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Contingencies (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012
Commitments and Contingencies Disclosure [Abstract]
Accrual for environmental loss contingencies	$ 4.7
Loss contingency, range of possible loss, minimum	0
Loss contingency, range of possible loss, maximum	$ 3.2

Total costs accrued as of the balance sheet date for environmental loss contingencies.

The estimated maximum amount of possible loss from the contingency.

The estimated minimum amount of possible loss from the contingency.