Earnings Per Share, Reconciliation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share
Net Income (Loss)	$ 513.9	$ 496.6	$ 1,413.6	$ 1,394.8
Weighted average common shares outstanding - Basic (in shares)	597.7	595.3	595.9	596.6
Effect of dilutive stock options (in shares)	24.3	24.0	24.2	24.9
Weighted average common shares outstanding - Diluted (in shares)	622.0	619.3	620.1	621.5
Net income attributable to Amphenol Corporation per common share - Basic:
Net income attributable to Amphenol Corporation per common share - Basic (in dollars per share)	$ 0.86	$ 0.83	$ 2.37	$ 2.34
Net income attributable to Amphenol Corporation per common share - Diluted:
Net income attributable to Amphenol Corporation per common share - Diluted (in dollars per share)	$ 0.83	$ 0.80	$ 2.28	$ 2.24
Anti-dilutive common shares
Anti-dilutive stock options, excluded from the computations of earnings per share (in shares)	8.1	12.5	8.1	8.9