Selected Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net sales	$ 1,651.1	$ 1,635.9	$ 1,548.2	$ 1,451.2	$ 1,430.5	$ 1,459.6	$ 1,351.5	$ 1,327.1	$ 6,286.4	$ 5,568.7	$ 5,345.5
Gross Profit	546.1	537.3	497.3	459.2	458.5	464.0	432.5	424.6	2,040.0	1,779.5	1,693.8
Operating income	339.1	326.3	300.3	239.4	289.0	294.8	260.7	260.2	1,205.2	1,104.7	1,034.6
Net income	238.3	227.1	208.7	158.4	202.6	207.3	180.6	181.8	832.6	772.3	715.2
Net income attributable to Amphenol Corporation shareholders	$ 235.4	$ 224.3	$ 206.5	$ 156.6	$ 200.1	$ 204.5	$ 179.0	$ 179.8	$ 822.9	$ 763.5	$ 709.1
Net income per common share - Basic (in dollars per share)	$ 0.76	$ 0.73	$ 0.67	$ 0.51	$ 0.65	$ 0.66	$ 0.58	$ 0.58	$ 2.67	$ 2.47	$ 2.26
Net income per common share-Diluted (in dollars per share)	$ 0.75	$ 0.71	$ 0.65	$ 0.50	$ 0.63	$ 0.65	$ 0.56	$ 0.57	$ 2.61	$ 2.41	$ 2.21
Acquisition-related expenses									$ 36.6	$ 5.7	$ 14.1
FCI Asia Pte Ltd (“FCI”)
Operating income				$ (30.3)			$ (5.7)
Net income				(27.3)			(5.7)
Net income attributable to Amphenol Corporation shareholders				$ (27.3)			$ (5.7)
Net income per common share-Diluted (in dollars per share)				$ (0.09)			$ (0.02)
Other
Operating income		$ (6.3)
Net income		(5.8)
Net income attributable to Amphenol Corporation shareholders		$ (5.8)
Net income per common share-Diluted (in dollars per share)		$ (0.02)