Earnings Per Share, Reconciliation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Earnings Per Share
Net Income (Loss)	$ 1,091.3	$ 524.8	$ 1,829.1	$ 1,073.5
Weighted average common shares outstanding - Basic (in shares)	1,215.3	1,202.3	1,212.5	1,201.2
Effect of dilutive stock options (in shares)	56.9	62.6	56.7	59.2
Weighted average common shares outstanding - Diluted (in shares)	1,272.2	1,264.9	1,269.2	1,260.4
Net income attributable to Amphenol Corporation per common share - Basic:
Net income attributable to Amphenol Corporation per common share - Basic (in dollars per share)	$ 0.9	$ 0.44	$ 1.51	$ 0.89
Net income attributable to Amphenol Corporation per common share - Diluted:
Net income attributable to Amphenol Corporation per common share - Diluted (in dollars per share)	$ 0.86	$ 0.41	$ 1.44	$ 0.85
Anti-dilutive common shares
Anti-dilutive stock options, excluded from the computations of earnings per share (in shares)	8.3	3.9	8.2	2.3