CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS - USD ($) shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Revenue	$ 514,700,000	$ 719,900,000	$ 1,178,000,000.0	$ 1,415,400,000
Costs of revenue	351,100,000	487,900,000	805,000,000.0	964,600,000
Gross profit	163,600,000	232,000,000.0	373,000,000.0	450,800,000
General and administrative expenses	44,600,000	62,600,000	101,700,000	113,400,000
Sales and marketing expenses	35,700,000	42,700,000	77,300,000	82,900,000
Research and development expenses	18,900,000	25,800,000	41,600,000	49,300,000
Asbestos-related costs (benefit), net	16,000,000.0	11,800,000	(24,700,000)	24,400,000
Restructuring costs	27,900,000	3,100,000	31,000,000.0	4,200,000
Asset impairment charges	0	0	16,300,000	0
Operating income	20,500,000	86,000,000.0	129,800,000	176,600,000
Interest and non-operating expenses (income), net	2,200,000	(400,000)	2,800,000	(900,000)
Income from continuing operations before income tax expense	18,300,000	86,400,000	127,000,000.0	177,500,000
Income tax (benefit) expense	(28,100,000)	19,300,000	(3,400,000)	39,000,000.0
Income from continuing operations	46,400,000	67,100,000	130,400,000	138,500,000
Income from discontinued operations, net of tax	1,600,000	(100,000)	2,700,000	(100,000)
Net income	48,000,000.0	67,000,000.0	133,100,000	138,400,000
Less: Income attributable to noncontrolling interests	0	200,000	300,000	300,000
Net income attributable to ITT Inc.	48,000,000.0	66,800,000	132,800,000	138,100,000
Amounts attributable to ITT Inc.:
Income from continuing operations, net of tax	46,400,000	66,900,000	130,100,000	138,200,000
Income from discontinued operations, net of tax	1,600,000	(100,000)	2,700,000	(100,000)
Net income attributable to ITT Inc.	$ 48,000,000.0	$ 66,800,000	$ 132,800,000	$ 138,100,000
Basic:
Continuing operations	$ 0.54	$ 0.76	$ 1.50	$ 1.58
Discontinued operations	0.02	0	0.03	0
Net income	0.56	0.76	1.53	1.58
Diluted:
Continuing operations	0.53	0.75	1.49	1.56
Discontinued operations	0.02	0	0.03	0
Net income	$ 0.55	$ 0.75	$ 1.52	$ 1.56
Weighted average common shares – basic	86.3	87.8	87.0	87.7
Weighted average common shares – diluted	86.8	88.7	87.6	88.6