Collaborative Investments	9 Months Ended
	Sep. 30, 2023
Equity Method Investments and Joint Ventures [Abstract]
Collaborative Investments	Collaborative InvestmentsDuring 2021 and 2022, a subsidiary of IDEX funded a total of $7.2 million in promissory notes as an investment in a start-up company that provides communication technology to improve individual performance and team coordination for firefighters’ responses, which aligns with IDEX’s Fire & Safety/Diversified Products (“FSDP”) segment’s strategic plan. On a quarterly basis, the Company evaluates whether an allowance for credit losses is required for these promissory notes and measures the allowance using the current expected credit loss model. While the Company continues to retain certain convertible equity rights as well as a secured interest in the intellectual property of the start-up company, during the second quarter of 2023, IDEX concluded it would not provide additional funding to the start-up at that time. As a result of the Company’s analysis of the recoverability of its investment during the second quarter of 2023, IDEX determined that its investment may no longer be recoverable. As a result, IDEX recorded a credit loss of $7.7 million in Other expense (income) - net in the Condensed Consolidated Statements of Income and a reserve in Other noncurrent assets on the Condensed Consolidated Balance Sheets for the full amount of the principal and accrued interest outstanding.