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Leases - Maturities of Lease Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Operating Leases
2019	$ 16.8
2020	30.0
2021	18.4
2022	13.3
2023	12.2
2024 and thereafter	12.1
Total lease payments	102.8
Less imputed interest	(15.4)
Total lease liabilities	87.4
Finance Leases
2019	17.4
2020	7.6
2021	0.0
2022	0.0
2023	0.0
2024 and thereafter	0.0
Total lease payments	25.0
Less imputed interest	(0.5)
Total lease liabilities	$ 24.5	$ 40.0

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