Other intangible assets, net (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Finite-lived Intangible Assets [Roll Forward]
Cost	$ 160,520,000	$ 49,395,000
Accumulated Amortization	(44,256,000)	(35,833,000)
Net Book Value	116,264,000	13,562,000
Indefinite-lived Intangible Assets [Roll Forward]
Amortization of Other Intangibles	113,000,000	98,000,000	84,000,000
Future Amortization Expense, Year One	136,000,000
Future Amortization Expense, Year Two	127,000,000
Future Amortization Expense, Year Three	113,000,000
Future Amortization Expense, Year Four	111,000,000
Future Amortization Expense, Year Five	101,000,000
Customer Relationships [Member]
Finite-lived Intangible Assets [Roll Forward]
Cost	1,509,339,000	1,022,134,000
Accumulated Amortization	(379,535,000)	(302,156,000)
Net Book Value	1,129,804,000	719,978,000
Unpatented Technology [Member]
Finite-lived Intangible Assets [Roll Forward]
Cost	198,609,000	193,915,000
Accumulated Amortization	(97,487,000)	(72,358,000)
Net Book Value	101,122,000	121,557,000
Patents and other protective rights [Member]
Finite-lived Intangible Assets [Roll Forward]
Cost	40,399,000	25,398,000
Accumulated Amortization	(20,312,000)	(17,699,000)
Net Book Value	20,087,000	7,699,000
Trade secrets [Member]
Finite-lived Intangible Assets [Roll Forward]
Cost	1,500,000	1,500,000
Accumulated Amortization	(1,500,000)	(1,361,000)
Net Book Value	0	139,000
Trade Names [Member]
Indefinite-lived Intangible Assets [Roll Forward]
Finite-Lived Intangible Assets, Net, Ending Balance	$ 331,590,000	$ 231,207,000