CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 521.7	$ 413.8	$ 369.4
Other comprehensive income (loss):
Net foreign currency translation adjustment	(91.2)	17.6	(67.4)
Net change in postretirement benefit plans, net of tax impacts of $(1.5), $1.7, and $(7.6), respectively	4.8	(5.2)	44.4
Other comprehensive (loss) income	(86.4)	12.4	(23.0)
Comprehensive income	435.3	426.2	346.4
Less: Comprehensive income attributable to noncontrolling interests	3.4	3.3	2.4
Comprehensive income attributable to ITT Inc.	431.9	422.9	344.0
Disclosure of reclassification adjustments and other adjustments to postretirement benefit plans (See Note 15)
Amortization of prior service benefit, net of tax expense of $1.3, $1.4, and $1.3, respectively	(4.4)	(4.6)	(4.2)
Amortization of net actuarial loss, net of tax benefit of $0.1, $—, and $(0.5), respectively	0.4	0.1	2.6
Loss on plan settlement, net of tax benefit of $0.2, $—, and $—, respectively	0.7	0.0	0.0
Prior service (cost) benefit, net of tax benefit (expense) of $0.2, $—, and $(1.9), respectively	(0.3)	0.0	6.2
Net actuarial gain (loss), net of tax (expense) benefit of $(3.1), $0.3, and $(6.5), respectively	9.4	(0.5)	38.1
Unrealized change from foreign currency translation	0.4	(0.2)	1.7
Net change in postretirement benefit plans, net of tax	$ (4.8)	$ 5.2	$ (44.4)