Quarterly report pursuant to Section 13 or 15(d)

Debt (Details)

v3.23.2
Debt (Details) - USD ($)
 6 Months Ended
May 17, 2023
Feb. 28, 2023
Aug. 12, 2020
Jun. 30, 2023
Dec. 31, 2022
3.125% Exchangeable Senior Debentures due 2053          
Debt disclosures          
Carrying value       $ 1,233,000,000  
Principal amount   $ 1,265,000,000      
Interest rate (as a percent)   3.125%   3.125% 3.125%
Shares attributable to debentures per $1,000 original principal amount of Debentures   1.8901      
Total shares attributable to debentures   2,390,977      
Debt instrument, face amount per debenture   $ 1,000      
Exchange price of shares attributable to debentures   $ 529.07      
Percentage of redemption and purchase price   100.00%      
Exchangeable Senior Debentures Option          
Debt disclosures          
Principal amount   $ 165,000,000      
2.75% Exchangeable Senior Debentures due 2050          
Debt disclosures          
Carrying value         $ 560,000,000
Interest rate (as a percent)       2.75% 2.75%
1.25% Exchangeable Senior Debentures due 2050          
Debt disclosures          
Carrying value       $ 2,000,000 $ 798,000,000
Interest rate (as a percent)       1.25% 1.25%
1.75% Exchangeable Senior Debentures due 2046          
Debt disclosures          
Carrying value         $ 15,000,000
Interest rate (as a percent)       1.75% 1.75%
Line of credit          
Debt disclosures          
Carrying value       $ 396,000,000 $ 397,000,000
SPV | Margin Loan Facility          
Debt disclosures          
Carrying value       $ 1,475,000,000 $ 1,400,000,000
Number of business days prior to the maturity date       5 days  
Remaining borrowing capacity       $ 825,000,000  
SPV | Margin Loan Facility | Charter. | Asset Pledged as Collateral          
Debt disclosures          
Shares owned       37,300,000  
Value of pledged collateral       $ 13,700,000,000  
SPV | Margin Loan Facility | Three-month LIBOR          
Debt disclosures          
Interest rate basis     three-month LIBOR    
Basis spread on variable rate     1.50%    
SPV | Margin Loan Facility | SOFR          
Debt disclosures          
Interest rate basis three-month SOFR        
Basis spread on variable rate 1.875%        
SPV | Term loan          
Debt disclosures          
Carrying value $ 1,150,000,000        
SPV | Revolving Credit Facility          
Debt disclosures          
Maximum borrowing capacity 1,150,000,000        
SPV | Uncommitted Incremental Term Loan Facility          
Debt disclosures          
Maximum borrowing capacity $ 200,000,000