CAPITAL STOCK Net Settlement of LTIP (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended
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

Shares repurchased aggregate value under settlement of employee tax withholding obligations.

No definition available.

Name:	itt_SharesRepurchasedAggregateValueUnderSettlementOfEmployeeTaxWithholdingObligations
Namespace Prefix:	itt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration