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Debt - Narrative (Details)
£ in Billions
3 Months Ended
Mar. 08, 2024
USD ($)
Mar. 08, 2024
GBP (£)
Mar. 07, 2024
USD ($)
Mar. 07, 2024
GBP (£)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Dec. 31, 2024
USD ($)
Debt Instrument              
Other long-term debt         $ (219,000,000)   $ (228,000,000)
Weighted average interest rate, excluding cross currency interest rate swaps         3.60%    
Debt, weighted average interest rate         2.90%    
Repayments of long-term debt         $ 12,029,000,000 $ 21,379,000,000  
Loss on extinguishment of debt         0 $ 174,000,000  
Difference in carrying value and fair value of long term debt         777,000,000   $ 806,000,000
Revolving Credit Facility              
Debt Instrument              
Borrowing capacity remaining         3,200,000,000    
Line of credit facility, capacity backstopped         1,108,000,000    
Commercial Paper              
Debt Instrument              
Commercial paper         4,500,000,000    
Credit facility outstanding         152,000,000    
Line of Credit | Revolving Credit Facility              
Debt Instrument              
Mandatory principal payment         $ 0    
Senior Notes              
Debt Instrument              
Loss on extinguishment of debt $ 174,000,000   $ 174,000,000        
Senior USD Notes | Senior Notes              
Debt Instrument              
Repayments of long-term debt $ 1,500,000,000   $ 1,500,000,000        
Senior USD Notes | Senior Notes | Minimum              
Debt Instrument              
Interest rates         1.20%    
Senior USD Notes | Senior Notes | Maximum              
Debt Instrument              
Interest rates         5.60%    
Senior GBP Notes | Senior Notes              
Debt Instrument              
Repayments of long-term debt | £   £ 1.0   £ 1.0      
Senior GBP Notes | Senior Notes | Minimum              
Debt Instrument              
Interest rates         2.30%    
Senior GBP Notes | Senior Notes | Maximum              
Debt Instrument              
Interest rates         3.40%    
Senior Euro Floating Rates Notes | Senior Notes | Minimum              
Debt Instrument              
Interest rates 2.25% 2.25% 2.25% 2.25%      
Senior Euro Floating Rates Notes | Senior Notes | Maximum              
Debt Instrument              
Interest rates 5.625% 5.625% 5.625% 5.625%