Contingencies (Details) $ in Millions	Dec. 31, 2017 USD ($)
Loss Contingencies [Line Items]
Loss contingencies, estimate of possible loss	$ 100.0
Damages from Product Defects
Loss Contingencies [Line Items]
Loss contingencies, estimate of possible loss	69.7
Indemnification Agreement
Loss Contingencies [Line Items]
Loss contingencies, estimate of possible loss	$ 159.0