Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Consolidated Statements of Income
Net sales	$ 8,598.9	$ 8,225.4	$ 8,202.0
Cost of sales	5,934.8	5,609.4	5,547.1
Gross profit	2,664.1	2,616.0	2,654.9
Acquisition-related expenses	11.5	25.4	8.5
Selling, general and administrative expenses	1,014.2	971.4	959.5
Operating income	1,638.4	1,619.2	1,686.9
Interest expense	(115.4)	(117.6)	(101.7)
Loss on early extinguishment of debt	0.0	(14.3)	0.0
Other income, net	3.6	8.6	3.2
Income before income taxes	1,526.6	1,495.9	1,588.4
Provision for income taxes	(313.3)	(331.9)	(371.5)
Net income	1,213.3	1,164.0	1,216.9
Less: Net income attributable to noncontrolling interests	(9.9)	(9.0)	(11.9)
Net income attributable to Amphenol Corporation	$ 1,203.4	$ 1,155.0	$ 1,205.0
Net income per common share - Basic (in dollars per share)	$ 4.04	$ 3.88	$ 4.00
Weighted average common shares outstanding - Basic (in shares)	298.0	297.5	301.2
Net income per common share - Diluted (in dollars per share)	$ 3.91	$ 3.75	$ 3.85
Weighted average common shares outstanding - Diluted (in shares)	307.5	307.9	312.6
Dividends declared per share (in dollars per share)	$ 1.04	$ 0.96	$ 0.88