v3.24.1.u1
Financial Instruments and Fair Value Measures - Bases Used To Measure The Approximate Fair Values Of Financial Instruments (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Liabilities    
Carrying amount of investments in equity securities that do not have readily determinable fair values $ 161 $ 159
Quoted prices in active markets for identical assets (Level 1)    
Liabilities    
Current portion of long-term debt and finance lease obligations, excluding fair value hedges 9,687 6,862
Long-term debt and finance lease obligations, excluding fair value hedges 60,469 48,983
Total liabilities 70,156 55,845
Book value    
Liabilities    
Short-term borrowings 3  
Current portion of long-term debt and finance lease obligations, excluding fair value hedges 10,194 7,191
Long-term debt and finance lease obligations, excluding fair value hedges 64,140 52,460
Total liabilities 74,337 59,651
Approximate fair value    
Liabilities    
Short-term borrowings 3  
Current portion of long-term debt and finance lease obligations, excluding fair value hedges 10,021 7,069
Long-term debt and finance lease obligations, excluding fair value hedges 60,887 49,541
Total liabilities 70,911 56,610
Approximate fair value | Quoted prices in active markets for identical assets (Level 1)    
Liabilities    
Short-term borrowings 0  
Approximate fair value | Significant other observable inputs (Level 2)    
Liabilities    
Short-term borrowings 3  
Current portion of long-term debt and finance lease obligations, excluding fair value hedges 334 207
Long-term debt and finance lease obligations, excluding fair value hedges 418 558
Total liabilities 755 765
Approximate fair value | Significant unobservable inputs (Level 3)    
Liabilities    
Short-term borrowings 0  
Current portion of long-term debt and finance lease obligations, excluding fair value hedges 0 0
Long-term debt and finance lease obligations, excluding fair value hedges 0 0
Total liabilities $ 0 $ 0