CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Apr. 02, 2022	Apr. 03, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 75.3	$ 86.5
Other comprehensive (loss):
Net foreign currency translation adjustment	(11.7)	(30.0)
Net change in postretirement benefit plans, net of tax expense of $(0.2) and $(0.1), respectively	(0.3)	0.0
Other comprehensive (loss)	(12.0)	(30.0)
Comprehensive income	63.3	56.5
Less: Comprehensive income attributable to noncontrolling interests	0.5	0.3
Comprehensive income attributable to ITT Inc.	62.8	56.2
Reclassification adjustments:
Amortization of prior service benefit, net of tax expense of $(0.3) and $(0.3), respectively	(1.0)	(1.0)
Amortization of net actuarial loss, net of tax benefit of $0.1 and $0.2, respectively	0.7	1.0
Net change in postretirement benefit plans, net of tax	$ 0.3	$ 0.0