Summary of Pre-Tax Gains (Losses) Recorded In Accumulated OCI for Derivatives (Parenthetical) (Detail) (Commodity Contract, Cash Flow Hedging, USD $) In Millions, unless otherwise specified	Nov. 01, 2014	Feb. 01, 2014	Nov. 02, 2013
Commodity Contract | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive losses before tax related to net terminated contracts	$ 3.6	$ 18.2	$ 25.9