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Pension and Postretirement Health and Life Benefits (Plan Asset Allocations) (Details)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		100.00%	100.00%
Equity Securities [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		52.00%	48.00%
Equity Securities [Member] | Scenario, Forecast [Member] | Minimum [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	55.00%
Equity Securities [Member] | Scenario, Forecast [Member] | Maximum [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	60.00%
Debt Securities [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		42.00%	49.00%
Debt Securities [Member] | Scenario, Forecast [Member] | Minimum [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	35.00%
Debt Securities [Member] | Scenario, Forecast [Member] | Maximum [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	60.00%
Cash [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		6.00%	3.00%
Cash [Member] | Scenario, Forecast [Member] | Minimum [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	0.00%
Cash [Member] | Scenario, Forecast [Member] | Maximum [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	5.00%

X

- Definition

Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

+ Details

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