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Other intangible assets, net (Details) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011 Assets subject to amortization Customer related intangibles	Dec. 31, 2010 Assets subject to amortization Customer related intangibles	Jun. 30, 2011 Assets subject to amortization Unpatented technology	Dec. 31, 2010 Assets subject to amortization Unpatented technology	Jun. 30, 2011 Assets subject to amortization Software	Dec. 31, 2010 Assets subject to amortization Software	Jun. 30, 2011 Assets subject to amortization Patents and other protective rights	Dec. 31, 2010 Assets subject to amortization Patents and other protective rights	Jun. 30, 2011 Assets subject to amortization Trade secrets	Dec. 31, 2010 Assets subject to amortization Trade secrets	Jun. 30, 2011 Assets not subject to amortization Trade names	Dec. 31, 2010 Assets not subject to amortization Trade names
Schedule Of Other Intangible Assets By Major Class [Line Items]
Cost			$ 1,014,863	$ 960,013	$ 195,347	$ 175,819	$ 49,097	$ 49,095	$ 26,272	$ 25,505	$ 1,604	$ 1,604	$ 232,981	$ 229,386
Accumulated amortization			(269,668)	(235,885)	(65,424)	(54,376)	(33,603)	(30,182)	(17,045)	(15,292)	(1,365)	(1,174)	0	0
Net book value			745,195	724,128	129,923	121,443	15,494	18,913	9,227	10,213	239	430	232,981	229,386
Amortization expense of other intangible assets	$ 48,376	$ 37,013

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The accumulated amount of amortization of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph a(1)

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Aggregate amount of amortization expense recognized for intangible asset during the period. A recognized intangible asset shall be amortized over its estimated useful life to the reporting entity unless that life is determined to be indefinite. If an intangible asset has a finite useful life, but the precise length of that life is not known, that intangible asset shall be amortized over the best estimate of its useful life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph a(2)

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Sum of the gross carrying amounts before accumulated amortization as of the balance sheet date of all intangible assets having statutory or estimated useful lives. The aggregate gross carrying amount (including any previously recognized impairment charges) of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph a(1)

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The aggregate sum of gross carrying value of a major finite-lived intangible asset class, less accumulated amortization and any impairment charges. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph a(1)

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