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Financial Instruments - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Mar. 31, 2024
Derivative [Line Items]      
Derivative, notional amount $ 42,360 $ 38,560  
Pretax net unrealized gain on derivatives maturing within the next 12 months estimated to be reclassified from AOCI to sales 16    
Equity investments without readily determinable fair values 872   $ 851
Unrealized gains recognized on investments in equity securities without readily determinable fair value     4
Unrealized losses recognized on investments in equity securities without readily determinable fair values 11   5
Cumulative unrealized gains on investments 309    
Cumulative unrealized losses on investments 118    
Loss (income) from investments in equity securities, net (90)   (143)
Fair value of loans payable and long-term debt, including current portion 30,600 32,600  
Debt, carrying amount 34,800 37,100  
Factored accounts receivable 1,700 2,100  
Cash collateral received from counterparties 23 165  
Equity Funds      
Derivative [Line Items]      
Equity securities held through ownership interest in investments funds 249   396
Loss (income) from investments in equity securities, net 23   $ 2
Accounts Receivable Factoring Collections      
Derivative [Line Items]      
Restricted cash 39 55  
Level 2      
Derivative [Line Items]      
Cash equivalents 7,900 12,300  
Interest rate swap contracts | 4.50% note due 2033      
Derivative [Line Items]      
Derivative, notional amount 1,500    
Interest rate swap contracts | 5.00% note due 2053      
Derivative [Line Items]      
Derivative, notional amount 250    
Derivatives Designated as Hedging Instruments      
Derivative [Line Items]      
Derivative, notional amount 13,838 12,465  
Derivatives Not Designated as Hedging Instruments      
Derivative [Line Items]      
Derivative, notional amount $ 28,522 $ 26,095  
Maximum | Derivatives Designated as Hedging Instruments      
Derivative [Line Items]      
Maximum average period of maturities of contracts in years (less than) 2 years    
Maximum | Derivatives Not Designated as Hedging Instruments      
Derivative [Line Items]      
Maximum average period of maturities of contracts in years (less than) 6 months