CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (USD $)	Total	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Non-controlling Interests [Member]
Beginning Balances at Jan. 31, 2012	$ 2,348,905,000	$ 1,462,553,000	$ (85,130,000)	$ 1,267,000	$ 970,215,000	$ 0
Beginning Balance, Shares at Jan. 31, 2012				126,676,000
Exercise of stock options and vesting of restricted stock units ("RSUs")	13,012,000	0	0	10,000	13,002,000	0
Exercise of stock options and vesting of restricted stock units ("RSUs"), shares				1,026,000
Tax effect of exercise of stock options and vesting of RSUs	11,730,000	0	0	0	11,730,000	0
Share-based compensation expense	27,224,000	0	0	0	27,224,000	0
Issuance Of Common Stock Under EPSRS Plan	3,150,000	0	0	0	3,150,000	0
Issuance Of Shares Common Stock Under Employee Profit Sharing And Retirement Savings (EPSRS) Plan				45,000
Purchase and retirement of Common Stock, Value	(54,107,000)	(48,775,000)	0	(8,000)	(5,324,000)	0
Purchase and retirement of Common Stock, Shares	(813,000)			(813,000)
Cash dividends on Common Stock	(158,594,000)	(158,594,000)	0	0	0	0
Other comprehensive (loss) earnings, net of tax	(8,745,000)	0	(8,745,000)	0	0	0
Net earnings	416,157,000	416,157,000	0	0	0	0
Non-controlling interests	12,586,000					12,586,000
Ending Balances at Jan. 31, 2013	2,611,318,000	1,671,341,000	(93,875,000)	1,269,000	1,019,997,000	12,586,000
Ending Balance, Shares at Jan. 31, 2013				126,934,000
Exercise of stock options and vesting of restricted stock units ("RSUs")	27,895,000	0	0	14,000	27,881,000	0
Exercise of stock options and vesting of restricted stock units ("RSUs"), shares				1,378,000
Tax effect of exercise of stock options and vesting of RSUs	14,922,000	0	0	0	14,922,000	0
Share-based compensation expense	(32,504,000)				(32,504,000)
Issuance Of Common Stock Under EPSRS Plan	0
Purchase and retirement of Common Stock, Shares	0			0
Cash dividends on Common Stock	(170,312,000)	(170,312,000)	0	0	0	0
Other comprehensive (loss) earnings, net of tax	35,327,000	0	35,327,000	0	0	0
Net earnings	181,369,000	181,369,000	0	0	0	0
Non-controlling interests	945,000	0	0	0	0	945,000
Ending Balances at Jan. 31, 2014	2,733,968,000	1,682,398,000	(58,548,000)	1,283,000	1,095,304,000	13,531,000
Ending Balance, Shares at Jan. 31, 2014	128,312,000			128,312,000
Exercise of stock options and vesting of restricted stock units ("RSUs")	36,908,000	0	0	13,000	36,895,000	0
Exercise of stock options and vesting of restricted stock units ("RSUs"), shares				1,270,000
Tax effect of exercise of stock options and vesting of RSUs	14,066,000	0	0	0	14,066,000	0
Share-based compensation expense	26,738,000	0	0	0	26,738,000	0
Issuance Of Common Stock Under EPSRS Plan	3,925,000				3,925,000
Issuance Of Shares Common Stock Under Employee Profit Sharing And Retirement Savings (EPSRS) Plan				45,000
Purchase and retirement of Common Stock, Value	(27,028,000)	(24,803,000)	0	(3,000)	(2,222,000)	0
Purchase and retirement of Common Stock, Shares	(301,000)			(301,000)
Cash dividends on Common Stock	(191,171,000)	(191,171,000)	0	0	0	0
Other comprehensive (loss) earnings, net of tax	(231,914,000)	0	(231,914,000)	0	0	0
Net earnings	484,179,000	484,179,000	0	0	0	0
Redemption of non-controlling interest	0	0	0	0	(1,081,000)	1,081,000
Non-controlling interests	1,000,000	0	0	0	0	1,000,000
Ending Balances at Jan. 31, 2015	$ 2,850,671,000	$ 1,950,603,000	$ (290,462,000)	$ 1,293,000	$ 1,173,625,000	$ 15,612,000
Ending Balance, Shares at Jan. 31, 2015	129,326,000			129,326,000