Financial Instruments and Fair Value Measurements - Additional Information (Detail) (Significant Other Observable Inputs (Level 2), USD $) In Millions, unless otherwise specified	Jan. 24, 2014
Senior Notes
Fair Value of Financial Instruments [Line Items]
Long-term Debt	$ 983.7
Senior Notes due 2017
Fair Value of Financial Instruments [Line Items]
Notes issued, interest rate	2.00%
Senior Notes due 2022
Fair Value of Financial Instruments [Line Items]
Notes issued, interest rate	3.25%

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13433-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13476-108611

Name:	us-gaap_DebtInstrumentFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant