Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details)	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Income Tax Disclosure [Abstract]
U.S. statutory rate	35.00%	35.00%	35.00%
State income taxes, net of federal benefit	0.80%	1.10%	0.50%
Net changes in deferred tax valuation allowances	(3.40%)	0.00%	(4.50%)
Tax on foreign earnings different than U.S. rate	(9.90%)	(7.40%)	(11.80%)
Nondeductible interest	2.10%	1.60%	4.00%
Reserve established for foreign income tax contingencies	0.50%	0.00%	0.10%
Effect of company-owned life insurance	(0.70%)	0.20%	(0.40%)
Undistributed earnings on foreign assets held for sale	0.00%	0.00%	2.40%
Other, net	(0.40%)	0.00%	1.50%
Effective tax rate	24.00%	30.50%	26.80%