Earnings Per Share, Reconciliation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share
Net income attributable to Amphenol Corporation stockholders	$ 439.2	$ 425.7
Weighted average common shares outstanding - Basic (in shares)	595.1	598.3
Effect of dilutive stock options (in shares)	24.8	27.3
Weighted average common shares outstanding - Diluted (in shares)	619.9	625.6
Net income attributable to Amphenol Corporation per common share - Basic:
Net income attributable to Amphenol Corporation per common share - Basic (in dollars per share)	$ 0.74	$ 0.71
Net income attributable to Amphenol Corporation per common share - Diluted:
Net income attributable to Amphenol Corporation per common share - Diluted (in dollars per share)	$ 0.71	$ 0.68
Anti-dilutive common shares
Anti-dilutive stock options, excluded from the computations of earnings per share (in shares)	7.1	4.1