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Retirement Benefits - Summary Of Percentage Point Change In Assumed Health Care Cost Trends (Details) - Other Pension Plans, Defined Benefit - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]      
Aggregate of service and interest components of net periodic cost (benefit), one percentage point increase $ 2 $ 3 $ 4
Aggregate of service and interest components of net periodic cost (benefit), one percentage point decrease (2) (2) $ (4)
Effect on accumulated postretirement benefit obligation, one percentage point increase 78 97  
Effect on accumulated postretirement benefit obligation, one percentage point decrease $ (68) $ (84)