Leases - Maturity Schedule for Finance and Operating Leases (Details) $ in Millions	Dec. 31, 2019 USD ($)
Operating Leases
Six months ending June 30, 2020	$ 10.0
Twelve months ending June 30, 2021	17.8
Twelve months ending June 30, 2022	15.5
Twelve months ending June 30, 2023	11.4
Twelve months ending June 30, 2024	9.2
Twelve months ending June 30, 2025	7.7
Thereafter	10.5
Total undiscounted lease payments	82.1
Less: imputed interest	(7.8)
Less: lease incentive receivable	(7.9)
Total lease liabilities	66.4
Finance Leases
Six months ending June 30, 2020	3.5
Twelve months ending June 30, 2021	6.1
Twelve months ending June 30, 2022	5.1
Twelve months ending June 30, 2023	3.5
Twelve months ending June 30, 2024	0.1
Twelve months ending June 30, 2025	0.0
Thereafter	0.0
Total undiscounted lease payments	18.3
Less: imputed interest	(1.2)
Less: lease incentive receivable	0.0
Total lease liabilities	$ 17.1