Contingencies (Details) - USD ($) $ in Millions	Sep. 30, 2018	Apr. 24, 2018
Civil Penalty
Loss Contingencies [Line Items]
Loss contingency accrual	$ 15.0
Civil Penalty | Other Current Liabilities
Loss Contingencies [Line Items]
Loss contingency accrual	3.5
Civil Penalty | Other Noncurrent Liabilities
Loss Contingencies [Line Items]
Loss contingency accrual	10.5
Civil Penalty | Maximum
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss		$ 30.0
Loss contingency, possible loss suspension		$ 15.0
Product Quality Matters
Loss Contingencies [Line Items]
Loss contingency accrual	5.2
Product Quality Matters | Minimum
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss	5.2
Product Quality Matters | Maximum
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss	$ 12.4