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Significant Accounting Policies and Practices - Narrative (Details)
$ in Millions
1 Months Ended 3 Months Ended
Oct. 31, 2014
Mar. 31, 2017
USD ($)
voting_interest_model_entity
variable_interest_entity
partnership
Mar. 31, 2016
USD ($)
Dec. 31, 2016
USD ($)
Restricted Cash and Investments [Abstract]        
Restricted cash and cash equivalents   $ 0.6   $ 0.3
Financial Instruments        
Book overdrafts   $ 28.3   $ 36.5
Equity Investments in Unconsolidated Entities        
Number of ownership interest entities | partnership   29    
Equity earnings in related investments   $ 0.7 $ 0.5  
Ownership percentage 30.00%      
Recently Issued Accounting Policies [Abstract]        
Recognized excess tax benefit   $ 0.5    
Minimum        
Equity Investments in Unconsolidated Entities        
Voting interest ownership percentage   30.00%    
Maximum        
Equity Investments in Unconsolidated Entities        
Voting interest ownership percentage   50.00%    
Primary Beneficiary        
Equity Investments in Unconsolidated Entities        
Number of ownership interest entities | variable_interest_entity   21    
Not Primary Beneficiary        
Equity Investments in Unconsolidated Entities        
Number of ownership interest entities | voting_interest_model_entity   8    
Additional Paid-in Capital [Member] | Accounting Standards Update 2016-09, Forfeiture Rate Component | New Accounting Pronouncement, Early Adoption, Effect        
Recently Issued Accounting Policies [Abstract]        
Recognition of cumulative forfeitures as a result of new accounting pronouncements     $ 0.3