v3.5.0.2
DEBT Narrative (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
$1.5 billion revolving credit agreement    
Debt Instrument [Line Items]    
Maximum borrowing capacity $ 1,500.0  
Term 5 years  
Line of credit facility, increase (decrease), net $ 109.6  
Interest rate at period end 2.30%  
Long-term debt $ 992.2  
Covenant terms our consolidated debt coverage ratio (as defined in the Revolving Credit Agreement) could not exceed 5.00-to-1.00  
Current remaining borrowing capacity $ 491.9  
Letters of credit issued 15.8  
GoZone Bonds    
Debt Instrument [Line Items]    
Long-term debt $ 365.4  
Interest rate at period end 0.90%  
Amount received from trustee $ 12.0 $ 13.6
Amount remaining in trust 42.8  
Receivables Financing Agreement    
Debt Instrument [Line Items]    
Maximum borrowing capacity 125.0  
Long-term debt $ 43.2  
Borrowing capacity, description The amount available for borrowing is based on the availability of eligible receivables and other customary factors and conditions.  
Maturity date description The Securitization Program has an initial termination date of June 15, 2018, with the option to renew for additional 364-day periods thereafter.  
Collateral amount $ 102.5