Quarterly report pursuant to Section 13 or 15(d)

DEBT - Narrative (Details)

v3.20.2
DEBT - Narrative (Details)
1 Months Ended 6 Months Ended 12 Months Ended
Apr. 22, 2020
USD ($)
Nov. 15, 2019
USD ($)
Sep. 30, 2018
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2019
USD ($)
Sep. 30, 2019
extension
Aug. 31, 2018
USD ($)
Debt Instrument [Line Items]                  
Total debt       $ 4,403,700,000     $ 3,403,100,000    
Line of credit facility, potential maximum borrowing capacity     $ 1,600,000,000            
Letters of credit outstanding, amount       $ 700,000          
Commercial paper notes         $ 1,100,000,000        
Maximum                  
Debt Instrument [Line Items]                  
Debt instrument, term       1 year          
Commercial paper, maturity period range         397 days        
Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Debt instrument, term     5 years            
Credit facility borrowing capacity     $ 1,100,000,000           $ 900,000,000.0
Line of credit, maximum number of extensions | extension               2  
Line of credit facility, expiration date, extension period     1 year            
Outstanding borrowings       $ 0          
Line of credit facility, available for borrowing       1,100,000,000          
Commercial paper                  
Debt Instrument [Line Items]                  
Outstanding borrowings       0          
Notes, 2.60%, due December 2025                  
Debt Instrument [Line Items]                  
Total debt $ 400,000,000.0     $ 400,000,000.0     0    
Debt instrument, interest rate (as a percent) 2.60%     2.60%          
Debt instrument, term 5 years                
Notes, 3.1%, due May 2030                  
Debt Instrument [Line Items]                  
Total debt $ 600,000,000.0     $ 600,000,000.0     0    
Debt instrument, interest rate (as a percent) 3.10%     3.10%          
Debt instrument, term 10 years                
Notes, 2.60%, due December 2024                  
Debt Instrument [Line Items]                  
Total debt   $ 750,000,000.0   $ 750,000,000.0     $ 750,000,000.0    
Debt instrument, interest rate (as a percent)   2.60%   2.60%          
Debt instrument, term   5 years              
Commercial paper                  
Debt Instrument [Line Items]                  
Long-term debt       $ 0          
Receivables Securitization Facility                  
Debt Instrument [Line Items]                  
Debt instrument, term           2 years      
Credit facility borrowing capacity           $ 225,000,000.0      
Outstanding borrowings       0          
Collateral amount       $ 308,200,000