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Receivables and Financing Arrangements (Details) (USD $)
In Millions, unless otherwise specified
Apr. 30, 2015
Apr. 30, 2014
ReceivablesAndFinancingArrangements [Abstract]    
Consumer Credit Card Financing Receivables $ 68.0tif_ConsumerCreditCardFinancingReceivables $ 59.8tif_ConsumerCreditCardFinancingReceivables
Consumer Credit Card Financing Receivables Percentage Current 97.00%tif_ConsumerCreditCardFinancingReceivablesPercentageCurrent 97.00%tif_ConsumerCreditCardFinancingReceivablesPercentageCurrent
Consumer Credit Card Financing Receivable Allowance For Credit Losses 1.0tif_ConsumerCreditCardFinancingReceivableAllowanceForCreditLosses 1.0tif_ConsumerCreditCardFinancingReceivableAllowanceForCreditLosses
Financing Receivables Gross Current 21.0tif_FinancingReceivablesGrossCurrent 19.1tif_FinancingReceivablesGrossCurrent
Financing Receivables Gross Non Current $ 41.3tif_FinancingReceivablesGrossNonCurrent $ 51.5tif_FinancingReceivablesGrossNonCurrent