Income Taxes Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Millions	Jan. 31, 2017	Jan. 31, 2016
Income Tax Disclosure [Abstract]
Pension/postretirement benefits	$ 124.7	$ 166.7
Accrued expenses	36.1	34.3
Share-based Compensation	17.3	18.3
Depreciation	6.5	6.6
Amortization	10.8	11.4
Foreign and state net operating losses	25.5	23.5
Sale Leaseback	25.8	30.4
Inventory	57.6	50.9
Financial hedging instruments	11.9	19.7
Unearned Income	10.6	11.3
Other	23.0	53.6
Deferred Tax Assets, Gross	349.8	426.7
Valuation Allowance	(24.1)	(19.5)
Deferred Tax Assets, Net of Valuation Allowance	325.7	407.2
Foreign Tax Credit	(25.8)	(25.1)
Deferred Tax Assets, Net	$ 299.9	$ 382.1