Retirement, Other Postretirement Benefits, And Defined Contribution Plans Plan Assets, Asset Allocations Targets (Details)	Dec. 31, 2021	Dec. 31, 2020
Qualified Pension Plans [Member] | Domestic Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	39.00%
Postretirement Asset Allocation	40.00%	38.00%
Qualified Pension Plans [Member] | Domestic Equity Securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	32.00%
Qualified Pension Plans [Member] | Domestic Equity Securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	46.00%
Qualified Pension Plans [Member] | International Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	19.00%
Postretirement Asset Allocation	20.00%	19.00%
Qualified Pension Plans [Member] | International Equity Securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	15.00%
Qualified Pension Plans [Member] | International Equity Securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	23.00%
Qualified Pension Plans [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	42.00%
Postretirement Asset Allocation	40.00%	42.00%
Qualified Pension Plans [Member] | Fixed Income Securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	39.00%
Qualified Pension Plans [Member] | Fixed Income Securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	45.00%
Qualified Pension Plans [Member] | Other Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	0.00%
Postretirement Asset Allocation	0.00%	1.00%
Qualified Pension Plans [Member] | Other Securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	0.00%
Qualified Pension Plans [Member] | Other Securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	10.00%
Other Postretirement Benefits Plan [Member] | Domestic Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	25.00%
Postretirement Asset Allocation	28.00%	29.00%
Other Postretirement Benefits Plan [Member] | Domestic Equity Securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	20.00%
Other Postretirement Benefits Plan [Member] | Domestic Equity Securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	30.00%
Other Postretirement Benefits Plan [Member] | International Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	17.00%
Postretirement Asset Allocation	17.00%	18.00%
Other Postretirement Benefits Plan [Member] | International Equity Securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	12.00%
Other Postretirement Benefits Plan [Member] | International Equity Securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	22.00%
Other Postretirement Benefits Plan [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	58.00%
Postretirement Asset Allocation	55.00%	53.00%
Other Postretirement Benefits Plan [Member] | Fixed Income Securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	53.00%
Other Postretirement Benefits Plan [Member] | Fixed Income Securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	63.00%
Other Postretirement Benefits Plan [Member] | Other Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	0.00%
Postretirement Asset Allocation	0.00%	0.00%
Other Postretirement Benefits Plan [Member] | Other Securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	0.00%
Other Postretirement Benefits Plan [Member] | Other Securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	5.00%