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Leases (Maturity of Lease Liability) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Operating leases
2021	$ 16.8
2022	15.9
2023	15.4
2024	14.9
2025	14.2
After 2025	166.9
Total lease payments	244.1
less: interest	93.8
Present value of lease liabilities	150.3
Finance leases
2021	1.2
2022	0.7
2023	0.3
2024	0.0
2025	0.0
After 2025	0.0
Total lease payments	2.2
less: interest	0.1
Present value of lease liabilities	$ 2.1	$ 2.4

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