Commitments And Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified			3 Months Ended				3 Months Ended			9 Months Ended	3 Months Ended
	Apr. 30, 2013	Jan. 31, 2013	Jul. 31, 2013 Subsequent Event Synthetic Lease Facility property	Jul. 31, 2013 Subsequent Event Option One property	Jul. 31, 2013 Subsequent Event Option Two property	Jul. 31, 2013 Subsequent Event Option Three property	Jul. 31, 2013 Minimum Subsequent Event Synthetic Lease Facility	Jul. 31, 2013 Maximum Subsequent Event Synthetic Lease Facility	Jan. 31, 2013 SPAIN	Oct. 31, 2013 SPAIN subsidiary	Jan. 31, 2013 Litigation Charge SPAIN	Jan. 31, 2013 Interest Expense SPAIN	Apr. 30, 2013 Accrued Expenses and Other Liabilities SPAIN
Loss Contingencies [Line Items]
Minimum number of days' notice to opt for purchase during lease, days			30 days
Number of properties subject to purchase during lease period			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			2.8
Aggregate amount of guarantees, outstanding	29.5	31.3
Number of subsidiaries subject to audit										1
Increase in accrual for value added tax matters									41.0		29.5	11.5
Value added tax payable													54.2
CIDE tax	$ 29.7