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Leases - ROU Asset and Lease Liability (Details) - USD ($)
$ in Millions
Mar. 31, 2020
Dec. 31, 2019
Assets    
Operating lease ROU assets $ 155.8 $ 164.7
Liabilities    
Operating lease current liabilities 28.0 31.5
Operating lease noncurrent liabilities $ 156.1 $ 163.2