CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 03, 2026	Sep. 27, 2025	Oct. 03, 2026	Sep. 27, 2025
Statement of Comprehensive Income [Abstract]
Net income	$ 124.5	$ 128.1	$ 290.4	$ 358.9
Other comprehensive (loss) income:
Net foreign currency translation adjustment	(89.4)	(2.3)	(141.5)	105.0
Net change in postretirement benefit plans, net of tax impacts of $0.1, $0.1, $0.5, and $0.8, respectively	(0.4)	(0.4)	(2.0)	(2.7)
Other comprehensive (loss) income	(89.8)	(2.7)	(143.5)	102.3
Comprehensive income	34.7	125.4	146.9	461.2
Less: Comprehensive income attributable to noncontrolling interests	0.9	1.2	4.0	2.6
Comprehensive income attributable to ITT Inc.	33.8	124.2	142.9	458.6
Disclosure of reclassification adjustments to postretirement benefit plans:
Amortization of prior service benefit, net of tax expense of $0.2, $0.3, $0.6, and $1.0 respectively	(0.7)	(1.1)	(2.1)	(3.3)
Amortization of net actuarial loss, net of tax benefit of $0.0, $(0.1), $0.1, and $(0.1), respectively	(0.1)	(0.2)	(0.3)	(0.3)
Net actuarial gain, net of tax expense of $(0.1), $(0.3), $(0.1), and $(0.3), respectively	0.4	0.9	0.4	0.9
Net change in postretirement benefit plans, net of tax	$ 0.4	$ 0.4	$ 2.0	$ 2.7