IDEX (IEX) 10-Q 30 Oct 24 2024 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2024	Oct. 25, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
Document Transition Report	false
Entity File Number	1-10235
Entity Registrant Name	IDEX CORP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	36-3555336
Entity Address, Address Line One	3100 Sanders Road,
Entity Address, Address Line Two	Suite 301,
Entity Address, City or Town	Northbrook,
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60062
City Area Code	847
Local Phone Number	498-7070
Title of 12(b) Security	Common Stock, par value $.01 per share
Trading Symbol	IEX
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		75,723,308
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Entity Central Index Key	0000832101
Current Fiscal Year End Date	--12-31

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Net sales	$ 798.2	$ 793.4	$ 2,405.9	$ 2,485
Cost of sales	444.3	443.8	1,327.8	1,374.9
Gross profit	353.9	349.6	1,078.1	1,110.1
Selling, general and administrative expenses	182.9	165.9	560.8	529.9
Restructuring expenses and asset impairments	3	4.1	5.4	8.2
Operating income	168	179.6	511.9	572
Gain on sale of business	0.6	(93.8)	(4)	(93.8)
Other expense (income) – net	2.7	(2.1)	0	5.6
Interest expense – net	10.3	13.7	27.8	40.1
Income before income taxes	154.4	261.8	488.1	620.1
Provision for income taxes	35.5	52.8	106.7	132.8
Net income	118.9	209	381.4	487.3
Net loss attributable to noncontrolling interest	0.2	0.1	0.4	0.2
Net income attributable to IDEX	$ 119.1	$ 209.1	$ 381.8	$ 487.5
Earnings per common share:
Basic earnings per common share attributable to IDEX (in dollars per share)	$ 1.57	$ 2.76	$ 5.03	$ 6.44
Diluted earnings per common share attributable to IDEX (in dollars per share)	$ 1.57	$ 2.75	$ 5.02	$ 6.42
Share data:
Basic weighted average common shares outstanding (in shares)	75.7	75.6	75.7	75.6
Diluted weighted average common shares outstanding (in shares)	75.9	75.9	75.9	75.9

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 118.9	$ 209	$ 381.4	$ 487.3
Other comprehensive income (loss):
Pension and other postretirement adjustments, net of tax of $0.1, $—, $0.2 and $0.2, respectively	(0.1)	(0.3)	(0.4)	(0.8)
Cumulative translation adjustment	91.8	(58.1)	21.5	(19.2)
Other comprehensive income (loss), net of tax	91.7	(58.4)	21.1	(20)
Comprehensive income	210.6	150.6	402.5	467.3
Comprehensive loss attributable to noncontrolling interest	0.2	0.1	0.4	0.2
Comprehensive income attributable to IDEX	$ 210.8	$ 150.7	$ 402.9	$ 467.5

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Pension and other postretirement adjustments, tax	$ 0.1	$ 0	$ 0.2	$ 0.2

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 633.2	$ 534.3
Receivables – net	475.1	427.8
Inventories – net	488.2	420.8
Other current assets	81.3	63.4
Total current assets	1,677.8	1,446.3
Property, plant and equipment – net of accumulated depreciation of $595.7 and $545.7 at September 30, 2024 and December 31, 2023, respectively	468.6	430.3
Goodwill	3,316	2,838.3
Intangible assets – net	1,349.4	1,011.8
Other noncurrent assets	155.7	138.5
Total assets	6,967.5	5,865.2
Current liabilities
Trade accounts payable	210.4	179.7
Accrued expenses	301.2	271.5
Current portion of long-term borrowings	0.6	0.6
Dividends payable	52.4	48.5
Total current liabilities	564.6	500.3
Long-term borrowings – net	2,075.1	1,325.1
Deferred income taxes	301.3	291.9
Other noncurrent liabilities	208.2	206.7
Total liabilities	3,149.2	2,324
Commitments and contingencies (Note 14)
Preferred stock:
Authorized: 5.0 million shares, $.01 per share par value; Issued: None	0	0
Common stock:
Authorized: 150.0 million shares, $.01 per share par value Issued: 90.1 million shares at both September 30, 2024 and December 31, 2023	0.9	0.9
Treasury stock at cost: 14.2 million shares at September 30, 2024 and 14.3 million shares at December 31, 2023	(1,176.5)	(1,187)
Additional paid-in capital	859.9	839
Retained earnings	4,159.3	3,934.3
Accumulated other comprehensive loss	(24.7)	(45.8)
Total shareholders’ equity	3,818.9	3,541.4
Noncontrolling interest	(0.6)	(0.2)
Total equity	3,818.3	3,541.2
Total liabilities and equity	$ 6,967.5	$ 5,865.2

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Accumulated depreciation	$ 595.7	$ 545.7
Preferred stock, authorized (in shares)	5,000,000	5,000,000
Preferred stock , par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, issued (in shares)	0	0
Common stock, authorized (in shares)	150,000,000	150,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued (in shares)	90,100,000	90,100,000
Treasury stock (in shares)	14,200,000	14,300,000

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Millions, $ in Millions	Total	Total Shareholders’ Equity	Common Stock Shares	Common Stock and Additional Paid-In Capital	Treasury Stock	Accumulated Other Comprehensive Loss	Retained Earnings	Noncontrolling Interest
Beginning balance (in shares) at Dec. 31, 2022			90.1
Beginning balance at Dec. 31, 2022	$ 3,039.6	$ 3,039.3		$ 818.1	$ (1,184.3)	$ (126.2)	$ 3,531.7	$ 0.3
Beginning balance (in shares) at Dec. 31, 2022					14.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	487.3	487.5					487.5	(0.2)
Other comprehensive income (loss), net of tax	(20)	(20)				(20)
Net issuance of shares of common stock (net of tax) (in shares)					(0.2)
Net issuance of shares of common stock (net of tax)	7.7	7.7			$ 7.7
Repurchases of common stock	(1.1)	(1.1)			(1.1)
Share-based compensation	18.9	18.9		18.9
Cash dividends declared	(145.2)	(145.2)					(145.2)
Ending balance (in shares) at Sep. 30, 2023			90.1
Ending balance at Sep. 30, 2023	3,387.2	3,387.1		837	$ (1,177.7)	(146.2)	3,874	0.1
Ending balance (in shares) at Sep. 30, 2023					14.3
Beginning balance (in shares) at Jun. 30, 2023			90.1
Beginning balance at Jun. 30, 2023	3,278.9	3,278.7		835.1	$ (1,182)	(87.8)	3,713.4	0.2
Beginning balance (in shares) at Jun. 30, 2023					14.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	209	209.1					209.1	(0.1)
Other comprehensive income (loss), net of tax	(58.4)	(58.4)				(58.4)
Net issuance of shares of common stock (net of tax) (in shares)					(0.1)
Net issuance of shares of common stock (net of tax)	4.3	4.3			$ 4.3
Share-based compensation	1.9	1.9		1.9
Cash dividends declared	(48.5)	(48.5)					(48.5)
Ending balance (in shares) at Sep. 30, 2023			90.1
Ending balance at Sep. 30, 2023	3,387.2	3,387.1		837	$ (1,177.7)	(146.2)	3,874	0.1
Ending balance (in shares) at Sep. 30, 2023					14.3
Beginning balance (in shares) at Dec. 31, 2023			90.1
Beginning balance at Dec. 31, 2023	$ 3,541.2	3,541.4		839.9	$ (1,187)	(45.8)	3,934.3	(0.2)
Beginning balance (in shares) at Dec. 31, 2023	14.3				14.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 381.4	381.8					381.8	(0.4)
Other comprehensive income (loss), net of tax	21.1	21.1				21.1
Net issuance of shares of common stock (net of tax) (in shares)					(0.1)
Net issuance of shares of common stock (net of tax)	10.5	10.5			$ 10.5
Share-based compensation	20.9	20.9		20.9
Cash dividends declared	(156.8)	(156.8)					(156.8)
Ending balance (in shares) at Sep. 30, 2024			90.1
Ending balance at Sep. 30, 2024	$ 3,818.3	3,818.9		860.8	$ (1,176.5)	(24.7)	4,159.3	(0.6)
Ending balance (in shares) at Sep. 30, 2024	14.2				14.2
Beginning balance (in shares) at Jun. 30, 2024			90.1
Beginning balance at Jun. 30, 2024	$ 3,653.4	3,653.8		856.8	$ (1,179.1)	(116.4)	4,092.5	(0.4)
Beginning balance (in shares) at Jun. 30, 2024					14.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	118.9	119.1					119.1	(0.2)
Other comprehensive income (loss), net of tax	91.7	91.7				91.7
Net issuance of shares of common stock (net of tax)	2.6	2.6			$ 2.6
Share-based compensation	4	4		4
Cash dividends declared	(52.3)	(52.3)					(52.3)
Ending balance (in shares) at Sep. 30, 2024			90.1
Ending balance at Sep. 30, 2024	$ 3,818.3	$ 3,818.9		$ 860.8	$ (1,176.5)	$ (24.7)	$ 4,159.3	$ (0.6)
Ending balance (in shares) at Sep. 30, 2024	14.2				14.2

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Stockholders' Equity [Abstract]
Net issuance of shares of common stock, tax amount	$ 0.2	$ 0.4	$ 2.6	$ 2.5
Cash dividends declared, per common share outstanding (in dollars per share)	$ 0.69	$ 0.64	$ 2.07	$ 1.92

CONDENSED CONSOLIDATED STATEM_6

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities
Net income		$ 381.4	$ 487.3
Adjustments to reconcile net income to net cash flows provided by operating activities:
Gain on sale of business		(4)	(93.8)
Credit loss on note receivable from collaborative partner		0	7.7
Depreciation		49.9	41.9
Amortization of intangible assets		75	70.6
Share-based compensation expense		20.9	18.9
Deferred income taxes		0.4	(1.8)
Changes in (net of the effect from acquisitions/divestitures and foreign currency translation):
Receivables – net		(14.5)	11.6
Inventories – net		(21.6)	24.5
Other current assets		(4.6)	0.3
Trade accounts payable		15.3	(30.2)
Deferred revenue		(4.3)	5.6
Accrued expenses		(0.5)	(34)
Other – net		2.1	7.1
Net cash flows provided by operating activities		495.5	515.7
Cash flows from investing activities
Capital expenditures		(49.6)	(68.3)
Acquisition of businesses, net of cash acquired		(984.5)	(110.3)
Proceeds from sale of business, net of cash remitted		45.1	110.3
Purchases of marketable securities		0	(24.6)
Proceeds from sale of marketable securities		4.5	0
Other – net		(7.3)	2.9
Net cash flows used in investing activities		(991.8)	(90)
Cash flows from financing activities
Borrowings under revolving credit facilities		279.3	0
Proceeds from issuance of long-term borrowings		496.7	100
Payment of long-term borrowings		(25)	(250)
Debt issuance costs		(1.2)	0
Cash dividends paid to shareholders		(153)	(142.3)
Proceeds from share issuances, net of shares withheld for taxes		10.5	7.7
Repurchases of common stock		0	(1.1)
Other – net		(0.6)	(1)
Net cash flows provided by (used in) financing activities		606.7	(286.7)
Effect of exchange rate changes on cash and cash equivalents		6.6	(6.5)
Net increase in cash and cash equivalents and restricted cash		117	132.5
Cash and cash equivalents at beginning of year	[1]	534.3	430.2
Cash and cash equivalents and restricted cash at end of period	[1]	651.3	562.7
Cash paid for:
Interest		25.5	30.5
Income taxes – net		$ 120.2	$ 147.1
[1] Includes $18.1 million of restricted cash at September 30, 2024. The restricted cash has been included in Other current assets in the Condensed Consolidated Balance Sheets. There was no restricted cash as of September 30, 2023, December 31, 2023 or December 31, 2022.

CONDENSED CONSOLIDATED STATEM_7

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($)	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Statement of Cash Flows [Abstract]
Restricted cash	$ 18,100,000	$ 0	$ 0	$ 0

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	9 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies	Basis of Presentation and Significant Accounting Policies The Condensed Consolidated Financial Statements of IDEX Corporation (“IDEX” or the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) applicable to interim financial information and the instructions to Form 10-Q under the Securities Exchange Act of 1934, as amended. The statements are unaudited but include all adjustments, consisting only of recurring items, except as noted, that the Company considers necessary for a fair presentation of the information set forth herein. The results of operations for the three and nine months ended September 30, 2024 are not necessarily indicative of the results to be expected for the entire year. The Condensed Consolidated Financial Statements set forth in this report should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2023. Recently Issued Accounting Standards In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which improves the disclosures required for reportable segments in the Company’s annual and interim financial statements, primarily through enhanced disclosures about significant segment expenses. ASU 2023-07 is effective for annual periods beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. Adoption of this ASU should be applied retrospectively to all prior periods presented in the financial statements. Early adoption is permitted. Adoption of the standard is not expected to have a material impact on the Company’s Consolidated Financial Statements, but will require additional segment expense disclosures when adopted in the Company’s Form 10-K for the year ending December 31, 2024 and in periodic reports thereafter. In December 2023, the FASB issued ASU 2023-09, Improvements to Income Tax Disclosures, which requires public entities, on an annual basis, to disclose standard categories in tax rate reconciliation, additional information for reconciling items that meet a quantitative threshold and income taxes paid disaggregated by jurisdiction. ASU 2023-09 is effective for annual periods beginning after December 15, 2024. Adoption of this ASU should be applied prospectively, but may be applied retrospectively to all prior periods presented in the financial statements. Early adoption is permitted. The Company is currently evaluating the impact of the adoption of this standard on the Company’s financial statement disclosures.

Acquisitions and Divestitures

Acquisitions and Divestitures	9 Months Ended
	Sep. 30, 2024
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]
Acquisitions and Divestitures	Acquisitions and Divestitures All of the Company’s acquisitions of businesses have been accounted for under Accounting Standards Codification (“ASC”) 805, Business Combinations . Accordingly, the assets and liabilities of the acquired companies, after adjustments to reflect the fair values assigned to the assets and liabilities, have been included in the Condensed Consolidated Balance Sheets from their respective dates of acquisition. The results of operations of businesses acquired have been included in the Condensed Consolidated Statements of Income since their respective dates of acquisition. Supplemental pro forma information has not been provided as the acquisitions did not have a material impact on the Condensed Consolidated Financial Statements individually or in the aggregate. The Company makes a preliminary allocation of the purchase price for each acquisition as of the acquisition date based on its understanding of the fair value of the acquired assets and assumed liabilities. These nonrecurring fair value measurements are classified as Level 3 in the fair value hierarchy. As the Company continues to obtain additional information, primarily related to the valuations of these assets and liabilities, and continues to integrate the newly acquired business, the Company will refine the estimates of fair value and more accurately allocate the purchase price through the completion of the measurement period, which is not to exceed one year from the date of acquisition. Only items that existed as of the acquisition date are considered for subsequent adjustment to the purchase price allocation. 2024 Acquisitions Mott Corporation On September 5, 2024, the Company acquired Mott Corporation and its subsidiaries (“Mott”) in a stock acquisition. Mott is a leading microfiltration business specializing in the design, customization and manufacturing of sintered porous metal components and engineered solutions used in fluidic applications. Headquartered in Farmington, Connecticut, Mott operates in the Scientific Fluidics & Optics reporting unit within the Company’s Health & Science Technologies segment. Mott was acquired for cash consideration of $986.2 million, net of cash acquired of $3.1 million. The purchase price was funded using a combination of cash on hand of $211.9 million, borrowings under the Company’s Revolving Facility of $279.3 million and net proceeds of $495.0 million from the issuance of the Company’s 4.950% Senior Notes (defined in Note 8 , “Borrowings”). Goodwill and intangible assets recognized as part of this transaction were $480.3 million and $415.8 million, respectively. The goodwill is primarily deductible for tax purposes. The goodwill recorded for the acquisition reflects the strategic fit, revenue and earnings growth potential of the acquired business and its synergies with existing IDEX businesses. As of September 30, 2024, the preliminary allocation of the purchase price to the assets acquired and liabilities assumed, based on their estimated fair values at the acquisition date, is as follows: Total Current assets, net of cash acquired $ 97.0 Property, plant and equipment 46.0 Goodwill 480.3 Intangible assets 415.8 Other noncurrent assets 12.6 Total assets acquired 1,051.7 Current liabilities (40.7) Deferred income taxes (13.0) Other noncurrent liabilities (11.8) Net assets acquired $ 986.2 Acquired intangible assets consist of trade names, customer relationships and unpatented technology. The acquired intangible assets and weighted average amortization periods are as follows: Total Weighted Average Life Trade names $ 42.0 15 Customer relationships 272.0 14 Unpatented technology 101.8 13 Acquired intangible assets $ 415.8 2023 Acquisitions Iridian On May 19, 2023, the Company acquired Iridian Spectral Technologies (“Iridian”) in a stock acquisition. Iridian is a global leader in designing and manufacturing thin-film, multi-layer optical filters serving the laser communications, telecommunications and life sciences markets and expands the Company’s array of optical technology offerings. Headquartered in Ottawa, Canada, Iridian operates in the Company’s Scientific Fluidics & Optics reporting unit within the Health & Science Technologies segment. Iridian was acquired for cash consideration of $109.8 million. The entire purchase price was funded with cash on hand. Goodwill and intangible assets recognized as part of this transaction were $54.2 million and $44.1 million, respectively. The goodwill is not deductible for tax purposes. The goodwill recorded for the acquisition reflects the strategic fit, revenue and earnings growth potential of the acquired business and its synergies with existing IDEX businesses. The final allocation of the purchase price to the assets acquired and liabilities assumed, based on their estimated fair values at the acquisition date, is as follows: Total Current assets, net of cash acquired $ 10.6 Property, plant and equipment 19.4 Goodwill 54.2 Intangible assets 44.1 Other noncurrent assets 5.4 Total assets acquired 133.7 Current liabilities (1.2) Deferred income taxes (17.8) Other noncurrent liabilities (4.9) Net assets acquired $ 109.8 Acquired intangible assets consist of trade names, customer relationships and unpatented technology. The acquired intangible assets and weighted average amortization periods are as follows: Total Weighted Average Life Trade names $ 5.2 15 Customer relationships 27.8 12 Unpatented technology 11.1 11 Acquired intangible assets $ 44.1 STC On December 14, 2023, the Company acquired STC Material Solutions (“STC”) in a stock acquisition. STC specializes in the design and manufacturing of technical ceramics and hermetic sealing products for critical applications in the semiconductor, aerospace and defense, industrial technology, medical technology and energy markets. Headquartered in St. Albans, Vermont, with additional operations in Santa Ana, California, STC operates in the Company’s Scientific Fluidics & Optics reporting unit within the Health & Science Technologies segment. STC was acquired for cash consideration of $200.4 million. The entire purchase price was funded with cash on hand. Goodwill and intangible assets recognized as part of this transaction were $104.7 million and $92.3 million, respectively. The goodwill is not deductible for tax purposes. The goodwill recorded for the acquisition reflects the strategic fit, revenue and earnings growth potential of the acquired business and its synergies with existing IDEX businesses. As of September 30, 2024, the preliminary allocation of the purchase price to the assets acquired and liabilities assumed, based on their estimated fair values at the acquisition date, is as follows: Total Current assets, net of cash acquired $ 16.9 Property, plant and equipment 12.2 Goodwill 104.7 Intangible assets 92.3 Other noncurrent assets 2.9 Total assets acquired 229.0 Current liabilities (5.5) Deferred income taxes (20.4) Other noncurrent liabilities (2.7) Net assets acquired (1) $ 200.4 (1) The Company finalized the purchase price of STC, resulting in a $1.6 million downward adjustment to the purchase price. Funds were received by the Company in April 2024. Acquired intangible assets consist of trade names, customer relationships and unpatented technology. The acquired intangible assets and weighted average amortization periods are as follows: Total Weighted Average Life Trade names $ 9.3 15 Customer relationships 63.0 15 Unpatented technology 20.0 11 Acquired intangible assets $ 92.3 Acquisition-Related Costs The Company incurred acquisition-related costs of $5.5 million and $9.3 million during the three and nine months ended September 30, 2024, respectively, and $1.8 million and $5.4 million during the three and nine months ended September 30, 2023, respectively. These costs were recorded in Selling, general and administrative expenses and were related to completed, pending and potential transactions, including transactions that ultimately were not completed. The Company also recorded fair value inventory step-up charges associated with completed acquisitions of $2.1 million and $4.6 million during the three and nine months ended September 30, 2024, respectively, and $1.2 million during the three and nine months ended September 30, 2023 in Cost of sales in the Condensed Consolidated Statements of Income. Divestitures The Company periodically reviews its businesses relative to its core business. As such, from time to time, the Company may sell various businesses or assets for a variety of reasons. Any resulting gain or loss recognized due to divestitures is recorded within Gain on sale of business in the Condensed Consolidated Statements of Income. On June 3, 2024, the Company completed the sale of Alfa Valvole, Srl (“Alfa Valvole”) for proceeds of $45.1 million, net of cash remitted, resulting in an initial gain on the sale of $4.6 million, net of a release of cumulative foreign currency translation losses of $5.5 million. During the three months ended September 30, 2024, the gain on the sale of Alfa Valvole was finalized, resulting in a downward adjustment to the gain on sale of $0.6 million for a final gain on sale of $4.0 million. There was no income tax impact associated with this transaction in the Condensed Consolidated Statements of Income due to the participation exemption of its consolidated group. The results of Alfa Valvole were reported in the Valves reporting unit within the Fluid & Metering Technologies segment through the date of disposition.

Business Segments

Business Segments	9 Months Ended
	Sep. 30, 2024
Segment Reporting [Abstract]
Business Segments	Business Segments IDEX has three reportable business segments: Fluid & Metering Technologies (“FMT”), Health & Science Technologies (“HST”) and Fire & Safety/Diversified Products (“FSDP”). Information on the Company’s business segments is presented below. The Company uses Adjusted EBITDA as its measure of segment performance. Intersegment sales are contracted with terms equivalent to those of an arm’s-length transaction. Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 NET SALES Fluid & Metering Technologies External customers $ 300.6 $ 300.5 $ 933.0 $ 945.7 Intersegment sales 0.2 0.6 0.9 2.3 Total segment sales 300.8 301.1 933.9 948.0 Health & Science Technologies External customers 309.9 312.7 922.3 1,001.4 Intersegment sales 1.1 0.5 2.6 2.3 Total segment sales 311.0 313.2 924.9 1,003.7 Fire & Safety/Diversified Products External customers 187.7 180.2 550.6 537.9 Intersegment sales 0.3 0.4 0.8 1.9 Total segment sales 188.0 180.6 551.4 539.8 Intersegment eliminations (1.6) (1.5) (4.3) (6.5) Net sales $ 798.2 $ 793.4 $ 2,405.9 $ 2,485.0 ADJUSTED EBITDA Fluid & Metering Technologies $ 98.5 $ 103.6 $ 311.6 $ 323.9 Health & Science Technologies 82.6 84.4 248.2 278.8 Fire & Safety/Diversified Products 54.7 52.8 159.9 157.0 Segment Adjusted EBITDA 235.8 240.8 719.7 759.7 Corporate and other (1) (21.5) (15.3) (72.9) (63.7) Interest expense – net (10.3) (13.7) (27.8) (40.1) Depreciation (2) (17.4) (14.7) (49.9) (41.9) Amortization of intangible assets (2) (26.5) (23.8) (75.0) (70.6) Fair value inventory step-up charges (2.1) (1.2) (4.6) (1.2) Restructuring expenses and asset impairments (3.0) (4.1) (5.4) (8.2) Gain on sale of business (3) (0.6) 93.8 4.0 93.8 Credit loss on note receivable from collaborative partner (4) — — — (7.7) Income before income taxes $ 154.4 $ 261.8 $ 488.1 $ 620.1 (1) Corporate expenses that can be identified with a segment have been included in determining segment results. The remainder are included in Corporate and other. (2) Depreciation and amortization of intangible assets by segment for the three and nine months ended September 30, 2024 and 2023 was: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Fluid & Metering Technologies Depreciation $ 4.3 $ 3.1 $ 12.9 $ 10.3 Amortization of intangible assets 5.2 5.6 15.7 17.3 Health & Science Technologies Depreciation 10.6 9.0 29.5 24.1 Amortization of intangible assets 19.7 16.7 54.6 48.5 Fire & Safety/Diversified Products Depreciation 2.2 2.3 6.7 6.7 Amortization of intangible assets 1.6 1.5 4.7 4.8 Corporate and other Depreciation 0.3 0.3 0.8 0.8 Total $ 43.9 $ 38.5 $ 124.9 $ 112.5 (3) Activity recorded during the three months ended September 30, 2024 represents the finalization of the gain on the sale of Alfa Valvole resulting in a $0.6 million downward adjustment during the third quarter of 2024. (4) Represents a reserve on an investment with a collaborative partner recorded in Other expense (income) – net during the nine months ended September 30, 2023. During the fourth quarter of 2023, the Company converted the promissory note receivable from the collaborative partner to equity, resulting in a cost method investment with zero value. September 30, 2024 December 31, 2023 ASSETS Fluid & Metering Technologies $ 1,668.7 $ 1,674.7 Health & Science Technologies 4,286.6 3,262.4 Fire & Safety/Diversified Products 818.5 792.6 Corporate and other 193.7 135.5 Total assets $ 6,967.5 $ 5,865.2

Revenue

Revenue	9 Months Ended
	Sep. 30, 2024
Revenue from Contract with Customer [Abstract]
Revenue	Revenue Disaggregation of Revenue The Company has a comprehensive offering of products, including technologies, built to customers’ specifications that are sold in niche markets throughout the world. The Company disaggregates revenue from contracts with customers by reporting unit and geographical region for each segment as the Company believes it best depicts how the amount, nature, timing and uncertainty of its revenue and cash flows are affected by economic factors. Revenue, presented as Net sales on the Condensed Consolidated Statements of Income, was attributed to geographical region based on the location of the customer. The following tables present revenue disaggregated by reporting unit and geographical region. Revenue by reporting unit for the three and nine months ended September 30, 2024 and 2023 was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Pumps $ 102.5 $ 94.7 $ 305.8 $ 309.0 Water 87.3 79.8 259.2 261.2 Energy 48.7 53.7 159.0 160.1 Agriculture 33.0 39.2 111.3 117.9 Valves 29.3 33.7 98.6 99.8 Intersegment elimination (0.2) (0.6) (0.9) (2.3) Fluid & Metering Technologies 300.6 300.5 933.0 945.7 Scientific Fluidics & Optics 167.6 162.1 487.9 509.7 Sealing Solutions 57.0 59.2 177.3 186.3 Performance Pneumatic Technologies 58.7 60.0 175.5 195.4 Material Processing Technologies 27.7 29.7 84.2 90.4 Micropump (1) — 2.2 — 21.9 Intersegment elimination (1.1) (0.5) (2.6) (2.3) Health & Science Technologies 309.9 312.7 922.3 1,001.4 Fire & Safety 123.2 112.0 340.0 328.0 Dispensing 35.4 41.9 122.0 122.8 BAND-IT 29.4 26.7 89.4 89.0 Intersegment elimination (0.3) (0.4) (0.8) (1.9) Fire & Safety/Diversified Products 187.7 180.2 550.6 537.9 Net sales $ 798.2 $ 793.4 $ 2,405.9 $ 2,485.0 (1) Revenue from Micropump (sold on August 3, 2023) has been included in the Condensed Consolidated Statements of Income through the date of disposition. Revenue by geographical region for the three and nine months ended September 30, 2024 and 2023 was as follows: Three Months Ended September 30, 2024 FMT HST FSDP IDEX U.S. $ 168.5 $ 139.9 $ 88.9 $ 397.3 North America, excluding U.S. 17.2 6.0 10.0 33.2 Europe 45.7 100.4 44.4 190.5 Asia 43.6 59.4 35.1 138.1 Other (1) 25.8 5.3 9.6 40.7 Intersegment elimination (0.2) (1.1) (0.3) (1.6) Net sales $ 300.6 $ 309.9 $ 187.7 $ 798.2 Three Months Ended September 30, 2023 FMT HST FSDP IDEX U.S. $ 168.4 $ 139.2 $ 94.4 $ 402.0 North America, excluding U.S. 15.5 3.2 8.8 27.5 Europe 52.3 106.0 39.0 197.3 Asia 43.1 57.8 29.0 129.9 Other (1) 21.8 7.0 9.4 38.2 Intersegment elimination (0.6) (0.5) (0.4) (1.5) Net sales $ 300.5 $ 312.7 $ 180.2 $ 793.4 Nine Months Ended September 30, 2024 FMT HST FSDP IDEX U.S. $ 522.3 $ 420.6 $ 259.5 $ 1,202.4 North America, excluding U.S. 50.8 16.3 26.3 93.4 Europe 159.8 303.0 135.7 598.5 Asia 129.8 168.9 102.3 401.0 Other (1) 71.2 16.1 27.6 114.9 Intersegment elimination (0.9) (2.6) (0.8) (4.3) Net sales $ 933.0 $ 922.3 $ 550.6 $ 2,405.9 Nine Months Ended September 30, 2023 FMT HST FSDP IDEX U.S. $ 525.9 $ 437.3 $ 280.5 $ 1,243.7 North America, excluding U.S. 52.8 16.6 25.4 94.8 Europe 163.0 338.1 126.1 627.2 Asia 137.0 189.6 80.4 407.0 Other (1) 69.3 22.1 27.4 118.8 Intersegment elimination (2.3) (2.3) (1.9) (6.5) Net sales $ 945.7 $ 1,001.4 $ 537.9 $ 2,485.0 (1) Other includes: South America, Middle East, Australia and Africa. Performance Obligations The Company’s performance obligations are satisfied either at a point in time or over time as work progresses. Revenue from products and services transferred to customers at a point in time comprised approximately 95% of the Company’s revenue and over time comprised approximately 5% of the Company’s revenue in all periods presented. Contract Assets and Liabilities The timing of billings and cash collections can result in customer receivables, billings in excess of revenue recognized, advance payments or deposits. Customer receivables include both amounts billed and currently due from customers as well as unbilled amounts (contract assets) and are included in Receivables – net on the Condensed Consolidated Balance Sheets. The composition of customer receivables was as follows: September 30, 2024 December 31, 2023 Billed receivables $ 451.4 $ 408.1 Unbilled receivables 15.9 10.9 Total customer receivables $ 467.3 $ 419.0 Billings in excess of revenue recognized, advance payments and deposits represent contract liabilities and are included in deferred revenue which is classified as current or noncurrent based on when the Company expects to recognize the revenue. The current portion is included in Accrued expenses and the noncurrent portion is included in Other noncurrent liabilities on the Condensed Consolidated Balance Sheets. The composition of deferred revenue was as follows: September 30, 2024 December 31, 2023 Deferred revenue – current $ 65.0 $ 55.9 Deferred revenue – noncurrent 16.3 17.3 Total deferred revenue $ 81.3 $ 73.2

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2024
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Common Share Diluted earnings per common share (“EPS”) attributable to IDEX is computed by dividing Net income attributable to IDEX by the weighted average number of common shares outstanding (basic) plus common stock equivalents outstanding (diluted) for the period. Common stock equivalents consist of restricted stock, performance share units and stock options, which have been included in the calculation of weighted average common shares outstanding using the treasury stock method. ASC 260, Earnings Per Share (“ASC 260”) , concludes that all outstanding unvested share-based payment awards that contain rights to non-forfeitable dividends participate in undistributed earnings with common shareholders. If awards are considered participating securities, the Company is required to apply the two-class method of computing basic and diluted earnings per share. The Company has determined that its outstanding shares of restricted stock granted prior to the adoption of the 2024 Incentive Award Plan are participating securities. Accordingly, Diluted EPS attributable to IDEX was computed using the two-class method prescribed by ASC 260. Under the 2024 Incentive Award Plan, dividend rights for restricted stock are subject to the same vesting requirements as the underlying restricted stock awards. Consequently, any restricted stock awarded under the 2024 Incentive Plan will not be considered participating securities. Basic weighted average common shares outstanding reconciles to diluted weighted average common shares outstanding as follows: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Basic weighted average common shares outstanding 75.7 75.6 75.7 75.6 Dilutive effect of restricted stock, performance share units and stock options 0.2 0.3 0.2 0.3 Diluted weighted average common shares outstanding 75.9 75.9 75.9 75.9 Share-based payment awards of approximately 0.5 million shares of common stock for both the three and nine months ended September 30, 2024 and 0.2 million shares of common stock for both the three and nine months ended September 30, 2023 were not included in the computation of Diluted EPS attributable to IDEX because the effect of their inclusion would have been antidilutive.

Balance Sheet Components

Balance Sheet Components	9 Months Ended
	Sep. 30, 2024
Additional Financial Information Disclosure [Abstract]
Balance Sheet Components	Balance Sheet Components September 30, 2024 December 31, 2023 RECEIVABLES – NET Customers $ 467.3 $ 419.0 Other 16.0 16.3 Total 483.3 435.3 Less: allowance for credit losses 8.2 7.5 Receivables – net $ 475.1 $ 427.8 INVENTORIES – NET Raw materials and component parts $ 314.9 $ 268.1 Work in process 43.8 44.5 Finished goods 129.5 108.2 Inventories – net $ 488.2 $ 420.8 ACCRUED EXPENSES Payroll and related items $ 101.0 $ 97.1 Management incentive compensation 13.0 16.4 Income taxes payable 18.2 18.5 Deferred revenue 65.0 55.9 Lease liability 26.6 22.0 Other 77.4 61.6 Accrued expenses $ 301.2 $ 271.5

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets The changes in the carrying amount of goodwill for the nine months ended September 30, 2024, by reportable business segment, were as follows: FMT HST FSDP IDEX Goodwill $ 805.7 $ 1,834.5 $ 398.7 $ 3,038.9 Accumulated goodwill impairment losses (20.7) (149.8) (30.1) (200.6) Balance at January 1, 2024 785.0 1,684.7 368.6 2,838.3 Foreign currency translation 0.3 5.2 1.3 6.8 Acquisitions — 480.3 — 480.3 Measurement period adjustments — 2.2 — 2.2 Divestitures (11.6) — — (11.6) Balance at September 30, 2024 $ 773.7 $ 2,172.4 $ 369.9 $ 3,316.0 ASC 350, Goodwill and Other Intangible Assets (“ASC 350”) , requires that goodwill be tested for impairment at the reporting unit level on an annual basis and between annual tests if an event occurs or circumstances change that would more likely than not reduce the fair value of the reporting unit below its carrying value. Annually, on October 31, goodwill and other acquired intangible assets with indefinite lives are tested for impairment. Based on the results of the Company’s annual impairment test at October 31, 2023, all reporting units had fair values in excess of their carrying values. During the nine months ended September 30, 2024, there were no events or circumstances that would have required an interim impairment test. The following table provides the gross carrying value and accumulated amortization for each major class of intangible asset at September 30, 2024 and December 31, 2023: September 30, 2024 December 31, 2023 Gross Accumulated Net Gross Accumulated Net Amortized intangible assets: Patents $ 2.7 $ (2.1) $ 0.6 $ 2.7 $ (2.0) $ 0.7 Trade names 207.0 (58.2) 148.8 171.9 (54.3) 117.6 Customer relationships 1,109.0 (266.3) 842.7 860.7 (228.7) 632.0 Unpatented technology 336.2 (82.3) 253.9 233.5 (66.3) 167.2 Software 15.6 (3.1) 12.5 5.3 (1.9) 3.4 Total amortized intangible assets 1,670.5 (412.0) 1,258.5 1,274.1 (353.2) 920.9 Indefinite-lived intangible assets: Banjo trade name 62.1 — 62.1 62.1 — 62.1 Akron Brass trade name 28.8 — 28.8 28.8 — 28.8 Total intangible assets $ 1,761.4 $ (412.0) $ 1,349.4 $ 1,365.0 $ (353.2) $ 1,011.8 The Banjo and Akron Brass trade names are indefinite-lived intangible assets which are tested for impairment on an annual basis in accordance with ASC 350 or more frequently if events or changes in circumstances indicate that the assets might be impaired. Based on the results of the Company’s annual impairment test at October 31, 2023, these indefinite-lived intangible assets had fair values in excess of their carrying values. During the nine months ended September 30, 2024, there were no events or circumstances that would have required an interim impairment test on these indefinite-lived intangible assets. Amortization of intangible assets was $26.5 million and $75.0 million for the three and nine months ended September 30, 2024 , respectively. Amortization of intangible assets wa s $23.8 million and $70.6 million for the three and nine months ended September 30, 2023 , respectively. Based on the intangible asset balances as of September 30, 2024 , expected amortization expense for the remaining three months of 2024 and for the years 2025 through 2028 is as follows: Estimated Amortization Remainder of 2024 $ 32.6 2025 128.1 2026 126.4 2027 122.7 2028 119.5

Borrowings

Borrowings	9 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
Borrowings	Borrowings Borrowings at September 30, 2024 and December 31, 2023 consisted of the following: September 30, 2024 December 31, 2023 3.37% Senior Notes, due June 2025 (the “3.37% Senior Notes”) (1) $ 100.0 $ 100.0 5.13% Senior Notes, due June 2028 (the “5.13% Senior Notes”) 100.0 100.0 4.950% Senior Notes, due September 2029 (the “4.950% Senior Notes”) 500.0 — 3.00% Senior Notes, due May 2030 (the “3.00% Senior Notes”) 500.0 500.0 2.625% Senior Notes, due June 2031 (the “2.625% Senior Notes”) 500.0 500.0 $800.0 million Revolving Facility, due November 2027 (the “Revolving Facility”) (2) 360.6 81.0 $200.0 million Term Facility, due November 2027 (the “Term Facility”) (3) 25.0 50.0 Other borrowings 1.8 2.3 Total borrowings 2,087.4 1,333.3 Less: current portion 0.6 0.6 Less: unamortized debt issuance costs and discount on debt 11.7 7.6 Long-term borrowings $ 2,075.1 $ 1,325.1 (1) As of September 30, 2024, the $100.0 million 3.37% Senior Notes, due in June 2025, have been classified as Long-term borrowings on the Condensed Consolidated Balance Sheets. The Company has the ability and intent to either refinance or repay these Notes using the available borrowing capacity of the Revolving Facility, due November 2027. (2) During the third quarter of 2024, the Company drew down an aggregate amount of $279.3 million under the Revolving Facility to finance a portion of Company’s acquisition of Mott. At September 30, 2024, there was $360.6 million outstanding under the Revolving Facility and $2.7 million of outstanding letters of credit, resulting in a net available borrowing capacity under the Revolving Facility of approximately $436.7 million. The weighted-average interest rate for borrowings outstanding under the Revolving Facility was 4.72% and 4.22% as of September 30, 2024 and December 31, 2023, respectively. During October 2024, the Company repaid $69.1 million of the $360.6 million outstanding under the Revolving Facility. (3) The weighted-average interest rate for borrowings outstanding under the Term Facility was 6.55% and 6.22% as of September 30, 2024 and December 31, 2023, respectively. During the second quarter of 2024, the Company repaid $25.0 million of the $50.0 million previously outstanding under the Term Facility. During October 2024, the Company repaid the remaining $25.0 million outstanding under the Term Facility. At September 30, 2024, the Company was in compliance with the covenants contained in the credit agreement associated with the Revolving Facility as well as other long-term debt agreements. Issuance of 4.950% Senior Notes due 2029 O n August 21, 2024, the Company completed an underwritten public offering of $500.0 million in aggregate principal amount of its 4.950% Senior Notes. The 4.950% Senior Notes bear interest at a rate of 4.950% per annum, which is payable semi-annually in arrears during the first and third quarters of the year, beginning in the first quarter of 2025. The 4.950% Senior Notes will mature on September 1, 2029. The 4.950% Senior Notes are senior, unsecured obligations of the Company and (i) rank equal in right of payment to all of the Company’s existing and future senior unsecured indebtedness, (ii) rank senior in right of payment to all of the Company’s existing and future subordinated indebtedness, and (iii) rank effectively subordinated in right of payment to the Company’s future secured indebtedness. The net proceeds from the 4.950% Senior Notes offering were approximately $495.0 million, after deducting the underwriting discount and offering expenses paid and payable by the Company. The Company used the net proceeds from the offering, together with the Revolving Facility borrowings discussed above and cash on hand, to fund the Mott acquisition and pay related fees and expenses. The Company may redeem all or a portion of the 4.950% Senior Notes at any time prior to maturity at the redemption prices set forth in the Supplemental Indenture governing the 4.950% Senior Notes (the “Indenture”). The terms of the 4.950% Senior Notes also require the Company to make an offer to repurchase all or a portion of the 4.950% Senior Notes (unless otherwise redeemed) upon a “Change of Control Triggering Event” (as defined in the Indenture) at a price equal to 101% of their principal amount plus accrued and unpaid interest, if any, to, but excluding, the repurchase date. The 4.950% Senior Notes are not subject to any financial covenants under the Indenture; however, they are subject to cross-acceleration provisions.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements ASC 820, Fair Value Measurements and Disclosures, defines fair value, provides guidance for measuring fair value and requires certain disclosures. This standard discusses valuation techniques, such as the market approach (comparable market prices), the income approach (present value of future income or cash flow) and the cost approach (cost to replace the service capacity of an asset or replacement cost). The standard utilizes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. The following is a brief description of those three levels: • Level 1: Observable inputs such as quoted prices (unadjusted) in active markets for identical assets or liabilities. • Level 2: Inputs, other than quoted prices that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. • Level 3: Unobservable inputs that reflect the reporting entity’s own assumptions. The following table summarizes the basis used to measure the Company’s financial assets (liabilities) at fair value on a recurring basis in the balance sheets at September 30, 2024 and December 31, 2023: Basis of Fair Value Measurements September 30, 2024 December 31, 2023 Level 1 Level 1 Trading securities - mutual funds held in nonqualified SERP (1) $ 10.4 $ 10.5 Available-for-sale securities - equities (2) — 4.4 (1) The Supplemental Executive Retirement Plan (“SERP”) investment assets are offset by a SERP liability which represents the Company’s obligation to distribute SERP funds to participants. The SERP investment assets and liability are included in Other noncurrent assets and Other noncurrent liabilities, respectively, on the Condensed Consolidated Balance Sheets. (2) The securities are included in Other current assets on the Condensed Consolidated Balance Sheets and are available for overnight cash settlement, if necessary, to fund current operations. There were no transfers of assets or liabilities between Level 1 and Level 2 during the three and nine months ended September 30, 2024 or the year ended December 31, 2023. The carrying values of the Company’s cash and cash equivalents, accounts receivable, accounts payable and accrued expenses approximate fair value because of the short-term nature of these instruments. The following table provides the fair value of the outstanding indebtedness described in Note 8 , “Borrowings,” which is based on quoted market prices and current market rates for debt with similar credit risk and maturity, as well as the carrying value. These fair value measurements are classified as Level 2 within the fair value hierarchy since they are determined based upon significant inputs observable in the market, including interest rates on recent financing transactions to entities with a credit rating similar to the Company’s rating. September 30, 2024 December 31, 2023 Fair Value Carrying Amount Fair Value Carrying Amount Total Borrowings, less unaccreted debt discount $ 2,014.7 $ 2,086.1 $ 1,203.5 $ 1,332.2

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	9 Months Ended
	Sep. 30, 2024
Equity [Abstract]
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss The components of Accumulated other comprehensive loss for the three and nine months ended September 30, 2024 and 2023 are as follows: Cumulative Translation Adjustment Pension and Other Postretirement Adjustments Accumulated Other Comprehensive Loss Three Months Ended September 30, 2024 Balance, June 30, 2024 (1) $ (119.6) $ 3.2 $ (116.4) Other comprehensive income before reclassification adjustments 91.8 — 91.8 Gain reclassified from Accumulated other comprehensive loss (2)(3) — (0.2) (0.2) Tax impact — 0.1 0.1 Net other comprehensive income (loss) (1) 91.8 (0.1) 91.7 Balance, September 30, 2024 (1) $ (27.8) $ 3.1 $ (24.7) Nine Months Ended September 30, 2024 Balance, December 31, 2023 (1) $ (49.3) $ 3.5 $ (45.8) Other comprehensive income before reclassification adjustments 16.0 — 16.0 Gain reclassified from Accumulated other comprehensive loss (2)(3) — (0.6) (0.6) Loss reclassified related to divestitures (4) 5.5 — 5.5 Tax impact — 0.2 0.2 Net other comprehensive income (loss) (1) 21.5 (0.4) 21.1 Balance, September 30, 2024 (1) $ (27.8) $ 3.1 $ (24.7) Three Months Ended September 30, 2023 Balance, June 30, 2023 (1) $ (98.2) $ 10.4 $ (87.8) Other comprehensive loss before reclassification adjustments (58.1) — (58.1) Gain reclassified from Accumulated other comprehensive loss (2)(3) — (0.3) (0.3) Tax impact — — — Net other comprehensive loss (1) (58.1) (0.3) (58.4) Balance, September 30, 2023 (1) $ (156.3) $ 10.1 $ (146.2) Nine Months Ended September 30, 2023 Balance, December 31, 2022 (1) $ (137.1) $ 10.9 $ (126.2) Other comprehensive loss before reclassification adjustments (19.2) — (19.2) Gain reclassified from Accumulated other comprehensive loss (2)(3) — (1.0) (1.0) Tax impact — 0.2 0.2 Net other comprehensive loss (1) (19.2) (0.8) (20.0) Balance, September 30, 2023 (1) $ (156.3) $ 10.1 $ (146.2) (1) Amounts are presented net of tax. (2) Included in the computation of net periodic cost. See Note 13 , “Retirement Benefits.” (3) Included in Other expense (income) – net in the Condensed Consolidated Statements of Income. (4) In conjunction with the divestiture of Alfa Valvole during the second quarter of 2024, the Company released associated cumulative foreign currency translation losses and included the release as part of the gain on sale of business.

Share Repurchases

Share Repurchases	9 Months Ended
	Sep. 30, 2024
Equity [Abstract]
Share Repurchases	Share Repurchases On March 17, 2020, the Company’s Board of Directors approved an increase of $500.0 million in the authorized level of repurchases of common stock. This approval is in addition to the prior repurchase authorization of the Board of Directors of $300.0 million on December 1, 2015. These authorizations have no expiration date. There were no share repurchases during the nine months ended September 30, 2024. During the nine months ended September 30, 2023, the Company repurchased a total of 5,400 shares at a cost of $1.1 million. As of September 30, 2024, the amount of share repurchase authorization remaining was $539.7 million.

Share-Based Compensation

Share-Based Compensation	9 Months Ended
	Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]
Share-Based Compensation	Share-Based Compensation The Company typically grants equity awards annually at its regularly scheduled first quarter meeting of the Board of Directors based on the recommendation from the Compensation Committee. The Company’s policy is to recognize compensation cost on a straight-line basis, assuming forfeitures, over the requisite service period for the entire award. Classification of share-based compensation cost within the Condensed Consolidated Statements of Income is consistent with the classification of cash compensation for the same employees. Stock Options Stock options granted under the Company’s plans are generally non-qualified and are granted with an exercise price equal to the market price of the Company’s stock on the date of grant. The fair value of each option grant was estimated on the date of the grant using the Black Scholes valuation model. Stock options generally vest ratably over four years, with vesting beginning one year from the date of grant, and generally expire 10 years from the date of grant. The service period for certain retiree eligible participants is accelerated. The assumptions used in determining the fair value of the stock options granted in the respective periods were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Weighted average fair value of grants $49.83 $56.47 $63.63 $60.49 Dividend yield 1.42% 1.20% 1.09% 1.07% Volatility 26.47% 26.78% 26.66% 27.17% Risk-free interest rate 4.08% 4.26% 4.31% 4.12% Expected life (in years) 4.60 4.50 4.60 4.50 A summary of the Company’s stock option activity as of September 30, 2024 and changes during the nine months ended September 30, 2024 are presented in the following table: Stock Options Shares Weighted Weighted-Average Aggregate Outstanding at January 1, 2024 983,267 $ 178.86 6.88 $ 39.3 Granted 196,600 234.59 Exercised (79,005) 155.56 Forfeited (38,796) 205.39 Outstanding at September 30, 2024 1,062,066 $ 189.84 6.78 $ 31.9 Vested and expected to vest as of September 30, 2024 1,025,776 $ 188.79 6.71 $ 31.7 Exercisable at September 30, 2024 603,219 $ 168.07 5.47 $ 28.7 As of September 30, 2024, there was $11.0 million of total unrecognized compensation cost related to stock options that is expected to be recognized over a weighted-average period of 1.4 years. Restricted Stock Restricted stock awards generally cliff vest after three years for employees and non-employee directors. The service period for certain retiree eligible participants is accelerated. Unvested restricted stock carries dividend and voting rights and the sale of the shares is restricted prior to the date of vesting. Dividends are paid on restricted stock awards and their fair value is equal to the market price of the Company’s stock at the date of the grant. A summary of the Company’s restricted stock activity as of September 30, 2024 and changes during the nine months ended September 30, 2024 are presented in the following table: Restricted Stock Shares Weighted-Average Unvested at January 1, 2024 112,891 $ 193.03 Granted 102,915 211.55 Vested (24,125) 201.52 Forfeited (11,600) 210.94 Unvested at September 30, 2024 180,081 $ 201.32 As of September 30, 2024, there was $18.0 million of total unrecognized compensation cost related to restricted stock that is expected to be recognized over a weighted-average period of 1.2 years. Cash-Settled Restricted Stock The Company also maintains a cash-settled share-based compensation plan for certain employees. Cash-settled restricted stock awards generally cliff vest after three years. The service period for certain retiree eligible participants is accelerated. Cash-settled restricted stock awards are recorded at fair value on a quarterly basis using the market price of the Company’s stock on the last day of the quarter. At September 30, 2024 and December 31, 2023, the Company had accrued $3.7 million and $4.2 million, respectively, for cash-settled restricted stock in Accrued expenses in the Condensed Consolidated Balance Sheets and had accrued $2.5 million and $2.9 million, respectively, for cash-settled restricted stock in Other noncurrent liabilities in the Condensed Consolidated Balance Sheets. These recurring fair value measurements are classified as Level 1 in the fair value hierarchy. Dividend equivalents are paid on certain cash-settled restricted stock awards. A summary of the Company’s unvested cash-settled restricted stock activity as of September 30, 2024 and changes during the nine months ended September 30, 2024 are presented in the following table: Cash-Settled Restricted Stock Shares Weighted-Average Unvested at January 1, 2024 56,655 $ 217.11 Granted 23,555 229.87 Vested (15,275) 235.39 Forfeited (5,430) 214.50 Unvested at September 30, 2024 59,505 $ 214.50 As of September 30, 2024, there was $4.9 million of total unrecognized compensation cost related to cash-settled restricted shares that is expected to be recognized over a weighted-average period of 1.1 years. Performance Share Units The performance share units are market condition awards and have been assessed at fair value on the date of grant using a Monte Carlo simulation model. The assumptions used in determining the fair value of the performance share units granted in the respective periods were as follows: Nine Months Ended September 30, 2024 2023 Weighted average fair value of grants $349.59 $308.18 Dividend yield —% —% Volatility 22.23% 27.00% Risk-free interest rate 4.45% 4.37% Expected life (in years) 2.94 2.94 A summary of the Company’s performance share unit activity as of September 30, 2024 and changes during the nine months ended September 30, 2024 are presented in the following table: Performance Share Units Shares Weighted-Average Unvested at January 1, 2024 67,455 $ 265.15 Granted 27,135 349.59 Vested (9,606) 245.40 Forfeited (11,444) 252.92 Unvested at September 30, 2024 73,540 $ 300.35 On January 31, 2024, 19,200 performance share units vested. Based on the Company’s relative total shareholder return rank during the three-year period ended January 31, 2024, the Company achieved a 50% payout factor and issued 9,606 common shares in February 2024 for awards that vested in 2024. As of September 30, 2024, there was $3.9 million of total unrecognized compensation cost related to performance share units that is expected to be recognized over a weighted-average period of 1.0 year. Summary of Share-Based Compensation Expense Pre-tax compensation cost is recognized in both Cost of sales and Selling, general and administrative expenses in the Condensed Consolidated Statements of Income depending on the functional area of the underlying employees. Total compensation cost related to all share-based awards was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Stock options expense $ 1.5 $ 1.1 $ 8.4 $ 8.7 Restricted stock expense 1.6 1.1 5.7 4.4 Cash-settled restricted stock expense 1.2 0.6 2.8 2.3 Performance share units expense (1) 0.9 (0.3) 6.8 5.7 Total pre-tax share-based compensation expense 5.2 2.5 23.7 21.1 Income tax benefit (0.7) (0.5) (2.3) (2.1) Total share-based compensation expense, net of income taxes $ 4.5 $ 2.0 $ 21.4 $ 19.0 (1) Performance share units expense for the three and nine months ended September 30, 2023 reflects lower expense of $1.1 million of executive forfeitures, which occurred during the third quarter of 2023.

Retirement Benefits

Retirement Benefits	9 Months Ended
	Sep. 30, 2024
Retirement Benefits [Abstract]
Retirement Benefits	Retirement Benefits The Company sponsors several qualified and nonqualified defined benefit and defined contribution pension plans as well as other postretirement plans for its employees. The following tables provide the components of net periodic cost for its major defined benefit plans and its other postretirement plans. Pension Benefits Three Months Ended September 30, 2024 2023 U.S. Non-U.S. U.S. Non-U.S. Service cost $ 0.1 $ 0.3 $ 0.1 $ 0.3 Interest cost 0.1 0.6 0.1 0.6 Expected return on plan assets (0.1) (0.4) (0.1) (0.4) Net amortization — — — (0.1) Net periodic cost $ 0.1 $ 0.5 $ 0.1 $ 0.4 Pension Benefits Nine Months Ended September 30, 2024 2023 U.S. Non-U.S. U.S. Non-U.S. Service cost $ 0.1 $ 1.1 $ 0.1 $ 0.9 Interest cost 0.3 1.9 0.3 2.0 Expected return on plan assets (0.2) (1.3) (0.2) (1.2) Net amortization 0.2 (0.1) 0.1 (0.4) Net periodic cost $ 0.4 $ 1.6 $ 0.3 $ 1.3 Other Postretirement Benefits Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Service cost $ 0.2 $ 0.1 $ 0.4 $ 0.3 Interest cost 0.2 0.2 0.6 0.6 Net amortization (0.2) (0.2) (0.7) (0.7) Net periodic cost $ 0.2 $ 0.1 $ 0.3 $ 0.2 The Company recognizes the service cost component in both Cost of sales and Selling, general and administrative expenses in the Condensed Consolidated Statements of Income depending on the functional area of the underlying employees and the interest cost, expected return on plan assets and net amortization components in Other expense (income) – net in the Condensed Consolidated Statements of Income. The Company expects to contribute approximately $3.6 million to its defined benefit plans and $1.1 million to its other postretirement benefit plans in 2024. The Company contributed a total of $3.5 million and $3.9 million to fund these plans during the nine months ended September 30, 2024 and 2023, respectively.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies The Company and certain of its subsidiaries are involved in pending and threatened legal, regulatory and other proceedings arising in the ordinary course of business. These proceedings may pertain to matters such as product liability or contract disputes, and may also involve governmental inquiries, inspections, audits or investigations relating to issues such as tax matters, intellectual property, environmental, health and safety issues, governmental regulations, employment and other matters. Although the results of such legal proceedings cannot be predicted with certainty, the Company believes that the ultimate disposition of these matters will not have a material adverse effect, individually or in the aggregate, on the Company’s business, financial condition, results of operations or cash flows.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company’s provision for income taxes is based upon estimated annual tax rates for the year applied to federal income as well as state and foreign income in various jurisdictions, permanent differences between book and tax items, tax credits and the Company’s change in relative income in each jurisdiction. The provision for income taxes and the effective tax rates for the periods presented were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Income before income taxes $ 154.4 $ 261.8 $ 488.1 $ 620.1 Provision for income taxes 35.5 52.8 106.7 132.8 Effective tax rate 22.9 % 20.2 % 21.9 % 21.4 %

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ 119.1	$ 209.1	$ 381.8	$ 487.5

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Sep. 30, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Basis of Presentation and Sig_2

Basis of Presentation and Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
Basis of Presentation	The Condensed Consolidated Financial Statements of IDEX Corporation (“IDEX” or the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) applicable to interim financial information and the instructions to Form 10-Q under the Securities Exchange Act of 1934, as amended. The statements are unaudited but include all adjustments, consisting only of recurring items, except as noted, that the Company considers necessary for a fair presentation of the information set forth herein. The results of operations for the three and nine months ended September 30, 2024 are not necessarily indicative of the results to be expected for the entire year.
Recently Issued Accounting Standards	Recently Issued Accounting Standards In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which improves the disclosures required for reportable segments in the Company’s annual and interim financial statements, primarily through enhanced disclosures about significant segment expenses. ASU 2023-07 is effective for annual periods beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. Adoption of this ASU should be applied retrospectively to all prior periods presented in the financial statements. Early adoption is permitted. Adoption of the standard is not expected to have a material impact on the Company’s Consolidated Financial Statements, but will require additional segment expense disclosures when adopted in the Company’s Form 10-K for the year ending December 31, 2024 and in periodic reports thereafter. In December 2023, the FASB issued ASU 2023-09, Improvements to Income Tax Disclosures, which requires public entities, on an annual basis, to disclose standard categories in tax rate reconciliation, additional information for reconciling items that meet a quantitative threshold and income taxes paid disaggregated by jurisdiction. ASU 2023-09 is effective for annual periods beginning after December 15, 2024. Adoption of this ASU should be applied prospectively, but may be applied retrospectively to all prior periods presented in the financial statements. Early adoption is permitted. The Company is currently evaluating the impact of the adoption of this standard on the Company’s financial statement disclosures.

Acquisitions and Divestitures (

Acquisitions and Divestitures (Tables)	9 Months Ended
	Sep. 30, 2024
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	As of September 30, 2024, the preliminary allocation of the purchase price to the assets acquired and liabilities assumed, based on their estimated fair values at the acquisition date, is as follows: Total Current assets, net of cash acquired $ 97.0 Property, plant and equipment 46.0 Goodwill 480.3 Intangible assets 415.8 Other noncurrent assets 12.6 Total assets acquired 1,051.7 Current liabilities (40.7) Deferred income taxes (13.0) Other noncurrent liabilities (11.8) Net assets acquired $ 986.2 The final allocation of the purchase price to the assets acquired and liabilities assumed, based on their estimated fair values at the acquisition date, is as follows: Total Current assets, net of cash acquired $ 10.6 Property, plant and equipment 19.4 Goodwill 54.2 Intangible assets 44.1 Other noncurrent assets 5.4 Total assets acquired 133.7 Current liabilities (1.2) Deferred income taxes (17.8) Other noncurrent liabilities (4.9) Net assets acquired $ 109.8 As of September 30, 2024, the preliminary allocation of the purchase price to the assets acquired and liabilities assumed, based on their estimated fair values at the acquisition date, is as follows: Total Current assets, net of cash acquired $ 16.9 Property, plant and equipment 12.2 Goodwill 104.7 Intangible assets 92.3 Other noncurrent assets 2.9 Total assets acquired 229.0 Current liabilities (5.5) Deferred income taxes (20.4) Other noncurrent liabilities (2.7) Net assets acquired (1) $ 200.4 (1)
Schedule of Finite-Lived Intangible Assets Acquired	Acquired intangible assets consist of trade names, customer relationships and unpatented technology. The acquired intangible assets and weighted average amortization periods are as follows: Total Weighted Average Life Trade names $ 42.0 15 Customer relationships 272.0 14 Unpatented technology 101.8 13 Acquired intangible assets $ 415.8 Total Weighted Average Life Trade names $ 5.2 15 Customer relationships 27.8 12 Unpatented technology 11.1 11 Acquired intangible assets $ 44.1 Total Weighted Average Life Trade names $ 9.3 15 Customer relationships 63.0 15 Unpatented technology 20.0 11 Acquired intangible assets $ 92.3

Business Segments (Tables)

Business Segments (Tables)	9 Months Ended
	Sep. 30, 2024
Segment Reporting [Abstract]
Schedule of Information on Company's Business Segments	Information on the Company’s business segments is presented below. The Company uses Adjusted EBITDA as its measure of segment performance. Intersegment sales are contracted with terms equivalent to those of an arm’s-length transaction. Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 NET SALES Fluid & Metering Technologies External customers $ 300.6 $ 300.5 $ 933.0 $ 945.7 Intersegment sales 0.2 0.6 0.9 2.3 Total segment sales 300.8 301.1 933.9 948.0 Health & Science Technologies External customers 309.9 312.7 922.3 1,001.4 Intersegment sales 1.1 0.5 2.6 2.3 Total segment sales 311.0 313.2 924.9 1,003.7 Fire & Safety/Diversified Products External customers 187.7 180.2 550.6 537.9 Intersegment sales 0.3 0.4 0.8 1.9 Total segment sales 188.0 180.6 551.4 539.8 Intersegment eliminations (1.6) (1.5) (4.3) (6.5) Net sales $ 798.2 $ 793.4 $ 2,405.9 $ 2,485.0 ADJUSTED EBITDA Fluid & Metering Technologies $ 98.5 $ 103.6 $ 311.6 $ 323.9 Health & Science Technologies 82.6 84.4 248.2 278.8 Fire & Safety/Diversified Products 54.7 52.8 159.9 157.0 Segment Adjusted EBITDA 235.8 240.8 719.7 759.7 Corporate and other (1) (21.5) (15.3) (72.9) (63.7) Interest expense – net (10.3) (13.7) (27.8) (40.1) Depreciation (2) (17.4) (14.7) (49.9) (41.9) Amortization of intangible assets (2) (26.5) (23.8) (75.0) (70.6) Fair value inventory step-up charges (2.1) (1.2) (4.6) (1.2) Restructuring expenses and asset impairments (3.0) (4.1) (5.4) (8.2) Gain on sale of business (3) (0.6) 93.8 4.0 93.8 Credit loss on note receivable from collaborative partner (4) — — — (7.7) Income before income taxes $ 154.4 $ 261.8 $ 488.1 $ 620.1 (1) Corporate expenses that can be identified with a segment have been included in determining segment results. The remainder are included in Corporate and other. (2) Depreciation and amortization of intangible assets by segment for the three and nine months ended September 30, 2024 and 2023 was: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Fluid & Metering Technologies Depreciation $ 4.3 $ 3.1 $ 12.9 $ 10.3 Amortization of intangible assets 5.2 5.6 15.7 17.3 Health & Science Technologies Depreciation 10.6 9.0 29.5 24.1 Amortization of intangible assets 19.7 16.7 54.6 48.5 Fire & Safety/Diversified Products Depreciation 2.2 2.3 6.7 6.7 Amortization of intangible assets 1.6 1.5 4.7 4.8 Corporate and other Depreciation 0.3 0.3 0.8 0.8 Total $ 43.9 $ 38.5 $ 124.9 $ 112.5 (3) Activity recorded during the three months ended September 30, 2024 represents the finalization of the gain on the sale of Alfa Valvole resulting in a $0.6 million downward adjustment during the third quarter of 2024. (4) Represents a reserve on an investment with a collaborative partner recorded in Other expense (income) – net during the nine months ended September 30, 2023. During the fourth quarter of 2023, the Company converted the promissory note receivable from the collaborative partner to equity, resulting in a cost method investment with zero value. September 30, 2024 December 31, 2023 ASSETS Fluid & Metering Technologies $ 1,668.7 $ 1,674.7 Health & Science Technologies 4,286.6 3,262.4 Fire & Safety/Diversified Products 818.5 792.6 Corporate and other 193.7 135.5 Total assets $ 6,967.5 $ 5,865.2

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 30, 2024
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregation of Revenue	Revenue by reporting unit for the three and nine months ended September 30, 2024 and 2023 was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Pumps $ 102.5 $ 94.7 $ 305.8 $ 309.0 Water 87.3 79.8 259.2 261.2 Energy 48.7 53.7 159.0 160.1 Agriculture 33.0 39.2 111.3 117.9 Valves 29.3 33.7 98.6 99.8 Intersegment elimination (0.2) (0.6) (0.9) (2.3) Fluid & Metering Technologies 300.6 300.5 933.0 945.7 Scientific Fluidics & Optics 167.6 162.1 487.9 509.7 Sealing Solutions 57.0 59.2 177.3 186.3 Performance Pneumatic Technologies 58.7 60.0 175.5 195.4 Material Processing Technologies 27.7 29.7 84.2 90.4 Micropump (1) — 2.2 — 21.9 Intersegment elimination (1.1) (0.5) (2.6) (2.3) Health & Science Technologies 309.9 312.7 922.3 1,001.4 Fire & Safety 123.2 112.0 340.0 328.0 Dispensing 35.4 41.9 122.0 122.8 BAND-IT 29.4 26.7 89.4 89.0 Intersegment elimination (0.3) (0.4) (0.8) (1.9) Fire & Safety/Diversified Products 187.7 180.2 550.6 537.9 Net sales $ 798.2 $ 793.4 $ 2,405.9 $ 2,485.0 (1)
Schedule of External Net Sales Disaggregated by Geography	Revenue by geographical region for the three and nine months ended September 30, 2024 and 2023 was as follows: Three Months Ended September 30, 2024 FMT HST FSDP IDEX U.S. $ 168.5 $ 139.9 $ 88.9 $ 397.3 North America, excluding U.S. 17.2 6.0 10.0 33.2 Europe 45.7 100.4 44.4 190.5 Asia 43.6 59.4 35.1 138.1 Other (1) 25.8 5.3 9.6 40.7 Intersegment elimination (0.2) (1.1) (0.3) (1.6) Net sales $ 300.6 $ 309.9 $ 187.7 $ 798.2 Three Months Ended September 30, 2023 FMT HST FSDP IDEX U.S. $ 168.4 $ 139.2 $ 94.4 $ 402.0 North America, excluding U.S. 15.5 3.2 8.8 27.5 Europe 52.3 106.0 39.0 197.3 Asia 43.1 57.8 29.0 129.9 Other (1) 21.8 7.0 9.4 38.2 Intersegment elimination (0.6) (0.5) (0.4) (1.5) Net sales $ 300.5 $ 312.7 $ 180.2 $ 793.4 Nine Months Ended September 30, 2024 FMT HST FSDP IDEX U.S. $ 522.3 $ 420.6 $ 259.5 $ 1,202.4 North America, excluding U.S. 50.8 16.3 26.3 93.4 Europe 159.8 303.0 135.7 598.5 Asia 129.8 168.9 102.3 401.0 Other (1) 71.2 16.1 27.6 114.9 Intersegment elimination (0.9) (2.6) (0.8) (4.3) Net sales $ 933.0 $ 922.3 $ 550.6 $ 2,405.9 Nine Months Ended September 30, 2023 FMT HST FSDP IDEX U.S. $ 525.9 $ 437.3 $ 280.5 $ 1,243.7 North America, excluding U.S. 52.8 16.6 25.4 94.8 Europe 163.0 338.1 126.1 627.2 Asia 137.0 189.6 80.4 407.0 Other (1) 69.3 22.1 27.4 118.8 Intersegment elimination (2.3) (2.3) (1.9) (6.5) Net sales $ 945.7 $ 1,001.4 $ 537.9 $ 2,485.0 (1)
Schedule of Contract with Customer, Asset and Liability	The composition of customer receivables was as follows: September 30, 2024 December 31, 2023 Billed receivables $ 451.4 $ 408.1 Unbilled receivables 15.9 10.9 Total customer receivables $ 467.3 $ 419.0
Schedule of New Accounting Pronouncements and Changes in Accounting Principles	The composition of deferred revenue was as follows: September 30, 2024 December 31, 2023 Deferred revenue – current $ 65.0 $ 55.9 Deferred revenue – noncurrent 16.3 17.3 Total deferred revenue $ 81.3 $ 73.2

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2024
Earnings Per Share [Abstract]
Schedule of Basic Weighted Average Shares Reconciles to Diluted Weighted Average Shares	Basic weighted average common shares outstanding reconciles to diluted weighted average common shares outstanding as follows: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Basic weighted average common shares outstanding 75.7 75.6 75.7 75.6 Dilutive effect of restricted stock, performance share units and stock options 0.2 0.3 0.2 0.3 Diluted weighted average common shares outstanding 75.9 75.9 75.9 75.9

Balance Sheet Components (Table

Balance Sheet Components (Tables)	9 Months Ended
	Sep. 30, 2024
Additional Financial Information Disclosure [Abstract]
Schedule of Balance Sheet Components	September 30, 2024 December 31, 2023 RECEIVABLES – NET Customers $ 467.3 $ 419.0 Other 16.0 16.3 Total 483.3 435.3 Less: allowance for credit losses 8.2 7.5 Receivables – net $ 475.1 $ 427.8 INVENTORIES – NET Raw materials and component parts $ 314.9 $ 268.1 Work in process 43.8 44.5 Finished goods 129.5 108.2 Inventories – net $ 488.2 $ 420.8 ACCRUED EXPENSES Payroll and related items $ 101.0 $ 97.1 Management incentive compensation 13.0 16.4 Income taxes payable 18.2 18.5 Deferred revenue 65.0 55.9 Lease liability 26.6 22.0 Other 77.4 61.6 Accrued expenses $ 301.2 $ 271.5

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Changes in Carrying Amount of Goodwill	The changes in the carrying amount of goodwill for the nine months ended September 30, 2024, by reportable business segment, were as follows: FMT HST FSDP IDEX Goodwill $ 805.7 $ 1,834.5 $ 398.7 $ 3,038.9 Accumulated goodwill impairment losses (20.7) (149.8) (30.1) (200.6) Balance at January 1, 2024 785.0 1,684.7 368.6 2,838.3 Foreign currency translation 0.3 5.2 1.3 6.8 Acquisitions — 480.3 — 480.3 Measurement period adjustments — 2.2 — 2.2 Divestitures (11.6) — — (11.6) Balance at September 30, 2024 $ 773.7 $ 2,172.4 $ 369.9 $ 3,316.0
Schedule of Gross Carrying Value and Accumulated Amortization For Each Major Class of Intangible Asset	The following table provides the gross carrying value and accumulated amortization for each major class of intangible asset at September 30, 2024 and December 31, 2023: September 30, 2024 December 31, 2023 Gross Accumulated Net Gross Accumulated Net Amortized intangible assets: Patents $ 2.7 $ (2.1) $ 0.6 $ 2.7 $ (2.0) $ 0.7 Trade names 207.0 (58.2) 148.8 171.9 (54.3) 117.6 Customer relationships 1,109.0 (266.3) 842.7 860.7 (228.7) 632.0 Unpatented technology 336.2 (82.3) 253.9 233.5 (66.3) 167.2 Software 15.6 (3.1) 12.5 5.3 (1.9) 3.4 Total amortized intangible assets 1,670.5 (412.0) 1,258.5 1,274.1 (353.2) 920.9 Indefinite-lived intangible assets: Banjo trade name 62.1 — 62.1 62.1 — 62.1 Akron Brass trade name 28.8 — 28.8 28.8 — 28.8 Total intangible assets $ 1,761.4 $ (412.0) $ 1,349.4 $ 1,365.0 $ (353.2) $ 1,011.8
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	Based on the intangible asset balances as of September 30, 2024 , expected amortization expense for the remaining three months of 2024 and for the years 2025 through 2028 is as follows: Estimated Amortization Remainder of 2024 $ 32.6 2025 128.1 2026 126.4 2027 122.7 2028 119.5

Borrowings (Tables)

Borrowings (Tables)	9 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
Schedule of Borrowings	Borrowings at September 30, 2024 and December 31, 2023 consisted of the following: September 30, 2024 December 31, 2023 3.37% Senior Notes, due June 2025 (the “3.37% Senior Notes”) (1) $ 100.0 $ 100.0 5.13% Senior Notes, due June 2028 (the “5.13% Senior Notes”) 100.0 100.0 4.950% Senior Notes, due September 2029 (the “4.950% Senior Notes”) 500.0 — 3.00% Senior Notes, due May 2030 (the “3.00% Senior Notes”) 500.0 500.0 2.625% Senior Notes, due June 2031 (the “2.625% Senior Notes”) 500.0 500.0 $800.0 million Revolving Facility, due November 2027 (the “Revolving Facility”) (2) 360.6 81.0 $200.0 million Term Facility, due November 2027 (the “Term Facility”) (3) 25.0 50.0 Other borrowings 1.8 2.3 Total borrowings 2,087.4 1,333.3 Less: current portion 0.6 0.6 Less: unamortized debt issuance costs and discount on debt 11.7 7.6 Long-term borrowings $ 2,075.1 $ 1,325.1 (1) As of September 30, 2024, the $100.0 million 3.37% Senior Notes, due in June 2025, have been classified as Long-term borrowings on the Condensed Consolidated Balance Sheets. The Company has the ability and intent to either refinance or repay these Notes using the available borrowing capacity of the Revolving Facility, due November 2027. (2) During the third quarter of 2024, the Company drew down an aggregate amount of $279.3 million under the Revolving Facility to finance a portion of Company’s acquisition of Mott. At September 30, 2024, there was $360.6 million outstanding under the Revolving Facility and $2.7 million of outstanding letters of credit, resulting in a net available borrowing capacity under the Revolving Facility of approximately $436.7 million. The weighted-average interest rate for borrowings outstanding under the Revolving Facility was 4.72% and 4.22% as of September 30, 2024 and December 31, 2023, respectively. During October 2024, the Company repaid $69.1 million of the $360.6 million outstanding under the Revolving Facility. (3) The weighted-average interest rate for borrowings outstanding under the Term Facility was 6.55% and 6.22% as of September 30, 2024 and December 31, 2023, respectively. During the second quarter of 2024, the Company repaid $25.0 million of the $50.0 million previously outstanding under the Term Facility. During October 2024, the Company repaid the remaining $25.0 million outstanding under the Term Facility.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Schedule of Company's Financial Assets and (Liabilities) at Fair Value on Recurring Basis	The following table summarizes the basis used to measure the Company’s financial assets (liabilities) at fair value on a recurring basis in the balance sheets at September 30, 2024 and December 31, 2023: Basis of Fair Value Measurements September 30, 2024 December 31, 2023 Level 1 Level 1 Trading securities - mutual funds held in nonqualified SERP (1) $ 10.4 $ 10.5 Available-for-sale securities - equities (2) — 4.4 (1) The Supplemental Executive Retirement Plan (“SERP”) investment assets are offset by a SERP liability which represents the Company’s obligation to distribute SERP funds to participants. The SERP investment assets and liability are included in Other noncurrent assets and Other noncurrent liabilities, respectively, on the Condensed Consolidated Balance Sheets. (2) The securities are included in Other current assets on the Condensed Consolidated Balance Sheets and are available for overnight cash settlement, if necessary, to fund current operations.
Schedule of Fair Value of the Outstanding Indebtedness	The following table provides the fair value of the outstanding indebtedness described in Note 8 , “Borrowings,” which is based on quoted market prices and current market rates for debt with similar credit risk and maturity, as well as the carrying value. These fair value measurements are classified as Level 2 within the fair value hierarchy since they are determined based upon significant inputs observable in the market, including interest rates on recent financing transactions to entities with a credit rating similar to the Company’s rating. September 30, 2024 December 31, 2023 Fair Value Carrying Amount Fair Value Carrying Amount Total Borrowings, less unaccreted debt discount $ 2,014.7 $ 2,086.1 $ 1,203.5 $ 1,332.2

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	9 Months Ended
	Sep. 30, 2024
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Loss	The components of Accumulated other comprehensive loss for the three and nine months ended September 30, 2024 and 2023 are as follows: Cumulative Translation Adjustment Pension and Other Postretirement Adjustments Accumulated Other Comprehensive Loss Three Months Ended September 30, 2024 Balance, June 30, 2024 (1) $ (119.6) $ 3.2 $ (116.4) Other comprehensive income before reclassification adjustments 91.8 — 91.8 Gain reclassified from Accumulated other comprehensive loss (2)(3) — (0.2) (0.2) Tax impact — 0.1 0.1 Net other comprehensive income (loss) (1) 91.8 (0.1) 91.7 Balance, September 30, 2024 (1) $ (27.8) $ 3.1 $ (24.7) Nine Months Ended September 30, 2024 Balance, December 31, 2023 (1) $ (49.3) $ 3.5 $ (45.8) Other comprehensive income before reclassification adjustments 16.0 — 16.0 Gain reclassified from Accumulated other comprehensive loss (2)(3) — (0.6) (0.6) Loss reclassified related to divestitures (4) 5.5 — 5.5 Tax impact — 0.2 0.2 Net other comprehensive income (loss) (1) 21.5 (0.4) 21.1 Balance, September 30, 2024 (1) $ (27.8) $ 3.1 $ (24.7) Three Months Ended September 30, 2023 Balance, June 30, 2023 (1) $ (98.2) $ 10.4 $ (87.8) Other comprehensive loss before reclassification adjustments (58.1) — (58.1) Gain reclassified from Accumulated other comprehensive loss (2)(3) — (0.3) (0.3) Tax impact — — — Net other comprehensive loss (1) (58.1) (0.3) (58.4) Balance, September 30, 2023 (1) $ (156.3) $ 10.1 $ (146.2) Nine Months Ended September 30, 2023 Balance, December 31, 2022 (1) $ (137.1) $ 10.9 $ (126.2) Other comprehensive loss before reclassification adjustments (19.2) — (19.2) Gain reclassified from Accumulated other comprehensive loss (2)(3) — (1.0) (1.0) Tax impact — 0.2 0.2 Net other comprehensive loss (1) (19.2) (0.8) (20.0) Balance, September 30, 2023 (1) $ (156.3) $ 10.1 $ (146.2) (1) Amounts are presented net of tax. (2) Included in the computation of net periodic cost. See Note 13 , “Retirement Benefits.” (3) Included in Other expense (income) – net in the Condensed Consolidated Statements of Income. (4) In conjunction with the divestiture of Alfa Valvole during the second quarter of 2024, the Company released associated cumulative foreign currency translation losses and included the release as part of the gain on sale of business.

Share-Based Compensation (Table

Share-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]
Schedule of Weighted Average Option Fair Values and Assumptions	The assumptions used in determining the fair value of the stock options granted in the respective periods were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Weighted average fair value of grants $49.83 $56.47 $63.63 $60.49 Dividend yield 1.42% 1.20% 1.09% 1.07% Volatility 26.47% 26.78% 26.66% 27.17% Risk-free interest rate 4.08% 4.26% 4.31% 4.12% Expected life (in years) 4.60 4.50 4.60 4.50
Schedule of Stock Option Activity	A summary of the Company’s stock option activity as of September 30, 2024 and changes during the nine months ended September 30, 2024 are presented in the following table: Stock Options Shares Weighted Weighted-Average Aggregate Outstanding at January 1, 2024 983,267 $ 178.86 6.88 $ 39.3 Granted 196,600 234.59 Exercised (79,005) 155.56 Forfeited (38,796) 205.39 Outstanding at September 30, 2024 1,062,066 $ 189.84 6.78 $ 31.9 Vested and expected to vest as of September 30, 2024 1,025,776 $ 188.79 6.71 $ 31.7 Exercisable at September 30, 2024 603,219 $ 168.07 5.47 $ 28.7
Schedule of Restricted Stock Activity	A summary of the Company’s restricted stock activity as of September 30, 2024 and changes during the nine months ended September 30, 2024 are presented in the following table: Restricted Stock Shares Weighted-Average Unvested at January 1, 2024 112,891 $ 193.03 Granted 102,915 211.55 Vested (24,125) 201.52 Forfeited (11,600) 210.94 Unvested at September 30, 2024 180,081 $ 201.32
Schedule of Unvested Cash-settled Restricted Stock Activity	A summary of the Company’s unvested cash-settled restricted stock activity as of September 30, 2024 and changes during the nine months ended September 30, 2024 are presented in the following table: Cash-Settled Restricted Stock Shares Weighted-Average Unvested at January 1, 2024 56,655 $ 217.11 Granted 23,555 229.87 Vested (15,275) 235.39 Forfeited (5,430) 214.50 Unvested at September 30, 2024 59,505 $ 214.50
Schedule of Weighted Average Performance Share Units Fair Values and Assumptions	The performance share units are market condition awards and have been assessed at fair value on the date of grant using a Monte Carlo simulation model. The assumptions used in determining the fair value of the performance share units granted in the respective periods were as follows: Nine Months Ended September 30, 2024 2023 Weighted average fair value of grants $349.59 $308.18 Dividend yield —% —% Volatility 22.23% 27.00% Risk-free interest rate 4.45% 4.37% Expected life (in years) 2.94 2.94
Schedule of Performance Shares Units Activity	A summary of the Company’s performance share unit activity as of September 30, 2024 and changes during the nine months ended September 30, 2024 are presented in the following table: Performance Share Units Shares Weighted-Average Unvested at January 1, 2024 67,455 $ 265.15 Granted 27,135 349.59 Vested (9,606) 245.40 Forfeited (11,444) 252.92 Unvested at September 30, 2024 73,540 $ 300.35
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs	Pre-tax compensation cost is recognized in both Cost of sales and Selling, general and administrative expenses in the Condensed Consolidated Statements of Income depending on the functional area of the underlying employees. Total compensation cost related to all share-based awards was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Stock options expense $ 1.5 $ 1.1 $ 8.4 $ 8.7 Restricted stock expense 1.6 1.1 5.7 4.4 Cash-settled restricted stock expense 1.2 0.6 2.8 2.3 Performance share units expense (1) 0.9 (0.3) 6.8 5.7 Total pre-tax share-based compensation expense 5.2 2.5 23.7 21.1 Income tax benefit (0.7) (0.5) (2.3) (2.1) Total share-based compensation expense, net of income taxes $ 4.5 $ 2.0 $ 21.4 $ 19.0 (1) Performance share units expense for the three and nine months ended September 30, 2023 reflects lower expense of $1.1 million of executive forfeitures, which occurred during the third quarter of 2023.

Retirement Benefits (Tables)

Retirement Benefits (Tables)	9 Months Ended
	Sep. 30, 2024
Retirement Benefits [Abstract]
Schedule of Components of Net Periodic Benefit Cost for Defined Benefit Plans and Other Postretirement Plans	The following tables provide the components of net periodic cost for its major defined benefit plans and its other postretirement plans. Pension Benefits Three Months Ended September 30, 2024 2023 U.S. Non-U.S. U.S. Non-U.S. Service cost $ 0.1 $ 0.3 $ 0.1 $ 0.3 Interest cost 0.1 0.6 0.1 0.6 Expected return on plan assets (0.1) (0.4) (0.1) (0.4) Net amortization — — — (0.1) Net periodic cost $ 0.1 $ 0.5 $ 0.1 $ 0.4 Pension Benefits Nine Months Ended September 30, 2024 2023 U.S. Non-U.S. U.S. Non-U.S. Service cost $ 0.1 $ 1.1 $ 0.1 $ 0.9 Interest cost 0.3 1.9 0.3 2.0 Expected return on plan assets (0.2) (1.3) (0.2) (1.2) Net amortization 0.2 (0.1) 0.1 (0.4) Net periodic cost $ 0.4 $ 1.6 $ 0.3 $ 1.3 Other Postretirement Benefits Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Service cost $ 0.2 $ 0.1 $ 0.4 $ 0.3 Interest cost 0.2 0.2 0.6 0.6 Net amortization (0.2) (0.2) (0.7) (0.7) Net periodic cost $ 0.2 $ 0.1 $ 0.3 $ 0.2

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Schedule of Provision for Income Taxes and the Effective Tax Rate	The Company’s provision for income taxes is based upon estimated annual tax rates for the year applied to federal income as well as state and foreign income in various jurisdictions, permanent differences between book and tax items, tax credits and the Company’s change in relative income in each jurisdiction. The provision for income taxes and the effective tax rates for the periods presented were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Income before income taxes $ 154.4 $ 261.8 $ 488.1 $ 620.1 Provision for income taxes 35.5 52.8 106.7 132.8 Effective tax rate 22.9 % 20.2 % 21.9 % 21.4 %

Acquisitions and Divestitures -

Acquisitions and Divestitures - Narrative (Details) - USD ($) $ in Millions				3 Months Ended		9 Months Ended
	Sep. 05, 2024	Dec. 14, 2023	May 19, 2023	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Aug. 21, 2024	Dec. 31, 2023
Business Acquisition [Line Items]
Measurement period						1 year
Borrowings under revolving credit facility						$ 279.3	$ 0
Goodwill				$ 3,316		3,316			$ 2,838.3
Selling, general and administrative expenses
Business Acquisition [Line Items]
Acquisition-related transaction costs				$ 5.5	$ 1.8	$ 9.3	5.4
Senior Notes | 4.950% Senior Notes
Business Acquisition [Line Items]
Interest rate on senior notes				4.95%		4.95%		4.95%
Mott Corporation
Business Acquisition [Line Items]
Aggregate purchase price, cash paid	$ 986.2
Cash acquired	3.1
Goodwill	480.3
Intangible assets	415.8
Inventory adjustment				$ 2.1		$ 4.6
Mott Corporation | Line of Credit | Revolving Facility
Business Acquisition [Line Items]
Borrowings under revolving credit facility	279.3
Mott Corporation | Senior Notes | 4.950% Senior Notes
Business Acquisition [Line Items]
Proceeds from issuance of debt	495
Mott Corporation | Cash On Hand
Business Acquisition [Line Items]
Aggregate purchase price, cash paid	$ 211.9
Iridian
Business Acquisition [Line Items]
Aggregate purchase price, cash paid			$ 109.8
Goodwill			54.2
Intangible assets			$ 44.1
Inventory adjustment					$ 1.2		$ 1.2
STC,LLC
Business Acquisition [Line Items]
Aggregate purchase price, cash paid		$ 200.4
Goodwill		104.7
Intangible assets		$ 92.3

Acquisitions and Divestitures_2

Acquisitions and Divestitures - Allocation of Acquisition Costs to Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	1 Months Ended
	Apr. 30, 2024	Sep. 30, 2024	Sep. 05, 2024	Dec. 31, 2023	Dec. 14, 2023	May 19, 2023
Business Acquisition [Line Items]
Goodwill		$ 3,316		$ 2,838.3
Mott Corporation
Business Acquisition [Line Items]
Current assets, net of cash acquired			$ 97
Property, plant and equipment			46
Goodwill			480.3
Intangible assets			415.8
Other noncurrent assets			12.6
Total assets acquired			1,051.7
Current liabilities			(40.7)
Deferred income taxes			(13)
Other noncurrent liabilities			(11.8)
Net assets acquired			$ 986.2
Iridian
Business Acquisition [Line Items]
Current assets, net of cash acquired						$ 10.6
Property, plant and equipment						19.4
Goodwill						54.2
Intangible assets						44.1
Other noncurrent assets						5.4
Total assets acquired						133.7
Current liabilities						(1.2)
Deferred income taxes						(17.8)
Other noncurrent liabilities						(4.9)
Net assets acquired						$ 109.8
STC,LLC
Business Acquisition [Line Items]
Current assets, net of cash acquired					$ 16.9
Property, plant and equipment					12.2
Goodwill					104.7
Intangible assets					92.3
Other noncurrent assets					2.9
Total assets acquired					229
Current liabilities					(5.5)
Deferred income taxes					(20.4)
Other noncurrent liabilities					(2.7)
Net assets acquired					$ 200.4
Adjustment to purchase price	$ 1.6

Acquisitions and Divestitures_3

Acquisitions and Divestitures - Acquired Intangible Assets and Weighted Average Amortization Periods (Details) - USD ($) $ in Millions	Sep. 05, 2024	Dec. 14, 2023	May 19, 2023
Mott Corporation
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, Total	$ 415.8
Mott Corporation | Trade names
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, Total	$ 42
Acquired intangible assets, Weighted Average Life	15 years
Mott Corporation | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, Total	$ 272
Acquired intangible assets, Weighted Average Life	14 years
Mott Corporation | Unpatented technology
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, Total	$ 101.8
Acquired intangible assets, Weighted Average Life	13 years
Iridian
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, Total			$ 44.1
Iridian | Trade names
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, Total			$ 5.2
Acquired intangible assets, Weighted Average Life			15 years
Iridian | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, Total			$ 27.8
Acquired intangible assets, Weighted Average Life			12 years
Iridian | Unpatented technology
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, Total			$ 11.1
Acquired intangible assets, Weighted Average Life			11 years
STC,LLC
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, Total		$ 92.3
STC,LLC | Trade names
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, Total		$ 9.3
Acquired intangible assets, Weighted Average Life		15 years
STC,LLC | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, Total		$ 63
Acquired intangible assets, Weighted Average Life		15 years
STC,LLC | Unpatented technology
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, Total		$ 20
Acquired intangible assets, Weighted Average Life		11 years

Acquisitions and Divestitures_4

Acquisitions and Divestitures - Divestitures (Details) - USD ($)			3 Months Ended		9 Months Ended
	Jun. 03, 2024	Aug. 03, 2023	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Business Acquisition [Line Items]
Gain on sale of business			$ (600,000)	$ 93,800,000	$ 4,000,000	$ 93,800,000
Provision for income taxes			(35,500,000)	(52,800,000)	$ (106,700,000)	(132,800,000)
Disposed of by Sale | Alfa Valvole Srl
Business Acquisition [Line Items]
Proceeds from sale of businesses, net of cash remitted	$ 45,100,000
Gain on sale of business	4,600,000		4,000,000
Foreign currency translation adjustment, net of tax	5,500,000
Adjustment to gain on sale			$ 600,000
Provision for income taxes	$ 0
Disposed of by Sale | Micropump, Inc.
Business Acquisition [Line Items]
Proceeds from sale of businesses, net of cash remitted		$ 110,300,000
Gain on sale of business		$ 93,800,000
Provision for income taxes				$ (22,700,000)		$ (22,700,000)

Business Segments - Narrative (

Business Segments - Narrative (Details)	9 Months Ended
	Sep. 30, 2024 segment
Segment Reporting [Abstract]
Number of reportable business segments	3

Business Segments - Schedule of

Business Segments - Schedule of Information on Company's Business Segments (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Jun. 03, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Net sales		$ 798.2	$ 793.4	$ 2,405.9	$ 2,485
Interest expense – net		(10.3)	(13.7)	(27.8)	(40.1)
Depreciation		(17.4)	(14.7)	(49.9)	(41.9)
Amortization of intangible assets		(26.5)	(23.8)	(75)	(70.6)
Fair value inventory step-up charges		(2.1)	(1.2)	(4.6)	(1.2)
Restructuring expenses and asset impairments		(3)	(4.1)	(5.4)	(8.2)
Gain on sale of business		(0.6)	93.8	4	93.8
Credit loss on note receivable from collaborative partner		0	0	0	(7.7)
Income before income taxes		154.4	261.8	488.1	620.1
Depreciation and amortization of intangible assets		43.9	38.5	124.9	112.5
Total assets		6,967.5		6,967.5		$ 5,865.2
Disposed of by Sale | Alfa Valvole Srl
Segment Reporting Information [Line Items]
Gain on sale of business	$ 4.6	4
Adjustment to gain on sale		0.6
Intersegment eliminations
Segment Reporting Information [Line Items]
Net sales		(1.6)	(1.5)	(4.3)	(6.5)
Operating segments
Segment Reporting Information [Line Items]
ADJUSTED EBITDA		235.8	240.8	719.7	759.7
Corporate and other
Segment Reporting Information [Line Items]
ADJUSTED EBITDA		(21.5)	(15.3)	(72.9)	(63.7)
Depreciation		(0.3)	(0.3)	(0.8)	(0.8)
Total assets		193.7		193.7		135.5
Fluid & Metering Technologies
Segment Reporting Information [Line Items]
Net sales		300.6	300.5	933	945.7
Income before income taxes		154.4	261.8	488.1	620.1
Fluid & Metering Technologies | Intersegment eliminations
Segment Reporting Information [Line Items]
Net sales		0.2	0.6	0.9	2.3
Fluid & Metering Technologies | Operating segments
Segment Reporting Information [Line Items]
Net sales		300.8	301.1	933.9	948
ADJUSTED EBITDA		98.5	103.6	311.6	323.9
Depreciation		(4.3)	(3.1)	(12.9)	(10.3)
Amortization of intangible assets		(5.2)	(5.6)	(15.7)	(17.3)
Total assets		1,668.7		1,668.7		1,674.7
Health & Science Technologies
Segment Reporting Information [Line Items]
Net sales		309.9	312.7	922.3	1,001.4
Health & Science Technologies | Intersegment eliminations
Segment Reporting Information [Line Items]
Net sales		1.1	0.5	2.6	2.3
Health & Science Technologies | Operating segments
Segment Reporting Information [Line Items]
Net sales		311	313.2	924.9	1,003.7
ADJUSTED EBITDA		82.6	84.4	248.2	278.8
Depreciation		(10.6)	(9)	(29.5)	(24.1)
Amortization of intangible assets		(19.7)	(16.7)	(54.6)	(48.5)
Total assets		4,286.6		4,286.6		3,262.4
Fire & Safety/Diversified Products
Segment Reporting Information [Line Items]
Net sales		187.7	180.2	550.6	537.9
Fire & Safety/Diversified Products | Intersegment eliminations
Segment Reporting Information [Line Items]
Net sales		0.3	0.4	0.8	1.9
Fire & Safety/Diversified Products | Operating segments
Segment Reporting Information [Line Items]
Net sales		188	180.6	551.4	539.8
ADJUSTED EBITDA		54.7	52.8	159.9	157
Depreciation		(2.2)	(2.3)	(6.7)	(6.7)
Amortization of intangible assets		(1.6)	$ (1.5)	(4.7)	$ (4.8)
Total assets		$ 818.5		$ 818.5		$ 792.6

Revenue - Revenue by Reporting

Revenue - Revenue by Reporting Unit (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Net sales	$ 798.2	$ 793.4	$ 2,405.9	$ 2,485
Fluid & Metering Technologies
Disaggregation of Revenue [Line Items]
Net sales	300.6	300.5	933	945.7
Health & Science Technologies
Disaggregation of Revenue [Line Items]
Net sales	309.9	312.7	922.3	1,001.4
Fire & Safety/Diversified Products
Disaggregation of Revenue [Line Items]
Net sales	187.7	180.2	550.6	537.9
Operating segments | Fluid & Metering Technologies
Disaggregation of Revenue [Line Items]
Net sales	300.6	300.5	933	945.7
Operating segments | Fluid & Metering Technologies | Pumps
Disaggregation of Revenue [Line Items]
Net sales	102.5	94.7	305.8	309
Operating segments | Fluid & Metering Technologies | Water
Disaggregation of Revenue [Line Items]
Net sales	87.3	79.8	259.2	261.2
Operating segments | Fluid & Metering Technologies | Energy
Disaggregation of Revenue [Line Items]
Net sales	48.7	53.7	159	160.1
Operating segments | Fluid & Metering Technologies | Agriculture
Disaggregation of Revenue [Line Items]
Net sales	33	39.2	111.3	117.9
Operating segments | Fluid & Metering Technologies | Valves
Disaggregation of Revenue [Line Items]
Net sales	29.3	33.7	98.6	99.8
Operating segments | Health & Science Technologies
Disaggregation of Revenue [Line Items]
Net sales	309.9	312.7	922.3	1,001.4
Operating segments | Health & Science Technologies | Scientific Fluidics & Optics
Disaggregation of Revenue [Line Items]
Net sales	167.6	162.1	487.9	509.7
Operating segments | Health & Science Technologies | Sealing Solutions
Disaggregation of Revenue [Line Items]
Net sales	57	59.2	177.3	186.3
Operating segments | Health & Science Technologies | Performance Pneumatic Technologies
Disaggregation of Revenue [Line Items]
Net sales	58.7	60	175.5	195.4
Operating segments | Health & Science Technologies | Material Processing Technologies
Disaggregation of Revenue [Line Items]
Net sales	27.7	29.7	84.2	90.4
Operating segments | Health & Science Technologies | Micropump
Disaggregation of Revenue [Line Items]
Net sales	0	2.2	0	21.9
Operating segments | Fire & Safety/Diversified Products
Disaggregation of Revenue [Line Items]
Net sales	187.7	180.2	550.6	537.9
Operating segments | Fire & Safety/Diversified Products | Fire & Safety
Disaggregation of Revenue [Line Items]
Net sales	123.2	112	340	328
Operating segments | Fire & Safety/Diversified Products | Dispensing
Disaggregation of Revenue [Line Items]
Net sales	35.4	41.9	122	122.8
Operating segments | Fire & Safety/Diversified Products | BAND-IT
Disaggregation of Revenue [Line Items]
Net sales	29.4	26.7	89.4	89
Intersegment eliminations
Disaggregation of Revenue [Line Items]
Net sales	(1.6)	(1.5)	(4.3)	(6.5)
Intersegment eliminations | Fluid & Metering Technologies
Disaggregation of Revenue [Line Items]
Net sales	(0.2)	(0.6)	(0.9)	(2.3)
Intersegment eliminations | Health & Science Technologies
Disaggregation of Revenue [Line Items]
Net sales	(1.1)	(0.5)	(2.6)	(2.3)
Intersegment eliminations | Fire & Safety/Diversified Products
Disaggregation of Revenue [Line Items]
Net sales	$ (0.3)	$ (0.4)	$ (0.8)	$ (1.9)

Revenue - Revenue by Geography

Revenue - Revenue by Geography (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Net sales	$ 798.2	$ 793.4	$ 2,405.9	$ 2,485
Intersegment eliminations
Disaggregation of Revenue [Line Items]
Net sales	(1.6)	(1.5)	(4.3)	(6.5)
U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	397.3	402	1,202.4	1,243.7
North America, excluding U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	33.2	27.5	93.4	94.8
Europe | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	190.5	197.3	598.5	627.2
Asia | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	138.1	129.9	401	407
Other | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	40.7	38.2	114.9	118.8
FMT
Disaggregation of Revenue [Line Items]
Net sales	300.6	300.5	933	945.7
FMT | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	300.6	300.5	933	945.7
FMT | Intersegment eliminations
Disaggregation of Revenue [Line Items]
Net sales	(0.2)	(0.6)	(0.9)	(2.3)
FMT | U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	168.5	168.4	522.3	525.9
FMT | North America, excluding U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	17.2	15.5	50.8	52.8
FMT | Europe | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	45.7	52.3	159.8	163
FMT | Asia | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	43.6	43.1	129.8	137
FMT | Other | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	25.8	21.8	71.2	69.3
HST
Disaggregation of Revenue [Line Items]
Net sales	309.9	312.7	922.3	1,001.4
HST | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	309.9	312.7	922.3	1,001.4
HST | Intersegment eliminations
Disaggregation of Revenue [Line Items]
Net sales	(1.1)	(0.5)	(2.6)	(2.3)
HST | U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	139.9	139.2	420.6	437.3
HST | North America, excluding U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	6	3.2	16.3	16.6
HST | Europe | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	100.4	106	303	338.1
HST | Asia | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	59.4	57.8	168.9	189.6
HST | Other | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	5.3	7	16.1	22.1
FSDP
Disaggregation of Revenue [Line Items]
Net sales	187.7	180.2	550.6	537.9
FSDP | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	187.7	180.2	550.6	537.9
FSDP | Intersegment eliminations
Disaggregation of Revenue [Line Items]
Net sales	(0.3)	(0.4)	(0.8)	(1.9)
FSDP | U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	88.9	94.4	259.5	280.5
FSDP | North America, excluding U.S. | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	10	8.8	26.3	25.4
FSDP | Europe | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	44.4	39	135.7	126.1
FSDP | Asia | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	35.1	29	102.3	80.4
FSDP | Other | Operating segments
Disaggregation of Revenue [Line Items]
Net sales	$ 9.6	$ 9.4	$ 27.6	$ 27.4

Revenue - Performance Obligatio

Revenue - Performance Obligations (Details) - Revenue from Contract with Customer - Product Concentration Risk	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenue from products and services transferred to customers	95%	95%	95%	95%
Transferred over Time
Disaggregation of Revenue [Line Items]
Revenue from products and services transferred to customers	5%	5%	5%	5%

Revenue - Receivables (Details)

Revenue - Receivables (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total customer receivables	$ 467.3	$ 419
Unbilled receivables	15.9	10.9
Billed receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total customer receivables	$ 451.4	$ 408.1

Revenue - Deferred Revenue (Det

Revenue - Deferred Revenue (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Deferred revenue – current	$ 65	$ 55.9
Deferred revenue – noncurrent	16.3	17.3
Total deferred revenue	$ 81.3	$ 73.2

Earnings Per Common Share - Sch

Earnings Per Common Share - Schedule of Basic Weighted Average Shares Reconciles to Diluted Weighted Average Shares Outstanding (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Basic weighted average common shares outstanding (in shares)	75.7	75.6	75.7	75.6
Dilutive effect of restricted stock, performance share units and stock options (in shares)	0.2	0.3	0.2	0.3
Diluted weighted average common shares outstanding (in shares)	75.9	75.9	75.9	75.9

Earnings Per Common Share - Nar

Earnings Per Common Share - Narrative (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Antidilutive shares not included in Diluted EPS attributable to IDEX (in shares)	0.5	0.2	0.5	0.2

Balance Sheet Components (Detai

Balance Sheet Components (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
RECEIVABLES – NET
Customers	$ 467.3	$ 419
Other	16	16.3
Total	483.3	435.3
Less: allowance for credit losses	8.2	7.5
Receivables – net	475.1	427.8
INVENTORIES – NET
Raw materials and component parts	314.9	268.1
Work in process	43.8	44.5
Finished goods	129.5	108.2
Inventories – net	488.2	420.8
ACCRUED EXPENSES
Payroll and related items	101	97.1
Management incentive compensation	13	16.4
Income taxes payable	18.2	18.5
Deferred revenue	65	55.9
Lease liability	26.6	22
Accrued expenses	301.2	271.5
Other	$ 77.4	$ 61.6

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Line Items]
Goodwill		$ 3,038.9
Accumulated goodwill impairment losses		(200.6)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 2,838.3
Foreign currency translation	6.8
Acquisitions	480.3
Measurement period adjustments	2.2
Divestitures	(11.6)
Goodwill, ending balance	3,316
FMT
Goodwill and Intangible Assets Disclosure [Line Items]
Goodwill		805.7
Accumulated goodwill impairment losses		(20.7)
Goodwill [Roll Forward]
Goodwill, beginning balance	785
Foreign currency translation	0.3
Acquisitions	0
Measurement period adjustments	0
Divestitures	(11.6)
Goodwill, ending balance	773.7
HST
Goodwill and Intangible Assets Disclosure [Line Items]
Goodwill		1,834.5
Accumulated goodwill impairment losses		(149.8)
Goodwill [Roll Forward]
Goodwill, beginning balance	1,684.7
Foreign currency translation	5.2
Acquisitions	480.3
Measurement period adjustments	2.2
Divestitures	0
Goodwill, ending balance	2,172.4
FSDP
Goodwill and Intangible Assets Disclosure [Line Items]
Goodwill		398.7
Accumulated goodwill impairment losses		$ (30.1)
Goodwill [Roll Forward]
Goodwill, beginning balance	368.6
Foreign currency translation	1.3
Acquisitions	0
Measurement period adjustments	0
Divestitures	0
Goodwill, ending balance	$ 369.9

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Schedule of Gross Carrying Value and Accumulated Amortization for Each Major Class of Intangible Asset (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - gross carrying amount	$ 1,670.5	$ 1,274.1
Amortized intangible assets - accumulated amortization	(412)	(353.2)
Amortized intangible assets - net	1,258.5	920.9
Intangible assets - gross carrying amount	1,761.4	1,365
Intangible assets - net	1,349.4	1,011.8
Banjo trade name
Goodwill And Intangible Assets [Line Items]
Indefinite lived intangible assets - net	62.1	62.1
Akron Brass trade name
Goodwill And Intangible Assets [Line Items]
Indefinite lived intangible assets - net	28.8	28.8
Patents
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - gross carrying amount	2.7	2.7
Amortized intangible assets - accumulated amortization	(2.1)	(2)
Amortized intangible assets - net	0.6	0.7
Trade names
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - gross carrying amount	207	171.9
Amortized intangible assets - accumulated amortization	(58.2)	(54.3)
Amortized intangible assets - net	148.8	117.6
Customer relationships
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - gross carrying amount	1,109	860.7
Amortized intangible assets - accumulated amortization	(266.3)	(228.7)
Amortized intangible assets - net	842.7	632
Unpatented technology
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - gross carrying amount	336.2	233.5
Amortized intangible assets - accumulated amortization	(82.3)	(66.3)
Amortized intangible assets - net	253.9	167.2
Software
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - gross carrying amount	15.6	5.3
Amortized intangible assets - accumulated amortization	(3.1)	(1.9)
Amortized intangible assets - net	$ 12.5	$ 3.4

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 26.5	$ 23.8	$ 75	$ 70.6

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets - Schedule of Finite Lived Intangible Assets Future Amortization Expense (Details) $ in Millions	Sep. 30, 2024 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2024	$ 32.6
2025	128.1
2026	126.4
2027	122.7
2028	$ 119.5

Borrowings - Schedule of Borrow

Borrowings - Schedule of Borrowings (Details) - USD ($)		1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 05, 2024	Oct. 30, 2024	Sep. 30, 2024	Sep. 30, 2024	Sep. 30, 2023	Aug. 21, 2024	Jun. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total borrowings			$ 2,087,400,000	$ 2,087,400,000				$ 1,333,300,000
Other borrowings			1,800,000	1,800,000				2,300,000
Less: current portion			600,000	600,000				600,000
Less: unamortized debt issuance costs and discount on debt			11,700,000	11,700,000				7,600,000
Long-term borrowings			2,075,100,000	2,075,100,000				1,325,100,000
Proceeds from issuance of debt				279,300,000	$ 0
Revolving Facility
Debt Instrument [Line Items]
Letters of credit outstanding			2,700,000	2,700,000
Amount available to borrow			$ 436,700,000	$ 436,700,000
Senior Notes | 3.37% Senior Notes, due June 2025 (the “3.37% Senior Notes”)(1)
Debt Instrument [Line Items]
Stated interest rate			3.37%	3.37%
Total borrowings			$ 100,000,000	$ 100,000,000				100,000,000
Senior Notes | 5.13% Senior Notes, due June 2028 (the “5.13% Senior Notes”)
Debt Instrument [Line Items]
Stated interest rate			5.13%	5.13%
Total borrowings			$ 100,000,000	$ 100,000,000				100,000,000
Senior Notes | 4.950% Senior Notes, due September 2029 (the “4.950% Senior Notes”)
Debt Instrument [Line Items]
Stated interest rate			4.95%	4.95%		4.95%
Total borrowings			$ 500,000,000	$ 500,000,000				0
Senior Notes | 3.00% Senior Notes, due May 2030 (the “3.00% Senior Notes”)
Debt Instrument [Line Items]
Stated interest rate			3%	3%
Total borrowings			$ 500,000,000	$ 500,000,000				500,000,000
Senior Notes | 2.625% Senior Notes, due June 2031 (the “2.625% Senior Notes”)
Debt Instrument [Line Items]
Stated interest rate			2.625%	2.625%
Total borrowings			$ 500,000,000	$ 500,000,000				500,000,000
Line of Credit | Revolving Facility
Debt Instrument [Line Items]
Borrowing capacity			800,000,000	800,000,000
Long-term debt, gross			$ 360,600,000	$ 360,600,000				$ 81,000,000
Weighted average interest rate			4.72%	4.72%				4.22%
Line of Credit | Revolving Facility | Subsequent Event
Debt Instrument [Line Items]
Extinguishment of debt		$ 69,100,000
Line of Credit | Revolving Facility | Mott Corporation
Debt Instrument [Line Items]
Proceeds from issuance of debt	$ 279,300,000
Line of Credit | Secured Debt
Debt Instrument [Line Items]
Borrowing capacity			$ 200,000,000	$ 200,000,000
Long-term debt, gross			$ 25,000,000	$ 25,000,000			$ 50,000,000	$ 50,000,000
Weighted average interest rate			6.55%	6.55%				6.22%
Extinguishment of debt			$ 25,000,000
Line of Credit | Secured Debt | Subsequent Event
Debt Instrument [Line Items]
Extinguishment of debt		$ 25,000,000

Borrowings - Narrative (Details

Borrowings - Narrative (Details) - Senior Notes - 4.950% Senior Notes, due September 2029 (the “4.950% Senior Notes”) - USD ($)	Aug. 21, 2024	Sep. 30, 2024
Line of Credit Facility [Line Items]
Interest rate on senior notes	4.95%	4.95%
Face amount of debt	$ 500,000,000
Redemption price, percentage	101%

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Company Financial Assets and Liabilities at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - Level 1 - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Mutual Funds Held in Nonqualified SERP
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	$ 10.4	$ 10.5
Equities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	$ 0	$ 4.4

Fair Value Measurements - Sch_2

Fair Value Measurements - Schedule of Fair Value of Debt Outstanding (Details) - Level 2 - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Borrowings, less unaccreted debt discount	$ 2,014.7	$ 1,203.5
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Borrowings, less unaccreted debt discount	$ 2,086.1	$ 1,332.2

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 3,653.4	$ 3,278.9	$ 3,541.2	$ 3,039.6
Other comprehensive income (loss) before reclassification adjustments	91.8	(58.1)	16	(19.2)
Gain reclassified from Accumulated other comprehensive loss	(0.2)	(0.3)	(0.6)	(1)
Loss reclassified related to divestitures			5.5
Tax impact	0.1	0	0.2	0.2
Other comprehensive income (loss), net of tax	91.7	(58.4)	21.1	(20)
Ending balance	3,818.3	3,387.2	3,818.3	3,387.2
Accumulated Other Comprehensive Loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(116.4)	(87.8)	(45.8)	(126.2)
Ending balance	(24.7)	(146.2)	(24.7)	(146.2)
Cumulative Translation Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(119.6)	(98.2)	(49.3)	(137.1)
Other comprehensive income (loss) before reclassification adjustments	91.8	(58.1)	16	(19.2)
Gain reclassified from Accumulated other comprehensive loss	0	0	0	0
Loss reclassified related to divestitures			5.5
Tax impact	0	0	0	0
Other comprehensive income (loss), net of tax	91.8	(58.1)	21.5	(19.2)
Ending balance	(27.8)	(156.3)	(27.8)	(156.3)
Pension and Other Postretirement Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	3.2	10.4	3.5	10.9
Other comprehensive income (loss) before reclassification adjustments	0	0	0	0
Gain reclassified from Accumulated other comprehensive loss	(0.2)	(0.3)	(0.6)	(1)
Loss reclassified related to divestitures			0
Tax impact	0.1	0	0.2	0.2
Other comprehensive income (loss), net of tax	(0.1)	(0.3)	(0.4)	(0.8)
Ending balance	$ 3.1	$ 10.1	$ 3.1	$ 10.1

Share Repurchases (Details)

Share Repurchases (Details) - USD ($)			9 Months Ended
	Mar. 17, 2020	Dec. 01, 2015	Sep. 30, 2024	Sep. 30, 2023
Equity [Abstract]
Increase in share repurchase authorized amount	$ 500,000,000	$ 300,000,000
Repurchase of common stock (in shares)			0	5,400
Repurchase of shares of common stock				$ 1,100,000
Remaining authorized repurchase amount			$ 539,700,000

Share Based Compensation - Narr

Share Based Compensation - Narrative (Details) - USD ($) $ in Millions		1 Months Ended		9 Months Ended
	Jan. 31, 2024	Feb. 29, 2024	Jan. 31, 2024	Sep. 30, 2024	Dec. 31, 2023
Stock options expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option exercisable life				10 years
Total unrecognized compensation cost				$ 11
Weighted-average period of total unrecognized compensation cost, in years				1 year 4 months 24 days
Stock options expense | Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period				4 years
Restricted stock expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost				$ 18
Weighted-average period of total unrecognized compensation cost, in years				1 year 2 months 12 days
Granted (in shares)				102,915
Restricted stock expense | Employees and Non-employee Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period				3 years
Cash-settled restricted stock expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period				3 years
Total unrecognized compensation cost				$ 4.9
Weighted-average period of total unrecognized compensation cost, in years				1 year 1 month 6 days
Granted (in shares)				23,555
Cash-settled restricted stock expense | Accrued Expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, accrued expenses				$ 3.7	$ 4.2
Cash-settled restricted stock expense | Other Noncurrent Liabilities
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, accrued expenses				2.5	$ 2.9
Performance share units expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Total unrecognized compensation cost				$ 3.9
Weighted-average period of total unrecognized compensation cost, in years				1 year
Granted (in shares)	19,200			27,135
Payout percent			50%
Net issuance of shares of common stock (net of tax) (in shares)		9,606

Share-Based Compensation - Sche

Share-Based Compensation - Schedule of Weighted Average Option Fair Values and Assumptions (Details) - Stock options expense - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value of grants (in dollars per share)	$ 49.83	$ 56.47	$ 63.63	$ 60.49
Dividend yield	1.42%	1.20%	1.09%	1.07%
Volatility	26.47%	26.78%	26.66%	27.17%
Risk-free interest rate	4.08%	4.26%	4.31%	4.12%
Expected life (in years)	4 years 7 months 6 days	4 years 6 months	4 years 7 months 6 days	4 years 6 months

Share-Based Compensation - Stoc

Share-Based Compensation - Stock Options Activity (Details) - Stock options expense - USD ($) $ / shares in Units, $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Shares
Beginning balance (in shares)	983,267
Granted (in shares)	196,600
Exercised (in shares)	(79,005)
Forfeited (in shares)	(38,796)
Ending balance (in shares)	1,062,066	983,267
Vested and expected to vest (in shares)	1,025,776
Exercisable (in shares)	603,219
Weighted Average Exercise Price
Beginning balance (in dollars per share)	$ 178.86
Granted (in dollars per share)	234.59
Exercised (in dollars per share)	155.56
Forfeited (in dollars per share)	205.39
Ending balance (in dollars per share)	189.84	$ 178.86
Vested and expected to vest (in dollars per share)	188.79
Exercisable (in dollars per share)	$ 168.07
Weighted-Average Remaining Contractual Term (years)
Stock options outstanding, weighted-average remaining contractual term	6 years 9 months 10 days	6 years 10 months 17 days
Weighted-average remaining contractual term, vested and expected to vest	6 years 8 months 15 days
Weighted-average remaining contractual term, exercisable	5 years 5 months 19 days
Aggregate Intrinsic Value
Stock options outstanding, aggregate intrinsic value	$ 31.9	$ 39.3
Aggregate intrinsic value, vested and expected to vest	31.7
Aggregate intrinsic value, exercisable	$ 28.7

Share-Based Compensation - Rest

Share-Based Compensation - Restricted Stock Units Activity (Details) - Restricted stock expense	9 Months Ended
	Sep. 30, 2024 $ / shares shares
Shares
Unvested, beginning balance (in shares) | shares	112,891
Granted (in shares) | shares	102,915
Vested (in shares) | shares	(24,125)
Forfeited (in shares) | shares	(11,600)
Unvested, ending balance (in shares) | shares	180,081
Weighted-Average Grant Date Fair Value
Unvested, beginning balance (in dollars per share) | $ / shares	$ 193.03
Granted (in dollars per share) | $ / shares	211.55
Vested (in dollars per share) | $ / shares	201.52
Forfeited (in dollars per share) | $ / shares	210.94
Unvested, ending balance (in dollars per share) | $ / shares	$ 201.32

Share-Based Compensation - Cash

Share-Based Compensation - Cash-settled Restricted Stock Activity (Details) - Cash-settled restricted stock expense	9 Months Ended
	Sep. 30, 2024 $ / shares shares
Shares
Unvested, beginning balance (in shares) | shares	56,655
Granted (in shares) | shares	23,555
Vested (in shares) | shares	(15,275)
Forfeited (in shares) | shares	(5,430)
Unvested, ending balance (in shares) | shares	59,505
Weighted-Average Fair Value
Unvested, beginning balance (in dollars per share) | $ / shares	$ 217.11
Granted (in dollars per share) | $ / shares	229.87
Vested (in dollars per share) | $ / shares	235.39
Forfeited (in dollars per share) | $ / shares	214.50
Unvested, ending balance (in dollars per share) | $ / shares	$ 214.50

Share-Based Compensation - Sc_2

Share-Based Compensation - Schedule of Weighted Average Performance Share Units Fair Values and Assumptions (Details) - Performance share units expense - $ / shares	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value of grants (in dollars per share)	$ 349.59	$ 308.18
Dividend yield	0%	0%
Volatility	22.23%	27%
Risk-free interest rate	4.45%	4.37%
Expected life (in years)	2 years 11 months 8 days	2 years 11 months 8 days

Share-Based Compensation - Perf

Share-Based Compensation - Performance Share Unit Activity (Details) - Performance share units expense - $ / shares		9 Months Ended
	Jan. 31, 2024	Sep. 30, 2024
Shares
Unvested, beginning balance (in shares)		67,455
Granted (in shares)	19,200	27,135
Vested (in shares)		(9,606)
Forfeited (in shares)		(11,444)
Unvested, ending balance (in shares)		73,540
Weighted-Average Grant Date Fair Value
Unvested, beginning balance (in dollars per share)		$ 265.15
Granted (in dollars per share)		349.59
Vested (in dollars per share)		245.40
Forfeited (in dollars per share)		252.92
Unvested, ending balance (in dollars per share)		$ 300.35

Share-Based Compensation - Pre-

Share-Based Compensation - Pre-Tax Compensation Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total pre-tax share-based compensation expense	$ 5.2	$ 2.5	$ 23.7	$ 21.1
Income tax benefit	(0.7)	(0.5)	(2.3)	(2.1)
Total share-based compensation expense, net of income taxes	4.5	2	21.4	19
Stock options expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total pre-tax share-based compensation expense	1.5	1.1	8.4	8.7
Restricted stock expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total pre-tax share-based compensation expense	1.6	1.1	5.7	4.4
Cash-settled restricted stock expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total pre-tax share-based compensation expense	1.2	0.6	2.8	2.3
Performance share units expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total pre-tax share-based compensation expense	$ 0.9	(0.3)	$ 6.8	5.7
Executive forfeitures		$ 1.1		$ 1.1

Retirement Benefits - Component

Retirement Benefits - Components of Net Periodic Benefit Cost for Defined Benefit Plans and Other Postretirement Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pension Benefits | U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 0.1	$ 0.1	$ 0.1	$ 0.1
Interest cost	0.1	0.1	0.3	0.3
Expected return on plan assets	(0.1)	(0.1)	(0.2)	(0.2)
Net amortization	0	0	0.2	0.1
Net periodic cost	0.1	0.1	0.4	0.3
Pension Benefits | Non-U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0.3	0.3	1.1	0.9
Interest cost	0.6	0.6	1.9	2
Expected return on plan assets	(0.4)	(0.4)	(1.3)	(1.2)
Net amortization	0	(0.1)	(0.1)	(0.4)
Net periodic cost	0.5	0.4	1.6	1.3
Other Postretirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0.2	0.1	0.4	0.3
Interest cost	0.2	0.2	0.6	0.6
Net amortization	(0.2)	(0.2)	(0.7)	(0.7)
Net periodic cost	$ 0.2	$ 0.1	$ 0.3	$ 0.2

Retirement Benefits - Narrative

Retirement Benefits - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Defined Benefit Plan Disclosure [Line Items]
Contributions by employer	$ 3.5	$ 3.9
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Expected contribution for next fiscal year	3.6
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Expected contribution for next fiscal year	$ 1.1

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Income before income taxes	$ 154.4	$ 261.8	$ 488.1	$ 620.1
Provision for income taxes	$ 35.5	$ 52.8	$ 106.7	$ 132.8
Effective tax rate	22.90%	20.20%	21.90%	21.40%