Shareholders' Equity and Noncontrolling Interests (Tables)

9 Months Ended

Sep. 30, 2018

Shareholders' Equity and Noncontrolling Interests

Rollforward of consolidated changes in equity

A rollforward of consolidated changes in equity for the nine months ended September 30, 2018 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, 2017	305.7	$	0.3	$	1,249.0	$	2,941.5	$	(201.0)	$	—	$	53.6	$	4,043.4
Cumulative effect of adoption of revenue recognition standard (Note 2)							3.2								3.2
Net income							866.9						8.8		875.7
Other comprehensive loss									(136.3)				(2.7)		(139.0)
Acquisitions resulting in noncontrolling interest													0.3		0.3
Purchase of noncontrolling interest					(2.3)								(5.4)		(7.7)
Distributions to shareholders of noncontrolling interests													(10.2)		(10.2)
Purchase of treasury stock											(680.2)				(680.2)
Retirement of treasury stock	(7.7)						(680.2)				680.2				—
Stock options exercised	3.3				123.0										123.0
Dividends declared							(195.6)								(195.6)
Stock-based compensation expense					40.4										40.4
Balance as of September 30, 2018	301.3	$	0.3	$	1,410.1	$	2,935.8	$	(337.3)	$	—	$	44.4	$	4,053.3

A rollforward of consolidated changes in equity for the nine months ended September 30, 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							753.9						7.2		761.1
Other comprehensive income									182.8				2.1		184.9
Acquisitions resulting in noncontrolling interest													1.2		1.2
Purchase of noncontrolling interest					(5.5)								(9.5)		(15.0)
Distributions to shareholders of noncontrolling interests													(7.1)		(7.1)
Purchase of treasury stock											(555.6)				(555.6)
Retirement of treasury stock	(7.7)						(555.6)				555.6				—
Stock options exercised	4.4				135.3										135.3
Dividends declared							(155.7)								(155.7)
Stock-based compensation expense					37.1										37.1
Balance as of September 30, 2017	305.0	$	0.3	$	1,187.8	$	3,165.3	$	(286.2)	$	—	$	42.1	$	4,109.3

Schedules of dividends

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Dividends declared per share	$	0.23	$	0.19	$	0.65	$	0.51
Dividends declared	$	69.3	$	57.9	$	195.6	$	155.7
Dividends paid (including those declared in the prior year)		69.0		48.8		184.4		147.1