Financial Instruments (Schedule of Notes Payable and Long-Term Debt) (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Aug. 01, 2014
Notes Which Mature In December 2020
Debt Instrument [Line Items]
Senior unsecured notes, face amount	$ 450
Debt maturity date	Dec. 01, 2020
Notes Which Mature In December 2040
Debt Instrument [Line Items]
Senior unsecured notes, face amount	300
Debt maturity date	Dec. 01, 2040
Notes Which Mature In July 2032
Debt Instrument [Line Items]
Senior unsecured notes, face amount	250
Debt maturity date	Jul. 01, 2032
Notes Which Mature In July 2033
Debt Instrument [Line Items]
Senior unsecured notes, face amount	$ 300
Debt maturity date	Jul. 01, 2033