Loans, overdrafts and long-term debt (Detail) (USD $) In Millions, unless otherwise specified	May 02, 2015	Jan. 31, 2015	May 03, 2014
Debt Disclosure [Abstract]
Revolving credit facility	$ 0us-gaap_LinesOfCreditCurrent	$ 0us-gaap_LinesOfCreditCurrent	$ 0us-gaap_LinesOfCreditCurrent
Current portion of senior unsecured term loan	27.5us-gaap_LongTermDebtCurrent	25.0us-gaap_LongTermDebtCurrent	0us-gaap_LongTermDebtCurrent
Current portion of capital lease obligations	0.7us-gaap_CapitalLeaseObligationsCurrent	0.9us-gaap_CapitalLeaseObligationsCurrent	0us-gaap_CapitalLeaseObligationsCurrent
Bank overdrafts	16.6us-gaap_BankOverdrafts	71.6us-gaap_BankOverdrafts	8.8us-gaap_BankOverdrafts
Total loans and overdrafts	44.8us-gaap_ShortTermBorrowings	97.5us-gaap_ShortTermBorrowings	8.8us-gaap_ShortTermBorrowings
Senior unsecured notes due 2024, net of unamortized discount	398.5us-gaap_SeniorLongTermNotes	398.5us-gaap_SeniorLongTermNotes	0us-gaap_SeniorLongTermNotes
Securitization facility	600.0us-gaap_LongTermLineOfCredit	600.0us-gaap_LongTermLineOfCredit	0us-gaap_LongTermLineOfCredit
Senior unsecured term loan	357.5us-gaap_OtherLongTermNotesPayable	365.0us-gaap_OtherLongTermNotesPayable	0us-gaap_OtherLongTermNotesPayable
Capital lease obligations	0.2	0.3	0
Total long-term debt	1,356.2	1,363.8	0
Total loans, overdrafts and long-term debt	$ 1,401.0	$ 1,461.3	$ 8.8

Carrying value as of the balance sheet date of payments made in excess of existing cash balances, which will be honored by the bank but reflected as a loan to the entity. Overdrafts generally have a very short time frame for correction or repayment and are therefore more similar to short-term bank financing than trade financing.

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Amount of capital lease obligation due within one year or the normal operating cycle, if longer.

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date.

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Represents the aggregate of total long-term debt, including current maturities and short-term debt.

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The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Carrying value of the noncurrent portion of notes payable which were initially due after one year or beyond the normal operating cycle, if longer, and which are not otherwise defined in the taxonomy.

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Carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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