Pensions and Other Benefit Programs (Components of Net Periodic Benefit Cost (Income)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Discontinued Operations and Restructuring Charges
Defined Benefit Plan Disclosure [Line Items]
Settlement	$ (2,600)	$ (300)	$ (500)	$ (700)
Defined Benefit Pension Plans | United States
Defined Benefit Plan Disclosure [Line Items]
Service cost	27	21	53	42
Interest cost	13,179	15,708	26,358	31,586
Expected return on plan assets	(21,303)	(23,184)	(42,607)	(46,363)
Amortization of transition credit	0	0	0	0
Amortization of prior service (credit) cost	(15)	(15)	(30)	(30)
Amortization of net actuarial loss	8,197	6,037	16,395	13,073
Settlement	612	801	1,001	801
Net periodic benefit cost (income)	697	(632)	1,170	(891)
Contributions to benefit plans	1,969	2,423	3,898	4,051
Defined Benefit Pension Plans | Foreign
Defined Benefit Plan Disclosure [Line Items]
Service cost	399	388	798	772
Interest cost	3,407	4,308	6,925	8,796
Expected return on plan assets	(7,969)	(8,505)	(16,177)	(17,269)
Amortization of transition credit	(1)	(1)	(2)	(3)
Amortization of prior service (credit) cost	59	60	120	123
Amortization of net actuarial loss	2,005	1,572	4,064	3,184
Settlement	3,190	397	3,190	397
Net periodic benefit cost (income)	1,090	(1,781)	(1,082)	(4,000)
Contributions to benefit plans	580	878	8,568	9,088
Nonpension Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	217	228	434	483
Interest cost	1,242	1,637	2,487	3,291
Expected return on plan assets	0	0	0	0
Amortization of transition credit	0	0	0	0
Amortization of prior service (credit) cost	94	81	187	161
Amortization of net actuarial loss	738	503	1,474	1,014
Settlement	0	0	0	0
Net periodic benefit cost (income)	2,291	2,449	4,582	4,949
Contributions to benefit plans	$ 3,616	$ 4,457	$ 8,071	$ 9,213