Carrying Amount and Fair Value of Outstanding Debt (Detail) (USD $) In Millions, unless otherwise specified	Aug. 02, 2014
Debt Instrument [Line Items]
Carrying Value	$ 1,400.2
Fair Value	1,401.8
4.700% senior unsecured notes due in 2024
Debt Instrument [Line Items]
Carrying Value	398.4
Fair Value	400.0
2 Year Revolving Asset-Backed Variable Funding Notes
Debt Instrument [Line Items]
Carrying Value	600.0
Fair Value	600.0
Term loan
Debt Instrument [Line Items]
Carrying Value	400.0
Fair Value	400.0
Capital lease obligations
Debt Instrument [Line Items]
Carrying Value	1.8
Fair Value	$ 1.8