Fair Values of Pension Plan Assets (Detail) (Canadian Qualified Pension Plan, USD $) In Millions, unless otherwise specified	Feb. 02, 2013		Jan. 28, 2012
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Cash and cash equivalents	$ 2		$ 5	[1]
Pension plan assets at fair value	88		93	[1]
Equity Securities | Canadian and International
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Pension plan assets at fair value	5	[2]	5	[1],[2]
Fixed-income securities | Cash matched bonds
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Pension plan assets at fair value	81	[3]	83	[1],[3]
Level 1
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Pension plan assets at fair value	5
Level 1 | Equity Securities | Canadian and International
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Pension plan assets at fair value	5	[2]
Level 2
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Cash and cash equivalents	2
Pension plan assets at fair value	83
Level 2 | Fixed-income securities | Cash matched bonds
Schedule of Pension and Other Postretirment Plan Assets by Fair Value [Line Items]
Pension plan assets at fair value	$ 81	[3]

[1] Each category of plan assets is classified within the same level of the fair value hierarchy for 2012 and 2011.

[2] This category comprises one mutual fund that invests primarily in a diverse portfolio of Canadian securities.

[3] This category consists of fixed-income securities, including strips and coupons, issued or guaranteed by the Government of Canada, provinces or municipalities of Canada including their agencies and crown corporations, as well as other governmental bonds and corporate bonds.