Debt - Additional Information (Detail) (USD $)	Jan. 31, 2013
Debt Instrument [Line Items]
Maximum cash borrowings and letters of credit	$ 346,000,000
Direct borrowings	93,000,000
Letters of credit outstanding	61,000,000
Amount of availability of remaining borrowings	114,000,000
United States [Member]
Debt Instrument [Line Items]
Amount of remaining borrowing capacity available for letters of credit	35,000,000
EMEA and APAC [Member]
Debt Instrument [Line Items]
Amount of remaining borrowing capacity available for letters of credit	$ 77,000,000