CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS - USD ($) shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Revenue	$ 591,200,000	$ 711,900,000	$ 1,769,200,000	$ 2,127,300,000
Costs of revenue	400,600,000	480,600,000	1,205,600,000	1,445,200,000
Gross profit	190,600,000	231,300,000	563,600,000	682,100,000
General and administrative expenses	47,100,000	61,900,000	148,800,000	175,300,000
Sales and marketing expenses	33,400,000	41,600,000	110,700,000	124,500,000
Research and development expenses	19,700,000	23,800,000	61,300,000	73,100,000
Asbestos-related costs (benefit), net	141,400,000	(56,200,000)	116,700,000	(31,800,000)
Restructuring costs	11,500,000	6,700,000	42,500,000	10,900,000
Asset impairment charges	0	1,000,000.0	16,300,000	1,000,000.0
Operating (loss) income	(62,500,000)	152,500,000	67,300,000	329,100,000
Interest and non-operating expenses (income), net	1,200,000	(400,000)	4,000,000.0	(1,300,000)
(Loss) income from continuing operations before income tax expense	(63,700,000)	152,900,000	63,300,000	330,400,000
Income tax (benefit) expense	(16,200,000)	34,100,000	(19,600,000)	73,100,000
(Loss) income from continuing operations	(47,500,000)	118,800,000	82,900,000	257,300,000
Income (loss) from discontinued operations, net of tax	1,200,000	(100,000)	3,900,000	(200,000)
Net (loss) income	(46,300,000)	118,700,000	86,800,000	257,100,000
Less: Income attributable to noncontrolling interests	500,000	100,000	800,000	400,000
Net income attributable to ITT Inc.	(46,800,000)	118,600,000	86,000,000.0	256,700,000
Amounts attributable to ITT Inc.:
(Loss) income from continuing operations, net of tax	(48,000,000.0)	118,700,000	82,100,000	256,900,000
Income (loss) from discontinued operations, net of tax	1,200,000	(100,000)	3,900,000	(200,000)
Net income attributable to ITT Inc.	$ (46,800,000)	$ 118,600,000	$ 86,000,000.0	$ 256,700,000
Basic:
Continuing operations	$ (0.55)	$ 1.35	$ 0.95	$ 2.93
Discontinued operations	0.01	0	0.04	0
Net (loss) income	(0.54)	1.35	0.99	2.93
Diluted:
Continuing operations	(0.55)	1.34	0.94	2.90
Discontinued operations	0.01	0	0.04	0
Net (loss) income	$ (0.54)	$ 1.34	$ 0.98	$ 2.90
Weighted average common shares – basic	86.4	87.8	86.8	87.7
Weighted average common shares – diluted	86.4	88.7	87.4	88.6