Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Consolidated Statements of Comprehensive Income
Net income	$ 660.7	$ 832.6	$ 772.3
Total other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	243.3	(110.7)	(152.7)
Unrealized gain (loss) on cash flow hedges	(0.1)	1.6	(0.4)
Defined benefit plan adjustment	27.8	(12.5)	8.2
Total other comprehensive income (loss), net of tax	271.0	(121.6)	(144.9)
Total comprehensive income	931.7	711.0	627.4
Less: Comprehensive income attributable to noncontrolling interests	(13.2)	(7.6)	(7.6)
Comprehensive income attributable to Amphenol Corporation	$ 918.5	$ 703.4	$ 619.8