Pensions and Other Benefit Programs (Components of Net Periodic Benefit Cost (Income)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Nonpension Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 98	$ 191	$ 275	$ 549
Interest cost	1,163	884	3,774	2,763
Expected return on plan assets	0	0	0	0
Amortization of prior service (credit) cost	0	0	0	0
Amortization of net actuarial loss (gain)	(977)	(131)	(1,690)	44
Settlement	0	0	0	0
Net periodic benefit (income) cost	284	944	2,359	3,356
Contributions to benefit plans	2,330	2,401	8,947	10,049
United States | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	11	14	31	62
Interest cost	15,440	11,072	47,618	33,354
Expected return on plan assets	(21,280)	(17,586)	(64,506)	(53,311)
Amortization of prior service (credit) cost	(5)	(11)	(15)	(33)
Amortization of net actuarial loss (gain)	4,209	8,317	13,042	24,781
Settlement	366	350	680	350
Net periodic benefit (income) cost	(1,259)	2,156	(3,150)	5,203
Contributions to benefit plans	2,722	2,103	5,756	4,401
Foreign | Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	190	291	578	978
Interest cost	5,379	3,270	15,935	10,354
Expected return on plan assets	(7,575)	(6,423)	(22,434)	(20,437)
Amortization of prior service (credit) cost	72	60	214	192
Amortization of net actuarial loss (gain)	525	1,625	1,552	5,172
Settlement	0	0	0	0
Net periodic benefit (income) cost	(1,409)	(1,177)	(4,155)	(3,741)
Contributions to benefit plans	$ 491	$ 348	$ 16,036	$ 8,961