Commitments And Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified			3 Months Ended						3 Months Ended		6 Months Ended		3 Months Ended
	Jul. 31, 2014	Jan. 31, 2014	Jul. 31, 2014 Synthetic Lease Facility property	Jul. 31, 2014 Option One property	Jul. 31, 2014 Option Two property	Jul. 31, 2014 Option Three property	Jul. 31, 2014 Financial Guarantee	Jan. 31, 2014 Financial Guarantee	Jul. 31, 2014 Minimum Synthetic Lease Facility	Jul. 31, 2014 Maximum Synthetic Lease Facility	Jul. 31, 2014 SPAIN subsidiary	Jan. 31, 2014 SPAIN	Jul. 31, 2014 Interest Expense SPAIN
Loss Contingencies [Line Items]
Option for Purchase During Lease, Minimum Number of Days Notice, Days			30 days
Number of Properties Subject to Purchase Options, During Lease			1
Option expiration, days until lease expiration, days									270 days	360 days
Minimum number of properties, for which an option needs to be elected				2	2	2
Residual value guarantee, aggregate amount			$ 133.8
Future minimum payments			2.6
Aggregate amount of guarantees							11.9	13.4
Number of Subsidiaries Subject to Audit											1
Accrual for Value Added Tax Matters Increase (Decrease)													6.2
Value Added Tax Payable											50.9	56.4
CIDE tax	$ 27.5	$ 25.3