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Leases (Narrative) (Details)
$ in Millions
Sep. 30, 2019
USD ($)
Lessee, Lease, Description [Line Items]  
Lease expense, noncancelable operating leases $ 72.1
Minimum  
Lessee, Lease, Description [Line Items]  
Lessor, operating lease, renewal term 1 year
Maximum  
Lessee, Lease, Description [Line Items]  
Lessor, operating lease, renewal term 10 years