Schedule of Basic and Diluted EPS (Detail) (USD $)	3 Months Ended																12 Months Ended
	Jan. 31, 2014		Nov. 01, 2013		Aug. 02, 2013		May 03, 2013		Jan. 31, 2013		Oct. 31, 2012		Jul. 31, 2012		Apr. 30, 2012		Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Basic:
Income (loss) from continuing operations																	$ 0.98	$ 3.82	$ (2.80)
Income from discontinued operations																	$ 0.96	$ 2.37	$ 3.48
Total basic earnings per share	$ 0.57	[1],[2]	$ (0.10)	[1],[2]	$ 0.06	[1],[2]	$ 0.43	[1],[2]	$ 1.73	[1]	$ 0.70	[1]	$ 0.72	[1]	$ 0.67	[1]	$ 1.94	$ 6.19	$ 0.68
Diluted:
Income (loss) from continuing operations																	$ 0.98	$ 3.82	$ (2.80)
Income from discontinued operations																	$ 0.96	$ 2.37	$ 3.48
Total diluted earnings per share	$ 0.56	[1],[2]	$ (0.10)	[1],[2]	$ 0.06	[1],[2]	$ 0.43	[1],[2]	$ 1.73	[1]	$ 0.70	[1]	$ 0.72	[1]	$ 0.67	[1]	$ 1.94	$ 6.19	$ 0.68

[1] Earnings per share are computed independently for each of the quarters presented and therefore may not sum to the total for the fiscal year.

[2] Fiscal 2014 quarterly results include increased charges related to intangible asset impairment charges (second quarter charge was $30 million and another charge in the third quarter of $19 million), bad debt expense (third quarter expense was $42 million) and separation transaction and restructuring expenses (approximately $33 million in the first and second quarters combined, $25 million in the third quarter, and $7 million in the fourth quarter). For further information see, Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations.