Lawsuits, Claims, Commitments and Contingencies (Details) - EPA Record of Decision (ROD), Diamond Alkali Superfund Site $ in Millions	1 Months Ended	3 Months Ended
Mar. 31, 2016 mi	Sep. 30, 2016 USD ($)
Lawsuits, commitments and contingencies
Stretch of Lower Passaic river requiring remedial actions	8.3
Stretch of Lower Passaic river not covered by remedial actions	9
Clean-up estimated cost \| $		$ 165

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