Quarterly report pursuant to Section 13 or 15(d)

DEBT - Narrative (Details)

v3.20.1
DEBT - Narrative (Details)
3 Months Ended 6 Months Ended
Mar. 31, 2020
USD ($)
Mar. 31, 2019
USD ($)
extension
Jun. 30, 2018
Dec. 31, 2019
USD ($)
Nov. 15, 2019
USD ($)
Dec. 31, 2018
USD ($)
Aug. 31, 2018
USD ($)
Debt Instrument [Line Items]              
Total debt $ 3,528,100,000     $ 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 2024              
Debt Instrument [Line Items]              
Total debt $ 750,000,000.0     750,000,000.0 $ 750,000,000.0    
Debt, interest rate 2.60%            
Debt instrument, term     5 years        
Commercial paper              
Debt Instrument [Line Items]              
Total debt $ 0     $ 0      
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 125,000,000.0            
Collateral amount $ 276,100,000