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CAPITAL STOCK Net Settlement of LTIP (Details) - USD ($) shares in Millions, $ in Millions | 3 Months Ended
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Mar. 29, 2025 | Mar. 30, 2024
Equity [Abstract] |  |
Number of shares repurchased under settlement of employee tax withholding obligations | 0.1 | 0.1
Shares repurchased aggregate value under settlement of employee tax withholding obligations | $ 13.0 | $ 12.5

X
- Definition Number of shares repurchased under settlement of employee tax withholding obligations. + References No definition available. + Details
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Namespace Prefix: | itt_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Shares repurchased aggregate value under settlement of employee tax withholding obligations. + References No definition available. + Details
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Namespace Prefix: | itt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration