v3.25.2
Debt - Narrative (Details) - USD ($)
6 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Line of Credit Facility [Line Items]    
Short term debt $ 1,850,000,000 $ 3,027,000,000
India Subsidiaries    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity 14,000,000  
Amount of debt outstanding 0  
Revolving Credit Facility    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity 3,900,000,000  
Additional borrowing capacity 1,000,000,000  
Amount of debt outstanding 0  
Currently available for borrowing 3,900,000,000  
Amount required to stop broker-dealer subsidiary commitments 173,000,000  
Funds available to use for working capital and general and corporate purposes $ 3,100,000,000  
Revolving Credit Facility | Commercial Paper    
Line of Credit Facility [Line Items]    
Weighted average interest rate 4.60%  
Short term debt $ 601,000,000  
Repayments of commercial paper $ 72,000,000  
Weighted average remaining maturity 15 days  
Senior Notes    
Line of Credit Facility [Line Items]    
Debt instrument, face amount $ 18,600,000,000  
Debt instrument, term 14 years  
Weighted average interest rate 3.70%  
Senior Notes | 2031 Senior Notes (5.25%; unsecured due June 15, 2031)    
Line of Credit Facility [Line Items]    
Interest rate, stated percentage 5.25%  
Senior notes $ 744,000,000 743,000,000
Senior Notes | 2028 Senior Notes (3.625%; unsecured due September 1, 2028)    
Line of Credit Facility [Line Items]    
Interest rate, stated percentage 3.625%  
Senior notes $ 946,000,000 $ 937,000,000