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Fair Value Measurement - Equity Securities Without Readily Determinable Fair Value (Details)
shares in Millions, $ in Millions
3 Months Ended
Apr. 08, 2024
shares
Mar. 31, 2024
USD ($)
shares
Mar. 31, 2023
USD ($)
Dec. 31, 2023
USD ($)
Fair Value Disclosures [Abstract]        
Carrying value   $ 4,467 $ 3,910 $ 4,500
Upward carrying value changes   20 35  
Downward carrying value changes/impairment   (59) $ (96)  
Cumulative upward carrying value changes   1,200    
Cumulative downward carrying value changes/impairment   $ (1,300)    
B-1 Shares | Subsequent Event        
Equity Securities without Readily Determinable Fair Value [Line Items]        
Conversion rate 0.5      
Issuance ratio 0.5      
VISA | B-1 Shares        
Equity Securities without Readily Determinable Fair Value [Line Items]        
Interest owned in equity securities without readily determinable fair value (in shares) | shares   37.2    
Conversion rate   1.5875    
VISA | B-1 Shares | Subsequent Event        
Equity Securities without Readily Determinable Fair Value [Line Items]        
Interest in equity securities without readily determinable fair value converted (in shares) | shares 37.2