Annual report pursuant to Section 13 and 15(d)

DEBT - Narrative (Details)

v3.10.0.1
DEBT - Narrative (Details)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
May 16, 2016
USD ($)
May 12, 2016
USD ($)
Dec. 17, 2012
USD ($)
Jun. 28, 2007
USD ($)
May 31, 2018
USD ($)
Dec. 31, 2018
USD ($)
Sep. 30, 2018
USD ($)
extension
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Aug. 31, 2018
USD ($)
Debt Instrument [Line Items]                      
Long-term debt           $ 2,654,900,000   $ 2,654,900,000      
Line of credit facility, potential maximum borrowing capacity             $ 1,600,000,000.00        
Letters of credit outstanding           $ 15,500,000   $ 15,500,000      
Bridge loan, term 364 days                    
Maximum leverage ratio (not more than)           3.5   3.5      
Leverage ratio, maximum allowed increase following a material acquisition           0.5   0.5      
Leverage ratio, maximum allowed following a material acquisition           4.0   4.0      
Commercial paper notes           $ 900,000,000.0   $ 900,000,000.0      
Debt outstanding           $ 2,654,900,000   2,654,900,000 $ 2,715,300,000    
Cash paid for interest, net of capitalized interest               $ 88,200,000 96,900,000 $ 85,000,000  
Maximum                      
Debt Instrument [Line Items]                      
Commercial paper, maturity period range               397 days      
Notes, 3.60%, due Aug 2021                      
Debt Instrument [Line Items]                      
Long-term debt         $ 300,000,000.0            
Long term debt, interest rate         3.60% 3.60%   3.60%      
Debt outstanding           $ 300,000,000   $ 300,000,000 0    
Notes, 3.95%, due May 2023                      
Debt Instrument [Line Items]                      
Long-term debt         $ 400,000,000.0            
Long term debt, interest rate         3.95% 3.95%   3.95%      
Debt outstanding           $ 400,000,000   $ 400,000,000 0    
Notes, Floating Rate, due Aug 2021                      
Debt Instrument [Line Items]                      
Long-term debt         $ 300,000,000.0            
Debt outstanding           300,000,000   300,000,000 0    
Revolver                      
Debt Instrument [Line Items]                      
Long-term line of credit, borrowings outstanding           0   0      
Credit facility, available for borrowings           1,080,000,000   1,080,000,000      
Debt outstanding           0   0 100,000,000    
Commercial Paper                      
Debt Instrument [Line Items]                      
Debt outstanding           0   0 562,600,000    
Revolver 364 Day                      
Debt Instrument [Line Items]                      
Bridge loan               $ 800,000,000.0      
Bridge loan, term 364 days             364 days      
Debt, extinguished $ 475,000,000                    
Receivables Securitization Facility                      
Debt Instrument [Line Items]                      
Credit facility, borrowing capacity           $ 225,000,000.0   $ 225,000,000.0      
Debt instrument, term           2 years          
Debt collateral           $ 209,800,000   $ 209,800,000      
Notes, 2.30%, due June 2021                      
Debt Instrument [Line Items]                      
Long term debt, interest rate           2.30%   2.30%      
Debt outstanding           $ 500,000,000   $ 500,000,000 500,000,000    
Notes, 2.30%, due June 2021 | Senior Notes                      
Debt Instrument [Line Items]                      
Long-term debt   $ 500,000,000.0                  
Long term debt, interest rate   2.30%                  
Debt instrument, term   5 years                  
Notes, 3.25%, due June 2026                      
Debt Instrument [Line Items]                      
Long term debt, interest rate           3.25%   3.25%      
Debt outstanding           $ 275,000,000   $ 275,000,000 275,000,000    
Notes, 3.25%, due June 2026 | Senior Notes                      
Debt Instrument [Line Items]                      
Long-term debt   $ 275,000,000.0                  
Long term debt, interest rate   3.25%                  
Debt instrument, term   10 years                  
Notes, 6.30%, due July 2017 | Senior Notes                      
Debt Instrument [Line Items]                      
Long-term debt       $ 300,000,000.0              
Long term debt, interest rate       6.30%              
Debt instrument, term       10 years              
Notes, 7.00%, due July 2037                      
Debt Instrument [Line Items]                      
Long term debt, interest rate           7.00%   7.00%      
Debt outstanding           $ 250,000,000   $ 250,000,000 250,000,000    
Notes, 7.00%, due July 2037 | Senior Notes                      
Debt Instrument [Line Items]                      
Long-term debt       $ 250,000,000.0              
Long term debt, interest rate       7.00%              
Debt instrument, term       30 years              
Notes, 3.30%, due Dec 2022                      
Debt Instrument [Line Items]                      
Long term debt, interest rate           3.30%   3.30%      
Debt outstanding           $ 500,000,000   $ 500,000,000 500,000,000    
Notes, 3.30%, due Dec 2022 | Senior Notes                      
Debt Instrument [Line Items]                      
Long-term debt     $ 500,000,000.0                
Long term debt, interest rate     3.30%                
Debt instrument, term     10 years                
Debentures, 6.90%, due July 2028                      
Debt Instrument [Line Items]                      
Long-term debt           $ 125,000,000   $ 125,000,000      
Long term debt, interest rate           6.90%   6.90%      
Debt outstanding           $ 125,000,000   $ 125,000,000 $ 125,000,000    
London Interbank Offered Rate (LIBOR) | Notes, Floating Rate, due Aug 2021                      
Debt Instrument [Line Items]                      
Debt instrument, basis spread on variable rate         0.87%            
Term Loan                      
Debt Instrument [Line Items]                      
Credit facility, borrowing capacity             $ 800,000,000.0        
Debt instrument, term             3 years        
Revolver                      
Debt Instrument [Line Items]                      
Credit facility, borrowing capacity             $ 1,100,000,000.00       $ 900,000,000
Debt instrument, term             5 years        
Maximum number of extensions, maturity date | extension             2        
Credit facility, maturity date, extension period             1 year        
Commercial Paper                      
Debt Instrument [Line Items]                      
Long-term line of credit, borrowings outstanding             $ 0