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Goodwill and Other Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Roll Forward]
Beginning balances	$ 8,647,142	$ 5,824,726
Goodwill acquired	82,659	2,876,991
Currency translation adjustments	58,854	(52,047)
Reclassifications and other	31,658	(2,528)
Ending balances	8,820,313	8,647,142
RF Technology
Goodwill [Roll Forward]
Beginning balances	4,687,670	1,993,299
Goodwill acquired	63,490	2,710,223
Currency translation adjustments	19,337	(15,118)
Reclassifications and other	28,394	(734)
Ending balances	4,798,891	4,687,670
Medical & Scientific Imaging
Goodwill [Roll Forward]
Beginning balances	3,185,071	3,039,197
Goodwill acquired	0	166,768
Currency translation adjustments	17,582	(19,100)
Reclassifications and other	3,264	(1,794)
Ending balances	3,205,917	3,185,071
Industrial Technology
Goodwill [Roll Forward]
Beginning balances	363,978	374,033
Goodwill acquired	0	0
Currency translation adjustments	13,540	(10,055)
Reclassifications and other	0	0
Ending balances	377,518	363,978
Energy Systems & Controls
Goodwill [Roll Forward]
Beginning balances	410,423	418,197
Goodwill acquired	19,169	0
Currency translation adjustments	8,395	(7,774)
Reclassifications and other	0	0
Ending balances	$ 437,987	$ 410,423

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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