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Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Commitment And Contingencies [Line Items]
Rent expense	$ 48.3	$ 31.6	$ 25.9
Advertising expense	62.3	54.1	43.8
License Agreements
Commitment And Contingencies [Line Items]
Royalty expense	101.5	85.2	68.7
Advertising expense	$ 30.0	$ 24.9	$ 22.9
License Agreements | Minimum
Commitment And Contingencies [Line Items]
Royalty payments as a percentage of net sales	4.00%
License Agreements | Maximum
Commitment And Contingencies [Line Items]
Royalty payments as a percentage of net sales	19.00%

X

- Details

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- Definition

Percent Of Royalty On Net Sale

+ References

No definition available.

+ Details

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X

- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 720

-SubTopic 35

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848

+ Details

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X

- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

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- Definition

Amount of expense related to royalty payments under a contractual arrangement such as payment for mineral and drilling rights and use of technology or intellectual property.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.3)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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