v3.22.0.1
Financial Instruments and Fair Value Measures - Bases Used to Measure The Approximate Fair Value of Financial Instruments (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Liabilities    
Carrying amount of investments in equity securities that do not have readily determinable fair values $ 149 $ 102
Book value    
Liabilities    
Short-term borrowings 14 34
Current portion of long-term debt and finance lease obligations, excluding fair value hedges 12,455 8,461
Long-term debt and finance lease obligations, excluding fair value hedges 64,113 77,283
Total liabilities 76,582 85,778
Estimate of Fair Value Measurement    
Liabilities    
Short-term borrowings 14 34
Current portion of long-term debt and finance lease obligations, excluding fair value hedges 11,830 8,542
Long-term debt and finance lease obligations, excluding fair value hedges 71,810 87,761
Total liabilities 83,654 96,337
Estimate of Fair Value Measurement | Quoted prices in active markets for identical assets (Level 1)    
Liabilities    
Short-term borrowings 0 0
Current portion of long-term debt and finance lease obligations, excluding fair value hedges 11,329 8,249
Long-term debt and finance lease obligations, excluding fair value hedges 70,757 86,137
Total liabilities 82,086 94,386
Estimate of Fair Value Measurement | Significant other observable inputs (Level 2)    
Liabilities    
Short-term borrowings 14 34
Current portion of long-term debt and finance lease obligations, excluding fair value hedges 501 293
Long-term debt and finance lease obligations, excluding fair value hedges 1,053 1,624
Total liabilities 1,568 1,951
Estimate of Fair Value Measurement | Significant unobservable inputs (Level 3)    
Liabilities    
Short-term borrowings 0 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