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Leases (Maturities of Operating Lease Liabilities) (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Jan. 01, 2019
Leases [Abstract]    
Year 1 $ 138.1  
Year 2 111.0  
Year 3 82.3  
Year 4 60.6  
Year 5 55.7  
After Year 5 272.7  
Total lease payments 720.4  
Less imputed interest 112.0  
Total $ 608.4 $ 595.0