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General (Narrative) (Details) - USD ($)
$ in Millions
Jun. 30, 2019
Apr. 01, 2019
Mar. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Operating Lease, Liabilities $ 179.9    
Operating Leases, Right-of-use assets $ 151.5   $ 0.0
Accounting for Leases      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Operating Lease, Liabilities   $ 187.2  
Operating Leases, Right-of-use assets   157.4  
Lease Incentives   $ 29.8