Changes in Equity and Noncontrolling Interests (Tables)

3 Months Ended

Mar. 31, 2017

Equity

Rollforward of consolidated changes in equity

A rollforward of consolidated changes in equity for the three months ended March 31, 2017 is as follows:

	Amphenol Corporation Shareholders
								Accumulated
	Common Stock							Other
	Shares			Additional		Retained		Comprehensive		Treasury		Noncontrolling		Total
	(in millions)	Amount		Paid-In Capital		Earnings		Loss		Stock		Interests		Equity
Balance as of December 31, 2016	308.3	$	0.3	$	1,020.9	$	3,122.7	$	(469.0)	$	—	$	48.2	$	3,723.1
Net income							224.9						2.4		227.3
Other comprehensive income (loss)									66.7				0.5		67.2
Distributions to shareholders of noncontrolling interests													(4.2)		(4.2)
Purchase of treasury stock											(249.2)				(249.2)
Retirement of treasury stock	(3.7)						(249.2)				249.2				—
Stock options exercised	0.8				23.7										23.7
Dividends declared							(48.9)								(48.9)
Stock-based compensation expense					12.1										12.1
Balance as of March 31, 2017	305.4	$	0.3	$	1,056.7	$	3,049.5	$	(402.3)	$	—	$	46.9	$	3,751.1

A rollforward of consolidated changes in equity for the three months ended March 31, 2016 is as follows:

	Amphenol Corporation Shareholders
								Accumulated
	Common Stock							Other
	Shares			Additional		Retained		Comprehensive		Treasury		Noncontrolling		Total
	(in millions)	Amount		Paid-In Capital		Earnings		Loss		Stock		Interests		Equity
Balance as of December 31, 2015	308.0	$	0.3	$	783.3	$	2,804.4	$	(349.5)	$	—	$	39.9	$	3,278.4
Net income							156.6						1.8		158.4
Other comprehensive income (loss)									52.1				0.3		52.4
Distributions to shareholders of noncontrolling interests													(4.0)		(4.0)
Purchase of treasury stock											(49.2)				(49.2)
Retirement of treasury stock	(1.0)						(49.2)				49.2				—
Stock options exercised, including tax benefit	0.7				19.6										19.6
Dividends declared							(43.0)								(43.0)
Stock-based compensation expense					11.6										11.6
Balance as of March 31, 2016	307.7	$	0.3	$	814.5	$	2,868.8	$	(297.4)	$	—	$	38.0	$	3,424.2