Stockholders' Equity - Additions to and Reclassifications out of Accumulated Other Comprehensive (Loss) Earnings (Detail) (USD $)	12 Months Ended
	Jan. 31, 2015		Jan. 31, 2014		Jan. 31, 2013
Equity [Abstract]
Foreign currency translation adjustments	$ (101,900,000)		$ (31,742,000)		$ (11,567,000)
Income tax benefit	8,770,000		4,524,000		6,422,000
Foreign currency translation adjustments	(93,130,000)		(27,218,000)		(5,145,000)
Unrealized (loss) gain on marketable securities	(870,000)		1,234,000		2,640,000
Reclassification for loss included in net earnings	0	[1]	0	[1]	6,000	[1]
Income tax benefit (expense)	105,000		(406,000)		(927,000)
Unrealized (loss) gain on marketable securities	(765,000)		828,000		1,719,000
Unrealized gain (loss) on hedging instruments	14,620,000		8,716,000		(4,439,000)
Reclassification adjustment for (gain) loss included in net earnings	(13,017,000)	[2]	(13,950,000)	[2]	12,168,000	[2]
Income tax (expense) benefit	(395,000)		1,834,000		(2,207,000)
Unrealized gain (loss) on hedging instruments	1,208,000		(3,400,000)		5,522,000
Prior service cost	(477,000)
Net actuarial (loss) gain	(234,669,000)		86,310,000		(34,520,000)
Amortization of net loss included in net earnings	13,144,000	[3]	19,217,000	[3]	15,993,000	[3]
Amortization of prior service (credit) cost included in net earnings	(407,000)	[3]	313,000	[3]	356,000	[3]
Income tax benefit (expense)	83,182,000		(40,723,000)		7,330,000
Net unrealized (loss) gain on benefit plans	(139,227,000)		65,117,000		(10,841,000)
Other comprehensive (loss) earnings, net of tax	$ (231,914,000)		$ 35,327,000		$ (8,745,000)

[1] These losses are reclassified into Other income, net.

[2] These (gains) losses are reclassified into Interest expense and financing costs and Cost of sales (see "Note H - Hedging Instruments" for additional details).

[3] These accumulated other comprehensive income components are included in the computation of net periodic pension costs (see "Note N - Employee Benefit Plans" for additional details).