Earnings Per Share, Reconciliation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings Per Share
Net income from continuing operations attributable to Amphenol Corporation	$ 1,928.0	$ 1,902.3	$ 1,569.4
Income from discontinued operations attributable to Amphenol Corporation, net of income taxes of ($3.2) for 2021	0.0	0.0	21.4
Income taxes on income from discontinued operations attributable to Amphenol Corporation			3.2
Net income attributable to Amphenol Corporation	$ 1,928.0	$ 1,902.3	$ 1,590.8
Weighted average common shares outstanding - Basic (in shares)	596.5	596.2	597.9
Effect of dilutive stock options (in shares)	24.1	24.8	27.6
Weighted average common shares outstanding - Diluted (in shares)	620.6	621.0	625.5
Net income per common share attributable to Amphenol Corporation - Basic:
Net income per common share attributable to Amphenol Corporation - Basic, Continuing operations (in dollars per share)	$ 3.23	$ 3.19	$ 2.62
Net income per common share attributable to Amphenol Corporation - Basic, Discontinued operations, net of income taxes (in dollars per share)	0	0	0.04
Net income per common share attributable to Amphenol Corporation - Basic (in dollars per share)	3.23	3.19	2.66
Net income per common share attributable to Amphenol Corporation - Diluted:
Net income per common share attributable to Amphenol Corporation - Diluted, Continuing operations (in dollars per share)	3.11	3.06	2.51
Net income per common share attributable to Amphenol Corporation - Diluted, Discontinued operations, net of income taxes (in dollars per share)	0	0	0.03
Net income per common share attributable to Amphenol Corporation - Diluted (in dollars per share)	$ 3.11	$ 3.06	$ 2.54
Anti-dilutive common shares
Anti-dilutive stock options, excluded from the computations of earnings per share (in shares)	7.2	9.0	3.5