Earnings Per Share, Reconciliation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share
Net Income (Loss)	$ 604.4	$ 513.9	$ 1,677.8	$ 1,413.6
Weighted average common shares outstanding - Basic (in shares)	1,204.9	1,195.4	1,202.4	1,191.8
Effect of dilutive stock options (in shares)	60.6	48.7	59.7	48.3
Weighted average common shares outstanding - Diluted (in shares)	1,265.5	1,244.1	1,262.1	1,240.1
Net income attributable to Amphenol Corporation per common share - Basic:
Net income attributable to Amphenol Corporation per common share - Basic (in dollars per share)	$ 0.50	$ 0.43	$ 1.40	$ 1.19
Net income attributable to Amphenol Corporation per common share - Diluted:
Net income attributable to Amphenol Corporation per common share - Diluted (in dollars per share)	$ 0.48	$ 0.41	$ 1.33	$ 1.14
Anti-dilutive common shares
Anti-dilutive stock options, excluded from the computations of earnings per share (in shares)	7.7	16.1	3.9	16.2