CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS - USD ($) shares in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Revenue	$ 698,400,000	$ 663,300,000
Costs of revenue	469,400,000	453,900,000
Gross profit	229,000,000.0	209,400,000
General and administrative expenses	52,100,000	57,100,000
Sales and marketing expenses	36,700,000	41,600,000
Research and development expenses	24,300,000	22,700,000
Asbestos-related costs (benefit), net	2,400,000	(40,700,000)
Restructuring costs	3,600,000	3,100,000
Asset impairment charges	0	16,300,000
Operating income	109,900,000	109,300,000
Interest and non-operating (income) expenses, net	(1,300,000)	600,000
Income from continuing operations before income tax expense	111,200,000	108,700,000
Income tax expense	24,700,000	24,700,000
Income from continuing operations	86,500,000	84,000,000.0
Income from discontinued operations, net of tax	0	1,100,000
Net income	86,500,000	85,100,000
Less: Income attributable to noncontrolling interests	300,000	300,000
Net income attributable to ITT Inc.	86,200,000	84,800,000
Amounts attributable to ITT Inc.:
Income from continuing operations, net of tax	86,200,000	83,700,000
Income from discontinued operations, net of tax	0	1,100,000
Net income attributable to ITT Inc.	$ 86,200,000	$ 84,800,000
Basic earnings per share:
Continuing operations	$ 1.00	$ 0.96
Discontinued operations	0	0.01
Net income	1.00	0.97
Diluted earnings per share:
Continuing operations	0.99	0.95
Discontinued operations	0	0.01
Net income	$ 0.99	$ 0.96
Weighted average common shares – basic	86.3	87.4
Weighted average common shares – diluted	86.9	88.2