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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 |  |  |

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