Earnings Per Share, Reconciliation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share
Net Income (Loss)	$ 2,424.0	$ 1,928.0	$ 1,902.3
Weighted average common shares outstanding - Basic (in shares)	1,203.8	1,193.0	1,192.3
Effect of dilutive stock options (in shares)	59.8	48.2	49.7
Weighted average common shares outstanding - Diluted (in shares)	1,263.6	1,241.2	1,242.0
Net income attributable to Amphenol Corporation per common share - Basic:
Net income attributable to Amphenol Corporation per common share - Basic (in dollars per share)	$ 2.01	$ 1.62	$ 1.6
Net income attributable to Amphenol Corporation per common share - Diluted:
Net income attributable to Amphenol Corporation per common share - Diluted (in dollars per share)	$ 1.92	$ 1.55	$ 1.53
Anti-dilutive common shares
Anti-dilutive stock options, excluded from the computations of earnings per share (in shares)	4.8	14.4	18.0