CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 268.3	$ 227.3
Total other comprehensive income, net of tax:
Foreign currency translation adjustments	58.7	62.9
Unrealized gain (loss) on cash flow hedges	(0.9)	0.1
Defined benefit plan adjustment, net of tax of ($1.6) and ($2.2), respectively	5.0	4.2
Total other comprehensive income, net of tax	62.8	67.2
Total comprehensive income	331.1	294.5
Less: Comprehensive income attributable to noncontrolling interests	(4.2)	(2.9)
Comprehensive income attributable to Amphenol Corporation	$ 326.9	$ 291.6