Long-Term Incentive - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Mar. 04, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share available for future grant under stock option	36,500,000
Share Price				$ 93.83
Options Outstanding Number		100,000	100,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	100,000	100,000	100,000
Cash received from the exercise of stock options	$ 0.6	$ 1.8	$ 1.2
Share-based Payment Arrangement, Exercise of Option, Tax Benefit	$ 0.9	$ 2.4	$ 3.2
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 (2023 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.
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	$ 25.0
Unrecognized compensation cost weighted average amortization period (years)	1 year 9 months 18 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	$ 2.4
Unrecognized compensation cost weighted average amortization period (years)	1 year 10 months 24 days
Equity-settled PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total number of shares expected to vest	400,000
ROIC Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	1.24%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend	$ 1.16
Share Price				$ 93.83
Out of the Money Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding Number	0