CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 27, 2025	Sep. 28, 2024
Income Statement [Abstract]
Revenue	$ 999.1	$ 885.2	$ 2,884.5	$ 2,701.7
Cost of revenue	643.9	570.5	1,866.2	1,768.7
Gross profit	355.2	314.7	1,018.3	933.0
General and administrative expenses	89.8	74.8	260.8	223.1
Sales and marketing expenses	57.5	50.5	167.7	151.2
Research and development expenses	28.1	28.6	84.0	88.3
Gain on sale of business	0.0	(47.8)	0.0	(47.8)
Operating income	179.8	208.6	505.8	518.2
Interest expense	11.7	10.0	33.6	25.1
Interest income	(1.5)	(1.6)	(5.6)	(5.0)
Other non-operating expense (income), net	(2.9)	(0.2)	(3.2)	(1.9)
Income before income tax expense	172.5	200.4	481.0	500.0
Income tax expense	44.3	38.0	122.0	104.1
Income from continuing operations	128.2	162.4	359.0	395.9
Loss from discontinued operations, net of tax benefit of $0.0, $0.0, $0.0, and $0.0, respectively	(0.1)	(0.2)	(0.1)	(0.2)
Net income	128.1	162.2	358.9	395.7
Less: Income attributable to noncontrolling interests	1.2	0.6	2.6	2.8
Net income attributable to ITT Inc.	126.9	161.6	356.3	392.9
Amounts attributable to ITT Inc.:
Income from continuing operations	127.0	161.8	356.4	393.1
Loss from discontinued operations, net of tax	(0.1)	(0.2)	(0.1)	(0.2)
Net income attributable to ITT Inc.	$ 126.9	$ 161.6	$ 356.3	$ 392.9
Earnings per share attributable to ITT Inc.:
Basic	$ 1.63	$ 1.98	$ 4.49	$ 4.80
Diluted	$ 1.62	$ 1.97	$ 4.46	$ 4.77
Weighted average common shares – basic	78.0	81.6	79.4	81.9
Weighted average common shares – diluted	78.4	82.1	79.8	82.4