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Debt - Senior Secured Credit Facilities (Details) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Jan. 24, 2020
May 15, 2019
Feb. 05, 2018
Feb. 28, 2018
Dec. 31, 2017
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
May 19, 2019
Debt Instrument                  
Debt instrument, face amount           $ 6,850,000,000   $ 6,850,000,000  
Total net debt to adjusted asset ratio (not more than)   0.65              
Permitted acquisitions consummated (not more than)   0.70              
EBITDA to interest charges (not less than)   2.00              
Proceeds from offering of common stock, net           0 $ 199,877,000    
Revolving Credit Facility                  
Debt Instrument                  
Debt instrument, face amount   $ 1,200,000,000     $ 400,000,000.0        
Total net debt to adjusted asset ratio (not more than)   0.75              
Percentage of utilization of credit facility   30.00%              
Repayment of revolving credit facility       $ 300,000,000.0          
Minimum | Revolving Credit Facility                  
Debt Instrument                  
Interest rate, stated percentage   0.375%              
Maximum | Revolving Credit Facility                  
Debt Instrument                  
Interest rate, stated percentage   0.50%              
LIBOR | Minimum | Revolving Credit Facility                  
Debt Instrument                  
Basis spread on variable rate (percent)   1.75%              
LIBOR | Maximum | Revolving Credit Facility                  
Debt Instrument                  
Basis spread on variable rate (percent)   2.00%              
Base Rate | Minimum | Revolving Credit Facility                  
Debt Instrument                  
Basis spread on variable rate (percent)   0.75%              
Base Rate | Maximum | Revolving Credit Facility                  
Debt Instrument                  
Basis spread on variable rate (percent)   1.00%              
Senior Notes                  
Debt Instrument                  
Percentage of funds from operations (not more than) 95.00%                
Percentage of adjusted total assets 0.60%                
Amount of adjusted total assets $ 30,000,000.0                
Senior Notes | Revolving Credit Facility                  
Debt Instrument                  
Debt instrument, face amount           $ 0   $ 0  
Maximum borrowing capacity   $ 600,000,000.0             $ 1,000,000,000.0
Senior Notes | LIBOR | Revolving Credit Facility                  
Debt Instrument                  
Basis spread on variable rate (percent)           2.00%   200.00%  
Term B Loan Facility                  
Debt Instrument                  
Debt instrument, face amount         $ 2,200,000,000        
Repayments of debt       $ 100,000,000.0          
Percentage of amortization of principal amount per annum       1.00%          
Term B Loan Facility | Revolving Credit Facility                  
Debt Instrument                  
Proceeds from offering of common stock, net       $ 1,300,000,000          
Term B Loan Facility | LIBOR | Revolving Credit Facility                  
Debt Instrument                  
Basis spread on variable rate (percent)     2.00%   2.25%        
Term B Loan Facility | LIBOR | Minimum | Revolving Credit Facility                  
Debt Instrument                  
Basis spread on variable rate (percent) 1.75%         1.75%      
Term B Loan Facility | LIBOR | Maximum | Revolving Credit Facility                  
Debt Instrument                  
Basis spread on variable rate (percent) 2.00%         2.00%      
Term B Loan Facility | Base Rate | Minimum | Revolving Credit Facility                  
Debt Instrument                  
Basis spread on variable rate (percent)           0.75%      
Term B Loan Facility | Base Rate | Maximum | Revolving Credit Facility                  
Debt Instrument                  
Basis spread on variable rate (percent)           1.00%      
Term B Loan Facility | Senior Notes                  
Debt Instrument                  
Debt instrument, face amount           $ 2,100,000,000   $ 2,100,000,000  
Term B Loan Facility | Senior Notes | LIBOR                  
Debt Instrument                  
Basis spread on variable rate (percent)           1.75%   175.00%