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Debt and Credit Facilities (Narrative) (Details) - USD ($)
1 Months Ended 12 Months Ended
Feb. 28, 2022
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Line of Credit Facility [Line Items]        
Commercial paper   $ 0    
Interest expense, debt   337,000,000 $ 337,000,000 $ 315,000,000
Term Loan Due February 22, 2025        
Line of Credit Facility [Line Items]        
Debt face amount $ 1,500,000,000      
Repayments of debt   650,000,000    
Term Loan Due February 22, 2025 | SOFR        
Line of Credit Facility [Line Items]        
Basis spread on variable rate 0.725%      
Credit Agreement | Revolving Credit Facility        
Line of Credit Facility [Line Items]        
Maximum borrowing capacity   $ 2,250,000,000 $ 1,500,000,000