Earnings Per Share, Reconciliation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share
Net income attributable to Amphenol Corporation	$ 425.7	$ 329.6
Weighted average common shares outstanding - Basic (in shares)	598.3	598.5
Effect of dilutive stock options (in shares)	27.3	25.6
Weighted average common shares outstanding - Diluted (in shares)	625.6	624.1
Net income (loss) attributable to Amphenol Corporation per common share - Basic:
Net income attributable to Amphenol Corporation per common share - Basic	$ 0.71	$ 0.55
Net income (loss) attributable to Amphenol Corporation per common share - Diluted:
Net income attributable to Amphenol Corporation per common share - Diluted	$ 0.68	$ 0.53
Anti-dilutive common shares
Anti-dilutive stock options, excluded from the computations of earnings per share (in shares)	4.1	0.1