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LONG-TERM DEBT AND LINE OF CREDIT - Additional Information (Details) - USD ($)
1 Months Ended
Mar. 31, 2020
Jan. 31, 2020
Mar. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]        
Line of credit, amount outstanding     $ 0 $ 0
Senior Unsecured Revolving Credit Facility        
Debt Instrument [Line Items]        
Debt, maturity date   2025-01    
Line of credit, maximum borrowing capacity   $ 1,500,000,000    
Line of credit expiration period   5 years    
4.00 percent due in April 2030        
Debt Instrument [Line Items]        
Debt issued $ 750,000,000      
Debt instrument, interest rate, stated percentage 4.00%      
Proceeds from debt, net of issuance costs $ 732,000,000      
Debt, maturity date 2030-04