Benefit Plans Schedule Of Percentage Of Allocation Of Plan Assets Table (Details)	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Total, percentage	100.00%
Cash and cash equivalents, percentage	1.50%	1.20%
Equity securities, percentage	39.30%	37.00%
Debt securities, percentage	48.70%	50.20%
Other investments, percentage	10.50%	11.60%
Total, percentage	100.00%	100.00%
Maximum | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Total, percentage	10.00%
Maximum | Equity securities: Equity commingled funds
Defined Benefit Plan Disclosure [Line Items]
Total, percentage	60.00%
Maximum | Debt securities: Government bonds
Defined Benefit Plan Disclosure [Line Items]
Total, percentage	100.00%
Maximum | Other investments
Defined Benefit Plan Disclosure [Line Items]
Total, percentage	100.00%
Minimum | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Total, percentage	0.00%
Minimum | Equity securities: Equity commingled funds
Defined Benefit Plan Disclosure [Line Items]
Total, percentage	0.00%
Minimum | Debt securities: Government bonds
Defined Benefit Plan Disclosure [Line Items]
Total, percentage	15.00%
Minimum | Other investments
Defined Benefit Plan Disclosure [Line Items]
Total, percentage	0.00%