Long-Term Incentive - Additional Information (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Mar. 04, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share available for future grant under stock option	35.9
Share-based Payment Arrangement, Exercise of Option, Tax Benefit	$ 7.7	$ 7.6	$ 4.5
Share-Based Payment Arrangement, Exercise of Option, Excess Tax Benefit	$ 1.9	$ 1.8	$ 0.9
Options Outstanding Number		0.1	0.1
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0.1	0.1	0.1
Cash received from the exercise of stock options	$ 1.0	$ 0.5	$ 0.6
ITT 2023 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Stock Ownership Plan (ESOP), Compensation Expense	0.0
Equity Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested options and restricted stock	$ 45.4
Unrecognized compensation cost weighted average amortization period (years)	1 year 10 months 24 days
Liability Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested options and restricted stock	$ 4.3
Unrecognized compensation cost weighted average amortization period (years)	1 year 9 months 18 days
Equity-settled PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total number of shares expected to vest	0.6
ROIC Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	1.05%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend	$ 1.404
Share Price				$ 134.24