Amphenol (APH) 10-Q 29 Apr 22 2022 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2022	Apr. 26, 2022
Document and Entity Information
Entity Registrant Name	AMPHENOL CORPORATION
Entity Central Index Key	0000820313
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Mar. 31, 2022
Entity File Number	1-10879
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	22-2785165
Entity Address, Address Line One	358 Hall Avenue
Entity Address, City or Town	Wallingford
Entity Address, State or Province	CT
Entity Address, Postal Zip Code	06492
City Area Code	203
Local Phone Number	265-8900
Title of 12(b) Security	Class A Common Stock, $0.001 par value
Trading Symbol	APH
Security Exchange Name	NYSE
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		597,138,524
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 1,247.5	$ 1,197.1
Short-term investments	52.1	44.3
Total cash, cash equivalents and short-term investments	1,299.6	1,241.4
Accounts receivable, less allowance for doubtful accounts of $47.2 and $43.5, respectively	2,422.1	2,454.8
Inventories	1,989.7	1,894.1
Prepaid expenses and other current assets	397.3	367.9
Total current assets	6,108.7	5,958.2
Property, plant and equipment, less accumulated depreciation of $2,007.3 and $1,961.6, respectively	1,175	1,175.3
Goodwill	6,349.1	6,376.8
Other intangible assets, net	738.4	756.9
Other long-term assets	502.4	411.2
Total assets	14,873.6	14,678.4
Current Liabilities:
Accounts payable	1,275.9	1,312
Accrued salaries, wages and employee benefits	272.3	366.2
Accrued income taxes	116.6	88.8
Accrued dividends	119.5	119.8
Other accrued expenses	589.2	556.3
Current portion of long-term debt	23.7	4
Total current liabilities	2,397.2	2,447.1
Long-term debt, less current portion	4,908.8	4,795.9
Accrued pension and postretirement benefit obligations	187.8	193.4
Deferred income taxes	421.7	424.2
Other long-term liabilities	454.6	438.7
Total Liabilities	8,370.1	8,299.3
Redeemable noncontrolling interest	19.5	19
Equity:
Common stock	0.6	0.6
Additional paid-in capital	2,438.5	2,409
Retained earnings	4,391.5	4,278.9
Treasury stock, at cost	(101)	(100)
Accumulated other comprehensive loss	(303.5)	(286.5)
Total stockholders' equity attributable to Amphenol Corporation	6,426.1	6,302
Noncontrolling interests	57.9	58.1
Total equity	6,484	6,360.1
Total Liabilities, Redeemable Noncontrolling Interest and Equity	$ 14,873.6	$ 14,678.4

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Condensed Consolidated Balance Sheets
Allowance for doubtful accounts	$ 47.2	$ 43.5
Accumulated depreciation	$ 2,007.3	$ 1,961.6

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Condensed Consolidated Statements of Income
Net sales	$ 2,951.9	$ 2,377.1
Cost of sales	2,025.3	1,649.6
Gross profit	926.6	727.5
Selling, general and administrative expenses	336.8	262.7
Operating income	589.8	464.8
Interest expense	(28.1)	(28.6)
Other income (expense), net	1.7	(0.3)
Income before income taxes	563.4	435.9
Provision for income taxes	(134.2)	(104.1)
Net income	429.2	331.8
Less: Net income attributable to noncontrolling interests	(3.5)	(2.2)
Net income attributable to Amphenol Corporation	$ 425.7	$ 329.6
Net income per common share - Basic (in dollars per share)	$ 0.71	$ 0.55
Weighted average common shares outstanding - Basic (in shares)	598.3	598.5
Net income per common share - Diluted (in dollars per share)	$ 0.68	$ 0.53
Weighted average common shares outstanding - Diluted (in shares)	625.6	624.1

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Condensed Consolidated Statements of Comprehensive Income
Net income	$ 429.2	$ 331.8
Total other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(20.9)	(62.3)
Unrealized gain (loss) on hedging activities	0.6	0.1
Pension and postretirement benefit plan adjustment, net of tax of ($1.1) and ($1.6), respectively	3.3	5.1
Total other comprehensive income (loss), net of tax	(17)	(57.1)
Total comprehensive income	412.2	274.7
Less: Comprehensive income attributable to noncontrolling interests	(3.5)	(2)
Comprehensive income attributable to Amphenol Corporation	$ 408.7	$ 272.7

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Condensed Consolidated Statements of Comprehensive Income
Pension and postretirement benefit plan adjustment, tax	$ (1.1)	$ (1.6)

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flow - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Cash from operating activities:
Net income	$ 429.2	$ 331.8
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	91.1	76.7
Stock-based compensation expense	19.7	19.1
Deferred income tax provision (benefit)	13.4	14.2
Net change in components of working capital	(182.9)	(114.6)
Net change in other long-term assets and liabilities	(19.7)	(6.2)
Net cash provided by operating activities	350.8	321
Cash from investing activities:
Capital expenditures	(78.1)	(78.4)
Proceeds from disposals of property, plant and equipment	1.8	0.9
Purchases of investments	(100.3)	(46.2)
Sales and maturities of investments	35.8	48.5
Acquisitions, net of cash acquired	0	(185.6)	$ (2,225.4)
Other	(3.3)	(2.4)
Net cash used in investing activities	(144.1)	(263.2)
Cash from financing activities:
Proceeds from issuance of senior notes and other long-term debt	0.2	1.2
Repayments of senior notes and other long-term debt	(2.5)	(0.8)
Proceeds from short-term borrowings	20.1	0
(Repayments) borrowings under commercial paper programs, net	138.4	811.9
Purchase of treasury stock	(204)	(152.8)
Proceeds from exercise of stock options	20	21.1
Distributions to and purchases of noncontrolling interests	(3.6)	(7.6)
Dividend payments	(119.8)	(86.8)
Net cash (used in) provided by financing activities	(151.2)	586.2
Effect of exchange rate changes on cash and cash equivalents	(5.1)	(18.4)
Net (decrease) increase in cash and cash equivalents	50.4	625.6
Cash and cash equivalents balance, beginning of period	1,197.1	1,702	1,702
Cash and cash equivalents balance, end of period	1,247.5	2,327.6	$ 1,197.1
Cash paid for:
Interest	27.6	28.1
Income taxes, net	$ 93.8	$ 75.2

Basis of Presentation and Princ

Basis of Presentation and Principles of Consolidation	3 Months Ended
	Mar. 31, 2022
Basis of Presentation and Principles of Consolidation
Basis of Presentation and Principles of Consolidation	Note 1— Basis of Presentation and Principles of Consolidation ​ The Condensed Consolidated Balance Sheets as of March 31, 2022 and December 31, 2021, and each of the related Condensed Consolidated Statements of Income, Condensed Consolidated Statements of Comprehensive Income and Condensed Consolidated Statements of Cash Flow for the three months ended March 31, 2022 and 2021, 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, the condensed consolidated financial statements reflect all adjustments, including normal recurring adjustments considered necessary for a fair presentation of the results, in conformity with accounting principles generally accepted in the United States of America. The results of operations for the three months ended March 31, 2022 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, 2021 (the “2021 Annual Report”). ​ New Reportable Business Segments ​ Effective January 1, 2022, the Company aligned its businesses into three newly formed reportable business segments: (i) Harsh Environment Solutions, (ii) Communications Solutions (iii) Interconnect and Sensor Systems . This new alignment replaces our historic reportable business segments. The Company has begun reporting under its new reportable segments in connection with this Quarterly Report on Form 10-Q, which also includes the recasting of relevant prior year period segment information in order to enable year-over-year segment comparisons. Refer to Note 13 herein for further details related to the Company’s change in its reportable business segments effective January 1, 2022. ​

New Accounting Pronouncements

New Accounting Pronouncements	3 Months Ended
	Mar. 31, 2022
New Accounting Pronouncements
New Accounting Pronouncements	Note 2—New Accounting Pronouncements ​ The United Kingdom’s Financial Conduct Authority (the “FCA”), which regulates the London Interbank Offered Rate (“LIBOR”), announced in July 2017 its intent to phase out the use of LIBOR by the end of 2021. In December 2020, the ICE Benchmark Administration published a consultation on its intention to extend the publication of certain U.S. dollar LIBOR (“USD LIBOR”) rates until June 30, 2023. Subsequently in March 2021, the FCA announced some USD LIBOR tenors (overnight, 1-month, 3-month, 6-month and 12-month) will continue to be published until June 30, 2023. The U.S. Federal Reserve, in conjunction with the Alternative Reference Rates Committee, a steering committee comprised of large U.S. financial institutions, identified the Secured Overnight Financing Rate (the “SOFR”) as its preferred benchmark alternative to USD LIBOR. The SOFR represents a measure of the cost of borrowing cash overnight, collateralized by U.S. Treasury securities, and is calculated based on directly observable U.S. Treasury-backed repurchase transactions. In March 2020, in response to this transition, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2020-04, Reference Rate Reform (Topic 848) – Facilitation of the Effects of Reference Rate Reform on Financial Reporting expected to be discontinued by reference rate reform, and addresses operational issues likely to arise in modifying contracts to replace discontinued reference rates with new rates. ASU 2020-04 is effective as of March 12, 2020 through December 31, 2022. In January 2021, the FASB also issued ASU No. 2021-01 Reference Rate Reform (Topic 848): Scope , which permits entities to elect certain optional expedients and exceptions when accounting for derivatives and certain hedging relationships affected by changes in interest rates and the transition. Effective November 30, 2021, the Revolving Credit Facility (as defined in Note 4 herein) no longer references LIBOR for interest rate determinations. Due to our current limited reliance on borrowings tied to LIBOR, the Company currently believes that the LIBOR transition will not have a material impact on its financial condition, results of operations or cash flows. ​ In October 2021, the FASB issued ASU No. 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers (“ASU 2021-08”), which amends ASC 805 by requiring acquiring entities to apply ASC 606 to recognize and measure contract assets and contract liabilities in a business combination. Under current GAAP, an acquirer generally recognizes such items at fair value on the acquisition date. The intent of ASU 2021-08 is to address diversity in practice and improve comparability for both the recognition and measurement of acquired revenue contracts by providing (i) guidance on how to determine whether a contract liability is recognized by the acquirer in a business combination and (ii) specific guidance on how to recognize and measure contract assets and contract liabilities from revenue contracts in a business combination. ASU 2021-08 is effective for fiscal years, including interim periods within those fiscal years, beginning after December 15, 2022, and the amendments should be applied prospectively to business combinations occurring on or after the effective date of the amendments, with early adoption permitted. The Company is currently evaluating ASU 2021-08 and its potential impact on our consolidated financial statements.

Inventories

Inventories	3 Months Ended
	Mar. 31, 2022
Inventories
Inventories	Note 3—Inventories ​ Inventories consist of: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ 2022 2021 Raw materials and supplies $ 867.9 $ 818.4 ​ Work in process ​ 562.4 ​ 511.5 ​ Finished goods ​ 559.4 ​ 564.2 ​ ​ $ 1,989.7 $ 1,894.1 ​ ​

Debt

Debt	3 Months Ended
	Mar. 31, 2022
Debt
Debt	Note 4—Debt ​ The Company’s debt (net of any unamortized discount) consists of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2022 ​ December 31, 2021 ​ ​ Carrying ​ Approximate ​ Carrying ​ Approximate ​ Amount Fair Value Amount Fair Value Revolving Credit Facility ​ $ — $ — $ — $ — ​ U.S. Commercial Paper Program ​ 933.5 ​ 933.5 ​ 795.2 ​ 795.2 ​ Euro Commercial Paper Program ​ — ​ — ​ — ​ — ​ 3.20% Senior Notes due April 2024 ​ 349.9 ​ 351.9 ​ 349.9 ​ 363.5 ​ 2.050% Senior Notes due March 2025 ​ ​ 399.6 ​ ​ 388.8 ​ ​ 399.6 ​ ​ 407.4 ​ 0.750% Euro Senior Notes due May 2026 ​ ​ 552.4 ​ ​ 542.9 ​ ​ 565.5 ​ ​ 579.0 ​ 2.000% Euro Senior Notes due October 2028 ​ ​ 552.2 ​ ​ 564.6 ​ ​ 565.4 ​ ​ 626.7 ​ 4.350% Senior Notes due June 2029 ​ ​ 499.7 ​ ​ 526.3 ​ ​ 499.7 ​ ​ 567.7 ​ 2.800% Senior Notes due February 2030 ​ ​ 899.5 ​ ​ 851.8 ​ ​ 899.4 ​ ​ 928.3 ​ 2.200% Senior Notes due September 2031 ​ ​ 747.4 ​ ​ 664.4 ​ ​ 747.3 ​ ​ 733.4 ​ Other debt ​ 27.1 ​ 27.1 ​ 8.6 ​ 8.6 ​ Less: unamortized deferred debt issuance costs ​ (28.8) ​ — ​ (30.7) ​ — ​ Total debt ​ 4,932.5 ​ 4,851.3 ​ 4,799.9 ​ 5,009.8 ​ Less: current portion ​ 23.7 ​ ​ 23.7 ​ 4.0 ​ 4.0 ​ Total long-term debt ​ $ 4,908.8 $ 4,827.6 $ 4,795.9 $ 5,005.8 ​ ​ Revolving Credit Facility ​ On November 30, 2021, the Company amended and restated its $2,500.0 unsecured revolving credit facility (the “Revolving Credit Facility”). As a result, the Revolving Credit Facility no longer references LIBOR for interest rate determinations. The Revolving Credit Facility maintains the lenders’ aggregate commitments under the facility at . The Revolving Credit Facility matures in November 2026 and gives the Company the ability to borrow, in various currencies, at a spread that varies, based on the Company’s debt rating, over certain currency-specific benchmark rates, which benchmark rates in the case of U.S. dollar borrowings are either the base rate or the adjusted term SOFR. The Company may utilize the Revolving Credit Facility for general corporate purposes. outstanding 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 5). Any outstanding borrowings under the Revolving Credit Facility are classified as long-term debt in the accompanying Condensed Consolidated Balance Sheets. The Revolving Credit Facility requires payment of certain annual agency and commitment fees and requires that the Company satisfy certain financial covenants. ​ Term Loan Credit Facility ​ On April 19, 2022, the Company entered into a two-year . The 2022 Term Loan was undrawn at closing and may be drawn on up to occasions over the life of the facility. The 2022 Term Loan may be repaid at any time without premium or penalty, and, once prepaid, cannot be reborrowed. The proceeds from the 2022 Term Loan are expected to be used for general corporate purposes. Interest rates under the 2022 Term Loan are based on a spread over either the base rate or the adjusted term SOFR, which spread varies based on the Company’s debt rating. The carrying value of the 2022 Term Loan approximates its fair value due primarily to its market interest rates and is classified as Level 2 in the fair value hierarchy (Note 5). The 2022 Term Loan requires payment of certain commitment fees and requires that the Company satisfy certain financial covenants, which financial covenants are the same as those under the Revolving Credit Facility. ​ Commercial Paper Programs ​ The Company has a commercial paper program (the “U.S. Commercial Paper Program”) pursuant to which the Company may issue short-term unsecured commercial paper notes (the “USCP Notes”) in one or more private placements in the United States. 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 par or a discount therefrom, and bear varying interest rates on a fixed or floating basis. T . The Company utilizes borrowings under the U.S. Commercial Paper Program for general corporate purposes, which recently has included fully or partially funding acquisitions, as well as to repay certain outstanding senior notes . As of March 31, 2022, the amount of USCP Notes outstanding was $933.5, with a weighted average interest rate of 0.95% . ​ The Company and one of its wholly owned European subsidiaries (the “Euro Issuer”) also have a 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 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 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. T . As of March 31, 2022, there were ​ Amounts available under the Commercial Paper Programs may be borrowed, repaid and re-borrowed from time to time. in the aggregate. The Commercial Paper Programs are rated A-2 by Standard & Poor’s and P-2 by Moody’s and, based on the Board’s authorization described above, are currently backstopped by the Revolving Credit Facility, as amounts undrawn under the Company’s Revolving Credit Facility are available to repay Commercial Paper, if necessary. Net proceeds of the issuances of 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 Company’s Revolving Credit Facility. The carrying value of Commercial Paper approximates its fair value, due primarily to its market interest rates and is classified as Level 2 in the fair value hierarchy (Note 5). ​ U.S. Senior Notes ​ On September 14, 2021, the Company issued $750.0 principal amount of unsecured 2.200% Senior Notes due September 15, 2031 at 99.634% of face value (the “2031 Senior Notes”). The 2031 Senior Notes are unsecured and rank equally in right of payment with the Company’s and the Euro Issuer’s other unsecured senior indebtedness. Interest on the 2031 Senior Notes is payable semiannually on March 15 and September 15 of each year, commencing on March 15, 2022. Prior to June 15, 2031, the Company may, at its option, redeem some or all of the 2031 Senior Notes at any time by paying the redemption price (which includes a make-whole premium), plus accrued and unpaid interest, if any, to, but not including, the date of redemption. If redeemed on or after June 15, 2031, the Company may, at its option, redeem some or all of the 2031 Senior Notes at any time by paying the redemption price equal to ​ All of the Company’s outstanding senior notes in the United States (the “U.S. Senior Notes”) are unsecured and rank equally in right of payment with the Company’s and the Euro Issuer’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 redemption, and, with certain exceptions, a make-whole premium. ​ Euro Senior Notes ​ The Euro Issuer has two outstanding senior notes in Europe (collectively, the “Euro Notes” and, together with the U.S. Senior Notes, the “Senior Notes”), each of which were issued with a principal amount of €500.0 . The 0.750 Euro Senior Notes . The Company’s Euro Notes are unsecured and rank equally in right of payment with the Company’s and the Euro Issuer’s other unsecured senior indebtedness, and are fully and unconditionally guaranteed on a senior unsecured basis by the Company. Interest on each series of Euro Notes is payable annually. The Company may, at its option, redeem some or all of either series of Euro 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, but not including, the date of redemption, and, with certain exceptions, a make-whole premium. ​ The fair value of each series of Senior Notes is based on recent bid prices in an active market and is therefore classified as Level 1 in the fair value hierarchy (Note 5). The Company’s Senior Notes impose certain obligations on the Company and prohibit various actions by the Company unless it satisfies certain financial requirements.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2022
Fair Value Measurements
Fair Value Measurements	Note 5—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 currently subject to such standards with fair value disclosure requirements are primarily debt instruments, pension plan assets, short- and long-term investments, and derivative instruments. Each of these assets and liabilities is discussed below, with the exception of debt instruments, pension plan assets, and the fair value of assets acquired and liabilities assumed as part of acquisition accounting, which are covered in Note 4, Note 10 and Note 11, respectively, herein, in addition to the Notes to Consolidated Financial Statements in the 2021 Annual Report. Substantially all of the Company’s short- and long-term investments consist of certificates of deposit, which are considered as Level 2 in the fair value hierarchy. Long-term investments, the vast majority of which have original maturities of two years , are recorded in Other long-term assets in the accompanying Condensed Consolidated Balance Sheets. The carrying amounts of these short-term and long-term instruments, the vast majority of which are in non-U.S. bank accounts, approximate their respective fair values. The Company’s derivative instruments primarily consist of foreign exchange 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 Company reviews the fair value hierarchy classifications on a quarterly basis and determines the appropriate classification of such assets and liabilities subject to the fair value hierarchy standards based on, among other things, the ability to observe valuation inputs. The fair values of the Company’s financial and non-financial assets and liabilities subject to such standards as of March 31, 2022 and December 31, 2021 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) March 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Short-term investments ​ $ 52.1 ​ $ — ​ $ 52.1 ​ $ — Long-term investments ​ ​ 55.8 ​ ​ — ​ ​ 55.8 ​ ​ — Forward contracts ​ ​ (1.1) ​ ​ — ​ ​ (1.1) ​ ​ — Redeemable noncontrolling interest ​ ​ (19.5) ​ ​ — ​ ​ — ​ ​ (19.5) Total ​ $ 87.3 ​ $ — ​ $ 106.8 ​ $ (19.5) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Short-term investments ​ $ 44.3 ​ $ 44.3 ​ $ — ​ $ — Forward contracts ​ ​ (0.4) ​ ​ — ​ ​ (0.4) ​ ​ — Redeemable noncontrolling interest ​ ​ (19.0) ​ ​ — ​ ​ — ​ ​ (19.0) Total ​ $ 24.9 ​ $ 44.3 ​ $ (0.4) ​ $ (19.0) ​ The Company utilizes foreign exchange forward contracts, hedging instruments accounted for as cash flow hedges, in the management of foreign currency exposures. In addition, the Company also enters into foreign exchange forward contracts, accounted for as net investment hedges, to hedge our exposure to variability in the U.S. dollar equivalent of the net investments in certain foreign subsidiaries. As of March 31, 2022, the fair value of such foreign exchange forward contracts in the table above consisted of (i) two outstanding foreign exchange forward contracts accounted for as cash flow hedges, each expiring within one year , (ii) various outstanding foreign exchange forward contracts accounted for as net investment hedges and (iii) various outstanding foreign exchange forward contracts that are not designated as hedging instruments. The amounts recognized in Accumulated other comprehensive income (loss) associated with foreign exchange forward contracts and the amounts reclassified from Accumulated other comprehensive income (loss) to foreign exchange gain (loss), included in Cost of sales in the accompanying Condensed Consolidated Statements of Income during the three months ended March 31, 2022 and 2021, were not material. The fair values of the Company’s forward contracts are recorded within Prepaid expenses and other current assets, Other long-term assets, Other accrued expenses and Other long-term liabilities in the accompanying Condensed Consolidated Balance Sheets, depending on their value and remaining contractual period. ​ Certain acquisitions may result in noncontrolling interest holders who, in certain cases, are entitled to a put option, giving them the ability to put some or all of their redeemable interest in the shares of the acquiree to the Company. Specifically, if exercised by the noncontrolling interest holder, Amphenol would be required to purchase some or all of the option holder’s redeemable interest, at a redemption price during specified time period(s) stipulated in the respective acquisition agreement. The redeemable noncontrolling interest as of March 31, 2022 and December 31, 2021 is related to the acquisition of Halo Technology Limited (“Halo”), which closed in December 2021, and based on the terms of the agreement, will remain in temporary equity until the put option is either exercised and the entire redeemable noncontrolling interest is fully settled or the put option expires. The redemption value of the redeemable noncontrolling interest is generally calculated using Level 3 unobservable inputs based on a multiple of earnings, which, for the redeemable NCI currently outstanding, approximates fair value. As such, the redemption value is classified as Level 3 in the fair value hierarchy, and is recorded as Redeemable noncontrolling interest on the Condensed Consolidated Balance Sheets as of March 31, 2022 and December 31, 2021. Refer to Note 7 herein for a rollforward of the Redeemable noncontrolling interest for the three months ended March 31, 2022, as well as Note 1 of the Notes to Consolidated Financial Statements in the 2021 Annual Report for further discussion of the Company’s redeemable noncontrolling interest. ​ With the exception of the fair value of the assets acquired and liabilities assumed in connection with acquisition accounting, the Company does not have any other significant financial or non-financial assets and liabilities that are measured at fair value on a non-recurring basis.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2022
Income Taxes
Income Taxes	Note 6—Income Taxes ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ March 31, ​ ​ 2022 ​ 2021 ​ Provision for income taxes $ (134.2) ​ $ (104.1) ​ Effective tax rate 23.8 % 23.9 % ​ For the three months ended March 31, 2022 and 2021, stock option exercise activity had the impact of decreasing our Provision for income taxes by $3.8 and $2.6, respectively, and decreasing our effective tax rate by 70 basis points and 60 basis points, respectively, due to the recognition of excess tax benefits within Provision for income taxes in the accompanying Condensed Consolidated Statements of Income. ​ The United States federal government enacted the Tax Cuts and Jobs Act (“Tax Act”) in December 2017. As a result, in 2017, the Company recorded a transition tax (“Transition Tax”) related to the deemed repatriation of the accumulated unremitted earnings and profits of the Company’s foreign subsidiaries. The Company plans to pay its fifth annual installment of the Transition Tax, net of applicable tax credits and deductions, in the second quarter of 2022, and will pay the balance of the Transition Tax, net of applicable tax credits and deductions, over the remainder of the period ending 2025, as permitted under the Tax Act. The current and long-term portions of the Transition Tax are recorded in Accrued income taxes and Other long-term liabilities, respectively, on the Condensed Consolidated Balance Sheets as of March 31, 2022 and December 31, 2021. ​ 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 2017 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 . Unrecognized tax benefits are reviewed on an ongoing basis and are adjusted for changing facts and circumstances, including the progress of tax audits and the closing of statutes of limitations. Based on information currently available, management anticipates that over the next twelve-month period, audit activity could be completed and statutes of limitations may close relating to existing unrecognized tax benefits of approximately $13.1

Stockholders' Equity and Noncon

Stockholders' Equity and Noncontrolling Interests	3 Months Ended
	Mar. 31, 2022
Stockholders' Equity and Noncontrolling Interests
Stockholders' Equity and Noncontrolling Interests	Note 7—Stockholders’ 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 and redeemable noncontrolling interest for the three months ended March 31, 2022 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amphenol Corporation Stockholders ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Accumulated ​ ​ ​ ​ ​ ​ ​ Redeemable ​ Common Stock ​ Treasury Stock ​ Additional ​ ​ ​ ​ Other ​ Non- ​ ​ ​ ​ Non- ​ Shares ​ ​ ​ ​ Shares ​ ​ ​ ​ Paid-In ​ Retained ​ Comprehensive ​ controlling ​ Total ​ controlling ​ (in millions) Amount (in millions) Amount Capital Earnings Loss Interests Equity Interest ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance as of December 31, 2021 600.7 $ 0.6 (1.6) $ (100.0) $ 2,409.0 $ 4,278.9 $ (286.5) $ 58.1 $ 6,360.1 $ 19.0 Net income ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 425.7 ​ ​ ​ ​ 3.0 ​ 428.7 ​ ​ 0.5 Other comprehensive income (loss) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (17.0) ​ — ​ (17.0) ​ ​ — Purchase of noncontrolling interest ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (0.4) ​ ​ ​ ​ ​ ​ ​ ​ (0.1) ​ ​ (0.5) ​ ​ ​ Distributions to shareholders of noncontrolling interests ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (3.1) ​ (3.1) ​ ​ ​ Purchase of treasury stock ​ ​ ​ ​ ​ (2.6) ​ (204.0) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (204.0) ​ ​ ​ Retirement of treasury stock (2.3) ​ ​ — ​ 2.3 ​ 183.0 ​ ​ ​ ​ (183.0) ​ ​ ​ ​ ​ ​ ​ — ​ ​ ​ Stock options exercised 0.3 ​ ​ — ​ 0.3 ​ ​ 20.0 ​ 10.2 ​ ​ (10.6) ​ ​ ​ ​ ​ ​ ​ 19.6 ​ ​ ​ Dividends declared ($0.20 per common share) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (119.5) ​ ​ ​ ​ ​ ​ ​ (119.5) ​ ​ ​ Stock-based compensation expense ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 19.7 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 19.7 ​ ​ ​ Balance as of March 31, 2022 598.7 ​ $ 0.6 ​ (1.6) ​ $ (101.0) ​ $ 2,438.5 ​ $ 4,391.5 ​ $ (303.5) ​ $ 57.9 ​ $ 6,484.0 ​ $ 19.5 ​ ​ A rollforward of consolidated changes in equity for the three months ended March 31, 2021 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amphenol Corporation Stockholders ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Accumulated ​ ​ ​ ​ ​ ​ ​ ​ Common Stock ​ Treasury Stock ​ Additional ​ ​ ​ ​ Other ​ Non- ​ ​ ​ ​ Shares ​ ​ ​ ​ Shares ​ ​ ​ ​ Paid-In ​ Retained ​ Comprehensive ​ controlling ​ Total ​ (in millions) Amount (in millions) Amount Capital Earnings Loss Interests Equity ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance as of December 31, 2020 ​ 600.7 $ 0.6 (2.0) $ (111.1) $ 2,068.1 $ 3,705.4 $ (278.1) $ 67.0 $ 5,451.9 Net income ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 329.6 ​ ​ ​ ​ 2.2 ​ 331.8 Other comprehensive income (loss) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (56.9) ​ (0.2) ​ (57.1) Acquisitions resulting in noncontrolling interest ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1.8 ​ 1.8 Purchase of noncontrolling interest ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2.5 ​ ​ ​ ​ ​ ​ ​ ​ (7.3) ​ ​ (4.8) Distributions to shareholders of noncontrolling interests ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (2.8) ​ (2.8) Purchase of treasury stock ​ ​ ​ ​ ​ ​ (2.4) ​ (152.8) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (152.8) Retirement of treasury stock (2.1) ​ ​ — ​ 2.1 ​ 133.0 ​ ​ ​ ​ (133.0) ​ ​ ​ ​ ​ ​ ​ — Stock options exercised 0.6 ​ ​ — ​ 0.2 ​ ​ 13.5 ​ 16.0 ​ ​ (8.3) ​ ​ ​ ​ ​ ​ ​ 21.2 Dividends declared ($0.145 per common share) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (86.6) ​ ​ ​ ​ ​ ​ ​ (86.6) Stock-based compensation expense ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 19.1 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 19.1 Balance as of March 31, 2021 ​ 599.2 ​ $ 0.6 ​ (2.1) ​ $ (117.4) ​ $ 2,105.7 ​ $ 3,807.1 ​ $ (335.0) ​ $ 60.7 ​ $ 5,521.7 ​ Stock Repurchase Programs ​ On April 27, 2021, the Board authorized a stock repurchase program under which the Company may purchase up to $2,000.0 of the Company’s Class A Common Stock (“Common Stock”) during the three-year period ending April 27, 2024 (the “2021 Stock Repurchase Program”) in accordance with the requirements of Rule 10b-18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). During the three months ended March 31, 2022, the Company repurchased 2.6 million shares of its Common Stock for $204.0 under the 2021 Stock Repurchase Program. Of the total repurchases made during the first three months of 2022, 0.3 million shares, or $21.0 , were retained in Treasury stock at the time of repurchase. The remaining 2.3 million shares, or $183.0 , have been retired by the Company. From April 1, 2022 to April 26, 2022, the Company repurchased 0.7 million additional shares of its Common Stock for $51.0 under the 2021 Stock Repurchase Program, and, as of April 27, 2022, the Company has remaining authorization to purchase up to $1,287.1 of its Common Stock under the 2021 Stock Repurchase Program. The price and timing of any future purchases under the 2021 Stock Repurchase Program will depend on a number of factors, such as levels of cash generation from operations, the volume of stock options exercised by employees, cash requirements for acquisitions, dividends paid, economic and market conditions and the price of the Company’s Common Stock. ​ On April 24, 2018, the Board authorized a stock repurchase program under which the Company could purchase up to $2,000.0 of the Company’s Common Stock during the three-year period ending April 24, 2021 (the “2018 Stock Repurchase Program”) in accordance with the requirements of Rule 10b-18 of the Exchange Act. During the three months ended March 31, 2021, the Company repurchased under the 2018 Stock Repurchase Program. Of the total repurchases made during the first three months of 2021, 0.3 million shares, or $19.8 , were retained in Treasury stock at the time of repurchase. The remaining 2.1 million shares, or $133.0 , were retired by the Company. In April of 2021, the Company repurchased the remaining value of shares of its Common Stock authorized under the 2018 Stock Repurchase Program and, therefore, the 2018 Stock Repurchase Program was terminated. ​ Dividends ​ Contingent upon declaration by the Board, the Company pays a quarterly dividend on shares of its Common Stock. The following table summarizes the dividends declared and paid for the three months ended March 31, 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ ​ 2022 ​ 2021 ​ Dividends declared ​ $ 119.5 ​ $ 86.6 ​ Dividends paid (including those declared in the prior year) ​ 119.8 ​ 86.8 ​ ​ On October 26, 2021, the Board approved an increase to its quarterly dividend rate from $0.145 per share to $0.20 per share, effective with dividends declared in the fourth quarter of 2021, contingent upon declaration by the Board.

Stock-Based Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2022
Stock-Based Compensation
Stock-Based Compensation	Note 8—Stock-Based Compensation ​ For the three months ended March 31, 2022 and 2021, the Company’s Income before income taxes was reduced for stock-based compensation expense of $19.7 and $19.1 , respectively. In addition, for the three months ended March 31, 2022 and 2021, the Company recognized aggregate income tax benefits (associated with stock-based compensation) of $5.8 and $4.5 , respectively, in Provision for income taxes in the accompanying Condensed Consolidated Statements of Income. These aggregate income tax benefits during the three months ended March 31, 2022 and 2021 include excess tax benefits of $3.8 from option exercises. ​ 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”), which provided for the issuance of 60,000,000 shares. In March 2021, the Board authorized and approved the Amended and Restated 2017 Stock Purchase and Option Plan for Key Employees of Amphenol and Subsidiaries (the “Amended 2017 Employee Option Plan” and, together with the 2017 Employee Option Plan, the “2017 Option Plan”), which among other things, increased the number of shares reserved for issuance under the plan by 40,000,000 shares. The Amended 2017 Employee Option Plan was approved by the Company’s stockholders and became effective on May 19, 2021. As of March 31, 2022, there were shares of Common Stock available for the granting of additional stock options under the 2017 Option Plan. Prior to the approval of the 2017 Employee Option Plan, the Company issued stock options under the 2009 Stock Purchase and Option Plan for Key Employees of Amphenol and Subsidiaries, and its amendment (the “2009 Employee Option Plan”). No additional stock options will be granted under the 2009 Employee Option Plan. Options granted under the 2017 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. ​ Stock option activity for the three months ended March 31, 2022 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, 2022 65,300,748 ​ $ 42.00 6.47 ​ $ 2,968.8 ​ Options granted 532,721 ​ 85.92 ​ ​ ​ ​ ​ ​ Options exercised (646,759) ​ 30.24 ​ ​ ​ ​ ​ ​ Options forfeited (136,140) ​ 47.07 ​ ​ ​ ​ ​ ​ Options outstanding at March 31, 2022 65,050,570 ​ $ 42.46 6.27 ​ $ 2,145.0 ​ Vested and non-vested options expected to vest at March 31, 2022 62,416,843 ​ $ 42.14 6.20 ​ $ 2,078.2 ​ Exercisable options at March 31, 2022 33,332,906 ​ $ 35.41 4.98 ​ $ 1,331.2 ​ ​ A summary of the status of the Company’s non-vested options as of March 31, 2022 and changes during the three months then ended is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ Average ​ ​ ​ ​ ​ Fair Value at ​ ​ ​ Options ​ Grant Date Non-vested options at January 1, 2022 31,380,283 ​ $ 8.34 ​ Options granted 532,721 ​ 17.97 ​ Options vested (59,200) ​ 10.69 ​ Options forfeited (136,140) ​ 7.68 ​ Non-vested options at March 31, 2022 31,717,664 ​ $ 8.50 ​ ​ During the three months ended March 31, 2022 and 2021, the following activity occurred under the Company’s option plans: ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ March 31, ​ ​ 2022 ​ 2021 Total intrinsic value of stock options exercised ​ $ 34.3 ​ $ 28.9 Total fair value of stock options vested ​ 0.6 ​ 0.4 ​ As of March 31, 2022, the total compensation cost related to non-vested options not yet recognized was approximately $187.8 with a weighted average expected amortization period of 3.26 years. ​ The grant-date fair value of each option grant under the 2009 Employee Option Plan and the 2017 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 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 Stock ​ 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 Board. As of March 31, 2022, the number of restricted shares available for grant under the 2012 Directors Restricted Stock Plan was 141,359 . Restricted shares granted under the 2012 Directors Restricted Stock Plan vest on the earlier of the first anniversary of the date of grant or the day immediately prior to the date of the next regular annual meeting of the Company’s stockholders following such date of grant. 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 months ended March 31, 2022 was as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted Average ​ ​ ​ ​ ​ ​ ​ Remaining ​ ​ ​ Restricted ​ Fair Value at ​ Amortization ​ ​ Shares Grant Date Term (in years) Restricted shares outstanding at January 1, 2022 21,061 ​ $ 66.92 ​ 0.38 ​ Restricted shares granted — ​ — ​ ​ ​ Restricted shares outstanding at March 31, 2022 21,061 ​ $ 66.92 0.13 ​ ​ As of March 31, 2022, the total compensation cost related to non-vested restricted shares not yet recognized was approximately $0.2 (with a weighted average expected amortization period of 0.13 years).

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2022
Earnings Per Share
Earnings Per Share	Note 9—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 outstanding common shares, including dilutive common shares, the dilutive effect of which relates to stock options. The following is a reconciliation of the basic weighted average common shares outstanding to diluted weighted average common shares outstanding, which were used to calculate the earnings per share (basic and diluted) for the three months ended March 31, 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ (dollars and shares in millions, except per share data) 2022 2021 Net income attributable to Amphenol Corporation stockholders ​ $ 425.7 ​ $ 329.6 ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted average common shares outstanding — Basic ​ 598.3 ​ 598.5 ​ Effect of dilutive stock options ​ 27.3 ​ 25.6 ​ Weighted average common shares outstanding — Diluted ​ 625.6 ​ 624.1 ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income attributable to Amphenol Corporation per common share — Basic ​ $ 0.71 ​ $ 0.55 ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income attributable to Amphenol Corporation per common share — Diluted ​ $ 0.68 ​ $ 0.53 ​ ​ ​ Excluded from the computations above were anti-dilutive common shares (primarily related to outstanding stock options) of 4.1 million and 0.1 million for the three months ended March 31, 2022 and 2021, respectively.

Benefit Plans and Other Postret

Benefit Plans and Other Postretirement Benefits	3 Months Ended
	Mar. 31, 2022
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. The majority of U.S. employees are not covered by the U.S. Plans and are instead covered by various defined contribution plans. Certain foreign subsidiaries have defined benefit plans covering their employees (the “Foreign 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 for the three months ended March 31, 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension Benefits Three Months Ended March 31: 2022 2021 Service cost $ 1.5 $ 1.9 Interest cost ​ 3.5 ​ 2.8 Expected return on plan assets ​ (7.5) ​ (7.8) Amortization of prior service cost ​ 0.4 ​ 0.5 Amortization of net actuarial losses ​ 4.1 ​ 6.2 Net pension expense $ 2.0 $ 3.6 ​ Based on the Company’s current investment strategy for its U.S. Plans, the Company’s expected long-term rate of return assumption to determine net periodic pension expense for 2022 is 5.5% . ​ 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 employee contributions to the U.S. defined contribution plans up to a maximum of 6 % of eligible compensation. During the three months ended March 31, 2022 and 2021, the Company provided matching contributions to the U.S. defined contribution plans of approximately

Acquisitions

Acquisitions	3 Months Ended
	Mar. 31, 2022
Acquisitions
Acquisitions	Note 11—Acquisitions ​ 2021 Acquisitions ​ During the year ended December 31, 2021, the Company completed seven acquisitions for $2,225.4 , net of cash acquired, while also completing the divestiture of the Divested MTS business, as discussed below and in more detail in the 2021 Annual Report. acquisitions were included in the Interconnect and Sensor Systems segment. The Company completed the acquisition accounting, including the analyses of the fair value of the assets acquired and liabilities assumed, for of the acquisitions, for each of which the final assessment of values did not differ materially from the preliminary assessment. For the remaining 2021 acquisitions, the Company is in the process of completing its analyses of the fair value of the assets acquired and liabilities assumed, and anticipates that the final assessments of values for these acquisitions will not differ materially from the preliminary assessments. The operating results of the 2021 acquisitions were included in the Condensed Consolidated Statements of Income since their respective dates of acquisition. Pro forma financial information, as well as further details regarding the purchase price allocation related to these acquisitions, was not presented as these acquisitions were not material, either individually or in the aggregate, to the Company’s financial results. ​ Acquisition of MTS Systems Corporation and Sale of the Divested MTS Business ​ On April 7, 2021, the Company completed its acquisition of MTS Systems Corporation (Nasdaq: MTSC) (“MTS”) for a total enterprise value of approximately $1,700 , net of cash acquired and including the repayment of all outstanding debt and certain liabilities. MTS was historically organized into business segments: Sensors (“MTS Sensors”) and Test & Simulation (“MTS T&S”). The MTS acquisition was funded through a combination of borrowings under the U.S. Commercial Paper Program and cash on hand. At closing, the Company paid approximately of the common stock of MTS, including certain liabilities settled at closing, which was reflected within net cash used in investing activities from continuing operations in the Consolidated Statements of Cash Flow for the year ended December 31, 2021. In addition, the Company also assumed MTS’s then-outstanding , which included accrued interest and a make-whole premium incurred as a result of the early extinguishment of the senior notes. ​ Prior to the closing of the MTS acquisition, the Company entered into a definitive agreement to sell MTS (including the MTS T&S business, but excluding the MTS Sensors business) to Illinois Tool Works Inc. (“ITW”). Throughout this Quarterly Report on Form 10-Q, we refer to MTS (including the MTS T&S business, but excluding the MTS Sensors business) as the “Divested MTS business”. On December 1, 2021, the Company completed the sale of the Divested MTS business to ITW for approximately , net of cash divested and excluding related transaction fees and expenses. After giving effect to the sale of the Divested MTS business as well as the repayment of the aforementioned MTS senior notes as part of the MTS acquisition, the Company paid approximately ​ The Divested MTS business met the “held for sale” criteria at its acquisition date and accordingly, the Company did not assign the Divested MTS business to any of its reportable business segments. The Company accounted for the operating results and related cash flows associated with the Divested MTS business as discontinued operations in the Condensed Consolidated Statements of Income and Condensed Consolidated Statements of Cash Flow, respectively, as of the MTS acquisition date of April 7, 2021 through December 1, 2021, the date of the sale of the Divested MTS business. The assets acquired and liabilities assumed resulting from the purchase price allocation for the Divested MTS business were measured and recorded at fair value less costs to sell as of the date of the MTS acquisition and recorded as current assets held for sale and current liabilities held for sale, as separate single line items in the Company’s balance sheet from the MTS acquisition date through December 1, 2021, the date of the sale of the Divested MTS business. In addition, the Company assumed consideration liability in connection with the MTS acquisition, which was recognized at fair value as part of acquisition accounting. During the third quarter of 2021, the Company made a capital contribution to the Divested MTS business, which in turn used the funding to settle the contingent consideration liability. ​ Upon the sale of the Divested MTS business in December 2021, the Company completed the acquisition accounting associated with the Divested MTS business, which was performed separately from the purchase price allocation of the retained MTS Sensors business. The proceeds from the sale of the Divested MTS business were included in Net cash provided by investing activities from discontinued operations in the Consolidated Statements of Cash Flow for the year ended December 31, 2021. The sale of the Divested MTS business did not result in any significant gain or loss recorded to discontinued operations in the Consolidated Statements of Income for the year ended December 31, 2021 ​ The retained MTS Sensors business is reported within our Interconnect and Sensor Systems segment. The Company is in the process of completing its analyses of the purchase price allocation of the fair value of the tangible and identifiable intangible assets acquired and liabilities assumed, as part of the acquisition accounting associated with the MTS Sensors business. The MTS acquisition resulted in the recognition of $737.8 of goodwill, $54.0 of indefinite-lived tradename intangible assets and $178.2 of definite-lived intangible assets, each associated with the MTS Sensors business. The definite-lived intangible assets are comprised of customer relationships, proprietary technology, and backlog of $122.9, $39.1 and $16.2, respectively, and are amortized based upon the underlying pattern of economic benefit with weighted-average useful lives of 11 years , 15 years and 0.25 years, respectively. Other than these intangible assets, the remainder of the purchase price has been allocated to other identifiable assets acquired and liabilities assumed. As part of acquisition accounting, the Company also recorded $47.0 of deferred tax liabilities associated with certain basis differences, the majority of which the Company recognized for tax purposes and paid in the fourth quarter of 2021 upon the sale of the Divested MTS business. The excess purchase price over the fair value of the underlying assets acquired (net of liabilities assumed) was allocated to goodwill, which primarily represents the value of assembled workforce and the anticipated cost savings and efficiencies associated with the integration of the MTS Sensors business, along with other intangible assets acquired that do not qualify for separate recognition. The Company does no t expect any such recognized goodwill associated with the acquisition of the MTS Sensors business to be deductible for tax purposes. While the Company is in the process of completing its analyses of the fair value of the assets acquired and liabilities assumed, we do not anticipate that the final assessment of values for the MTS acquisition will differ materially from the current assessment. ​ Acquisition of Halo Technology Limited ​ On December 1, 2021, the Company completed the acquisition of approximately 97% of the common stock of Halo Technology Limited (“Halo”) for a purchase price of approximately $694 , net of cash acquired. The sellers retained a less than 3 % noncontrolling interest in Halo, which includes redeemable features that are outside the control of the Company and therefore, has been classified as temporary equity on the Condensed Consolidated Balance Sheets as of March 31, 2022 and December 31, 2021, as discussed in more detail in Note 5 herein. The acquisition was funded with cash on hand. The Company is in the process of analyzing the allocation of the fair value of the tangible and identifiable intangible assets acquired and liabilities assumed, as part of acquisition accounting. As of March 31, 2022, the Halo acquisition resulted in the recognition of $530.7 of goodwill, $28.0 of indefinite-lived tradename intangible assets and $156.0 of definite-lived intangible assets. The definite-lived intangible assets are comprised of customer relationships, proprietary technology, and backlog of $31.0, $116.0 and $9.0, respectively, and are amortized based upon the underlying pattern of economic benefit with weighted average useful lives of 10 years , 15 years and one month , respectively. Other than these intangible assets, the remainder of the purchase price has been allocated to other identifiable assets acquired and liabilities and noncontrolling interests (including redeemable noncontrolling interests) assumed. As part of acquisition accounting, the excess purchase price over the fair value of the underlying assets acquired (net of liabilities and noncontrolling interests assumed) was allocated to goodwill, which primarily represents the value of assembled workforce and the anticipated cost savings and efficiencies associated with the integration of Halo, along with other intangible assets acquired that do not qualify for separate recognition. The Company does no t expect any such recognized goodwill associated with the Halo acquisition to be deductible for tax purposes. Since the current purchase price allocation is based on a preliminary assessment made by management as of March 31, 2022, the acquisition accounting for Halo is subject to final adjustment and it is possible that the final assessment of values may differ from our preliminary assessment. The operating results for Halo have been included in the Condensed Consolidated Statements of Income since the acquisition date. The acquisition of Halo, which is reported within our Communications Solutions segment, was not material to the Company’s financial results. ​ Acquisition-related Expenses ​ During 2021, the Company incurred $70.4 ($57.3 after-tax) of acquisition-related expenses, comprised primarily of transaction, severance, restructuring and certain non-cash purchase accounting costs related to the MTS acquisition in the second quarter of 2021, along with external transaction costs and certain non-cash purchase accounting costs related to the Halo acquisition in the fourth quarter of 2021. To the extent such expenses are incurred in the periods presented, such acquisition-related expenses are presented separately in the Condensed Consolidated Statements of Income.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	3 Months Ended
	Mar. 31, 2022
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: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Harsh ​ ​ Interconnect ​ ​ ​ ​ Environment ​ Communications ​ and Sensor ​ ​ ​ ​ ​ Solutions ​ Solutions ​ Systems ​ Total Goodwill at December 31, 2021 ​ $ 1,663.7 ​ $ 2,950.1 ​ $ 1,763.0 ​ $ 6,376.8 ​ Acquisition-related ​ (1.1) ​ 3.4 ​ (3.4) ​ (1.1) ​ Foreign currency translation ​ (5.4) ​ (9.1) ​ (12.1) ​ (26.6) ​ Goodwill at March 31, 2022 ​ $ 1,657.2 ​ $ 2,944.4 ​ $ 1,747.5 ​ $ 6,349.1 ​ ​ Other than goodwill noted above, the Company’s intangible assets as of March 31, 2022 and December 31, 2021 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2022 ​ December 31, 2021 ​ Weighted ​ Gross ​ Net Gross ​ Net ​ Average ​ Carrying ​ Accumulated ​ Carrying ​ Carrying ​ Accumulated ​ Carrying ​ Life (years) ​ Amount ​ Amortization ​ Amount ​ Amount ​ Amortization ​ Amount Customer relationships 10 ​ $ 635.4 ​ $ 368.7 ​ $ 266.7 ​ $ 637.2 ​ $ 357.5 ​ $ 279.7 Proprietary technology 13 ​ 311.0 ​ 107.6 ​ ​ 203.4 ​ 311.1 ​ 102.2 ​ ​ 208.9 Backlog and other 1 ​ 74.9 ​ 74.7 ​ ​ 0.2 ​ 74.9 ​ 74.7 ​ ​ 0.2 Total intangible assets (definite-lived) 10 ​ ​ 1,021.3 ​ ​ 551.0 ​ ​ 470.3 ​ ​ 1,023.2 ​ ​ 534.4 ​ ​ 488.8 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trade names (indefinite-lived) ​ ​ ​ 268.1 ​ ​ ​ ​ ​ 268.1 ​ ​ 268.1 ​ ​ ​ ​ ​ 268.1 ​ ​ ​ $ 1,289.4 ​ $ 551.0 ​ $ 738.4 ​ $ 1,291.3 ​ $ 534.4 ​ $ 756.9 ​ Amortization expense for the three months ended March 31, 2022 and 2021 was approximately $18.0 and $12.3 , respectively. As of March 31, 2022, amortization expense relating to the Company’s current intangible assets estimated for the remainder of 2022 is approximately $49.9 and for each of the next five fiscal years is approximately $64.6 in 2023, $59.0 in 2024, $49.7 in 2025, $47.9 in 2026 and $41.2 in 2027.

Reportable Business Segments

Reportable Business Segments	3 Months Ended
	Mar. 31, 2022
Reportable Business Segments
Reportable Business Segments	Note 13—Reportable Business Segments ​ New Reportable Business Segments ​ Effective January 1, 2022, the Company aligned its businesses into three newly formed reportable business segments: (i) Harsh Environment Solutions (ii) Communications Solutions (iii) Interconnect and Sensor Systems This new alignment replaces our historic reportable business segments. All businesses previously reported in the Interconnect Products and Assemblies segment have now been aligned with newly formed segments. All businesses previously reported in the Cable Products and Solutions segment have now been aligned with our newly formed Communications Solutions segment. This new segment structure reflects (i) the manner in which the Chief Operating Decision Maker (“CODM”), who is the Company’s Chief Executive Officer, regularly assesses information for decision-making purposes, including the allocation of resources, and (ii) how the Company operates its businesses, assesses performance, and communicates results and strategy, among other items, to the Company’s Board and its stockholders. In conjunction with the new alignment of our business, the Company appointed three new segment managers (“Segment Managers”) to lead their respective reportable business segments, each reporting directly to the Chief Executive Officer. The Company organizes its reportable business segments based on the manner in which management evaluates the performance of the Company, combined with the nature of the individual business activities and the product-based solutions offered. ​ The following are the Company’s three new reportable business segments: ​ ​ ● Harsh Environment Solutions – the Harsh Environment Solutions segment designs, manufactures and markets a broad range of ruggedized interconnect products, including connectors and interconnect systems, printed circuits and printed circuit assemblies and other products for use in the industrial, military, commercial aerospace, automotive, mobile networks and information technology and data communications end markets. ​ ● Communications Solutions – the Communications Solutions segment designs, manufactures and markets a broad range of connector and interconnect systems, including high speed, radio frequency, power, fiber optic and other products, together with antennas, for use in the information technology and data communications, mobile devices, industrial, mobile networks, broadband communications, automotive, commercial aerospace and military end markets. ​ ● Interconnect and Sensor Systems – the Interconnect and Sensor Systems segment designs, manufactures and markets a broad range of sensors, sensor-based systems, connectors and value-add interconnect systems used in the automotive, industrial, information technology and data communications, mobile networks, military and commercial aerospace end markets. ​ ​ The Company has recast all relevant prior year period segment information in order to enable year-over-year segment comparisons in this Quarterly Report on Form 10-Q. 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 Consolidated Financial Statements in the 2021 Annual Report. The Company evaluates the performance of the segments and allocates resources to each of them based on, among other things, profit or loss from operations before certain corporate and other related items such as interest, stock-based compensation expense, income taxes, amortization related to certain intangible assets and nonrecurring gains and losses. The Company also incurs general corporate expenses and costs which are not allocated to the reportable business segments, but have been included in “Corporate / Other” in the following tables for reconciliation purposes. Assets are reviewed by the CODM on a consolidated basis and therefore are not presented by reportable business segment. ​ Net sales by segment for the three months ended March 31, 2022 and 2021 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ External ​ Intersegment Three Months Ended March 31: ​ 2022 ​ 2021 ​ 2022 ​ 2021 Harsh Environment Solutions $ 727.6 ​ $ 628.0 ​ $ 15.5 ​ $ 15.8 Communications Solutions ​ ​ 1,320.1 ​ ​ 1,028.0 ​ ​ 19.3 ​ ​ 20.8 Interconnect and Sensor Systems ​ ​ 904.2 ​ ​ 721.1 ​ ​ 5.1 ​ ​ 6.2 Consolidated Net sales ​ $ 2,951.9 ​ $ 2,377.1 ​ $ 39.9 ​ $ 42.8 ​ Segment operating income and the reconciliation of segment operating income to consolidated income before income taxes for the three months ended March 31, 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ ​ 2022 ​ 2021 Segment operating income: ​ ​ ​ ​ ​ ​ Harsh Environment Solutions ​ $ 183.2 ​ $ 158.3 Communications Solutions ​ ​ 282.5 ​ ​ 204.5 Interconnect and Sensor Systems ​ ​ 160.0 ​ ​ 135.1 Total segment operating income ​ ​ 625.7 ​ ​ 497.9 ​ ​ ​ ​ ​ ​ ​ Corporate / Other: ​ ​ ​ ​ ​ ​ Stock-based compensation expense ​ ​ (19.7) ​ ​ (19.1) Other operating expenses ​ ​ (16.2) ​ ​ (14.0) Interest expense ​ ​ (28.1) ​ ​ (28.6) Other income (expense), net ​ ​ 1.7 ​ ​ (0.3) ​ ​ ​ ​ ​ ​ ​ Income before income taxes ​ $ 563.4 ​ $ 435.9 ​ ​ Depreciation and amortization expense by segment for the three months ended March 31, 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ ​ 2022 ​ 2021 Harsh Environment Solutions $ 18.4 ​ $ 18.0 Communications Solutions ​ ​ 42.0 ​ ​ 30.9 Interconnect and Sensor Systems ​ ​ 29.2 ​ ​ 26.2 Corporate / Other ​ ​ 1.5 ​ ​ 1.6 Total ​ $ 91.1 ​ $ 76.7 ​ ​

Revenue Recognition

Revenue Recognition	3 Months Ended
	Mar. 31, 2022
Revenue Recognition
Revenue Recognition	Note 14—Revenue Recognition ​ 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. 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 where the Company has a present right to payment for such goods. For the three months ended March 31, 2022 and 2021, less than 5% of our net sales were recognized over time, where 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. Since we typically invoice our customers at the same time that we satisfy our performance obligations, contract assets and contract liabilities related to our contracts with customers recorded in the Condensed Consolidated Balance Sheets were not material as of March 31, 2022 and December 31, 2021. These amounts are recorded in the accompanying Condensed Consolidated Balance Sheets within Prepaid expenses and other current assets or Other accrued expenses as of March 31, 2022 and December 31, 2021. ​ 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. It is generally expected that a substantial portion of our remaining performance obligations will be fulfilled within three months , and 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 not disclosed the aggregate amount of transaction prices associated with unsatisfied or partially unsatisfied performance obligations as of March 31, 2022. ​ While the Company typically offers 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, the Company’s warranty liabilities as of March 31, 2022 and December 31, 2021, and related warranty expense for the three months ended March 31, 2022 and 2021, have not been and were not material in the accompanying Condensed Consolidated Financial Statements. ​ Disaggregation of Net Sales ​ The following table shows 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 months ended March 31, 2022 and 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Harsh ​ ​ ​ ​ ​ ​ ​ ​ Environment ​ Communications ​ Interconnect and ​ Total Reportable ​ ​ Solutions ​ Solutions ​ Sensor Systems ​ Business Segments Three Months Ended March 31, 2022 2021 2022 2021 2022 2021 ​ 2022 2021 Net sales by: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Sales channel: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ End customers and contract manufacturers ​ $ 512.1 $ 466.6 $ 1,035.5 $ 847.0 $ 874.2 $ 699.7 ​ $ 2,421.8 $ 2,013.3 Distributors and resellers ​ 215.5 ​ 161.4 ​ 284.6 ​ 181.0 ​ 30.0 ​ 21.4 ​ 530.1 ​ 363.8 ​ ​ $ 727.6 ​ $ 628.0 ​ $ 1,320.1 ​ $ 1,028.0 ​ $ 904.2 ​ $ 721.1 ​ $ 2,951.9 ​ $ 2,377.1 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Geography: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ United States ​ $ 354.8 ​ $ 316.0 ​ $ 315.8 ​ $ 190.1 ​ $ 243.3 ​ $ 167.8 ​ $ 913.9 ​ $ 673.9 China ​ 108.2 ​ 93.6 ​ 453.8 ​ 435.1 ​ 194.1 ​ 132.2 ​ ​ 756.1 ​ ​ 660.9 Other foreign locations ​ 264.6 ​ 218.4 ​ 550.5 ​ 402.8 ​ 466.8 ​ 421.1 ​ 1,281.9 ​ ​ 1,042.3 ​ ​ $ 727.6 ​ $ 628.0 ​ $ 1,320.1 ​ $ 1,028.0 ​ $ 904.2 ​ $ 721.1 ​ $ 2,951.9 ​ $ 2,377.1 ​ Net sales by geographic area are based on the customer location to which the product is shipped. It is impracticable to disclose net sales by product or group of products.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2022
Commitments and Contingencies
Commitments and Contingencies	Note 15—Commitments and Contingencies ​ From time to time, the Company has been threatened with, or named as a defendant in, various legal or regulatory actions in the ordinary course of business. 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 or regulatory 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. ​ In August 2018, the Company received a subpoena from the U.S. Department of Defense, Office of the Inspector General (the “OIG”), 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. As of the date of this filing, the Company has responded to several production requests from the OIG, with the most recent being completed during the third quarter of 2021. This matter is ongoing and the Company continues to cooperate with the OIG on its requests. The Company is currently unable to estimate the timing or outcome of the matter. ​ From December 2019 through October 2020, the Company was named as one of several defendants in four separate lawsuits filed in the State of Indiana . The lawsuits relate to a manufacturing site in Franklin, Indiana (the “Site”) where the Company has been conducting an environmental clean-up effort under the direction of the United States Environmental Protection Agency (the “EPA”). The Site was shut down in 1983, more than three years before the Company acquired the Site as part of a larger acquisition that led to the establishment of the Company’s business in 1987 (the “Acquisition”). In connection with the Acquisition, the Company agreed, and has continued, to work closely with the EPA regarding the ongoing clean-up effort at the Site, subject to an indemnity from the seller (the “Seller”). In 1989, the Company sold the property where the Site is located. The lawsuits collectively seek, among other things, compensation for personal injuries and for past, present and future medical expenses, compensation for loss of property values near the Site and costs related to medical monitoring for individuals living close to the Site, in each case arising from alleged exposure to hazardous chemicals. The Company denies any wrongdoing and is defending each of the above described lawsuits. All the costs incurred relating to these lawsuits have been reimbursed by the Seller based on the Seller’s indemnification obligations entered into in connection with the Acquisition (the “1987 Indemnification Agreement”). In addition, the environmental investigation, remediation and monitoring activities undertaken by the Company relating to the Site have been reimbursed under the 1987 Indemnification Agreement. As a result, the Company does not believe that the costs associated with these lawsuits or the resolution of the related environmental matters will have a material adverse effect on the Company’s consolidated financial condition, results of operations or cash flows. ​ In March 2021, a non-material customer of the Company filed a formal request for arbitration against the Company relating to a product sold to such customer that the customer alleges did not meet the agreed upon product specification. The customer is pursuing breach of warranty claims against the Company, among other assertions, and is seeking damages relating to its estimated costs of replacing the product. While the customer has claimed damages of approximately €112 , the arbitrator will have discretion to determine the actual amount of damages as well as the apportionment of responsibility between the parties. The Company has denied that its product caused the damages, that its product did not meet the agreed upon specifications and that the claimed damages are appropriate, and is vigorously defending itself in the arbitration. ​ Certain operations of the Company are subject to environmental laws and regulations that 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.

Basis of Presentation and Pri_2

Basis of Presentation and Principles of Consolidation (Policy)	3 Months Ended
	Mar. 31, 2022
Basis of Presentation and Principles of Consolidation
Principles of Consolidation	​ The Condensed Consolidated Balance Sheets as of March 31, 2022 and December 31, 2021, and each of the related Condensed Consolidated Statements of Income, Condensed Consolidated Statements of Comprehensive Income and Condensed Consolidated Statements of Cash Flow for the three months ended March 31, 2022 and 2021, 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, the condensed consolidated financial statements reflect all adjustments, including normal recurring adjustments considered necessary for a fair presentation of the results, in conformity with accounting principles generally accepted in the United States of America. The results of operations for the three months ended March 31, 2022 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, 2021 (the “2021 Annual Report”).

Inventories (Tables)

Inventories (Tables)	3 Months Ended
	Mar. 31, 2022
Inventories
Schedule of Inventories	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ 2022 2021 Raw materials and supplies $ 867.9 $ 818.4 ​ Work in process ​ 562.4 ​ 511.5 ​ Finished goods ​ 559.4 ​ 564.2 ​ ​ $ 1,989.7 $ 1,894.1 ​

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2022
Debt
Schedule of debt	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2022 ​ December 31, 2021 ​ ​ Carrying ​ Approximate ​ Carrying ​ Approximate ​ Amount Fair Value Amount Fair Value Revolving Credit Facility ​ $ — $ — $ — $ — ​ U.S. Commercial Paper Program ​ 933.5 ​ 933.5 ​ 795.2 ​ 795.2 ​ Euro Commercial Paper Program ​ — ​ — ​ — ​ — ​ 3.20% Senior Notes due April 2024 ​ 349.9 ​ 351.9 ​ 349.9 ​ 363.5 ​ 2.050% Senior Notes due March 2025 ​ ​ 399.6 ​ ​ 388.8 ​ ​ 399.6 ​ ​ 407.4 ​ 0.750% Euro Senior Notes due May 2026 ​ ​ 552.4 ​ ​ 542.9 ​ ​ 565.5 ​ ​ 579.0 ​ 2.000% Euro Senior Notes due October 2028 ​ ​ 552.2 ​ ​ 564.6 ​ ​ 565.4 ​ ​ 626.7 ​ 4.350% Senior Notes due June 2029 ​ ​ 499.7 ​ ​ 526.3 ​ ​ 499.7 ​ ​ 567.7 ​ 2.800% Senior Notes due February 2030 ​ ​ 899.5 ​ ​ 851.8 ​ ​ 899.4 ​ ​ 928.3 ​ 2.200% Senior Notes due September 2031 ​ ​ 747.4 ​ ​ 664.4 ​ ​ 747.3 ​ ​ 733.4 ​ Other debt ​ 27.1 ​ 27.1 ​ 8.6 ​ 8.6 ​ Less: unamortized deferred debt issuance costs ​ (28.8) ​ — ​ (30.7) ​ — ​ Total debt ​ 4,932.5 ​ 4,851.3 ​ 4,799.9 ​ 5,009.8 ​ Less: current portion ​ 23.7 ​ ​ 23.7 ​ 4.0 ​ 4.0 ​ Total long-term debt ​ $ 4,908.8 $ 4,827.6 $ 4,795.9 $ 5,005.8 ​ ​

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2022
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) March 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Short-term investments ​ $ 52.1 ​ $ — ​ $ 52.1 ​ $ — Long-term investments ​ ​ 55.8 ​ ​ — ​ ​ 55.8 ​ ​ — Forward contracts ​ ​ (1.1) ​ ​ — ​ ​ (1.1) ​ ​ — Redeemable noncontrolling interest ​ ​ (19.5) ​ ​ — ​ ​ — ​ ​ (19.5) Total ​ $ 87.3 ​ $ — ​ $ 106.8 ​ $ (19.5) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Short-term investments ​ $ 44.3 ​ $ 44.3 ​ $ — ​ $ — Forward contracts ​ ​ (0.4) ​ ​ — ​ ​ (0.4) ​ ​ — Redeemable noncontrolling interest ​ ​ (19.0) ​ ​ — ​ ​ — ​ ​ (19.0) Total ​ $ 24.9 ​ $ 44.3 ​ $ (0.4) ​ $ (19.0)

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2022
Income Taxes
Schedule of provision for income taxes and effective tax rate	​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ March 31, ​ ​ 2022 ​ 2021 ​ Provision for income taxes $ (134.2) ​ $ (104.1) ​ Effective tax rate 23.8 % 23.9 %

Stockholders' Equity and Nonc_2

Stockholders' Equity and Noncontrolling Interests (Tables)	3 Months Ended
	Mar. 31, 2022
Stockholders' Equity and Noncontrolling Interests
Rollforward of consolidated changes in equity	A rollforward of consolidated changes in equity and redeemable noncontrolling interest for the three months ended March 31, 2022 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amphenol Corporation Stockholders ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Accumulated ​ ​ ​ ​ ​ ​ ​ Redeemable ​ Common Stock ​ Treasury Stock ​ Additional ​ ​ ​ ​ Other ​ Non- ​ ​ ​ ​ Non- ​ Shares ​ ​ ​ ​ Shares ​ ​ ​ ​ Paid-In ​ Retained ​ Comprehensive ​ controlling ​ Total ​ controlling ​ (in millions) Amount (in millions) Amount Capital Earnings Loss Interests Equity Interest ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance as of December 31, 2021 600.7 $ 0.6 (1.6) $ (100.0) $ 2,409.0 $ 4,278.9 $ (286.5) $ 58.1 $ 6,360.1 $ 19.0 Net income ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 425.7 ​ ​ ​ ​ 3.0 ​ 428.7 ​ ​ 0.5 Other comprehensive income (loss) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (17.0) ​ — ​ (17.0) ​ ​ — Purchase of noncontrolling interest ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (0.4) ​ ​ ​ ​ ​ ​ ​ ​ (0.1) ​ ​ (0.5) ​ ​ ​ Distributions to shareholders of noncontrolling interests ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (3.1) ​ (3.1) ​ ​ ​ Purchase of treasury stock ​ ​ ​ ​ ​ (2.6) ​ (204.0) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (204.0) ​ ​ ​ Retirement of treasury stock (2.3) ​ ​ — ​ 2.3 ​ 183.0 ​ ​ ​ ​ (183.0) ​ ​ ​ ​ ​ ​ ​ — ​ ​ ​ Stock options exercised 0.3 ​ ​ — ​ 0.3 ​ ​ 20.0 ​ 10.2 ​ ​ (10.6) ​ ​ ​ ​ ​ ​ ​ 19.6 ​ ​ ​ Dividends declared ($0.20 per common share) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (119.5) ​ ​ ​ ​ ​ ​ ​ (119.5) ​ ​ ​ Stock-based compensation expense ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 19.7 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 19.7 ​ ​ ​ Balance as of March 31, 2022 598.7 ​ $ 0.6 ​ (1.6) ​ $ (101.0) ​ $ 2,438.5 ​ $ 4,391.5 ​ $ (303.5) ​ $ 57.9 ​ $ 6,484.0 ​ $ 19.5 ​ ​ A rollforward of consolidated changes in equity for the three months ended March 31, 2021 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amphenol Corporation Stockholders ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Accumulated ​ ​ ​ ​ ​ ​ ​ ​ Common Stock ​ Treasury Stock ​ Additional ​ ​ ​ ​ Other ​ Non- ​ ​ ​ ​ Shares ​ ​ ​ ​ Shares ​ ​ ​ ​ Paid-In ​ Retained ​ Comprehensive ​ controlling ​ Total ​ (in millions) Amount (in millions) Amount Capital Earnings Loss Interests Equity ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance as of December 31, 2020 ​ 600.7 $ 0.6 (2.0) $ (111.1) $ 2,068.1 $ 3,705.4 $ (278.1) $ 67.0 $ 5,451.9 Net income ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 329.6 ​ ​ ​ ​ 2.2 ​ 331.8 Other comprehensive income (loss) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (56.9) ​ (0.2) ​ (57.1) Acquisitions resulting in noncontrolling interest ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1.8 ​ 1.8 Purchase of noncontrolling interest ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2.5 ​ ​ ​ ​ ​ ​ ​ ​ (7.3) ​ ​ (4.8) Distributions to shareholders of noncontrolling interests ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (2.8) ​ (2.8) Purchase of treasury stock ​ ​ ​ ​ ​ ​ (2.4) ​ (152.8) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (152.8) Retirement of treasury stock (2.1) ​ ​ — ​ 2.1 ​ 133.0 ​ ​ ​ ​ (133.0) ​ ​ ​ ​ ​ ​ ​ — Stock options exercised 0.6 ​ ​ — ​ 0.2 ​ ​ 13.5 ​ 16.0 ​ ​ (8.3) ​ ​ ​ ​ ​ ​ ​ 21.2 Dividends declared ($0.145 per common share) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (86.6) ​ ​ ​ ​ ​ ​ ​ (86.6) Stock-based compensation expense ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 19.1 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 19.1 Balance as of March 31, 2021 ​ 599.2 ​ $ 0.6 ​ (2.1) ​ $ (117.4) ​ $ 2,105.7 ​ $ 3,807.1 ​ $ (335.0) ​ $ 60.7 ​ $ 5,521.7 ​
Schedules of dividends	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ ​ 2022 ​ 2021 ​ Dividends declared ​ $ 119.5 ​ $ 86.6 ​ Dividends paid (including those declared in the prior year) ​ 119.8 ​ 86.8 ​

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2022
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, 2022 65,300,748 ​ $ 42.00 6.47 ​ $ 2,968.8 ​ Options granted 532,721 ​ 85.92 ​ ​ ​ ​ ​ ​ Options exercised (646,759) ​ 30.24 ​ ​ ​ ​ ​ ​ Options forfeited (136,140) ​ 47.07 ​ ​ ​ ​ ​ ​ Options outstanding at March 31, 2022 65,050,570 ​ $ 42.46 6.27 ​ $ 2,145.0 ​ Vested and non-vested options expected to vest at March 31, 2022 62,416,843 ​ $ 42.14 6.20 ​ $ 2,078.2 ​ Exercisable options at March 31, 2022 33,332,906 ​ $ 35.41 4.98 ​ $ 1,331.2 ​
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, 2022 31,380,283 ​ $ 8.34 ​ Options granted 532,721 ​ 17.97 ​ Options vested (59,200) ​ 10.69 ​ Options forfeited (136,140) ​ 7.68 ​ Non-vested options at March 31, 2022 31,717,664 ​ $ 8.50 ​
Summary of activity in the option plans	​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ March 31, ​ ​ 2022 ​ 2021 Total intrinsic value of stock options exercised ​ $ 34.3 ​ $ 28.9 Total fair value of stock options vested ​ 0.6 ​ 0.4
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, 2022 21,061 ​ $ 66.92 ​ 0.38 ​ Restricted shares granted — ​ — ​ ​ ​ Restricted shares outstanding at March 31, 2022 21,061 ​ $ 66.92 0.13 ​

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2022
Earnings Per Share
Schedule of the reconciliation of basic weighted average common shares outstanding to diluted weighted average common shares outstanding	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ (dollars and shares in millions, except per share data) 2022 2021 Net income attributable to Amphenol Corporation stockholders ​ $ 425.7 ​ $ 329.6 ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted average common shares outstanding — Basic ​ 598.3 ​ 598.5 ​ Effect of dilutive stock options ​ 27.3 ​ 25.6 ​ Weighted average common shares outstanding — Diluted ​ 625.6 ​ 624.1 ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income attributable to Amphenol Corporation per common share — Basic ​ $ 0.71 ​ $ 0.55 ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income attributable to Amphenol Corporation per common share — Diluted ​ $ 0.68 ​ $ 0.53 ​

Benefit Plans and Other Postr_2

Benefit Plans and Other Postretirement Benefits (Tables)	3 Months Ended
	Mar. 31, 2022
Benefit Plans and Other Postretirement Benefits
Schedule of components of net pension expense	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension Benefits Three Months Ended March 31: 2022 2021 Service cost $ 1.5 $ 1.9 Interest cost ​ 3.5 ​ 2.8 Expected return on plan assets ​ (7.5) ​ (7.8) Amortization of prior service cost ​ 0.4 ​ 0.5 Amortization of net actuarial losses ​ 4.1 ​ 6.2 Net pension expense $ 2.0 $ 3.6

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2022
Goodwill and Other Intangible Assets
Schedule of changes in the carrying amount of goodwill by segment	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Harsh ​ ​ Interconnect ​ ​ ​ ​ Environment ​ Communications ​ and Sensor ​ ​ ​ ​ ​ Solutions ​ Solutions ​ Systems ​ Total Goodwill at December 31, 2021 ​ $ 1,663.7 ​ $ 2,950.1 ​ $ 1,763.0 ​ $ 6,376.8 ​ Acquisition-related ​ (1.1) ​ 3.4 ​ (3.4) ​ (1.1) ​ Foreign currency translation ​ (5.4) ​ (9.1) ​ (12.1) ​ (26.6) ​ Goodwill at March 31, 2022 ​ $ 1,657.2 ​ $ 2,944.4 ​ $ 1,747.5 ​ $ 6,349.1 ​
Summary of the Company's amortizable intangible assets	Other than goodwill noted above, the Company’s intangible assets as of March 31, 2022 and December 31, 2021 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2022 ​ December 31, 2021 ​ Weighted ​ Gross ​ Net Gross ​ Net ​ Average ​ Carrying ​ Accumulated ​ Carrying ​ Carrying ​ Accumulated ​ Carrying ​ Life (years) ​ Amount ​ Amortization ​ Amount ​ Amount ​ Amortization ​ Amount Customer relationships 10 ​ $ 635.4 ​ $ 368.7 ​ $ 266.7 ​ $ 637.2 ​ $ 357.5 ​ $ 279.7 Proprietary technology 13 ​ 311.0 ​ 107.6 ​ ​ 203.4 ​ 311.1 ​ 102.2 ​ ​ 208.9 Backlog and other 1 ​ 74.9 ​ 74.7 ​ ​ 0.2 ​ 74.9 ​ 74.7 ​ ​ 0.2 Total intangible assets (definite-lived) 10 ​ ​ 1,021.3 ​ ​ 551.0 ​ ​ 470.3 ​ ​ 1,023.2 ​ ​ 534.4 ​ ​ 488.8 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trade names (indefinite-lived) ​ ​ ​ 268.1 ​ ​ ​ ​ ​ 268.1 ​ ​ 268.1 ​ ​ ​ ​ ​ 268.1 ​ ​ ​ $ 1,289.4 ​ $ 551.0 ​ $ 738.4 ​ $ 1,291.3 ​ $ 534.4 ​ $ 756.9
Summary of the Company's indefinite-lived intangible assets	Other than goodwill noted above, the Company’s intangible assets as of March 31, 2022 and December 31, 2021 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2022 ​ December 31, 2021 ​ Weighted ​ Gross ​ Net Gross ​ Net ​ Average ​ Carrying ​ Accumulated ​ Carrying ​ Carrying ​ Accumulated ​ Carrying ​ Life (years) ​ Amount ​ Amortization ​ Amount ​ Amount ​ Amortization ​ Amount Customer relationships 10 ​ $ 635.4 ​ $ 368.7 ​ $ 266.7 ​ $ 637.2 ​ $ 357.5 ​ $ 279.7 Proprietary technology 13 ​ 311.0 ​ 107.6 ​ ​ 203.4 ​ 311.1 ​ 102.2 ​ ​ 208.9 Backlog and other 1 ​ 74.9 ​ 74.7 ​ ​ 0.2 ​ 74.9 ​ 74.7 ​ ​ 0.2 Total intangible assets (definite-lived) 10 ​ ​ 1,021.3 ​ ​ 551.0 ​ ​ 470.3 ​ ​ 1,023.2 ​ ​ 534.4 ​ ​ 488.8 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Trade names (indefinite-lived) ​ ​ ​ 268.1 ​ ​ ​ ​ ​ 268.1 ​ ​ 268.1 ​ ​ ​ ​ ​ 268.1 ​ ​ ​ $ 1,289.4 ​ $ 551.0 ​ $ 738.4 ​ $ 1,291.3 ​ $ 534.4 ​ $ 756.9

Reportable Business Segments (T

Reportable Business Segments (Tables)	3 Months Ended
	Mar. 31, 2022
Reportable Business Segments
Schedule of net sales, both external and intersegment, by segment	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ External ​ Intersegment Three Months Ended March 31: ​ 2022 ​ 2021 ​ 2022 ​ 2021 Harsh Environment Solutions $ 727.6 ​ $ 628.0 ​ $ 15.5 ​ $ 15.8 Communications Solutions ​ ​ 1,320.1 ​ ​ 1,028.0 ​ ​ 19.3 ​ ​ 20.8 Interconnect and Sensor Systems ​ ​ 904.2 ​ ​ 721.1 ​ ​ 5.1 ​ ​ 6.2 Consolidated Net sales ​ $ 2,951.9 ​ $ 2,377.1 ​ $ 39.9 ​ $ 42.8
Schedule of the reconciliation of segment operating income to consolidated income before income taxes	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ ​ 2022 ​ 2021 Segment operating income: ​ ​ ​ ​ ​ ​ Harsh Environment Solutions ​ $ 183.2 ​ $ 158.3 Communications Solutions ​ ​ 282.5 ​ ​ 204.5 Interconnect and Sensor Systems ​ ​ 160.0 ​ ​ 135.1 Total segment operating income ​ ​ 625.7 ​ ​ 497.9 ​ ​ ​ ​ ​ ​ ​ Corporate / Other: ​ ​ ​ ​ ​ ​ Stock-based compensation expense ​ ​ (19.7) ​ ​ (19.1) Other operating expenses ​ ​ (16.2) ​ ​ (14.0) Interest expense ​ ​ (28.1) ​ ​ (28.6) Other income (expense), net ​ ​ 1.7 ​ ​ (0.3) ​ ​ ​ ​ ​ ​ ​ Income before income taxes ​ $ 563.4 ​ $ 435.9
Schedule of depreciation and amortization expense	​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ ​ 2022 ​ 2021 Harsh Environment Solutions $ 18.4 ​ $ 18.0 Communications Solutions ​ ​ 42.0 ​ ​ 30.9 Interconnect and Sensor Systems ​ ​ 29.2 ​ ​ 26.2 Corporate / Other ​ ​ 1.5 ​ ​ 1.6 Total ​ $ 91.1 ​ $ 76.7

Revenue Recognition (Tables)

Revenue Recognition (Tables)	3 Months Ended
	Mar. 31, 2022
Revenue Recognition
Schedule of disaggregation of net sales	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Harsh ​ ​ ​ ​ ​ ​ ​ ​ Environment ​ Communications ​ Interconnect and ​ Total Reportable ​ ​ Solutions ​ Solutions ​ Sensor Systems ​ Business Segments Three Months Ended March 31, 2022 2021 2022 2021 2022 2021 ​ 2022 2021 Net sales by: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Sales channel: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ End customers and contract manufacturers ​ $ 512.1 $ 466.6 $ 1,035.5 $ 847.0 $ 874.2 $ 699.7 ​ $ 2,421.8 $ 2,013.3 Distributors and resellers ​ 215.5 ​ 161.4 ​ 284.6 ​ 181.0 ​ 30.0 ​ 21.4 ​ 530.1 ​ 363.8 ​ ​ $ 727.6 ​ $ 628.0 ​ $ 1,320.1 ​ $ 1,028.0 ​ $ 904.2 ​ $ 721.1 ​ $ 2,951.9 ​ $ 2,377.1 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Geography: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ United States ​ $ 354.8 ​ $ 316.0 ​ $ 315.8 ​ $ 190.1 ​ $ 243.3 ​ $ 167.8 ​ $ 913.9 ​ $ 673.9 China ​ 108.2 ​ 93.6 ​ 453.8 ​ 435.1 ​ 194.1 ​ 132.2 ​ ​ 756.1 ​ ​ 660.9 Other foreign locations ​ 264.6 ​ 218.4 ​ 550.5 ​ 402.8 ​ 466.8 ​ 421.1 ​ 1,281.9 ​ ​ 1,042.3 ​ ​ $ 727.6 ​ $ 628.0 ​ $ 1,320.1 ​ $ 1,028.0 ​ $ 904.2 ​ $ 721.1 ​ $ 2,951.9 ​ $ 2,377.1 ​

Basis of Presentation and Pri_3

Basis of Presentation and Principles of Consolidation (Narrative) (Details) - segment	Jan. 01, 2022	Mar. 31, 2022
Basis of Presentation and Principles of Consolidation
Number of reportable business segments	3	3

Inventories (Details)

Inventories (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Inventories
Raw materials and supplies	$ 867.9	$ 818.4
Work in process	562.4	511.5
Finished goods	559.4	564.2
Inventories	$ 1,989.7	$ 1,894.1

Debt, Schedule of Debt (Details

Debt, Schedule of Debt (Details) € in Millions, $ in Millions	Mar. 31, 2022USD ($)	Mar. 31, 2022EUR (€)	Dec. 31, 2021USD ($)	Sep. 14, 2021
Debt
Less deferred debt issuance costs	$ (28.8)		$ (30.7)
Less deferred debt issuance costs, fair value
Total debt	4,932.5		4,799.9
Less current portion	23.7		4
Total long-term debt	4,908.8		4,795.9
Total debt, Approximate Fair Value	4,851.3		5,009.8
Less current portion, Fair Value	23.7		4
Long-term debt, Approximate Fair Value	4,827.6		5,005.8
The "Revolving Credit Facility" | Revolving Credit Facility
Debt
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs	0		0
Total debt, Approximate Fair Value	0		0
U.S. Commercial Paper Program
Debt
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs	933.5		795.2
Total debt, Approximate Fair Value	933.5		795.2
Euro Commercial Paper Program
Debt
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs	0	€ 0	0
Total debt, Approximate Fair Value	$ 0		$ 0
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 or premium before deferred debt issuance costs	$ 349.9		$ 349.9
Total debt, Approximate Fair Value	$ 351.9		$ 363.5
2.05% Senior Notes due March 2025
Debt
Stated interest rate (as a percent)	2.05%	2.05%	2.05%
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs	$ 399.6		$ 399.6
Total debt, Approximate Fair Value	$ 388.8		$ 407.4
0.750% Euro Senior Notes due May 2026
Debt
Stated interest rate (as a percent)	0.75%	0.75%	0.75%
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs	$ 552.4		$ 565.5
Total debt, Approximate Fair Value	$ 542.9		$ 579
2.000% Euro Senior Notes due October 2028
Debt
Stated interest rate (as a percent)	2.00%	2.00%	2.00%
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs	$ 552.2		$ 565.4
Total debt, Approximate Fair Value	$ 564.6		$ 626.7
4.350% Senior Notes due June 2029
Debt
Stated interest rate (as a percent)	4.35%	4.35%	4.35%
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs	$ 499.7		$ 499.7
Total debt, Approximate Fair Value	$ 526.3		$ 567.7
2.800% Senior Notes due February 2030
Debt
Stated interest rate (as a percent)	2.80%	2.80%	2.80%
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs	$ 899.5		$ 899.4
Total debt, Approximate Fair Value	$ 851.8		$ 928.3
2.200% Senior Notes due September 2031
Debt
Stated interest rate (as a percent)	2.20%	2.20%	2.20%	2.20%
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs	$ 747.4		$ 747.3
Total debt, Approximate Fair Value	664.4		733.4
Other Debt [Member]
Debt
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs	27.1		8.6
Total debt, Approximate Fair Value	$ 27.1		$ 8.6

Debt, Revolving Credit Facility

Debt, Revolving Credit Facility (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Debt
Debt instrument, covenant compliance	On March 31, 2022, the Company was in compliance with all requirements under its Senior Notes
The "Revolving Credit Facility"
Debt
Maximum borrowing capacity	$ 2,500
Borrowings under the Revolving Credit Facility	$ 0	$ 0
Debt instrument, covenant compliance	On March 31, 2022, the Company was in compliance with the financial covenants under the Revolving Credit Facility

Debt, Term Loan Credit Facility

Debt, Term Loan Credit Facility (Details) - Subsequent Event - 2022 Term Loan $ in Millions	Apr. 19, 2022USD ($)loan	Apr. 26, 2022USD ($)
Debt
Maximum borrowing capacity	$ 750
Borrowings under the uncommitted line of credit		$ 0
Maturity term	2 years
Debt maturity date	Apr. 19, 2024
Number of occasions allowed to borrow over the life of the facility | loan	5

Debt, Commercial Paper (Details

Debt, Commercial Paper (Details) € in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022EUR (€)item	Mar. 31, 2022USD ($)item	Dec. 31, 2021USD ($)
Commercial Paper Programs and Revolving Credit Facility [Member]
Debt
Maximum borrowing capacity		$ 2,500
U.S. Commercial Paper Program
Debt
Average interest rate (as a percent)	0.95%	0.95%
Debt carrying amount, net of unamortized discount before deferred debt issuance costs		$ 933.5	$ 795.2
Maximum borrowing capacity		$ 2,500
U.S. Commercial Paper Program | Maximum
Debt
Maturity term	397 days
Euro Commercial Paper Program
Debt
Number of wholly-owned subsidiaries that entered into a euro-commercial paper program | item	1	1
Debt carrying amount, net of unamortized discount before deferred debt issuance costs	€ 0	$ 0	$ 0
Maximum borrowing capacity		$ 2,000
Euro Commercial Paper Program | Maximum
Debt
Maturity term	183 days

Debt, U.S. Senior Notes (Detail

Debt, U.S. Senior Notes (Details) - USD ($) $ in Millions	Sep. 14, 2021	Mar. 31, 2022	Dec. 31, 2021
Debt
Debt instrument, covenant compliance		On March 31, 2022, the Company was in compliance with all requirements under its Senior Notes
U.S. Senior Notes
Debt
Redemption price as a percentage of principal amount		100.00%
2.200% Senior Notes due September 2031
Debt
Redemption price as a percentage of principal amount	100.00%
Debt instrument, principal amount	$ 750
Stated interest rate (as a percent)	2.20%	2.20%	2.20%
Debt instrument, face amount, net of discount (as a percent)	99.634%
Debt maturity date		Sep. 15, 2031

Debt, Euro Senior Notes (Detail

Debt, Euro Senior Notes (Details) € in Millions	3 Months Ended
	Mar. 31, 2022EUR (€)loan
Debt
Debt instrument, covenant compliance	On March 31, 2022, the Company was in compliance with all requirements under its Senior Notes
Euro Notes [Member]
Debt
Number of outstanding notes | loan	2
Redemption price as a percentage of principal amount	100.00%
0.750% Euro Senior Notes Due May 2026 [Member]
Debt
Debt instrument, principal amount	€ 500
Stated interest rate (as a percent)	0.75%
Debt maturity date	May 4, 2026
Debt instrument, face amount, net of discount (as a percent)	99.563%
2.000% Euro Senior Notes due October 2028 [Member]
Debt
Debt instrument, principal amount	€ 500
Stated interest rate (as a percent)	2.00%
Debt maturity date	Oct. 8, 2028
Debt instrument, face amount, net of discount (as a percent)	99.498%

Fair Value Measurements (Detail

Fair Value Measurements (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022USD ($)contract	Dec. 31, 2021USD ($)
Cash Flow Hedging
Fair value of assets and liabilities measured on recurring basis
Number of forward contracts | contract	2
Maximum
Fair value of assets and liabilities measured on recurring basis
Long-term investments maturity period	2 years
Maximum | Cash Flow Hedging
Fair value of assets and liabilities measured on recurring basis
Hedge expiration period	1 year
Fair value measurements recurring basis
Fair value of assets and liabilities measured on recurring basis
Short-term investments	$ 52.1	$ 44.3
Long-term investments	55.8
Forward contracts	(1.1)	(0.4)
Redeemable noncontrolling interest	(19.5)	(19)
Total asset	87.3	24.9
Fair value measurements recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair value of assets and liabilities measured on recurring basis
Short-term investments	0	44.3
Long-term investments	0
Forward contracts	0	0
Redeemable noncontrolling interest	0	0
Total asset	0	44.3
Fair value measurements recurring basis | Significant Observable Inputs (Level 2)
Fair value of assets and liabilities measured on recurring basis
Short-term investments	52.1	0
Long-term investments	55.8
Forward contracts	(1.1)	(0.4)
Redeemable noncontrolling interest	0	0
Total liability		(0.4)
Total asset	106.8
Fair value measurements recurring basis | Significant Unobservable Inputs (Level 3)
Fair value of assets and liabilities measured on recurring basis
Short-term investments	0	0
Long-term investments	0
Forward contracts	0	0
Redeemable noncontrolling interest	(19.5)	(19)
Total liability	$ (19.5)	$ (19)

Income Taxes, Provision and Eff

Income Taxes, Provision and Effective tax rate (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Taxes
Provision for income taxes	$ (134.2)	$ (104.1)
Effective tax rate	23.80%	23.90%
Excess tax benefit from option exercises	$ 3.8	$ 2.6
Excess tax benefit, impact on effective tax rate	(0.70%)	(0.60%)

Income Taxes, 2017 Tax Cuts and

Income Taxes, 2017 Tax Cuts and Jobs Act (Details)	3 Months Ended
	Mar. 31, 2022
Income Taxes
Period for payment of Transition Tax	8 years

Income Taxes, Unrecognized tax

Income Taxes, Unrecognized tax benefits (Details) $ in Millions	Mar. 31, 2022USD ($)
Income Taxes
Unrecognized tax benefits, anticipated adjustment for changing facts and circumstances, over the next twelve month period	$ 13.1
Amount for unrecognized tax benefits, including penalties and interest, which if recognized would impact the effective tax rate	$ 183.1

Stockholders' Equity and Nonc_3

Stockholders' Equity and Noncontrolling Interests (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	Oct. 26, 2021	Oct. 25, 2021	Mar. 31, 2022	Mar. 31, 2021
Increase (Decrease) In Stockholders' Equity
Balance at beginning of period			$ 6,360.1	$ 5,451.9
Redeemable noncontrolling interest, balance at beginning of period			19
Net income, excluding portion attributable to redeemable noncontrolling interest			428.7
Net income			429.2	331.8
Other comprehensive income (loss)			(17)	(57.1)
Acquisitions resulting in noncontrolling interest				1.8
Purchase of noncontrolling interest			(0.5)	(4.8)
Distributions to shareholders of noncontrolling interests			(3.1)	(2.8)
Purchase of treasury stock			(204)	(152.8)
Retirement of treasury stock			0	0
Stock options exercised			19.6	21.2
Dividends declared			(119.5)	(86.6)
Stock-based compensation expense			19.7	19.1
Balance at end of period			6,484	$ 5,521.7
Redeemable noncontrolling interest, balance at end of period			$ 19.5
Dividends [Abstract]
Dividends declared per share (in dollars per share)	$ 0.20	$ 0.145	$ 0.20	$ 0.145
Redeemable Non-Controlling Interest [Member]
Increase (Decrease) In Stockholders' Equity
Redeemable noncontrolling interest, balance at beginning of period			$ 19
Net income, redeemable non-controlling interest			0.5
Redeemable noncontrolling interest, other comprehensive income loss net of tax			0
Redeemable noncontrolling interest, balance at end of period			$ 19.5
Common Stock
Increase (Decrease) In Stockholders' Equity
Balance (in shares)			600.7	600.7
Balance at beginning of period			$ 0.6	$ 0.6
Retirement of treasury stock			$ 0	$ 0
Retirement of treasury stock (in shares)			(2.3)	(2.1)
Stock options exercised			$ 0	$ 0
Stock options exercised (in shares)			0.3	0.6
Balance (in shares)			598.7	599.2
Balance at end of period			$ 0.6	$ 0.6
Additional Paid in Capital
Increase (Decrease) In Stockholders' Equity
Balance at beginning of period			2,409	2,068.1
Purchase of noncontrolling interest			(0.4)	2.5
Stock options exercised			10.2	16
Stock-based compensation expense			19.7	19.1
Balance at end of period			2,438.5	2,105.7
Retained Earnings
Increase (Decrease) In Stockholders' Equity
Balance at beginning of period			4,278.9	3,705.4
Net income, excluding portion attributable to redeemable noncontrolling interest			425.7
Net income				329.6
Retirement of treasury stock			(183)	(133)
Stock options exercised			(10.6)	(8.3)
Dividends declared			(119.5)	(86.6)
Balance at end of period			4,391.5	3,807.1
Accumulated Other Comprehensive Loss
Increase (Decrease) In Stockholders' Equity
Balance at beginning of period			(286.5)	(278.1)
Other comprehensive income (loss)			(17)	(56.9)
Balance at end of period			(303.5)	(335)
Treasury Stock
Increase (Decrease) In Stockholders' Equity
Balance at beginning of period			$ (100)	$ (111.1)
Balance (in shares)			(1.6)	(2)
Purchase of treasury stock			$ (204)	$ (152.8)
Purchase of treasury stock (in shares)			(2.6)	(2.4)
Retirement of treasury stock			$ 183	$ 133
Retirement of treasury stock (in shares)			2.3	2.1
Stock options exercised			$ 20	$ 13.5
Stock options exercised (in shares)			0.3	0.2
Balance at end of period			$ (101)	$ (117.4)
Balance (in shares)			(1.6)	(2.1)
Noncontrolling Interests
Increase (Decrease) In Stockholders' Equity
Balance at beginning of period			$ 58.1	$ 67
Net income, excluding portion attributable to redeemable noncontrolling interest			3
Net income				2.2
Other comprehensive income (loss)			0	(0.2)
Acquisitions resulting in noncontrolling interest				1.8
Purchase of noncontrolling interest			(0.1)	(7.3)
Distributions to shareholders of noncontrolling interests			(3.1)	(2.8)
Balance at end of period			$ 57.9	$ 60.7

Stockholders' Equity and Nonc_4

Stockholders' Equity and Noncontrolling Interests, Stock Repurchase (Details) - USD ($) shares in Millions, $ in Millions	Apr. 27, 2021	Apr. 24, 2018	Apr. 26, 2022	Mar. 31, 2022	Mar. 31, 2021
Stockholders' Equity
Treasury stock retired (in dollars)				$ 0	$ 0
Payments for shares repurchased and retained in treasury (in dollars)				$ 204	$ 152.8
2021 Stock Repurchase Program
Stockholders' Equity
Value of shares authorized to be repurchased (in dollars)	$ 2,000
Repurchase of stock program, period	3 years
Number of shares repurchased				2.6
Payments for shares repurchased (in dollars)				$ 204
Number of shares repurchased and retained in treasury				0.3
Payments for shares repurchased and retained in treasury (in dollars)				$ 21
Number of shares repurchased and retired				2.3
Payments for shares repurchased and retired (in dollars)				$ 183
2018 Stock Repurchase Program
Stockholders' Equity
Value of shares authorized to be repurchased (in dollars)		$ 2,000
Repurchase of stock program, period		3 years
Number of shares repurchased					2.4
Payments for shares repurchased (in dollars)					$ 152.8
Number of shares repurchased and retained in treasury					0.3
Payments for shares repurchased and retained in treasury (in dollars)					$ 19.8
Number of shares repurchased and retired					2.1
Payments for shares repurchased and retired (in dollars)					$ 133
Subsequent Event | 2021 Stock Repurchase Program
Stockholders' Equity
Number of shares repurchased and retained in treasury			0.7
Payments for shares repurchased and retained in treasury (in dollars)			$ 51
Value of shares remaining that may be repurchased under the stock repurchase program (in dollars)			$ 1,287.1

Stockholders' Equity and Nonc_5

Stockholders' Equity and Noncontrolling Interests, Dividends (Details) - USD ($) $ / shares in Units, $ in Millions	Oct. 26, 2021	Oct. 25, 2021	Mar. 31, 2022	Mar. 31, 2021
Stockholders' Equity and Noncontrolling Interests
Dividends declared per share (in dollars per share)	$ 0.20	$ 0.145	$ 0.20	$ 0.145
Dividends declared			$ 119.5	$ 86.6
Dividends paid (including those declared in the prior year)			$ 119.8	$ 86.8

Stock-Based Compensation, Stock

Stock-Based Compensation, Stock-based Comp Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Stock-Based Compensation
Expense incurred for stock-based compensation plans	$ 19.7	$ 19.1
Recognized tax benefit related to stock-based compensation	5.8	4.5
Excess tax benefit from option exercises	$ 3.8	$ 2.6

Stock-Based Compensation, Sto_2

Stock-Based Compensation, Stock Options (Details) - shares	May 19, 2021	Mar. 31, 2022	May 18, 2021
2009 Employee Option Plan
Stock-Based Compensation
Additional shares available for the granting of stock options		0
Options ratable vesting period		5 years
Options exercisable period		10 years
2017 Option Plan
Stock-Based Compensation
Additional shares available for the granting of stock options	40,000,000
Number of shares originally authorized for issuance of stock options under stock option plan			60,000,000
Remaining shares available for the granting of stock options under plan		42,881,160
Options ratable vesting period		5 years
Options exercisable period		10 years

Stock-Based Compensation, Sto_3

Stock-Based Compensation, Stock Option Activity (Details) - Stock Options - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Stock option activity
Options outstanding at the beginning of the period (in shares)	65,300,748
Non-vested options, options granted (in shares)	532,721
Options exercised (in shares)	(646,759)
Options forfeited (in shares)	(136,140)
Options outstanding at the end of the period (in shares)	65,050,570	65,300,748
Vested and non-vested options expected to vest at the end of the period (in shares)	62,416,843
Exercisable at the end of the period (in shares)	33,332,906
Weighted Average Exercise Price
Weighted average exercise price, options outstanding at the beginning of the period (in dollars per share)	$ 42
Weighted average exercise price, options granted (in dollars per share)	85.92
Weighted average exercise price, options exercised (in dollars per share)	30.24
Weighted average exercise price, options forfeited (in dollars per share)	47.07
Weighted average exercise price, options outstanding at the end of the period (in dollars per share)	42.46	$ 42
Weighted average exercise price, vested and non-vested options expected to vest (in dollars per share)	42.14
Weighted average exercise price, exercisable (in dollars per share)	$ 35.41
Weighted Average Remaining Contractual Term
Weighted average remaining contractual term of options outstanding	6 years 3 months 7 days	6 years 5 months 19 days
Weighted average remaining contractual term of options vested options and non-vested expected to vest	6 years 2 months 12 days
Weighted average remaining contractual term of options exercisable	4 years 11 months 23 days
Aggregate Intrinsic Value
Aggregate intrinsic value of options outstanding	$ 2,145	$ 2,968.8
Aggregate intrinsic value of options, vested and non-vested options expected to vest	2,078.2
Aggregate intrinsic value of options exercisable	$ 1,331.2

Stock-Based Compensation, Non-V

Stock-Based Compensation, Non-Vested Stock Option Activity (Details) - Stock Options	3 Months Ended
	Mar. 31, 2022$ / sharesshares
Status of the Company's non-vested options and changes during the year
Non-vested options at the beginning of the period (in shares) | shares	31,380,283
Non-vested options, options granted (in shares) | shares	532,721
Non-vested options, options vested (in shares) | shares	(59,200)
Non-vested options, options forfeited (in shares) | shares	(136,140)
Non-vested options at the end of the period (in shares) | shares	31,717,664
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) | $ / shares	$ 8.34
Weighted average fair value at grant date, options granted (in dollars per share) | $ / shares	17.97
Weighted average fair value at grant date, options vested (in dollars per share) | $ / shares	10.69
Weighted average fair value at grant date, options forfeited (in dollars per share) | $ / shares	7.68
Weighted average fair value at the grant date, options outstanding at the end of the period (in dollars per share) | $ / shares	$ 8.50

Stock-Based Compensation, Optio

Stock-Based Compensation, Option Plans (Details) - Stock Options - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Stock-Based Compensation
Total intrinsic value of stock options exercised (in dollars)	$ 34.3	$ 28.9
Total fair value of stock options vested (in dollars)	0.6	$ 0.4
Total compensation cost related to non-vested options not yet recognized (in dollars)	$ 187.8
Weighted average expected amortization period	3 years 3 months 3 days

Stock-Based Compensation, Restr

Stock-Based Compensation, Restricted Shares (Details) - Restricted Shares - 2012 Directors Restricted Stock Plan - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Stock-Based Compensation
Remaining shares available for the granting of stock options under plan	141,359
Restricted share activity
Restricted shares outstanding at the beginning of the period (in shares)	21,061
Restricted shares granted (in shares)	0
Restricted shares outstanding at the end of the period (in shares)	21,061	21,061
Fair Value at Grant Date
Fair value at the grant date, restricted shares outstanding at the beginning of the period (in dollars per share)	$ 66.92
Fair value of restricted shares granted (in dollars per share)	0
Fair value at the grant date, restricted shares outstanding at the end of the period (in dollars per share)	$ 66.92	$ 66.92
Weighted Average Remaining Amortization Term (in years)	1 month 17 days	4 months 17 days
Total compensation cost related to non-vested restricted shares not yet recognized (in dollars)	$ 0.2
Weighted average expected amortization period	1 month 17 days

Earnings Per Share, Reconciliat

Earnings Per Share, Reconciliation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share
Net income attributable to Amphenol Corporation	$ 425.7	$ 329.6
Weighted average common shares outstanding - Basic (in shares)	598.3	598.5
Effect of dilutive stock options (in shares)	27.3	25.6
Weighted average common shares outstanding - Diluted (in shares)	625.6	624.1
Net income (loss) attributable to Amphenol Corporation per common share - Basic:
Net income attributable to Amphenol Corporation per common share - Basic	$ 0.71	$ 0.55
Net income (loss) attributable to Amphenol Corporation per common share - Diluted:
Net income attributable to Amphenol Corporation per common share - Diluted	$ 0.68	$ 0.53
Anti-dilutive common shares
Anti-dilutive stock options, excluded from the computations of earnings per share (in shares)	4.1	0.1

Benefit Plans and Other Postr_3

Benefit Plans and Other Postretirement Benefits, Net pension expense (Details) - Pension Benefits - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Components of net pension expense:
Service cost	$ 1.5	$ 1.9
Interest cost	3.5	2.8
Expected return on plan assets	(7.5)	(7.8)
Amortization of prior service cost	0.4	0.5
Amortization of net actuarial losses	4.1	6.2
Net pension expense	2	$ 3.6
United States
Defined Benefit Plan Disclosure
Estimated future employer contribution in fiscal year	$ 0
Weighted average assumptions used to determine net periodic benefit cost/expense:
Expected long-term return on assets (as a percent)	5.50%

Benefit Plans and Other Postr_4

Benefit Plans and Other Postretirement Benefits, Defined contribution plans (Details) - United States - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Defined Contribution Plan Disclosure
Contributions to U.S. defined contribution plans by the Company, maximum percentage of eligible compensation	6.00%
Matching contributions to U.S. defined contribution plans by the Company	$ 5.3	$ 4.4

Acquisitions (Details)

Acquisitions (Details) $ in Millions	Jan. 01, 2022segment	Dec. 01, 2021USD ($)	Apr. 07, 2021USD ($)	Dec. 09, 2020segment	Mar. 31, 2022USD ($)agreementsegment	Mar. 31, 2021USD ($)	Dec. 31, 2021USD ($)agreement
Acquisitions
Number of reportable business segments | segment	3				3
Number of acquisitions | agreement							7
Number of acquisitions whose acquisition accounting has not yet been completed | agreement					3
Purchase price, net of cash acquired					$ 0	$ 185.6	$ 2,225.4
Goodwill					$ 6,349.1		6,376.8
Number of acquisitions for which acquisition accounting has been completed | agreement					4
MTS Systems Corporation and Other 2021 Acquisitions [Member]
Acquisitions
Acquisition-related expenses							70.4
Acquisition-related expenses, net of tax							$ 57.3
Divested MTS business (including T&S, excluding Sensors business) [Member]
Acquisitions
Contingent consideration			$ 28.7
Proceeds from sale of business		$ 750
MTS Systems Corporation
Acquisitions
Business acquisition, effective date			Apr. 7, 2021
Number of reportable business segments | segment				2
Purchase price, net of cash acquired			$ 1,300
Total enterprise value of Acquiree (aggregate purchase price, net of cash acquired and including the repayment of all outstanding debt and certain liabilities)			$ 1,700
Percentage acquired			100.00%
Senior note assumed in business acquisition			$ 350
Senior note assumed from business acquisition and repaid and settled shortly after closing, including accrued interest and make-whole premium			387.3
Deferred tax liability			$ 47
MTS Sensors [Member]
Acquisitions
Purchase price of retained business, net of cash acquired and net of proceeds received from divested business.		$ 950
Goodwill					$ 737.8
Goodwill deductible for tax purposes					0
Indefinite-lived intangible assets					54
Definite-lived intangible assets					178.2
Halo Technology Ltd [Member]
Acquisitions
Business acquisition, effective date		Dec. 1, 2021
Purchase price, net of cash acquired		$ 694
Percentage acquired		97.00%
Goodwill					530.7
Goodwill deductible for tax purposes					0
Indefinite-lived intangible assets					28
Definite-lived intangible assets					156
Customer relationships | MTS Sensors [Member]
Acquisitions
Definite-lived intangible assets					$ 122.9
Useful lives					11 years
Customer relationships | Halo Technology Ltd [Member]
Acquisitions
Definite-lived intangible assets					$ 31
Useful lives					10 years
Proprietary technology | MTS Sensors [Member]
Acquisitions
Definite-lived intangible assets					$ 39.1
Useful lives					15 years
Proprietary technology | Halo Technology Ltd [Member]
Acquisitions
Definite-lived intangible assets					$ 116
Useful lives					15 years
Backlog | MTS Sensors [Member]
Acquisitions
Definite-lived intangible assets					$ 16.2
Useful lives					3 months
Backlog | Halo Technology Ltd [Member]
Acquisitions
Definite-lived intangible assets					$ 9
Useful lives					1 month
Harsh Environment Solutions
Acquisitions
Number of acquisitions | agreement							1
Goodwill					$ 1,657.2		$ 1,663.7
Interconnect and Sensor Systems
Acquisitions
Number of acquisitions | agreement							3
Goodwill					1,747.5		$ 1,763
Communications Solutions
Acquisitions
Number of acquisitions | agreement							3
Goodwill					$ 2,944.4		$ 2,950.1
Halo Technology Limited [Member] | Maximum
Acquisitions
Noncontrolling interest, ownership percentage by noncontrolling owners		3.00%

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets, Goodwill (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022USD ($)
Goodwill.
Goodwill, Beginning Balance	$ 6,376.8
Acquisition-related	(1.1)
Foreign currency translation	(26.6)
Goodwill, Ending Balance	6,349.1
Harsh Environment Solutions
Goodwill.
Goodwill, Beginning Balance	1,663.7
Acquisition-related	(1.1)
Foreign currency translation	(5.4)
Goodwill, Ending Balance	1,657.2
Communications Solutions
Goodwill.
Goodwill, Beginning Balance	2,950.1
Acquisition-related	3.4
Foreign currency translation	(9.1)
Goodwill, Ending Balance	2,944.4
Interconnect and Sensor Systems
Goodwill.
Goodwill, Beginning Balance	1,763
Acquisition-related	(3.4)
Foreign currency translation	(12.1)
Goodwill, Ending Balance	$ 1,747.5

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets, Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Intangible Assets
Weighted average useful lives of acquired amortizable intangible assets	10 years
Gross Carrying Amount (definite-lived)	$ 1,021.3	$ 1,023.2
Accumulated Amortization	551	534.4
Net Carrying Amount, (definite-lived)	470.3	488.8
Indefinite-lived trade name intangible asset	268.1	268.1
Intangible assets, gross (excluding goodwill)	1,289.4	1,291.3
Net Carrying Amount, intangible assets	$ 738.4	756.9
Customer relationships
Intangible Assets
Weighted average useful lives of acquired amortizable intangible assets	10 years
Gross Carrying Amount (definite-lived)	$ 635.4	637.2
Accumulated Amortization	368.7	357.5
Net Carrying Amount, (definite-lived)	$ 266.7	279.7
Proprietary technology
Intangible Assets
Weighted average useful lives of acquired amortizable intangible assets	13 years
Gross Carrying Amount (definite-lived)	$ 311	311.1
Accumulated Amortization	107.6	102.2
Net Carrying Amount, (definite-lived)	$ 203.4	208.9
Backlog and other
Intangible Assets
Weighted average useful lives of acquired amortizable intangible assets	1 year
Gross Carrying Amount (definite-lived)	$ 74.9	74.9
Accumulated Amortization	74.7	74.7
Net Carrying Amount, (definite-lived)	$ 0.2	$ 0.2

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets, Amortization (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Goodwill and Other Intangible Assets
Amortization expense	$ 18	$ 12.3
Amortization expense estimated for each of the next five fiscal years
Remainder of 2022	49.9
2023	64.6
2024	59
2025	49.7
2026	47.9
2027	$ 41.2

Reportable Business Segments, N

Reportable Business Segments, Net sales by segment (Details) $ in Millions	Jan. 01, 2022segmententity	Mar. 31, 2022USD ($)segment	Mar. 31, 2021USD ($)
Segment reporting information
Number of reportable business segments | segment	3	3
Number of segment managers | entity	3
Net sales		$ 2,951.9	$ 2,377.1
Harsh Environment Solutions
Segment reporting information
Net sales		727.6	628
Communications Solutions
Segment reporting information
Net sales		1,320.1	1,028
Interconnect and Sensor Systems
Segment reporting information
Net sales		904.2	721.1
Communications Solutions, Interconnect and Sensor Systems, Harsh Environment Solutions [Member]
Segment reporting information
Number of reportable business segments in which businesses previously reported in the Interconnect Products and Assemblies segment have now been aligned to. | segment	1
Operating Segment
Segment reporting information
Net sales		2,951.9	2,377.1
Operating Segment | Harsh Environment Solutions
Segment reporting information
Net sales		727.6	628
Operating Segment | Communications Solutions
Segment reporting information
Net sales		1,320.1	1,028
Operating Segment | Interconnect and Sensor Systems
Segment reporting information
Net sales		904.2	721.1
Inter-Segment
Segment reporting information
Net sales		39.9	42.8
Inter-Segment | Harsh Environment Solutions
Segment reporting information
Net sales		15.5	15.8
Inter-Segment | Communications Solutions
Segment reporting information
Net sales		19.3	20.8
Inter-Segment | Interconnect and Sensor Systems
Segment reporting information
Net sales		$ 5.1	$ 6.2

Reportable Business Segments, R

Reportable Business Segments, Reconciliation of Segment Operating Income to Consolidated Income Before Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information
Operating income	$ 589.8	$ 464.8
Stock-based compensation expense	(19.7)	(19.1)
Other operating expenses	(16.2)	(14)
Interest expense	(28.1)	(28.6)
Other income (expense), net	1.7	(0.3)
Income before income taxes	563.4	435.9
Operating Segment
Segment Reporting Information
Operating income	625.7	497.9
Operating Segment | Harsh Environment Solutions
Segment Reporting Information
Operating income	183.2	158.3
Operating Segment | Communications Solutions
Segment Reporting Information
Operating income	282.5	204.5
Operating Segment | Interconnect and Sensor Systems
Segment Reporting Information
Operating income	$ 160	$ 135.1

Reportable Business Segments, D

Reportable Business Segments, Depreciation & Amortization by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment reporting information
Depreciation and amortization	$ 91.1	$ 76.7
Harsh Environment Solutions
Segment reporting information
Depreciation and amortization	18.4	18
Communications Solutions
Segment reporting information
Depreciation and amortization	42	30.9
Interconnect and Sensor Systems
Segment reporting information
Depreciation and amortization	29.2	26.2
Corporate and Other
Segment reporting information
Depreciation and amortization	$ 1.5	$ 1.6

Revenue Recognition (Details)

Revenue Recognition (Details) - item	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue recognition
Remaining performance obligation, expected timing for substantial portion of performance obligations	3 months
Practical expedient, performance obligation	true
Minimum
Revenue recognition
Number of reporting periods that may be extended across for multiple delivery dates	1
Maximum
Revenue recognition
Percentage of net sales recognized over time	5.00%	5.00%
Remaining performance obligation, expected timing for nearly all performance obligations	1 year

Revenue Recognition, Disaggrega

Revenue Recognition, Disaggregation of Net Sales (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue recognition
Net sales	$ 2,951.9	$ 2,377.1
United States
Revenue recognition
Net sales	913.9	673.9
China
Revenue recognition
Net sales	756.1	660.9
Other foreign locations
Revenue recognition
Net sales	1,281.9	1,042.3
End customers and contract manufacturers
Revenue recognition
Net sales	2,421.8	2,013.3
Distributors and resellers
Revenue recognition
Net sales	530.1	363.8
Harsh Environment Solutions
Revenue recognition
Net sales	727.6	628
Harsh Environment Solutions | United States
Revenue recognition
Net sales	354.8	316
Harsh Environment Solutions | China
Revenue recognition
Net sales	108.2	93.6
Harsh Environment Solutions | Other foreign locations
Revenue recognition
Net sales	264.6	218.4
Harsh Environment Solutions | End customers and contract manufacturers
Revenue recognition
Net sales	512.1	466.6
Harsh Environment Solutions | Distributors and resellers
Revenue recognition
Net sales	215.5	161.4
Communications Solutions
Revenue recognition
Net sales	1,320.1	1,028
Communications Solutions | United States
Revenue recognition
Net sales	315.8	190.1
Communications Solutions | China
Revenue recognition
Net sales	453.8	435.1
Communications Solutions | Other foreign locations
Revenue recognition
Net sales	550.5	402.8
Communications Solutions | End customers and contract manufacturers
Revenue recognition
Net sales	1,035.5	847
Communications Solutions | Distributors and resellers
Revenue recognition
Net sales	284.6	181
Interconnect and Sensor Systems
Revenue recognition
Net sales	904.2	721.1
Interconnect and Sensor Systems | United States
Revenue recognition
Net sales	243.3	167.8
Interconnect and Sensor Systems | China
Revenue recognition
Net sales	194.1	132.2
Interconnect and Sensor Systems | Other foreign locations
Revenue recognition
Net sales	466.8	421.1
Interconnect and Sensor Systems | End customers and contract manufacturers
Revenue recognition
Net sales	874.2	699.7
Interconnect and Sensor Systems | Distributors and resellers
Revenue recognition
Net sales	$ 30	$ 21.4

Commitments and Contingencies (

Commitments and Contingencies (Details) € in Millions	3 Months Ended	11 Months Ended
	Mar. 31, 2022EUR (€)	Oct. 31, 2020lawsuit
Commitments and Contingencies
Number of lawsuits | lawsuit		4
Domicile of litigation		Indiana
Customer's claimed damages that is subject to arbitrator discretion to determine actual amount of damages and apportionment of responsibility | €	€ 112