v3.25.0.1
Post-Employment Benefits - Defined Benefit Pension Plan Assets (Details) - Defined benefit plans - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets $ 10,551 $ 9,839 $ 8,472
Fair value measured at Levels 1, 2 and 3      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets 3,631 3,795  
Fair value measured at Levels 1, 2 and 3 | U.S. large cap      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [1] 1,131 1,018  
Fair value measured at Levels 1, 2 and 3 | U.S. mid cap      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [2] 176 173  
Fair value measured at Levels 1, 2 and 3 | International      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [3] 408 488  
Fair value measured at Levels 1, 2 and 3 | U.S. government securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [4] 414 246  
Fair value measured at Levels 1, 2 and 3 | Corporate debt instruments      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [4] 609 714  
Fair value measured at Levels 1, 2 and 3 | Non-U.S. government securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [4] 346 461  
Fair value measured at Levels 1, 2 and 3 | Other fixed income securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [4] 20 126  
Fair value measured at Levels 1, 2 and 3 | Absolute return funds      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [5] 176 155  
Fair value measured at Levels 1, 2 and 3 | Other plan assets      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [6] 351 414  
Quoted prices in active markets for identical assets (Level 1)      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets 2,392 2,800  
Quoted prices in active markets for identical assets (Level 1) | U.S. large cap      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [1] 1,131 1,018  
Quoted prices in active markets for identical assets (Level 1) | U.S. mid cap      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [2] 176 173  
Quoted prices in active markets for identical assets (Level 1) | International      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [3] 408 488  
Quoted prices in active markets for identical assets (Level 1) | U.S. government securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [4] 18 62  
Quoted prices in active markets for identical assets (Level 1) | Corporate debt instruments      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [4] 29 155  
Quoted prices in active markets for identical assets (Level 1) | Non-U.S. government securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [4] 183 301  
Quoted prices in active markets for identical assets (Level 1) | Other fixed income securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [4] 15 124  
Quoted prices in active markets for identical assets (Level 1) | Absolute return funds      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [5] 82 66  
Quoted prices in active markets for identical assets (Level 1) | Other plan assets      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [6] 350 413  
Significant other observable inputs (Level 2)      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets 1,239 995  
Significant other observable inputs (Level 2) | U.S. large cap      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [1] 0 0  
Significant other observable inputs (Level 2) | U.S. mid cap      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [2] 0 0  
Significant other observable inputs (Level 2) | International      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [3] 0 0  
Significant other observable inputs (Level 2) | U.S. government securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [4] 396 184  
Significant other observable inputs (Level 2) | Corporate debt instruments      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [4] 580 559  
Significant other observable inputs (Level 2) | Non-U.S. government securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [4] 163 160  
Significant other observable inputs (Level 2) | Other fixed income securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [4] 5 2  
Significant other observable inputs (Level 2) | Absolute return funds      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [5] 94 89  
Significant other observable inputs (Level 2) | Other plan assets      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [6] 1 1  
Significant unobservable inputs (Level 3)      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets 0 0  
Significant unobservable inputs (Level 3) | U.S. large cap      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [1] 0 0  
Significant unobservable inputs (Level 3) | U.S. mid cap      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [2] 0 0  
Significant unobservable inputs (Level 3) | International      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [3] 0 0  
Significant unobservable inputs (Level 3) | U.S. government securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [4] 0 0  
Significant unobservable inputs (Level 3) | Corporate debt instruments      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [4] 0 0  
Significant unobservable inputs (Level 3) | Non-U.S. government securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [4] 0 0  
Significant unobservable inputs (Level 3) | Other fixed income securities      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [4] 0 0  
Significant unobservable inputs (Level 3) | Absolute return funds      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [5] 0 0  
Significant unobservable inputs (Level 3) | Other plan assets      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [6] 0 0  
Total assets measured at NAV      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets $ 6,920 $ 6,044  
[1] A mix of index funds and actively managed equity accounts that are benchmarked to various large cap indices.
[2] A mix of index funds and actively managed equity accounts that are benchmarked to various mid cap indices.
[3] A mix of index funds and actively managed equity accounts that are benchmarked to various non-U.S. equity indices in both developed and emerging markets.
[4] Securities held by actively managed accounts, index funds and mutual funds.
[5] Primarily funds having global mandates with the flexibility to allocate capital broadly across a wide range of asset classes and strategies, including but not limited to equities, fixed income, commodities, financial futures, currencies and other securities, with objectives to outperform agreed upon benchmarks of specific return and volatility targets.
[6] Investments in cash and cash equivalents.