Leases - Summary of Lease Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019
Leases [Abstract]
Operating lease cost	$ 3.4		$ 10.3
Variable Lease, Cost	0.1	$ 0.2
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	3.7		11.0
ROU asset obtained in exchange for new operating lease liabilities	$ 0.1		$ 5.5