Earnings Per Share, Reconciliation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Earnings Per Share
Net Income (Loss)	$ 524.8	$ 460.5	$ 1,073.5	$ 899.7
Weighted average common shares outstanding - Basic (in shares)	1,202.3	1,189.9	1,201.2	1,190.0
Effect of dilutive stock options (in shares)	62.6	46.6	59.2	48.1
Weighted average common shares outstanding - Diluted (in shares)	1,264.9	1,236.5	1,260.4	1,238.1
Net income attributable to Amphenol Corporation per common share - Basic:
Net income attributable to Amphenol Corporation per common share - Basic (in dollars per share)	$ 0.44	$ 0.39	$ 0.89	$ 0.76
Net income attributable to Amphenol Corporation per common share - Diluted:
Net income attributable to Amphenol Corporation per common share - Diluted (in dollars per share)	$ 0.41	$ 0.37	$ 0.85	$ 0.73
Anti-dilutive common shares
Anti-dilutive stock options, excluded from the computations of earnings per share (in shares)	3.9	20.1	2.3	17.5