Annual report [Section 13 and 15(d), not S-K Item 405]

COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Fair Values of U.S. Pension and Postretirement Benefit Plan Assets by Asset Category as Well as the Percentage That Each Category Comprises of Total Plan Assets and the Respective Target Allocations (Details)

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COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Fair Values of U.S. Pension and Postretirement Benefit Plan Assets by Asset Category as Well as the Percentage That Each Category Comprises of Total Plan Assets and the Respective Target Allocations (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 45,634 $ 43,396  
Cash held as collateral 1,600 2,700  
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 20,706 22,250  
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 14,838 10,941  
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 97 62 $ 80
United States      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 43,761 $ 41,618  
Percentage of Plan Assets 100.00% 100.00%  
United States | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 3,649 $ 5,716  
Percentage of Plan Assets 8.30% 13.70%  
United States | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 6,842 $ 6,979  
Percentage of Plan Assets 15.60% 16.80%  
United States | Fixed income securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 21,080 $ 19,643  
Percentage of Plan Assets 48.20% 47.20%  
United States | Other Investments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 12,173 $ 11,216  
United States | Hedge funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 3,728 $ 2,034  
Percentage of Plan Assets 8.50% 4.90%  
United States | Real estate      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 2,067 $ 2,674  
Percentage of Plan Assets 4.70% 6.40%  
United States | Private equity, private debt, and other investments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 6,378 $ 6,508  
Percentage of Plan Assets 14.60% 15.60%  
United States | Derivatives and Other Instruments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 17 $ (1,936)  
United States | Equity risk      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ (43) $ (392)  
Percentage of Plan Assets (0.10%) (0.90%)  
United States | Interest rate risk      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ (9) $ (1,619)  
Percentage of Plan Assets 0.00% (3.90%)  
United States | Other Risk      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 69 $ 75  
Percentage of Plan Assets 0.20% 0.20%  
United States | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 20,293 $ 21,857  
United States | Level 1 | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,427 5,450  
United States | Level 1 | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,834 3,270  
United States | Level 1 | Fixed income securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 13,218 13,375  
United States | Level 1 | Other Investments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 301  
United States | Level 1 | Hedge funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Level 1 | Real estate      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 301  
United States | Level 1 | Private equity, private debt, and other investments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Level 1 | Derivatives and Other Instruments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets (186) (539)  
United States | Level 1 | Equity risk      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets (17) (99)  
United States | Level 1 | Interest rate risk      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets (169) (442)  
United States | Level 1 | Other Risk      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 2  
United States | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 13,452 9,634  
United States | Level 2 | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 222 266  
United States | Level 2 | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,008 3,709  
United States | Level 2 | Fixed income securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 7,805 6,247  
United States | Level 2 | Other Investments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,214 810  
United States | Level 2 | Hedge funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,097 538  
United States | Level 2 | Real estate      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 77  
United States | Level 2 | Private equity, private debt, and other investments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 117 195  
United States | Level 2 | Derivatives and Other Instruments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 203 (1,398)  
United States | Level 2 | Equity risk      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets (26) (294)  
United States | Level 2 | Interest rate risk      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 160 (1,177)  
United States | Level 2 | Other Risk      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 69 73  
United States | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 57 21  
United States | Level 3 | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Level 3 | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Level 3 | Fixed income securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 57 21  
United States | Level 3 | Other Investments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Level 3 | Hedge funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Level 3 | Real estate      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Level 3 | Private equity, private debt, and other investments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Level 3 | Derivatives and Other Instruments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Level 3 | Equity risk      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Level 3 | Interest rate risk      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
United States | Level 3 | Other Risk      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0 $ 0  
United States | Minimum | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 1.00% 1.00%  
United States | Minimum | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 15.00% 15.00%  
United States | Minimum | Fixed income securities      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 30.00% 30.00%  
United States | Minimum | Hedge funds      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 3.00% 3.00%  
United States | Minimum | Real estate      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 3.00% 3.00%  
United States | Minimum | Private equity, private debt, and other investments      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 5.00% 5.00%  
United States | Maximum | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 7.00% 7.00%  
United States | Maximum | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 45.00% 45.00%  
United States | Maximum | Fixed income securities      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 73.00% 73.00%  
United States | Maximum | Hedge funds      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 13.00% 13.00%  
United States | Maximum | Real estate      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 15.00% 15.00%  
United States | Maximum | Private equity, private debt, and other investments      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 29.00% 29.00%  
International Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 1,873 $ 1,778  
International Pension Benefits | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 131 $ 127  
Percentage of Plan Assets 7.00% 7.10%  
International Pension Benefits | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 179 $ 165  
Percentage of Plan Assets 9.50% 9.30%  
International Pension Benefits | Fixed income securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 1,259 $ 1,202  
Percentage of Plan Assets 67.20% 67.60%  
International Pension Benefits | Real estate      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 67 $ 62  
Percentage of Plan Assets 3.60% 3.50%  
International Pension Benefits | Private equity, private debt, and other investments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 237 $ 222  
Percentage of Plan Assets 12.70% 12.50%  
International Pension Benefits | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 1,873 $ 1,778  
Percentage of Plan Assets 100.00% 100.00%  
International Pension Benefits | Level 1 | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 131 $ 127  
International Pension Benefits | Level 1 | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 28 23  
International Pension Benefits | Level 1 | Fixed income securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 254 243  
International Pension Benefits | Level 1 | Real estate      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Pension Benefits | Level 1 | Private equity, private debt, and other investments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Pension Benefits | Level 1 | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 413 393  
International Pension Benefits | Level 2 | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Pension Benefits | Level 2 | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 151 142  
International Pension Benefits | Level 2 | Fixed income securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,005 959  
International Pension Benefits | Level 2 | Real estate      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 19 17  
International Pension Benefits | Level 2 | Private equity, private debt, and other investments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 211 189  
International Pension Benefits | Level 2 | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,386 1,307  
International Pension Benefits | Level 3 | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Pension Benefits | Level 3 | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Pension Benefits | Level 3 | Fixed income securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
International Pension Benefits | Level 3 | Real estate      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 24 23  
International Pension Benefits | Level 3 | Private equity, private debt, and other investments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 16 18  
International Pension Benefits | Level 3 | Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 40 $ 41  
International Pension Benefits | Minimum | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 1.00% 1.00%  
International Pension Benefits | Minimum | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 1.00% 1.00%  
International Pension Benefits | Minimum | Fixed income securities      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 50.00% 50.00%  
International Pension Benefits | Minimum | Real estate      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 1.00% 1.00%  
International Pension Benefits | Minimum | Private equity, private debt, and other investments      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 10.00% 10.00%  
International Pension Benefits | Maximum | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 10.00% 10.00%  
International Pension Benefits | Maximum | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 10.00% 10.00%  
International Pension Benefits | Maximum | Fixed income securities      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 75.00% 75.00%  
International Pension Benefits | Maximum | Real estate      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 10.00% 10.00%  
International Pension Benefits | Maximum | Private equity, private debt, and other investments      
Defined Benefit Plan Disclosure [Line Items]      
% Target Allocation 35.00% 35.00%