Acquisitions - kSARIA (Details) $ in Millions	4 Months Ended	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2025 USD ($)		Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Sep. 12, 2024 USD ($) Employees
Business Combination [Line Items]
Goodwill(a)	$ 1,430.1	$ 1,511.2		$ 1,430.1	$ 1,016.3
Net assets acquired		6.8		864.8	$ 79.3
Goodwill, Measurement Period Adjustment		(0.8)		0.6
kSARIA
Business Combination [Line Items]
Receivables	26.7	26.4		26.7
Inventory	48.0	38.4		48.0
Plant, property and equipment	9.4	9.1		9.4
Goodwill(a)	244.3	243.5	[1]	244.3
Other intangible assets	185.1	185.1		185.1
Other assets	10.3	10.0		10.3
Accounts payable and accrued liabilities	(28.5)	(30.5)		(28.5)
Other liabilities	(30.5)	(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)
Goodwill, Measurement Period Adjustment		(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)
Business Combination, Contingent Consideration, Liability						$ 4.5
Entity Number of Employees | Employees						1,000

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