Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Earnings Per Share
Net Income (Loss)	$ 933.0	$ 737.8
Weighted average common shares outstanding - Basic (in shares)	1,228.9	1,209.8
Effect of dilutive stock options (in shares)	60.8	56.4
Weighted average common shares outstanding - Diluted (in shares)	1,289.7	1,266.2
Net income attributable to Amphenol Corporation per common share - Basic
Net income attributable to Amphenol Corporation per common share - Basic (in dollars per share)	$ 0.76	$ 0.61
Net income attributable to Amphenol Corporation per common share - Diluted
Net income attributable to Amphenol Corporation per common share - Diluted (in dollars per share)	$ 0.72	$ 0.58
Anti-dilutive common shares
Anti-dilutive stock options, excluded from the computations of earnings per share (in shares)	0.0	8.2