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Pension and Other Retiree Benefits - Weighted Average Assumptions Used In Calculating Net Periodic Benefit Cost (Details)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Pension | U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate - benefit obligation 5.70% 5.00% 5.10%
Discount rate - interest cost 5.40% 4.90% 5.10%
Expected long-term rate of return 8.00% 8.00% 7.50%
Pension | International      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate - benefit obligation 4.80% 4.20% 4.50%
Discount rate - service cost 4.10% 4.20% 4.10%
Discount rate - interest cost 4.70% 4.20% 4.60%
Expected long-term rate of return 6.30% 6.20% 6.90%
Rate of compensation increase 3.00% 2.90% 3.00%
Post-retirement      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate - benefit obligation 5.20% 4.80% 5.00%
Discount rate - service cost 5.40% 5.00% 5.10%
Discount rate - interest cost 5.10% 4.80% 5.00%