CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
CONDENSED CONSOLIDATED STATEMENTS OF INCOME
Net sales	$ 1,981.4	$ 1,666.5	$ 3,848.3	$ 3,226.6
Cost of sales	1,336.6	1,113.9	2,596.6	2,158.1
Gross profit	644.8	552.6	1,251.7	1,068.5
Acquisition-related expenses		4.0		4.0
Selling, general and administrative expenses	236.6	212.4	466.6	414.2
Operating income	408.2	336.2	785.1	650.3
Interest expense	(26.0)	(23.4)	(50.5)	(42.7)
Other income, net	0.1	4.4	2.4	7.9
Income before income taxes	382.3	317.2	737.0	615.5
Provision for income taxes	(94.5)	(63.6)	(180.9)	(134.6)
Net income	287.8	253.6	556.1	480.9
Less: Net income attributable to noncontrolling interests	(3.0)	(2.1)	(5.7)	(4.5)
Net income attributable to Amphenol Corporation	$ 284.8	$ 251.5	$ 550.4	$ 476.4
Net income per common share — Basic (in dollars per share)	$ 0.95	$ 0.82	$ 1.82	$ 1.56
Weighted average common shares outstanding — Basic (in shares)	300.8	305.8	302.3	306.2
Net income per common share — Diluted (in dollars per share)	$ 0.91	$ 0.80	$ 1.75	$ 1.51
Weighted average common shares outstanding — Diluted (in shares)	312.3	316.1	314.2	316.3
Dividends declared per share (in dollars per share)	$ 0.23	$ 0.16	$ 0.42	$ 0.32