CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Income Statement [Abstract]
Revenue	$ 885.2	$ 822.1	$ 2,701.7	$ 2,453.9
Cost of revenue	571.2	542.7	1,770.8	1,632.6
Gross profit	314.0	279.4	930.9	821.3
General and administrative expenses	74.8	66.9	223.1	210.8
Sales and marketing expenses	50.5	44.4	151.2	131.2
Research and development expenses	28.6	25.0	88.3	77.1
Gain on sale of business	(47.8)	0.0	(47.8)	(7.2)
Operating income	207.9	143.1	516.1	409.4
Interest expense	10.0	4.2	25.1	15.4
Interest income	(1.6)	(1.9)	(5.0)	(6.5)
Other non-operating income, net	(0.2)	(0.9)	(1.9)	(1.5)
Income before income tax expense	199.7	141.7	497.9	402.0
Income tax expense	37.8	29.9	103.6	80.6
Income from continuing operations	161.9	111.8	394.3	321.4
Net income	161.7	111.8	394.1	321.4
Less: Income attributable to noncontrolling interests	0.6	1.0	2.8	2.4
Net income attributable to ITT Inc.	161.1	110.8	391.3	319.0
Amounts attributable to ITT Inc.:
Income from continuing operations	161.3	110.8	391.5	319.0
Loss from discontinued operations, net of tax	(0.2)	0.0	(0.2)	0.0
Net income attributable to ITT Inc.	$ 161.1	$ 110.8	$ 391.3	$ 319.0
Basic: [Abstract]
Continuing operations	$ 1.98	$ 1.35	$ 4.78	$ 3.87
Discontinued operations	(0.01)	0	0	0
Net income	1.97	1.35	4.78	3.87
Diluted: [Abstract]
Continuing operations	1.96	1.34	4.75	3.86
Discontinued operations	0	0	0	0
Net income	$ 1.96	$ 1.34	$ 4.75	$ 3.86
Weighted average common shares – basic	81.6	82.1	81.9	82.4
Weighted average common shares – diluted	82.1	82.5	82.4	82.7