CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Revenue	$ 2,846.4	$ 2,745.1	$ 2,585.3
Costs of revenue	1,936.3	1,857.9	1,765.4
Gross profit	910.1	887.2	819.9
General and administrative expenses	254.1	259.1	258.4
Sales and marketing expenses	165.9	168.2	169.5
Research and development expenses	97.9	98.4	93.5
Loss (gain) on sale or disposal of long-lived assets	1.0	(40.7)	(0.9)
Asbestos-related (benefit) cost, net	(20.2)	4.9	(19.9)
Operating income	411.4	397.3	319.3
Interest and non-operating (income) expenses, net	(3.0)	6.3	9.9
Income from continuing operations before income tax	414.4	391.0	309.4
Income tax expense	89.9	57.7	194.6
Income from continuing operations	324.5	333.3	114.8
Income (loss) from discontinued operations, including tax benefit (expense) of $0.6, $(0.3), and $1.9, respectively	1.7	1.3	(1.5)
Net income	326.2	334.6	113.3
Less: Income (loss) attributable to noncontrolling interests	1.1	0.9	(0.2)
Net income attributable to ITT Inc.	325.1	333.7	113.5
Amounts attributable to ITT Inc.:
Income from continuing operations, net of tax	323.4	332.4	115.0
Net income attributable to ITT Inc.	$ 325.1	$ 333.7	$ 113.5
Basic earnings per share:
Continuing operations	$ 3.69	$ 3.79	$ 1.30
Discontinued operations	0.02	0.02	(0.01)
Net income	3.71	3.81	1.29
Diluted earnings per share:
Continuing operations	3.65	3.75	1.29
Discontinued operations	0.02	0.01	(0.01)
Net income	$ 3.67	$ 3.76	$ 1.28
Weighted average common shares – basic	87.7	87.7	88.3
Weighted average common shares – diluted	88.6	88.7	89.0