Long-Term Debt, Exclusive of Current Installments (Detail) - USD ($) $ in Thousands	Oct. 31, 2015	Jan. 31, 2015	Nov. 01, 2014
Debt Instrument [Line Items]
Long-term debt	$ 1,624,007	$ 1,623,864	$ 1,623,817
6.95% Ten-Year Notes
Debt Instrument [Line Items]
Long-term debt	374,760	374,706	374,689
2.50% Ten-Year Notes
Debt Instrument [Line Items]
Long-term debt	499,665	499,633	499,622
2.75% Seven-Year Notes
Debt Instrument [Line Items]
Long-term debt	$ 749,582	$ 749,525	$ 749,506

Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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 210.5-02.22)

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

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