense recognized related to deemed mandatory repatriation			74.6	0	$ 0
Tax benefit recognized related to a previous uncertain tax position, as a result of lapse of statute of limitations		$ 3.7	$ 3.7	$ 1.7
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Income Tax Disclosure [Line Items]
U.S. corporate income tax rate			35.00%
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Tax Cuts and Jobs Act (Tax Reform Act) [Member]
Income Tax Disclosure [Line Items]
Tax benefit recognized due to change in U.S. corporate income tax rate			$ 487.6
Undistributed foreign earnings subject to deemed mandatory repatriation			1,479.2
Income tax expense recognized related to deemed mandatory repatriation			74.6
U.S. federal cash taxes payable on deemed mandatory repatriation			$ 44.9
Period of time over which deemed mandatory repatriation tax payments are payable			8 years
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Tax Cuts and Jobs Act (Tax Reform Act) [Member] | Subsequent Event [Member]
Income Tax Disclosure [Line Items]
U.S. corporate income tax rate	21.00%
Number of new U.S. tax base erosion provisions included in Tax Reform Act | Provisions	2
Percent dividends received deduction provided for in Tax Reform Act	100.00%
State and Local Jurisdiction [Member]
Income Tax Disclosure [Line Items]
Net operating loss carryforward, amount			$ 426.2
State and Local Jurisdiction [Member] | Minimum [Member]
Income Tax Disclosure [Line Items]
Net operating loss carryforward, period			5 years
State and Local Jurisdiction [Member] | Maximum [Member]
Income Tax Disclosure [Line Items]
Net operating loss carryforward, period			20 years
Foreign Tax Authority [Member] | Mexican Tax Authority [Member]
Income Tax Disclosure [Line Items]
Net operating loss carryforward, amount			$ 8.4

Income Taxes Schedule of Income

Income Taxes Schedule of Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current:
Federal	$ 47.3	$ 1	$ 0
State and local	0.6	0.6	0.3
Foreign	163.8	76.4	51.2
Total current	211.7	78	51.5
Deferred:
Federal	(350.1)	92.7	109.3
State and local	11.9	13.1	15.5
Foreign	36.9	(1)	11
Total deferred	(301.3)	104.8	135.8
Income tax expense (benefit)	$ (89.6)	$ 182.8	$ 187.3

Income Taxes Schedule of Inco64

Income Taxes Schedule of Income Before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
U.S.	$ 331.8	$ 279.9	$ 315
Foreign	542.5	382.8	357.6
Income before income taxes	$ 874.3	$ 662.7	$ 672.6

Income Taxes Schedule of Deferr

Income Taxes Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Assets:
Tax credit and loss carryovers	$ 26.9	$ 70.7
Reserves not currently deductible for tax	54.1	106.4
Other	25.2	31.6
Gross deferred tax assets before valuation allowance	106.2	208.7
Valuation allowance	(2.1)	(1.7)
Net deferred tax assets	104.1	207
Liabilities:
Property	(1,012.7)	(1,389)
Investments	(48)	(73.8)
Other	(30.6)	(33.5)
Gross deferred tax liabilities	(1,091.3)	(1,496.3)
Net deferred tax liability	$ (987.2)	$ (1,289.3)

Income Taxes Schedule of Effect

Income Taxes Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income tax expense using the statutory rate in effect		$ 306	$ 231.9	$ 235.4
Tax effect of:
Difference between U.S. and foreign tax rate		(25.1)	(17.4)	(17.8)
Foreign exchange	[1]	31.6	(45)	(40.5)
State and local income tax provision, net		8.3	8.1	10.3
Change in U.S. tax rate		(487.6)	0	0
Deemed mandatory repatriation		74.6	0	0
Other, net		2.6	5.2	(0.1)
Income tax expense (benefit)		$ (89.6)	$ 182.8	$ 187.3
U.S. federal statutory income tax rate		35.00%	35.00%	35.00%
Tax rate effect of:
Difference between U.S. and foreign tax rate		(2.90%)	(2.60%)	(2.60%)
Foreign exchange	[1]	3.60%	(6.80%)	(6.10%)
State and local income tax provision, net		1.00%	1.20%	1.50%
Change in U.S. tax rate		(55.80%)	0.00%	0.00%
Deemed mandatory repatriation		8.60%	0.00%	0.00%
Other, net		0.30%	0.80%	0.00%
Effective income tax rate		(10.20%)	27.60%	27.80%
[1]	Mexican income taxes are paid in Mexican pesos, and as a result, the effective income tax rate reflects fluctuations in the value of the Mexican peso against the U.S. dollar. The foreign exchange impact on income taxes includes the gain or loss from the revaluation of the Company’s net U.S. dollar-denominated monetary liabilities into Mexican pesos which is included in Mexican taxable income under Mexican tax law. As a result, a strengthening of the Mexican peso against the U.S. dollar for the reporting period will generally increase the Mexican cash tax obligation and the effective income tax rate, and a weakening of the Mexican peso against the U.S. dollar for the reporting period will generally decrease the Mexican cash tax obligation and the effective tax rate. To hedge its exposure to this cash tax risk, the Company enters into foreign currency derivative contracts, which are measured at fair value each period and any change in fair value is recognized in foreign exchange gain (loss) within the consolidated statements of income.

Income Taxes Uncertain Tax Posi

Income Taxes Uncertain Tax Positions (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of Unrecognized Tax Benefits [Rollforward]
Balance at January 1,		$ 3.8	$ 1.7
Additions based on tax positions related to the current year		0	1.3
Additions for tax positions of prior years		0	2.5
Reductions for tax positions of prior years		(0.1)	0
Reductions as a result of lapse of statute of limitations	$ (3.7)	(3.7)	(1.7)
Balance at December 31,		$ 0	$ 3.8

Stockholders' Equity Capital St

Stockholders' Equity Capital Stock Shares Authorized, Issued and Outstanding (Details) - shares	Dec. 31, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Common Stock, Shares Authorized	400,000,000	400,000,000
Common Stock, Shares Issued	123,352,185	123,352,185
Common Stock, Shares Outstanding	103,036,805	106,606,619
$25 Par Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	840,000	840,000
Preferred Stock, Shares Issued	649,736	649,736
Preferred Stock, Shares Outstanding	242,170	242,170
$1 Par Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	2,000,000	2,000,000
Preferred Stock, Shares Issued	0	0

Stockholders' Equity (Details)

Stockholders' Equity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Class of Stock [Line Items]
Common Stock, Par Value	$ 0.01	$ 0.01
$25 Par Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Par Value	$ 25	$ 25	$ 25
Preferred Stock, Dividend Rate	4.00%	4.00%
$1 Par Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Par Value	$ 1	$ 1

Stockholders' Equity Share Repu

Stockholders' Equity Share Repurchase Program (Details) $ / shares in Units, $ in Millions	1 Months Ended	6 Months Ended	12 Months Ended
	Aug. 31, 2017USD ($)	Dec. 31, 2017USD ($)agreements$ / sharesshares	Dec. 31, 2017USD ($)$ / sharesshares	Dec. 31, 2016USD ($)shares	Dec. 31, 2015USD ($)shares	May 31, 2015USD ($)
Equity, Class of Treasury Stock [Line Items]
Shares repurchased (shares) | shares			3,759,678	2,127,612	2,133,984
Shares repurchased			$ 375.6	$ 185.4	$ 194.2
Average price of shares repurchased | $ / shares			$ 99.90
2015 Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Maximum amount of share repurchase program						$ 500
Shares repurchased (shares) | shares			1,340,209
Shares repurchased			$ 120.4
Average price of shares repurchased | $ / shares			$ 89.83
2017 Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Maximum amount of share repurchase program	$ 800
Expiration date of share repurchase program	Jun. 30, 2020
Shares repurchased (shares) | shares			2,419,469
Shares repurchased			$ 255.2
Average price of shares repurchased | $ / shares			$ 105.48
2017 Share Repurchase Program [Member] | Accelerated Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Maximum amount of share repurchase program	$ 200
Number of ASR agreements entered into and settled by the Company | agreements		2
Shares repurchased (shares) | shares		1,901,769
Shares repurchased		$ 200
Average price of shares repurchased | $ / shares		$ 105.17

Stockholders' Equity Treasury S

Stockholders' Equity Treasury Stock (Details) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Equity, Class of Treasury Stock [Line Items]
Balance at beginning of year	16,745,566	14,891,041	12,959,855
Shares repurchased	3,759,678	2,127,612	2,133,984
Shares issued to fund stock option exercises	(9,110)	(15,264)	(89,035)
Employee stock purchase plan shares issued	(76,401)	(82,372)	(52,736)
Nonvested shares issued	(124,519)	(179,309)	(62,936)
Nonvested shares forfeited	20,166	3,858	1,909
Balance at end of year	20,315,380	16,745,566	14,891,041

Stockholders' Equity Cash Divid

Stockholders' Equity Cash Dividends on Common Stock (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Equity [Abstract]
Cash dividends declared per common share	$ 1.38	$ 1.32	$ 1.32

Share-Based Compensation (Narra

Share-Based Compensation (Narrative) (Details)	Dec. 31, 2017shares
2017 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	3,750,000

Share-Based Compensation, Stock

Share-Based Compensation, Stock Options (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Exercised, number of shares	(9,110)	(15,264)	(89,035)
Cash received from option exercises	$ 0.7	$ 0.9	$ 4.2
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Contractual term (years)	10 years
Expected dividend yield	1.52%	1.60%	0.94%
Expected volatility	30.74%	32.29%	37.11%
Risk-free interest rate	2.20%	1.51%	1.82%
Expected term (years)	6 years	6 years	6 years
Weighted-average grant date fair value of stock options granted	$ 24.49	$ 22.98	$ 41.49
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding, number of shares, beginning of period	414,803
Options, weighted-average exercise price per share, beginning of period	$ 76.87
Granted, number of shares	97,090
Granted, weighted-average exercise price	$ 87.11
Exercised, number of shares	(9,110)
Exercised, weighted-average exercise price per share	$ 80.32
Forfeited or expired, number of shares	(2,159)
Forfeited or expired, weighted-average exercise price per share	$ 88.35
Options outstanding, number of shares, end of period	500,624	414,803
Options, weighted-average exercise price per share, end of period	$ 78.74	$ 76.87
Options outstanding, weighted-average remaining contractual term	6 years 1 month
Options outstanding, aggregate intrinsic value	$ 14
Exercisable, number of shares	339,711
Exercisable, weighted-average exercise price per share	$ 74.33
Exercisable, weighted-average remaining contractual term	5 years
Exercisable, aggregate intrinsic value	$ 11
Compensation expense	2.3	$ 2.5	$ 2
Income tax benefit recognized in the income statement	0.8	0.9	0.7
Aggregate grant-date fair value of stock options vested	2.8	1.8	2
Intrinsic value of stock options exercised	0.2	0.6	6.1
Cash received from option exercises	0.7	0.9	4.2
Tax benefit from options exercised during the annual period	0.1	$ 0.2	$ 2.3
Unrecognized compensation cost relating to nonvested stock options	$ 1.2
Unrecognized compensation cost weighted-average period of recognition	1 year
Shares available for future grants	3,694,802

Share-Based Compensation, Nonve

Share-Based Compensation, Nonvested Stock (Details) $ / shares in Units, $ in Millions	Feb. 19, 2016$ / sharesdaysTranchesshares	Dec. 31, 2017USD ($)$ / sharesshares	Dec. 31, 2016USD ($)$ / sharesshares	Dec. 31, 2015USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Forfeited, number of shares | shares		(20,166)	(3,858)	(1,909)
Nonvested Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested stock, number of shares, beginning of period | shares		238,010
Nonvested stock, weighted-average grant date fair value, beginning of period		$ 91.55
Granted, number of shares | shares		121,307
Granted, weighted-average grant date fair value		$ 93.29	$ 80.92	$ 112.03
Vested, number of shares | shares		(62,472)
Vested, weighted-average grant date fair value		$ 87.51
Forfeited, number of shares | shares		(20,166)
Forfeited, weighted-average grant date fair value		$ 90.83
Nonvested stock, number of shares, end of period | shares		276,679	238,010
Nonvested stock, weighted-average grant date fair value, end of period		$ 93.28	$ 91.55
Nonvested stock, aggregate intrinsic value | $		$ 29.1
Shares vested, fair value | $		5.9	$ 7	$ 6.4
Compensation expense | $		9.3	9.6	5.1
Income tax benefit recognized in the income statement | $		3.5	$ 3.5	$ 1.9
Unrecognized compensation cost relating to nonvested stock | $		$ 13.6
Unrecognized compensation cost weighted-average period of recognition		1 year 5 months
Nonvested Stock [Member] | Minimum [Member] | Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Nonvested Stock [Member] | Maximum [Member] | Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		5 years
Market-based Award [Member] | Nonvested Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield			1.58%
Expected volatility			31.68%
Risk-free interest rate, minimum			0.53%
Risk-free interest rate, maximum			1.89%
Expected term (years)			1 year 10 months 10 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Granted, number of shares | shares	66,320
Granted, weighted-average grant date fair value			$ 70.95
Number of tranches | Tranches	3
Market condition, number of trading days | days	20
Target price number one	84.14
Target price number two	91.79
Target price number three	99.44

Share-Based Compensation, Perfo

Share-Based Compensation, Performance Based Awards (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Forfeited, number of shares		(20,166)	(3,858)	(1,909)
Performance Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period		3 years
OR and ROIC performance period		3 years
Revenue growth multiplier performance period		3 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested stock, number of shares, beginning of period	[1]	144,399
Nonvested stock, weighted-average grant date fair value, beginning of period		$ 97.08
Granted, number of shares	[1]	54,588
Granted, weighted-average grant date fair value		$ 87.09	$ 82.71	$ 119.35
Vested, number of shares	[1]	(36,323)
Vested, weighted-average grant date fair value		$ 94.23
Forfeited, number of shares	[1]	(23,162)
Forfeited, weighted-average grant date fair value		$ 102.30
Nonvested stock, number of shares, end of period	[1]	139,502	144,399
Nonvested stock, weighted-average grant date fair value, end of period		$ 93.05	$ 97.08
Compensation expense		$ 6	$ 5.7	$ 3
Income tax benefit recognized in the income statement		2.2	$ 2.1	$ 1.1
Unrecognized compensation cost relating to nonvested stock		$ 5.6
Unrecognized compensation cost weighted-average period of recognition		11 months
Shares vested, fair value		$ 3.2
Performance Based Awards [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Revenue growth multiplier range		80.00%
Performance based award, earned percentage		0.00%
Performance Based Awards [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Revenue growth multiplier range		140.00%
Performance based award, earned percentage		200.00%
2017 Awards [Member] | Performance Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Maximum number of shares		107,888
2016 Awards [Member] | Performance Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Maximum number of shares		105,320
2015 Awards [Member] | Performance Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Earned shares		21,397
[1]	* For the 2017 Awards and the 2016 Awards, participants in the aggregate can earn up to a maximum of 107,888 and 105,320 shares, respectively. For the 2015 Awards, the performance shares earned were 21,397.

Share-Based Compensation, Emplo

Share-Based Compensation, Employee Stock Purchase Plan (Details) - USD ($) $ / shares in Units, $ in Millions		6 Months Ended						12 Months Ended
		Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercised, shares issued								76,401	82,372	52,736
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized		4,000,000						4,000,000
Maximum employee contribution rate		10.00%						10.00%
Employee stock purchase plan, purchase price								85.00%
Expected dividend yield								1.47%	1.65%	1.20%
Expected volatility								17.09%	23.84%	17.00%
Risk-free interest rate								0.89%	0.46%	0.10%
Expected term (years)								6 months	6 months	6 months
Weighted-average grant date fair value								$ 17.90	$ 17.29	$ 20.55
Compensation expense								$ 1.3	$ 1.4	$ 1.3
Shares available for future grants		3,500,000						3,500,000
July 2017 offering ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercised, purchase price		$ 89.18
Exercised, shares issued		30,595
Proceeds received from employees	[1]	$ 2.7
January 2017 offering ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercised, purchase price			$ 68.70
Exercised, shares issued			40,293
Proceeds received from employees	[1]		$ 2.8
July 2016 offering ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercised, purchase price				$ 72.12
Exercised, shares issued				36,108
Proceeds received from employees	[1]			$ 2.6
January 2016 offering ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercised, purchase price					$ 62.66
Exercised, shares issued					41,895
Proceeds received from employees	[1]				$ 2.6
July 2015 offering ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercised, purchase price						$ 63.47
Exercised, shares issued						40,477
Proceeds received from employees	[1]					$ 2.6
January 2015 offering ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercised, purchase price							$ 77.52
Exercised, shares issued							35,097
Proceeds received from employees	[1]						$ 2.7
[1]	Represents amounts received from employees through payroll deductions for share purchases under applicable offering.

Commitments and Contingencies78

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financial Guarantee [Member]
Loss Contingencies [Line Items]
Letter of credit outstanding, amount	$ 5.5
Percent guarantee of unconsolidated affiliate debt	50.00%
KCSM [Member]
Loss Contingencies [Line Items]
Total period of time for payments due under railroad Concession to Mexican government	50 years
Percentage of gross revenue payable under railroad Concession to Mexican government	1.25%
KCSM [Member] | Materials and Other Expense [Member]
Loss Contingencies [Line Items]
Concession duty expense	$ 17	$ 14.9	$ 15.4
Panama Canal Railway Company [Member] | Financial Guarantee [Member] | 7.0% Senior Secured Notes due November 1, 2026 [Member]
Loss Contingencies [Line Items]
Debt instrument, stated interest rate	7.00%
Debt instrument, maturity date	Nov. 1, 2026

Commitments and Contingencies P

Commitments and Contingencies Personal Injury Liability Activity (Details) - Personal Injury [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Personal Injury Liability Activity [Roll Forward]
Balance at beginning of year	$ 23.8	$ 23.9
Accruals	4.8	4.8
Changes in estimate	(3.6)	(1.1)
Payments	(5.7)	(3.8)
Balance at end of year	$ 19.3	$ 23.8

Quarterly Financial Data (Una80

Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended															12 Months Ended
	Dec. 31, 2017		Sep. 30, 2017		Jun. 30, 2017		Mar. 31, 2017		Dec. 31, 2016		Sep. 30, 2016		Jun. 30, 2016		Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Data [Abstract]
Revenues	$ 660.4		$ 656.6		$ 656.4		$ 609.5		$ 598.5		$ 604.5		$ 568.5		$ 562.7	$ 2,582.9	$ 2,334.2	$ 2,418.8
Operating income	237.8	[1]	233.8	[1]	239.3	[1]	210.7	[1]	210.9	[2]	199.8	[2]	219.9	[2]	187.9	921.6	818.5	803.8
Net income	552.4	[3]	129.9		134.7		146.9		130.3		121		120.5		108.1	963.9	479.9	485.3
Net income attributable to Kansas City Southern and subsidiaries	$ 551.7		$ 129.3		$ 134.4		$ 146.6		$ 129.6		$ 120.6		$ 120.1		$ 107.8	$ 962	$ 478.1	$ 483.5
Per share data:
Basic earnings per common share	$ 5.35		$ 1.24		$ 1.27		$ 1.38		$ 1.21		$ 1.12		$ 1.12		$ 1	$ 9.18	$ 4.44	$ 4.41
Diluted earnings per common share	$ 5.33		$ 1.23		$ 1.27		$ 1.38		$ 1.21		$ 1.12		$ 1.11		$ 0.99	$ 9.16	$ 4.43	$ 4.40
Mexican fuel excise tax credit	$ 8.5		$ 11.1		$ 12.8		$ 11.7		$ 13.2		$ 15.6		$ 34			$ 44.1	$ 62.8	$ 0
Net tax benefit as a result of the Tax Reform Act	$ 413
[1]	During the first, second, third and fourth quarters of 2017, the Company recognized an $11.7 million, $12.8 million, $11.1 million and $8.5 million benefit, respectively, related to a credit available for the excise tax included in the price of fuel that is purchased and consumed in locomotives and certain work equipment in Mexico.
[2]	During the second, third and fourth quarters of 2016, the Company recognized a $34.0 million, $15.6 million and $13.2 million benefit, respectively, related to a credit available for the excise tax included in the price of fuel that is purchased and consumed in locomotives and certain work equipment in Mexico.
[3]	During the fourth quarter of 2017, the Company recognized a $413.0 million net tax benefit as a result of the Tax Reform Act, which was signed into law December 22, 2017.

Geographic Information (Informa

Geographic Information (Information by Geographic Area) (Details) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017USD ($)	Sep. 30, 2017USD ($)	Jun. 30, 2017USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Sep. 30, 2016USD ($)	Jun. 30, 2016USD ($)	Mar. 31, 2016USD ($)	Dec. 31, 2017USD ($)Segments	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of reportable business segments of the Company | Segments									1
Revenues	$ 660.4	$ 656.6	$ 656.4	$ 609.5	$ 598.5	$ 604.5	$ 568.5	$ 562.7	$ 2,582.9	$ 2,334.2	$ 2,418.8
Property and equipment (including concession assets), net	8,403.8				8,069.7				8,403.8	8,069.7
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									1,359.5	1,210.8	1,248.4
Property and equipment (including concession assets), net	5,227.3				4,960.6				5,227.3	4,960.6
MEXICO
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									1,223.4	1,123.4	$ 1,170.4
Property and equipment (including concession assets), net	$ 3,176.5				$ 3,109.1				$ 3,176.5	$ 3,109.1

Subsequent Events (Details)

Subsequent Events (Details) $ / shares in Units, $ in Millions	Jan. 23, 2018USD ($)$ / shares	Jan. 26, 2018USD ($)MXN / $	Dec. 31, 2017USD ($)$ / sharesMXN / $	Dec. 31, 2016USD ($)$ / shares	Dec. 31, 2015USD ($)$ / shares
Foreign Currency Hedging [Abstract]
Cash received (paid) on settlement of foreign currency contracts			$ (10.8)	$ (58.4)	$ (5.5)
Common Stock Dividend [Abstract]
Cash dividends declared per common share | $ / shares			$ 1.38	$ 1.32	$ 1.32
Aggregate amount of dividends on common stock			$ 144.2	$ 141.9	$ 144.8
Subsequent Event [Member]
Common Stock Dividend [Abstract]
Cash dividends declared per common share | $ / shares	$ 0.36
Aggregate amount of dividends on common stock	$ 37.1
Not Designated as Hedging Instrument [Member] | Foreign Currency Zero-Cost Collar Contracts [Member]
Foreign Currency Hedging [Abstract]
Notional amount of foreign currency contracts			$ 80
Not Designated as Hedging Instrument [Member] | Foreign Currency Zero-Cost Collar Contracts [Member] | Call Option [Member]
Foreign Currency Hedging [Abstract]
Weighted-average rate of foreign currency zero-cost collar contracts | MXN / $			21.7
Not Designated as Hedging Instrument [Member] | Foreign Currency Zero-Cost Collar Contracts [Member] | Put Option [Member]
Foreign Currency Hedging [Abstract]
Weighted-average rate of foreign currency zero-cost collar contracts | MXN / $			24.8
Not Designated as Hedging Instrument [Member] | Foreign Currency Zero-Cost Collar Contracts [Member] | Subsequent Event [Member]
Foreign Currency Hedging [Abstract]
Notional amount of foreign currency contracts		$ 340
Not Designated as Hedging Instrument [Member] | Foreign Currency Zero-Cost Collar Contracts [Member] | Subsequent Event [Member] | Call Option [Member]
Foreign Currency Hedging [Abstract]
Weighted-average rate of foreign currency zero-cost collar contracts | MXN / $		19.23
Not Designated as Hedging Instrument [Member] | Foreign Currency Zero-Cost Collar Contracts [Member] | Subsequent Event [Member] | Put Option [Member]
Foreign Currency Hedging [Abstract]
Weighted-average rate of foreign currency zero-cost collar contracts | MXN / $		21.45
Not Designated as Hedging Instrument [Member] | Foreign Currency Zero-Cost Collar Contracts [Member] | Foreign Exchange Gain (Loss) [Member] | Subsequent Event [Member]
Foreign Currency Hedging [Abstract]
Cash received (paid) on settlement of foreign currency contracts		$ 10

Condensed Consolidating Finan83

Condensed Consolidating Financial Information (Narrative) (Details) $ in Millions	Dec. 31, 2017USD ($)
Condensed Financial Statements, Captions [Line Items]
Outstanding principal amount of the senior notes	$ 2,287.2
Condensed Consolidating Financial Information KCS [Member] | KCS [Member] | Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Outstanding principal amount of the senior notes	2,093.5
Condensed Consolidating Financial Information KCSR [Member] | KCSR [Member] | Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Outstanding principal amount of the senior notes	$ 2.9

Condensed Consolidating Stateme

Condensed Consolidating Statements of Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended															12 Months Ended
	Dec. 31, 2017		Sep. 30, 2017		Jun. 30, 2017		Mar. 31, 2017		Dec. 31, 2016		Sep. 30, 2016		Jun. 30, 2016		Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Condensed Statements of Comprehensive Income Captions [Line Items]
Revenues	$ 660.4		$ 656.6		$ 656.4		$ 609.5		$ 598.5		$ 604.5		$ 568.5		$ 562.7	$ 2,582.9	$ 2,334.2	$ 2,418.8
Operating expenses																1,661.3	1,515.7	1,615
Operating income	237.8	[1]	233.8	[1]	239.3	[1]	210.7	[1]	210.9	[2]	199.8	[2]	219.9	[2]	187.9	921.6	818.5	803.8
Equity in net earnings (losses) of affiliates																11.5	14.6	18.3
Interest expense																(100.2)	(97.7)	(81.9)
Debt retirement and exchange costs																0	0	(7.6)
Foreign exchange gain (loss)																41.7	(72)	(56.6)
Other income (expense), net																(0.3)	(0.7)	(3.4)
Income before income taxes																874.3	662.7	672.6
Income tax expense (benefit)																(89.6)	182.8	187.3
Net income	552.4	[3]	129.9		134.7		146.9		130.3		121		120.5		108.1	963.9	479.9	485.3
Less: Net income attributable to noncontrolling interest																1.9	1.8	1.8
Net income attributable to Kansas City Southern and subsidiaries	$ 551.7		$ 129.3		$ 134.4		$ 146.6		$ 129.6		$ 120.6		$ 120.1		$ 107.8	962	478.1	483.5
Other comprehensive income (loss)																(6.7)	(1.5)	(1.5)
Comprehensive income attributable to Kansas City Southern and subsidiaries																955.3	476.6	482
Condensed Consolidating Financial Information KCS [Member] | Consolidating Adjustments [Member]
Condensed Statements of Comprehensive Income Captions [Line Items]
Revenues																(20.8)	(19.6)	(19.4)
Operating expenses																(17.6)	(17.7)	(18.6)
Operating income																(3.2)	(1.9)	(0.8)
Equity in net earnings (losses) of affiliates																(979.3)	(471.9)	(467.8)
Interest expense																87.7	130.3	47.7
Debt retirement and exchange costs																0	0	0
Foreign exchange gain (loss)																0	0	0
Other income (expense), net																(87.6)	(129)	(47.6)
Income before income taxes																(982.4)	(472.5)	(468.5)
Income tax expense (benefit)																(0.6)	(0.9)	0
Net income																(981.8)	(471.6)	(468.5)
Less: Net income attributable to noncontrolling interest																0	0	0
Net income attributable to Kansas City Southern and subsidiaries																(981.8)	(471.6)	(468.5)
Other comprehensive income (loss)																(0.5)	2.5	2.2
Comprehensive income attributable to Kansas City Southern and subsidiaries																(982.3)	(469.1)	(466.3)
Condensed Consolidating Financial Information KCS [Member] | Parent [Member]
Condensed Statements of Comprehensive Income Captions [Line Items]
Revenues																0	0	0
Operating expenses																5.7	4.7	4.6
Operating income																(5.7)	(4.7)	(4.6)
Equity in net earnings (losses) of affiliates																974.8	468.5	464
Interest expense																(81.3)	(81.9)	(4.6)
Debt retirement and exchange costs																0	0	0.1
Foreign exchange gain (loss)																0	0	0
Other income (expense), net																86.7	104.4	45.9
Income before income taxes																974.5	486.3	500.8
Income tax expense (benefit)																9.9	7.1	16.5
Net income																964.6	479.2	484.3
Less: Net income attributable to noncontrolling interest																0	0	0
Net income attributable to Kansas City Southern and subsidiaries																964.6	479.2	484.3
Other comprehensive income (loss)																(6.7)	(1.5)	(1.5)
Comprehensive income attributable to Kansas City Southern and subsidiaries																957.9	477.7	482.8
Condensed Consolidating Financial Information KCS [Member] | Guarantor Subsidiaries [Member]
Condensed Statements of Comprehensive Income Captions [Line Items]
Revenues																1,244.7	1,101.3	1,135.9
Operating expenses																882.2	794.7	779.7
Operating income																362.5	306.6	356.2
Equity in net earnings (losses) of affiliates																6.4	5.3	5.6
Interest expense																(72.2)	(83)	(84.9)
Debt retirement and exchange costs																0	0	(5.2)
Foreign exchange gain (loss)																0	0	0
Other income (expense), net																(0.6)	(0.2)	(3.1)
Income before income taxes																296.1	228.7	268.6
Income tax expense (benefit)																(353.1)	87.4	98.3
Net income																649.2	141.3	170.3
Less: Net income attributable to noncontrolling interest																0	0	0
Net income attributable to Kansas City Southern and subsidiaries																649.2	141.3	170.3
Other comprehensive income (loss)																0	0	0
Comprehensive income attributable to Kansas City Southern and subsidiaries																649.2	141.3	170.3
Condensed Consolidating Financial Information KCS [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Statements of Comprehensive Income Captions [Line Items]
Revenues																1,359	1,252.5	1,302.3
Operating expenses																791	734	849.3
Operating income																568	518.5	453
Equity in net earnings (losses) of affiliates																9.6	12.7	16.5
Interest expense																(34.4)	(63.1)	(40.1)
Debt retirement and exchange costs																0	0	(2.5)
Foreign exchange gain (loss)																41.7	(72)	(56.6)
Other income (expense), net																1.2	24.1	1.4
Income before income taxes																586.1	420.2	371.7
Income tax expense (benefit)																254.2	89.2	72.5
Net income																331.9	331	299.2
Less: Net income attributable to noncontrolling interest																1.9	1.8	1.8
Net income attributable to Kansas City Southern and subsidiaries																330	329.2	297.4
Other comprehensive income (loss)																0.5	(2.5)	(2.2)
Comprehensive income attributable to Kansas City Southern and subsidiaries																330.5	326.7	295.2
Condensed Consolidating Financial Information KCSR [Member] | Consolidating Adjustments [Member]
Condensed Statements of Comprehensive Income Captions [Line Items]
Revenues																(40.4)	(39.3)	(38.1)
Operating expenses																(37.3)	(37.4)	(37.3)
Operating income																(3.1)	(1.9)	(0.8)
Equity in net earnings (losses) of affiliates																(996.4)	(469.9)	(464.5)
Interest expense																87.7	130.3	47.7
Debt retirement and exchange costs																0	0	0
Foreign exchange gain (loss)																0	0	0
Other income (expense), net																(87.6)	(129)	(47.6)
Income before income taxes																(999.4)	(470.5)	(465.2)
Income tax expense (benefit)																(0.6)	(0.9)	0
Net income																(998.8)	(469.6)	(465.2)
Less: Net income attributable to noncontrolling interest																0	0	0
Net income attributable to Kansas City Southern and subsidiaries																(998.8)	(469.6)	(465.2)
Other comprehensive income (loss)																(0.5)	2.5	2.2
Comprehensive income attributable to Kansas City Southern and subsidiaries																(999.3)	(467.1)	(463)
Condensed Consolidating Financial Information KCSR [Member] | Parent [Member]
Condensed Statements of Comprehensive Income Captions [Line Items]
Revenues																0	0	0
Operating expenses																5.7	4.7	4.6
Operating income																(5.7)	(4.7)	(4.6)
Equity in net earnings (losses) of affiliates																974.8	468.5	464
Interest expense																(81.3)	(81.9)	(4.6)
Debt retirement and exchange costs																0	0	0.1
Foreign exchange gain (loss)																0	0	0
Other income (expense), net																86.7	104.4	45.9
Income before income taxes																974.5	486.3	500.8
Income tax expense (benefit)																9.9	7.1	16.5
Net income																964.6	479.2	484.3
Less: Net income attributable to noncontrolling interest																0	0	0
Net income attributable to Kansas City Southern and subsidiaries																964.6	479.2	484.3
Other comprehensive income (loss)																(6.7)	(1.5)	(1.5)
Comprehensive income attributable to Kansas City Southern and subsidiaries																957.9	477.7	482.8
Condensed Consolidating Financial Information KCSR [Member] | KCSR [Member]
Condensed Statements of Comprehensive Income Captions [Line Items]
Revenues																1,220.8	1,077.3	1,112.5
Operating expenses																862.8	776.3	760.4
Operating income																358	301	352.1
Equity in net earnings (losses) of affiliates																19	(0.2)	(1.4)
Interest expense																(72.2)	(83)	(84.8)
Debt retirement and exchange costs																0	0	(5.2)
Foreign exchange gain (loss)																0	0	0
Other income (expense), net																(0.6)	(0.2)	(3.2)
Income before income taxes																304.2	217.6	257.5
Income tax expense (benefit)																(310.6)	84.3	95.2
Net income																614.8	133.3	162.3
Less: Net income attributable to noncontrolling interest																0	0	0
Net income attributable to Kansas City Southern and subsidiaries																614.8	133.3	162.3
Other comprehensive income (loss)																0	0	0
Comprehensive income attributable to Kansas City Southern and subsidiaries																614.8	133.3	162.3
Condensed Consolidating Financial Information KCSR [Member] | Guarantor Subsidiaries [Member]
Condensed Statements of Comprehensive Income Captions [Line Items]
Revenues																43.5	43.7	42.1
Operating expenses																39.1	38.1	38
Operating income																4.4	5.6	4.1
Equity in net earnings (losses) of affiliates																4.5	3.5	3.7
Interest expense																0	0	(0.1)
Debt retirement and exchange costs																0	0	0
Foreign exchange gain (loss)																0	0	0
Other income (expense), net																0	0	0.1
Income before income taxes																8.9	9.1	7.8
Income tax expense (benefit)																(42.5)	3.1	3.1
Net income																51.4	6	4.7
Less: Net income attributable to noncontrolling interest																0	0	0
Net income attributable to Kansas City Southern and subsidiaries																51.4	6	4.7
Other comprehensive income (loss)																0	0	0
Comprehensive income attributable to Kansas City Southern and subsidiaries																51.4	6	4.7
Condensed Consolidating Financial Information KCSR [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Statements of Comprehensive Income Captions [Line Items]
Revenues																1,359	1,252.5	1,302.3
Operating expenses																791	734	849.3
Operating income																568	518.5	453
Equity in net earnings (losses) of affiliates																9.6	12.7	16.5
Interest expense																(34.4)	(63.1)	(40.1)
Debt retirement and exchange costs																0	0	(2.5)
Foreign exchange gain (loss)																41.7	(72)	(56.6)
Other income (expense), net																1.2	24.1	1.4
Income before income taxes																586.1	420.2	371.7
Income tax expense (benefit)																254.2	89.2	72.5
Net income																331.9	331	299.2
Less: Net income attributable to noncontrolling interest																1.9	1.8	1.8
Net income attributable to Kansas City Southern and subsidiaries																330	329.2	297.4
Other comprehensive income (loss)																0.5	(2.5)	(2.2)
Comprehensive income attributable to Kansas City Southern and subsidiaries																$ 330.5	$ 326.7	$ 295.2
[1]	During the first, second, third and fourth quarters of 2017, the Company recognized an $11.7 million, $12.8 million, $11.1 million and $8.5 million benefit, respectively, related to a credit available for the excise tax included in the price of fuel that is purchased and consumed in locomotives and certain work equipment in Mexico.
[2]	During the second, third and fourth quarters of 2016, the Company recognized a $34.0 million, $15.6 million and $13.2 million benefit, respectively, related to a credit available for the excise tax included in the price of fuel that is purchased and consumed in locomotives and certain work equipment in Mexico.
[3]	During the fourth quarter of 2017, the Company recognized a $413.0 million net tax benefit as a result of the Tax Reform Act, which was signed into law December 22, 2017.

Condensed Consolidating Balance

Condensed Consolidating Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Assets:
Current assets	$ 680.1	$ 648
Investments	44.6	32.9
Investments in consolidated subsidiaries	0	0
Property and equipment (including concession assets), net	8,403.8	8,069.7
Other assets	70.2	66.9
Total assets	9,198.7	8,817.5
Liabilities and equity:
Current liabilities	971.7	744.4
Long-term debt	2,235.5	2,271.5
Deferred income taxes	987.2	1,289.3
Other liabilities	138.9	107.8
Stockholders’ equity	4,548.9	4,089.9
Noncontrolling interest	316.5	314.6
Total liabilities and equity	9,198.7	8,817.5
Condensed Consolidating Financial Information KCS [Member] | Consolidating Adjustments [Member]
Assets:
Current assets	(310.3)	(35.3)
Investments	0	0
Investments in consolidated subsidiaries	(4,646.6)	(3,676.8)
Property and equipment (including concession assets), net	(5.9)	(2.7)
Other assets	(2,388.7)	(2,996.6)
Total assets	(7,351.5)	(6,711.4)
Liabilities and equity:
Current liabilities	(311.8)	(36.7)
Long-term debt	(2,388.8)	(2,996.6)
Deferred income taxes	(1.5)	(0.9)
Other liabilities	0	0
Stockholders’ equity	(4,649.4)	(3,677.2)
Noncontrolling interest	0	0
Total liabilities and equity	(7,351.5)	(6,711.4)
Condensed Consolidating Financial Information KCS [Member] | Parent [Member]
Assets:
Current assets	292	18.3
Investments	0	0
Investments in consolidated subsidiaries	4,462.4	3,497.7
Property and equipment (including concession assets), net	0	0
Other assets	2,159.6	2,767.9
Total assets	6,914	6,283.9
Liabilities and equity:
Current liabilities	277.9	87.3
Long-term debt	2,066.8	2,064.3
Deferred income taxes	(7.1)	26.9
Other liabilities	13.5	4
Stockholders’ equity	4,562.9	4,101.4
Noncontrolling interest	0	0
Total liabilities and equity	6,914	6,283.9
Condensed Consolidating Financial Information KCS [Member] | Guarantor Subsidiaries [Member]
Assets:
Current assets	222.9	275.4
Investments	3.9	3.9
Investments in consolidated subsidiaries	184.2	179.1
Property and equipment (including concession assets), net	4,454.8	4,203.6
Other assets	46.8	43
Total assets	4,912.6	4,705
Liabilities and equity:
Current liabilities	673.6	432.8
Long-term debt	1,517.2	1,928.9
Deferred income taxes	818.8	1,075.3
Other liabilities	70.3	86.3
Stockholders’ equity	1,832.7	1,181.7
Noncontrolling interest	0	0
Total liabilities and equity	4,912.6	4,705
Condensed Consolidating Financial Information KCS [Member] | Non-Guarantor Subsidiaries [Member]
Assets:
Current assets	475.5	389.6
Investments	40.7	29
Investments in consolidated subsidiaries	0	0
Property and equipment (including concession assets), net	3,954.9	3,868.8
Other assets	252.5	252.6
Total assets	4,723.6	4,540
Liabilities and equity:
Current liabilities	332	261
Long-term debt	1,040.3	1,274.9
Deferred income taxes	177	188
Other liabilities	55.1	17.5
Stockholders’ equity	2,802.7	2,484
Noncontrolling interest	316.5	314.6
Total liabilities and equity	4,723.6	4,540
Condensed Consolidating Financial Information KCSR [Member] | Consolidating Adjustments [Member]
Assets:
Current assets	(310.3)	(36.3)
Investments	0	0
Investments in consolidated subsidiaries	(4,652)	(3,665)
Property and equipment (including concession assets), net	(5.9)	(2.7)
Other assets	(2,388.7)	(2,996.6)
Total assets	(7,356.9)	(6,700.6)
Liabilities and equity:
Current liabilities	(311.8)	(37.7)
Long-term debt	(2,388.8)	(2,996.6)
Deferred income taxes	(1.5)	(0.9)
Other liabilities	0	0
Stockholders’ equity	(4,654.8)	(3,665.4)
Noncontrolling interest	0	0
Total liabilities and equity	(7,356.9)	(6,700.6)
Condensed Consolidating Financial Information KCSR [Member] | Parent [Member]
Assets:
Current assets	292	18.3
Investments	0	0
Investments in consolidated subsidiaries	4,462.4	3,497.7
Property and equipment (including concession assets), net	0	0
Other assets	2,159.6	2,767.9
Total assets	6,914	6,283.9
Liabilities and equity:
Current liabilities	277.9	87.3
Long-term debt	2,066.8	2,064.3
Deferred income taxes	(7.1)	26.9
Other liabilities	13.5	4
Stockholders’ equity	4,562.9	4,101.4
Noncontrolling interest	0	0
Total liabilities and equity	6,914	6,283.9
Condensed Consolidating Financial Information KCSR [Member] | KCSR [Member]
Assets:
Current assets	214.1	271.8
Investments	3.9	3.9
Investments in consolidated subsidiaries	7.4	(9.8)
Property and equipment (including concession assets), net	4,283.2	4,024.5
Other assets	46.8	43
Total assets	4,555.4	4,333.4
Liabilities and equity:
Current liabilities	578.7	342.1
Long-term debt	1,517.2	1,928.8
Deferred income taxes	734.8	937.7
Other liabilities	70	86.2
Stockholders’ equity	1,654.7	1,038.6
Noncontrolling interest	0	0
Total liabilities and equity	4,555.4	4,333.4
Condensed Consolidating Financial Information KCSR [Member] | Guarantor Subsidiaries [Member]
Assets:
Current assets	8.8	4.6
Investments	0	0
Investments in consolidated subsidiaries	182.2	177.1
Property and equipment (including concession assets), net	171.6	179.1
Other assets	0	0
Total assets	362.6	360.8
Liabilities and equity:
Current liabilities	94.9	91.7
Long-term debt	0	0.1
Deferred income taxes	84	137.6
Other liabilities	0.3	0.1
Stockholders’ equity	183.4	131.3
Noncontrolling interest	0	0
Total liabilities and equity	362.6	360.8
Condensed Consolidating Financial Information KCSR [Member] | Non-Guarantor Subsidiaries [Member]
Assets:
Current assets	475.5	389.6
Investments	40.7	29
Investments in consolidated subsidiaries	0	0
Property and equipment (including concession assets), net	3,954.9	3,868.8
Other assets	252.5	252.6
Total assets	4,723.6	4,540
Liabilities and equity:
Current liabilities	332	261
Long-term debt	1,040.3	1,274.9
Deferred income taxes	177	188
Other liabilities	55.1	17.5
Stockholders’ equity	2,802.7	2,484
Noncontrolling interest	316.5	314.6
Total liabilities and equity	$ 4,723.6	$ 4,540

Condensed Consolidating State86

Condensed Consolidating Statements of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating activities:
Net cash provided	$ 1,028.4	$ 919	$ 909.2
Investing activities:
Capital expenditures	(585.4)	(563.6)	(688)
Purchase or replacement of equipment under operating leases	(42.6)	(26.6)	(144.2)
Property investments in MSLLC	(26)	(33.1)	(17.4)
Investments in and advances to affiliates	(20.4)	(0.9)	(0.7)
Proceeds from repayment of loans to affiliates	0	0	0
Loans to affiliates	0	0	0
Proceeds from disposal of property	8.8	5	4.6
Other investing activities	(15.5)	(9)	(27.3)
Net cash provided (used)	(681.1)	(628.2)	(873)
Financing activities:
Proceeds from short-term borrowings	12,102.6	8,698.7	10,866.2
Repayment of short-term borrowings	(11,943.6)	(8,597.9)	(11,237.3)
Proceeds from issuance of long-term debt	0	248.7	623.7
Repayment of long-term debt	(25.4)	(276.4)	(149.8)
Dividends paid	(142.5)	(142.8)	(140.1)
Shares repurchased	(375.6)	(185.4)	(194.2)
Proceeds from loans from affiliates	0	0
Repayment of loans from affiliates	0	0	0
Contributions from affiliates	0	0
Other financing activities	0.7	(1.7)	(16.1)
Net cash used for financing activities	(383.8)	(256.8)	(247.6)
Cash and cash equivalents:
Net increase (decrease) during each year	(36.5)	34	(211.4)
At beginning of year	170.6	136.6	348
At end of year	134.1	170.6	136.6
Condensed Consolidating Financial Information KCS [Member] | Consolidating Adjustments [Member]
Operating activities:
Net cash provided	(15.9)	(233.8)	(18.6)
Investing activities:
Capital expenditures	0	0	0
Purchase or replacement of equipment under operating leases	0	0	0
Property investments in MSLLC	0	0	0
Investments in and advances to affiliates	1.2	159.9	1.4
Proceeds from repayment of loans to affiliates	(12,241.7)	(9,067.7)	(293.9)
Loans to affiliates	12,102.6	9,123.4	80
Proceeds from disposal of property	0	(0.1)	(0.3)
Other investing activities	3.4	2	1.2
Net cash provided (used)	(134.5)	217.5	(211.6)
Financing activities:
Proceeds from short-term borrowings	0	(243.5)	0
Repayment of short-term borrowings	0	243.5	0
Proceeds from issuance of long-term debt		0	(80)
Repayment of long-term debt	0	0	0
Dividends paid	12.5	230.2	17.8
Shares repurchased	0	0	0
Proceeds from loans from affiliates	(12,102.6)	(8,879.9)
Repayment of loans from affiliates	12,241.7	8,824.2	293.9
Contributions from affiliates	(1.2)	(159.9)
Other financing activities	0	1.7	(1.5)
Net cash used for financing activities	150.4	16.3	230.2
Cash and cash equivalents:
Net increase (decrease) during each year	0	0	0
At beginning of year	0	0	0
At end of year	0	0	0
Condensed Consolidating Financial Information KCS [Member] | Parent [Member]
Operating activities:
Net cash provided	220.4	434.1	45.2
Investing activities:
Capital expenditures	0	0	0
Purchase or replacement of equipment under operating leases	0	0	0
Property investments in MSLLC	0	0	0
Investments in and advances to affiliates	(0.6)	(153.4)	(0.7)
Proceeds from repayment of loans to affiliates	12,241.7	9,067.7	293.9
Loans to affiliates	(12,102.6)	(9,123.4)	(80)
Proceeds from disposal of property	0	0	0
Other investing activities	0	0	(0.1)
Net cash provided (used)	138.5	(209.1)	213.1
Financing activities:
Proceeds from short-term borrowings	12,102.6	8,698.7	80
Repayment of short-term borrowings	(11,943.6)	(8,597.9)	0
Proceeds from issuance of long-term debt		248.7	0
Repayment of long-term debt	0	(244.8)	0
Dividends paid	(142.5)	(142.8)	(140.1)
Shares repurchased	(375.6)	(185.4)	(194.2)
Proceeds from loans from affiliates	0	0
Repayment of loans from affiliates	0	0	0
Contributions from affiliates	0	0
Other financing activities	0.7	(1.5)	(4)
Net cash used for financing activities	(358.4)	(225)	(258.3)
Cash and cash equivalents:
Net increase (decrease) during each year	0.5	0	0
At beginning of year	0.2	0.2	0.2
At end of year	0.7	0.2	0.2
Condensed Consolidating Financial Information KCS [Member] | Guarantor Subsidiaries [Member]
Operating activities:
Net cash provided	557	236	356.6
Investing activities:
Capital expenditures	(375.5)	(372.8)	(382.8)
Purchase or replacement of equipment under operating leases	(42.6)	(26.6)	(82.8)
Property investments in MSLLC	0	0	0
Investments in and advances to affiliates	(0.6)	(6.5)	(0.7)
Proceeds from repayment of loans to affiliates	0	0	0
Loans to affiliates	0	0	0
Proceeds from disposal of property	6	2	1.3
Other investing activities	(17.2)	(14.9)	(32)
Net cash provided (used)	(429.9)	(418.8)	(497)
Financing activities:
Proceeds from short-term borrowings	0	243.5	10,786.2
Repayment of short-term borrowings	0	(243.5)	(10,937.3)
Proceeds from issuance of long-term debt		0	663.7
Repayment of long-term debt	(3.6)	(3.5)	(88.4)
Dividends paid	0	0	0
Shares repurchased	0	0	0
Proceeds from loans from affiliates	12,102.6	8,879.9
Repayment of loans from affiliates	(12,241.7)	(8,824.2)	(293.9)
Contributions from affiliates	0.6	153.1
Other financing activities	0	(0.1)	(9.2)
Net cash used for financing activities	(142.1)	205.2	121.1
Cash and cash equivalents:
Net increase (decrease) during each year	(15)	22.4	(19.3)
At beginning of year	32.6	10.2	29.5
At end of year	17.6	32.6	10.2
Condensed Consolidating Financial Information KCS [Member] | Non-Guarantor Subsidiaries [Member]
Operating activities:
Net cash provided	266.9	482.7	526
Investing activities:
Capital expenditures	(209.9)	(190.8)	(305.2)
Purchase or replacement of equipment under operating leases	0	0	(61.4)
Property investments in MSLLC	(26)	(33.1)	(17.4)
Investments in and advances to affiliates	(20.4)	(0.9)	(0.7)
Proceeds from repayment of loans to affiliates	0	0	0
Loans to affiliates	0	0	0
Proceeds from disposal of property	2.8	3.1	3.6
Other investing activities	(1.7)	3.9	3.6
Net cash provided (used)	(255.2)	(217.8)	(377.5)
Financing activities:
Proceeds from short-term borrowings	0	0	0
Repayment of short-term borrowings	0	0	(300)
Proceeds from issuance of long-term debt		0	40
Repayment of long-term debt	(21.8)	(28.1)	(61.4)
Dividends paid	(12.5)	(230.2)	(17.8)
Shares repurchased	0	0	0
Proceeds from loans from affiliates	0	0
Repayment of loans from affiliates	0	0	0
Contributions from affiliates	0.6	6.8
Other financing activities	0	(1.8)	(1.4)
Net cash used for financing activities	(33.7)	(253.3)	(340.6)
Cash and cash equivalents:
Net increase (decrease) during each year	(22)	11.6	(192.1)
At beginning of year	137.8	126.2	318.3
At end of year	115.8	137.8	126.2
Condensed Consolidating Financial Information KCSR [Member] | Consolidating Adjustments [Member]
Operating activities:
Net cash provided	(15.9)	(233.8)	(18.6)
Investing activities:
Capital expenditures	0	0	0
Purchase or replacement of equipment under operating leases	0	0	0
Property investments in MSLLC	0	0	0
Investments in and advances to affiliates	1.2	159.9	1.4
Proceeds from repayment of loans to affiliates	(12,241.7)	(9,067.7)	(293.9)
Loans to affiliates	12,102.6	9,123.4	80
Proceeds from disposal of property	0	(0.1)	(0.3)
Other investing activities	3.4	2	1.2
Net cash provided (used)	(134.5)	217.5	(211.6)
Financing activities:
Proceeds from short-term borrowings	0	(243.5)	0
Repayment of short-term borrowings	0	243.5	0
Proceeds from issuance of long-term debt		0	(80)
Repayment of long-term debt	0	0	0
Dividends paid	12.5	230.2	17.8
Shares repurchased	0	0	0
Proceeds from loans from affiliates	(12,102.6)	(8,879.9)
Repayment of loans from affiliates	12,241.7	8,824.2	293.9
Contributions from affiliates	(1.2)	(159.9)
Other financing activities	0	1.7	(1.5)
Net cash used for financing activities	150.4	16.3	230.2
Cash and cash equivalents:
Net increase (decrease) during each year	0	0	0
At beginning of year	0	0	0
At end of year	0	0	0
Condensed Consolidating Financial Information KCSR [Member] | Parent [Member]
Operating activities:
Net cash provided	220.4	434.1	45.2
Investing activities:
Capital expenditures	0	0	0
Purchase or replacement of equipment under operating leases	0	0	0
Property investments in MSLLC	0	0	0
Investments in and advances to affiliates	(0.6)	(153.4)	(0.7)
Proceeds from repayment of loans to affiliates	12,241.7	9,067.7	293.9
Loans to affiliates	(12,102.6)	(9,123.4)	(80)
Proceeds from disposal of property	0	0	0
Other investing activities	0	0	(0.1)
Net cash provided (used)	138.5	(209.1)	213.1
Financing activities:
Proceeds from short-term borrowings	12,102.6	8,698.7	80
Repayment of short-term borrowings	(11,943.6)	(8,597.9)	0
Proceeds from issuance of long-term debt		248.7	0
Repayment of long-term debt	0	(244.8)	0
Dividends paid	(142.5)	(142.8)	(140.1)
Shares repurchased	(375.6)	(185.4)	(194.2)
Proceeds from loans from affiliates	0	0
Repayment of loans from affiliates	0	0	0
Contributions from affiliates	0	0
Other financing activities	0.7	(1.5)	(4)
Net cash used for financing activities	(358.4)	(225)	(258.3)
Cash and cash equivalents:
Net increase (decrease) during each year	0.5	0	0
At beginning of year	0.2	0.2	0.2
At end of year	0.7	0.2	0.2
Condensed Consolidating Financial Information KCSR [Member] | KCSR [Member]
Operating activities:
Net cash provided	556.6	235.4	355.6
Investing activities:
Capital expenditures	(375.2)	(372.2)	(381.5)
Purchase or replacement of equipment under operating leases	(42.6)	(26.6)	(82.8)
Property investments in MSLLC	0	0	0
Investments in and advances to affiliates	0	0	0
Proceeds from repayment of loans to affiliates	0	0	0
Loans to affiliates	0	0	0
Proceeds from disposal of property	6	2	1.3
Other investing activities	(17.2)	(14.9)	(32)
Net cash provided (used)	(429)	(411.7)	(495)
Financing activities:
Proceeds from short-term borrowings	0	243.5	10,786.2
Repayment of short-term borrowings	0	(243.5)	(10,937.3)
Proceeds from issuance of long-term debt		0	663.7
Repayment of long-term debt	(3.5)	(3.4)	(88.3)
Dividends paid	0	0	0
Shares repurchased	0	0	0
Proceeds from loans from affiliates	12,102.6	8,879.9
Repayment of loans from affiliates	(12,241.7)	(8,824.2)	(293.9)
Contributions from affiliates	0	146.6
Other financing activities	0	(0.1)	(9.9)
Net cash used for financing activities	(142.6)	198.8	120.5
Cash and cash equivalents:
Net increase (decrease) during each year	(15)	22.5	(18.9)
At beginning of year	32.6	10.1	29
At end of year	17.6	32.6	10.1
Condensed Consolidating Financial Information KCSR [Member] | Guarantor Subsidiaries [Member]
Operating activities:
Net cash provided	0.4	0.6	1
Investing activities:
Capital expenditures	(0.3)	(0.6)	(1.3)
Purchase or replacement of equipment under operating leases	0	0	0
Property investments in MSLLC	0	0	0
Investments in and advances to affiliates	(0.6)	(6.5)	(0.7)
Proceeds from repayment of loans to affiliates	0	0	0
Loans to affiliates	0	0	0
Proceeds from disposal of property	0	0	0
Other investing activities	0	0	0
Net cash provided (used)	(0.9)	(7.1)	(2)
Financing activities:
Proceeds from short-term borrowings	0	0	0
Repayment of short-term borrowings	0	0	0
Proceeds from issuance of long-term debt		0	0
Repayment of long-term debt	(0.1)	(0.1)	(0.1)
Dividends paid	0	0	0
Shares repurchased	0	0	0
Proceeds from loans from affiliates	0	0
Repayment of loans from affiliates	0	0	0
Contributions from affiliates	0.6	6.5
Other financing activities	0	0	0.7
Net cash used for financing activities	0.5	6.4	0.6
Cash and cash equivalents:
Net increase (decrease) during each year	0	(0.1)	(0.4)
At beginning of year	0	0.1	0.5
At end of year	0	0	0.1
Condensed Consolidating Financial Information KCSR [Member] | Non-Guarantor Subsidiaries [Member]
Operating activities:
Net cash provided	266.9	482.7	526
Investing activities:
Capital expenditures	(209.9)	(190.8)	(305.2)
Purchase or replacement of equipment under operating leases	0	0	(61.4)
Property investments in MSLLC	(26)	(33.1)	(17.4)
Investments in and advances to affiliates	(20.4)	(0.9)	(0.7)
Proceeds from repayment of loans to affiliates	0	0	0
Loans to affiliates	0	0	0
Proceeds from disposal of property	2.8	3.1	3.6
Other investing activities	(1.7)	3.9	3.6
Net cash provided (used)	(255.2)	(217.8)	(377.5)
Financing activities:
Proceeds from short-term borrowings	0	0	0
Repayment of short-term borrowings	0	0	(300)
Proceeds from issuance of long-term debt		0	40
Repayment of long-term debt	(21.8)	(28.1)	(61.4)
Dividends paid	(12.5)	(230.2)	(17.8)
Shares repurchased	0	0	0
Proceeds from loans from affiliates	0	0
Repayment of loans from affiliates	0	0	0
Contributions from affiliates	0.6	6.8
Other financing activities	0	(1.8)	(1.4)
Net cash used for financing activities	(33.7)	(253.3)	(340.6)
Cash and cash equivalents:
Net increase (decrease) during each year	(22)	11.6	(192.1)
At beginning of year	137.8	126.2	318.3
At end of year	$ 115.8	$ 137.8	$ 126.2