XML 106 R90.htm IDEA: XBRL DOCUMENT v3.20.4
Retirement Benefits - Weighted Average Actuarial Assumptions Used to Determine Benefit Obligations for the Plans (Details)
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Pension Benefit Plans | UNITED STATES      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 2.63% 3.32% 4.47%
Pension Benefit Plans | Non U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 1.24% 1.82% 2.67%
Future compensation increase rate 0.43% 0.52%  
Postretirement Health Care Benefits Plan      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 2.39% 3.15%