v3.25.4
RETIREMENT BENEFITS - Assumptions Used (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jan. 01, 2025
Jan. 01, 2023
Dec. 31, 2024
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2023
Dec. 31, 2022
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Plan Assumptions - During the year                              
Expected return on assets (as a percent)                         3.00% 3.00%  
VEBA Trust                              
Plan Assumptions - During the year                              
Expected return on assets (as a percent)                         3.00%    
U.S.                              
Plan Assumptions - At year end                              
Interest crediting rate (as percent)     4.55%                   4.26% 4.55%  
Plan Assumptions - During the year                              
Weighted average interest crediting rate     3.90% 4.50% 4.30% 4.10% 5.05% 4.40% 4.15% 4.50%     4.55%    
U.S. | Postretirement Benefit Plans                              
Plan Assumptions - At year end                              
Discount rate (as a percent)     5.55%                   5.18% 5.55%  
Expected return on assets (as a percent)     6.00%                   6.00% 6.00%  
Plan Assumptions - During the year                              
Discount rate (as a percent)     4.90% 5.60% 5.40% 5.20% 6.10% 5.50% 5.25% 5.60%     5.55%    
Expected return on assets (as a percent) 6.00% 5.70%     3.00% 5.70%         5.70% 3.00% 6.00%    
U.S. | VEBA Trust                              
Plan Assumptions - At year end                              
Expected return on assets (as a percent)     3.00%                   3.00% 3.00%  
Plan Assumptions - During the year                              
Expected return on assets (as a percent)                         3.00% 3.00% 3.00%
Non-U.S.                              
Plan Assumptions - At year end                              
Interest crediting rate (as percent)     1.77%                   1.80% 1.77%  
Plan Assumptions - During the year                              
Weighted average interest crediting rate                         1.77% 1.78% 1.73%
Non-U.S. | Pension Plans | Weighted Average                              
Plan Assumptions - At year end                              
Discount rate (as a percent)     7.31%                   7.24% 7.31%  
Future compensation increase rate (as a percent)     3.80%                   3.96% 3.80%  
Expected return on assets (as a percent)     6.27%                   6.70% 6.27%  
Plan Assumptions - During the year                              
Discount rate (as a percent)                         7.31% 6.91% 6.66%
Future compensation increase rate (as a percent)                         3.80% 3.84% 3.76%
Expected return on assets (as a percent)                         6.27% 6.62% 6.05%
Non-U.S. | Pension Plans | Minimum                              
Plan Assumptions - At year end                              
Discount rate, plans with relatively short duration (as a percent)     0.85%                   1.15% 0.85%  
Future compensation increase rate (as a percent)     1.60%                   1.50% 1.60%  
Expected return on assets (as a percent)     2.00%                   1.00% 2.00%  
Plan Assumptions - During the year                              
Discount rate, plans with relatively short duration (as a percent)                         0.85% 1.35% 1.75%
Future compensation increase rate (as a percent)                         1.60% 1.30% 1.30%
Expected return on assets (as a percent)                         2.00% 2.00% 1.00%
Non-U.S. | Pension Plans | Maximum                              
Plan Assumptions - At year end                              
Discount rate, plans with relatively short duration (as a percent)     12.50%                   12.75% 12.50%  
Future compensation increase rate (as a percent)     12.40%                   12.40% 12.40%  
Expected return on assets (as a percent)     11.50%                   11.50% 11.50%  
Plan Assumptions - During the year                              
Discount rate, plans with relatively short duration (as a percent)                         12.50% 14.55% 25.20%
Future compensation increase rate (as a percent)                         12.40% 12.40% 23.11%
Expected return on assets (as a percent)                         11.50% 11.50% 11.50%
Non-U.S. | Postretirement Benefit Plans | Weighted Average                              
Plan Assumptions - At year end                              
Discount rate (as a percent)     11.21%                   10.37% 11.21%  
Expected return on assets (as a percent)     9.39%                   9.60% 9.39%  
Plan Assumptions - During the year                              
Discount rate (as a percent)                         11.21% 9.90% 9.80%
Expected return on assets (as a percent)                         9.39% 9.39% 8.70%
Non-U.S. | Postretirement Benefit Plans | Minimum                              
Plan Assumptions - At year end                              
Discount rate (as a percent)     3.25%                   4.00% 3.25%  
Expected return on assets (as a percent)     8.60%                   9.60% 8.60%  
Plan Assumptions - During the year                              
Discount rate (as a percent)                         3.25% 3.80% 3.25%
Expected return on assets (as a percent)                         8.60% 8.60% 8.70%
Non-U.S. | Postretirement Benefit Plans | Maximum                              
Plan Assumptions - At year end                              
Discount rate (as a percent)     12.20%                   11.00% 12.20%  
Expected return on assets (as a percent)     9.40%                   10.00% 9.40%  
Plan Assumptions - During the year                              
Discount rate (as a percent)                         12.20% 11.40% 11.55%
Expected return on assets (as a percent)                         9.40% 9.40% 9.10%
Qualified | U.S. | Pension Plans                              
Plan Assumptions - At year end                              
Discount rate (as a percent)     5.55%                   5.26% 5.55%  
Expected return on assets (as a percent)     6.00%                   6.00% 6.00%  
Plan Assumptions - During the year                              
Discount rate (as a percent)     4.90% 5.50% 5.30% 5.10% 6.05% 5.40% 5.15% 5.50%     5.55%    
Expected return on assets (as a percent) 6.00% 5.70%               5.70%     6.00% 5.70%  
Nonqualified | U.S. | Pension Plans                              
Plan Assumptions - At year end                              
Discount rate (as a percent)     5.60%                   5.30% 5.60%  
Plan Assumptions - During the year                              
Discount rate (as a percent)     4.95% 5.60% 5.40% 5.15% 6.10% 5.45% 5.20% 5.55%     5.60%