Pensions and Other Benefit Programs (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Defined Benefit Plan Disclosure [Line Items]
Service cost			$ 1,667	$ 1,862
Interest cost			6,771	6,912
Amortization of prior service (credit) cost			(1,252)	(1,255)
Amortization of net loss			3,833	3,397
Curtailment			(1,236)	0
Special termination benefits			113	0
Net periodic benefit cost			12,368	10,916
Defined Benefit Plans [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	4,702	5,825	9,725	11,542
Interest cost	21,931	22,253	43,870	45,049
Expected return on plan assets	(31,711)	(30,513)	(61,529)	(61,548)
Amortization of transition credit	0	0	0	0
Amortization of prior service (credit) cost	37	(657)	73	(1,289)
Amortization of net loss	9,347	8,046	18,761	16,118
Settlement	0	559	0	3,440
Curtailment	(394)	0	(2,096)	0
Special termination benefits	368	0	760	0
Net periodic benefit cost	5,068	5,513	13,756	13,312
Defined Benefit Plans [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1,929	1,719	3,814	3,494
Interest cost	7,198	6,699	14,255	13,628
Expected return on plan assets	(8,088)	(7,032)	(16,033)	(14,270)
Amortization of transition credit	(2)	(2)	(4)	(4)
Amortization of prior service (credit) cost	44	70	88	139
Amortization of net loss	2,787	2,458	5,525	5,001
Settlement	0	0	0	0
Curtailment	(224)	0	(224)	0
Special termination benefits	10	0	10	0
Net periodic benefit cost	4,102	3,912	7,879	7,988
Non Pension Postretirement Defined Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	796	932
Interest cost	3,300	3,514
Amortization of prior service (credit) cost	(687)	(627)
Amortization of net loss	1,839	1,734
Curtailment	(386)	0
Special termination benefits	46	0
Net periodic benefit cost	$ 5,680	$ 5,553