Leases - Other information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
Cash paid for amounts included in measurement of lease liabilities:
Operating cash flows from finance leases	$ 0.6
Financing cash flows from finance leases	5.0
Right-of-use assets obtained in exchange for lease obligations: Finance leases	23.5
Right-of-use assets obtained in exchange for lease obligations: Operating leases	$ 10.8