10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

☒	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the quarterly period ended September 30, 2018 OR
☐	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from          to

Commission file number: 1-10879

AMPHENOL CORPORATION

(Exact name of registrant as specified in its charter)

Delaware	22-2785165
(State of Incorporation)	(IRS Employer Identification No.)

358 Hall Avenue

Wallingford, Connecticut 06492

(Address of principal executive offices) (Zip Code)

203-265-8900

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  Yes ☒  No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).  Yes ☒  No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer ☒	Accelerated filer ☐
Non-accelerated filer ☐	Smaller reporting company ☐
	Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  Yes ☐  No ☒

As of October 24, 2018, the total number of shares outstanding of the registrant’s Class A Common Stock was 301,327,138.

Amphenol Corporation

Index to Quarterly Report

on Form 10-Q

		Page
Part I	Financial Information
Item 1.	Financial Statements (unaudited)
	Condensed Consolidated Balance Sheets as of September 30, 2018 and December 31, 2017	2
	Condensed Consolidated Statements of Income for the Three and Nine Months Ended September 30, 2018 and 2017	3
	Condensed Consolidated Statements of Comprehensive Income for the Three and Nine Months Ended September 30, 2018 and 2017	4
	Condensed Consolidated Statements of Cash Flow for the Nine Months Ended September 30, 2018 and 2017	5
	Notes to Condensed Consolidated Financial Statements	6
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	24
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	34
Item 4.	Controls and Procedures	35
Part II	Other Information
Item 1.	Legal Proceedings	36
Item 1A.	Risk Factors	36
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	36
Item 3.	Defaults Upon Senior Securities	37
Item 4.	Mine Safety Disclosures	37
Item 5.	Other Information	37
Item 6.	Exhibits	37
Signature		39

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PART I — FINANCIAL INFORMATION

Item 1. Financial Statements

AMPHENOL CORPORATION

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

(dollars in millions)

	September 30,		December 31,
	2018		2017
Assets
Current Assets:
Cash and cash equivalents	$	998.3	$	1,719.1
Short-term investments		21.5		34.6
Total cash, cash equivalents and short-term investments		1,019.8		1,753.7
Accounts receivable, less allowance for doubtful accounts of $27.5 and $23.0, respectively		1,737.6		1,598.6
Inventories		1,245.5		1,106.9
Other current assets		278.6		196.8
Total current assets		4,281.5		4,656.0
Property, plant and equipment, less accumulated depreciation of $1,285.6 and $1,200.1, respectively		886.4		816.8
Goodwill		4,113.7		4,042.6
Intangibles, net and other long-term assets		461.0		488.5
	$	9,742.6	$	10,003.9
Liabilities & Equity
Current Liabilities:
Accounts payable	$	1,014.0	$	875.6
Accrued salaries, wages and employee benefits		161.1		151.6
Accrued income taxes		184.8		154.2
Accrued dividends		69.3		58.1
Other accrued expenses		323.8		338.8
Current portion of long-term debt		790.2		1.1
Total current liabilities		2,543.2		1,579.4
Long-term debt, less current portion		2,468.3		3,541.5
Accrued pension and postretirement benefit obligations		171.0		272.0
Deferred income taxes		203.1		241.2
Other long-term liabilities		303.7		326.4
Equity:
Common stock		0.3		0.3
Additional paid-in capital		1,410.1		1,249.0
Retained earnings		2,935.8		2,941.5
Accumulated other comprehensive loss		(337.3)		(201.0)
Total shareholders’ equity attributable to Amphenol Corporation		4,008.9		3,989.8
Noncontrolling interests		44.4		53.6
Total equity		4,053.3		4,043.4
	$	9,742.6	$	10,003.9

See accompanying notes to condensed consolidated financial statements.

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AMPHENOL CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(Unaudited)

(dollars and shares in millions, except per share data)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Net sales	$	2,129.0	$	1,840.8	$	5,977.3	$	5,067.4
Cost of sales		1,440.8		1,234.7		4,037.4		3,392.8
Gross profit		688.2		606.1		1,939.9		1,674.6
Acquisition-related expenses		—		—		—		4.0
Selling, general and administrative expenses		244.0		228.2		710.6		642.4
Operating income		444.2		377.9		1,229.3		1,028.2
Interest expense		(24.8)		(24.6)		(75.3)		(67.3)
Other income, net		0.2		5.1		2.5		12.9
Income before income taxes		419.6		358.4		1,156.5		973.8
Provision for income taxes		(100.0)		(78.1)		(280.8)		(212.7)
Net income		319.6		280.3		875.7		761.1
Less: Net income attributable to noncontrolling interests		(3.0)		(2.8)		(8.8)		(7.2)
Net income attributable to Amphenol Corporation	$	316.6	$	277.5	$	866.9	$	753.9
Net income per common share — Basic	$	1.05	$	0.91	$	2.87	$	2.47
Weighted average common shares outstanding — Basic		300.5		305.0		301.7		305.8
Net income per common share — Diluted	$	1.01	$	0.88	$	2.76	$	2.39
Weighted average common shares outstanding — Diluted		312.4		315.7		313.6		316.1
Dividends declared per common share	$	0.23	$	0.19	$	0.65	$	0.51

See accompanying notes to condensed consolidated financial statements.

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AMPHENOL CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

(dollars in millions)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Net income	$	319.6	$	280.3	$	875.7	$	761.1
Total other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments		(54.6)		52.1		(154.2)		172.4
Unrealized (loss) gain on cash flow hedges		(0.7)		(0.6)		0.3		—
Defined benefit plan adjustment, net of tax of ($1.6) and ($4.7) for 2018 and ($2.2) and ($6.7) for 2017, respectively		5.0		4.2		14.9		12.5
Total other comprehensive (loss) income, net of tax		(50.3)		55.7		(139.0)		184.9
Total comprehensive income		269.3		336.0		736.7		946.0
Less: Comprehensive income attributable to noncontrolling interests		(1.4)		(3.6)		(6.1)		(9.3)
Comprehensive income attributable to Amphenol Corporation	$	267.9	$	332.4	$	730.6	$	936.7

See accompanying notes to condensed consolidated financial statements.

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AMPHENOL CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOW

(Unaudited)

(dollars in millions)

	Nine Months Ended September 30,
	2018		2017
Cash from operating activities:
Net income	$	875.7	$	761.1
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization		194.5		168.5
Stock-based compensation expense		40.4		37.1
Deferred income tax benefit		(41.5)		(0.6)
Net change in components of working capital		(246.4)		(252.8)
Net change in accrued pension and postretirement benefits		(77.0)		(0.7)
Net change in other long-term assets and liabilities		(11.2)		3.8
Net cash provided by operating activities		734.5		716.4
Cash from investing activities:
Capital expenditures		(208.2)		(155.8)
Proceeds from disposals of property, plant and equipment		3.8		2.0
Purchases of short-term investments		(35.3)		(36.1)
Sales and maturities of short-term investments		48.3		140.4
Acquisitions, net of cash acquired		(158.9)		(243.5)
Net cash used in investing activities		(350.3)		(293.0)
Cash from financing activities:
Proceeds from issuance of senior notes, net		—		749.3
Repayments of long-term debt		(8.7)		(375.0)
(Repayments) borrowings under commercial paper programs, net		(300.1)		173.6
Payment of costs related to debt financing		(0.3)		(5.2)
Proceeds from exercise of stock options		123.0		134.4
Distributions to and purchases of noncontrolling interests		(17.9)		(22.1)
Purchase and retirement of treasury stock		(680.2)		(555.6)
Dividend payments		(184.4)		(147.1)
Net cash used in financing activities		(1,068.6)		(47.7)
Effect of exchange rate changes on cash and cash equivalents		(36.4)		41.9
Net change in cash and cash equivalents		(720.8)		417.6
Cash and cash equivalents balance, beginning of period		1,719.1		1,034.6
Cash and cash equivalents balance, end of period	$	998.3	$	1,452.2
Cash paid for:
Interest	$	79.5	$	78.0
Income taxes		307.7		244.1

See accompanying notes to condensed consolidated financial statements.

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AMPHENOL CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

(amounts in millions, except share and per share data)

Note 1—Basis of Presentation and Principles of Consolidation

The condensed consolidated balance sheets as of September 30, 2018 and December 31, 2017, the related condensed consolidated statements of income and condensed consolidated statements of comprehensive income for the three and nine months ended September 30, 2018 and 2017, and the related condensed consolidated statements of cash flow for the nine months ended September 30, 2018 and 2017 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, 2018 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, 2017 (the “2017 Annual Report”). 

Deferred income tax benefit and Net change in accrued pension and postretirement benefits have been presented as separate line items within cash from operating activities for the prior period in the Company’s Condensed Consolidated Statements of Cash Flow, in order to conform to the current period presentation, which had no impact on our consolidated results of operations, financial position or cash flows.

Note 2—New Accounting Pronouncements

Recently Adopted Accounting Standards

Revenue Recognition

In May 2014, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”, and collectively with its related subsequent amendments, “Topic 606”).  Topic 606 supersedes previous revenue recognition guidance and requires entities to 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.  The Company adopted Topic 606 as of January 1, 2018 using the modified retrospective transition method applied to those contracts which were not completed as of January 1, 2018.  Under this transition method, the Company’s results in the Condensed Consolidated Statements of Income for the three and nine months ended September 30, 2018 are presented under Topic 606, while the comparative results for the three and nine months ended September 30, 2017 were not retrospectively adjusted, as such results were recognized in accordance with the revenue recognition policy discussed under Summary of Significant Accounting Policies in Note 1 of the Company’s 2017 Annual Report.

The vast majority of our sales continue to be recognized when products are shipped from our facilities or delivered to our customers, depending on the respective contractual terms.  For a nominal portion of our contracts where the accounting did change, the adoption of Topic 606 resulted in an increase to the opening balance of retained earnings of approximately $3.2 as of January 1, 2018.  This impact was primarily due to the acceleration of net sales and associated net income related to certain uncompleted contracts for the manufacture of goods with no alternative use and for which we have an enforceable right to payment, including a reasonable profit margin, from the customer for performance completed to date.  For these contracts, we now recognize revenue over time as control of the goods transfers, rather than when the goods are delivered, and title, risk and reward of ownership are passed to the customer, as under previous guidance. 

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The adoption of Topic 606 did not have a material impact on our condensed consolidated financial statements as of the adoption date and as of and for the three and nine months ended September 30, 2018.  Refer to Note 3 herein for further discussion regarding revenue recognition and related policies.

Other Recently Adopted Accounting Standards

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 requiring other pension-related costs, such as interest costs, amortization of pension-related costs from prior periods, and the gains or losses on plan assets, to 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.  The Company adopted ASU 2017‑07 in the first quarter of 2018, which did not have a material impact on our consolidated financial statements.

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 adopted ASU 2017‑09 in the first quarter of 2018, which did not have any impact on our consolidated financial statements.

In March 2018, the FASB issued ASU 2018‑05, Income Taxes (Topic 740): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 (“ASU 2018-05”), which addresses the application of U.S. GAAP when preparing the initial accounting for the income tax effects of a change in tax laws or rates.  SEC Staff Accounting Bulletin No. 118 (“SAB 118”) was issued in December 2017 to provide immediate accounting guidance resulting from the enactment of the Tax Cuts and Jobs Act (“Tax Act”) on December 22, 2017.  ASU 2018-05 codifies the guidance of SAB 118 within FASB ASC Topic 740, Income Taxes (“ASC 740”), including guidance allowing for the recognition of provisional amounts in situations where the related accounting is not complete and reasonable estimates can be made at the time that financial statements are issued covering the reporting period that includes the enactment date of the Tax Act, as well as allowing for a measurement period of up to one year from the enactment date to finalize the accounting related to the Tax Act.  Previously, ASC 740 did not directly address incomplete accounting for the effects of a change in tax laws or rates.  The Company followed the guidance under SAB 118 in the fourth quarter of 2017 when the provisional income tax charge (“Tax Act Charge”) associated with the Tax Act was estimated and recorded.  Refer to Note 14 herein for further details regarding the Tax Act.

Accounting Standards Issued But Not Yet Adopted

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-of-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 not recognize a right-of-use asset nor lease liability, but rather to recognize such leases as lease expense, generally on a straight-line basis over the lease term.  In July 2018, the FASB issued ASU 2018-10, Codification Improvements to Topic 842, Leases, which clarified various aspects of the guidance under ASU 2016-02.  ASU 2016‑02 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, with early adoption permitted.  Originally, entities were required to adopt ASU 2016-02 using a modified retrospective approach, which required prior periods to be presented under this new standard.  However, in July 2018, the FASB issued ASU 2018-11,  Leases (Topic 842): Targeted Improvements, which now allows entities the option of recognizing the cumulative effect of applying the new standard as an adjustment to the opening balance of retained earnings in the year of adoption while continuing to present all prior periods under previous lease accounting guidance.  The Company has implemented a new lease management system that will facilitate the adoption of this new standard and ensure all requirements are met for both reporting and

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disclosure purposes, while we continue to review and implement the necessary changes to our existing policies, processes and controls to ensure compliance.  While the Company continues to evaluate the impact that ASU 2016-02 will have on our consolidated financial statements and related disclosures, the actual impact of the standard will be dependent upon the Company’s lease portfolio at adoption.  ASU 2016-02 also provides various optional practical expedients in transition, which we continue to evaluate.  The Company will adopt ASU 2016-02 in the first quarter of 2019 using the modified retrospective transition approach allowed under ASU 2018-11, and will recognize the cumulative effect of applying the new standard as an adjustment to the opening balance of retained earnings as of January 1, 2019.  Upon adoption, we will recognize a right-of-use asset and a corresponding lease liability for our operating lease commitments on our balance sheet, and will also provide new disclosures about our leasing activities.

In February 2018, the FASB issued ASU 2018-02, Income Statement—Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income (“ASU 2018-02”), which amends the standard on comprehensive income by providing an option for an entity to reclassify stranded tax effects of the Tax Act from accumulated other comprehensive income directly to retained earnings.  The stranded tax effects result from the remeasurement of net deferred tax positions that were originally recorded in comprehensive income but whose remeasurement was reflected in the income statement in 2017.  ASU 2018-02 only applies to the effects of the Tax Act and is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, with early adoption permitted.  ASU 2018-02 may be applied either at the beginning of the period of adoption or on a retrospective basis to any period in which the impacts of the Tax Act are recognized.  The comparative prior periods will not be restated and will continue to be reported under the accounting standards in effect for those periods.  The adoption of ASU 2018-02 will result in the reclassification of the stranded tax effects of the Tax Act from Accumulated other comprehensive loss to Retained earnings on the consolidated balance sheet.  The Company plans to early adopt ASU 2018-02 in the fourth quarter of 2018, as of October 1, 2018, which will not have a material impact on our consolidated financial statements.

In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820):  Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”), which adds, amends and removes certain disclosure requirements related to fair value measurements.  Among other changes, this standard requires certain additional disclosure surrounding Level 3 assets, including changes in unrealized gains or losses in other comprehensive income and certain inputs in those measurements.  ASU 2018-13 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019.  Certain amended or eliminated disclosures in this standard may be adopted early, while certain additional disclosure requirements in this standard can be adopted on its effective date.  In addition, certain changes in the standard require retrospective adoption, while other changes must be adopted prospectively.  The Company is currently evaluating ASU 2018-13 and its impact on our consolidated financial statements.

In August 2018, the FASB issued ASU 2018-14, Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20):  Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans (“ASU 2018-14”), which amends the current annual disclosure requirements related to defined benefit pension and other postretirement plans by adding new requirements, removing certain requirements and providing clarification on existing requirements.  ASU 2018-14 does not amend the interim disclosure requirements of existing guidance and is effective for fiscal years ending after December 31, 2020, with early adoption permitted and must be applied on a retrospective basis.  The Company is currently evaluating ASU 2018-14 and its impact on our consolidated financial statements.

The Securities and Exchange Commission has also recently issued several final rules, including but not limited to SEC Final Rule Release No. 33-10532 Disclosure Update and Simplification (“Final Rule”), which amends certain redundant, duplicative, outdated, superseded or overlapping disclosure requirements.  This Final Rule is intended to facilitate disclosure information provided to investors and simplify compliance without significantly impacting the mix of information provided to investors. The amendments also expand the disclosure requirements regarding the analysis of stockholders' equity for interim financial statements, in which entities will be required to present a reconciliation for each period for which a statement of comprehensive income is required to be filed.  While we have not yet adopted the Final Rule which is effective on November 5, 2018, we do not anticipate any material impact to our consolidated financial statements and related disclosures upon adoption.

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Note 3—Revenue Recognition

Prior to the adoption of Topic 606, the Company’s revenue recognition policy was in accordance with ASC Topic 605, Revenue Recognition.  Effective January 1, 2018, the Company adopted Topic 606 using the modified retrospective transition method, resulting in accounting policy changes surrounding revenue recognition which replaced certain related policies discussed under Critical Accounting Policies and Estimates (in Item 7) and Summary of Significant Accounting Policies (in Note 1) of the Company’s 2017 Annual Report.  The adoption of Topic 606 did not have a material impact on the Company’s condensed consolidated financial statements.  The following is a summary of the Company’s revenue recognition and related accounting policies and disclosures resulting from the adoption of Topic 606.

Revenues consist of product sales to either end customers and their appointed contract manufacturers (including original equipment manufacturers) or to distributors, and the vast majority of our sales are recognized at a point-in-time under the core principle of recognizing revenue when control transfers to the customer.  Revenues are derived from contracts with customers, which in most cases are customer purchase orders that may be governed by master sales agreements.  For each contract, the promise to transfer the control of the products, each of which is individually distinct, is considered to be the identified performance obligation. As part of the consideration promised in each contract, the Company evaluates the customer’s credit risk.  Our contracts do not have any significant financing components, as payment terms are generally due net 30 to 120 days after delivery. Although products are almost always sold at fixed prices, in determining the transaction price, we evaluate whether the price is subject to refund (due to returns) or adjustment (due to volume discounts, rebates, or price concessions) to determine the net consideration we expect to be entitled to. We allocate the transaction price to each distinct product based on its relative standalone selling price. Taxes assessed by governmental authorities and collected from the customer, including but not limited to sales and use taxes and value-added taxes, are not included in the transaction price. 

With limited exceptions, the Company recognizes revenue at the point in time when we ship or deliver the product from our manufacturing facility to our customer, when our customer accepts and has legal title of the goods, and the Company has a present right to payment for such goods.  Based on the respective contract terms, most of our contracts’ revenues are recognized either (i) upon shipment based on free on board (“FOB”) shipping point, (ii) when the product arrives at its destination or (iii) when the product is pulled from consignment inventory.  Less than 5% of our net sales are recognized over time, as the associated contracts relate to the sale of goods with no alternative use as they are only sold to a single customer and whose underlying contract terms provide the Company with an enforceable right to payment, including a reasonable profit margin, for performance completed to date, in the event of customer termination. For the contracts recognized over time, we typically record revenue using the input method, based on the materials and labor costs incurred to date relative to the contract’s total estimated costs.  This method reasonably depicts when and as control of the goods transfers to the customer, since it measures our progress in producing the goods, which is generally commensurate with this transfer of control.  Since we typically invoice our customers at the same time that we satisfy our performance obligations, we do not have significant contract assets or contract liabilities related to our contracts with customers recorded in the Condensed Consolidated Balance Sheets. 

The Company receives customer orders negotiated with multiple delivery dates that may extend across more than one reporting period until the contract is fulfilled, the end of the order period is reached, or a pre-determined maximum order value has been reached.  Orders typically fluctuate from quarter to quarter based on customer demand and general business conditions, and it is generally expected that a substantial portion of our remaining performance obligations will be fulfilled within three months.  Nearly all of our performance obligations are fulfilled within one year.  Since our performance obligations are part of contracts that generally have original durations of one year or less, we have elected not to disclose the aggregate amount of transaction prices associated with unsatisfied or partially unsatisfied performance obligations as of September 30, 2018. 

Sales to Distributors and Resellers

Sales to certain distributors and resellers are made under terms allowing certain price adjustments and limited rights of return of the Company’s products held in their inventory or upon sale to their end customers.  The Company maintains a reserve for unprocessed and estimated future price adjustment claims and returns as a refund liability. The

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reserve is recorded as a reduction to revenue in the same period that the related revenue is recorded and is calculated based on an analysis of historical claims and returns over a period of time to appropriately account for current pricing and business trends. Similarly, sales returns and allowances are recorded based on historical return rates, as a reduction to revenue with a corresponding reduction to cost of sales for the estimated cost of inventory that is expected to be returned.  These reserves were not significant upon the adoption of Topic 606 nor were they significant in the Condensed Consolidated Balance Sheet as of September 30, 2018.

Warranty

Standard product warranty coverage which provides assurance that our products will conform to the contractually agreed-upon specifications for a limited period from the date of shipment is typically offered, while extended or separately-priced warranty coverage is typically not offered. The warranty claim is generally limited to a credit equal to the purchase price or a promise to repair or replace the product for a specified period of time at no additional charge. We estimate our warranty liability based on historical experience, product history, and current trends, and record warranty expense in cost of sales in the Condensed Consolidated Statements of Income.  Warranty liabilities and related warranty expense have not been and were not significant in the accompanying Condensed Consolidated Financial Statements as of and for the three and nine months ended September 30, 2018.

Shipping and Handling Costs

The Company accounts for shipping and handling activities related to contracts with customers as a cost to fulfill our promise to transfer control of the related product, including any such costs incurred after the customer has obtained control of the goods.  Shipping and handling costs are generally charged to and paid by the majority of our customers as part of the contract.  For a nominal portion of our customer contracts, primarily for certain customers in the broadband communications market (a market primarily in the Cable Products and Solutions segment), such costs are not separately charged to the customers.  Shipping and handling costs are included in Cost of sales in the accompanying Condensed Consolidated Statements of Income.

Contract Assets and Contract Liabilities

The Company records contract assets or contract liabilities depending on the timing of revenue recognition, billings and cash collections on a contract-by-contract basis.  Contract assets represent unbilled receivables, which generally arise when revenue recognized over time exceed amounts billed to customers.  Contract liabilities represent billings or advanced consideration received from customers in excess of revenue recognized to date.  As the Company’s performance obligations are typically less than one year, these amounts are generally recorded as current in the accompanying Condensed Consolidated Balance Sheets within Other current assets or Other accrued expenses as of September 30, 2018.  Contract assets and contract liabilities recorded in the Company’s Condensed Consolidated Balance Sheets were not significant both at the date of adoption and as of September 30, 2018.

Contract Costs

The Company’s policy is to capitalize any incremental costs incurred to obtain a customer contract, only to the extent that such costs are explicitly chargeable to the customer and the benefit associated with the costs is expected to be longer than one year.  Otherwise, such costs are expensed as incurred and recorded within Selling, general and administrative expenses in the accompanying Condensed Consolidated Statements of Income.  Incremental costs to fulfill customer orders, which are mostly comprised of pre-production and set-up costs, are generally capitalized to the extent such costs are contractually guaranteed to be reimbursed by the customer.  Otherwise, such costs are expensed as incurred.  Capitalized contract costs to obtain a contract or to fulfill a contract that are not accounted for under other existing accounting standards are recorded as either other current or long-term assets on the accompanying Condensed Consolidated Balance Sheets, depending on the timing of when the Company expects to recognize the expense, and are generally amortized consistent with the timing of when transfer of control of the related goods occurs.  Such capitalized contract costs were not significant both at the date of adoption and as of September 30, 2018, and the related amortization expense was not significant for the three and nine months ended September 30, 2018.

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Disaggregation of Net Sales

The following tables show our net sales disaggregated into categories the Company considers meaningful to depict how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors for the three and nine months ended September 30, 2018:

	Three months ended September 30, 2018
	Interconnect		Cable
	Products and		Products and		Total Reportable
	Assemblies		Solutions		Business Segments
Net sales by:
Sales channel:
End customers and contract manufacturers	$	1,725.9	$	89.0	$	1,814.9
Distributors and resellers		293.4		20.7		314.1
	$	2,019.3	$	109.7	$	2,129.0
Geography:
United States	$	517.9	$	54.1	$	572.0
China		696.9		1.4		698.3
Other foreign locations		804.5		54.2		858.7
	$	2,019.3	$	109.7	$	2,129.0

	Nine months ended September 30, 2018
	Interconnect		Cable
	Products and		Products and		Total Reportable
	Assemblies		Solutions		Business Segments
Net sales by:
Sales channel:
End customers and contract manufacturers	$	4,828.9	$	242.8	$	5,071.7
Distributors and resellers		830.6		75.0		905.6
	$	5,659.5	$	317.8	$	5,977.3
Geography:
United States	$	1,519.5	$	155.8	$	1,675.3
China		1,760.0		3.3		1,763.3
Other foreign locations		2,380.0		158.7		2,538.7
	$	5,659.5	$	317.8	$	5,977.3

Net sales by geographic area are based on the customer location to which the product is shipped.

Note 4—Inventories

Inventories consist of:

	September 30,		December 31,
	2018		2017
Raw materials and supplies	$	437.2	$	386.2
Work in process		377.7		358.0
Finished goods		430.6		362.7
	$	1,245.5	$	1,106.9

Note 5—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

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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 herein and in Note 1 of the notes to the consolidated financial statements in the Company’s 2017 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, 2018 and 2017 are as follows:

	Interconnect Products				Cable Products				Total Reportable
	and Assemblies				and Solutions				Business Segments
Three Months Ended September 30:	2018		2017		2018		2017		2018		2017
Net sales:
External	$	2,019.3	$	1,731.5	$	109.7	$	109.3	$	2,129.0	$	1,840.8
Intersegment		3.8		2.7		8.1		10.9		11.9		13.6
Segment operating income		458.1		388.3		14.4		14.3		472.5		402.6
Nine Months Ended September 30:
Net sales:
External	$	5,659.5	$	4,754.3	$	317.8	$	313.1	$	5,977.3	$	5,067.4
Intersegment		9.6		6.9		25.1		31.5		34.7		38.4
Segment operating income		1,268.9		1,060.8		40.4		44.0		1,309.3		1,104.8

A reconciliation of segment operating income to consolidated income before income taxes for the three and nine months ended September 30, 2018 and 2017 is summarized as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Segment operating income	$	472.5	$	402.6	$	1,309.3	$	1,104.8
Interest expense		(24.8)		(24.6)		(75.3)		(67.3)
Other income, net		0.2		5.1		2.5		12.9
Stock-based compensation expense		(14.4)		(12.6)		(40.4)		(37.1)
Acquisition-related expenses		—		—		—		(4.0)
Other operating expenses		(13.9)		(12.1)		(39.6)		(35.5)
Income before income taxes	$	419.6	$	358.4	$	1,156.5	$	973.8

Note 6—Shareholders’ 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.

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

	Amphenol Corporation Shareholders
								Accumulated
	Common Stock							Other
	Shares			Additional		Retained		Comprehensive		Treasury		Noncontrolling		Total
	(in millions)	Amount		Paid-In Capital		Earnings		Loss		Stock		Interests		Equity
Balance as of December 31, 2017	305.7	$	0.3	$	1,249.0	$	2,941.5	$	(201.0)	$	—	$	53.6	$	4,043.4
Cumulative effect of adoption of revenue recognition standard (Note 2)							3.2								3.2
Net income							866.9						8.8		875.7
Other comprehensive loss									(136.3)				(2.7)		(139.0)
Acquisitions resulting in noncontrolling interest													0.3		0.3
Purchase of noncontrolling interest					(2.3)								(5.4)		(7.7)
Distributions to shareholders of noncontrolling interests													(10.2)		(10.2)
Purchase of treasury stock											(680.2)				(680.2)
Retirement of treasury stock	(7.7)						(680.2)				680.2				—
Stock options exercised	3.3				123.0										123.0
Dividends declared							(195.6)								(195.6)
Stock-based compensation expense					40.4										40.4
Balance as of September 30, 2018	301.3	$	0.3	$	1,410.1	$	2,935.8	$	(337.3)	$	—	$	44.4	$	4,053.3

A rollforward of consolidated changes in equity for the nine months ended September 30, 2017 is as follows:

	Amphenol Corporation Shareholders
								Accumulated
	Common Stock							Other
	Shares			Additional		Retained		Comprehensive		Treasury		Noncontrolling		Total
	(in millions)	Amount		Paid-In Capital		Earnings		Loss		Stock		Interests		Equity
Balance as of December 31, 2016	308.3	$	0.3	$	1,020.9	$	3,122.7	$	(469.0)	$	—	$	48.2	$	3,723.1
Net income							753.9						7.2		761.1
Other comprehensive income									182.8				2.1		184.9
Acquisitions resulting in noncontrolling interest													1.2		1.2
Purchase of noncontrolling interest					(5.5)								(9.5)		(15.0)
Distributions to shareholders of noncontrolling interests													(7.1)		(7.1)
Purchase of treasury stock											(555.6)				(555.6)
Retirement of treasury stock	(7.7)						(555.6)				555.6				—
Stock options exercised	4.4				135.3										135.3
Dividends declared							(155.7)								(155.7)
Stock-based compensation expense					37.1										37.1
Balance as of September 30, 2017	305.0	$	0.3	$	1,187.8	$	3,165.3	$	(286.2)	$	—	$	42.1	$	4,109.3

On January 24, 2017, the Company’s Board of Directors authorized a stock repurchase program under which the Company could 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 three months ended March 31, 2018, the Company repurchased 4.2 million shares of its common stock for $382.0 under the 2017 Stock Repurchase Program, bringing total repurchases under this program to approximately 12.6 million shares or $1,000.0, thus completing the 2017 Stock Repurchase Program. 

On April 24, 2018, the Company’s Board of Directors authorized a new stock repurchase program under which the Company may purchase up to $2,000.0 of the Company’s Common Stock during the three-year period ending April 24, 2021 in accordance with the requirements of Rule 10b-18 of the Exchange Act (the “2018 Stock Repurchase Program”).  During the three and nine months ended September 30, 2018, the Company repurchased 0.4 million and 3.5 million shares of its common stock for $34.8 and $298.2, respectively, under the 2018 Stock Repurchase Program.  These treasury shares have been retired by the Company, accordingly common stock and retained earnings were reduced.  The Company has not repurchased any additional shares of its common stock through October 24, 2018, and has remaining authorization to purchase up to approximately $1,701.8 of its common stock under the 2018 Stock Repurchase Program. The price and timing of any future purchases under the 2018 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.

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Contingent upon declaration by the Board of Directors, the Company generally pays a quarterly dividend on shares of its Common Stock.  The following table summarizes the declared quarterly dividends per share as well as the dividends declared and paid for the three and nine months ended September 30, 2018 and 2017: 

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

On April 24, 2018, the Company’s Board of Directors approved an increase to its quarterly dividend rate from $0.19 to $0.23 per share effective with dividends declared in the second quarter of 2018.

Note 7—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, 2018 and 2017 is as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(dollars and shares in millions, except per share data)	2018		2017		2018		2017
Net income attributable to Amphenol Corporation shareholders	$	316.6	$	277.5	$	866.9	$	753.9
Basic weighted average common shares outstanding		300.5		305.0		301.7		305.8
Effect of dilutive stock options		11.9		10.7		11.9		10.3
Diluted weighted average common shares outstanding		312.4		315.7		313.6		316.1
Earnings per share attributable to Amphenol Corporation shareholders:
Basic	$	1.05	$	0.91	$	2.87	$	2.47
Diluted	$	1.01	$	0.88	$	2.76	$	2.39

Excluded from the computations above were anti-dilutive common shares of 6.1 million and 5.3 million for the three months ended September 30, 2018 and 2017, respectively, and 2.5 million and 2.1 million for the nine months ended September 30, 2018 and 2017, respectively.

Note 8—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.

The Company has also received a subpoena from the Department of Defense, Office of the Inspector General, requesting documents pertaining to certain products manufactured by the Company’s Military and Aerospace Group that are purchased or used by the U.S. government. The Company is cooperating with the request. The inquiry is in the early stages and the Company is unable to estimate the timing or outcome of the matter.

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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.

Note 9—Stock-Based Compensation

For the three months ended September 30, 2018 and 2017, the Company’s income before income taxes was reduced for stock-based compensation expense of $14.4 and $12.6, respectively.  In addition, for the three months ended September 30, 2018 and 2017, the Company recognized aggregate income tax benefits associated with stock-based compensation of $8.9 and $19.5, respectively, in the provision for income taxes in the accompanying Condensed Consolidated Statements of Income, which include the excess tax benefits from option exercises of $7.0 and $16.6, respectively.  For the nine months ended September 30, 2018 and 2017, the Company’s income before income taxes was reduced for stock-based compensation expense of $40.4 and $37.1, respectively.  In addition, for the nine months ended September 30, 2018 and 2017, the Company recognized aggregate income tax benefits associated with stock-based compensation of $19.7 and $54.7, respectively, which include the excess tax benefits from option exercises of $14.1 and $45.8, respectively. The impact associated with recognizing excess tax benefits from option exercises in the provision for income taxes 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.

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 plans is included in Selling, general and administrative expenses 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”).  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, 2018, there were 17,002,620 shares of Common Stock available for the granting of additional stock options under 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”).  No additional stock options will be granted under the 2009 Employee Option Plan.  The 2000 Stock Purchase and Option Plan for Key Employees of Amphenol and Subsidiaries, as amended, expired in May 2011 and all options granted thereunder have been either exercised or forfeited.  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. 

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.  The 2004 Directors Option Plan expired in May 2014, except that its terms continue with respect to outstanding options granted thereunder.  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.

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Stock option activity for the three and nine months ended September 30, 2018 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, 2018	33,222,364	$	52.27	7.05	$	1,180.3
Options granted	—
Options exercised	(602,549)
Options forfeited	(32,240)
Options outstanding at March 31, 2018	32,587,575		52.58	6.84		1,093.2
Options granted	6,111,100
Options exercised	(740,046)
Options forfeited	(116,740)
Options outstanding at June 30, 2018	37,841,889		58.50	7.15		1,089.4
Options granted	91,000
Options exercised	(1,952,700)
Options forfeited	(226,020)
Options outstanding at September 30, 2018	35,754,169	$	59.68	7.05	$	1,227.9
Vested and non-vested options expected to vest at September 30, 2018	33,489,508	$	58.93	6.97	$	1,175.0
Exercisable options at September 30, 2018	16,426,149	$	46.22	5.55	$	785.2

A summary of the status of the Company’s non-vested options as of September 30, 2018 and changes during the three and nine months then ended is as follows:

		Weighted
		Average
		Fair Value at
	Options	Grant Date
Non-vested options at January 1, 2018	19,600,440	$	8.29
Options granted	—		—
Options vested	(67,400)		8.13
Options forfeited	(32,240)		8.56
Non-vested options at March 31, 2018	19,500,800		8.29
Options granted	6,111,100		12.82
Options vested	(5,923,180)		8.35
Options forfeited	(116,740)		8.18
Non-vested options at June 30, 2018	19,571,980		9.69
Options granted	91,000		12.82
Options vested	(108,940)		8.40
Options forfeited	(226,020)		9.48
Non-vested options at September 30, 2018	19,328,020	$	9.71

During the three and nine months ended September 30, 2018 and 2017, the following activity occurred under the Company’s option plans:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Total intrinsic value of stock options exercised	$	111.8	$	77.0	$	181.1	$	191.1
Total fair value of stock options vested		0.9		0.7		50.9		46.2

As of September 30, 2018, the total compensation cost related to non-vested options not yet recognized was approximately $152.8 with a weighted average expected amortization period of 3.57 years.

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The grant-date fair value of each option grant under 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, 2018, the number of restricted shares available for grant under the 2012 Directors Restricted Stock Plan was 109,695.  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, 2018 was as follows:

				Weighted Average
				Remaining
	Restricted	Fair Value at		Amortization
	Shares	Grant Date		Term (in years)
Restricted shares outstanding at January 1, 2018	12,905	$	73.25	0.37
Restricted shares granted	—		—
Restricted shares outstanding at March 31, 2018	12,905		73.25	0.13
Shares vested and issued	(13,046)		73.35
Restricted shares granted	14,469		87.93
Restricted shares outstanding at June 30, 2018	14,328		87.98	0.88
Restricted shares granted	—		—
Restricted shares outstanding at September 30, 2018	14,328	$	87.98	0.63

As of September 30, 2018, the total compensation cost related to non-vested restricted shares not yet recognized was approximately $0.8 with a weighted average expected amortization period of 0.63 years.

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

17

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, 2018 and 2017: 

					Other Postretirement
	Pension Benefits				Benefits
Three Months Ended September 30:	2018		2017		2018		2017
Service cost	$	1.8	$	2.5	$	—	$	—
Interest cost		4.9		5.0		0.1		0.1
Expected return on plan assets		(9.6)		(7.8)		—		—
Amortization of prior service cost		0.6		0.7		—		—
Amortization of net actuarial losses		5.8		5.8		0.1		0.2
Net pension expense	$	3.5	$	6.2	$	0.2	$	0.3
Nine Months Ended September 30:
Service cost	$	5.6	$	7.3	$	—	$	—
Interest cost		14.7		14.9		0.3		0.3
Expected return on plan assets		(28.9)		(23.2)		—		—
Amortization of prior service cost		1.8		2.1		—		—
Amortization of net actuarial losses		17.5		17.2		0.3		0.5
Net pension expense	$	10.7	$	18.3	$	0.6	$	0.8

As a result of the adoption of ASU 2017‑07, the Company records service costs in the same line item as the respective employee compensation costs and within operating income, while all other pension-related costs including interest cost, expected return on plan assets, amortization of prior service cost and amortization of net actuarial losses are reported separately within Other income, net in the Condensed Consolidated Statements of Income. 

In January 2018, the Company made a voluntary cash contribution of approximately $81.0 to fully fund the U.S. Plans, and estimates that, based on current actuarial calculations, cash contributions to the Plans will aggregate approximately $90.0 in 2018.  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.  This voluntary cash contribution made in the first quarter of 2018 is reflected as cash used in operating activities within Net change in accrued pension and postretirement benefits in the Condensed Consolidated Statements of Cash Flow.

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 the U.S. defined contribution plans with cash contributions up to a maximum of 5% of eligible compensation.  During the nine months ended September 30, 2018 and 2017, the Company provided matching contributions to the U.S. defined contribution plans of approximately $6.2 and $5.0, respectively.

Note 11—Acquisitions

In the past twelve months, the Company has completed several acquisitions, including three acquisitions which closed in the first nine months of 2018, all in the Interconnect Products and Assemblies segment.  The Company 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 acquisitions were not material to the Company either individually or in the aggregate.

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.  Such acquisition-related expenses are separately presented in the accompanying Condensed Consolidated Statements of Income.

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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, 2017	$	3,896.1	$	146.5	$	4,042.6
Acquisition-related		126.5		—		126.5
Foreign currency translation		(55.4)		—		(55.4)
Goodwill at September 30, 2018	$	3,967.2	$	146.5	$	4,113.7

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 2018, 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.   There has been no goodwill impairment in 2018, 2017 or 2016 in connection with our impairment tests.

Other than goodwill noted above, the Company’s intangible assets as of September 30, 2018 and December 31, 2017 were as follows:

		September 30, 2018						December 31, 2017
	Weighted	Gross				Net		Gross				Net
	Average	Carrying		Accumulated		Carrying		Carrying		Accumulated		Carrying
	Life (years)	Amount		Amortization		Amount		Amount		Amortization		Amount
Customer relationships	10	$	400.2	$	226.2	$	174.0	$	398.1	$	199.8	$	198.3
Proprietary technology	11		107.5		58.1		49.4		107.5		50.7		56.8
Backlog and other	2		34.0		33.7		0.3		34.0		33.6		0.4
Total intangible assets (definite-lived)	10		541.7		318.0		223.7		539.6		284.1		255.5
Trade names (indefinite-lived)			186.1		—		186.1		186.1		—		186.1
		$	727.8	$	318.0	$	409.8	$	725.7	$	284.1	$	441.6

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, 2018 and 2017 was approximately $11.6 and $12.3, respectively.  The amortization expense for the nine months ended September 30, 2018 and 2017 was approximately $35.4 and $36.4, respectively.  As of September 30, 2018, amortization expense relating to the Company’s current intangible assets estimated for the remainder of 2018 is approximately $11.5 and for each of the next five fiscal years is approximately $42.7 in 2019, $37.1 in 2020, $32.4 in 2021, $24.9 in 2022 and $22.2 in 2023.

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 2018, 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 has been no impairment in 2018, 2017 or 2016 as a result of such reviews.

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Note 13—Debt

The Company’s debt (net of any unamortized discount) consists of the following:

	September 30, 2018				December 31, 2017
	Carrying		Approximate		Carrying		Approximate
	Amount		Fair Value		Amount		Fair Value
Revolving Credit Facility	$	—	$	—	$	—	$	—
U.S. Commercial Paper Program		337.9		337.9		1,175.4		1,175.4
Euro Commercial Paper Program		512.9		512.9		—		—
2.55% Senior Notes due January 2019		749.9		749.5		749.8		752.8
2.20% Senior Notes due April 2020		399.8		393.6		399.8		398.0
3.125% Senior Notes due September 2021		374.9		371.4		374.8		381.2
4.00% Senior Notes due February 2022		499.6		506.9		499.5		522.5
3.20% Senior Notes due April 2024		349.7		335.7		349.6		351.9
Notes payable to foreign banks and other debt		43.6		43.6		6.6		6.6
Less unamortized deferred debt issuance costs		(9.8)		—		(12.9)		—
Total debt		3,258.5		3,251.5		3,542.6		3,588.4
Less current portion		790.2		789.8		1.1		1.1
Total long-term debt	$	2,468.3	$	2,461.7	$	3,541.5	$	3,587.3

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, 2018, there were no borrowings under the Revolving Credit Facility.  The carrying value of any borrowings under the Revolving Credit Facility would approximate their fair value due primarily to their market interest rates and would be classified as Level 2 in the fair value hierarchy (Note 15).  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, 2018, the Company was in compliance with the financial covenants under the Revolving Credit Facility.

Commercial Paper Programs

The Company has a commercial paper program pursuant to which the Company issues short-term unsecured commercial paper notes (“U.S. Commercial Paper” or “USCP Notes”) in one or more private placements in the United States (the “U.S. Commercial Paper Program”).  The maturities of the USCP Notes vary, but may not exceed 397 days from the date of issue.  The USCP Notes are 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 bear varying interest rates on a fixed or floating basis.  The average interest rate on the U.S. Commercial Paper as of September 30, 2018 was 2.36%. 

On July 10, 2018, the Company and one of its wholly owned European subsidiaries (the “Euro Issuer”) entered into a euro-commercial paper program (the “Euro Commercial Paper Program” and, together with the U.S. Commercial Paper Program, the “Commercial Paper Programs”) pursuant to which the Euro Issuer may issue short-term unsecured commercial paper notes (the “ECP Notes” and, together with the USCP Notes, “Commercial Paper”), which are guaranteed by the Company and are to be issued outside of the United States.  The maturities of the ECP Notes will vary, but may not exceed 183 days from the date of issue.  The ECP Notes are sold under customary terms in the euro-commercial paper market and may be issued at par or a discount therefrom or a premium thereto and bear varying interest rates on a fixed or floating basis.  The ECP Notes may be issued in Euros, Sterling, U.S. Dollars or other currencies.   As of September 30, 2018, the amount of ECP Notes outstanding was €442.0 (approximately $512.9), with an average interest rate of (0.13)%. 

 Amounts available under the Commercial Paper Programs may be borrowed, repaid and re-borrowed from time to time. The Company’s Board of Directors’ authorization for the ECP Notes currently limits the maximum aggregate principal amount outstanding of USCP Notes, ECP Notes, and any other commercial paper, euro-commercial paper or

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similar programs at any time to $2,000.0.  The Commercial Paper Programs are rated A-2 by Standard & Poor’s and P-2 by Moody’s and are currently backstopped by the Revolving Credit Facility, as amounts undrawn under the Company’s existing Revolving Credit Facility are available to repay Commercial Paper, if necessary.  Net proceeds of the issuances of the Commercial Paper are expected to be used for general corporate purposes.  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 15).  The carrying value of Commercial Paper borrowings approximates their fair value.   

U.S. Senior Notes

All of the Company’s outstanding senior notes in the United States (“U.S. 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 U.S. Senior Notes is payable semiannually. The Company may, at its option, redeem some or all of any series of U.S. 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 U.S. 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 15).  The 2.55% Senior Notes are due in January 2019 and are therefore 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 as of September 30, 2018.  The U.S. Senior Notes contain certain financial and non-financial covenants.  At September 30, 2018, the Company was in compliance with the financial covenants under its U.S. Senior Notes.

During the first nine months of 2017, the Company issued two senior notes, aggregating $750.0 principal amount of unsecured notes, and incurred approximately $5.2 of costs related to the issuances of these senior notes, which costs are amortized to interest expense over the respective terms of the debt.  In September 2017, the Company used the net proceeds from these senior notes to repay all of its outstanding $375.0 principal amount of 1.55% Senior Notes that were due September 15, 2017, with the remainder of the net proceeds being used for general corporate purposes.  The cash flow impact associated with both the issuances of these senior notes and the repayment of the 1.55% Senior Notes during the first nine months of 2017 is reflected within cash flows from financing activities within the accompanying Condensed Consolidated Statements of Cash Flow.

Euro Senior Notes

On October 8, 2018, the Euro Issuer issued €500.0 (approximately $574.6) principal amount of unsecured 2.000% Senior Notes due October 8, 2028 at 99.498% of face value (the “2028 Euro Notes”).  The 2028 Euro Notes are unsecured and rank equally in right of payment with the Euro Issuer’s other unsecured senior indebtedness, and are guaranteed on a senior unsecured basis by the Company.  Interest on the 2028 Euro Notes is payable annually  on October 8 of each year, commencing on October 8, 2019.  The Company may, at its option, redeem some or all of the 2028 Euro 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 July 8, 2028, a make-whole premium.  The Company used a portion of the net proceeds from the 2028 Euro Notes to repay a portion of the outstanding amounts under its Commercial Paper Programs, with the remainder of the net proceeds being used for general corporate purposes.  The 2028 Euro Notes contain certain financial and non-financial covenants.

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Note 14—Income Taxes

	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
Provision for income taxes	$	(100.0)		$	(78.1)		$	(280.8)		$	(212.7)
Effective tax rate		23.8	%		21.8	%		24.3	%		21.8	%

For the three months ended September 30, 2018 and 2017, stock option exercise activity had the impact of lowering our Provision for income taxes by approximately $7.0 and $16.6, respectively, and lowering our effective tax rate by approximately 170 basis points and 470 basis points, respectively, due to the recognition of excess tax benefits within Provision for income taxes in the accompanying Condensed Consolidated Statements of Income.  For the nine months ended September 30, 2018 and 2017, stock option exercise activity had the impact of lowering our Provision for income taxes by approximately $14.1 and $45.8, respectively, and lowering our effective tax rate by approximately 120 basis points and 470 basis points, respectively.

On December 22, 2017, the United States federal government enacted the Tax Cuts and Jobs Act (“Tax Act”), marking a change from a worldwide tax system to a modified territorial tax system in the United States.  As part of this change, the Tax Act, among other changes, provides for a transition tax on the accumulated unremitted foreign earnings and profits of the Company’s foreign subsidiaries (“Transition Tax”) and a reduction of the U.S. federal corporate income tax rate from 35% to 21%.  In the fourth quarter of 2017, the Company recorded an income tax charge of $398.5 (“Tax Act Charge”) that was comprised of (i) the Transition Tax of $259.4, (ii) a charge of $176.6 related to changes in the Company’s permanent reinvestment assertion with regards to prior accumulated unremitted earnings from certain foreign subsidiaries, partially offset by (iii) a tax benefit of $37.5 associated with the remeasurement of the Company’s U.S. net deferred tax liabilities due to the U.S. federal corporate tax rate reduction.  These three components were provisional amounts recorded in accordance with Staff Accounting Bulletin No. 118 (“SAB 118”) (now codified in ASU 2018-05), which addresses the application of U.S. GAAP in situations where a registrant does not have the necessary information available, prepared, or analyzed in reasonable detail to complete the accounting for certain income tax effects of the Tax Act.  Due to the timing of the Tax Act’s enactment and the complexity of its provisions, the Company has not completed its accounting for the impact of the Tax Act.  The Company continues to analyze guidance and technical interpretations of the provisions of the Tax Act, as well as refine, analyze and update the underlying data, computations and assumptions used to prepare these provisional amounts.  The Company did not make any adjustments to the Tax Act Charge in the first nine months of 2018.  In accordance with ASU 2018-05, the Company will complete its accounting for the income tax effects of the Tax Act within the one-year measurement period in 2018 once the Company has obtained, prepared and fully analyzed all the necessary information related to all three components of the Tax Act Charge recorded in the fourth quarter of 2017.  The Company will pay the Transition Tax, net of applicable tax credits and deductions, in annual installments until 2025, as permitted under the Tax Act.  The Company paid its first annual installment of the Transition Tax of approximately $18.0 in the second quarter of 2018.

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, 2018, the amount of the liability for unrecognized tax benefits, including penalties and interest, which if recognized would impact the effective tax rate, was approximately $125.9, 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 $15.5.

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Note 15—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 for 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, 2018 and December 31, 2017 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, 2018:
Short-term investments	$	21.5	$	21.5	$	—	$	—
Forward contracts		2.5		—		2.5		—
Total	$	24.0	$	21.5	$	2.5	$	—
December 31, 2017:
Short-term investments	$	34.6	$	34.6	$	—	$	—
Forward contracts		2.3		—		2.3		—
Total	$	36.9	$	34.6	$	2.3	$	—

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 amounts 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, 2018 and 2017 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.

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Item 2.	MANAGEMENT’S DISCUSSION AND ANALYSIS
	OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
	(amounts in millions, except share and per share data, unless otherwise noted)

The following discussion and analysis of the results of operations and financial condition for the three and nine months ended September 30, 2018 and 2017 has been derived from and should be read in conjunction with our unaudited condensed consolidated financial statements and the accompanying notes included herein for Amphenol Corporation (“Amphenol”, the “Company”, “we”, “our”, or “us”), which are prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”).  The following discussion and analysis also includes references to certain non-GAAP financial measures, which are defined in the “Non-GAAP Financial Measures” section below, including “Constant Currency Net Sales Growth” and “Organic Net Sales Growth”.  For purposes of the following discussion, the terms “constant currencies” and “organically” have the same meaning as these aforementioned non-GAAP financial measures.  Refer to “Non-GAAP Financial Measures” within this Item 2 for more information, including our reasons for including the non-GAAP financial measures and material limitations with respect to the usefulness of the measures.

Safe Harbor Statement

This Quarterly Report on Form 10-Q includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, which relate to future, not past, events and are subject to risks and uncertainties. The forward-looking statements, which address the Company’s expected business and financial performance and financial condition, among other matters, may contain words such as: “anticipate,” “could,” “continue,” “expect,” “estimate,” “forecast,” “ongoing,” “project,” “seek,” “predict,” “target,” “will,” “intend,” “plan,” “optimistic,” “potential,” “guidance,” “may,” “should,”  or “would” and other words and terms of similar meaning.

Forward-looking statements by their nature address matters that are, to different degrees, uncertain, such as statements about expected earnings, revenues, growth, liquidity or other financial matters.  Although the Company believes the expectations reflected in such forward-looking statements, including those with regards to results of operations, liquidity or the Company’s effective tax rate and the related impact of the U.S. Tax Cuts and Jobs Act (“Tax Act”), are based upon reasonable assumptions, the expectations may not be attained or there may be material deviation.  Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date on which they are made.  Factors that could cause actual results to differ materially from these forward-looking statements, include, but are not limited to, the following:  the Company’s dependence on sales to the communications industry, which markets are dominated by large manufacturers and operators who regularly exert significant pressure on suppliers such as the Company; the Company’s dependence on sales to the military market, including the impact of reductions or changes in the defense budgets of U.S. and foreign governments; the Company’s ability to compete successfully on the basis of technology innovation, product quality, price, customer service and delivery time; the Company’s ability to continue to conceive, design, source and market new products, as well as market acceptance of the Company’s existing and future product lines, for continued revenue growth; the Company’s ability to access the capital markets on favorable terms, including as a result of significant deterioration of general economic or capital market conditions, or as a result of a downgrade in the Company’s credit rating; changes in exchange rates of the various currencies in which the Company conducts business, including possible currency devaluations; changes in interest rates which could impact existing or future issuances of debt; changes in tax laws, regulations and guidance, including related interpretations, in the United States and foreign jurisdictions, such as the Tax Act; political, economic, military and other risks in countries outside of the United States, including political, economic, financial or other instability, intergovernmental conflicts or actions, strikes or natural disasters; the impact of general economic conditions, geopolitical conditions and U.S. trade policies, legislation, treaties and tariffs, including those affecting China, on the Company’s business operations; difficulties and unanticipated expenses in connection with purchasing and integrating newly acquired businesses as part of the Company’s growth strategy, including the potential for the impairment of goodwill; the Company’s ability to obtain a consistent supply of materials, at stable pricing levels, used in the Company’s manufacturing processes, including aluminum, steel, copper, titanium, metal alloys, gold, silver, certain rare earth metals and plastic resins; litigation or environmental matters including changes to laws and regulations that the

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Company may be subject to; and cybersecurity threats or incidents that could arise.  Such forward-looking statements may also be impacted by, among other things, clarifications to and additional guidance under the Tax Act.  More specifically, on December 22, 2017, the Tax Act was enacted and it significantly revised U.S. corporate income tax law by, among other things, reducing the U.S. corporate income tax rate to 21% and implementing a modified territorial tax system that includes a one-time transition tax on deemed repatriated earnings of foreign subsidiaries. The provisional income tax charge recorded in the fourth quarter of 2017 incorporated assumptions made based on the Company’s current interpretation of the Tax Act and information then available. The Company continues to obtain, prepare and fully analyze all of the necessary information in order to complete its accounting of the Tax Act, which may require adjustments in the fourth quarter of 2018 related to this charge.

A further description of these uncertainties and other risks can be found in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017, Quarterly Reports on Form 10-Q and the Company’s other reports filed with the Securities and Exchange Commission.  These or other uncertainties may cause the Company’s actual future results to be materially different than those expressed in any forward-looking statements. The Company undertakes no obligation to update or revise any forward-looking statements.

Tax Cuts and Jobs Act of 2017

On December 22, 2017, the United States federal government enacted the Tax Act, marking a change from a worldwide tax system to a modified territorial tax system in the United States.  As part of this change, the Tax Act, among other changes, provides for a transition tax on the accumulated unremitted foreign earnings and profits of the Company’s foreign subsidiaries (“Transition Tax”) and a reduction of the U.S. federal corporate income tax rate from 35% to 21%.  In the fourth quarter of 2017, the Company recorded an income tax charge of $398.5 (“Tax Act Charge”) that was comprised of (i) the Transition Tax of $259.4, (ii) a charge of $176.6 related to changes in the Company’s permanent reinvestment assertion with regards to prior accumulated unremitted earnings from certain foreign subsidiaries, partially offset by (iii) a tax benefit of $37.5 associated with the remeasurement of the Company’s U.S. net deferred tax liabilities due to the U.S. federal corporate tax rate reduction.  The three components of the Tax Act Charge are provisional amounts recorded in accordance with Staff Accounting Bulletin No. 118 (“SAB 118”) (now codified in ASU 2018-05, Income Taxes (Topic 740): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118). SAB 118 addresses the application of U.S. GAAP in situations where a registrant does not have the necessary information available, prepared, or analyzed in reasonable detail to complete the accounting for certain income tax effects of the Tax Act.  Due to the timing of the Tax Act’s enactment and the complexity of its provisions, the Company has not completed its accounting for the impact of the Tax Act.  The Company continues to analyze guidance and technical interpretations of the provisions of the Tax Act, as well as refine, analyze and update the underlying data, computations and assumptions used to prepare the Tax Act Charge.  In accordance with ASU 2018-05, the Company will complete its accounting for the income tax effects of the Tax Act within the one-year measurement period in 2018, once the Company has obtained, prepared and fully analyzed all the necessary information related to all three components of the Tax Act Charge recorded in the fourth quarter of 2017.  The Company did not make any adjustments to the Tax Act Charge during the first nine months of 2018.

Results of Operations

Three and nine months ended September 30, 2018 compared to the three and nine months ended September 30, 2017

Net sales were $2,129.0 in the third quarter of 2018 compared to $1,840.8 in the third quarter of 2017, which represented an increase of 16% in U.S. dollars, 17% in constant currencies and 15% organically over the same respective prior year period.  Net sales were $5,977.3 in the first nine months of 2018 compared to $5,067.4 in the first nine months of 2017, which represented an increase of 18% in U.S. dollars, 16% in constant currencies and 13% organically over the same respective prior year period.  Net sales in the Interconnect Products and Assemblies segment (approximately 95% of net sales) in the third quarter of 2018 increased 17% in U.S. dollars, 17% in constant currencies and 15% organically, compared to the third quarter of 2017 and in the first nine months of 2018 increased 19% in U.S. dollars, 17% in constant currencies and 14% organically, compared to the first nine months of 2017.  The sales growth in both periods was driven by increases in the mobile devices, military, information technology and data communications, industrial, mobile networks, automotive and commercial aerospace markets, arising primarily from organic growth along with

25

contributions from the Company’s acquisitions.  Net sales in the Cable Products and Solutions segment (approximately 5% of net sales) in the third quarter of 2018, which primarily serves the broadband market, was flat in U.S. dollars, and increased 4% in constant currencies and 4% organically, compared to the third quarter of 2017 and in the first nine months of 2018 increased 2% in U.S. dollars, 3% in constant currencies and 3% organically, compared to the same period in 2017.

The table below reconciles Constant Currency Net Sales Growth and Organic Net Sales Growth to the most directly comparable U.S. GAAP financial measures for the three and nine months ended September 30, 2018 compared to the three and nine months ended September 30, 2017:

					Percentage Growth (relative to same prior year period)
					Net sales		Foreign		Constant				Organic
					growth in		currency		Currency Net		Acquisition		Net Sales
					U.S.Dollars(1)		impact(2)		SalesGrowth(3)		impact(4)		Growth(3)
Three Months Ended September 30:	2018		2017		(GAAP)		(non-GAAP)		(non-GAAP)		(non-GAAP)		(non-GAAP)
Net sales:
Interconnect Products and Assemblies	$	2,019.3	$	1,731.5	17	%	—	%	17	%	2	%	15	%
Cable Products and Solutions		109.7		109.3	—	%	(4)	%	4	%	—	%	4	%
Consolidated	$	2,129.0	$	1,840.8	16	%	(1)	%	17	%	2	%	15	%
Nine Months Ended September 30:
Net sales:
Interconnect Products and Assemblies	$	5,659.5	$	4,754.3	19	%	2	%	17	%	3	%	14	%
Cable Products and Solutions		317.8		313.1	2	%	(1)	%	3	%	—	%	3	%
Consolidated	$	5,977.3	$	5,067.4	18	%	2	%	16	%	3	%	13	%

(1) Net sales growth in U.S. dollars is calculated based on Net sales as reported in the Condensed Consolidated Statements of Income and Note 5 of the accompanying financial statements.

(2) Foreign currency translation impact, a non-GAAP measure, represents the impact on net sales resulting from foreign currency exchange rate changes in the current year period(s) compared to the same period(s) in the prior year.  Such amount is calculated by subtracting current year net sales translated at average foreign currency exchange rates for the respective prior periods from current year reported net sales, taken as a percentage of the respective prior period net sales.    

(3) Constant Currency Net Sales Growth and Organic Net Sales Growth are non-GAAP financial measures as defined in the "Non-GAAP Financial Measures" section.

(4) Acquisition impact, a non-GAAP measure, represents the impact on net sales resulting from acquisitions closed since the beginning of the prior calendar year, which were not included in the Company’s results as of the comparable prior year periods and which do not reflect the underlying growth of the Company on a comparative basis.

Geographically, sales in the United States in the third quarter of 2018 increased approximately 14% in U.S. dollars ($572.0 in 2018 versus $502.7 in 2017) and 12% organically, compared to the third quarter of 2017, and increased 17% in U.S. dollars ($1,675.3 in 2018 versus $1,437.1 in 2017) and 12% organically in the first nine months of 2018, compared to the first nine months of 2017.  Foreign sales in the third quarter of 2018 increased approximately 16% in U.S. dollars ($1,557.0 in 2018 versus $1,338.1 in 2017), 17% in constant currencies and 16% organically, compared to the third quarter of 2017, and increased 19% in U.S. dollars ($4,302.0 in 2018 versus $3,630.3 in 2017), 16% in constant currencies and 14% organically in the first nine months of 2018, compared to the first nine months of 2017.  The comparatively stronger U.S. dollar for the third quarter of 2018 had the effect of decreasing sales by approximately $15.6, compared to the same period in 2017.The comparatively weaker U.S. dollar for the first nine months of 2018 had the effect of increasing sales by approximately $87.2, compared to the same period in 2017.

Selling, general and administrative expenses increased to $244.0 or 11.5% of net sales and $710.6 or 11.9% of net sales for the third quarter and first nine months of 2018, respectively, compared to $228.2 or 12.4% of net sales and $642.4 or 12.7% of net sales for the third quarter and first nine months of 2017, respectively.  Administrative expenses represented approximately 4.6% and 4.8% of net sales for the third quarter and first nine months of 2018, respectively, and represented approximately 4.8% and 4.9% of net sales for the third quarter and first nine months of 2017, respectively.  Research and development expenses represented approximately 2.6% and 2.7% of net sales for the third quarter and first nine months of 2018, respectively, and represented 2.8% of net sales for both the third quarter and first nine months of 2017.  Selling and marketing expenses represented approximately 4.2% and 4.4% of net sales for the third quarter and first nine months of 2018, respectively, and represented approximately 4.8% and 5.0% of net sales for the third quarter and first nine months of 2017, respectively.

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Operating income was $444.2 or 20.9% of net sales and $1,229.3 or 20.6% of net sales for the third quarter and first nine months of 2018, respectively, compared to $377.9 or 20.5% of net sales and $1,028.2 or 20.3% of net sales for the third quarter and first nine months of 2017, respectively.  Operating income for the first nine months of 2017 included $4.0 of acquisition-related expenses (separately presented in the Condensed Consolidated Statements of Income) related to external transaction costs incurred in the second quarter of 2017. These expenses had an impact on net income of $3.7 or $0.01 per share for the nine months ended September 30, 2017.  Excluding the effect of these acquisition-related expenses, Adjusted Operating Income and Adjusted Operating Margin, as defined in the “Non-GAAP Financial Measures” section below, was $1,032.2 or 20.4% of net sales for the nine months ended September 30, 2017.  The increase in the Adjusted Operating Margin for the three and nine months ended September 30, 2018, compared to the same respective periods in 2017, was driven primarily by an increase in operating margin for the Interconnect Products and Assemblies segment.  Operating income for the Interconnect Products and Assemblies segment for the third quarter and first nine months of 2018 was $458.1 or 22.7% of net sales and $1,268.9 or 22.4% of net sales, respectively, compared to $388.3 or 22.4% of net sales and $1,060.8 or 22.3% of net sales for the third quarter and first nine months of 2017, respectively.  The increase in operating margin for the Interconnect Products and Assemblies segment for the third quarter and first nine months of 2018, compared to the same respective periods of 2017, resulted primarily from higher sales volumes combined with strong operating execution.  Operating income for the Cable Products and Solutions segment for the third quarter and first nine months of 2018 was $14.4 or 13.1% of net sales and $40.4 or 12.7% of net sales, respectively, compared to $14.3 or 13.1% of net sales and $44.0 or 14.0% of net sales for the third quarter and first nine months of 2017, respectively.  The decrease in operating margin for the Cable Products and Solutions segment for the first nine months of 2018, compared to the same respective period of 2017, was primarily driven by increases in certain commodity costs.

Interest expense for the third quarter and first nine months of 2018 was $24.8 and $75.3, respectively, compared to $24.6 and $67.3 for the third quarter and first nine months of 2017, respectively.  The increase in interest expense for the first nine months of 2018 is primarily due to higher average interest rates associated with the Company’s commercial paper borrowings as well as the senior note issuances in April 2017, along with higher average debt levels used to fund the Company’s dividend and stock buyback programs.

Provision for income taxes for the third quarter and first nine months of 2018 was at an effective tax rate of 23.8% and 24.3%, respectively, compared to 21.8% for both the third quarter and first nine months of 2017.  For the third quarter and first nine months of 2018 and 2017, the excess tax benefits resulting from stock option exercise activity had the impact of lowering the effective tax rate and increasing earnings per share by the amounts noted in the table below.  Excluding the effect of these items, the Adjusted Effective Tax Rate, a non-GAAP financial measure as defined in the “Non-GAAP Financial Measures” section below within this Item 2, for the three and nine months ended September 30, 2018 was 25.5%, and for the three and nine months ended September 30, 2017 was 26.5%, as reconciled in the tables below to the comparable effective tax rate based on GAAP results.  Refer to Note 14 of the Condensed Consolidated Financial Statements for further information related to income taxes.

Net income attributable to Amphenol Corporation and Net income per common share-Diluted (“Diluted EPS”) were $316.6 and $1.01, respectively, for the third quarter of 2018, compared to $277.5 and $0.88, respectively, for the third quarter of 2017.  Excluding the effect of the excess tax benefits related to stock-based compensation and acquisition-related expenses, Adjusted Net Income attributable to Amphenol Corporation and Adjusted Diluted EPS, non-GAAP financial measures as defined in the “Non-GAAP Financial Measures” section below within this Item 2, were $309.6 and $0.99, respectively, for the third quarter of 2018, compared to $260.9 and $0.83, respectively, for the third quarter of 2017.  Net income attributable to Amphenol Corporation and Diluted EPS were $866.9 and $2.76, respectively, for the first nine months of 2018, compared to $753.9 and $2.39, respectively, for the first nine months of 2017.  Excluding the effect of the excess tax benefits related to stock-based compensation and acquisition-related expenses, Adjusted Net Income attributable to Amphenol Corporation and Adjusted Diluted EPS, were $852.8 and $2.72, respectively, for the first nine months of 2018, compared to $711.8 and $2.26, respectively, for the first nine months of 2017. 

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The following tables reconcile Adjusted Operating Income, Adjusted Operating Margin, Adjusted Net Income attributable to Amphenol Corporation, Adjusted Effective Tax Rate and Adjusted Diluted EPS (all defined in the “Non-GAAP Financial Measures” section below) to the most directly comparable U.S. GAAP financial measures for the three and nine months ended September 30, 2018 and 2017:

	Three Months Ended September 30,
	2018										2017
					Net Income										Net Income
					attributable		Effective								attributable		Effective
	Operating		Operating		to Amphenol		Tax		Diluted		Operating		Operating		to Amphenol		Tax		Diluted
	Income		Margin (1)		Corporation		Rate (1)		EPS		Income		Margin (1)		Corporation		Rate (1)		EPS
Reported (GAAP)	$	444.2	20.9	%	$	316.6	23.8	%	$	1.01	$	377.9	20.5	%	$	277.5	21.8	%	$	0.88
Excess tax benefits related to stock-based compensation		-	-			(7.0)	1.7			(0.02)		-	-			(16.6)	4.7			(0.05)
Adjusted (non-GAAP)	$	444.2	20.9	%	$	309.6	25.5	%	$	0.99	$	377.9	20.5	%	$	260.9	26.5	%	$	0.83

	Nine Months Ended September 30,
	2018										2017
					Net Income										Net Income
					attributable		Effective								attributable		Effective
	Operating		Operating		to Amphenol		Tax		Diluted		Operating		Operating		to Amphenol		Tax		Diluted
	Income		Margin (1)		Corporation		Rate (1)		EPS		Income		Margin (1)		Corporation		Rate (1)		EPS
Reported (GAAP)	$	1,229.3	20.6	%	$	866.9	24.3	%	$	2.76	$	1,028.2	20.3	%	$	753.9	21.8	%	$	2.39
Acquisition-related expenses		-	-			-	-			-		4.0	0.1			3.7	-			0.01
Excess tax benefits related to stock-based compensation		-	-			(14.1)	1.2			(0.04)		-	-			(45.8)	4.7			(0.14)
Adjusted (non-GAAP)	$	1,229.3	20.6	%	$	852.8	25.5	%	$	2.72	$	1,032.2	20.4	%	$	711.8	26.5	%	$	2.26

(1) While the terms “operating margin” and “effective tax rate” are not considered U.S. GAAP financial measures, for purposes of this table, we derive the reported (GAAP) measures based on GAAP results, which serve as the basis for the reconciliation to their comparable non-GAAP financial measure.

Liquidity and Capital Resources

At September 30, 2018 and December 31, 2017, the Company had cash, cash equivalents and short-term investments of $1,019.8 and $1,753.7, respectively.  The vast majority of the Company’s cash, cash equivalents and short-term investments on hand as of December 31, 2017 and September 30, 2018 is located outside of the United States.  Prior to the Tax Act, the Company asserted its intention to indefinitely reinvest outside of the United States all of its foreign earnings not otherwise distributed currently.  For earnings occurring on or after January 1, 2018, the Tax Act’s change to a modified territorial tax system in the United States has significantly reduced the U.S. tax expense associated with the remittance of foreign earnings, among other changes.  The Tax Act also imposed a one-time transition tax on all of the Company’s pre-2018 accumulated unremitted foreign earnings.  As a result, on December 31, 2017, the Company recorded a provisional U.S. tax expense for the Transition Tax.  This Transition Tax on the deemed repatriation of the accumulated unremitted earnings and profits of foreign subsidiaries, will be paid, net of applicable tax credits and deductions, in annual installments until 2025, as permitted under the Tax Act.  In the second quarter of 2018, the Company paid the first annual installment of the Transition Tax of approximately $18.0.  The Company does not believe that these future tax payments will have a significant impact on its liquidity or capital resources.   

Since the Company’s intention on December 31, 2017 due to the Tax Act changes was to repatriate most of its pre-2018 accumulated earnings over time, it also recorded a provisional foreign and U.S. state and local tax cost related to such repatriation.  Such taxes will be paid when those respective accumulated earnings are repatriated.  In the first nine months of 2018, the Company repatriated a significant amount of its foreign accumulated cash, cash equivalents and short-term investments and as a result, paid approximately $43.0 of foreign and U.S. state and local taxes, the majority of which was paid in the second quarter of 2018.  The Company intends to continue to repatriate certain foreign earnings generated prior to 2018.  The Company also intends to indefinitely reinvest outside of the United States all of its post-2017 foreign earnings not otherwise distributed currently.  For post-2017 earnings that the Company will selectively

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distribute currently, the Company will accrue foreign and U.S. state and local taxes, if any, on those earnings as appropriate.  

Cash Flow Summary

The following table summarizes the Company’s cash flows from operating, investing and financing activities for the nine months ended September 30, 2018 and 2017, as reflected in the Condensed Consolidated Statements of Cash Flow:

	Nine Months Ended September 30,
	2018		2017
Net cash provided by operating activities	$	734.5	$	716.4
Net cash used in investing activities		(350.3)		(293.0)
Net cash used in financing activities		(1,068.6)		(47.7)
Effect of exchange rate changes on cash and cash equivalents		(36.4)		41.9
Net change in cash and cash equivalents	$	(720.8)	$	417.6

Operating Activities

The ability to generate cash from operating activities is one of the Company’s fundamental financial strengths.  Cash flow provided by operating activities was $734.5 in the first nine months of 2018 compared to $716.4 in the first nine months of 2017.  The increase in cash flow provided by operating activities (“Operating Cash Flow”) for the first nine months of 2018 compared to the first nine months of 2017 is primarily related to an increase in net income in the first nine months of 2018 which was partially offset by (i) the Company’s voluntary cash contribution of approximately $81.0 in the first quarter of 2018 to fully fund its U.S. defined benefit pension plans (“U.S. Plans”, and together with its foreign plans, the “Plans”) and (ii) certain tax payments made during the first nine months of 2018 related to the Tax Act of approximately $61.0, including the first annual installment of the Transition Tax of approximately $18.0 in the second quarter of 2018 and payments for foreign and state withholding and income taxes of approximately $43.0 related to foreign cash repatriated during the first nine months of 2018.

In the first nine months of 2018, the components of working capital as presented on the accompanying Condensed Consolidated Statements of Cash Flow increased $246.4, excluding the impact of acquisitions and foreign currency translation, primarily due to an increase in inventories of $184.2, accounts receivable of $182.5 and other current assets of $61.3, partially offset by increases in accounts payable of $150.8 and accrued liabilities, including income taxes, of $30.8.  In the first nine months of 2017, the components of working capital as presented on the accompanying Condensed Consolidated Statements of Cash Flow increased $252.8, excluding the impact of acquisitions and foreign currency translation, primarily due to increases in accounts receivable, inventories and other current assets of $141.2, $107.4 and $61.9, respectively, partially offset by an increase in accounts payable of $103.4.

The following describes the significant changes in the amounts as presented on the accompanying Condensed Consolidated Balance Sheets at September 30, 2018 as compared to December 31, 2017.  Accounts receivable increased $139.0 to $1,737.6, primarily due to higher sales in the third quarter of 2018 relative to the fourth quarter of 2017, which were partially offset by the effect of translation from exchange rate changes at September 30, 2018 compared to December 31, 2017 (“Translation”).  Days sales outstanding at September 30, 2018 and December 31, 2017 were approximately 73 days. Inventories increased $138.6 to $1,245.5, primarily to support higher sales levels, partially offset by Translation.  Inventory days at September 30, 2018 and December 31, 2017 were 78 and 76 days, respectively.  Other current assets increased $81.8 to $278.6, primarily due to the increase in other receivables as well as the recording of contract assets of $27.9 as of September 30, 2018 as a result of the adoption of Topic 606.  Property, plant and equipment, net, increased $69.6 to $886.4, primarily due to capital additions of $253.6, partially offset by depreciation of $155.3 and Translation.  Goodwill increased $71.1 to $4,113.7, primarily as a result of goodwill recognized related to three acquisitions in the Interconnect Products and Assemblies segment that closed during the first nine months of 2018, which was partially offset by Translation.  Intangibles, net and other long-term assets decreased $27.5 to $461.0, primarily as a result of amortization related to the Company’s intangible assets.  Accounts payable increased $138.4 to $1,014.0, primarily as a result of increased purchasing activity due to higher sales levels, which was partially offset by payments on outstanding payables and Translation.  Payable days at September 30, 2018 and December 31, 2017 were

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approximately 63 and 60 days, respectively.  Total accrued expenses, including accrued income taxes, increased $36.3 to $739.0, primarily as a result of an increase in accrued income taxes and certain employee-related compensation and benefit costs, which were partially offset by the first annual installment payment of the Transition Tax as well as foreign and state withholding and income taxes paid related to foreign cash repatriated.  Accrued pension and postretirement benefit obligations decreased $101.0 to $171.0, primarily due to the Company’s voluntary cash contribution of approximately $81.0 in January 2018 to fully fund the Company’s U.S. Plans.  Other long-term liabilities, including deferred taxes, decreased $60.8 to $506.8, primarily as a result of a reduction in deferred foreign and state withholding and income taxes.

The Company estimates that, based on current actuarial calculations and including the first quarter contribution to its U.S. Plans, cash contributions to the Plans will aggregate approximately $90.0 in 2018.  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.

In addition to cash flow from operating activities, the Company also considers Free Cash Flow, a non-GAAP financial measure defined in the “Non-GAAP Financial Measures” section below, as a key metric in measuring the Company’s ability to generate cash.  The following table reconciles Free Cash Flow to its most directly comparable U.S. GAAP financial measure for the nine months ended September 30, 2018 and 2017.  The decrease in Free Cash Flow is primarily driven by an increase in capital expenditures to support certain new customer programs, which was partially offset by an increase in operating cash flow, as described above.

	Nine Months Ended September 30,
	2018		2017
Operating Cash Flow (GAAP)	$	734.5	$	716.4
Capital expenditures (GAAP)		(208.2)		(155.8)
Free Cash Flow (non-GAAP)	$	526.3	$	560.6

Investing Activities

Cash flows from investing activities consist primarily of cash flows associated with capital expenditures, proceeds from disposals of property, plant and equipment, net sales and maturities (purchases) of short-term investments, and acquisitions. 

Net cash used in investing activities was $350.3 in the first nine months of 2018, compared to $293.0 in the first nine months of 2017.  In the first nine months of 2018, net cash used in investing activities was driven primarily by the use of $158.9 in cash to fund acquisitions, along with capital expenditures (net of disposals) of $204.4, partially offset by net sales and maturities of short-term investments of $13.0.  In the first nine months of 2017, net cash used in investing activities was driven primarily by the use of $243.5 in cash to fund acquisitions, along with capital expenditures (net of disposals) of $153.8, partially offset by net sales and maturities of short-term investments of $104.3. 

Financing Activities

Cash flows from financing activities consist primarily of cash flows associated with borrowings and repayments of the Company’s credit facilities and other long-term debt, repurchases of common stock, proceeds from stock option exercises, dividend payments and purchases of and distributions to shareholders of noncontrolling interests.  

Net cash used in financing activities was $1,068.6 in the first nine months of 2018, compared to $47.7 in the first nine months of 2017.  For the first nine months of 2018, cash used in financing activities was driven primarily by repurchases of the Company’s common stock of $680.2, net repayments of commercial paper and other debt of $308.8, dividend payments of $184.4, and purchases of and distributions to noncontrolling interests of $17.9, partially offset by cash proceeds from the exercise of stock options of $123.0.  For the first nine months of 2017, cash used in financing activities was driven primarily by repurchases of the Company’s common stock of $555.6, the repayment of the 1.55% Senior Notes in September 2017 of $375.0, dividend payments of $147.1, purchases of and distributions to noncontrolling interests of $22.1, and payments of costs related to the issuances of two senior notes of $5.2, partially

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offset by borrowings related to the issuances of two senior notes in April 2017 of $749.3, net borrowings of commercial paper of $173.6, and cash proceeds from the exercise of stock options of $134.4.

The Company has significant flexibility to meet its financial commitments.  The Company uses debt financing to lower the overall cost of capital and increase return on stockholders’ equity.  The Company’s debt financing includes the use of commercial paper programs, revolving credit facility and senior notes as part of its overall cash management strategy.

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 intends to utilize the Revolving Credit Facility for general corporate purposes.  At September 30, 2018, 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, 2018, the Company was in compliance with the financial covenants under the Revolving Credit Facility.

Pursuant to the terms of the commercial paper program, the Company issues short-term unsecured commercial paper notes in one or more private placements in the United States (the “U.S. Commercial Paper Program”).  The amount of U.S. commercial paper notes outstanding (“USCP Notes”) as of September 30, 2018 was $337.9. 

On July 10, 2018, the Company and one of its wholly owned European subsidiaries (the “Euro Issuer”) entered into a euro-commercial paper program (the “Euro Commercial Paper Program” and, together with the U.S. Commercial Paper Program, the “Commercial Paper Programs”) pursuant to which the Euro Issuer may issue short-term unsecured commercial paper notes (the “ECP Notes” and, together with the USCP Notes, the “Commercial Paper”), which are guaranteed by the Company and are to be issued outside of the United States.  The ECP Notes may be issued in Euros, Sterling, U.S. Dollars or other currencies.  The amount of ECP Notes outstanding as of September 30, 2018 was €442.0 (approximately $512.9).

Amounts available under the Commercial Paper Programs are borrowed, repaid and re-borrowed from time to time.  The Company’s Board of Directors’ authorization for the ECP Notes currently limits the maximum aggregate principal amount outstanding of USCP Notes, ECP Notes, and any other commercial paper, euro-commercial paper or similar programs at any time to $2,000.0.  The Commercial Paper Programs are rated A-2 by Standard & Poor’s and P-2 by Moody’s and are currently backstopped by the Revolving Credit Facility, as amounts undrawn under the Company’s existing Revolving Credit Facility are available to repay the Commercial Paper, if necessary.  Net proceeds of the issuances of Commercial Paper are expected to be used for general corporate purposes. The Company reviews its optimal mix of short-term and long-term debt regularly and may replace certain amounts of commercial paper, short-term debt and current maturities of long-term debt with new issuances of long-term debt in the future.

As of September 30, 2018, the Company has outstanding senior notes (the “Senior Notes”) as follows:

Principal		Interest
Amount		Rate		Maturity
$	750.0	2.55	%	January 2019
	400.0	2.20	%	April 2020
	375.0	3.125	%	September 2021
	500.0	4.00	%	February 2022
	350.0	3.20	%	April 2024

The Senior Notes 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, subject to certain terms and conditions.  In September 2017, the Company repaid all of its outstanding $375.0 1.55% Senior Notes that were due September 15, 2017.  The 2.55% Senior Notes are due in January 2019 and are therefore 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 as of September 30, 2018.

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On October 8, 2018, the Euro Issuer issued €500.0 (approximately $574.6) principal amount of unsecured 2.000% Senior Notes due October 8, 2028 at 99.498% of face value (the “2028 Euro Notes”).  The 2028 Euro Notes are unsecured and rank equally in right of payment with the Euro Issuer’s other unsecured senior indebtedness, and are guaranteed on a senior unsecured basis by the Company.  Interest on the 2028 Euro Notes is payable annually on October 8 of each year, commencing on October 8, 2019.  The Company may, at its option, redeem some or all of the 2028 Euro 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 July 8, 2028, a make-whole premium.  The Company used a portion of the net proceeds from the 2028 Euro Notes to repay a portion of the outstanding amounts under its Commercial Paper Programs, with the remainder of the net proceeds being used for general corporate purposes.  In October 2018, the Company incurred approximately $5.0 of costs related to the issuance of the 2028 Euro Notes, which are amortized to interest expense over the respective term of the debt. 

The Company’s Senior Notes and 2028 Euro Notes contain certain financial and non-financial covenants.    Refer to Note 13 of the Condensed Consolidated Financial Statements for further information related to the Company’s debt.

On January 24, 2017, the Company’s Board of Directors authorized a stock repurchase program under which the Company could 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 three months ended March 31, 2018, the Company repurchased 4.2 million shares of its common stock for $382.0 under the 2017 Stock Repurchase Program, bringing total repurchases under this program to approximately 12.6 million shares or $1,000.0, thus completing the 2017 Stock Repurchase Program. 

On April 24, 2018, the Company’s Board of Directors authorized a new stock repurchase program under which the Company may purchase up to $2,000.0 of the Company’s Common Stock during the three-year period ending April 24, 2021 in accordance with the requirements of Rule 10b-18 of the Exchange Act (the “2018 Stock Repurchase Program”).  During the three and nine months ended September 30, 2018, the Company repurchased 0.4 million and 3.5 million shares of its common stock for $34.8 and $298.2, respectively, under the 2018 Stock Repurchase Program. These treasury shares have been retired by the Company, accordingly common stock and retained earnings were reduced.  The Company has not repurchased any additional shares of its common stock through October 24, 2018, and has remaining authorization to purchase up to approximately $1,701.8 of its common stock under the 2018 Stock Repurchase Program.  The price and timing of any future purchases under the 2018 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.  The following table summarizes the declared quarterly dividends per share as well as the dividends declared and paid for the three and nine months ended September 30, 2018 and 2017:

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

On April 24, 2018, the Company’s Board of Directors approved an increase to its quarterly dividend rate from $0.19 to $0.23 per share effective with dividends declared in the second quarter of 2018.

Liquidity and Cash Requirements

The Company’s primary sources of liquidity are internally generated cash flow, the Commercial Paper Programs, the Revolving Credit Facility, and its cash, cash equivalents and short-term investments on hand.  The Company believes that its cash, cash equivalents and short-term investment position on hand, ability to generate future cash flow from operations, availability under its credit facilities, and access to capital markets (including the issuance of the new 2028

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Euro Notes in October 2018) provide adequate liquidity to meet its obligations for the next twelve months, including the repayment of the $750.0 outstanding principal amount of 2.55% Senior Notes due January 2019.

The Company’s primary ongoing cash requirements will be for operating and capital expenditures, product development activities, repurchases of its Common Stock, funding of pension obligations, dividends, debt service (including the repayment of the 2.55% Senior Notes), payments associated with the Transition Tax (which is payable in annual installments until 2025) and taxes due upon the repatriation of foreign earnings (which will be payable upon the repatriation of such earnings).  The Company’s debt service requirements consist primarily of principal and interest on the Senior Notes and the 2028 Euro Notes, the Revolving Credit Facility and the Commercial Paper Programs.  The Company may also use cash to fund all or part of the cost of acquisitions.

Environmental Matters

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.

Non-GAAP Financial Measures

In addition to assessing the Company’s financial condition, results of operations, liquidity and cash flows in accordance with U.S. GAAP, management utilizes certain non-GAAP financial measures defined below as part of its internal reviews for purposes of monitoring, evaluating and forecasting the Company’s financial performance, communicating operating results to the Company’s Board of Directors and assessing related employee compensation measures.  Management believes that these non-GAAP financial measures may be helpful to investors in assessing the Company’s overall financial performance, trends and period-over-period comparative results, in addition to the reasons noted below.  Non-GAAP financial measures related to operating income, operating margin, net income attributable to Amphenol Corporation, effective tax rate and diluted EPS exclude income and expenses that are not directly related to the Company's operating performance during the periods presented.  Items excluded in such non-GAAP financial measures in any period may consist of, without limitation, acquisition-related expenses, refinancing-related costs, and certain discrete tax items including but not limited to (i) the excess tax benefits related to stock-based compensation and (ii) the Tax Act Charge recorded in 2017 and any subsequent adjustments recorded in 2018 related to this charge.  Non-GAAP financial measures related to net sales exclude the impact related to foreign currency exchange and acquisitions.  The non-GAAP financial information contained herein is included for supplemental purposes only and should not be considered in isolation, as a substitute for or superior to the related U.S. GAAP financial measures.  In addition, these non-GAAP financial measures are not necessarily the same or comparable to similar measures presented by other companies, as such measures may be calculated differently or may exclude different items. 

The non-GAAP financial measures defined below should be read in conjunction with the Company’s financial statements presented in accordance with U.S. GAAP.  The reconciliations of these non-GAAP financial measures to the most directly comparable U.S. GAAP financial measures for the three and nine months ended September 30, 2018 and 2017 are included in “Results of Operations” and “Liquidity and Capital Resources” within this Item 2:

· Adjusted Diluted EPS is defined as diluted earnings per share (as reported in accordance with U.S. GAAP), excluding income and expenses and their specific tax effects, that are not directly related to the Company's operating performance during the periods presented.  Adjusted Diluted EPS is calculated as Adjusted Net Income attributable to Amphenol Corporation, as defined below, divided by the weighted average outstanding diluted shares as reported in the Company’s Condensed Consolidated Statements of Income.

· Adjusted Effective Tax Rate is defined as Provision for income taxes, as reported in the Condensed Consolidated Statements of Income, expressed as a percentage of Income before income taxes, as reported in the Condensed Consolidated Statements of Income, each excluding the income and expenses and their specific tax effects that are not directly related to the Company's operating performance during the periods presented.

33

· Adjusted Net Income attributable to Amphenol Corporation is defined as Net income attributable to Amphenol Corporation, as reported in the Condensed Consolidated Statements of Income, excluding income and expenses and their specific tax effects that are not directly related to the Company's operating performance during the periods presented.

· Adjusted Operating Income is defined as Operating income, as reported in the Condensed Consolidated Statements of Income, excluding income and expenses that are not directly related to the Company's operating performance during the periods presented.

· Adjusted Operating Margin is defined as Adjusted Operating Income (as defined above) expressed as a percentage of Net sales (as reported in the Condensed Consolidated Statements of Income).

· Constant Currency Net Sales Growth is defined as the period-over-period percentage change in net sales growth, excluding the impact of changes in foreign currency exchange rates.  Amphenol’s results are subject to volatility related to foreign currency translation fluctuations.  As such, management evaluates the Company’s sales performance based on actual sales growth in U.S. dollars, as well as Organic Net Sales Growth (defined below) and Constant Currency Net Sales Growth, and believes that such information is useful to investors to assess the underlying sales trends.

· Free Cash Flow is defined as Net cash provided by operating activities (“operating cash flow” - as reported in accordance with U.S. GAAP) less capital expenditures (as reported in accordance with U.S. GAAP), both of which are derived from the Company’s Condensed Consolidated Statements of Cash Flow.  Free Cash Flow is an important liquidity measure for the Company, as we believe it is useful for management and investors to assess our ability to generate cash, as well as to assess how much cash can be used to reinvest in the growth of the Company or to return to shareholders through either stock repurchases or dividends.

· Organic Net Sales Growth is defined as the period-over-period percentage change in net sales growth resulting from operating volume and pricing changes, and excludes the impact of 1) changes in foreign currency exchange rates, which directly impact the Company’s operating results and are outside the control of the Company and 2) acquisitions closed since the beginning of the prior calendar year, which were not included in the Company’s results as of the comparable prior year periods and which do not reflect the underlying growth of the Company on a comparative basis.  Management evaluates the Company’s sales performance based on actual sales growth in U.S. dollars, as well as Constant Currency Net Sales Growth (defined above) and Organic Net Sales Growth, and believes that such information is useful to investors to assess the underlying sales trends.  

Critical Accounting Policies and Estimates

The Company’s disclosures of its critical accounting policies, which are contained in its 2017 Annual Report, have not materially changed since that report was filed.  Effective January 1, 2018, the Company’s policies related to revenue recognition have been updated in accordance with Note 3 of the accompanying Condensed Consolidated Financial Statements included in Part I, Item 1 within this Quarterly Report on Form 10-Q.

Item 3.Quantitative and Qualitative Disclosures About Market Risk

The Company, in the normal course of doing business, is exposed to a variety of risks, including market risks associated with foreign currency exchange rates and changes in interest rates.  The Company does not have any significant concentration with any one counterparty.  There has been no material change in the Company’s assessment of its sensitivity to foreign currency exchange rate risk since its presentation set forth in Part II, Item 7A “Quantitative and Qualitative Disclosures About Market Risk” in its 2017 Annual Report.  The Company may borrow under its Revolving Credit Facility and Commercial Paper Programs.  Any borrowings under the new Euro Commercial Paper Program entered into in July 2018 and the new 2028 Euro Notes entered into in October 2018, as discussed in Note 13 of the accompanying Condensed Consolidated Financial Statements, are and may continue to be denominated in foreign currencies, and there can be no assurance that the Company can successfully manage these changes in exchange rates,

34

including in the event of a significant and sudden decline in the value of any of the foreign currencies for which such borrowings are made.In addition, any borrowings under the Revolving Credit Facility either bear interest at or trade at rates that fluctuate with a spread over LIBOR, while any borrowings under the Commercial Paper Programs are subject to floating interest rates.  Therefore, when the Company borrows under these debt instruments, the Company is exposed to market risk from exposure to changes in interest rates.  As of September 30, 2018, there were no outstanding borrowings under the Revolving Credit Facility, while borrowings under the U.S. Commercial Paper Program and Euro Commercial Paper Program were at an average floating rate of 2.36% and (0.13)%, respectively.  The Company does not expect changes in interest rates to have a material effect on income or cash flows in 2018, although there can be no assurances that interest rates will not change significantly.

Item 4.Controls and Procedures

The Company’s management, with the participation of the Company’s Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of the design and operation of our disclosure controls and procedures, pursuant to Rules 13a-15(e) or 15d-15(e) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), as of the end of the period covered by this report.  These controls and procedures are designed to provide reasonable assurance that information required to be disclosed by the Company in reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission rules and forms, and such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.  Based on their evaluation, the Chief Executive Officer and Chief Financial Officer have concluded that the Company’s disclosure controls and procedures were effective as of the end of the period covered by this report. 

Changes in Internal Control Over Financial Reporting

There has been no change in our internal control over financial reporting during the Company’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.  Beginning January 1, 2018, the Company adopted ASU 2014-09, Revenue from Contracts with Customers (Topic 606) and all of its related subsequent amendments.  Although the new revenue recognition standard did not have a material impact on the Condensed Consolidated Financial Statements, the Company implemented changes to our processes related to revenue recognition and the related control activities, including the implementation of certain controls over financial reporting necessary for the required disclosures, as well as the implementation of new policies and any necessary changes to existing related policies.  Refer to Notes 2 and 3 of the accompanying Condensed Consolidated Financial Statements for further discussion on the adoption of this new standard.

35

PART II - OTHER INFORMATION

Item 1.Legal Proceedings

The Company has been named as a defendant in several legal actions arising from normal business activities. 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 has also received a subpoena from the Department of Defense, Office of the Inspector General, requesting documents pertaining to certain products manufactured by the Company’s Military and Aerospace Group that are purchased or used by the U.S. government. The Company is cooperating with the request. The inquiry is in the early stages and the Company is unable to estimate the timing or outcome of the matter.

Item 1A.Risk Factors

There have been no material changes to the Company’s risk factors as disclosed in Part I, Item 1A of the Company’s 2017 Annual Report.

Item 2.Unregistered Sales of Equity Securities and Use of Proceeds

Repurchase of Equity Securities

On April 24, 2018, the Company’s Board of Directors authorized a new stock repurchase program under which the Company may purchase up to $2.0 billion of the Company’s Common Stock during the three-year period ending April 24, 2021 in accordance with the requirements of Rule 10b-18 of the Exchange Act (the “2018 Stock Repurchase Program”).  During the three months ended September 30, 2018, the Company repurchased 0.4 million shares of its common stock for $34.8 million under the 2018 Stock Repurchase Program.  These treasury shares have been retired by the Company, accordingly common stock and retained earnings were reduced.The Company has not repurchased any additional shares of its common stock through October 24, 2018.  The price and timing of any future purchases under the 2018 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.

The table below reflects the Company’s stock repurchases for the three months ended September 30, 2018:

				Total Number of	Maximum Dollar
(dollars in millions, except price per share)				Shares Purchased as	Value of Shares
	Total Number	Average		Part of Publicly	that May Yet be
	of Shares	Price Paid		Announced Plans or	Purchased Under the
Period	Purchased	per Share		Programs	Plans or Programs
July 1 to July 31, 2018	402,205	$	86.53	402,205	$	1,701.8
August 1 to August 31, 2018	—		—	—		1,701.8
September 1 to September 30, 2018	—		—	—		1,701.8
Total	402,205	$	86.53	402,205	$	1,701.8

On January 24, 2017, the Company’s Board of Directors authorized a stock repurchase program under which the Company could purchase up to $1.0 billion 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 three months ended March 31, 2018, the Company repurchased 4.2 million shares of its common stock for $382.0 million under the 2017 Stock Repurchase Program, bringing total repurchases under this program to approximately 12.6 million shares or $1.0 billion, thus completing the 2017 Stock Repurchase Program.

36

Item 3.Defaults Upon Senior Securities

None.

Item 4.Mine Safety Disclosures

Not Applicable.

Item 5.Other Information

None.

Item 6.Exhibits

3.1	Restated Certificate of Incorporation of Amphenol Corporation, dated August 3, 2016 (filed as Exhibit 3.1 to the June 30, 2016 10-Q).*
3.2	Amphenol Corporation, Third Amended and Restated By-Laws dated March 21, 2016 (filed as Exhibit 3.1 to the Form 8-K filed on March 22, 2016).*
4.1	Indenture, dated as of November 5, 2009, between Amphenol Corporation and The Bank of New York Mellon, as trustee (filed as Exhibit 4.1 to the Form 8-K filed on November 5, 2009).*
4.2	Indenture, dated as of October 8, 2018, between Amphenol Technologies Holding GmbH, Amphenol Corporation and The Bank of New York Mellon, as trustee (filed as Exhibit 4.1 to the Form 8-K filed on October 9, 2018).*
4.3	Officers’ Certificate, dated January 26, 2012, establishing the 4.00% Senior Notes due 2022 pursuant to the Indenture (filed as Exhibit 4.2 to the Form 8-K filed on January 26, 2012).*
4.4	Officers’ Certificate, dated January 30, 2014, establishing the 2.55% Senior Notes pursuant to the Indenture (filed as Exhibit 4.2 to the Form 8-K filed on January 30, 2014).*
4.5	Officer’s Certificate, dated September 12, 2014, establishing both the 1.550% Senior Notes due 2017 and the 3.125% Senior Notes due 2021 pursuant to the Indenture (filed as Exhibit 4.2 to the Form 8-K filed on September 12, 2014).*
4.6	Officer’s Certificate, dated April 5, 2017, establishing both the 2.200% Senior Notes due 2020 and the 3.200% Senior Notes due 2024 pursuant to the Indenture (filed as Exhibit 4.2 to the Form 8-K filed on April 5, 2017).*
10.1	2017 Stock Purchase and Option Plan for Key Employees of Amphenol and Subsidiaries (filed as Annex A to the Company’s Definitive Proxy Statement on Schedule 14A for its 2017 Annual Meeting of Stockholders, filed on April 17, 2017).*
10.2	Form of 2017 Stock Option Agreement (filed as Exhibit 10.1 to the Form 8-K filed on May 19, 2017).*
10.3	2009 Stock Purchase and Option Plan for Key Employees of Amphenol and Subsidiaries (filed as Exhibit 10.7 to the June 30, 2009 10-Q).*
10.4	The First Amendment to the 2009 Stock Purchase and Option Plan for Key Employees of Amphenol and Subsidiaries (filed as Exhibit 10.2 to the Form 8-K filed on May 23, 2014).*
10.5	Form of 2009 Non-Qualified Stock Option Grant Agreement dated as of May 20, 2009 (filed as Exhibit 10.8 to the June 30, 2009 10-Q).*
10.6	Form of 2009 Management Stockholders’ Agreement dated as of May 20, 2009 (filed as Exhibit 10.9 to the June 30, 2009 10-Q).*
10.7	Pension Plan for Employees of Amphenol Corporation as amended and restated effective January 1, 2016 (filed as Exhibit 10.6 to the December 31, 2016 10-K).*
10.8	First Amendment to Pension Plan for Employees of Amphenol Corporation as amended and restated effective January 1, 2016, dated November 10, 2016 (filed as Exhibit 10.7 to the December 31, 2016 10-K).*
10.9	Second Amendment to Pension Plan for Employees of Amphenol Corporation as amended and restated effective January 1, 2016, dated October 1, 2016 (filed as Exhibit 10.8 to the December 31, 2016 10-K).*
10.10	Third Amendment to Pension Plan for Employees of Amphenol Corporation as amended and restated effective January 1, 2016, dated December 13, 2016 (filed as Exhibit 10.9 to the December 31, 2016 10-K).*
10.11	Fourth Amendment to Pension Plan for Employees of Amphenol Corporation as amended and restated effective January 1, 2016, dated May 2, 2017 (filed as Exhibit 10.12 to the June 30, 2017 10-Q).*
10.12	Amended and Restated Amphenol Corporation Supplemental Employee Retirement Plan (filed as Exhibit 10.24 to the December 31, 2008 10-K).*
10.13	Amphenol Corporation Directors’ Deferred Compensation Plan (filed as Exhibit 10.11 to the December 31, 1997 10-K).*
10.14	The 2004 Stock Option Plan for Directors of Amphenol Corporation (filed as Exhibit 10.44 to the June 30, 2004 10-Q).*

37

10.15	The Amended 2004 Stock Option Plan for Directors of Amphenol Corporation (filed as Exhibit 10.29 to the June 30, 2008 10-Q).*
10.16	The 2012 Restricted Stock Plan for Directors of Amphenol Corporation dated May 24, 2012 (filed as Exhibit 10.15 to the June 30, 2012 10-Q).*
10.17	2012 Restricted Stock Plan for Directors of Amphenol Corporation Restricted Share Award Agreement dated May 24, 2012 (filed as Exhibit 10.16 to the June 30, 2012 10-Q).*
10.18	2018 Amphenol Corporation Management Incentive Plan (filed as Exhibit 10.19 to the December 31, 2017 10-K).*
10.19	2014 Amphenol Corporation Executive Incentive Plan (filed as Exhibit 10.1 to the Form 8-K filed on May 23, 2014).*
10.20	Credit Agreement, dated as of March 1, 2016, among the Company, certain subsidiaries of the Company, a syndicate of financial institutions and JPMorgan Chase Bank, N.A. acting as the administrative agent (filed as Exhibit 10.1 to the Form 8-K filed on March 2, 2016).*
10.21	Continuing Agreement for Standby Letters of Credit between the Company and Deutsche Bank dated March 4, 2009 (filed as Exhibit 10.36 to the March 31, 2009 10-Q).*
10.22	Third Amendment to The Amphenol Corporation Employee Savings/401(K) Plan Adoption Agreement as amended and restated effective October 1, 2013, dated September 20, 2013 (filed as Exhibit 10.40 to the December 31, 2013 10-K).*
10.23	Amended and Restated Amphenol Corporation Supplemental Defined Contribution Plan (filed as Exhibit 10.30 to the September 30, 2011 10-Q).*
10.24	Amphenol Corporation Supplemental Defined Contribution Plan as amended effective January 1, 2012 (filed as Exhibit 10.34 to the December 31, 2011 10-K).*
10.25	Commercial Paper Program form of Dealer Agreement dated as of August 29, 2014 between the Company, Citibank Global Markets and JP Morgan Securities LLC (filed as Exhibit 10.1 to the Form 8-K filed on September 5, 2014).*
10.26	Commercial Paper Program Dealer Agreement dated as of July 10, 2018 between Amphenol Technologies Holding GmbH (as issuer), Amphenol Corporation (as guarantor), Barclays Bank PLC (as Arranger), and Barclays Bank PLC and Commerzbank Aktiengesellschaft (as Original Dealers) (filed as Exhibit 10.1 to the Form 8-K filed on July 11, 2018).*
10.27	Form of Indemnification Agreement for Directors and Executive Officers (filed as Exhibit 10.27 to the December 31, 2016 10-K).*
10.28	Offer of Employment by and between Amphenol Corporation and Lance E. D’Amico, dated as of June 8, 2016 (filed as Exhibit 10.28 to the March 31, 2018 10-Q).*
31.1	Certification pursuant to Exchange Act Rules 13a-14 and 15d-14, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.**
31.2	Certification pursuant to Exchange Act Rules 13a-14 and 15d-14, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.**
32.1	Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.**
32.2	Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.**
101.INS	XBRL Instance Document.**
101.SCH	XBRL Taxonomy Extension Schema Document.**
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document.**
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document.**
101.LAB	XBRL Taxonomy Extension Label Linkbase Document.**
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document.**

*     Incorporated herein by reference as stated.

**   Filed herewith.

38

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		AMPHENOL CORPORATION
	By:	/s/ Craig A. Lampo
		Craig A. Lampo
		Authorized Signatory
		and Principal Financial Officer
Date: October 26, 2018

39

EX-31.1

EXHIBIT 31.1

Amphenol Corporation

Certification Pursuant to

Section 302 of

the Sarbanes-Oxley Act of 2002

Certification

I, R. Adam Norwitt, as the principal executive officer of the registrant, certify that:

1. I have reviewed this quarterly report on Form 10-Q for the quarter ended September 30, 2018 of Amphenol Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: October 26, 2018

/s/ R. Adam Norwitt

R. Adam Norwitt

President and Chief Executive Officer

EX-31.2

EXHIBIT 31.2

Amphenol Corporation

Certification Pursuant to

Section 302 of

the Sarbanes-Oxley Act of 2002

Certification

I, Craig A. Lampo, as the principal financial officer of the registrant, certify that:

1. I have reviewed this quarterly report on Form 10-Q for the quarter ended September 30, 2018 of Amphenol Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: October 26, 2018

/s/ Craig A. Lampo

Craig A. Lampo

Senior Vice President and Chief Financial Officer

EX-32.1

EXHIBIT 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,  AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the quarterly report of Amphenol Corporation (the “Company”) on Form 10-Q for the quarter ended September 30, 2018, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, R. Adam Norwitt, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: October 26, 2018

/s/ R. Adam Norwitt

R. Adam Norwitt

President and Chief Executive Officer

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to Amphenol Corporation and will be retained by Amphenol Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

EXHIBIT 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,  AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the quarterly report of Amphenol Corporation (the “Company”) on Form 10-Q for the quarter ended September 30, 2018, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Craig A. Lampo, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: October 26, 2018

/s/ Craig A. Lampo

Craig A. Lampo

Senior Vice President and Chief Financial Officer

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to Amphenol Corporation and will be retained by Amphenol Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 24, 2018
Document and Entity Information
Entity Registrant Name	AMPHENOL CORP /DE/
Entity Central Index Key	0000820313
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
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		301,327,138
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Entity Small Business	false
Entity Emerging Growth Company	false

XML

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	$ 998.3	$ 1,719.1
Short-term investments	21.5	34.6
Total cash, cash equivalents and short-term investments	1,019.8	1,753.7
Accounts receivable, less allowance for doubtful accounts of $27.5 and $23.0, respectively	1,737.6	1,598.6
Inventories	1,245.5	1,106.9
Other current assets	278.6	196.8
Total current assets	4,281.5	4,656.0
Property, plant and equipment, less accumulated depreciation of $1,285.6 and $1,200.1, respectively	886.4	816.8
Goodwill	4,113.7	4,042.6
Intangibles, net and other long-term assets	461.0	488.5
Total assets	9,742.6	10,003.9
Current Liabilities:
Accounts payable	1,014.0	875.6
Accrued salaries, wages and employee benefits	161.1	151.6
Accrued income taxes	184.8	154.2
Accrued dividends	69.3	58.1
Other accrued expenses	323.8	338.8
Current portion of long-term debt	790.2	1.1
Total current liabilities	2,543.2	1,579.4
Total long-term debt	2,468.3	3,541.5
Accrued pension and postretirement benefit obligations	171.0	272.0
Deferred income taxes	203.1	241.2
Other long-term liabilities	303.7	326.4
Equity:
Common stock	0.3	0.3
Additional paid-in capital	1,410.1	1,249.0
Retained earnings	2,935.8	2,941.5
Accumulated other comprehensive loss	(337.3)	(201.0)
Total shareholders' equity attributable to Amphenol Corporation	4,008.9	3,989.8
Noncontrolling interests	44.4	53.6
Total equity	4,053.3	4,043.4
Total liabilities and equity	$ 9,742.6	$ 10,003.9

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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
CONDENSED CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowance for doubtful accounts	$ 27.5	$ 23.0
Accumulated depreciation	$ 1,285.6	$ 1,200.1

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CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
CONDENSED CONSOLIDATED STATEMENTS OF INCOME
Net sales	$ 2,129.0	$ 1,840.8	$ 5,977.3	$ 5,067.4
Cost of sales	1,440.8	1,234.7	4,037.4	3,392.8
Gross profit	688.2	606.1	1,939.9	1,674.6
Acquisition-related expenses				4.0
Selling, general and administrative expenses	244.0	228.2	710.6	642.4
Operating income	444.2	377.9	1,229.3	1,028.2
Interest expense	(24.8)	(24.6)	(75.3)	(67.3)
Other income, net	0.2	5.1	2.5	12.9
Income before income taxes	419.6	358.4	1,156.5	973.8
Provision for income taxes	(100.0)	(78.1)	(280.8)	(212.7)
Net income	319.6	280.3	875.7	761.1
Less: Net income attributable to noncontrolling interests	(3.0)	(2.8)	(8.8)	(7.2)
Net income attributable to Amphenol Corporation	$ 316.6	$ 277.5	$ 866.9	$ 753.9
Net income per common share — Basic (in dollars per share)	$ 1.05	$ 0.91	$ 2.87	$ 2.47
Weighted average common shares outstanding — Basic (in shares)	300.5	305.0	301.7	305.8
Net income per common share — Diluted (in dollars per share)	$ 1.01	$ 0.88	$ 2.76	$ 2.39
Weighted average common shares outstanding — Diluted (in shares)	312.4	315.7	313.6	316.1
Dividends declared per share (in dollars per share)	$ 0.23	$ 0.19	$ 0.65	$ 0.51

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 319.6	$ 280.3	$ 875.7	$ 761.1
Total other comprehensive (loss) income, net of tax
Foreign currency translation adjustments	(54.6)	52.1	(154.2)	172.4
Unrealized (loss) gain on cash flow hedges	(0.7)	(0.6)	0.3
Defined benefit plan adjustment, net of tax of ($1.6) and ($4.7) for 2018 and ($2.2) and ($6.7) for 2017, respectively	5.0	4.2	14.9	12.5
Total other comprehensive (loss) income, net of tax	(50.3)	55.7	(139.0)	184.9
Total comprehensive income	269.3	336.0	736.7	946.0
Less: Comprehensive income attributable to noncontrolling interests	(1.4)	(3.6)	(6.1)	(9.3)
Comprehensive income attributable to Amphenol Corporation	$ 267.9	$ 332.4	$ 730.6	$ 936.7

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Defined benefit plan adjustment, tax	$ (1.6)	$ (2.2)	$ (4.7)	$ (6.7)

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOW - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash from operating activities:
Net income	$ 875.7	$ 761.1
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	194.5	168.5
Stock-based compensation expense	40.4	37.1
Deferred income tax benefit	(41.5)	(0.6)
Net change in components of working capital	(246.4)	(252.8)
Net change in accrued pension and postretirement benefits	(77.0)	(0.7)
Net change in other long-term assets and liabilities	(11.2)	3.8
Net cash provided by operating activities	734.5	716.4
Cash from investing activities:
Capital expenditures	(208.2)	(155.8)
Proceeds from disposals of property, plant and equipment	3.8	2.0
Purchases of short-term investments	(35.3)	(36.1)
Sales and maturities of short-term investments	48.3	140.4
Acquisitions, net of cash acquired	(158.9)	(243.5)
Net cash used in investing activities	(350.3)	(293.0)
Cash from financing activities:
Proceeds from issuance of senior notes, net		749.3
Repayments of long-term debt	(8.7)	(375.0)
(Repayments) borrowings under commercial paper programs, net	(300.1)	173.6
Payment of costs related to debt financing	(0.3)	(5.2)
Proceeds from exercise of stock options	123.0	134.4
Distributions to and purchases of noncontrolling interests	(17.9)	(22.1)
Purchase and retirement of treasury stock	(680.2)	(555.6)
Dividend payments	(184.4)	(147.1)
Net cash used in financing activities	(1,068.6)	(47.7)
Effect of exchange rate changes on cash and cash equivalents	(36.4)	41.9
Net change in cash and cash equivalents	(720.8)	417.6
Cash and cash equivalents balance, beginning of period	1,719.1	1,034.6
Cash and cash equivalents balance, end of period	998.3	1,452.2
Cash paid for:
Interest	79.5	78.0
Income taxes	$ 307.7	$ 244.1

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Basis of Presentation and Principles of Consolidation

9 Months Ended

Sep. 30, 2018

Basis of Presentation and Principles of Consolidation

Basis of Presentation and Principles of Consolidation

AMPHENOL CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

(amounts in millions, except share and per share data)

Note 1—Basis of Presentation and Principles of Consolidation

The condensed consolidated balance sheets as of September 30, 2018 and December 31, 2017, the related condensed consolidated statements of income and condensed consolidated statements of comprehensive income for the three and nine months ended September 30, 2018 and 2017, and the related condensed consolidated statements of cash flow for the nine months ended September 30, 2018 and 2017 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, 2018 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, 2017 (the “2017 Annual Report”). 

Deferred income tax benefit and Net change in accrued pension and postretirement benefits have been presented as separate line items within cash from operating activities for the prior period in the Company’s Condensed Consolidated Statements of Cash Flow, in order to conform to the current period presentation, which had no impact on our consolidated results of operations, financial position or cash flows.

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New Accounting Pronouncements

9 Months Ended

Sep. 30, 2018

New Accounting Pronouncements

New Accounting Pronouncements

Note 2—New Accounting Pronouncements

Recently Adopted Accounting Standards

Revenue Recognition

In May 2014, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”, and collectively with its related subsequent amendments, “Topic 606”).  Topic 606 supersedes previous revenue recognition guidance and requires entities to 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.  The Company adopted Topic 606 as of January 1, 2018 using the modified retrospective transition method applied to those contracts which were not completed as of January 1, 2018.  Under this transition method, the Company’s results in the Condensed Consolidated Statements of Income for the three and nine months ended September 30, 2018 are presented under Topic 606, while the comparative results for the three and nine months ended September 30, 2017 were not retrospectively adjusted, as such results were recognized in accordance with the revenue recognition policy discussed under Summary of Significant Accounting Policies in Note 1 of the Company’s 2017 Annual Report.

The vast majority of our sales continue to be recognized when products are shipped from our facilities or delivered to our customers, depending on the respective contractual terms.  For a nominal portion of our contracts where the accounting did change, the adoption of Topic 606 resulted in an increase to the opening balance of retained earnings of approximately $3.2 as of January 1, 2018.  This impact was primarily due to the acceleration of net sales and associated net income related to certain uncompleted contracts for the manufacture of goods with no alternative use and for which we have an enforceable right to payment, including a reasonable profit margin, from the customer for performance completed to date.  For these contracts, we now recognize revenue over time as control of the goods transfers, rather than when the goods are delivered, and title, risk and reward of ownership are passed to the customer, as under previous guidance. 

The adoption of Topic 606 did not have a material impact on our condensed consolidated financial statements as of the adoption date and as of and for the three and nine months ended September 30, 2018.  Refer to Note 3 herein for further discussion regarding revenue recognition and related policies.

Other Recently Adopted Accounting Standards

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 requiring other pension-related costs, such as interest costs, amortization of pension-related costs from prior periods, and the gains or losses on plan assets, to 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.  The Company adopted ASU 2017‑07 in the first quarter of 2018, which did not have a material impact on our consolidated financial statements.

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 adopted ASU 2017‑09 in the first quarter of 2018, which did not have any impact on our consolidated financial statements.

In March 2018, the FASB issued ASU 2018‑05, Income Taxes (Topic 740): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 (“ASU 2018-05”), which addresses the application of U.S. GAAP when preparing the initial accounting for the income tax effects of a change in tax laws or rates.  SEC Staff Accounting Bulletin No. 118 (“SAB 118”) was issued in December 2017 to provide immediate accounting guidance resulting from the enactment of the Tax Cuts and Jobs Act (“Tax Act”) on December 22, 2017.  ASU 2018-05 codifies the guidance of SAB 118 within FASB ASC Topic 740, Income Taxes (“ASC 740”), including guidance allowing for the recognition of provisional amounts in situations where the related accounting is not complete and reasonable estimates can be made at the time that financial statements are issued covering the reporting period that includes the enactment date of the Tax Act, as well as allowing for a measurement period of up to one year from the enactment date to finalize the accounting related to the Tax Act.  Previously, ASC 740 did not directly address incomplete accounting for the effects of a change in tax laws or rates.  The Company followed the guidance under SAB 118 in the fourth quarter of 2017 when the provisional income tax charge (“Tax Act Charge”) associated with the Tax Act was estimated and recorded.  Refer to Note 14 herein for further details regarding the Tax Act.

Accounting Standards Issued But Not Yet Adopted

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-of-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 not recognize a right-of-use asset nor lease liability, but rather to recognize such leases as lease expense, generally on a straight-line basis over the lease term.  In July 2018, the FASB issued ASU 2018-10, Codification Improvements to Topic 842, Leases, which clarified various aspects of the guidance under ASU 2016-02.  ASU 2016‑02 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, with early adoption permitted.  Originally, entities were required to adopt ASU 2016-02 using a modified retrospective approach, which required prior periods to be presented under this new standard.  However, in July 2018, the FASB issued ASU 2018-11,  Leases (Topic 842): Targeted Improvements, which now allows entities the option of recognizing the cumulative effect of applying the new standard as an adjustment to the opening balance of retained earnings in the year of adoption while continuing to present all prior periods under previous lease accounting guidance.  The Company has implemented a new lease management system that will facilitate the adoption of this new standard and ensure all requirements are met for both reporting and disclosure purposes, while we continue to review and implement the necessary changes to our existing policies, processes and controls to ensure compliance.  While the Company continues to evaluate the impact that ASU 2016-02 will have on our consolidated financial statements and related disclosures, the actual impact of the standard will be dependent upon the Company’s lease portfolio at adoption.  ASU 2016-02 also provides various optional practical expedients in transition, which we continue to evaluate.  The Company will adopt ASU 2016-02 in the first quarter of 2019 using the modified retrospective transition approach allowed under ASU 2018-11, and will recognize the cumulative effect of applying the new standard as an adjustment to the opening balance of retained earnings as of January 1, 2019.  Upon adoption, we will recognize a right-of-use asset and a corresponding lease liability for our operating lease commitments on our balance sheet, and will also provide new disclosures about our leasing activities.

In February 2018, the FASB issued ASU 2018-02, Income Statement—Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income (“ASU 2018-02”), which amends the standard on comprehensive income by providing an option for an entity to reclassify stranded tax effects of the Tax Act from accumulated other comprehensive income directly to retained earnings.  The stranded tax effects result from the remeasurement of net deferred tax positions that were originally recorded in comprehensive income but whose remeasurement was reflected in the income statement in 2017.  ASU 2018-02 only applies to the effects of the Tax Act and is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, with early adoption permitted.  ASU 2018-02 may be applied either at the beginning of the period of adoption or on a retrospective basis to any period in which the impacts of the Tax Act are recognized.  The comparative prior periods will not be restated and will continue to be reported under the accounting standards in effect for those periods.  The adoption of ASU 2018-02 will result in the reclassification of the stranded tax effects of the Tax Act from Accumulated other comprehensive loss to Retained earnings on the consolidated balance sheet.  The Company plans to early adopt ASU 2018-02 in the fourth quarter of 2018, as of October 1, 2018, which will not have a material impact on our consolidated financial statements.

In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820):  Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”), which adds, amends and removes certain disclosure requirements related to fair value measurements.  Among other changes, this standard requires certain additional disclosure surrounding Level 3 assets, including changes in unrealized gains or losses in other comprehensive income and certain inputs in those measurements.  ASU 2018-13 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019.  Certain amended or eliminated disclosures in this standard may be adopted early, while certain additional disclosure requirements in this standard can be adopted on its effective date.  In addition, certain changes in the standard require retrospective adoption, while other changes must be adopted prospectively.  The Company is currently evaluating ASU 2018-13 and its impact on our consolidated financial statements. 

In August 2018, the FASB issued ASU 2018-14,  Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20):  Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans (“ASU 2018-14”), which amends the current annual disclosure requirements related to defined benefit pension and other postretirement plans by adding new requirements, removing certain requirements and providing clarification on existing requirements.  ASU 2018-14 does not amend the interim disclosure requirements of existing guidance and is effective for fiscal years ending after December 31, 2020, with early adoption permitted and must be applied on a retrospective basis.  The Company is currently evaluating ASU 2018-14 and its impact on our consolidated financial statements.

The Securities and Exchange Commission has also recently issued several final rules, including but not limited to SEC Final Rule Release No. 33-10532 Disclosure Update and Simplification (“Final Rule”), which amends certain redundant, duplicative, outdated, superseded or overlapping disclosure requirements.  This Final Rule is intended to facilitate disclosure information provided to investors and simplify compliance without significantly impacting the mix of information provided to investors. The amendments also expand the disclosure requirements regarding the analysis of stockholders' equity for interim financial statements, in which entities will be required to present a reconciliation for each period for which a statement of comprehensive income is required to be filed.  While we have not yet adopted the Final Rule which is effective on November 5, 2018, we do not anticipate any material impact to our consolidated financial statements and related disclosures upon adoption.

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Revenue Recognition

9 Months Ended

Sep. 30, 2018

Revenue Recognition

Revenue Recognition

Note 3—Revenue Recognition

Prior to the adoption of Topic 606, the Company’s revenue recognition policy was in accordance with ASC Topic 605, Revenue Recognition.  Effective January 1, 2018, the Company adopted Topic 606 using the modified retrospective transition method, resulting in accounting policy changes surrounding revenue recognition which replaced certain related policies discussed under Critical Accounting Policies and Estimates (in Item 7) and Summary of Significant Accounting Policies (in Note 1) of the Company’s 2017 Annual Report.  The adoption of Topic 606 did not have a material impact on the Company’s condensed consolidated financial statements.  The following is a summary of the Company’s revenue recognition and related accounting policies and disclosures resulting from the adoption of Topic 606.

Revenues consist of product sales to either end customers and their appointed contract manufacturers (including original equipment manufacturers) or to distributors, and the vast majority of our sales are recognized at a point-in-time under the core principle of recognizing revenue when control transfers to the customer.  Revenues are derived from contracts with customers, which in most cases are customer purchase orders that may be governed by master sales agreements.  For each contract, the promise to transfer the control of the products, each of which is individually distinct, is considered to be the identified performance obligation. As part of the consideration promised in each contract, the Company evaluates the customer’s credit risk.  Our contracts do not have any significant financing components, as payment terms are generally due net 30 to 120 days after delivery. Although products are almost always sold at fixed prices, in determining the transaction price, we evaluate whether the price is subject to refund (due to returns) or adjustment (due to volume discounts, rebates, or price concessions) to determine the net consideration we expect to be entitled to. We allocate the transaction price to each distinct product based on its relative standalone selling price. Taxes assessed by governmental authorities and collected from the customer, including but not limited to sales and use taxes and value-added taxes, are not included in the transaction price. 

With limited exceptions, the Company recognizes revenue at the point in time when we ship or deliver the product from our manufacturing facility to our customer, when our customer accepts and has legal title of the goods, and the Company has a present right to payment for such goods.  Based on the respective contract terms, most of our contracts’ revenues are recognized either (i) upon shipment based on free on board (“FOB”) shipping point, (ii) when the product arrives at its destination or (iii) when the product is pulled from consignment inventory.  Less than 5% of our net sales are recognized over time, as the associated contracts relate to the sale of goods with no alternative use as they are only sold to a single customer and whose underlying contract terms provide the Company with an enforceable right to payment, including a reasonable profit margin, for performance completed to date, in the event of customer termination. For the contracts recognized over time, we typically record revenue using the input method, based on the materials and labor costs incurred to date relative to the contract’s total estimated costs.  This method reasonably depicts when and as control of the goods transfers to the customer, since it measures our progress in producing the goods, which is generally commensurate with this transfer of control.  Since we typically invoice our customers at the same time that we satisfy our performance obligations, we do not have significant contract assets or contract liabilities related to our contracts with customers recorded in the Condensed Consolidated Balance Sheets. 

The Company receives customer orders negotiated with multiple delivery dates that may extend across more than one reporting period until the contract is fulfilled, the end of the order period is reached, or a pre-determined maximum order value has been reached.  Orders typically fluctuate from quarter to quarter based on customer demand and general business conditions, and it is generally expected that a substantial portion of our remaining performance obligations will be fulfilled within three months.  Nearly all of our performance obligations are fulfilled within one year.  Since our performance obligations are part of contracts that generally have original durations of one year or less, we have elected not to disclose the aggregate amount of transaction prices associated with unsatisfied or partially unsatisfied performance obligations as of September 30, 2018. 

Sales to Distributors and Resellers

Sales to certain distributors and resellers are made under terms allowing certain price adjustments and limited rights of return of the Company’s products held in their inventory or upon sale to their end customers.  The Company maintains a reserve for unprocessed and estimated future price adjustment claims and returns as a refund liability. The reserve is recorded as a reduction to revenue in the same period that the related revenue is recorded and is calculated based on an analysis of historical claims and returns over a period of time to appropriately account for current pricing and business trends. Similarly, sales returns and allowances are recorded based on historical return rates, as a reduction to revenue with a corresponding reduction to cost of sales for the estimated cost of inventory that is expected to be returned.  These reserves were not significant upon the adoption of Topic 606 nor were they significant in the Condensed Consolidated Balance Sheet as of September 30, 2018.

Warranty

Standard product warranty coverage which provides assurance that our products will conform to the contractually agreed-upon specifications for a limited period from the date of shipment is typically offered, while extended or separately-priced warranty coverage is typically not offered. The warranty claim is generally limited to a credit equal to the purchase price or a promise to repair or replace the product for a specified period of time at no additional charge. We estimate our warranty liability based on historical experience, product history, and current trends, and record warranty expense in cost of sales in the Condensed Consolidated Statements of Income.  Warranty liabilities and related warranty expense have not been and were not significant in the accompanying Condensed Consolidated Financial Statements as of and for the three and nine months ended September 30, 2018.

Shipping and Handling Costs

The Company accounts for shipping and handling activities related to contracts with customers as a cost to fulfill our promise to transfer control of the related product, including any such costs incurred after the customer has obtained control of the goods.  Shipping and handling costs are generally charged to and paid by the majority of our customers as part of the contract.  For a nominal portion of our customer contracts, primarily for certain customers in the broadband communications market (a market primarily in the Cable Products and Solutions segment), such costs are not separately charged to the customers.  Shipping and handling costs are included in Cost of sales in the accompanying Condensed Consolidated Statements of Income.

Contract Assets and Contract Liabilities

The Company records contract assets or contract liabilities depending on the timing of revenue recognition, billings and cash collections on a contract-by-contract basis.  Contract assets represent unbilled receivables, which generally arise when revenue recognized over time exceed amounts billed to customers.  Contract liabilities represent billings or advanced consideration received from customers in excess of revenue recognized to date.  As the Company’s performance obligations are typically less than one year, these amounts are generally recorded as current in the accompanying Condensed Consolidated Balance Sheets within Other current assets or Other accrued expenses as of September 30, 2018.  Contract assets and contract liabilities recorded in the Company’s Condensed Consolidated Balance Sheets were not significant both at the date of adoption and as of September 30, 2018.

Contract Costs

The Company’s policy is to capitalize any incremental costs incurred to obtain a customer contract, only to the extent that such costs are explicitly chargeable to the customer and the benefit associated with the costs is expected to be longer than one year.  Otherwise, such costs are expensed as incurred and recorded within Selling, general and administrative expenses in the accompanying Condensed Consolidated Statements of Income.  Incremental costs to fulfill customer orders, which are mostly comprised of pre-production and set-up costs, are generally capitalized to the extent such costs are contractually guaranteed to be reimbursed by the customer.  Otherwise, such costs are expensed as incurred.  Capitalized contract costs to obtain a contract or to fulfill a contract that are not accounted for under other existing accounting standards are recorded as either other current or long-term assets on the accompanying Condensed Consolidated Balance Sheets, depending on the timing of when the Company expects to recognize the expense, and are generally amortized consistent with the timing of when transfer of control of the related goods occurs.  Such capitalized contract costs were not significant both at the date of adoption and as of September 30, 2018, and the related amortization expense was not significant for the three and nine months ended September 30, 2018.

Disaggregation of Net Sales

The following tables show our net sales disaggregated into categories the Company considers meaningful to depict how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors for the three and nine months ended September 30, 2018:

	Three months ended September 30, 2018
	Interconnect		Cable
	Products and		Products and		Total Reportable
	Assemblies		Solutions		Business Segments
Net sales by:
Sales channel:
End customers and contract manufacturers	$	1,725.9	$	89.0	$	1,814.9
Distributors and resellers		293.4		20.7		314.1
	$	2,019.3	$	109.7	$	2,129.0
Geography:
United States	$	517.9	$	54.1	$	572.0
China		696.9		1.4		698.3
Other foreign locations		804.5		54.2		858.7
	$	2,019.3	$	109.7	$	2,129.0

	Nine months ended September 30, 2018
	Interconnect		Cable
	Products and		Products and		Total Reportable
	Assemblies		Solutions		Business Segments
Net sales by:
Sales channel:
End customers and contract manufacturers	$	4,828.9	$	242.8	$	5,071.7
Distributors and resellers		830.6		75.0		905.6
	$	5,659.5	$	317.8	$	5,977.3
Geography:
United States	$	1,519.5	$	155.8	$	1,675.3
China		1,760.0		3.3		1,763.3
Other foreign locations		2,380.0		158.7		2,538.7
	$	5,659.5	$	317.8	$	5,977.3

Net sales by geographic area are based on the customer location to which the product is shipped.

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Inventories

9 Months Ended

Sep. 30, 2018

Inventories

Inventories

Note 4—Inventories

Inventories consist of:

	September 30,		December 31,
	2018		2017
Raw materials and supplies	$	437.2	$	386.2
Work in process		377.7		358.0
Finished goods		430.6		362.7
	$	1,245.5	$	1,106.9

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Reportable Business Segments

9 Months Ended

Sep. 30, 2018

Reportable Business Segments

Reportable Business Segments

Note 5—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 herein and in Note 1 of the notes to the consolidated financial statements in the Company’s 2017 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, 2018 and 2017 are as follows:

	Interconnect Products				Cable Products				Total Reportable
	and Assemblies				and Solutions				Business Segments
Three Months Ended September 30:	2018		2017		2018		2017		2018		2017
Net sales:
External	$	2,019.3	$	1,731.5	$	109.7	$	109.3	$	2,129.0	$	1,840.8
Intersegment		3.8		2.7		8.1		10.9		11.9		13.6
Segment operating income		458.1		388.3		14.4		14.3		472.5		402.6
Nine Months Ended September 30:
Net sales:
External	$	5,659.5	$	4,754.3	$	317.8	$	313.1	$	5,977.3	$	5,067.4
Intersegment		9.6		6.9		25.1		31.5		34.7		38.4
Segment operating income		1,268.9		1,060.8		40.4		44.0		1,309.3		1,104.8

A reconciliation of segment operating income to consolidated income before income taxes for the three and nine months ended September 30, 2018 and 2017 is summarized as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Segment operating income	$	472.5	$	402.6	$	1,309.3	$	1,104.8
Interest expense		(24.8)		(24.6)		(75.3)		(67.3)
Other income, net		0.2		5.1		2.5		12.9
Stock-based compensation expense		(14.4)		(12.6)		(40.4)		(37.1)
Acquisition-related expenses		—		—		—		(4.0)
Other operating expenses		(13.9)		(12.1)		(39.6)		(35.5)
Income before income taxes	$	419.6	$	358.4	$	1,156.5	$	973.8

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Shareholders' Equity and Noncontrolling Interests

9 Months Ended

Sep. 30, 2018

Shareholders' Equity and Noncontrolling Interests

Shareholders' Equity and Noncontrolling Interests

Note 6—Shareholders’ 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, 2018 is as follows:

	Amphenol Corporation Shareholders
								Accumulated
	Common Stock							Other
	Shares			Additional		Retained		Comprehensive		Treasury		Noncontrolling		Total
	(in millions)	Amount		Paid-In Capital		Earnings		Loss		Stock		Interests		Equity
Balance as of December 31, 2017	305.7	$	0.3	$	1,249.0	$	2,941.5	$	(201.0)	$	—	$	53.6	$	4,043.4
Cumulative effect of adoption of revenue recognition standard (Note 2)							3.2								3.2
Net income							866.9						8.8		875.7
Other comprehensive loss									(136.3)				(2.7)		(139.0)
Acquisitions resulting in noncontrolling interest													0.3		0.3
Purchase of noncontrolling interest					(2.3)								(5.4)		(7.7)
Distributions to shareholders of noncontrolling interests													(10.2)		(10.2)
Purchase of treasury stock											(680.2)				(680.2)
Retirement of treasury stock	(7.7)						(680.2)				680.2				—
Stock options exercised	3.3				123.0										123.0
Dividends declared							(195.6)								(195.6)
Stock-based compensation expense					40.4										40.4
Balance as of September 30, 2018	301.3	$	0.3	$	1,410.1	$	2,935.8	$	(337.3)	$	—	$	44.4	$	4,053.3

A rollforward of consolidated changes in equity for the nine months ended September 30, 2017 is as follows:

	Amphenol Corporation Shareholders
								Accumulated
	Common Stock							Other
	Shares			Additional		Retained		Comprehensive		Treasury		Noncontrolling		Total
	(in millions)	Amount		Paid-In Capital		Earnings		Loss		Stock		Interests		Equity
Balance as of December 31, 2016	308.3	$	0.3	$	1,020.9	$	3,122.7	$	(469.0)	$	—	$	48.2	$	3,723.1
Net income							753.9						7.2		761.1
Other comprehensive income									182.8				2.1		184.9
Acquisitions resulting in noncontrolling interest													1.2		1.2
Purchase of noncontrolling interest					(5.5)								(9.5)		(15.0)
Distributions to shareholders of noncontrolling interests													(7.1)		(7.1)
Purchase of treasury stock											(555.6)				(555.6)
Retirement of treasury stock	(7.7)						(555.6)				555.6				—
Stock options exercised	4.4				135.3										135.3
Dividends declared							(155.7)								(155.7)
Stock-based compensation expense					37.1										37.1
Balance as of September 30, 2017	305.0	$	0.3	$	1,187.8	$	3,165.3	$	(286.2)	$	—	$	42.1	$	4,109.3

On January 24, 2017, the Company’s Board of Directors authorized a stock repurchase program under which the Company could 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 three months ended March 31, 2018, the Company repurchased 4.2 million shares of its common stock for $382.0 under the 2017 Stock Repurchase Program, bringing total repurchases under this program to approximately 12.6 million shares or $1,000.0, thus completing the 2017 Stock Repurchase Program. 

On April 24, 2018, the Company’s Board of Directors authorized a new stock repurchase program under which the Company may purchase up to $2,000.0 of the Company’s Common Stock during the three-year period ending April 24, 2021 in accordance with the requirements of Rule 10b-18 of the Exchange Act (the “2018 Stock Repurchase Program”).  During the three and nine months ended September 30, 2018, the Company repurchased 0.4 million and 3.5 million shares of its common stock for $34.8 and $298.2, respectively, under the 2018 Stock Repurchase Program.  These treasury shares have been retired by the Company, accordingly common stock and retained earnings were reduced.  The Company has not repurchased any additional shares of its common stock through October 24, 2018, and has remaining authorization to purchase up to approximately $1,701.8 of its common stock under the 2018 Stock Repurchase Program. The price and timing of any future purchases under the 2018 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.  The following table summarizes the declared quarterly dividends per share as well as the dividends declared and paid for the three and nine months ended September 30, 2018 and 2017: 

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

On April 24, 2018, the Company’s Board of Directors approved an increase to its quarterly dividend rate from $0.19 to $0.23 per share effective with dividends declared in the second quarter of 2018.

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Earnings Per Share

9 Months Ended

Sep. 30, 2018

Earnings Per Share

Earnings Per Share

Note 7—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, 2018 and 2017 is as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(dollars and shares in millions, except per share data)	2018		2017		2018		2017
Net income attributable to Amphenol Corporation shareholders	$	316.6	$	277.5	$	866.9	$	753.9
Basic weighted average common shares outstanding		300.5		305.0		301.7		305.8
Effect of dilutive stock options		11.9		10.7		11.9		10.3
Diluted weighted average common shares outstanding		312.4		315.7		313.6		316.1
Earnings per share attributable to Amphenol Corporation shareholders:
Basic	$	1.05	$	0.91	$	2.87	$	2.47
Diluted	$	1.01	$	0.88	$	2.76	$	2.39

Excluded from the computations above were anti-dilutive common shares of 6.1 million and 5.3 million for the three months ended September 30, 2018 and 2017, respectively, and 2.5 million and 2.1 million for the nine months ended September 30, 2018 and 2017, respectively.

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2018

Commitments and Contingencies

Commitments and Contingencies

Note 8—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.

The Company has also received a subpoena from the Department of Defense, Office of the Inspector General, requesting documents pertaining to certain products manufactured by the Company’s Military and Aerospace Group that are purchased or used by the U.S. government. The Company is cooperating with the request. The inquiry is in the early stages and the Company is unable to estimate the timing or outcome of the matter.

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.

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Stock-Based Compensation

9 Months Ended

Sep. 30, 2018

Stock-Based Compensation

Stock-Based Compensation

Note 9—Stock-Based Compensation

For the three months ended September 30, 2018 and 2017, the Company’s income before income taxes was reduced for stock-based compensation expense of $14.4 and $12.6, respectively.  In addition, for the three months ended September 30, 2018 and 2017, the Company recognized aggregate income tax benefits associated with stock-based compensation of $8.9 and $19.5, respectively, in the provision for income taxes in the accompanying Condensed Consolidated Statements of Income, which include the excess tax benefits from option exercises of $7.0 and $16.6, respectively.  For the nine months ended September 30, 2018 and 2017, the Company’s income before income taxes was reduced for stock-based compensation expense of $40.4 and $37.1, respectively.  In addition, for the nine months ended September 30, 2018 and 2017, the Company recognized aggregate income tax benefits associated with stock-based compensation of $19.7 and $54.7, respectively, which include the excess tax benefits from option exercises of $14.1 and $45.8, respectively. The impact associated with recognizing excess tax benefits from option exercises in the provision for income taxes 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.

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 plans is included in Selling, general and administrative expenses 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”).  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, 2018, there were 17,002,620 shares of Common Stock available for the granting of additional stock options under 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”).  No additional stock options will be granted under the 2009 Employee Option Plan.  The 2000 Stock Purchase and Option Plan for Key Employees of Amphenol and Subsidiaries, as amended, expired in May 2011 and all options granted thereunder have been either exercised or forfeited.  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. 

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.  The 2004 Directors Option Plan expired in May 2014, except that its terms continue with respect to outstanding options granted thereunder.  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, 2018 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, 2018	33,222,364	$	52.27	7.05	$	1,180.3
Options granted	—
Options exercised	(602,549)
Options forfeited	(32,240)
Options outstanding at March 31, 2018	32,587,575		52.58	6.84		1,093.2
Options granted	6,111,100
Options exercised	(740,046)
Options forfeited	(116,740)
Options outstanding at June 30, 2018	37,841,889		58.50	7.15		1,089.4
Options granted	91,000
Options exercised	(1,952,700)
Options forfeited	(226,020)
Options outstanding at September 30, 2018	35,754,169	$	59.68	7.05	$	1,227.9
Vested and non-vested options expected to vest at September 30, 2018	33,489,508	$	58.93	6.97	$	1,175.0
Exercisable options at September 30, 2018	16,426,149	$	46.22	5.55	$	785.2

A summary of the status of the Company’s non-vested options as of September 30, 2018 and changes during the three and nine months then ended is as follows:

		Weighted
		Average
		Fair Value at
	Options	Grant Date
Non-vested options at January 1, 2018	19,600,440	$	8.29
Options granted	—		—
Options vested	(67,400)		8.13
Options forfeited	(32,240)		8.56
Non-vested options at March 31, 2018	19,500,800		8.29
Options granted	6,111,100		12.82
Options vested	(5,923,180)		8.35
Options forfeited	(116,740)		8.18
Non-vested options at June 30, 2018	19,571,980		9.69
Options granted	91,000		12.82
Options vested	(108,940)		8.40
Options forfeited	(226,020)		9.48
Non-vested options at September 30, 2018	19,328,020	$	9.71

During the three and nine months ended September 30, 2018 and 2017, the following activity occurred under the Company’s option plans:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Total intrinsic value of stock options exercised	$	111.8	$	77.0	$	181.1	$	191.1
Total fair value of stock options vested		0.9		0.7		50.9		46.2

As of September 30, 2018, the total compensation cost related to non-vested options not yet recognized was approximately $152.8 with a weighted average expected amortization period of 3.57 years.

The grant-date fair value of each option grant under 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, 2018, the number of restricted shares available for grant under the 2012 Directors Restricted Stock Plan was 109,695.  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, 2018 was as follows:

				Weighted Average
				Remaining
	Restricted	Fair Value at		Amortization
	Shares	Grant Date		Term (in years)
Restricted shares outstanding at January 1, 2018	12,905	$	73.25	0.37
Restricted shares granted	—		—
Restricted shares outstanding at March 31, 2018	12,905		73.25	0.13
Shares vested and issued	(13,046)		73.35
Restricted shares granted	14,469		87.93
Restricted shares outstanding at June 30, 2018	14,328		87.98	0.88
Restricted shares granted	—		—
Restricted shares outstanding at September 30, 2018	14,328	$	87.98	0.63

As of September 30, 2018, the total compensation cost related to non-vested restricted shares not yet recognized was approximately $0.8 with a weighted average expected amortization period of 0.63 years.

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Benefit Plans and Other Postretirement Benefits

9 Months Ended

Sep. 30, 2018

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, 2018 and 2017: 

					Other Postretirement
	Pension Benefits				Benefits
Three Months Ended September 30:	2018		2017		2018		2017
Service cost	$	1.8	$	2.5	$	—	$	—
Interest cost		4.9		5.0		0.1		0.1
Expected return on plan assets		(9.6)		(7.8)		—		—
Amortization of prior service cost		0.6		0.7		—		—
Amortization of net actuarial losses		5.8		5.8		0.1		0.2
Net pension expense	$	3.5	$	6.2	$	0.2	$	0.3
Nine Months Ended September 30:
Service cost	$	5.6	$	7.3	$	—	$	—
Interest cost		14.7		14.9		0.3		0.3
Expected return on plan assets		(28.9)		(23.2)		—		—
Amortization of prior service cost		1.8		2.1		—		—
Amortization of net actuarial losses		17.5		17.2		0.3		0.5
Net pension expense	$	10.7	$	18.3	$	0.6	$	0.8

As a result of the adoption of ASU 2017‑07, the Company records service costs in the same line item as the respective employee compensation costs and within operating income, while all other pension-related costs including interest cost, expected return on plan assets, amortization of prior service cost and amortization of net actuarial losses are reported separately within Other income, net in the Condensed Consolidated Statements of Income. 

In January 2018, the Company made a voluntary cash contribution of approximately $81.0 to fully fund the U.S. Plans, and estimates that, based on current actuarial calculations, cash contributions to the Plans will aggregate approximately $90.0 in 2018.  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.  This voluntary cash contribution made in the first quarter of 2018 is reflected as cash used in operating activities within Net change in accrued pension and postretirement benefits in the Condensed Consolidated Statements of Cash Flow.

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 the U.S. defined contribution plans with cash contributions up to a maximum of 5% of eligible compensation.  During the nine months ended September 30, 2018 and 2017, the Company provided matching contributions to the U.S. defined contribution plans of approximately $6.2 and $5.0, respectively.

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Acquisitions

9 Months Ended

Sep. 30, 2018

Acquisitions

Acquisitions

Note 11—Acquisitions

In the past twelve months, the Company has completed several acquisitions, including three acquisitions which closed in the first nine months of 2018, all in the Interconnect Products and Assemblies segment.  The Company 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 acquisitions were not material to the Company either individually or in the aggregate.

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.  Such acquisition-related expenses are separately presented in the accompanying Condensed Consolidated Statements of Income.

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Goodwill and Other Intangible Assets

9 Months Ended

Sep. 30, 2018

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, 2017	$	3,896.1	$	146.5	$	4,042.6
Acquisition-related		126.5		—		126.5
Foreign currency translation		(55.4)		—		(55.4)
Goodwill at September 30, 2018	$	3,967.2	$	146.5	$	4,113.7

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 2018, 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.   There has been no goodwill impairment in 2018, 2017 or 2016 in connection with our impairment tests.

Other than goodwill noted above, the Company’s intangible assets as of September 30, 2018 and December 31, 2017 were as follows:

		September 30, 2018						December 31, 2017
	Weighted	Gross				Net		Gross				Net
	Average	Carrying		Accumulated		Carrying		Carrying		Accumulated		Carrying
	Life (years)	Amount		Amortization		Amount		Amount		Amortization		Amount
Customer relationships	10	$	400.2	$	226.2	$	174.0	$	398.1	$	199.8	$	198.3
Proprietary technology	11		107.5		58.1		49.4		107.5		50.7		56.8
Backlog and other	2		34.0		33.7		0.3		34.0		33.6		0.4
Total intangible assets (definite-lived)	10		541.7		318.0		223.7		539.6		284.1		255.5
Trade names (indefinite-lived)			186.1		—		186.1		186.1		—		186.1
		$	727.8	$	318.0	$	409.8	$	725.7	$	284.1	$	441.6

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, 2018 and 2017 was approximately $11.6 and $12.3,  respectively. The amortization expense for the nine months ended September 30, 2018 and 2017 was approximately $35.4 and $36.4, respectively.  As of September 30, 2018, amortization expense relating to the Company’s current intangible assets estimated for the remainder of 2018 is approximately $11.5 and for each of the next five fiscal years is approximately $42.7 in 2019,  $37.1 in 2020,  $32.4 in 2021,  $24.9 in 2022 and $22.2 in 2023.

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 2018, 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 has been no impairment in 2018, 2017 or 2016 as a result of such reviews.

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Debt

9 Months Ended

Sep. 30, 2018

Debt

Debt

Note 13—Debt

The Company’s debt (net of any unamortized discount) consists of the following:

	September 30, 2018				December 31, 2017
	Carrying		Approximate		Carrying		Approximate
	Amount		Fair Value		Amount		Fair Value
Revolving Credit Facility	$	—	$	—	$	—	$	—
U.S. Commercial Paper Program		337.9		337.9		1,175.4		1,175.4
Euro Commercial Paper Program		512.9		512.9		—		—
2.55% Senior Notes due January 2019		749.9		749.5		749.8		752.8
2.20% Senior Notes due April 2020		399.8		393.6		399.8		398.0
3.125% Senior Notes due September 2021		374.9		371.4		374.8		381.2
4.00% Senior Notes due February 2022		499.6		506.9		499.5		522.5
3.20% Senior Notes due April 2024		349.7		335.7		349.6		351.9
Notes payable to foreign banks and other debt		43.6		43.6		6.6		6.6
Less unamortized deferred debt issuance costs		(9.8)		—		(12.9)		—
Total debt		3,258.5		3,251.5		3,542.6		3,588.4
Less current portion		790.2		789.8		1.1		1.1
Total long-term debt	$	2,468.3	$	2,461.7	$	3,541.5	$	3,587.3

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, 2018, there were no borrowings under the Revolving Credit Facility.  The carrying value of any borrowings under the Revolving Credit Facility would approximate their fair value due primarily to their market interest rates and would be classified as Level 2 in the fair value hierarchy (Note 15).  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, 2018, the Company was in compliance with the financial covenants under the Revolving Credit Facility.

Commercial Paper Programs

The Company has a commercial paper program pursuant to which the Company issues short-term unsecured commercial paper notes (“U.S. Commercial Paper” or “USCP Notes”) in one or more private placements in the United States (the “U.S. Commercial Paper Program”).  The maturities of the USCP Notes vary, but may not exceed 397 days from the date of issue.  The USCP Notes are 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 bear varying interest rates on a fixed or floating basis.  The average interest rate on the U.S. Commercial Paper as of September 30, 2018 was 2.36%. 

On July 10, 2018, the Company and one of its wholly owned European subsidiaries (the “Euro Issuer”) entered into a euro-commercial paper program (the “Euro Commercial Paper Program” and, together with the U.S. Commercial Paper Program, the “Commercial Paper Programs”) pursuant to which the Euro Issuer may issue short-term unsecured commercial paper notes (the “ECP Notes” and, together with the USCP Notes, “Commercial Paper”), which are guaranteed by the Company and are to be issued outside of the United States.  The maturities of the ECP Notes will vary, but may not exceed 183 days from the date of issue.  The ECP Notes are sold under customary terms in the euro-commercial paper market and may be issued at par or a discount therefrom or a premium thereto and bear varying interest rates on a fixed or floating basis.  The ECP Notes may be issued in Euros, Sterling, U.S. Dollars or other currencies.   As of September 30, 2018, the amount of ECP Notes outstanding was €442.0 (approximately $512.9), with an average interest rate of (0.13)%. 

 Amounts available under the Commercial Paper Programs may be borrowed, repaid and re-borrowed from time to time. The Company’s Board of Directors’ authorization for the ECP Notes currently limits the maximum aggregate principal amount outstanding of USCP Notes, ECP Notes, and any other commercial paper, euro-commercial paper or similar programs at any time to $2,000.0.  The Commercial Paper Programs are rated A-2 by Standard & Poor’s and P-2 by Moody’s and are currently backstopped by the Revolving Credit Facility, as amounts undrawn under the Company’s existing Revolving Credit Facility are available to repay Commercial Paper, if necessary.  Net proceeds of the issuances of the Commercial Paper are expected to be used for general corporate purposes.  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 15).  The carrying value of Commercial Paper borrowings approximates their fair value.   

U.S. Senior Notes

All of the Company’s outstanding senior notes in the United States (“U.S. 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 U.S. Senior Notes is payable semiannually. The Company may, at its option, redeem some or all of any series of U.S. 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 U.S. 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 15).  The 2.55% Senior Notes are due in January 2019 and are therefore 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 as of September 30, 2018.  The U.S. Senior Notes contain certain financial and non-financial covenants.  At September 30, 2018, the Company was in compliance with the financial covenants under its U.S. Senior Notes.

During the first nine months of 2017, the Company issued two senior notes, aggregating $750.0 principal amount of unsecured notes, and incurred approximately $5.2 of costs related to the issuances of these senior notes, which costs are amortized to interest expense over the respective terms of the debt.  In September 2017, the Company used the net proceeds from these senior notes to repay all of its outstanding $375.0 principal amount of 1.55% Senior Notes that were due September 15, 2017, with the remainder of the net proceeds being used for general corporate purposes.  The cash flow impact associated with both the issuances of these senior notes and the repayment of the 1.55% Senior Notes during the first nine months of 2017 is reflected within cash flows from financing activities within the accompanying Condensed Consolidated Statements of Cash Flow.

Euro Senior Notes

On October 8, 2018, the Euro Issuer issued €500.0 (approximately $574.6) principal amount of unsecured 2.000% Senior Notes due October 8, 2028 at 99.498% of face value (the “2028 Euro Notes”).  The 2028 Euro Notes are unsecured and rank equally in right of payment with the Euro Issuer’s other unsecured senior indebtedness, and are guaranteed on a senior unsecured basis by the Company.  Interest on the 2028 Euro Notes is payable annually on October 8 of each year, commencing on October 8, 2019.  The Company may, at its option, redeem some or all of the 2028 Euro 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 July 8, 2028, a make-whole premium.  The Company used a portion of the net proceeds from the 2028 Euro Notes to repay a portion of the outstanding amounts under its Commercial Paper Programs, with the remainder of the net proceeds being used for general corporate purposes.  The 2028 Euro Notes contain certain financial and non-financial covenants.

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Income Taxes

9 Months Ended

Sep. 30, 2018

Income Taxes

Income Taxes

Note 14—Income Taxes

	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
Provision for income taxes	$	(100.0)		$	(78.1)		$	(280.8)		$	(212.7)
Effective tax rate		23.8	%		21.8	%		24.3	%		21.8	%

For the three months ended September 30, 2018 and 2017, stock option exercise activity had the impact of lowering our Provision for income taxes by approximately $7.0 and $16.6, respectively, and lowering our effective tax rate by approximately 170 basis points and 470 basis points, respectively, due to the recognition of excess tax benefits within Provision for income taxes in the accompanying Condensed Consolidated Statements of Income.  For the nine months ended September 30, 2018 and 2017, stock option exercise activity had the impact of lowering our Provision for income taxes by approximately $14.1 and $45.8, respectively, and lowering our effective tax rate by approximately 120 basis points and 470 basis points, respectively.

On December 22, 2017, the United States federal government enacted the Tax Cuts and Jobs Act (“Tax Act”), marking a change from a worldwide tax system to a modified territorial tax system in the United States.  As part of this change, the Tax Act, among other changes, provides for a transition tax on the accumulated unremitted foreign earnings and profits of the Company’s foreign subsidiaries (“Transition Tax”) and a reduction of the U.S. federal corporate income tax rate from 35% to 21%.  In the fourth quarter of 2017, the Company recorded an income tax charge of $398.5 (“Tax Act Charge”) that was comprised of (i) the Transition Tax of $259.4, (ii) a charge of $176.6 related to changes in the Company’s permanent reinvestment assertion with regards to prior accumulated unremitted earnings from certain foreign subsidiaries, partially offset by (iii) a tax benefit of $37.5 associated with the remeasurement of the Company’s U.S. net deferred tax liabilities due to the U.S. federal corporate tax rate reduction.  These three components were provisional amounts recorded in accordance with Staff Accounting Bulletin No. 118 (“SAB 118”) (now codified in ASU 2018-05), which addresses the application of U.S. GAAP in situations where a registrant does not have the necessary information available, prepared, or analyzed in reasonable detail to complete the accounting for certain income tax effects of the Tax Act.  Due to the timing of the Tax Act’s enactment and the complexity of its provisions, the Company has not completed its accounting for the impact of the Tax Act.  The Company continues to analyze guidance and technical interpretations of the provisions of the Tax Act, as well as refine, analyze and update the underlying data, computations and assumptions used to prepare these provisional amounts.  The Company did not make any adjustments to the Tax Act Charge in the first nine months of 2018.  In accordance with ASU 2018-05, the Company will complete its accounting for the income tax effects of the Tax Act within the one-year measurement period in 2018 once the Company has obtained, prepared and fully analyzed all the necessary information related to all three components of the Tax Act Charge recorded in the fourth quarter of 2017.  The Company will pay the Transition Tax, net of applicable tax credits and deductions, in annual installments until 2025, as permitted under the Tax Act.  The Company paid its first annual installment of the Transition Tax of approximately $18.0 in the second quarter of 2018.

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, 2018, the amount of the liability for unrecognized tax benefits, including penalties and interest, which if recognized would impact the effective tax rate, was approximately $125.9, 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 $15.5.

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Fair Value Measurements

9 Months Ended

Sep. 30, 2018

Fair Value Measurements

Fair Value Measurements

Note 15—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 for 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,  2018 and December 31, 2017 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, 2018:
Short-term investments	$	21.5	$	21.5	$	—	$	—
Forward contracts		2.5		—		2.5		—
Total	$	24.0	$	21.5	$	2.5	$	—
December 31, 2017:
Short-term investments	$	34.6	$	34.6	$	—	$	—
Forward contracts		2.3		—		2.3		—
Total	$	36.9	$	34.6	$	2.3	$	—

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 amounts 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, 2018 and 2017 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.

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Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2018

Revenue Recognition

Schedule of disaggregation of net sales

	Three months ended September 30, 2018
	Interconnect		Cable
	Products and		Products and		Total Reportable
	Assemblies		Solutions		Business Segments
Net sales by:
Sales channel:
End customers and contract manufacturers	$	1,725.9	$	89.0	$	1,814.9
Distributors and resellers		293.4		20.7		314.1
	$	2,019.3	$	109.7	$	2,129.0
Geography:
United States	$	517.9	$	54.1	$	572.0
China		696.9		1.4		698.3
Other foreign locations		804.5		54.2		858.7
	$	2,019.3	$	109.7	$	2,129.0

	Nine months ended September 30, 2018
	Interconnect		Cable
	Products and		Products and		Total Reportable
	Assemblies		Solutions		Business Segments
Net sales by:
Sales channel:
End customers and contract manufacturers	$	4,828.9	$	242.8	$	5,071.7
Distributors and resellers		830.6		75.0		905.6
	$	5,659.5	$	317.8	$	5,977.3
Geography:
United States	$	1,519.5	$	155.8	$	1,675.3
China		1,760.0		3.3		1,763.3
Other foreign locations		2,380.0		158.7		2,538.7
	$	5,659.5	$	317.8	$	5,977.3

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Inventories (Tables)

9 Months Ended

Sep. 30, 2018

Inventories

Schedule of Inventories

	September 30,		December 31,
	2018		2017
Raw materials and supplies	$	437.2	$	386.2
Work in process		377.7		358.0
Finished goods		430.6		362.7
	$	1,245.5	$	1,106.9

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Reportable Business Segments (Tables)

9 Months Ended

Sep. 30, 2018

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:	2018		2017		2018		2017		2018		2017
Net sales:
External	$	2,019.3	$	1,731.5	$	109.7	$	109.3	$	2,129.0	$	1,840.8
Intersegment		3.8		2.7		8.1		10.9		11.9		13.6
Segment operating income		458.1		388.3		14.4		14.3		472.5		402.6
Nine Months Ended September 30:
Net sales:
External	$	5,659.5	$	4,754.3	$	317.8	$	313.1	$	5,977.3	$	5,067.4
Intersegment		9.6		6.9		25.1		31.5		34.7		38.4
Segment operating income		1,268.9		1,060.8		40.4		44.0		1,309.3		1,104.8

Schedule of the reconciliation of segment operating income to consolidated income before income taxes

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Segment operating income	$	472.5	$	402.6	$	1,309.3	$	1,104.8
Interest expense		(24.8)		(24.6)		(75.3)		(67.3)
Other income, net		0.2		5.1		2.5		12.9
Stock-based compensation expense		(14.4)		(12.6)		(40.4)		(37.1)
Acquisition-related expenses		—		—		—		(4.0)
Other operating expenses		(13.9)		(12.1)		(39.6)		(35.5)
Income before income taxes	$	419.6	$	358.4	$	1,156.5	$	973.8

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Shareholders' Equity and Noncontrolling Interests (Tables)

9 Months Ended

Sep. 30, 2018

Shareholders' Equity and Noncontrolling Interests

Rollforward of consolidated changes in equity

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

	Amphenol Corporation Shareholders
								Accumulated
	Common Stock							Other
	Shares			Additional		Retained		Comprehensive		Treasury		Noncontrolling		Total
	(in millions)	Amount		Paid-In Capital		Earnings		Loss		Stock		Interests		Equity
Balance as of December 31, 2017	305.7	$	0.3	$	1,249.0	$	2,941.5	$	(201.0)	$	—	$	53.6	$	4,043.4
Cumulative effect of adoption of revenue recognition standard (Note 2)							3.2								3.2
Net income							866.9						8.8		875.7
Other comprehensive loss									(136.3)				(2.7)		(139.0)
Acquisitions resulting in noncontrolling interest													0.3		0.3
Purchase of noncontrolling interest					(2.3)								(5.4)		(7.7)
Distributions to shareholders of noncontrolling interests													(10.2)		(10.2)
Purchase of treasury stock											(680.2)				(680.2)
Retirement of treasury stock	(7.7)						(680.2)				680.2				—
Stock options exercised	3.3				123.0										123.0
Dividends declared							(195.6)								(195.6)
Stock-based compensation expense					40.4										40.4
Balance as of September 30, 2018	301.3	$	0.3	$	1,410.1	$	2,935.8	$	(337.3)	$	—	$	44.4	$	4,053.3

A rollforward of consolidated changes in equity for the nine months ended September 30, 2017 is as follows:

	Amphenol Corporation Shareholders
								Accumulated
	Common Stock							Other
	Shares			Additional		Retained		Comprehensive		Treasury		Noncontrolling		Total
	(in millions)	Amount		Paid-In Capital		Earnings		Loss		Stock		Interests		Equity
Balance as of December 31, 2016	308.3	$	0.3	$	1,020.9	$	3,122.7	$	(469.0)	$	—	$	48.2	$	3,723.1
Net income							753.9						7.2		761.1
Other comprehensive income									182.8				2.1		184.9
Acquisitions resulting in noncontrolling interest													1.2		1.2
Purchase of noncontrolling interest					(5.5)								(9.5)		(15.0)
Distributions to shareholders of noncontrolling interests													(7.1)		(7.1)
Purchase of treasury stock											(555.6)				(555.6)
Retirement of treasury stock	(7.7)						(555.6)				555.6				—
Stock options exercised	4.4				135.3										135.3
Dividends declared							(155.7)								(155.7)
Stock-based compensation expense					37.1										37.1
Balance as of September 30, 2017	305.0	$	0.3	$	1,187.8	$	3,165.3	$	(286.2)	$	—	$	42.1	$	4,109.3

Schedules of dividends

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

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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2018

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)	2018		2017		2018		2017
Net income attributable to Amphenol Corporation shareholders	$	316.6	$	277.5	$	866.9	$	753.9
Basic weighted average common shares outstanding		300.5		305.0		301.7		305.8
Effect of dilutive stock options		11.9		10.7		11.9		10.3
Diluted weighted average common shares outstanding		312.4		315.7		313.6		316.1
Earnings per share attributable to Amphenol Corporation shareholders:
Basic	$	1.05	$	0.91	$	2.87	$	2.47
Diluted	$	1.01	$	0.88	$	2.76	$	2.39

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Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2018

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, 2018	33,222,364	$	52.27	7.05	$	1,180.3
Options granted	—
Options exercised	(602,549)
Options forfeited	(32,240)
Options outstanding at March 31, 2018	32,587,575		52.58	6.84		1,093.2
Options granted	6,111,100
Options exercised	(740,046)
Options forfeited	(116,740)
Options outstanding at June 30, 2018	37,841,889		58.50	7.15		1,089.4
Options granted	91,000
Options exercised	(1,952,700)
Options forfeited	(226,020)
Options outstanding at September 30, 2018	35,754,169	$	59.68	7.05	$	1,227.9
Vested and non-vested options expected to vest at September 30, 2018	33,489,508	$	58.93	6.97	$	1,175.0
Exercisable options at September 30, 2018	16,426,149	$	46.22	5.55	$	785.2

Summary of status of non-vested options and changes during the year

		Weighted
		Average
		Fair Value at
	Options	Grant Date
Non-vested options at January 1, 2018	19,600,440	$	8.29
Options granted	—		—
Options vested	(67,400)		8.13
Options forfeited	(32,240)		8.56
Non-vested options at March 31, 2018	19,500,800		8.29
Options granted	6,111,100		12.82
Options vested	(5,923,180)		8.35
Options forfeited	(116,740)		8.18
Non-vested options at June 30, 2018	19,571,980		9.69
Options granted	91,000		12.82
Options vested	(108,940)		8.40
Options forfeited	(226,020)		9.48
Non-vested options at September 30, 2018	19,328,020	$	9.71

Summary of activity in the option plans

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Total intrinsic value of stock options exercised	$	111.8	$	77.0	$	181.1	$	191.1
Total fair value of stock options vested		0.9		0.7		50.9		46.2

Schedule of restricted share activity

				Weighted Average
				Remaining
	Restricted	Fair Value at		Amortization
	Shares	Grant Date		Term (in years)
Restricted shares outstanding at January 1, 2018	12,905	$	73.25	0.37
Restricted shares granted	—		—
Restricted shares outstanding at March 31, 2018	12,905		73.25	0.13
Shares vested and issued	(13,046)		73.35
Restricted shares granted	14,469		87.93
Restricted shares outstanding at June 30, 2018	14,328		87.98	0.88
Restricted shares granted	—		—
Restricted shares outstanding at September 30, 2018	14,328	$	87.98	0.63

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Benefit Plans and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2018

Benefit Plans and Other Postretirement Benefits

Schedule of components of net pension expense

					Other Postretirement
	Pension Benefits				Benefits
Three Months Ended September 30:	2018		2017		2018		2017
Service cost	$	1.8	$	2.5	$	—	$	—
Interest cost		4.9		5.0		0.1		0.1
Expected return on plan assets		(9.6)		(7.8)		—		—
Amortization of prior service cost		0.6		0.7		—		—
Amortization of net actuarial losses		5.8		5.8		0.1		0.2
Net pension expense	$	3.5	$	6.2	$	0.2	$	0.3
Nine Months Ended September 30:
Service cost	$	5.6	$	7.3	$	—	$	—
Interest cost		14.7		14.9		0.3		0.3
Expected return on plan assets		(28.9)		(23.2)		—		—
Amortization of prior service cost		1.8		2.1		—		—
Amortization of net actuarial losses		17.5		17.2		0.3		0.5
Net pension expense	$	10.7	$	18.3	$	0.6	$	0.8

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Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2018

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, 2017	$	3,896.1	$	146.5	$	4,042.6
Acquisition-related		126.5		—		126.5
Foreign currency translation		(55.4)		—		(55.4)
Goodwill at September 30, 2018	$	3,967.2	$	146.5	$	4,113.7

Summary of the Company's intangible assets

		September 30, 2018						December 31, 2017
	Weighted	Gross				Net		Gross				Net
	Average	Carrying		Accumulated		Carrying		Carrying		Accumulated		Carrying
	Life (years)	Amount		Amortization		Amount		Amount		Amortization		Amount
Customer relationships	10	$	400.2	$	226.2	$	174.0	$	398.1	$	199.8	$	198.3
Proprietary technology	11		107.5		58.1		49.4		107.5		50.7		56.8
Backlog and other	2		34.0		33.7		0.3		34.0		33.6		0.4
Total intangible assets (definite-lived)	10		541.7		318.0		223.7		539.6		284.1		255.5
Trade names (indefinite-lived)			186.1		—		186.1		186.1		—		186.1
		$	727.8	$	318.0	$	409.8	$	725.7	$	284.1	$	441.6

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Debt (Tables)

9 Months Ended

Sep. 30, 2018

Debt

Schedule of debt

	September 30, 2018				December 31, 2017
	Carrying		Approximate		Carrying		Approximate
	Amount		Fair Value		Amount		Fair Value
Revolving Credit Facility	$	—	$	—	$	—	$	—
U.S. Commercial Paper Program		337.9		337.9		1,175.4		1,175.4
Euro Commercial Paper Program		512.9		512.9		—		—
2.55% Senior Notes due January 2019		749.9		749.5		749.8		752.8
2.20% Senior Notes due April 2020		399.8		393.6		399.8		398.0
3.125% Senior Notes due September 2021		374.9		371.4		374.8		381.2
4.00% Senior Notes due February 2022		499.6		506.9		499.5		522.5
3.20% Senior Notes due April 2024		349.7		335.7		349.6		351.9
Notes payable to foreign banks and other debt		43.6		43.6		6.6		6.6
Less unamortized deferred debt issuance costs		(9.8)		—		(12.9)		—
Total debt		3,258.5		3,251.5		3,542.6		3,588.4
Less current portion		790.2		789.8		1.1		1.1
Total long-term debt	$	2,468.3	$	2,461.7	$	3,541.5	$	3,587.3

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Income Taxes (Tables)

9 Months Ended

Sep. 30, 2018

Income Taxes

Schedule of provision for income taxes and effective tax rate

	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
Provision for income taxes	$	(100.0)		$	(78.1)		$	(280.8)		$	(212.7)
Effective tax rate		23.8	%		21.8	%		24.3	%		21.8	%

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2018

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, 2018:
Short-term investments	$	21.5	$	21.5	$	—	$	—
Forward contracts		2.5		—		2.5		—
Total	$	24.0	$	21.5	$	2.5	$	—
December 31, 2017:
Short-term investments	$	34.6	$	34.6	$	—	$	—
Forward contracts		2.3		—		2.3		—
Total	$	36.9	$	34.6	$	2.3	$	—

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New Accounting Pronouncements (Details) - USD ($) $ in Millions	Sep. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
New Accounting Pronouncements
Retained earnings	$ 2,935.8		$ 2,941.5
Impact of ASU 2014-09 | Impact of ASU 2014-09 adoption - Increase (decrease) to beginning retained earnings
New Accounting Pronouncements
Retained earnings		$ 3.2

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Revenue Recognition (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) item	Sep. 30, 2017 USD ($)
Revenue recognition
Remaining performance obligation, expected timing for substantial portion of performance obligations			3 months
Remaining performance obligation, expected timing for nearly all performance obligations			1 year
Practical expedient, performance obligation			true
Practical expedient, incremental cost of obtaining contract			true
Net sales	$ 2,129.0	$ 1,840.8	$ 5,977.3	$ 5,067.4
Minimum
Revenue recognition
Payment terms			30 days
Number of reporting periods that may be extended across for multiple delivery dates | item			1
Maximum
Revenue recognition
Payment terms			120 days
Percentage of net sales recognized over time			5.00%
Interconnect Products and Assemblies
Revenue recognition
Net sales	2,019.3		$ 5,659.5
Cable Products and Solutions
Revenue recognition
Net sales	109.7		317.8
End customers and contract manufacturers
Revenue recognition
Net sales	1,814.9		5,071.7
End customers and contract manufacturers | Interconnect Products and Assemblies
Revenue recognition
Net sales	1,725.9		4,828.9
End customers and contract manufacturers | Cable Products and Solutions
Revenue recognition
Net sales	89.0		242.8
Distributors and resellers
Revenue recognition
Net sales	314.1		905.6
Distributors and resellers | Interconnect Products and Assemblies
Revenue recognition
Net sales	293.4		830.6
Distributors and resellers | Cable Products and Solutions
Revenue recognition
Net sales	20.7		75.0
United States
Revenue recognition
Net sales	572.0		1,675.3
United States | Interconnect Products and Assemblies
Revenue recognition
Net sales	517.9		1,519.5
United States | Cable Products and Solutions
Revenue recognition
Net sales	54.1		155.8
China
Revenue recognition
Net sales	698.3		1,763.3
China | Interconnect Products and Assemblies
Revenue recognition
Net sales	696.9		1,760.0
China | Cable Products and Solutions
Revenue recognition
Net sales	1.4		3.3
Other foreign locations
Revenue recognition
Net sales	858.7		2,538.7
Other foreign locations | Interconnect Products and Assemblies
Revenue recognition
Net sales	804.5		2,380.0
Other foreign locations | Cable Products and Solutions
Revenue recognition
Net sales	$ 54.2		$ 158.7

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Inventories (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Inventories
Raw materials and supplies	$ 437.2	$ 386.2
Work in process	377.7	358.0
Finished goods	430.6	362.7
Inventories	$ 1,245.5	$ 1,106.9

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Reportable Business Segments (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) segment	Sep. 30, 2017 USD ($)
Segment reporting information
Number of reportable business segments | segment			2
Net sales	$ 2,129.0	$ 1,840.8	$ 5,977.3	$ 5,067.4
Segment operating income	444.2	377.9	1,229.3	1,028.2
Interconnect Products and Assemblies
Segment reporting information
Net sales	2,019.3		5,659.5
Cable Products and Solutions
Segment reporting information
Net sales	109.7		317.8
Operating Segment
Segment reporting information
Net sales	2,129.0	1,840.8	5,977.3	5,067.4
Segment operating income	472.5	402.6	1,309.3	1,104.8
Operating Segment | Interconnect Products and Assemblies
Segment reporting information
Net sales	2,019.3	1,731.5	5,659.5	4,754.3
Segment operating income	458.1	388.3	1,268.9	1,060.8
Operating Segment | Cable Products and Solutions
Segment reporting information
Net sales	109.7	109.3	317.8	313.1
Segment operating income	14.4	14.3	40.4	44.0
Inter-Segment
Segment reporting information
Net sales	11.9	13.6	34.7	38.4
Inter-Segment | Interconnect Products and Assemblies
Segment reporting information
Net sales	3.8	2.7	9.6	6.9
Inter-Segment | Cable Products and Solutions
Segment reporting information
Net sales	$ 8.1	$ 10.9	$ 25.1	$ 31.5

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Reportable Business Segments, Reconciliation of Segment Operating Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Reconciliation of segment operating income to consolidated income before income taxes
Segment operating income	$ 444.2	$ 377.9	$ 1,229.3	$ 1,028.2
Interest expense	(24.8)	(24.6)	(75.3)	(67.3)
Other income, net	0.2	5.1	2.5	12.9
Stock-based compensation expense	(14.4)	(12.6)	(40.4)	(37.1)
Acquisition-related expenses				(4.0)
Other operating expenses	(13.9)	(12.1)	(39.6)	(35.5)
Income before income taxes	419.6	358.4	1,156.5	973.8
Operating Segment
Reconciliation of segment operating income to consolidated income before income taxes
Segment operating income	$ 472.5	$ 402.6	$ 1,309.3	$ 1,104.8

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Shareholders' Equity and Noncontrolling Interests (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Increase (Decrease) In Shareholders' Equity
Balance at beginning of period			$ 4,043.4	$ 3,723.1
Net income	$ 319.6	$ 280.3	875.7	761.1
Other comprehensive (loss) income	(50.3)	55.7	(139.0)	184.9
Acquisition resulting in noncontrolling interest			0.3	1.2
Purchase of noncontrolling interest			(7.7)	(15.0)
Distributions to shareholders of noncontrolling interests			(10.2)	(7.1)
Purchase of treasury stock			(680.2)	(555.6)
Stock options exercised			123.0	135.3
Dividends declared	(69.3)	(57.9)	(195.6)	(155.7)
Stock-based compensation expense			40.4	37.1
Balance at end of period	$ 4,053.3	$ 4,109.3	$ 4,053.3	$ 4,109.3
Common Stock
Increase (Decrease) In Shareholders' Equity
Balance (in shares)			305.7	308.3
Balance at beginning of period			$ 0.3	$ 0.3
Retirement of treasury stock (in shares)			(7.7)	(7.7)
Stock options exercised (in shares)			3.3	4.4
Balance (in shares)	301.3	305.0	301.3	305.0
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			1,249.0	1,020.9
Purchase of noncontrolling interest			(2.3)	(5.5)
Stock options exercised			123.0	135.3
Stock-based compensation expense			40.4	37.1
Balance at end of period	1,410.1	1,187.8	1,410.1	1,187.8
Retained Earnings
Increase (Decrease) In Shareholders' Equity
Balance at beginning of period			2,941.5	3,122.7
Net income			866.9	753.9
Retirement of treasury stock			(680.2)	(555.6)
Dividends declared			(195.6)	(155.7)
Balance at end of period	2,935.8	3,165.3	2,935.8	3,165.3
Accumulated Other Comprehensive Loss
Increase (Decrease) In Shareholders' Equity
Balance at beginning of period			(201.0)	(469.0)
Other comprehensive (loss) income			(136.3)	182.8
Balance at end of period	(337.3)	(286.2)	(337.3)	(286.2)
Treasury Stock
Increase (Decrease) In Shareholders' Equity
Purchase of treasury stock			(680.2)	(555.6)
Retirement of treasury stock			680.2	555.6
Noncontrolling Interests
Increase (Decrease) In Shareholders' Equity
Balance at beginning of period			53.6	48.2
Net income			8.8	7.2
Other comprehensive (loss) income			(2.7)	2.1
Acquisition resulting in noncontrolling interest			0.3	1.2
Purchase of noncontrolling interest			(5.4)	(9.5)
Distributions to shareholders of noncontrolling interests			(10.2)	(7.1)
Balance at end of period	44.4	$ 42.1	44.4	$ 42.1
Impact of ASU 2014-09
Increase (Decrease) In Shareholders' Equity
Cumulative effect of adoption of revenue recognition standard (Note 2)	3.2		3.2
Impact of ASU 2014-09 | Retained Earnings
Increase (Decrease) In Shareholders' Equity
Cumulative effect of adoption of revenue recognition standard (Note 2)	$ 3.2		$ 3.2

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Shareholders' Equity and Noncontrolling Interests, Stock Repurchase (Details) - USD ($) $ in Millions			1 Months Ended	3 Months Ended		9 Months Ended	14 Months Ended
	Apr. 24, 2018	Jan. 24, 2017	Oct. 24, 2018	Sep. 30, 2018	Mar. 31, 2018	Sep. 30, 2018	Mar. 31, 2018
2017 Stock Repurchase Program
Shareholders' Equity
Value of shares authorized to be repurchased		$ 1,000.0
Repurchase of stock program, period		2 years
Number of shares repurchased and retired					4,200,000		12,600,000
Payments for shares repurchased and retired (in dollars)					$ 382.0		$ 1,000.0
2018 Stock Repurchase Program
Shareholders' Equity
Value of shares authorized to be repurchased	$ 2,000.0
Repurchase of stock program, period	3 years
Number of shares repurchased and retired			0	400,000		3,500,000
Payments for shares repurchased and retired (in dollars)				$ 34.8		$ 298.2
Value of shares remaining that may be repurchased under the stock repurchase program			$ 1,701.8

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Shareholders' Equity and Noncontrolling Interests, Dividends (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended			9 Months Ended
	Apr. 24, 2018	Sep. 30, 2018	Mar. 31, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Shareholders' Equity and Noncontrolling Interests
Dividends declared per share (in dollars per share)	$ 0.23	$ 0.23	$ 0.19	$ 0.19	$ 0.65	$ 0.51
Dividends declared		$ 69.3		$ 57.9	$ 195.6	$ 155.7
Dividends paid		$ 69.0		$ 48.8	$ 184.4	$ 147.1

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Earnings Per Share, Reconciliation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share
Net income attributable to Amphenol Corporation shareholders	$ 316.6	$ 277.5	$ 866.9	$ 753.9
Basic weighted average common shares outstanding (in shares)	300.5	305.0	301.7	305.8
Effect of dilutive stock options (in shares)	11.9	10.7	11.9	10.3
Diluted weighted average common shares outstanding (in shares)	312.4	315.7	313.6	316.1
Earnings per share attributable to Amphenol Corporation shareholders:
Basic (in dollars per share)	$ 1.05	$ 0.91	$ 2.87	$ 2.47
Diluted (in dollars per share)	$ 1.01	$ 0.88	$ 2.76	$ 2.39
Anti-dilutive common shares
Anti-dilutive stock options, excluded from the computations of earning per share (in shares)	6.1	5.3	2.5	2.1

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Stock-Based Compensation, Stock-based Comp Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Stock-Based Compensation
Expense incurred for stock-based compensation plans	$ 14.4	$ 12.6	$ 40.4	$ 37.1
Recognized tax benefit related to stock-based compensation	8.9	19.5	19.7	54.7
Excess tax benefit from option exercises	$ 7.0	$ 16.6	$ 14.1	$ 45.8

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Stock-Based Compensation, Stock Option and Restricted Shares (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended				6 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2017	Jun. 30, 2018	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
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	17,002,620					17,002,620
Options ratable vesting period						5 years
Options exercisable period						10 years
2004 Directors Option Plan
Stock-Based Compensation
Options exercisable period						10 years
Stock Options
Stock option activity
Options outstanding at the beginning of the period (in shares)	37,841,889	32,587,575	33,222,364		33,222,364	33,222,364
Options granted (in shares)	91,000	6,111,100
Options exercised (in shares)	(1,952,700)	(740,046)	(602,549)
Options forfeited (in shares)	(226,020)	(116,740)	(32,240)
Options outstanding at the end of the period (in shares)	35,754,169	37,841,889	32,587,575		37,841,889	35,754,169		33,222,364
Vested and non-vested options expected to vest at the end of the period (in shares)	33,489,508					33,489,508
Exercisable at the end of the period (in shares)	16,426,149					16,426,149
Weighted Average Exercise Price
Weighted average exercise price, options outstanding at the beginning of the period (in dollars per share)	$ 58.50	$ 52.58	$ 52.27		$ 52.27	$ 52.27
Weighted average exercise price, options outstanding at the end of the period (in dollars per share)	59.68	$ 58.50	$ 52.58		$ 58.50	59.68		$ 52.27
Weighted average exercise price, vested and non-vested options expected to vest (in dollars per share)	58.93					58.93
Weighted average exercise price, exercisable (in dollars per share)	$ 46.22					$ 46.22
Weighted Average Remaining Contractual Term
Weighted average remaining contractual term of options outstanding			6 years 10 months 2 days		7 years 1 month 24 days	7 years 18 days		7 years 18 days
Weighted average remaining contractual term of options vested options and non-vested expected to vest						6 years 11 months 19 days
Weighted average remaining contractual term of options exercisable						5 years 6 months 18 days
Aggregate Intrinsic Value
Aggregate intrinsic value of options outstanding	$ 1,227.9	$ 1,089.4	$ 1,093.2		$ 1,089.4	$ 1,227.9		$ 1,180.3
Aggregate intrinsic value of options, vested and non-vested options expected to vest	1,175.0					1,175.0
Aggregate intrinsic value of options exercisable	$ 785.2					$ 785.2
Status of the Company's non-vested options and changes during the year
Non-vested options at the beginning of the period (in shares)	19,571,980	19,500,800	19,600,440		19,600,440	19,600,440
Options granted (in shares)	91,000	6,111,100
Non-vested options, options vested (in shares)	(108,940)	(5,923,180)	(67,400)
Non-vested options, options forfeited (in shares)	(226,020)	(116,740)	(32,240)
Non-vested options at the end of the period (in shares)	19,328,020	19,571,980	19,500,800		19,571,980	19,328,020		19,600,440
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)	$ 9.69	$ 8.29	$ 8.29		$ 8.29	$ 8.29
Weighted average fair value at grant date, options granted (in dollars per share)	12.82	12.82
Weighted average fair value at grant date, options vested (in dollars per share)	8.40	8.35	8.13
Weighted average fair value at grant date, options forfeited (in dollars per share)	9.48	8.18	8.56
Weighted average fair value at the grant date, options outstanding at the end of the period (in dollars per share)	$ 9.71	$ 9.69	$ 8.29		$ 9.69	$ 9.71		$ 8.29
Fair Value at Grant Date
Total intrinsic value of stock options exercised (in dollars)	$ 111.8			$ 77.0		$ 181.1	$ 191.1
Total fair value of stock options vested (in dollars)	0.9			$ 0.7		50.9	$ 46.2
Total compensation cost related to non-vested options not yet recognized (in dollars)	$ 152.8					$ 152.8
Weighted average expected amortization period						3 years 6 months 26 days
Restricted Shares | 2012 Directors Restricted Stock Plan
Stock-Based Compensation
Shares available for the granting of additional stock options	109,695					109,695
Restricted share activity
Restricted shares outstanding at the beginning of the period (in shares)	14,328	12,905	12,905		12,905	12,905
Restricted shares granted (in shares)		14,469
Shares vested and issued (in shares)		(13,046)
Restricted shares outstanding at the end of the period (in shares)	14,328	14,328	12,905		14,328	14,328		12,905
Fair Value at Grant Date
Fair value at the grant date, restricted shares outstanding at the beginning of the period (in dollars per share)	$ 87.98	$ 73.25	$ 73.25		$ 73.25	$ 73.25
Fair value of restricted shares vested and issued (in dollar per share)		73.35
Fair value of restricted shares granted (in dollars per share)		87.93
Fair value at the grant date, restricted shares outstanding at the end of the period (in dollars per share)	$ 87.98	$ 87.98	$ 73.25		$ 87.98	$ 87.98		$ 73.25
Weighted Average Remaining Amortization Term (in years)			1 month 17 days		10 months 17 days	7 months 17 days		4 months 13 days
Total compensation cost related to non-vested restricted shares not yet recognized (in dollars)	$ 0.8					$ 0.8
Weighted average expected amortization period						7 months 17 days

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Benefit Plans and Other Postretirement Benefits, Net pension expense (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Jan. 31, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Pension Benefits
Defined Benefit Plan Disclosure
Estimated future employer contribution in fiscal year		$ 90.0		$ 90.0
Components of net pension expense:
Service cost		1.8	$ 2.5	5.6	$ 7.3
Interest cost		4.9	5.0	14.7	14.9
Expected return on plan assets		(9.6)	(7.8)	(28.9)	(23.2)
Amortization of prior service cost		0.6	0.7	1.8	2.1
Amortization of net actuarial losses		5.8	5.8	17.5	17.2
Net pension expense		3.5	6.2	10.7	18.3
Pension Benefits | United States
Defined Benefit Plan Disclosure
Plan contributions by employer	$ 81.0
Other Postretirement Benefits
Components of net pension expense:
Interest cost		0.1	0.1	0.3	0.3
Amortization of net actuarial losses		0.1	0.2	0.3	0.5
Net pension expense		$ 0.2	$ 0.3	$ 0.6	$ 0.8

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Benefit Plans and Other Postretirement Benefits, Defined contribution plans (Details) - United States - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Defined contribution plans
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	$ 6.2	$ 5.0

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Acquisitions (Details) $ in Millions	9 Months Ended
	Sep. 30, 2018 item	Sep. 30, 2017 USD ($)
Acquisitions
Number of acquisitions | item	3
Acquisition-related expenses		$ 4.0
Acquisition-related expenses, net of tax		$ 3.7

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Goodwill and Other Intangible Assets, Goodwill (Details) $ in Millions	9 Months Ended
	Sep. 30, 2018 USD ($)
Goodwill.
Goodwill, Beginning Balance	$ 4,042.6
Acquisition-related	126.5
Foreign currency translation	(55.4)
Goodwill, Ending Balance	4,113.7
Interconnect Products and Assemblies
Goodwill.
Goodwill, Beginning Balance	3,896.1
Acquisition-related	126.5
Foreign currency translation	(55.4)
Goodwill, Ending Balance	3,967.2
Cable Products and Solutions
Goodwill.
Goodwill, Beginning Balance	146.5
Goodwill, Ending Balance	$ 146.5

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Goodwill and Other Intangible Assets, Goodwill impairment results (Details) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2018 USD ($) segment	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Goodwill and Other Intangible Assets
Number of reportable business segments | segment	2
Goodwill impairment | $	$ 0.0	$ 0.0	$ 0.0

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Goodwill and Other Intangible Assets, Intangible Assets (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Intangible Assets
Weighted average useful lives of acquired amortizable intangible assets	10 years
Gross Carrying Amount (definite-lived)	$ 541.7	$ 539.6
Intangible assets, gross (excluding goodwill)	727.8	725.7
Accumulated Amortization	318.0	284.1
Net Carrying Amount, (definite-lived)	223.7	255.5
Indefinite-lived trade name intangible asset	186.1	186.1
Net Carrying Amount, intangible assets	$ 409.8	441.6
Customer relationships
Intangible Assets
Weighted average useful lives of acquired amortizable intangible assets	10 years
Gross Carrying Amount (definite-lived)	$ 400.2	398.1
Accumulated Amortization	226.2	199.8
Net Carrying Amount, (definite-lived)	$ 174.0	198.3
Proprietary technology
Intangible Assets
Weighted average useful lives of acquired amortizable intangible assets	11 years
Gross Carrying Amount (definite-lived)	$ 107.5	107.5
Accumulated Amortization	58.1	50.7
Net Carrying Amount, (definite-lived)	$ 49.4	56.8
Backlog and other
Intangible Assets
Weighted average useful lives of acquired amortizable intangible assets	2 years
Gross Carrying Amount (definite-lived)	$ 34.0	34.0
Accumulated Amortization	33.7	33.6
Net Carrying Amount, (definite-lived)	$ 0.3	$ 0.4

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Goodwill and Other Intangible Assets, Amortization (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Goodwill and Other Intangible Assets
Amortization expense	$ 11.6	$ 12.3	$ 35.4	$ 36.4
Amortization expense estimated for each of the next five fiscal years
Remainder of 2018	11.5		11.5
2019	42.7		42.7
2020	37.1		37.1
2021	32.4		32.4
2022	24.9		24.9
2023	$ 22.2		$ 22.2

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Goodwill and Other Intangible Assets, Intangible asset impairment results (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill and Other Intangible Assets
Impairment of intangible assets	$ 0.0	$ 0.0	$ 0.0

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Debt, Schedule of Debt (Details) € in Millions, $ in Millions	Sep. 30, 2018 EUR (€)	Sep. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017
Debt
Less deferred debt issuance costs		$ (9.8)	$ (12.9)
Total debt		3,258.5	3,542.6
Less current portion		790.2	1.1
Total long-term debt		2,468.3	3,541.5
Total debt, Approximate Fair Value		3,251.5	3,588.4
Less short-term debt, Approximate Fair Value		789.8	1.1
Long-term debt, Approximate Fair Value		2,461.7	3,587.3
U.S. Commercial Paper Program
Debt
Debt carrying amount, net of unamortized discount before deferred debt issuance costs		337.9	1,175.4
Total debt, Approximate Fair Value		337.9	$ 1,175.4
Euro Commercial Paper Program
Debt
Debt carrying amount, net of unamortized discount before deferred debt issuance costs	€ 442.0	512.9
Total debt, Approximate Fair Value		$ 512.9
2.55% Senior Notes due January 2019
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		$ 749.9	$ 749.8
Total debt, Approximate Fair Value		$ 749.5	$ 752.8
2.20% Senior Notes due April 2020
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		$ 399.8	$ 399.8
Total debt, Approximate Fair Value		$ 393.6	$ 398.0
3.125% Senior Notes due September 2021
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		$ 374.9	$ 374.8
Total debt, Approximate Fair Value		$ 371.4	$ 381.2
4.00% Senior Notes due February 2022
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		$ 499.6	$ 499.5
Total debt, Approximate Fair Value		$ 506.9	$ 522.5
3.20% Senior Notes due April 2024
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		$ 349.7	$ 349.6
Total debt, Approximate Fair Value		335.7	351.9
Notes payable to foreign banks and other debt
Debt
Debt carrying amount, net of unamortized discount before deferred debt issuance costs		43.6	6.6
Total debt, Approximate Fair Value		$ 43.6	$ 6.6
1.55% Senior Notes due September 2017
Debt
Stated interest rate (as a percent)				1.55%

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Debt, Other (Details) € in Millions, $ in Millions			1 Months Ended	9 Months Ended
	Oct. 08, 2018 EUR (€)	Jul. 10, 2018 USD ($) item	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($) item	Oct. 08, 2018 USD ($)	Sep. 30, 2018 EUR (€)	Sep. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Debt
Repayments of long-term debt				$ 8.7	$ 375.0
The “Revolving Credit Facility”
Debt
Borrowings under the Revolving Credit Facility								$ 0.0
Maximum borrowing capacity								2,000.0
Commercial Paper Programs
Debt
Maximum borrowing capacity		$ 2,000.0
U.S. Commercial Paper Program
Debt
Maturity term				397 days
Debt carrying amount, net of unamortized discount before deferred debt issuance costs								$ 337.9	$ 1,175.4
Average interest rate (as a percent)							2.36%	2.36%
Euro Commercial Paper Program
Debt
Maturity term		183 days
Debt carrying amount, net of unamortized discount before deferred debt issuance costs							€ 442.0	$ 512.9
Average interest rate (as a percent)							(0.13%)	(0.13%)
Number of wholly-owned subsidiaries that entered into a euro-commercial paper program | item		1
U.S. Senior Notes
Debt
Redemption price as a percentage of principal amount				100.00%
2.20% and 3.20% Senior Notes due April, 2020 and 2024, respectively
Debt
Number of senior notes issued | item					2
Debt instrument, principal amount			$ 750.0		$ 750.0
Debt issuance costs incurred			$ 5.2		$ 5.2
2.20% Senior Notes due April 2020
Debt
Debt carrying amount, net of unamortized discount before deferred debt issuance costs								$ 399.8	$ 399.8
Stated interest rate (as a percent)							2.20%	2.20%	2.20%
3.20% Senior Notes due April 2024
Debt
Debt carrying amount, net of unamortized discount before deferred debt issuance costs								$ 349.7	$ 349.6
Stated interest rate (as a percent)							3.20%	3.20%	3.20%
1.55% Senior Notes due September 2017
Debt
Stated interest rate (as a percent)			1.55%		1.55%
Repayments of long-term debt			$ 375.0
2.55% Senior Notes due January 2019
Debt
Debt carrying amount, net of unamortized discount before deferred debt issuance costs								$ 749.9	$ 749.8
Stated interest rate (as a percent)							2.55%	2.55%	2.55%
2.00% Euro Senior Notes due October 2028
Debt
Redemption price as a percentage of principal amount	100.00%
Stated interest rate (as a percent)	2.00%					2.00%
Debt instrument, principal amount	€ 500.0					$ 574.6
Debt instrument, face amount (as a percent)	99.498%					99.498%

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Income Taxes, Provision and Effective tax rate (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Taxes
Provision for income taxes	$ (100.0)	$ (78.1)	$ (280.8)	$ (212.7)
Effective tax rate (as a percent)	23.80%	21.80%	24.30%	21.80%
Excess tax benefit from option exercises	$ 7.0	$ 16.6	$ 14.1	$ 45.8
Impact on provision for income taxes (in basis points)	1.70%	4.70%	1.20%	4.70%

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Income Taxes, 2017 Tax Cuts and Jobs Act (Details) $ in Millions	3 Months Ended		9 Months Ended	12 Months Ended
	Jun. 30, 2018 USD ($)	Dec. 31, 2017 USD ($) item	Sep. 30, 2018 USD ($)	Dec. 31, 2017
Income Taxes
U.S. statutory federal tax rate (as a percent)			21.00%	35.00%
Estimated Tax Act Charge		$ 398.5	$ 0.0
Estimated Transition Tax		259.4
Provisional charge on unremitted foreign earnings		176.6
Income tax expense (benefit) associated with the remeasurement of net deferred tax liabilities		$ (37.5)
Number of components | item		3
Transition Tax installment paid	$ 18.0

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Income Taxes, Unrecognized tax benefits (Details) $ in Millions	Sep. 30, 2018 USD ($)
Reconciliation of the gross amounts of unrecognized tax benefits including interest and penalties
Liability for unrecognized tax benefits, including penalties and interest, which if recognized would impact the effective tax rate	$ 125.9
Unrecognized tax benefits, anticipated adjustment for changing facts and circumstances, over the next twelve month period	$ 15.5

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Fair Value Measurements (Details) - Recurring basis - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Fair value of assets and liabilities measured on recurring basis
Short-term investments	$ 21.5	$ 34.6
Forward contracts	2.5	2.3
Total	24.0	36.9
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair value of assets and liabilities measured on recurring basis
Short-term investments	21.5	34.6
Total	21.5	34.6
Significant Observable Inputs (Level 2)
Fair value of assets and liabilities measured on recurring basis
Forward contracts	2.5	2.3
Total	$ 2.5	$ 2.3