v3.25.4
Post-Employment Benefits - Defined Benefit Pension Plan Assets (Details) - Defined benefit plans - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets $ 12,204 $ 10,551 $ 9,839
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 4,275 3,631  
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] 1,376 1,131  
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] 130 176  
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] 573 408  
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] 405 414  
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] 668 609  
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] 447 346  
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] 56 20  
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] 152 176  
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] 468 351  
Level 1      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets 2,853 2,392  
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] 1,376 1,131  
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] 130 176  
Level 1 | International      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [3] 573 408  
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] 6 18  
Level 1 | Corporate debt instruments      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [4] 84 29  
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] 146 183  
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] 51 15  
Level 1 | Absolute return funds      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [5] 20 82  
Level 1 | Other plan assets      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [6] 467 350  
Level 2      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets 1,422 1,239  
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  
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  
Level 2 | International      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [3] 0 0  
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] 399 396  
Level 2 | Corporate debt instruments      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [4] 584 580  
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] 301 163  
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 5  
Level 2 | Absolute return funds      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [5] 132 94  
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  
Level 3      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets 0 0  
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  
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  
Level 3 | International      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Fair value of plan assets [3] 0 0  
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  
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  
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  
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  
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  
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 $ 7,929 $ 6,920  
[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 equivalents.