CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020
Income Statement [Abstract]
Revenue	$ 691.6	$ 514.7	$ 1,390.0	$ 1,178.0
Costs of revenue	467.0	351.1	936.4	805.0
Gross profit	224.6	163.6	453.6	373.0
General and administrative expenses	60.2	44.6	112.3	101.7
Sales and marketing expenses	38.3	35.7	75.0	77.3
Research and development expenses	23.2	18.9	47.5	41.6
Asbestos-related (benefit) costs, net	(76.8)	16.0	(74.4)	(24.7)
Restructuring costs	0.1	27.9	3.7	31.0
Asset impairment charges	0.0	0.0	0.0	16.3
Operating income	179.6	20.5	289.5	129.8
Interest and non-operating (income) expenses, net	(3.5)	2.2	(4.8)	2.8
Income from continuing operations before income tax expense	183.1	18.3	294.3	127.0
Income tax expense (benefit)	143.9	(28.1)	168.6	(3.4)
Income from continuing operations	39.2	46.4	125.7	130.4
Income from discontinued operations, net of tax	0.0	1.6	0.0	2.7
Net income	39.2	48.0	125.7	133.1
Less: Income attributable to noncontrolling interests	0.2	0.0	0.5	0.3
Net income attributable to ITT Inc.	39.0	48.0	125.2	132.8
Amounts attributable to ITT Inc.:
Income from continuing operations, net of tax	39.0	46.4	125.2	130.1
Income from discontinued operations, net of tax	0.0	1.6	0.0	2.7
Net income attributable to ITT Inc.	$ 39.0	$ 48.0	$ 125.2	$ 132.8
Basic earnings per share:
Continuing operations	$ 0.45	$ 0.54	$ 1.45	$ 1.50
Discontinued operations	0	0.02	0	0.03
Net income	0.45	0.56	1.45	1.53
Diluted earnings per share:
Continuing operations	0.45	0.53	1.44	1.49
Discontinued operations	0	0.02	0	0.03
Net income	$ 0.45	$ 0.55	$ 1.44	$ 1.52
Weighted average common shares – basic	86.1	86.3	86.2	87.0
Weighted average common shares – diluted	86.5	86.8	86.7	87.6