Acquisitions, Pro Forma Financial Information (Details) - FCI Asia Pte Ltd (“FCI”) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015
Pro forma adjustments
Net sales	$ 6,296.1	$ 6,137.3
Net income attributable to Amphenol Corporation	$ 856.2	$ 799.3
Net income per common share - Diluted	$ 2.72	$ 2.53
Acquisition-related expenses included in reported results, but excluded from proforma amounts
Pro forma adjustments
Net income attributable to Amphenol Corporation	$ 33.1	$ 5.7
Amortization expense related to acquired intangible assets not reflected in historical results, but included in pro forma amounts
Pro forma adjustments
Net income attributable to Amphenol Corporation		(8.8)
Interest income of funds used to fund the acquisition included in historical results, but excluded from pro forma amounts
Pro forma adjustments
Net income attributable to Amphenol Corporation		(11.6)
Other income included in historical results, but excluded from pro forma amounts
Pro forma adjustments
Net income attributable to Amphenol Corporation		$ (4.8)

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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