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LONG-TERM DEBT AND LINES OF CREDIT - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Feb. 26, 2021
Dec. 31, 2020
Debt Instrument [Line Items]            
Long-term debt $ 10,151,041   $ 10,151,041      
Interest expense 79,000 $ 81,100 160,500 $ 162,200    
Interest rate swap            
Debt Instrument [Line Items]            
Accumulated other comprehensive income (loss) related to interest rate 38,400   38,400      
Senior Notes and Term Loans            
Debt Instrument [Line Items]            
Unamortized debt issuance costs 51,400   51,400      
Senior Notes            
Debt Instrument [Line Items]            
Unamortized discount 9,000   9,000     $ 8,500
Long-term debt 7,500,000   7,500,000      
Fair value of debt instrument $ 7,900,000   $ 7,900,000      
Senior Notes | 1.200% senior notes due March 1, 2026            
Debt Instrument [Line Items]            
Face amount of debt instrument         $ 1,100,000  
Stated interest rate (as a percent) 1.20%   1.20%   1.20%  
Debt issuance costs         $ 8,600  
Term Loans            
Debt Instrument [Line Items]            
Unamortized debt issuance costs           47,400
Unsecured Debt | Unsecured revolving credit facility            
Debt Instrument [Line Items]            
Unamortized debt issuance costs $ 11,700   $ 11,700      
Unsecured Debt | Unsecured term loan facility            
Debt Instrument [Line Items]            
Minimum leverage ratio 3.50   3.50      
Minimum interest coverage ratio 3.00   3.00      
Line of credit            
Debt Instrument [Line Items]            
Unamortized debt issuance costs           $ 13,800