Shareholders' Equity - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	Nov. 01, 2014	May 03, 2014	Oct. 26, 2013	May 15, 2007 Maximum	Nov. 01, 2014 Stock Repurchase Program
Class of Stock [Line Items]
Number of shares authorized to be repurchase				$ 400,000
Remaining authorized repurchase amount	2,471
Treasury stock, shares	34,519,000	34,364,000	34,281,000		34,519,310
Treasury stock, at cost	$ 1,072,069	$ 1,069,109	$ 1,067,433		$ 1,072,069

Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.28,29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

Name:	us-gaap_TreasuryStockShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant