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Pension and Other Postretirement Benefits - Schedule of Pension and Postretirement Plans Investment Policy and Weighted Average Asset Allocations (Details)
Dec. 31, 2021
Equities | Minimum  
Defined Benefit Plan Disclosure [Line Items]  
Policy range 20.00%
Equities | Maximum  
Defined Benefit Plan Disclosure [Line Items]  
Policy range 55.00%
Fixed income | Minimum  
Defined Benefit Plan Disclosure [Line Items]  
Policy range 25.00%
Fixed income | Maximum  
Defined Benefit Plan Disclosure [Line Items]  
Policy range 55.00%
Other investments | Minimum  
Defined Benefit Plan Disclosure [Line Items]  
Policy range 15.00%
Other investments | Maximum  
Defined Benefit Plan Disclosure [Line Items]  
Policy range 35.00%