Commitments and Contingencies Contractual Obligations (Details) $ in Millions	Sep. 30, 2015 USD ($)
Long-term Purchase Commitment [Line Items]
Purchase Obligation	$ 33.3
Purchase Obligation, Due in Second Year	13.4
Purchase Obligation, Due in Third Year	6.7
Equipment [Member]
Long-term Purchase Commitment [Line Items]
Purchase Obligation	7.1
Purchase Obligation, Due in Second Year	5.3
Purchase Obligation, Due in Third Year	0.1
Raw Materials [Member]
Long-term Purchase Commitment [Line Items]
Purchase Obligation	26.2
Purchase Obligation, Due in Second Year	6.5
Purchase Obligation, Due in Third Year	0.5
Energy [Member]
Long-term Purchase Commitment [Line Items]
Purchase Obligation, Due in Second Year	1.6
Purchase Obligation, Due in Third Year	$ 6.1