Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies EPA Accrual (Details)

v3.5.0.2
Commitments and Contingencies EPA Accrual (Details) - BTU International, Inc (BTU) Merger - Loss from Catastrophes
$ in Millions
Sep. 30, 2016
USD ($)
Loss Contingencies [Line Items]  
Loss contingency accrual, less than $ 0.0
Letters of credit $ 0.0