Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share
Net income attributable to Amphenol Corporation shareholders	$ 224.9	$ 156.6
Basic weighted average common shares outstanding (in shares)	306.6	307.6
Effect of dilutive stock options (in shares)	9.8	6.6
Diluted weighted average common shares outstanding (in shares)	316.4	314.2
Earnings per share attributable to Amphenol Corporation shareholders:
Basic (in dollars per share)	$ 0.73	$ 0.51
Diluted (in dollars per share)	$ 0.71	$ 0.50
Anti-dilutive common shares
Anti-dilutive stock options, excluded from the computations of earning per share (in shares)	0.0	11.0

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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