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Commitments and Contingencies - Contingencies (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	May 31, 2013
Loss Contingencies [Line Items]
Loss Contingency, Range of Possible Loss, Minimum	$ 16
Loss Contingency, Range of Possible Loss, Maximum	65.0
Loss Contingency, Loss in Period	$ 15.5
Loss Contingency, Estimated Recovery from Third Party	0

The estimated maximum amount of possible loss from the contingency.

The estimated minimum amount of possible loss from the contingency.