Pension Benefits, Other Postretirement Benefits and Employee Savings and Investment Plans (Summary of Changes in Fair Value of Guaranteed Deposit Account's Level 3 Assets) (Details) - Pension Benefits $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value of plan assets as of January 1	$ 33,462
Fair value of plan assets as of December 31	26,300
Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value of plan assets as of January 1	1,290
Fair value of plan assets as of December 31	1,123
Guaranteed deposit account
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value of plan assets as of January 1	1,290
Fair value of plan assets as of December 31	1,123
Guaranteed deposit account | Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value of plan assets as of January 1	1,290
Change in unrealized gain (loss)	(129)
Purchases, sales, issuances and settlements (net)	(38)
Fair value of plan assets as of December 31	$ 1,123