Long-Term Incentive - ESPP (Details) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Activity from stock incentive plans (in shares)	1.0
ITT 2023 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Stock Ownership Plan (ESOP), Plan Description	We sponsor the ITT Inc. 2023 Employee Stock Purchase Plan (the "ESPP"), pursuant to which eligible employees may elect to contribute from 1% to 10% of their eligible compensation, which includes after-tax base salary and annual bonus, subject to certain income limits, to purchase shares of ITT's common stock.
Employee Stock Ownership Plan (ESOP), Shares in ESOP	0.5
Employee Stock Ownership Plan (ESOP), Compensation Expense | $	$ 0.0