ACQUISITIONS Allocation of Purchase Price Table (Details) - USD ($) $ in Millions		9 Months Ended			13 Months Ended
	Sep. 12, 2024	Sep. 27, 2025		Sep. 28, 2024	Sep. 27, 2025		Dec. 31, 2024
Business Combination [Line Items]
Goodwill		$ 1,499.1			$ 1,499.1		$ 1,430.1
Net assets acquired		0.2		$ 864.8
Adjustments to purchase price allocations		(0.8)
kSARIA
Business Combination [Line Items]
Receivables		26.4			26.4		26.7
Inventory		38.4			38.4		48.0
Plant, property and equipment		9.1			9.1		9.4
Goodwill		243.5	[1]		243.5	[1]	244.3
Other intangible assets		185.1			185.1		185.1
Other assets		10.0			10.0		10.3
Accounts payable and accrued liabilities		(30.5)			(30.5)		(28.5)
Other liabilities		(18.9)			(18.9)		(30.5)
Contract liabilities		(3.0)			(3.0)		$ (3.0)
Net assets acquired	$ 461.8				$ 460.1
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Receivables		(0.3)
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory		(9.6)
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment		(0.3)
Adjustments to purchase price allocations		(0.8)
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles		0.0
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other assets		(0.3)
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts payable and accrued liabilities		2.0
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Liabilities		11.6
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Contract liabilities		0.0
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments Related to Previous Period		$ (1.7)

[1] Goodwill acquired with kSARIA is primarily attributable to the complementary nature of its product portfolio to ITT’s existing connectors portfolio and is not expected to be deductible for income tax purposes.