CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 29, 2025	Mar. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 109.1	$ 112.5
Other comprehensive income (loss):
Net foreign currency translation adjustment	27.3	(32.1)
Net change in postretirement benefit plans, net of tax impacts of $0.3 and $0.3, respectively	(1.2)	(1.0)
Other comprehensive income (loss)	26.1	(33.1)
Comprehensive income	135.2	79.4
Less: Comprehensive income attributable to noncontrolling interests	0.7	1.0
Comprehensive income attributable to ITT Inc.	134.5	78.4
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract]
Amortization of prior service benefit, net of tax expense of $0.3 and $0.3, respectively	(1.1)	(1.1)
Amortization of net actuarial loss, net of tax benefit of $0.0 and $0.0, respectively	(0.1)	0.1
Net change in postretirement benefit plans, net of tax	$ 1.2	$ 1.0