Environmental Environmental Remediation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Environmental Exit Cost [Line Items]
Environmental Remediation Expense	$ 0.7	$ 3.6	$ 3.1
Accrual for Environmental Loss Contingencies	7.1	7.7
Accrued Environmental Loss Contingencies, Noncurrent	5.4	6.1
Affiliated Entity [Member]
Environmental Exit Cost [Line Items]
Accrual for Environmental Loss Contingencies	$ 0.9	$ 6.4