Pensions and Other Benefit Programs (Components of Net Periodic Benefit Cost (Income)) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Defined Benefit Pension Plans | United States
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 21	$ 37
Interest cost	15,878	15,616
Expected return on plan assets	(23,179)	(25,424)
Amortization of transition credit	0	0
Amortization of prior service (credit) cost	(15)	(15)
Amortization of net actuarial loss	7,036	8,076
Net periodic benefit (income) cost	(259)	(1,710)
Contributions to benefit plans	1,628	1,409
Defined Benefit Pension Plans | Foreign
Defined Benefit Plan Disclosure [Line Items]
Service cost	384	589
Interest cost	4,488	4,696
Expected return on plan assets	(8,764)	(9,185)
Amortization of transition credit	(2)	(2)
Amortization of prior service (credit) cost	63	(18)
Amortization of net actuarial loss	1,612	1,912
Net periodic benefit (income) cost	(2,219)	(2,008)
Contributions to benefit plans	8,210	9,210
Nonpension Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	255	407
Interest cost	1,654	1,603
Expected return on plan assets	0	0
Amortization of transition credit	0	0
Amortization of prior service (credit) cost	80	88
Amortization of net actuarial loss	511	934
Net periodic benefit (income) cost	2,500	3,032
Contributions to benefit plans	$ 4,756	$ 4,795