CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Revenue	$ 2,987.7	$ 2,765.0	$ 2,477.8
Costs of revenue	2,065.4	1,865.5	1,695.6
Gross profit	922.3	899.5	782.2
General and administrative expenses	211.6	221.3	200.7
Sales and marketing expenses	156.9	150.8	146.5
Research and development expenses	96.5	94.9	84.9
Gain on sale of long-lived assets	(16.3)	(7.0)	(2.0)
Asbestos-related (benefit) costs, net	0.0	(74.4)	66.3
Restructuring costs	3.8	9.6	43.0
Asset impairment charges	1.8	0.0	16.3
Operating income	468.0	504.3	226.5
Interest expense (income), net	6.4	(1.1)	(0.7)
Non-operating postretirement costs (benefit), net	1.1	(1.3)	144.2
Miscellaneous income, net	(1.3)	(2.4)	(2.2)
Income from continuing operations before income tax	461.8	509.1	85.2
Income tax expense	91.1	189.6	15.3
Income from continuing operations	370.7	319.5	69.9
(Loss) income from discontinued operations, net of tax benefit (expense) of $0.4, $0.2, and $(0.2), respectively	(1.3)	1.5	4.0
Net income	369.4	321.0	73.9
Less: Income attributable to noncontrolling interests	2.4	4.7	1.4
Net income attributable to ITT Inc.	367.0	316.3	72.5
Amounts attributable to ITT Inc.:
Income from continuing operations, net of tax	368.3	314.8	68.5
(Loss) income from discontinued operations, net of tax	(1.3)	1.5	4.0
Net income attributable to ITT Inc.	$ 367.0	$ 316.3	$ 72.5
Basic:
Continuing operations	$ 4.42	$ 3.66	$ 0.79
Discontinued operations	(0.02)	0.02	0.05
Net income	4.40	3.68	0.84
Diluted:
Continuing operations	4.40	3.64	0.78
Discontinued operations	(0.02)	0.02	0.05
Net income	$ 4.38	$ 3.66	$ 0.83
Weighted average common shares – basic	83.4	86.0	86.7
Weighted average common shares – diluted	83.7	86.5	87.3