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Other Liabilities (Details) - USD ($)
$ in Millions
Jun. 30, 2019
Dec. 31, 2018
Other Liabilities Disclosure [Abstract]    
Operating lease liabilities $ 63.4 $ 0.0
Interest rate swap 48.9 10.7
Unrecognized tax benefits 19.8 19.6
Retirement benefits 12.7 10.2
Income tax payable 1.9 5.0
Deferred revenue 2.9 0.9
Contingent consideration 0.0 0.1
Other 0.7 8.2
Total other liabilities $ 150.3 $ 54.7