Goodwill (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Schedule Of Goodwill By Segment [Line Items]
Ending Balance	$ 2,866,426	$ 2,727,780
Industrial Technology [Member]
Schedule Of Goodwill By Segment [Line Items]
Beginning Balance	420,002	431,073
Currency translation adjustments	(949)	(11,071)
Ending Balance	419,053	420,002
Energy Systems And Controls [Member]
Schedule Of Goodwill By Segment [Line Items]
Beginning Balance	380,595	383,207
Goodwill acquired	13,663
Currency translation adjustments	(291)	(2,554)
Reclassifications and other		(58)
Ending Balance	393,967	380,595
Medical and Scientific Imaging [Member]
Schedule Of Goodwill By Segment [Line Items]
Beginning Balance	637,991	623,786
Goodwill acquired	135,379	8,593
Currency translation adjustments	(5,142)	804
Reclassifications and other		4,808
Ending Balance	768,228	637,991
RF Technology [Member]
Schedule Of Goodwill By Segment [Line Items]
Beginning Balance	1,289,192	950,366
Goodwill acquired		341,243
Currency translation adjustments	1,258	(2,657)
Reclassifications and other	(5,272)	240
Ending Balance	$ 1,285,178	$ 1,289,192