Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Long-Term Targeted Asset Allocation Ranges) (Details) - Pension Plans [Member]	Dec. 31, 2021
Global Equities [Member] | Minimum [Member]
Long-term targeted asset allocation	5.00%
Global Equities [Member] | Maximum [Member]
Long-term targeted asset allocation	35.00%
Fixed Income Securities [Member] | Minimum [Member]
Long-term targeted asset allocation	50.00%
Fixed Income Securities [Member] | Maximum [Member]
Long-term targeted asset allocation	100.00%
Alternative Securities [Member] | Minimum [Member]
Long-term targeted asset allocation	0.00%
Alternative Securities [Member] | Maximum [Member]
Long-term targeted asset allocation	15.00%
Cash and Cash Equivalents [Member] | Minimum [Member]
Long-term targeted asset allocation	0.00%
Cash and Cash Equivalents [Member] | Maximum [Member]
Long-term targeted asset allocation	5.00%