Selected Quarterly Financial Data (Unaudited) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net sales	$ 1,426.5	$ 1,358.7	$ 1,314.2	$ 1,246.1	$ 1,245.7	$ 1,153.1	$ 1,136.1	$ 1,079.8	$ 5,345.5	$ 4,614.7	$ 4,292.1
Gross Profit	456.7	431.7	416.8	388.9	389.3	363.8	359.8	337.9	1,693.8	1,450.8	1,343.2
Operating income	278.9	267.8	255.8	232.1	241.4	224.5	224.0	207.0	1,034.6	896.8	828.3
Net income attributable to Amphenol Corporation	193.5	182.2	174.9	158.5	167.9	160.8	154.0	153.0	709.1	635.7	555.3
Net income per common share-Basic (in dollars per share)	$ 0.62	$ 0.58	$ 0.56	$ 0.50	$ 0.53	$ 0.51	$ 0.48	$ 0.48	$ 2.26	$ 2.00	$ 1.72
Net income per common share-Diluted (in dollars per share)	$ 0.61	$ 0.57	$ 0.54	$ 0.49	$ 0.52	$ 0.50	$ 0.47	$ 0.47	$ 2.21	$ 1.96	$ 1.69
Tax cost primarily related to delay of research and development credits and certain domestic taxes on foreign income that are part of tax provisions within American Taxpayer Relief Act								11.3		(11.3)	11.3
Net income per diluted common share resulting from the delay in the reinstatement of certain federal income tax provisions for the year 2012 (in dollars per share)								$ 0.03		$ 0.03	$ 0.03
Net income per diluted common share excluding the effects of charges related to acquisition-related expenses (in dollars per share)	$ 0.63	$ 0.58		$ 0.50	$ 0.53	$ 0.49		$ 0.44
Acquisition-related expenses	1.8	2.5		2.0	3.4	2.5			14.1	6.0	2.0
Acquisition-related expenses, net of tax	1.5	2.5		1.3	2.4	2.1
Acquisition-related expenses, net of tax (in dollars per share)	$ 0.02	$ 0.01		$ 0.01	$ 0.01	$ 0.01
One-time tax benefit related to reserve adjustments from the favorable settlement of international tax positions and the completion of prior year audits						3.6
One-time tax benefit related to reserve adjustments from the favorable settlement of international tax positions and the completion of prior year audits (in dollars per share)						$ 0.02
Backlog
Acquisition-related expenses	7.8
Acquisition-related expenses, net of tax	$ 4.9