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Employee Benefits Assumptions (Details)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Other Postretirement Benefit Plans [Member]    
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase 4.13% 4.58%
Defined Benefit Plan, Expected Return (Loss) on Plan Assets 5.04% 5.02%
Pension Plan [Member]    
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 2.92% 2.64%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase 4.26% 3.65%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate 2.64% 3.43%
Defined Benefit Plan, Expected Return (Loss) on Plan Assets 6.88% 7.00%
Other Pension, Postretirement and Supplemental Plans [Member]    
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 2.92% 2.64%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase 4.10% 4.10%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate 2.64% 3.43%
Maximum [Member] | Other Postretirement Benefit Plans [Member]    
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 3.11% 2.92%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate 2.92% 3.47%
Minimum [Member] | Other Postretirement Benefit Plans [Member]    
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 2.75% 2.22%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate 2.22% 3.19%