Earnings Per Share, Reconciliation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share
Net income from continuing operations attributable to Amphenol Corporation	$ 496.6	$ 418.8	$ 1,394.8	$ 1,115.5
Income from discontinued operations attributable to Amphenol Corporation, net of income taxes of ($1.5) and ($1.8) for 2021, respectively	0.0	7.7	0.0	10.3
Income taxes on income from discontinued operations attributable to Amphenol Corporation		1.5		1.8
Net income attributable to Amphenol Corporation	$ 496.6	$ 426.5	$ 1,394.8	$ 1,125.8
Weighted average common shares outstanding - Basic (in shares)	595.3	597.7	596.6	597.8
Effect of dilutive stock options (in shares)	24.0	28.1	24.9	26.8
Weighted average common shares outstanding - Diluted (in shares)	619.3	625.8	621.5	624.6
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)	$ 0.83	$ 0.70	$ 2.34	$ 1.87
Net income per common share attributable to Amphenol Corporation - Basic, Discontinued operations, net of income taxes (in dollars per share)	0	0.01	0	0.02
Net income per common share attributable to Amphenol Corporation - Basic (in dollars per share)	0.83	0.71	2.34	1.88
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)	0.80	0.67	2.24	1.79
Net income per common share attributable to Amphenol Corporation - Diluted, Discontinued operations, net of income taxes (in dollars per share)	0	0.01	0	0.02
Net income per common share attributable to Amphenol Corporation - Diluted (in dollars per share)	$ 0.80	$ 0.68	$ 2.24	$ 1.80
Anti-dilutive common shares
Anti-dilutive stock options, excluded from the computations of earnings per share (in shares)	12.5	7.4	8.9	3.8