Restructuring Expenses and Asset Impairments - Schedule of Pre-Tax Restructuring Expenses by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Restructuring Cost and Reserve [Line Items]
Restructuring expenses and asset impairments	$ 0.1	$ 3.0	$ 18.3	$ 5.4
Operating segments \| HST
Restructuring Cost and Reserve [Line Items]
Restructuring expenses and asset impairments	0.0		12.1
Operating segments \| FMT
Restructuring Cost and Reserve [Line Items]
Restructuring expenses and asset impairments	0.1		4.3
Operating segments \| Fire & Safety/Diversified Products
Restructuring Cost and Reserve [Line Items]
Restructuring expenses and asset impairments	0.0		1.6
Corporate/Other
Restructuring Cost and Reserve [Line Items]
Restructuring expenses and asset impairments	$ 0.0		$ 0.3

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details

IDEX CORP /DE/ 10-Q