Earnings Per Share, Reconciliation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share
Net Income (Loss)	$ 548.7	$ 439.2
Weighted average common shares outstanding - Basic (in shares)	600.0	595.1
Effect of dilutive stock options (in shares)	27.9	24.8
Weighted average common shares outstanding - Diluted (in shares)	627.9	619.9
Net income attributable to Amphenol Corporation per common share - Basic:
Net income attributable to Amphenol Corporation per common share - Basic (in dollars per share)	$ 0.91	$ 0.74
Net income attributable to Amphenol Corporation per common share - Diluted:
Net income attributable to Amphenol Corporation per common share - Diluted (in dollars per share)	$ 0.87	$ 0.71
Anti-dilutive common shares
Anti-dilutive stock options, excluded from the computations of earnings per share (in shares)	0.1	7.1