Gross amount due in settlement or partial settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy, before related self-insured retention amount.

No definition available.

+ Details

Name:	ksu_InsuranceSettlementsGross
Namespace Prefix:	ksu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of cash inflow for proceeds from settlement of insurance claim.

+ References

No definition available.

+ Details

Name:	ksu_ProceedsFromInsuranceSettlementOperatingandInvestingActivities
Namespace Prefix:	ksu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of excess (deficiency) of insurance recovery over the loss incurred from an insured event.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 30
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6397426&loc=d3e17499-108355

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
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Period Type:

Hurricane Harvey (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Hurricane Harvey (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Unusual or Infrequent Item, or Both [Line Items]
Gain on insurance recoveries related to hurricane damage		$ 0.0	$ 0.0	$ 17.9
Hurricane Harvey [Member]
Unusual or Infrequent Item, or Both [Line Items]
Partial settlement of insurance claim, gross	$ 35.5			35.5
Gain on insurance recoveries related to hurricane damage				$ 17.9
Proceeds from insurance settlement	$ 25.5