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Commitments And Contingencies Commitments And Contingencies (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012
Commitments and Contingencies Disclosure [Abstract]
Initial estimate of potential exposure, minimum	$ 0
Initial estimate of potential exposure, maximum	$ 1.9

The estimated maximum amount of possible loss from the contingency.

The estimated minimum amount of possible loss from the contingency.