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Natural Disasters (Details) (Churchill Downs, Hail [Member], USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2012
Churchill Downs | Hail [Member]
    
Business Interruption Loss [Line Items]    
Insurance Deductible   $ 0.5chdn_InsuranceDeductible
/ us-gaap_BusinessInterruptionLossAxis
= chdn_HailMember
/ chdn_CasinoByLocationAxis
= chdn_ChurchillDownsMember
Insurance Settlements, Cash Settlement Received $ 0.4chdn_InsuranceSettlementsCashSettlementReceived
/ us-gaap_BusinessInterruptionLossAxis
= chdn_HailMember
/ chdn_CasinoByLocationAxis
= chdn_ChurchillDownsMember