Amphenol (APH) 10-Q 2 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 31, 2017
Document and Entity Information
Entity Registrant Name	AMPHENOL CORP /DE/
Entity Central Index Key	820,313
Document Type	10-Q
Document Period End Date	Sep. 30, 2017
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		305,339,096
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 1,452.2	$ 1,034.6
Short-term investments	37.4	138.6
Total cash, cash equivalents and short-term investments	1,489.6	1,173.2
Accounts receivable, less allowance for doubtful accounts of $19.4 and $23.6, respectively	1,575.5	1,349.3
Inventories	1,098.2	928.9
Other current assets	189.6	139.8
Total current assets	4,352.9	3,591.2
Property, plant and equipment, less accumulated depreciation of $1,156.4 and $1,007.2, respectively	790.1	711.4
Goodwill	3,969.3	3,678.8
Intangibles, net and other long-term assets	496.5	517.3
Total assets	9,608.8	8,498.7
Current Liabilities:
Accounts payable	826.8	678.2
Accrued salaries, wages and employee benefits	143.4	131.8
Accrued income taxes	102	125.1
Accrued dividends	57.9	49.3
Other accrued expenses	302.5	275.6
Current portion of long-term debt	1.1	375.2
Total current liabilities	1,433.7	1,635.2
Long-term debt, less current portion	3,559.7	2,635.5
Accrued pension and postretirement benefit obligations	285	288.4
Other long-term liabilities	221.1	216.5
Equity:
Common stock	0.3	0.3
Additional paid-in capital	1,187.8	1,020.9
Retained earnings	3,165.3	3,122.7
Accumulated other comprehensive loss	(286.2)	(469)
Total shareholders' equity attributable to Amphenol Corporation	4,067.2	3,674.9
Noncontrolling interests	42.1	48.2
Total equity	4,109.3	3,723.1
Total liabilities and equity	$ 9,608.8	$ 8,498.7

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
CONDENSED CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowance for doubtful accounts	$ 19.4	$ 23.6
Accumulated depreciation	$ 1,156.4	$ 1,007.2

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
CONDENSED CONSOLIDATED STATEMENTS OF INCOME
Net sales	$ 1,840.8	$ 1,635.9	$ 5,067.4	$ 4,635.3
Cost of sales	1,234.7	1,098.6	3,392.8	3,141.3
Gross profit	606.1	537.3	1,674.6	1,494
Acquisition-related expenses		6.3	4	36.6
Selling, general and administrative expenses	228.2	204.7	642.4	591.3
Operating income	377.9	326.3	1,028.2	866.1
Interest expense	(24.6)	(18.1)	(67.3)	(54.2)
Other income, net	5.1	2.3	12.9	5
Income before income taxes	358.4	310.5	973.8	816.9
Provision for income taxes	(78.1)	(83.4)	(212.7)	(222.6)
Net income	280.3	227.1	761.1	594.3
Less: Net income attributable to noncontrolling interests	(2.8)	(2.8)	(7.2)	(6.8)
Net income attributable to Amphenol Corporation	$ 277.5	$ 224.3	$ 753.9	$ 587.5
Net income per common share - Basic (in dollars per share)	$ 0.91	$ 0.73	$ 2.47	$ 1.91
Weighted average common shares outstanding - Basic (in shares)	305	308.9	305.8	308.3
Net income per common share - Diluted (in dollars per share)	$ 0.88	$ 0.71	$ 2.39	$ 1.86
Weighted average common shares outstanding - Diluted (in shares)	315.7	315.7	316.1	315.1
Dividends declared per common share (in dollars per share)	$ 0.19	$ 0.14	$ 0.51	$ 0.42

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 280.3	$ 227.1	$ 761.1	$ 594.3
Total other comprehensive income, net of tax:
Foreign currency translation adjustments	52.1	26	172.4	37.3
Unrealized gain (loss) on cash flow hedges	(0.6)	1.3		2.3
Defined benefit plan adjustment, net of tax of ($2.2) and ($6.7) for 2017 and ($2.2) and ($6.6) for 2016, respectively	4.2	4	12.5	12
Total other comprehensive income, net of tax	55.7	31.3	184.9	51.6
Total comprehensive income	336	258.4	946	645.9
Less: Comprehensive income attributable to noncontrolling interests	(3.6)	(2.7)	(9.3)	(6.2)
Comprehensive income attributable to Amphenol Corporation	$ 332.4	$ 255.7	$ 936.7	$ 639.7

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Defined benefit plan adjustment, tax	$ (2.2)	$ (2.2)	$ (6.7)	$ (6.6)

CONDENSED CONSOLIDATED STATEME7

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOW - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash from operating activities:
Net income	$ 761.1	$ 594.3
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	168.5	163.6
Stock-based compensation expense	37.1	35.5
Excess tax benefits from stock-based compensation payment arrangements		(33.2)
Net change in components of working capital	(252.8)	(27.4)
Net change in other long-term assets and liabilities	2.5	(4.1)
Net cash provided by operating activities	716.4	728.7
Cash from investing activities:
Capital expenditures	(155.8)	(136.3)
Proceeds from disposals of property, plant and equipment	2	4
Purchases of short-term investments	(36.1)	(173.3)
Sales and maturities of short-term investments	140.4	33.3
Acquisitions, net of cash acquired	(243.5)	(1,272.6)
Net cash used in investing activities	(293)	(1,544.9)
Cash from financing activities:
Proceeds from issuance of senior notes, net	749.3
Repayments of long-term debt	(375)
Borrowings under commercial paper program, net	173.6	145.8
Payment of costs related to debt financing	(5.2)	(3)
Proceeds from exercise of stock options	134.4	120.8
Excess tax benefits from stock-based compensation payment arrangements		33.2
Distributions to and purchases of noncontrolling interests	(22.1)	(5.8)
Purchase and retirement of treasury stock	(555.6)	(229.6)
Dividend payments	(147.1)	(129.4)
Net cash used in financing activities	(47.7)	(68)
Effect of exchange rate changes on cash and cash equivalents	41.9	0.6
Net change in cash and cash equivalents	417.6	(883.6)
Cash and cash equivalents balance, beginning of period	1,034.6	1,737.2
Cash and cash equivalents balance, end of period	1,452.2	853.6
Cash paid for:
Interest	78	65.2
Income taxes	$ 244.1	$ 192.4

Basis of Presentation and Princ

Basis of Presentation and Principles of Consolidation	9 Months Ended
	Sep. 30, 2017
Basis of Presentation and Principles of Consolidation
Basis of Presentation and Principles of Consolidation	AMPHENOL CORPORATION NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited) (dollars in millions, except per share data) Note 1—Basis of Presentation and Principles of Consolidation The condensed consolidated balance sheets as of September 30, 2017 and December 31, 2016, the related condensed consolidated statements of income and condensed consolidated statements of comprehensive income for the three and nine months ended September 30, 2017 and 2016, and the related condensed consolidated statements of cash flow for the nine months ended September 30, 2017 and 2016 include the accounts of Amphenol Corporation and its subsidiaries ( “Amphenol”, the “Company”, “we”, “our”, or “us” ). All material intercompany balances and transactions have been eliminated in consolidation. The condensed consolidated financial statements included herein are unaudited. In the opinion of management, all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation in conformity with accounting principles generally accepted in the United States of America have been included. The results of operations for the three and nine months ended September 30, 2017 are not necessarily indicative of the results to be expected for the full year. These condensed consolidated financial statements and the related notes should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2016 (the “2016 Annual Report”).

New Accounting Pronouncements

New Accounting Pronouncements	9 Months Ended
	Sep. 30, 2017
New Accounting Pronouncements
New Accounting Pronouncements	Note 2—New Accounting Pronouncements Recently Adopted Accounting Standards In March 2016, the FASB issued ASU 2016‑09 , Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (“ASU 2016‑09”), which simplifies certain provisions associated with the accounting for stock compensation. ASU 2016‑09 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016, with early adoption permitted. Effective January 1, 2017, the Company adopted ASU 2016‑09, which requires any excess tax benefits and tax deficiencies to be recorded as a discrete income tax item in the statement of income in the period in which they occur. For the three and nine months ended September 30, 2017, this change resulted in the recognition of tax benefits of approximately $16.6 (or $0.05 per share) and $45.8 (or $0.14 per share), respectively, within the provision for income taxes in the accompanying Condensed Consolidated Statements of Income. Under previous accounting guidance, these tax benefits would have been recorded directly to equity. Since this provision of the standard was applied prospectively, there was no impact to prior periods. As of January 1, 2017, the Company did not have any unrecognized excess tax benefits in which the related tax deduction did not reduce income taxes payable and therefore, there was no cumulative-effect adjustment to beginning retained earnings. The ASU also eliminated the requirement to reclassify cash flows related to excess tax benefits from operating activities to financing activities in the statement of cash flows, but rather requires such excess tax benefits and deficiencies to be classified within operating activities, consistent with other cash flows related to income taxes. The Company adopted this provision prospectively, and prior period amounts in the Statements of Cash Flow have not been adjusted. As permitted, the Company elected to continue its existing accounting practice of estimating forfeitures when recognizing stock-based compensation expense. Other provisions of this standard did not and are not expected to have a material impact on our consolidated financial statements. T he impact of this guidance on our consolidated financial statements could result in significant fluctuations in our effective tax rate in the future, since the provision for income taxes will be impacted by the timing and intrinsic value of future stock-based compensation award exercises. Refer to Note 6, Note 8 and Note 15 for further discussion on the impact of this standard. In January 2017, the FASB issued ASU 2017-04, Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment (“ASU 2017-04”), which eliminates Step 2 of the two-step goodwill impairment assessment process requiring an entity to calculate any impairment as the difference between a reporting unit’s implied fair value of goodwill and the carrying value of the goodwill. Rather, ASU 2017-04 would now require any goodwill impairment charges to be calculated as the difference between a reporting unit’s fair value and its carrying value, with the loss being limited to its carrying value. ASU 2017-04 is effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2019 with prospective application, and early adoption is allowed. Although the Company early adopted ASU 2017-04 in the third quarter of 2017 in conjunction with its annual impairment assessment, the Company concluded that a Step 1 assessment was not required given the results of our annual impairment assessment discussed in Note 12 herein. As such, ASU 2017-04 did not have any impact on the Company’s consolidated financial statements. Recently Issued Accounting Standards In May 2014, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update No. (“ASU”) 2014‑09, Revenue from Contracts with Customers (“ASU 2014‑09”), which stipulates that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for such goods or services. To achieve this core principle, an entity should apply the following steps: (1) identify the contract(s) with a customer, (2) identify the performance obligations in the contract(s), (3) determine the transaction price(s), (4) allocate the transaction price(s) to the performance obligations in the contract(s), and (5) recognize revenue when (or as) the entity satisfies a performance obligation. The guidance also requires enhanced disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from an entity’s contracts with customers. The guidance under ASU 2014‑09 shall apply for annual reporting periods beginning after December 15, 2017, including interim reporting periods within that period. Since 2014, the FASB has issued various related updates including, but not limited to, ASU 2016‑08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net) , which clarified the implementation guidance on principal versus agent considerations, and ASU 2016‑10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing , which clarified the implementation guidance regarding performance obligations and licensing arrangements. The Company has an implementation plan involving teams across our organization to review and implement the requirements of ASU 2014‑09. We have substantially completed the review of our existing contracts and the related revenue streams, and based on the results of this review, we expect most of our revenue to be recognized on a “point-in-time” basis which is consistent with current practice, with a small portion of our revenue to be recognized “over time” under the new standard. In the third quarter of 2017, we began making system reporting changes to incorporate the impact of the new standard into our financial reporting processes; implementing the related internal controls, policies, and processes; and drafting the required disclosures. We will expand our financial statement disclosures in the first quarter of 2018 to comply with this new standard, specifically regarding the disaggregation of revenue and performance obligations, among other requirements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) (“ASU 2016‑02”), which amends, among other things, the existing guidance by requiring lessees to recognize lease assets (right-to-use) and liabilities (for reasonably certain lease payments) arising from operating leases on the balance sheet. For leases with a term of twelve months or less, ASU 2016‑02 permits an entity to make an accounting policy election to recognize such leases as lease expense, generally on a straight-line basis over the lease term. ASU 2016‑02 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018 using a modified retrospective approach, with early adoption permitted. The Company has begun evaluating ASU 2016‑02, including the initial review of any necessary changes to our existing processes and systems that will be required to implement this new standard, in order to determine its impact on our consolidated financial statements and related disclosures. In March 2017, the FASB issued ASU 2017‑07, Compensation—Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (“ASU 2017‑07”), requiring employers to provide more details about the components of costs related to retirement benefits. Specifically, ASU 2017‑07 requires employers to report the service costs for providing pensions to employees in the same line item as other employee compensation costs, while the other pension-related costs such as interest costs, amortization of pension-related costs from prior periods, and the gains or losses on plan assets, should be reported separately and outside of the subtotal of operating income. ASU 2017‑07 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, with early adoption permitted only if adopted in the first quarter of the Company’s fiscal year. The Company has evaluated ASU 2017‑07, which requires certain expenses to be reclassified within the income statement, and we do not expect the reclassification to be material. The Company will adopt this new standard in the first quarter of 2018. In May 2017, the FASB issued ASU 2017‑09, Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting (“ASU 2017‑09”), which provides guidance to determine which changes to the terms or conditions of share-based payment awards require an entity to apply modification accounting in Topic 718. ASU 2017‑09 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, with early adoption permitted, and requires prospective application to changes in terms or conditions of awards occurring on or after the adoption date. The Company is evaluating ASU 2017‑09 and we do not believe it will have a material impact on our consolidated financial statements.

Inventories

Inventories	9 Months Ended
	Sep. 30, 2017
Inventories
Inventories	Note 3—Inventories Inventories consist of: September 30, December 31, 2017 2016 Raw materials and supplies $ 384.5 $ 319.8 Work in process 366.8 313.4 Finished goods 346.9 295.7 $ 1,098.2 $ 928.9

Reportable Business Segments

Reportable Business Segments	9 Months Ended
	Sep. 30, 2017
Reportable Business Segments
Reportable Business Segments	Note 4—Reportable Business Segments The Company has two reportable business segments: (i) Interconnect Products and Assemblies and (ii) Cable Products and Solutions. The Company organizes its reportable business segments based upon similar economic characteristics and business groupings of products, services and customers. These reportable business segments are determined based upon how the Company reviews its businesses, assesses operating performance and makes investing and resource allocation decisions. The Interconnect Product and Assemblies segment primarily designs, manufactures and markets a broad range of connector and connector systems, value-add products and other products, including antennas and sensors, used in a broad range of applications in a diverse set of end markets. The Cable Products and Solutions segment primarily designs, manufactures and markets cable, value-add products and components for use primarily in the broadband communications and information technology markets as well as certain applications in other markets. The accounting policies of the segments are the same as those for the Company as a whole and are described in Note 1 of the notes to the consolidated financial statements in the Company’s 2016 Annual Report. The Company evaluates the performance of business units on, among other things, profit or loss from operations before interest, headquarters’ expense allocations, stock-based compensation expense, income taxes, amortization related to certain intangible assets and nonrecurring gains and losses. The segment results for the three and nine months ended September 30, 2017 and 2016 are as follows: Interconnect Products Cable Products Total Reportable and Assemblies and Solutions Business Segments Three Months Ended September 30: 2017 2016 2017 2016 2017 2016 Net sales: External $ 1,731.5 $ 1,543.2 $ 109.3 $ 92.7 $ 1,840.8 $ 1,635.9 Intersegment 2.7 1.5 10.9 8.7 13.6 10.2 Segment operating income 388.3 342.0 14.3 13.8 402.6 355.8 Nine Months Ended September 30: Net sales: External $ 4,754.3 $ 4,366.9 $ 313.1 $ 268.4 $ 5,067.4 $ 4,635.3 Intersegment 6.9 5.0 31.5 21.6 38.4 26.6 Segment operating income 1,060.8 932.2 44.0 38.6 1,104.8 970.8 A reconciliation of segment operating income to consolidated income before income taxes for the three and nine months ended September 30, 2017 and 2016 is summarized as follows: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Segment operating income $ 402.6 $ 355.8 $ 1,104.8 $ 970.8 Interest expense (24.6) (18.1) (67.3) (54.2) Other income, net 5.1 2.3 12.9 5.0 Stock-based compensation expense (12.6) (12.2) (37.1) (35.5) Acquisition-related expenses — (6.3) (4.0) (36.6) Other operating expenses (12.1) (11.0) (35.5) (32.6) Income before income taxes $ 358.4 $ 310.5 $ 973.8 $ 816.9

Changes in Equity and Noncontro

Changes in Equity and Noncontrolling Interests	9 Months Ended
	Sep. 30, 2017
Equity
Changes in Equity and Noncontrolling Interests	Note 5—Changes in Equity and Noncontrolling Interests Net income attributable to noncontrolling interests is classified below net income. Earnings per share is determined after the impact of the noncontrolling interests’ share in net income of the Company. In addition, the equity attributable to noncontrolling interests is presented as a separate caption within equity. 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 A rollforward of consolidated changes in equity for the nine months ended September 30, 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 587.5 6.8 594.3 Other comprehensive income (loss) 52.2 (0.6) 51.6 Acquisitions resulting in noncontrolling interest 6.4 6.4 Distributions to shareholders of noncontrolling interests (5.8) (5.8) Purchase of treasury stock (229.6) (229.6) Retirement of treasury stock (4.0) (229.6) 229.6 — Stock options exercised, including tax benefit 4.7 153.4 153.4 Dividends declared (129.5) (129.5) Stock-based compensation expense 35.5 35.5 Balance as of September 30, 2016 308.7 $ 0.3 $ 972.2 $ 3,032.8 $ (297.3) $ — $ 46.7 $ 3,754.7

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share
Earnings Per Share	Note 6—Earnings Per Share Basic earnings per share (“EPS”) is computed by dividing net income attributable to Amphenol Corporation by the weighted average number of common shares outstanding. Diluted EPS is computed by dividing net income attributable to Amphenol Corporation by the weighted average number of common shares and dilutive common shares outstanding, which relates to stock options. A reconciliation of the basic weighted average common shares outstanding to diluted weighted average common shares outstanding for the three and nine months ended September 30, 2017 and 2016 is as follows: Three Months Ended September 30, Nine Months Ended September 30, (dollars and shares in millions, except per share data) 2017 2016 2017 2016 Net income attributable to Amphenol Corporation shareholders $ 277.5 $ 224.3 $ 753.9 $ 587.5 Basic weighted average common shares outstanding 305.0 305.8 Effect of dilutive stock options 10.7 10.3 Diluted weighted average common shares outstanding 315.7 316.1 Earnings per share attributable to Amphenol Corporation shareholders: Basic $ 0.91 $ 0.73 $ 2.47 $ 1.91 Diluted $ 0.88 $ 0.71 $ 2.39 $ 1.86 Excluded from the computations above were anti-dilutive common shares of 5.3 million and 13.2 million for the three months ended September 30, 2017 and 2016, respectively and 2.1 million and 11.0 million for the nine months ended September 30, 2017 and 2016, respectively. In addition to the impact on the provision for income taxes discussed in Note 2 herein, the adoption of ASU 2016-09 in 2017 requires that excess tax benefits and tax deficiencies be excluded from the assumed proceeds available in cal culating the dilutive effect of stock options under the treasury stock method . As required, the Company adopted this provision of the new standard prospectively, which had the effect of increasing the Company’s diluted weighted average common shares outstanding by approximately two million shares for both the three and nine months ended September 30, 2017.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies
Commitments and Contingencies	Note 7—Commitments and Contingencies The Company has been named as a defendant in several legal actions arising from normal business activities. The Company records a loss contingency liability when a loss is considered probable and the amount can be reasonably estimated. Although the potential liability with respect to certain of such legal actions cannot be reasonably estimated, none of such matters is expected to have a material adverse effect on the Company’s financial condition, results of operations or cash flows. The Company’s legal costs associated with defending itself are recorded to expense as incurred. Certain operations of the Company are subject to environmental laws and regulations which govern the discharge of pollutants into the air and water, as well as the handling and disposal of solid and hazardous wastes. The Company believes that its operations are currently in substantial compliance with applicable environmental laws and regulations and that the costs of continuing compliance will not have a material adverse effect on the Company’s financial condition, results of operations or cash flows.

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2017
Stock-Based Compensation
Stock-Based Compensation	Note 8—Stock-Based Compensation For the three months ended September 30, 2017 and 2016, the Company’s income before income taxes was reduced for stock-based compensation expense of $12.6 and $12.2, respectively, and for the nine months ended September 30, 2017 and 2016, the Company’s income before income taxes was reduced for stock-based compensation expense of $37.1 and $35.5, respectively. In addition, for the three months ended September 30, 2017 and 2016, the Company recognized income tax benefits associated with stock-based compensation of $19.5 and $2.9, respectively, and for the nine months ended September 30, 2017 and 2016, the Company recognized income tax benefits associated with stock-based compensation of $54.7 and $8.5, respectively. The income tax benefits during the three and nine months ended September 30, 2017 above include the tax benefit from option exercises during such periods in accordance with ASU 2016‑09 (Note 2). Under previous accounting guidance, a portion of this benefit would have been recorded directly to equity. The income tax benefit associated with stock options is included in the provision for income taxes in the accompanying Condensed Consolidated Statements of Income. Stock-based compensation expense includes the estimated effects of forfeitures, which are adjusted over the requisite service period to the extent actual forfeitures differ or are expected to differ from such estimates. Changes in estimated forfeitures are recognized in the period of change and impact the amount of expense to be recognized in future periods. The expense incurred for stock-based compensation is included in Selling, general and administrative expense in the accompanying Condensed Consolidated Statements of Income. Stock Options In May 2017, the Company adopted the 2017 Stock Purchase and Option Plan for Key Employees of Amphenol and Subsidiaries (the “2017 Employee Option Plan”). The Company also continues to maintain the 2009 Stock Purchase and Option Plan for Key Employees of Amphenol and Subsidiaries, as amended (the “2009 Employee Option Plan”) and the 2000 Stock Purchase and Option Plan for Key Employees of Amphenol and Subsidiaries, as amended (the “2000 Employee Option Plan”), although no additional stock options will be granted under the 2009 Employee Option Plan or the 2000 Employee Option Plan. A committee of the Company’s Board of Directors has been authorized to grant stock options pursuant to the 2017 Employee Option Plan. The number of shares of the Company’s Class A Common Stock (“Common Stock”) reserved for issuance under the 2017 Employee Option Plan is 30,000,000 shares. As of September 30, 2017, there were 22,970,400 shares of Common Stock available for the granting of additional stock options under the 2017 Employee Option Plan. Options granted under the 2017 Employee Option Plan and the 2009 Employee Option Plan generally vest ratably over a period of five years from the date of grant and are generally exercisable over a period of ten years from the date of grant. Options granted under the 2000 Employee Option Plan are fully vested and are generally exercisable over a period of ten years from the date of grant. In 2004, the Company adopted the 2004 Stock Option Plan for Directors of Amphenol Corporation (the “2004 Directors Option Plan”). The 2004 Directors Option Plan is administered by the Company’s Board of Directors. As of September 30, 2017, there were 140,000 shares of Common Stock available for the granting of additional stock options under the 2004 Directors Option Plan, although no additional stock options are expected to be granted under this plan. Options were last granted under the 2004 Directors Option Plan in May 2011. Options granted under the 2004 Directors Option Plan are fully vested and are generally exercisable over a period of ten years from the date of grant. Stock option activity for the three and nine months ended September 30, 2017 was as follows: Weighted Average Aggregate Weighted Remaining Intrinsic Average Contractual Value Options Exercise Price Term (in years) (in millions) Options outstanding at January 1, 2017 32,266,391 $ 44.14 7.03 $ 744.1 Options granted — Options exercised (834,925) Options forfeited (45,660) Options outstanding at March 31, 2017 31,385,806 44.54 6.85 835.7 Options granted 6,886,600 Options exercised (1,759,976) Options forfeited (70,160) Options outstanding at June 30, 2017 36,442,270 50.65 7.33 844.3 Options granted 143,000 Options exercised (1,757,971) Options forfeited (27,400) Options outstanding at September 30, 2017 34,799,899 $ 51.56 7.20 $ 1,151.2 Vested and non-vested options expected to vest at September 30, 2017 32,626,495 $ 50.85 7.11 $ 1,102.3 Exercisable options at September 30, 2017 15,026,939 $ 38.97 5.58 $ 686.2 A summary of the status of the Company’s non-vested options as of September 30, 2017 and changes during the three and nine months then ended is as follows: Weighted Average Fair Value at Grant Options Date Non-vested options at January 1, 2017 18,725,570 $ 7.99 Options granted — — Options vested (82,740) 8.17 Options forfeited (45,660) 7.84 Non-vested options at March 31, 2017 18,597,170 7.98 Options granted 6,886,600 8.77 Options vested (5,668,910) 7.91 Options forfeited (70,160) 8.20 Non-vested options at June 30, 2017 19,744,700 8.28 Options granted 143,000 9.33 Options vested (87,340) 8.07 Options forfeited (27,400) 7.94 Non-vested options at September 30, 2017 19,772,960 $ 8.29 During the three and nine months ended September 30, 2017 and 2016, the following activity occurred under the Company’s option plans: Three Months Ended Nine Months Ended September 30, September 30, 2017 2016 2017 2016 Total intrinsic value of stock options exercised $ 77.0 $ 72.7 $ 191.1 $ 155.3 Total fair value of stock options vested 0.7 0.6 46.2 43.0 As of September 30, 2017, the total compensation cost related to non-vested options not yet recognized was approximately $132.6 with a weighted average expected amortization period of 3.48 years. The grant-date fair value of each option grant under the 2000 Employee Option Plan, the 2009 Employee Option Plan, the 2017 Employee Option Plan and the 2004 Directors Option Plan is estimated using the Black-Scholes option pricing model. The grant-date fair value of each share grant is determined based on the closing share price of the Company’s Common Stock on the date of the grant. The fair value is then amortized on a straight-line basis over the requisite service period of the awards, which is generally the vesting period. Use of a valuation model for option grants requires management to make certain assumptions with respect to selected model inputs. Expected share price volatility is calculated based on the historical volatility of the Common Stock and implied volatility derived from related exchange traded options. The average expected life is based on the contractual term of the option and expected exercise and historical post-vesting termination experience. The risk-free interest rate is based on U.S. Treasury zero-coupon issuances with a remaining term equal to the expected life assumed at the date of grant. The expected annual dividend per share is based on the Company’s dividend rate. Restricted Shares In 2012, the Company adopted the 2012 Restricted Stock Plan for Directors of Amphenol Corporation (the “2012 Directors Restricted Stock Plan”). The 2012 Directors Restricted Stock Plan is administered by the Company’s Board of Directors. As of September 30, 2017, the number of restricted shares available for grant under the 2012 Directors Restricted Stock Plan was 124,164. Restricted shares granted under the 2012 Directors Restricted Stock Plan generally vest on the first anniversary of the grant date. Grants under the 2012 Directors Restricted Stock Plan entitle the holder to receive shares of the Company’s Common Stock without payment. Restricted share activity for the three and nine months ended September 30, 2017 was as follows: Weighted Average Remaining Restricted Fair Value at Amortization Term Shares Grant Date (in years) Restricted shares outstanding at January 1, 2017 16,905 $ 57.99 0.38 Restricted shares granted — — Restricted shares outstanding at March 31, 2017 16,905 57.99 0.13 Shares vested and issued (16,905) 57.99 Restricted shares granted 11,526 72.90 Restricted shares outstanding at June 30, 2017 11,526 72.90 0.89 Restricted shares granted 1,379 76.13 Restricted shares outstanding at September 30, 2017 12,905 $ 73.25 0.65 As of September 30, 2017, the total compensation cost related to non-vested restricted shares not yet recognized was approximately $0.6 with a weighted average expected amortization period of 0.65 years.

Shareholders' Equity

Shareholders' Equity	9 Months Ended
	Sep. 30, 2017
Shareholders’ Equity
Shareholders' Equity	Note 9—Shareholders’ Equity On January 24, 2017, the Company’s Board of Directors authorized a new stock repurchase program under which the Company may purchase up to $1,000.0 of the Company’s Common Stock during the two-year period ending January 24, 2019 in accordance with the requirements of Rule 10b-18 of the Exchange Act (the “2017 Stock Repurchase Program”). During the nine months ended September 30, 2017, the Company repurchased 7.7 million shares of its common stock for $555.6. These treasury shares have been retired by the Company and common stock and retained earnings were reduced accordingly. The Company has not repurchased any additional shares of its common stock through October 31, 2017. As of October 31, 2017, the Company has remaining authorization to purchase up to approximately $444.4 of its common stock under the 2017 Stock Repurchase Program. The price and timing of any future purchases under the 2017 Stock Repurchase Program will depend on factors such as levels of cash generation from operations, the volume of stock option exercises by employees, cash requirements for acquisitions, dividends, economic and market conditions and stock price. Contingent upon declaration by the Board of Directors, the Company generally pays a quarterly dividend on shares of its Common Stock. In October 2016, the Board of Directors approved an increase in the quarterly dividend rate from $0.14 to $0.16 per share effective with dividends declared in the fourth quarter of 2016, and in July 2017, approved a further increase in the quarterly dividend rate from $0.16 to $0.19 per share effective with dividends declared in the third quarter of 2017. For the three and nine months ended September 30, 2017, the Company paid dividends in the amount of $48.8 and $147.1, respectively, and declared dividends in the amount of $57.9 and $155.7, respectively. For the three and nine months ended September 30, 2016, the Company paid dividends in the amount of $43.1 and $129.4, respectively, and declared dividends in the amount of $43.2 and $129.5, respectively.

Benefit Plans and Other Postret

Benefit Plans and Other Postretirement Benefits	9 Months Ended
	Sep. 30, 2017
Benefit Plans and Other Postretirement Benefits
Benefit Plans and Other Postretirement Benefits	Note 10—Benefit Plans and Other Postretirement Benefits The Company and certain of its domestic subsidiaries have defined benefit pension plans (the “U.S. Plans”), which cover certain U.S. employees and which represent the majority of the plan assets and benefit obligations of the aggregate defined benefit plans of the Company. The U.S. Plans’ benefits are generally based on years of service and compensation and are generally noncontributory. Certain U.S. employees not covered by the U.S. Plans are covered by defined contribution plans. Certain foreign subsidiaries have defined benefit plans covering their employees (the “International Plans” and, together with the U.S. Plans, the “Plans”). The following is a summary, based on the most recent actuarial valuations of the Company’s net cost for pension benefits, of the Plans and other postretirement benefits for the three and nine months ended September 30, 2017 and 2016: Other Postretirement Pension Benefits Benefits Three Months Ended September 30: 2017 2016 2017 2016 Service cost $ 2.5 $ 2.3 $ — $ — Interest cost 5.0 5.2 0.1 0.1 Expected return on plan assets (7.8) (7.6) — — Amortization of prior service cost 0.7 0.6 — — Amortization of net actuarial losses 5.8 5.6 0.2 0.2 Net pension expense $ 6.2 $ 6.1 $ 0.3 $ 0.3 Nine Months Ended September 30: Service cost $ 7.3 $ 6.9 $ — $ 0.1 Interest cost 14.9 15.8 0.3 0.3 Expected return on plan assets (23.2) (22.7) — — Amortization of transition obligation — (0.1) — — Amortization of prior service cost 2.1 1.7 — — Amortization of net actuarial losses 17.2 16.7 0.5 0.5 Net pension expense $ 18.3 $ 18.3 $ 0.8 $ 0.9 During the nine months ended September 30, 2017, the Company made cash contributions of approximately $17.0 to the U.S. Plans, and estimates that, based on current actuarial calculations, it will make aggregate cash contributions to the Plans in 2017 of approximately $25.0, the majority of which will be to the U.S. Plans. The timing and amount of cash contributions in subsequent years will depend on a number of factors, including the investment performance of the Plans’ assets. The Company offers various defined contribution plans for certain U.S. and foreign employees. Participation in these plans is based on certain eligibility requirements. The Company matches the majority of employee contributions to U.S. defined contribution plans with cash contributions up to a maximum of 5% of eligible compensation. During the nine months ended September 30, 2017 and 2016, the total matching contributions to the U.S. defined contribution plans were approximately $5.0 and $3.5, respectively.

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2017
Acquisitions
Acquisitions	Note 11—Acquisitions On January 8, 2016, the Company acquired all of the share capital of FCI Asia Pte Ltd (“FCI”) for a purchase price of approximately $1,178.6, net of cash acquired. The acquisition was funded by cash, cash equivalents and short-term investments that were held outside of the United States. The purchase price was allocated to the tangible and identifiable intangible assets acquired and liabilities assumed of FCI based upon their estimated fair values. In the fourth quarter of 2016, the Company completed its analysis of the fair value of the net assets acquired through the use of independent valuations and management’s estimates, as noted in the Company’s 2016 Annual Report . The Company completed several other acquisitions at the end of 2016 and throughout 2017 and is in the process of completing its analyses of the fair value of the assets acquired and liabilities assumed. The Company anticipates that the final assessments of values will not differ materially from the preliminary assessments. These other acquisitions were not material to the Company either individually or in the aggregate. Acquisition-related Expenses During the nine months ended September 30, 2017, the Company incurred approximately $4.0 ($3.7 after-tax) of acquisition-related expenses related to external transaction costs. During the nine months ended September 30, 2016, the Company incurred approximately $30.3 ($27.3 after-tax) of acquisition-related expenses in the first quarter of 2016 related to the acquisition of FCI, primarily related to external transaction costs, amortization related to the value associated with acquired backlog and post-closing restructuring charges; and approximately $6.3 ($5.8 after-tax) of acquisition-related transaction expenses in the third quarter of 2016 related to other 2016 acquisitions. Such acquisition-related expenses are separately presented in the accompanying Condensed Consolidated Statements of Income.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2017
Goodwill and Other Intangible Assets
Goodwill and Other Intangible Assets	Note 12—Goodwill and Other Intangible Assets The changes in the carrying amount of goodwill by segment were as follows: Interconnect Cable Products and Products and Assemblies Solutions Total Goodwill at December 31, 2016 $ 3,532.5 $ 146.3 $ 3,678.8 Acquisition-related 192.7 — 192.7 Foreign currency translation 97.8 — 97.8 Goodwill at September 30, 2017 $ 3,823.0 $ 146.3 $ 3,969.3 The Company performs its annual evaluation for the impairment of goodwill for the Company’s reporting units as of each July 1 or more frequently if an event occurs or circumstances change that would indicate that a reporting unit’s carrying amount may be impaired. The Company has defined its reporting units as the two reportable business segments “Interconnect Products and Assemblies” and “Cable Products and Solutions”, as the components of these reportable business segments have similar economic characteristics . In 2017, as part of our annual evaluation, the Company utilized the option to first assess qualitative factors to determine whether it is necessary to perform the quantitative goodwill impairment assessment. As part of this assessment, the Company reviews qualitative factors, which include but are not limited to, economic, market and industry conditions, as well as the financial performance of each reporting unit. In accordance with applicable guidance, an entity is not required to calculate the fair value of a reporting unit if, after assessing these qualitative factors, the Company determines that it is more likely than not that its reporting unit’s fair value is greater than its carrying amount. During the third quarter, the Company determined that it was more likely than not that the fair value of its reporting units exceeded their respective carrying amounts and therefore, a quantitative assessment was not required. The Company has not recognized any goodwill impairment in 2017, 2016 or 2015 in connection with its annual impairment test. Other than goodwill noted above, as well as indefinite-lived trade name intangible assets of approximately $186.1 as of September 30, 2017 and December 31, 2016, the Company’s intangible assets are subject to amortization. A summary of the Company’s amortizable intangible assets as of September 30, 2017 and December 31, 2016 is as follows: September 30, 2017 December 31, 2016 Gross Net Gross Net Carrying Accumulated Carrying Carrying Accumulated Carrying Amount Amortization Amount Amount Amortization Amount Customer relationships $ 390.2 $ 188.9 $ 201.3 $ 381.1 $ 159.1 $ 222.0 Proprietary technology 107.5 48.5 59.0 106.7 40.9 65.8 Backlog and other 34.0 33.6 0.4 34.0 33.5 0.5 Total $ 531.7 $ 271.0 $ 260.7 $ 521.8 $ 233.5 $ 288.3 Customer relationships, proprietary technology, and backlog and other amortizable intangible assets have weighted average useful lives of approximately 10 years, 11 years and 2 years, respectively, for an aggregate weighted average useful life of approximately 10 years at September 30, 2017. The Company reviews its identifiable intangible assets subject to amortization whenever events or changes in circumstances indicate the carrying amount may not be recoverable, while any indefinite-lived intangible assets that are not subject to amortization are reviewed at least annually for impairment. In the third quarter of 2017, the Company performed its annual assessment of these identifiable indefinite-lived intangible assets. Based on our qualitative assessment, the Company determined that it was more likely than not that the fair value of the indefinite-lived intangible assets exceeded their respective carrying amounts. There have been no impairments recorded in 2017, 2016 or 2015 as a result of such reviews. Intangible assets are included in Intangibles, net and other long-term assets in the accompanying Condensed Consolidated Balance Sheets. The amortization expense for the three months ended September 30, 2017 and 2016 was approximately $12.3 and $11.6, respectively. The amortization expense for the nine months ended September 30, 2017 and 2016 was approximately $36.4 and $42.8, respectively. Amortization expense for the nine months ended September 30, 2016 included $8.0 related to the amortization of acquired backlog from the FCI acquisition. As of September 30, 2017, amortization expense relating to the Company’s current intangible assets estimated for the remainder of 2017 is approximately $12.3 and for each of the next five fiscal years is approximately $45.2 in 2018, $41.3 in 2019, $35.9 in 2020, $30.4 in 2021 and $23.1 in 2022.

Debt

Debt	9 Months Ended
	Sep. 30, 2017
Debt
Debt	Note 13—Debt The Company’s debt (net of any unamortized discount) consists of the following: September 30, 2017 December 31, 2016 Carrying Approximate Carrying Approximate Amount Fair Value Amount Fair Value Revolving Credit Facility $ — $ — $ — $ — Commercial Paper Program 1,191.9 1,191.9 1,018.9 1,018.9 1.55% Senior Notes due September 2017 — — 374.9 375.4 2.55% Senior Notes due January 2019 749.7 756.1 749.5 758.3 2.20% Senior Notes due April 2020 399.7 400.6 — — 3.125% Senior Notes due September 2021 374.8 383.5 374.8 380.4 4.00% Senior Notes due February 2022 499.5 527.7 499.4 523.7 3.20% Senior Notes due April 2024 349.6 354.1 — — Notes payable to foreign banks and other debt 9.6 9.6 5.5 5.5 Less deferred debt issuance costs (14.0) — (12.3) — Total debt 3,560.8 3,623.5 3,010.7 3,062.2 Less current portion 1.1 1.1 375.2 375.7 Total long-term debt $ 3,559.7 $ 3,622.4 $ 2,635.5 $ 2,686.5 Revolving Credit Facility The Company has a $2,000.0 unsecured credit facility (the “Revolving Credit Facility”), which matures March 2021 and gives the Company the ability to borrow at a spread over LIBOR. The Company may utilize the Revolving Credit Facility for general corporate purposes. At September 30, 2017, there were no borrowings under the Revolving Credit Facility. The Revolving Credit Facility requires payment of certain annual agency and commitment fees and requires that the Company satisfy certain financial covenants. At September 30, 2017, the Company was in compliance with the financial covenants under the Revolving Credit Facility. Commercial Paper Program The Company has a commercial paper program (the “Commercial Paper Program”) pursuant to which the Company issues short-term unsecured commercial paper notes (“Commercial Paper”) in one or more private placements. Amounts available under the Commercial Paper Program are borrowed, repaid and re-borrowed from time to time. The maturities of the Commercial Paper vary, but may not exceed 397 days from the date of issue. The Commercial Paper is sold under customary terms in the commercial paper market and may be issued at a discount from par, or, alternatively, may be sold at par, and bears varying interest rates on a fixed or floating basis. The Commercial Paper Program is rated A-2 by Standard & Poor’s and P-2 by Moody’s and is backstopped by the Revolving Credit Facility. The maximum aggregate principal amount of the Commercial Paper outstanding under the Commercial Paper Program at any time is $2,000.0. The Commercial Paper is classified as long-term debt in the accompanying Condensed Consolidated Balance Sheets since the Company has the intent and ability to refinance the Commercial Paper on a long-term basis using the Revolving Credit Facility. The Commercial Paper is actively traded and is therefore classified as Level 1 in the fair value hierarchy (Note 14). The carrying value of Commercial Paper borrowings approximated their fair value. The average interest rate on the Commercial Paper as of September 30, 2017 was 1.48%. Senior Notes All of the Company’s outstanding senior notes, listed in the table above, are unsecured and rank equally in right of payment with the Company’s other unsecured senior indebtedness. Interest on each series of the senior notes is payable semiannually. The Company may, at its option, redeem some or all of any series of senior notes at any time subject to certain terms and conditions, which include paying 100% of the principal amount, plus accrued and unpaid interest, if any, to the date of repurchase and, with certain exceptions, a make-whole premium. The fair value of each series of senior notes is based on recent bid prices in an active market and is therefore classified as Level 1 in the fair value hierarchy (Note 14). On April 5, 2017, the Company issued $400.0 principal amount of unsecured 2.20% Senior Notes due April 1, 2020 at 99.922% of face value (the “2020 Senior Notes”) and $350.0 principal amount of unsecured 3.20% Senior Notes due April 1, 2024 at 99.888% of face value (the “ 2024 Senior Notes” and, together with the 2020 Senior Notes, the “Notes” ). Interest on each of these series of Notes is payable semiannually on April 1 and October 1 of each year, commencing on October 1, 2017. The Company may, at its option, redeem some or all of the 2020 Senior Notes at any time by paying 100% of the principal amount, plus accrued and unpaid interest, if any, to the date of repurchase, and if redeemed prior to the date of maturity, a make-whole premium. The Company may, at its option, redeem some or all of the 2024 Senior Notes at any time by paying 100% of the principal amount, plus accrued and unpaid interest, if any, to the date of repurchase, and if redeemed prior to February 1, 2024, a make-whole premium. For the nine months ended September 30, 2017, the Company incurred approximately $5.2 of costs related to the issuances of the Notes. In September 2017, the Company used the net proceeds from the Notes to repay all of its outstanding $375.0 1.55% Senior Notes that were due September 15, 2017, with the re mainder of the net proceeds being used for general corporate purposes. As of December 31, 2016, such 1.55% Senior Notes were recorded, net of the related unamortized discount and debt issuance costs, within Current portion of long-term debt in the accompanying Condensed Consolidated Balance Sheets.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2017
Fair Value Measurements
Fair Value Measurements	Note 14—Fair Value Measurements Fair value is determined based on the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants. These requirements establish market or observable inputs as the preferred source of values. Assumptions based on hypothetical transactions are used in the absence of market inputs. The Company does not have any non-financial instruments accounted for at fair value on a recurring basis. The valuation techniques required are based upon observable and unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s market assumptions. These two types of inputs create the following fair value hierarchy: Level 1 Quoted prices for identical instruments in active markets. Level 2 Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value drivers are observable. Level 3 Significant inputs to the valuation model are unobservable. The Company believes that the assets or liabilities subject to such standards with fair value disclosure requirements are short-term investments and derivative instruments. Substantially all of the Company’s short-term investments consist of certificates of deposit with original maturities of twelve months or less and as such, are considered as Level 1 in the fair value hierarchy as they are traded in active markets which have identical assets. The carrying amounts of these instruments, the majority of which are in non-U.S. bank accounts, approximate their fair value. The Company’s derivative instruments represent foreign exchange rate forward contracts, which are valued using bank quotations based on market observable inputs such as forward and spot rates and are therefore classified as Level 2 in the fair value hierarchy. The impact of the credit risk related to these financial assets is immaterial. The fair values of the Company’s financial and non-financial assets and liabilities subject to such standards at September 30, 2017 and December 31, 2016 are as follows: Fair Value Measurements Quoted Prices in Significant Significant Active Markets Observable Unobservable for Identical Inputs Inputs Total Assets (Level 1) (Level 2) (Level 3) September 30, 2017: Short-term investments $ 37.4 $ 37.4 $ — $ — Forward contracts 2.5 — 2.5 — Total $ 39.9 $ 37.4 $ 2.5 $ — December 31, 2016: Short-term investments $ 138.6 $ 138.6 $ — $ — Forward contracts 8.4 — 8.4 — Total $ 147.0 $ 138.6 $ 8.4 $ — The Company does not have any significant financial or non-financial assets and liabilities that are measured at fair value on a non-recurring basis. The amount recognized in Accumulated other comprehensive income (loss) associated with foreign exchange rate forward contracts and the amount reclassified from Accumulated other comprehensive income (loss) to foreign exchange gain (loss) in the accompanying Condensed Consolidated Statements of Income during the three and nine months ended September 30, 2017 and 2016 were not material. The fair values of the forward contracts are recorded within Other current assets, Intangibles, net and other long-term assets, Other accrued expenses or Other long-term liabilities in the accompanying Condensed Consolidated Balance Sheets, depending on their value and remaining contractual period.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2017
Income Taxes
Income Taxes	Note 15—Income Taxes Three Months Ended Nine Months Ended September 30, September 30, 2017 2016 2017 2016 Provision for income taxes $ (78.1) $ (83.4) $ (212.7) $ (222.6) Effective tax rate % % % % As a result of the adoption of the new stock-based compensation standard (ASU 2016-09), stock option exercise activity had the impact of lowering our effective tax rate by approximately 470 basis points for both the third quarter and first nine months of 2017. The adoption of ASU 2016-09 was applied prospectively and therefore, there was no such impact to the provision for income taxes for the third quarter and first nine months of 2016. Refer to Note 2 herein for further information regarding the impact associated with the adoption of this new accounting standard. Acquisition-related expenses had the impact of increasing the effective tax rate for the third quarter and the first nine months of 2016 by approximately 40 basis points and 70 basis points, respectively. The Company operates in the U.S. and numerous foreign taxable jurisdictions, and at any point in time has numerous audits underway at various stages of completion. With few exceptions, the Company is subject to income tax examinations by tax authorities for the years 2013 and after. The Company is generally not able to precisely estimate the ultimate settlement amounts or timing until the close of an audit. The Company evaluates its tax positions and establishes liabilities for uncertain tax positions that may be challenged by tax authorities and may not be fully sustained, despite the Company’s belief that the underlying tax positions are fully supportable. As of September 30, 2017, the amount of the liability for unrecognized tax benefits, including penalties and interest, which if recognized would impact the effective tax rate, was approximately $136.0, which is included in Other long-term liabilities in the accompanying Condensed Consolidated Balance Sheets. Unrecognized tax benefits are reviewed on an ongoing basis and are adjusted for changing facts and circumstances, including progress of tax audits and the closing of statutes of limitation. Based on information currently available, management anticipates that over the next twelve-month period, audit activity could be completed and statutes of limitation may close relating to existing unrecognized tax benefits of approximately $5.1.

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2017
Inventories
Schedule of Inventories	September 30, December 31, 2017 2016 Raw materials and supplies $ 384.5 $ 319.8 Work in process 366.8 313.4 Finished goods 346.9 295.7 $ 1,098.2 $ 928.9

Reportable Business Segments (T

Reportable Business Segments (Tables)	9 Months Ended
	Sep. 30, 2017
Reportable Business Segments
Schedule of segment reporting information by segment	Interconnect Products Cable Products Total Reportable and Assemblies and Solutions Business Segments Three Months Ended September 30: 2017 2016 2017 2016 2017 2016 Net sales: External $ 1,731.5 $ 1,543.2 $ 109.3 $ 92.7 $ 1,840.8 $ 1,635.9 Intersegment 2.7 1.5 10.9 8.7 13.6 10.2 Segment operating income 388.3 342.0 14.3 13.8 402.6 355.8 Nine Months Ended September 30: Net sales: External $ 4,754.3 $ 4,366.9 $ 313.1 $ 268.4 $ 5,067.4 $ 4,635.3 Intersegment 6.9 5.0 31.5 21.6 38.4 26.6 Segment operating income 1,060.8 932.2 44.0 38.6 1,104.8 970.8
Schedule of the reconciliation of segment operating income to consolidated income before income taxes	Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Segment operating income $ 402.6 $ 355.8 $ 1,104.8 $ 970.8 Interest expense (24.6) (18.1) (67.3) (54.2) Other income, net 5.1 2.3 12.9 5.0 Stock-based compensation expense (12.6) (12.2) (37.1) (35.5) Acquisition-related expenses — (6.3) (4.0) (36.6) Other operating expenses (12.1) (11.0) (35.5) (32.6) Income before income taxes $ 358.4 $ 310.5 $ 973.8 $ 816.9

Changes in Equity and Noncont25

Changes in Equity and Noncontrolling Interests (Tables)	9 Months Ended
	Sep. 30, 2017
Equity
Rollforward of consolidated changes in equity	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 A rollforward of consolidated changes in equity for the nine months ended September 30, 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 587.5 6.8 594.3 Other comprehensive income (loss) 52.2 (0.6) 51.6 Acquisitions resulting in noncontrolling interest 6.4 6.4 Distributions to shareholders of noncontrolling interests (5.8) (5.8) Purchase of treasury stock (229.6) (229.6) Retirement of treasury stock (4.0) (229.6) 229.6 — Stock options exercised, including tax benefit 4.7 153.4 153.4 Dividends declared (129.5) (129.5) Stock-based compensation expense 35.5 35.5 Balance as of September 30, 2016 308.7 $ 0.3 $ 972.2 $ 3,032.8 $ (297.3) $ — $ 46.7 $ 3,754.7

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share
Schedule of the reconciliation of basic weighted average common shares outstanding to diluted weighted average common shares outstanding	Three Months Ended September 30, Nine Months Ended September 30, (dollars and shares in millions, except per share data) 2017 2016 2017 2016 Net income attributable to Amphenol Corporation shareholders $ 277.5 $ 224.3 $ 753.9 $ 587.5 Basic weighted average common shares outstanding 305.0 305.8 Effect of dilutive stock options 10.7 10.3 Diluted weighted average common shares outstanding 315.7 316.1 Earnings per share attributable to Amphenol Corporation shareholders: Basic $ 0.91 $ 0.73 $ 2.47 $ 1.91 Diluted $ 0.88 $ 0.71 $ 2.39 $ 1.86

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2017
Stock-Based Compensation
Schedule of stock option activity	Weighted Average Aggregate Weighted Remaining Intrinsic Average Contractual Value Options Exercise Price Term (in years) (in millions) Options outstanding at January 1, 2017 32,266,391 $ 44.14 7.03 $ 744.1 Options granted — Options exercised (834,925) Options forfeited (45,660) Options outstanding at March 31, 2017 31,385,806 44.54 6.85 835.7 Options granted 6,886,600 Options exercised (1,759,976) Options forfeited (70,160) Options outstanding at June 30, 2017 36,442,270 50.65 7.33 844.3 Options granted 143,000 Options exercised (1,757,971) Options forfeited (27,400) Options outstanding at September 30, 2017 34,799,899 $ 51.56 7.20 $ 1,151.2 Vested and non-vested options expected to vest at September 30, 2017 32,626,495 $ 50.85 7.11 $ 1,102.3 Exercisable options at September 30, 2017 15,026,939 $ 38.97 5.58 $ 686.2
Summary of status of non-vested options and changes during the year	Weighted Average Fair Value at Grant Options Date Non-vested options at January 1, 2017 18,725,570 $ 7.99 Options granted — — Options vested (82,740) 8.17 Options forfeited (45,660) 7.84 Non-vested options at March 31, 2017 18,597,170 7.98 Options granted 6,886,600 8.77 Options vested (5,668,910) 7.91 Options forfeited (70,160) 8.20 Non-vested options at June 30, 2017 19,744,700 8.28 Options granted 143,000 9.33 Options vested (87,340) 8.07 Options forfeited (27,400) 7.94 Non-vested options at September 30, 2017 19,772,960 $ 8.29
Summary of activity in the option plans	Three Months Ended Nine Months Ended September 30, September 30, 2017 2016 2017 2016 Total intrinsic value of stock options exercised $ 77.0 $ 72.7 $ 191.1 $ 155.3 Total fair value of stock options vested 0.7 0.6 46.2 43.0
Schedule of restricted share activity	Weighted Average Remaining Restricted Fair Value at Amortization Term Shares Grant Date (in years) Restricted shares outstanding at January 1, 2017 16,905 $ 57.99 0.38 Restricted shares granted — — Restricted shares outstanding at March 31, 2017 16,905 57.99 0.13 Shares vested and issued (16,905) 57.99 Restricted shares granted 11,526 72.90 Restricted shares outstanding at June 30, 2017 11,526 72.90 0.89 Restricted shares granted 1,379 76.13 Restricted shares outstanding at September 30, 2017 12,905 $ 73.25 0.65

Benefit Plans and Other Postr28

Benefit Plans and Other Postretirement Benefits (Tables)	9 Months Ended
	Sep. 30, 2017
Benefit Plans and Other Postretirement Benefits
Schedule of components of net pension expense	Other Postretirement Pension Benefits Benefits Three Months Ended September 30: 2017 2016 2017 2016 Service cost $ 2.5 $ 2.3 $ — $ — Interest cost 5.0 5.2 0.1 0.1 Expected return on plan assets (7.8) (7.6) — — Amortization of prior service cost 0.7 0.6 — — Amortization of net actuarial losses 5.8 5.6 0.2 0.2 Net pension expense $ 6.2 $ 6.1 $ 0.3 $ 0.3 Nine Months Ended September 30: Service cost $ 7.3 $ 6.9 $ — $ 0.1 Interest cost 14.9 15.8 0.3 0.3 Expected return on plan assets (23.2) (22.7) — — Amortization of transition obligation — (0.1) — — Amortization of prior service cost 2.1 1.7 — — Amortization of net actuarial losses 17.2 16.7 0.5 0.5 Net pension expense $ 18.3 $ 18.3 $ 0.8 $ 0.9

Goodwill and Other Intangible29

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2017
Goodwill and Other Intangible Assets
Schedule of changes in the carrying amount of goodwill by segment	Interconnect Cable Products and Products and Assemblies Solutions Total Goodwill at December 31, 2016 $ 3,532.5 $ 146.3 $ 3,678.8 Acquisition-related 192.7 — 192.7 Foreign currency translation 97.8 — 97.8 Goodwill at September 30, 2017 $ 3,823.0 $ 146.3 $ 3,969.3
Summary of the Company's amortizable intangible assets	September 30, 2017 December 31, 2016 Gross Net Gross Net Carrying Accumulated Carrying Carrying Accumulated Carrying Amount Amortization Amount Amount Amortization Amount Customer relationships $ 390.2 $ 188.9 $ 201.3 $ 381.1 $ 159.1 $ 222.0 Proprietary technology 107.5 48.5 59.0 106.7 40.9 65.8 Backlog and other 34.0 33.6 0.4 34.0 33.5 0.5 Total $ 531.7 $ 271.0 $ 260.7 $ 521.8 $ 233.5 $ 288.3

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2017
Debt
Schedule of Debt	September 30, 2017 December 31, 2016 Carrying Approximate Carrying Approximate Amount Fair Value Amount Fair Value Revolving Credit Facility $ — $ — $ — $ — Commercial Paper Program 1,191.9 1,191.9 1,018.9 1,018.9 1.55% Senior Notes due September 2017 — — 374.9 375.4 2.55% Senior Notes due January 2019 749.7 756.1 749.5 758.3 2.20% Senior Notes due April 2020 399.7 400.6 — — 3.125% Senior Notes due September 2021 374.8 383.5 374.8 380.4 4.00% Senior Notes due February 2022 499.5 527.7 499.4 523.7 3.20% Senior Notes due April 2024 349.6 354.1 — — Notes payable to foreign banks and other debt 9.6 9.6 5.5 5.5 Less deferred debt issuance costs (14.0) — (12.3) — Total debt 3,560.8 3,623.5 3,010.7 3,062.2 Less current portion 1.1 1.1 375.2 375.7 Total long-term debt $ 3,559.7 $ 3,622.4 $ 2,635.5 $ 2,686.5

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Measurements
Fair values of financial and non-financial assets and liabilities	Fair Value Measurements Quoted Prices in Significant Significant Active Markets Observable Unobservable for Identical Inputs Inputs Total Assets (Level 1) (Level 2) (Level 3) September 30, 2017: Short-term investments $ 37.4 $ 37.4 $ — $ — Forward contracts 2.5 — 2.5 — Total $ 39.9 $ 37.4 $ 2.5 $ — December 31, 2016: Short-term investments $ 138.6 $ 138.6 $ — $ — Forward contracts 8.4 — 8.4 — Total $ 147.0 $ 138.6 $ 8.4 $ —

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2017
Income Taxes
Schedule of provision for income taxes and effective tax rate	Three Months Ended Nine Months Ended September 30, September 30, 2017 2016 2017 2016 Provision for income taxes $ (78.1) $ (83.4) $ (212.7) $ (222.6) Effective tax rate % % % %

New Accounting Pronouncements (

New Accounting Pronouncements (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Jan. 01, 2017
New Accounting Pronouncements
Income tax expense (benefit)	$ 78.1	$ 83.4	$ 212.7	$ 222.6
Impact of ASU 2016-09
New Accounting Pronouncements
Income tax expense (benefit)	$ (16.6)		$ (45.8)
Increase in diluted earnings per share (in dollars per share)	$ 0.05		$ 0.14
Cumulative-effect adjustment to retained earnings					$ 0

Inventories (Details)

Inventories (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Inventories
Raw materials and supplies	$ 384.5	$ 319.8
Work in process	366.8	313.4
Finished goods	346.9	295.7
Inventories	$ 1,098.2	$ 928.9

Reportable Business Segments (D

Reportable Business Segments (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2017USD ($)segment	Sep. 30, 2016USD ($)
Segment reporting information
Number of reportable business segments | segment			2
Net sales	$ 1,840.8	$ 1,635.9	$ 5,067.4	$ 4,635.3
Segment operating income	377.9	326.3	1,028.2	866.1
Operating Segment
Segment reporting information
Segment operating income	402.6	355.8	1,104.8	970.8
Operating Segment | Interconnect Products and Assemblies
Segment reporting information
Net sales	1,731.5	1,543.2	4,754.3	4,366.9
Segment operating income	388.3	342	1,060.8	932.2
Operating Segment | Cable Products and Solutions
Segment reporting information
Net sales	109.3	92.7	313.1	268.4
Segment operating income	14.3	13.8	44	38.6
Inter-Segment
Segment reporting information
Net sales	13.6	10.2	38.4	26.6
Inter-Segment | Interconnect Products and Assemblies
Segment reporting information
Net sales	2.7	1.5	6.9	5
Inter-Segment | Cable Products and Solutions
Segment reporting information
Net sales	$ 10.9	$ 8.7	$ 31.5	$ 21.6

Reportable Business Segments, R

Reportable Business Segments, Reconciliation of Segment Operating Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reconciliation of segment operating income to consolidated income before income taxes
Segment operating income	$ 377.9	$ 326.3	$ 1,028.2	$ 866.1
Interest expense	(24.6)	(18.1)	(67.3)	(54.2)
Other income, net	5.1	2.3	12.9	5
Stock-based compensation expense	(12.6)	(12.2)	(37.1)	(35.5)
Acquisition-related expenses		(6.3)	(4)	(36.6)
Other operating expenses	(12.1)	(11)	(35.5)	(32.6)
Income before income taxes	358.4	310.5	973.8	816.9
Operating Segment
Reconciliation of segment operating income to consolidated income before income taxes
Segment operating income	$ 402.6	$ 355.8	$ 1,104.8	$ 970.8

Changes in Equity and Noncont37

Changes in Equity and Noncontrolling Interests (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Increase (Decrease) In Shareholders' Equity
Balance at beginning of period			$ 3,723.1	$ 3,278.4
Net income	$ 280.3	$ 227.1	761.1	594.3
Other comprehensive income (loss)	55.7	31.3	184.9	51.6
Acquisition resulting in noncontrolling interest			1.2	6.4
Purchase of noncontrolling interest			(15)
Distributions to shareholders of noncontrolling interests			(7.1)	(5.8)
Purchase of treasury stock			(555.6)	(229.6)
Stock options exercised			135.3	153.4
Dividends declared	(57.9)	(43.2)	(155.7)	(129.5)
Stock-based compensation expense			37.1	35.5
Balance at end of period	$ 4,109.3	$ 3,754.7	$ 4,109.3	$ 3,754.7
Common Stock
Increase (Decrease) In Shareholders' Equity
Balance (in shares)			308.3	308
Balance at beginning of period			$ 0.3	$ 0.3
Retirement of treasury stock (in shares)			(7.7)	(4)
Stock options exercised (in shares)			4.4	4.7
Balance (in shares)	305	308.7	305	308.7
Balance at end of period	$ 0.3	$ 0.3	$ 0.3	$ 0.3
Additional Paid-In Capital
Increase (Decrease) In Shareholders' Equity
Balance at beginning of period			1,020.9	783.3
Purchase of noncontrolling interest			(5.5)
Stock options exercised			135.3	153.4
Stock-based compensation expense			37.1	35.5
Balance at end of period	1,187.8	972.2	1,187.8	972.2
Retained Earnings
Increase (Decrease) In Shareholders' Equity
Balance at beginning of period			3,122.7	2,804.4
Net income			753.9	587.5
Retirement of treasury stock			(555.6)	(229.6)
Dividends declared			(155.7)	(129.5)
Balance at end of period	3,165.3	3,032.8	3,165.3	3,032.8
Accumulated Other Comprehensive Loss
Increase (Decrease) In Shareholders' Equity
Balance at beginning of period			(469)	(349.5)
Other comprehensive income (loss)			182.8	52.2
Balance at end of period	(286.2)	(297.3)	(286.2)	(297.3)
Treasury Stock
Increase (Decrease) In Shareholders' Equity
Purchase of treasury stock			(555.6)	(229.6)
Retirement of treasury stock			555.6	229.6
Noncontrolling Interests
Increase (Decrease) In Shareholders' Equity
Balance at beginning of period			48.2	39.9
Net income			7.2	6.8
Other comprehensive income (loss)			2.1	(0.6)
Acquisition resulting in noncontrolling interest			1.2	6.4
Purchase of noncontrolling interest			(9.5)
Distributions to shareholders of noncontrolling interests			(7.1)	(5.8)
Balance at end of period	$ 42.1	$ 46.7	$ 42.1	$ 46.7

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share
Net income attributable to Amphenol Corporation shareholders	$ 277.5	$ 224.3	$ 753.9	$ 587.5
Basic weighted average common shares outstanding (in shares)	305	308.9	305.8	308.3
Effect of dilutive stock options (in shares)	10.7	6.8	10.3	6.8
Diluted weighted average common shares outstanding (in shares)	315.7	315.7	316.1	315.1
Earnings per share attributable to Amphenol Corporation shareholders:
Basic (in dollars per share)	$ 0.91	$ 0.73	$ 2.47	$ 1.91
Diluted (in dollars per share)	$ 0.88	$ 0.71	$ 2.39	$ 1.86
Anti-dilutive common shares
Anti-dilutive stock options, excluded from the computations of earning per share (in shares)	5.3	13.2	2.1	11

Earnings Per Share, ASU 2016-09

Earnings Per Share, ASU 2016-09 (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Effect of dilutive stock options
Effect of dilutive stock options (in shares)	10.7	6.8	10.3	6.8
Impact of ASU 2016-09
Effect of dilutive stock options
Effect of dilutive stock options (in shares)	2		2

Stock-Based Compensation, Stock

Stock-Based Compensation, Stock-based Comp Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Stock-Based Compensation
Expense incurred for stock-based compensation plans	$ 12.6	$ 12.2	$ 37.1	$ 35.5
Recognized tax benefit related to stock-based compensation	$ 19.5	$ 2.9	$ 54.7	$ 8.5

Stock-Based Compensation, Optio

Stock-Based Compensation, Options and Restricted Shares (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
2000 Employee Option Plan
Stock-Based Compensation
Number of additional stock options that will be granted (in shares)					0
Options exercisable period					10 years
2009 Employee Option Plan
Stock-Based Compensation
Number of additional stock options that will be granted (in shares)					0
Options ratable vesting period					5 years
Options exercisable period					10 years
2017 Employee Option Plan
Stock-Based Compensation
Common Stock reserved for issuance	30,000,000				30,000,000
Shares available for the granting of additional stock options	22,970,400				22,970,400
Options ratable vesting period					5 years
Options exercisable period					10 years
2004 Directors Option Plan
Stock-Based Compensation
Shares available for the granting of additional stock options	140,000				140,000
Number of additional stock options expected to be granted (in shares)	0				0
Options exercisable period					10 years
Stock Options
Stock option activity
Options outstanding at the beginning of the period (in shares)	36,442,270	31,385,806	32,266,391		32,266,391
Options granted (in shares)	143,000	6,886,600
Options exercised (in shares)	(1,757,971)	(1,759,976)	(834,925)
Options forfeited (in shares)	(27,400)	(70,160)	(45,660)
Options outstanding at the end of the period (in shares)	34,799,899	36,442,270	31,385,806		34,799,899		32,266,391
Vested and non-vested options expected to vest at the end of the period (in shares)	32,626,495				32,626,495
Exercisable at the end of the period (in shares)	15,026,939				15,026,939
Weighted Average Exercise Price
Weighted average exercise price, options outstanding at the beginning of the period (in dollars per share)	$ 50.65	$ 44.54	$ 44.14		$ 44.14
Weighted average exercise price, options outstanding at the end of the period (in dollars per share)	51.56	$ 50.65	$ 44.54		51.56		$ 44.14
Weighted average exercise price, vested and non-vested options expected to vest (in dollars per share)	50.85				50.85
Weighted average exercise price, exercisable (in dollars per share)	$ 38.97				$ 38.97
Weighted Average Remaining Contractual Term
Weighted average remaining contractual term of options outstanding	7 years 2 months 12 days	7 years 3 months 29 days	6 years 10 months 6 days				7 years 11 days
Weighted average remaining contractual term of options vested options and non-vested expected to vest					7 years 1 month 10 days
Weighted average remaining contractual term of options exercisable					5 years 6 months 29 days
Aggregate Intrinsic Value
Aggregate intrinsic value of options outstanding	$ 1,151.2	$ 844.3	$ 835.7		$ 1,151.2		$ 744.1
Aggregate intrinsic value of options, vested and non-vested options expected to vest	1,102.3				1,102.3
Aggregate intrinsic value of options exercisable	$ 686.2				$ 686.2
Status of the Company's non-vested options and changes during the year
Non-vested options at the beginning of the period (in shares)	19,744,700	18,597,170	18,725,570		18,725,570
Options granted (in shares)	143,000	6,886,600
Non-vested options, options vested (in shares)	(87,340)	(5,668,910)	(82,740)
Non-vested options, options forfeited (in shares)	(27,400)	(70,160)	(45,660)
Non-vested options at the end of the period (in shares)	19,772,960	19,744,700	18,597,170		19,772,960		18,725,570
Weighted Average Fair Value at Grant Date
Weighted average fair value at the grant date, options outstanding at the beginning of the period (in dollars per share)	$ 8.28	$ 7.98	$ 7.99		$ 7.99
Weighted average fair value at grant date, options granted (in dollars per share)	9.33	8.77
Weighted average fair value at grant date, options vested (in dollars per share)	8.07	7.91	8.17
Weighted average fair value at grant date, options forfeited (in dollars per share)	7.94	8.20	7.84
Weighted average fair value at the grant date, options outstanding at the end of the period (in dollars per share)	$ 8.29	$ 8.28	$ 7.98		$ 8.29		$ 7.99
Fair Value at Grant Date
Total intrinsic value of stock options exercised	$ 77			$ 72.7	$ 191.1	$ 155.3
Total fair value of stock options vested	0.7			$ 0.6	46.2	$ 43
Total compensation cost related to non-vested options not yet recognized	$ 132.6				$ 132.6
Weighted average expected amortization period					3 years 5 months 23 days
Restricted Shares | 2012 Directors Restricted Stock Plan
Stock-Based Compensation
Shares available for the granting of additional stock options	124,164				124,164
Restricted share activity
Restricted shares outstanding at the beginning of the period (in shares)	11,526	16,905	16,905		16,905
Restricted shares granted (in shares)	1,379	11,526
Shares vested and issued (in shares)		(16,905)
Restricted shares outstanding at the end of the period (in shares)	12,905	11,526	16,905		12,905		16,905
Fair Value at Grant Date
Fair value at the grant date, restricted shares outstanding at the beginning of the period (in dollars per share)	$ 72.90	$ 57.99	$ 57.99		$ 57.99
Fair value of restricted shares vested and issued (in dollar per share)		57.99
Fair value of restricted shares granted (in dollars per share)	76.13	72.90
Fair value at the grant date, restricted shares outstanding at the end of the period (in dollars per share)	$ 73.25	$ 72.90	$ 57.99		$ 73.25		$ 57.99
Weighted Average Remaining Amortization Term (in years)	7 months 24 days	10 months 21 days	1 month 17 days				4 months 17 days
Total compensation cost related to non-vested restricted shares not yet recognized	$ 0.6				$ 0.6
Weighted average expected amortization period					7 months 24 days

Shareholders' Equity, Stock Rep

Shareholders' Equity, Stock Repurchase (Details) - 2017 Stock Repurchase Program - USD ($) $ in Millions	Jan. 24, 2017	Oct. 31, 2017	Sep. 30, 2017
Shareholders' Equity
Value of shares authorized to be repurchased	$ 1,000
Repurchase of stock program, period	2 years
Number of shares repurchased and retired			7,700,000
Payments for shares repurchased and retired (in dollars)			$ 555.6
Value of shares remaining that may be repurchased under the stock repurchase program		$ 444.4
Number of shares repurchased		0

Shareholders' Equity, Dividends

Shareholders' Equity, Dividends (Details) - USD ($) $ / shares in Units, $ in Millions	Sep. 30, 2016	Jul. 31, 2017	Oct. 31, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Shareholders’ Equity
Dividends declared per common share (in dollars per share)	$ 0.14	$ 0.19	$ 0.16	$ 0.19	$ 0.14	$ 0.51	$ 0.42
Dividends paid				$ 48.8	$ 43.1	$ 147.1	$ 129.4
Dividends declared				$ 57.9	$ 43.2	$ 155.7	$ 129.5

Benefit Plans and Other Postr44

Benefit Plans and Other Postretirement Benefits, Net pension expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Pension Benefits
Components of net pension expense:
Service cost	$ 2.5	$ 2.3	$ 7.3	$ 6.9
Interest cost	5	5.2	14.9	15.8
Expected return on plan assets	(7.8)	(7.6)	(23.2)	(22.7)
Amortization of transition obligation				(0.1)
Amortization of prior service cost	0.7	0.6	2.1	1.7
Amortization of net actuarial losses	5.8	5.6	17.2	16.7
Net pension expense	6.2	6.1	18.3	18.3
Estimated cash contribution to the Plans in 2017 based on current actuarial calculations	25		25
Pension Benefits | U.S. Plans
Components of net pension expense:
Plan contributions by employer			17
Other Postretirement Benefits
Components of net pension expense:
Service cost				0.1
Interest cost	0.1	0.1	0.3	0.3
Amortization of net actuarial losses	0.2	0.2	0.5	0.5
Net pension expense	$ 0.3	$ 0.3	$ 0.8	$ 0.9

Benefit Plans and Other Postr45

Benefit Plans and Other Postretirement Benefits, Defined Contribution (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Benefit Plans and Other Postretirement Benefits
Contributions to U.S. defined contribution plans by the Company, maximum percentage of eligible compensation	5.00%
Matching contributions to U.S. defined contribution plans by the Company	$ 5	$ 3.5

Acquisitions (Details)

Acquisitions (Details) - USD ($) $ in Millions	Jan. 08, 2016	Sep. 30, 2017	Sep. 30, 2016
Acquisitions
Purchase price, net of cash acquired		$ 243.5	$ 1,272.6
FCI Asia Pte Ltd (“FCI”)
Acquisitions
Purchase price, net of cash acquired	$ 1,178.6

Acquisitions, Acquisition-relat

Acquisitions, Acquisition-related Expenses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2017	Sep. 30, 2016
Acquisitions
Acquisition-related expenses	$ 6.3		$ 4	$ 36.6
Acquisition-related expenses, net of tax			$ 3.7
FCI Asia Pte Ltd (“FCI”)
Acquisitions
Acquisition-related expenses		$ 30.3
Acquisition-related expenses, net of tax		$ 27.3
Other
Acquisitions
Acquisition-related expenses	6.3
Acquisition-related expenses, net of tax	$ 5.8

Goodwill and Other Intangible48

Goodwill and Other Intangible Assets, Goodwill (Details) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2017USD ($)segment	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Goodwill.
Goodwill, Beginning Balance	$ 3,678.8
Acquisition-related	192.7
Foreign currency translation	97.8
Goodwill, Ending Balance	$ 3,969.3	$ 3,678.8
Number of reportable business segments | segment	2
Goodwill impairment	$ 0	0	$ 0
Interconnect Products and Assemblies
Goodwill.
Goodwill, Beginning Balance	3,532.5
Acquisition-related	192.7
Foreign currency translation	97.8
Goodwill, Ending Balance	3,823	3,532.5
Cable Products and Solutions
Goodwill.
Goodwill, Beginning Balance	146.3
Goodwill, Ending Balance	$ 146.3	$ 146.3

Goodwill and Other Intangible49

Goodwill and Other Intangible Assets, Intangible Assets (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Intangible assets
Indefinite-lived trade name intangible asset	$ 186.1	$ 186.1
Gross Carrying Amount	531.7	521.8
Accumulated Amortization	271	233.5
Net Carrying Amount	$ 260.7	288.3
Weighted average useful lives of acquired amortizable intangible assets	10 years
Customer relationships
Intangible assets
Gross Carrying Amount	$ 390.2	381.1
Accumulated Amortization	188.9	159.1
Net Carrying Amount	$ 201.3	222
Weighted average useful lives of acquired amortizable intangible assets	10 years
Proprietary technology
Intangible assets
Gross Carrying Amount	$ 107.5	106.7
Accumulated Amortization	48.5	40.9
Net Carrying Amount	$ 59	65.8
Weighted average useful lives of acquired amortizable intangible assets	11 years
Backlog and other
Intangible assets
Gross Carrying Amount	$ 34	34
Accumulated Amortization	33.6	33.5
Net Carrying Amount	$ 0.4	$ 0.5
Weighted average useful lives of acquired amortizable intangible assets	2 years

Goodwill and Other Intangible50

Goodwill and Other Intangible Assets, Amortization (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Intangible assets
Impairment of intangible assets			$ 0		$ 0	$ 0
Amortization expense	$ 12.3	$ 11.6	36.4	$ 42.8
Amortization expense estimated for each of the next five fiscal years
Remainder of 2017	12.3		12.3
2,018	45.2		45.2
2,019	41.3		41.3
2,020	35.9		35.9
2,021	30.4		30.4
2,022	$ 23.1		$ 23.1
Backlog
Intangible assets
Amortization expense				$ 8

Debt (Details)

Debt (Details) - USD ($) $ in Millions	Apr. 05, 2017	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Long-Term Debt
Less deferred debt issuance costs		$ (14)	$ (14)	$ (12.3)
Total debt		3,560.8	3,560.8	3,010.7
Less current portion		1.1	1.1	375.2
Total long-term debt		3,559.7	3,559.7	2,635.5
Total debt, Approximate Fair Value		3,623.5	3,623.5	3,062.2
Less short-term debt, Approximate Fair Value		1.1	1.1	375.7
Long-term debt, Approximate Fair Value		3,622.4	3,622.4	2,686.5
The “Revolving Credit Facility”
Long-Term Debt
Maximum borrowing capacity		2,000	2,000
Borrowings under the Revolving Credit Facility		0	0
Commercial Paper Program
Long-Term Debt
Debt carrying amount, net of unamortized discount before deferred debt issuance costs		1,191.9	1,191.9	1,018.9
Total debt, Approximate Fair Value		1,191.9	1,191.9	$ 1,018.9
Maximum borrowing capacity		$ 2,000	$ 2,000
Maximum maturity term			397 days
Average interest rate (as a percent)		1.48%	1.48%
Senior Notes
Long-Term Debt
Redemption price as a percentage of principal amount			100.00%
1.55% Senior Notes due September 2017
Long-Term Debt
Stated interest rate (as a percent)		1.55%	1.55%	1.55%
Debt carrying amount, net of unamortized discount before deferred debt issuance costs				$ 374.9
Total debt, Approximate Fair Value				$ 375.4
Repayment of debt		$ 375
2.55% Senior Notes due January 2019
Long-Term Debt
Stated interest rate (as a percent)		2.55%	2.55%	2.55%
Debt carrying amount, net of unamortized discount before deferred debt issuance costs		$ 749.7	$ 749.7	$ 749.5
Total debt, Approximate Fair Value		$ 756.1	$ 756.1	$ 758.3
2.20% Senior Notes due April 2020
Long-Term Debt
Stated interest rate (as a percent)	2.20%	2.20%	2.20%
Debt carrying amount, net of unamortized discount before deferred debt issuance costs		$ 399.7	$ 399.7
Total debt, Approximate Fair Value		$ 400.6	$ 400.6
Debt instrument, principal amount	$ 400
Debt instrument, face amount, net of discount (as a percent)	99.922%
Redemption price as a percentage of principal amount	100.00%
3.125% Senior Notes due September 2021
Long-Term Debt
Stated interest rate (as a percent)		3.125%	3.125%	3.125%
Debt carrying amount, net of unamortized discount before deferred debt issuance costs		$ 374.8	$ 374.8	$ 374.8
Total debt, Approximate Fair Value		$ 383.5	$ 383.5	$ 380.4
4.00% Senior Notes due February 2022
Long-Term Debt
Stated interest rate (as a percent)		4.00%	4.00%	4.00%
Debt carrying amount, net of unamortized discount before deferred debt issuance costs		$ 499.5	$ 499.5	$ 499.4
Total debt, Approximate Fair Value		$ 527.7	$ 527.7	523.7
3.20% Senior Notes due April 2024
Long-Term Debt
Stated interest rate (as a percent)	3.20%	3.20%	3.20%
Debt carrying amount, net of unamortized discount before deferred debt issuance costs		$ 349.6	$ 349.6
Total debt, Approximate Fair Value		354.1	354.1
Debt instrument, principal amount	$ 350
Debt instrument, face amount, net of discount (as a percent)	99.888%
Redemption price as a percentage of principal amount	100.00%
Notes payable to foreign banks and other debt
Long-Term Debt
Debt carrying amount, net of unamortized discount before deferred debt issuance costs		9.6	9.6	5.5
Total debt, Approximate Fair Value		9.6	9.6	$ 5.5
2.20% and 3.20% Senior Notes due April, 2020 and 2024, respectively
Long-Term Debt
Debt issuance costs incurred		$ 5.2	$ 5.2

Fair Value Measurements (Detail

Fair Value Measurements (Details) - Recurring basis - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Fair value of assets and liabilities measured on recurring basis
Short-term investments	$ 37.4	$ 138.6
Forward contracts	2.5	8.4
Total	39.9	147
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair value of assets and liabilities measured on recurring basis
Short-term investments	37.4	138.6
Total	37.4	138.6
Significant Observable Inputs (Level 2)
Fair value of assets and liabilities measured on recurring basis
Forward contracts	2.5	8.4
Total	$ 2.5	$ 8.4

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Taxes
Provision for income taxes	$ (78.1)	$ (83.4)	$ (212.7)	$ (222.6)
Effective tax rate (as a percent)	21.80%	26.90%	21.80%	27.20%
Impact of acquisition-related expenses on the effective tax rate (in basis points)		0.40%		0.70%
Liability for unrecognized tax benefits, including penalties and interest, which if recognized would impact the effective tax rate	$ 136		$ 136
Unrecognized tax benefits that could change in the next twelve-month period	5.1		5.1
Impact of ASU 2016-09
Income Taxes
Provision for income taxes	$ 16.6		$ 45.8
Impact of tax benefits due to accounting standard for stock-based compensation (in basis points)	4.70%		4.70%