Pensions and Other Benefit Programs (Components of Net Periodic Benefit Cost (Income)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Restructuring Charges
Defined Benefit Plan Disclosure [Line Items]
Settlement	$ (700)		$ (700)
Discontinued Operations
Defined Benefit Plan Disclosure [Line Items]
Settlement	(300)		(300)
Defined Benefit Pension Plans | United States
Defined Benefit Plan Disclosure [Line Items]
Service cost	21	$ 9	42	$ 46
Interest cost	15,708	15,108	31,586	30,724
Expected return on plan assets	(23,184)	(25,119)	(46,363)	(50,543)
Amortization of transition credit	0	0	0	0
Amortization of prior service (credit) cost	(15)	(15)	(30)	(30)
Amortization of net actuarial loss	6,037	7,628	13,073	15,704
Settlement	801	0	801	0
Net periodic benefit (income) cost	(632)	(2,389)	(891)	(4,099)
Contributions to benefit plans	2,423	1,906	4,051	3,194
Defined Benefit Pension Plans | Foreign
Defined Benefit Plan Disclosure [Line Items]
Service cost	388	575	772	1,164
Interest cost	4,308	4,591	8,796	9,287
Expected return on plan assets	(8,505)	(9,118)	(17,269)	(18,304)
Amortization of transition credit	(1)	(2)	(3)	(3)
Amortization of prior service (credit) cost	60	(18)	123	(37)
Amortization of net actuarial loss	1,572	1,870	3,184	3,783
Settlement	397	0	397	0
Net periodic benefit (income) cost	(1,781)	(2,102)	(4,000)	(4,110)
Contributions to benefit plans	878	769	9,088	9,979
Nonpension Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	228	405	483	811
Interest cost	1,637	1,607	3,291	3,210
Expected return on plan assets	0	0	0	0
Amortization of transition credit	0	0	0	0
Amortization of prior service (credit) cost	81	88	161	176
Amortization of net actuarial loss	503	881	1,014	1,815
Settlement	0	0	0	0
Net periodic benefit (income) cost	2,449	2,981	4,949	6,012
Contributions to benefit plans	$ 4,457	$ 4,316	$ 9,213	$ 9,111