Shareholders' Equity and Noncontrolling Interests (Tables)

6 Months Ended

Jun. 30, 2019

Rollforward of consolidated changes in equity

A rollforward of consolidated changes in equity for the three months ended June 30, 2019 is as follows:

	Amphenol Corporation Shareholders
											Accumulated
	Common Stock			Treasury Stock							Other
	Shares			Shares			Additional		Retained		Comprehensive		Noncontrolling		Total
	(in millions)	Amount		(in millions)	Amount		Paid-In Capital		Earnings		Loss		Interests		Equity
Balance as of March 31, 2019	299.4	$	0.3	(1.4)	$	(119.7)	$	1,485.2	$	3,142.1	$	(384.8)	$	47.3	$	4,170.4
Net income										288.4				2.5		290.9
Other comprehensive income (loss)												(12.1)		(1.0)		(13.1)
Acquisitions resulting in noncontrolling interest														10.0		10.0
Purchase of noncontrolling interest								(17.5)						(3.9)		(21.4)
Purchase of treasury stock				(2.6)		(248.7)										(248.7)
Retirement of treasury stock	(2.6)			2.6		248.7				(248.7)						—
Stock options exercised	1.6			0.2		18.2		58.7		(8.9)						68.0
Dividends declared ($0.23 per common share)										(68.3)						(68.3)
Stock-based compensation expense								15.4								15.4
Balance as of June 30, 2019	298.4	$	0.3	(1.2)	$	(101.5)	$	1,541.8	$	3,104.6	$	(396.9)	$	54.9	$	4,203.2

A rollforward of consolidated changes in equity for the six months ended June 30, 2019 is as follows:

	Amphenol Corporation Shareholders
											Accumulated
	Common Stock			Treasury Stock							Other
	Shares			Shares			Additional		Retained		Comprehensive		Noncontrolling		Total
	(in millions)	Amount		(in millions)	Amount		Paid-In Capital		Earnings		Loss		Interests		Equity
Balance as of December 31, 2018	299.2	$	0.3	(0.7)	$	(55.0)	$	1,433.2	$	3,028.7	$	(390.2)	$	47.2	$	4,064.2
Net income										556.0				4.8		560.8
Other comprehensive income (loss)												(6.7)		—		(6.7)
Acquisitions resulting in noncontrolling interest														10.0		10.0
Purchase of noncontrolling interest								(17.5)						(3.9)		(21.4)
Distributions to shareholders of noncontrolling interests														(3.2)		(3.2)
Purchase of treasury stock				(4.4)		(408.7)										(408.7)
Retirement of treasury stock	(3.4)			3.4		321.1				(321.1)						—
Stock options exercised	2.6			0.5		41.1		96.3		(22.2)						115.2
Dividends declared ($0.46 per common share)										(136.8)						(136.8)
Stock-based compensation expense								29.8								29.8
Balance as of June 30, 2019	298.4	$	0.3	(1.2)	$	(101.5)	$	1,541.8	$	3,104.6	$	(396.9)	$	54.9	$	4,203.2

A rollforward of consolidated changes in equity for the three months ended June 30, 2018 is as follows:

	Amphenol Corporation Shareholders
											Accumulated
	Common Stock			Treasury Stock							Other
	Shares			Shares			Additional		Retained		Comprehensive		Noncontrolling		Total
	(in millions)	Amount		(in millions)	Amount		Paid-In Capital		Earnings		Loss		Interests		Equity
Balance as of March 31, 2018	302.1	$	0.3	—	$	—	$	1,282.4	$	2,770.9	$	(139.7)	$	54.0	$	3,967.9
Net income										284.8				3.0		287.8
Other comprehensive income (loss)												(149.0)		(2.5)		(151.5)
Acquisitions resulting in noncontrolling interest														0.2		0.2
Distributions to shareholders of noncontrolling interests														(3.2)		(3.2)
Purchase of treasury stock				(3.1)		(263.4)										(263.4)
Retirement of treasury stock	(3.1)			3.1		263.4				(263.4)						—
Stock options exercised	0.7							30.5								30.5
Dividends declared ($0.23 per common share)										(69.0)						(69.0)
Stock-based compensation expense								13.3								13.3
Balance as of June 30, 2018	299.7	$	0.3	—	$	—	$	1,326.2	$	2,723.3	$	(288.7)	$	51.5	$	3,812.6

A rollforward of consolidated changes in equity for the six months ended June 30, 2018 is as follows:

	Amphenol Corporation Shareholders
											Accumulated
	Common Stock			Treasury Stock							Other
	Shares			Shares			Additional		Retained		Comprehensive		Noncontrolling		Total
	(in millions)	Amount		(in millions)	Amount		Paid-In Capital		Earnings		Loss		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										3.2						3.2
Net income										550.4				5.7		556.1
Other comprehensive income (loss)												(87.7)		(1.0)		(88.7)
Acquisitions resulting in noncontrolling interest														0.3		0.3
Distributions to shareholders of noncontrolling interests														(7.1)		(7.1)
Purchase of treasury stock				(7.3)		(645.4)										(645.4)
Retirement of treasury stock	(7.3)			7.3		645.4				(645.4)						—
Stock options exercised	1.3							51.2								51.2
Dividends declared ($0.42 per common share)										(126.4)						(126.4)
Stock-based compensation expense								26.0								26.0
Balance as of June 30, 2018	299.7	$	0.3	—	$	—	$	1,326.2	$	2,723.3	$	(288.7)	$	51.5	$	3,812.6

Schedules of dividends

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Dividends declared	$	68.3	$	69.0	$	136.8	$	126.4
Dividends paid (including those declared in the prior year)		68.5		57.4		137.2		115.5