Employee Benefit Plans (Target and Actual Asset Allocation for Pension Plan by Asset Category) (Details) - Employee Pension Plans	Dec. 31, 2021	Dec. 31, 2020
Pension Plan Assets
Target asset allocation (as a percent)	100.00%
Actual asset allocation (as a percent)	100.00%	100.00%
Cash
Pension Plan Assets
Target asset allocation (as a percent)	5.00%
Actual asset allocation (as a percent)	4.00%	5.00%
Domestic Equity Funds
Pension Plan Assets
Target asset allocation (as a percent)	47.00%
Actual asset allocation (as a percent)	47.00%	34.00%
International Equity Funds
Pension Plan Assets
Target asset allocation (as a percent)	15.00%
Actual asset allocation (as a percent)	16.00%	17.00%
Fixed income funds
Pension Plan Assets
Target asset allocation (as a percent)	33.00%
Actual asset allocation (as a percent)	33.00%	44.00%