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Lease Obligations (Narrative) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Operating lease right-of-use assets $ 192.6 $ 161.6    
Lease Liability 197.5 $ 164.5    
Operating leases not yet commenced 7.3      
Finance lease, not yet commenced $ 0.8      
Lease term, operating leases not yet commenced 6 years      
Lease term, finance leases not yet commenced 7 years      
ECS        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Operating lease right-of-use assets     $ 24.0  
Lease Liability     21.6  
Favorable lease position     $ 2.4  
Accounting Standards Update 2018-11        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Operating lease right-of-use assets       $ 135.9
Lease Liability       $ 135.8