Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ 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
Earnings Per Share
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
Basic weighted average common shares outstanding									308.3	309.1	313.1
Effect of dilutive stock options (in shares)									6.9	7.4	7.3
Diluted weighted average common shares outstanding									315.2	316.5	320.4
Earnings per share attributable to Amphenol Corporation shareholders:
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
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
Anti-dilutive stock options, excluded from the computations of earning per share									8.5	6.3	5.5