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Subsequent Event	9 Months Ended
	Sep. 30, 2025
Subsequent Events [Abstract]
Subsequent Event	Subsequent Events Acquisitions EnPro Holdings acquired Overlook Industries, Inc. ("Overlook Industries") and entered into an agreement to acquire AlpHa Measurement Holdings, LLC ("AlpHa") on October 8, 2025 and October 10, 2025, respectively, for an aggregate of approximately $280 million in cash, subject to customary purchase price adjustments related to the final acquisition date net working capital determinations. We have funded, and plan to fund, these acquisitions with available cash on hand in the United States and borrowings under our Revolving Credit Facility. Overlook Industries, headquartered in Easthampton, Massachusetts, specializes in the design and fabrication of single-use technologies and other critical componentry for biopharmaceutical production processes. AlpHa is a Houston, Texas-based leading provider of liquid analytical sensing technologies and instrumentation for the measurement of key parameters for liquid processes. The company serves customers across a diverse set of end-markets, including industrial process control, water and wastewater, laboratory, and environmental monitoring. The acquisition of AlpHa is expected to close in November 2025, subject to customary closing conditions, including regulatory approvals. Pension Termination In October 2025, we entered into an agreement to settle and terminate our remaining defined benefit pension plan in the United States. The termination and settlement for this plan preserved retirement benefits due to participants but changed the ultimate payor of such benefits to a third-party insurer. We anticipate that assets in the pension plan will fully cover the settlement of the pension liabilities and that Enpro will not have any cash payment obligations related to the termination of the plan. At September 30, 2025, there were approximately $77 million of pre-tax losses related to this pension plan included in accumulated other comprehensive loss on our consolidated balance sheet. These pre-tax losses will be recognized in the fourth quarter of 2025.

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- Definition

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/855/tableOfContent

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

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