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% |