Pension And Other Postretirement Benefits (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Non-cash pension settlement charge	$ 15,900,000	$ 16,700,000	$ 15,900,000	$ 16,700,000
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Required term of service to be eligible for plan match			one year of service and 1,000 hours of service
Employer contributions	22,800,000	10,000,000.0	$ 44,800,000	31,600,000
Non-cash pension settlement charge	15,900,000	$ 16,700,000	15,900,000	$ 16,700,000
Expected employer contributions remainder of year	0		0
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Plan assets	$ 0		$ 0		$ 0