Annual report pursuant to Section 13 and 15(d)

DEBT (Additional Information) (Details)

v3.8.0.1
DEBT (Additional Information) (Details)
3 Months Ended 12 Months Ended
May 16, 2016
USD ($)
May 12, 2016
USD ($)
Feb. 24, 2016
Dec. 17, 2012
USD ($)
Jun. 28, 2007
USD ($)
Dec. 31, 2017
USD ($)
extension
Dec. 31, 2017
USD ($)
extension
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Jul. 03, 2017
USD ($)
Debt Instrument [Line Items]                    
Long-term debt           $ 2,715,300,000 $ 2,715,300,000 $ 2,685,400,000    
Bridge loan, term 364 days   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      
Commercial paper, maturity date (less than)             90 days      
Cash paid for interest, net of capitalized interest             $ 96,900,000 85,000,000 $ 61,600,000  
Maximum                    
Debt Instrument [Line Items]                    
Commercial paper, maturity period range             397 days      
Revolver                    
Debt Instrument [Line Items]                    
Credit facility, borrowing capacity           900,000,000.0 $ 900,000,000.0      
Debt instrument, term             5 years      
Line of credit facility, potential maximum borrowing capacity           $ 1,200,000,000.0 $ 1,200,000,000.0      
Credit facility maturity date             Nov. 21, 2020      
Maximum number of extensions, maturity date | extension           2 2      
Credit facility, maturity date, extension period             1 year      
Long-term debt           $ 100,000,000 $ 100,000,000 0    
Credit facility, available for borrowings           221,900,000 221,900,000      
Long-term line of credit, borrowings outstanding           100,000,000 $ 100,000,000      
Term Loan                    
Debt Instrument [Line Items]                    
Term loan, maturity date             Nov. 21, 2018      
364 Day Revolver                    
Debt Instrument [Line Items]                    
Bridge loan             $ 800,000,000.0      
Bridge loan, term 364 days           364 days      
Debt, extinguished $ 475,000,000                  
Letter of Credit                    
Debt Instrument [Line Items]                    
Long-term debt           15,500,000 $ 15,500,000      
Commercial paper (CP)                    
Debt Instrument [Line Items]                    
Long-term debt           562,600,000 562,600,000 310,300,000    
Receivables Securitization Facility                    
Debt Instrument [Line Items]                    
Credit facility, borrowing capacity           $ 225,000,000 225,000,000      
Debt instrument, term           2 years        
Debt collateral           $ 204,300,000 204,300,000      
Notes, 2.30%, due June 2021                    
Debt Instrument [Line Items]                    
Long-term debt           $ 500,000,000 $ 500,000,000 500,000,000    
Long term debt, interest rate           2.30% 2.30%      
Notes, 2.30%, due June 2021 | Senior Notes                    
Debt Instrument [Line Items]                    
Debt instrument, term   5 years                
Long-term debt   $ 500,000,000.0                
Long term debt, interest rate   2.30%                
Notes, 3.25%, due June 2026                    
Debt Instrument [Line Items]                    
Long-term debt           $ 275,000,000 $ 275,000,000 275,000,000    
Long term debt, interest rate           3.25% 3.25%      
Notes, 3.25%, due June 2026 | Senior Notes                    
Debt Instrument [Line Items]                    
Debt instrument, term   10 years                
Long-term debt   $ 275,000,000.0                
Long term debt, interest rate   3.25%                
Notes, 6.30%, due July 2017                    
Debt Instrument [Line Items]                    
Long-term debt           $ 0 $ 0 272,500,000    
Long term debt, interest rate           6.30% 6.30%      
Notes, 6.30%, due July 2017 | Senior Notes                    
Debt Instrument [Line Items]                    
Debt instrument, term         10 years          
Long-term debt         $ 300,000,000.0         $ 0
Long term debt, interest rate         6.30%          
Notes, 7.00%, due July 2037                    
Debt Instrument [Line Items]                    
Long-term debt           $ 250,000,000 $ 250,000,000 250,000,000    
Long term debt, interest rate           7.00% 7.00%      
Notes, 7.00%, due July 2037 | Senior Notes                    
Debt Instrument [Line Items]                    
Debt instrument, term         30 years          
Long-term debt         $ 250,000,000.0         $ 0
Long term debt, interest rate         7.00%          
Notes, 3.30%, due Dec 2022                    
Debt Instrument [Line Items]                    
Long-term debt           $ 500,000,000 $ 500,000,000 500,000,000    
Long term debt, interest rate           3.30% 3.30%      
Notes, 3.30%, due Dec 2022 | Senior Notes                    
Debt Instrument [Line Items]                    
Debt instrument, term       10 years            
Long-term debt       $ 500,000,000.0            
Long term debt, interest rate       3.30%            
Debentures, 6.90%, due July 2028                    
Debt Instrument [Line Items]                    
Long-term debt           $ 125,000,000 $ 125,000,000 $ 125,000,000    
Long term debt, interest rate           6.90% 6.90%