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Revolving Credit Facility and Commercial Paper Program (Details)
1 Months Ended 6 Months Ended
Apr. 30, 2022
USD ($)
currency
extension
Jun. 30, 2022
USD ($)
Jun. 30, 2021
Mar. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Credit facility          
Credit facility origination costs   $ 19,663,000     $ 4,352,000
Maximum aggregate capacity of commercial paper program   1,000,000,000      
Commercial paper borrowings outstanding   $ 950,000,000     901,400,000
Weighted average interest rate at the end of the period (as a percent)   1.80%      
Revolving credit facility | Unsecured debt          
Credit facility          
Maximum borrowing capacity       $ 3,000,000,000  
Credit facility origination costs   $ 19,700,000     4,400,000
Current borrowing capacity   4,030,000,000.00      
Outstanding balance   $ 219,100,000     $ 650,000,000
Weighted average borrowing rate during the period (as a percent)   1.50% 0.90%    
Weighted average interest rate at the end of the period (as a percent)   2.20%      
Revolving credit facility | Unsecured debt | Multicurrency Credit Facility          
Credit facility          
Maximum borrowing capacity $ 4,250,000,000        
Number of extensions | extension 2        
Term of extension option 6 months        
Number of currencies allowable per facility | currency 14        
Credit facility expansion option $ 1,000,000,000        
Revolving credit facility | Unsecured debt | Sterling Overnight Indexed Average (SONIA) | Multicurrency Credit Facility          
Credit facility          
Basis spread on variable rate (as a percent) 0.725%        
Basis spread on variable rate, adjustment chare (as a percent) 0.0326%        
Commitment fee (as a percent) 0.125%        
All-in drawn variable interest rate (as a percent) 0.8826%        
Revolving credit facility | Unsecured debt | Secured Overnight Financing Rate (SOFR) | Multicurrency Credit Facility          
Credit facility          
Basis spread on variable rate (as a percent) 0.725%        
Basis spread on variable rate, adjustment chare (as a percent) 0.10%        
Commitment fee (as a percent) 0.125%        
All-in drawn variable interest rate (as a percent) 0.95%        
Commercial paper          
Credit facility          
Weighted average borrowing rate during the period (as a percent)   0.80% 0.30%