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LONG-TERM DEBT AND LINES OF CREDIT - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Feb. 26, 2021
Dec. 31, 2020
Debt Instrument [Line Items]            
Long-term debt $ 10,643,005   $ 10,643,005      
Interest expense 82,300 $ 82,100 242,900 $ 244,300    
Interest rate swap            
Debt Instrument [Line Items]            
Accumulated other comprehensive income (loss) related to interest rate 38,500   38,500      
Senior notes and term loans            
Debt Instrument [Line Items]            
Unamortized debt issuance costs 49,000   49,000      
Senior notes            
Debt Instrument [Line Items]            
Unamortized discount 8,700   8,700     $ 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 $ 10,800   $ 10,800      
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