Employee Benefit Plans (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Health care cost trend rate assumed	8.00%
Ultimate trend rate	4.00%
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations (percent)	15.00%
Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations (percent)	85.00%
Defined benefit pension plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation of pension plans	$ 122,400,000	$ 170,000,000.0
Weighted-average interest credit rate (as percent)	4.25%	4.25%
Discount rate increased plan obligations	$ (31,900,000)
Pension contributions planned for next fiscal year	7.6
Other postretirement benefits payments	18,700,000	$ 16,800,000	$ 17,100,000
Other postretirement benefits plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate increased plan obligations	(15,300,000)
Health care cost trend assumption	(1,900,000)
Claims cost assumption	$ (4,800,000)