Pensions and Other Benefit Programs (Components of Net Periodic Benefit Cost (Income)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Restructuring Charges
Defined Benefit Plan Disclosure [Line Items]
Settlement / Curtailment			$ (1,400)
Discontinued Operations
Defined Benefit Plan Disclosure [Line Items]
Settlement / Curtailment			(1,000)
Defined Benefit Pension Plans | United States
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 20	$ 23	62	$ 69
Interest cost	15,792	15,363	47,378	46,087
Expected return on plan assets	(23,182)	(25,281)	(69,545)	(75,815)
Amortization of transition credit	0	0	0	0
Amortization of prior service (credit) cost	(15)	(15)	(45)	(45)
Amortization of net actuarial loss	6,537	7,851	19,610	23,555
Settlement / Curtailment	1,477	796	2,278	796
Net periodic benefit (income) cost	629	(1,263)	(262)	(5,353)
Contributions to benefit plans	3,350	2,479	7,401	5,674
Defined Benefit Pension Plans | Foreign
Defined Benefit Plan Disclosure [Line Items]
Service cost	385	567	1,157	1,731
Interest cost	4,435	4,434	13,231	13,721
Expected return on plan assets	(8,340)	(8,730)	(25,609)	(27,045)
Amortization of transition credit	(2)	(2)	(5)	(5)
Amortization of prior service (credit) cost	58	(18)	181	(54)
Amortization of net actuarial loss	1,543	1,807	4,727	5,590
Settlement / Curtailment	0	0	397	0
Net periodic benefit (income) cost	(1,921)	(1,942)	(5,921)	(6,062)
Contributions to benefit plans	652	661	9,740	10,640
Nonpension Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	242	298	725	1,109
Interest cost	1,646	1,676	4,937	4,888
Expected return on plan assets	0	0	0	0
Amortization of transition credit	0	0	0	0
Amortization of prior service (credit) cost	80	112	241	287
Amortization of net actuarial loss	507	338	1,521	2,153
Settlement / Curtailment	0	339	0	339
Net periodic benefit (income) cost	2,475	2,763	7,424	8,776
Contributions to benefit plans	$ 4,628	$ 4,442	$ 13,841	$ 13,552