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Retirement Benefits (Details 13) - Pension Benefits [Member]
 12 Months Ended
Dec. 31, 2021
Minimum | Equity Securities: Other U.S. equities [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocation 18
Minimum | Global Equity Securities [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocation 10
Minimum | Global debt securities and cash [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocation 15
Minimum | Private equity [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocation 0
Minimum | Hedge funds [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocation 10
Minimum | Real estate and other [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocation 0
Maximum | Equity Securities: Other U.S. equities [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocation 40
Maximum | Global Equity Securities [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocation 30
Maximum | Global debt securities and cash [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocation 40
Maximum | Private equity [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocation 15
Maximum | Hedge funds [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocation 20
Maximum | Real estate and other [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocation 10.0