Commitments and Contingencies - Commitments (Details) $ in Millions	Mar. 31, 2019 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Purchase obligation	$ 632.4
Excess purchase commitments and obsolete materials liability	$ 32.8

Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

No definition available.