CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 02, 2022	Jul. 03, 2021	Jul. 02, 2022	Jul. 03, 2021
Income Statement [Abstract]
Revenue	$ 733.3	$ 691.6	$ 1,459.5	$ 1,390.0
Cost of revenue	511.1	467.0	1,018.9	936.4
Gross profit	222.2	224.6	440.6	453.6
General and administrative expenses	57.0	60.3	117.4	116.0
Sales and marketing expenses	40.4	38.3	78.8	75.0
Research and development expenses	24.3	23.2	49.3	47.5
Asbestos-related benefit, net	0.0	(76.8)	0.0	(74.4)
Operating income	100.5	179.6	195.1	289.5
Interest and non-operating expense (income), net	0.5	(3.5)	0.3	(4.8)
Income from continuing operations before income tax expense	100.0	183.1	194.8	294.3
Income tax expense	24.0	143.9	43.5	168.6
Income from continuing operations	76.0	39.2	151.3	125.7
Loss from discontinued operations, net of tax benefit of $0.4, $0.0, $0.4, and $0.0, respectively	(1.2)	0.0	(1.2)	0.0
Net income	74.8	39.2	150.1	125.7
Less: Income attributable to noncontrolling interests	0.2	0.2	0.7	0.5
Net income attributable to ITT Inc.	74.6	39.0	149.4	125.2
Amounts attributable to ITT Inc.: [Abstract]
Income from continuing operations	75.8	39.0	150.6	125.2
Loss from discontinued operations, net of tax	(1.2)	0.0	(1.2)	0.0
Net income attributable to ITT Inc.	$ 74.6	$ 39.0	$ 149.4	$ 125.2
Basic:
Continuing operations	$ 0.91	$ 0.45	$ 1.79	$ 1.45
Discontinued operations	(0.01)	0	(0.01)	0
Net income	0.90	0.45	1.78	1.45
Diluted:
Continuing operations	0.91	0.45	1.79	1.44
Discontinued operations	(0.02)	0	(0.02)	0
Net income	$ 0.89	$ 0.45	$ 1.77	$ 1.44
Weighted average common shares – basic	83.1	86.1	84.0	86.2
Weighted average common shares – diluted	83.4	86.5	84.3	86.7