Accumulated Other Comprehensive Income (Loss) (Reclassifications out of AOCI) (Details 3) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Other income, net										$ (19,094)	$ (33,500)	$ (32,554)
Interest expense										63,301	54,403	33,943
Provision for Income Taxes										87,300	51,300	96,300
Net of Tax		$ (55,690)	$ 21,134	$ (124,171)	$ (52,977)	$ (6,643)	$ (33,840)	$ 66,615	$ (96,566)	(211,704)	(70,434)	(353,327)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net of Tax										(36,306)	(50,094)	(1,178)
Foreign Currency Translation Adjustments [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, net of tax										0	0
Pension and Other Postretirement Plans [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, before tax										(41,592)	(67,969)	(2,436)
Provision for income taxes										10,649	17,482	627
Reclassifications, net of tax										(30,943)	(50,487)	(1,809)
Net Actuarial Loss [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, before tax	[1]									(42,146)	(70,833)	(5,486)
Provision for income taxes										10,790	18,219	1,414
Reclassifications, net of tax										(31,356)	(52,614)	(4,072)
Net Prior Service Cost [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, before tax	[1]									1,641	2,864	3,170
Provision for income taxes										(420)	(737)	(817)
Reclassifications, net of tax										1,221	2,127	2,353
Curtailment (Gains) Losses Included in Net Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, before tax	[1]									(1,087)	0	(120)
Provision for income taxes										279		30
Reclassifications, net of tax										(808)		(90)
Cash Flow Hedges
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, net of tax										(5,363)	393
Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest expense										$ (5,363)	$ 393	$ 631

[1] These accumulated other comprehensive income components are included in the computation of net periodic pension and postretirement plan cost (see Note 15) and are included in non-operating pension and postretirement benefit income in the Company’s Consolidated Statements of Operations.