Condensed Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Condensed Consolidated Statements of Income
Net sales	$ 2,818.5	$ 2,323.4	$ 7,849.5	$ 6,172.9
Cost of sales	1,928.6	1,588.5	5,388.9	4,274.4
Gross profit	889.9	734.9	2,460.6	1,898.5
Acquisition-related expenses	0.0	0.0	55.4	0.0
Selling, general and administrative expenses	318.7	259.1	893.0	748.4
Operating income	571.2	475.8	1,512.2	1,150.1
Interest expense	(29.0)	(28.0)	(86.7)	(87.1)
Other income (expense), net	0.0	1.0	(0.3)	3.4
Income from continuing operations before income taxes	542.2	448.8	1,425.2	1,066.4
Provision for income taxes	(120.5)	(99.3)	(302.8)	(213.3)
Net income from continuing operations	421.7	349.5	1,122.4	853.1
Less: Net income from continuing operations attributable to noncontrolling interests	(2.9)	(2.9)	(6.9)	(6.7)
Net income from continuing operations attributable to Amphenol Corporation	418.8	346.6	1,115.5	846.4
Income from discontinued operations attributable to Amphenol Corporation, net of income taxes of ($1.5) and ($1.8) for 2021, respectively	7.7	0.0	10.3	0.0
Net income attributable to Amphenol Corporation	$ 426.5	$ 346.6	$ 1,125.8	$ 846.4
Net income per common share - Basic, Continuing operations (in dollars per share)	$ 0.70	$ 0.58	$ 1.87	$ 1.42
Net income per common share - Basic, Discontinued operations, net of income taxes (in dollars per share)	0.01	0	0.02	0
Net income per common share - Basic (in dollars per share)	$ 0.71	$ 0.58	$ 1.88	$ 1.42
Weighted average common shares outstanding - Basic (in shares)	597.7	597.5	597.8	595.2
Net income per common share - Diluted, Continuing operations (in dollars per share)	$ 0.67	$ 0.56	$ 1.79	$ 1.38
Net income per common share - Diluted, Discontinued operations, net of income taxes (in dollars per share)	0.01	0	0.02	0
Net income per common share - Diluted (in dollars per share)	$ 0.68	$ 0.56	$ 1.80	$ 1.38
Weighted average common shares outstanding - Diluted (in shares)	625.8	616.4	624.6	612.5