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Commitments and Contingencies (Details 4) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012 site
Range of environmental liability and number of active sites for these environmental matters
Low-end estimate	$ 77.5
High end estimate	$ 167.3
Number of active environmental investigation and remediation sites	66

The estimated maximum amount of possible loss from the contingency.

The estimated minimum amount of possible loss from the contingency.