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Pension and Other Retiree Benefits - Weighted Average Assumptions Used in Calculating Benefit Obligation (Details)
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Pension | U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 2.90% 2.60% 3.30%
Pension | International      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 1.80% 1.20% 1.80%
Rate of compensation increase 3.00% 2.90% 2.90%
Post-retirement      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 2.40% 1.90% 2.70%