Commitments And Contingencies (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014	Oct. 31, 2013	Jan. 31, 2014
Loss Contingencies [Line Items]
Accrual for Value Added Tax Matters Increase (Decrease)	$ 0	$ 0	$ 6,229,000	$ 0
CIDE tax	25,600,000		25,600,000		25,300,000
Synthetic Lease Facility
Loss Contingencies [Line Items]
Residual value guarantee, aggregate amount	133,800,000		133,800,000
Future minimum payments	2,600,000		2,600,000
Financial Guarantee
Loss Contingencies [Line Items]
Aggregate amount of guarantees	7,000,000		7,000,000		13,400,000
SPAIN
Loss Contingencies [Line Items]
Loss Contingency Accrual	48,100,000		48,100,000		56,400,000
Interest Expense | SPAIN
Loss Contingencies [Line Items]
Accrual for Value Added Tax Matters Increase (Decrease)			$ 6,200,000