CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Oct. 01, 2022	Sep. 30, 2023	Oct. 01, 2022
Income Statement [Abstract]
Revenue	$ 822.1	$ 753.6	$ 2,453.9	$ 2,213.1
Cost of revenue	542.7	520.2	1,632.6	1,539.1
Gross profit	279.4	233.4	821.3	674.0
General and administrative expenses	66.9	47.5	203.6	164.9
Sales and marketing expenses	44.4	39.5	131.2	118.3
Research and development expenses	25.0	24.4	77.1	73.7
Operating income	143.1	122.0	409.4	317.1
Interest and non-operating expense, net	1.4	2.3	7.4	2.6
Income from continuing operations before income tax expense	141.7	119.7	402.0	314.5
Income tax expense	29.9	16.4	80.6	59.9
Income from continuing operations	111.8	103.3	321.4	254.6
Loss from discontinued operations, net of tax benefit of $0.0, $(0.1), $0.0, and $0.3, respectively	0.0	(0.1)	0.0	(1.3)
Net income	111.8	103.2	321.4	253.3
Less: Income attributable to noncontrolling interests	1.0	0.8	2.4	1.5
Net income attributable to ITT Inc.	110.8	102.4	319.0	251.8
Amounts attributable to ITT Inc.:
Income from continuing operations	110.8	102.5	319.0	253.1
Loss from discontinued operations, net of tax	0.0	(0.1)	0.0	(1.3)
Net income attributable to ITT Inc.	$ 110.8	$ 102.4	$ 319.0	$ 251.8
Basic:
Continuing operations	$ 1.35	$ 1.24	$ 3.87	$ 3.03
Discontinued operations	0	0	0	(0.02)
Earnings Per Share, Basic, Total	1.35	1.24	3.87	3.01
Diluted:
Continuing operations	1.34	1.23	3.86	3.02
Discontinued operations	0	0	0	(0.02)
Earnings Per Share, Diluted, Total	$ 1.34	$ 1.23	$ 3.86	$ 3.00
Weighted average common shares – basic	82.1	82.7	82.4	83.6
Weighted average common shares – diluted	82.5	83.0	82.7	83.9