Earnings Per Share, Reconciliation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Earnings Per Share
Net Income (Loss)	$ 1,245.7	$ 604.4	$ 3,074.8	$ 1,677.8
Weighted average common shares outstanding - Basic (in shares)	1,221.8	1,204.9	1,215.7	1,202.4
Effect of dilutive stock options (in shares)	61.0	60.6	58.1	59.7
Weighted average common shares outstanding - Diluted (in shares)	1,282.8	1,265.5	1,273.8	1,262.1
Net income attributable to Amphenol Corporation per common share - Basic:
Net income attributable to Amphenol Corporation per common share - Basic (in dollars per share)	$ 1.02	$ 0.5	$ 2.53	$ 1.4
Net income attributable to Amphenol Corporation per common share - Diluted:
Net income attributable to Amphenol Corporation per common share - Diluted (in dollars per share)	$ 0.97	$ 0.48	$ 2.41	$ 1.33
Anti-dilutive common shares
Anti-dilutive stock options, excluded from the computations of earnings per share (in shares)	5.3	7.7	7.3	3.9