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DEBT - Narrative (Details)
3 Months Ended 12 Months Ended
Nov. 13, 2018
USD ($)
Dec. 31, 2021
USD ($)
Sep. 30, 2021
USD ($)
letter_of_credit
Sep. 29, 2021
USD ($)
Sep. 27, 2021
Apr. 16, 2021
USD ($)
Dec. 20, 2018
USD ($)
Letters of Credit              
Debt Instrument [Line Items]              
Number of letters of credit outstanding | letter_of_credit     3        
Unsecured Senior Notes due September 29, 2031              
Debt Instrument [Line Items]              
Interest rate       2.90%      
Face amount of debt       $ 550,000,000      
Unsecured Senior Notes due March 19, 2025              
Debt Instrument [Line Items]              
Interest rate         4.65%   4.65%
Face amount of debt             $ 487,100,000
Unsecured Senior Notes due March 19, 2025 | Forecast              
Debt Instrument [Line Items]              
Make-whole premium and accrued interest   $ 58,100,000          
Write-off of unamortized discount and debt issuance costs   $ 3,700,000          
2018 Credit Facility              
Debt Instrument [Line Items]              
Maximum borrowing capacity $ 750,000,000            
Increase in aggregate commitments subject to satisfaction of certain commitments from new or existing lenders $ 300,000,000            
Commitment fee rate     0.125%        
Maximum limit of priority debt on net worth 17.50%            
Borrowings outstanding     $ 0        
Available borrowing capacity     $ 750,000,000        
2018 Credit Facility | Minimum              
Debt Instrument [Line Items]              
Commitment fee rate 0.075%            
2018 Credit Facility | Maximum              
Debt Instrument [Line Items]              
Commitment fee rate 0.20%            
Total debt to total capitalization ratio 50.00%            
2018 Credit Facility | LIBOR              
Debt Instrument [Line Items]              
Interest rate spread     1.125%        
2018 Credit Facility | LIBOR | Minimum              
Debt Instrument [Line Items]              
Interest rate spread 0.875%            
2018 Credit Facility | LIBOR | Maximum              
Debt Instrument [Line Items]              
Interest rate spread 1.50%            
2018 Credit Facility | Letters of Credit              
Debt Instrument [Line Items]              
Maximum borrowing capacity $ 75,000,000            
2018 Credit Facility, Due November 2025              
Debt Instrument [Line Items]              
Maximum borrowing capacity           $ 680,000,000  
2018 Credit Facility, Due November 2024              
Debt Instrument [Line Items]              
Maximum borrowing capacity           $ 70,000,000  
Letter of Credit - Instrument 1 | Letters of Credit              
Debt Instrument [Line Items]              
Letters of credit outstanding     $ 24,800,000        
Letter of Credit - Instrument 2 | Letters of Credit              
Debt Instrument [Line Items]              
Letters of credit outstanding     3,000,000        
Letter of Credit - Instrument 3 | Letters of Credit              
Debt Instrument [Line Items]              
Letters of credit outstanding     2,100,000        
Unsecured Standalone Line of Credit Facility              
Debt Instrument [Line Items]              
Maximum borrowing capacity     20,000,000        
Borrowings outstanding     $ 7,600,000