Leases (Maturities of Lease Liabilities) (Details) $ in Millions	Dec. 31, 2019 USD ($)
Leases [Abstract]
Due in next twelve months	$ 179.5
Due year two	142.5
Due year three	124.9
Due year four	106.3
Due year five	90.1
Due year five	244.9
Total operating lease payments	888.2
Less: imputed interest	91.3
Total operating lease liabilities	$ 796.9