CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 287.8	$ 253.6	$ 556.1	$ 480.9
Total other comprehensive (loss) income, net of tax
Foreign currency translation adjustments	(158.3)	57.4	(99.6)	120.3
Unrealized gain on cash flow hedges	1.9	0.5	1.0	0.6
Defined benefit plan adjustment, net of tax of ($1.6) and ($3.2) for 2018 and ($2.2) and ($4.4) for 2017, respectively	4.9	4.2	9.9	8.3
Total other comprehensive (loss) income, net of tax	(151.5)	62.1	(88.7)	129.2
Total comprehensive income	136.3	315.7	467.4	610.1
Less: Comprehensive income attributable to noncontrolling interests	(0.5)	(2.8)	(4.7)	(5.7)
Comprehensive income attributable to Amphenol Corporation	$ 135.8	$ 312.9	$ 462.7	$ 604.4