Leases - Aggregate Principal Payments (Details) $ in Millions	Jun. 30, 2019 USD ($)
Operating Leases
2019 (remaining)	$ 22.4
2020	40.0
2021	36.6
2022	31.6
2023	30.1
Thereafter	141.9
Total lease payments	302.6
Less: interest	(50.2)
Present value of lease liabilities	252.4
Finance Leases
2019 (remaining)	6.8
2020	13.4
2021	13.1
2022	12.5
2023	37.9
Thereafter	127.3
Total lease payments	211.0
Less: interest	(103.3)
Finance lease liability	107.7
Total
2019 (remaining)	29.2
2020	53.4
2021	49.7
2022	44.1
2023	68.0
Thereafter	269.2
Total lease payments	513.6
Less: interese	(153.5)
Present value of lease liability	$ 360.1