CONSOLIDATED CONDENSED INCOME STATEMENTS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenue	$ 645.0	$ 581.7	$ 1,901.7	$ 1,817.0
Costs of revenue	441.9	397.8	1,291.9	1,232.2
Gross profit	203.1	183.9	609.8	584.8
General and administrative expenses	73.7	59.2	205.2	202.2
Sales and marketing expenses	41.3	39.4	128.3	128.7
Research and development expenses	23.1	18.6	68.2	58.9
Asbestos-related benefit, net	(62.8)	(68.1)	(33.0)	(40.3)
Operating income	127.8	134.8	241.1	235.3
Interest and non-operating expenses, net	0.2	0.3	0.1	1.5
Income from continuing operations before income tax expense	127.6	134.5	241.0	233.8
Income tax expense	40.6	46.1	60.3	75.3
Income from continuing operations	87.0	88.4	180.7	158.5
(Loss) income from discontinued operations, net of tax	(0.1)	1.8	(0.3)	2.0
Net income	86.9	90.2	180.4	160.5
Less: Income (loss) attributable to noncontrolling interests	0.0	0.1	(0.3)	0.2
Net income attributable to ITT Inc.	86.9	90.1	180.7	160.3
Amounts attributable to ITT Inc.:
Income from continuing operations, net of tax	87.0	88.3	181.0	158.3
(Loss) income from discontinued operations, net of tax	(0.1)	1.8	(0.3)	2.0
Net income attributable to ITT Inc.	$ 86.9	$ 90.1	$ 180.7	$ 160.3
Basic:
Continuing operations	$ 0.99	$ 0.99	$ 2.05	$ 1.77
Discontinued operations	0.00	0.02	0.00	0.02
Net income	0.99	1.01	2.05	1.79
Diluted:
Continuing operations	0.98	0.98	2.03	1.76
Discontinued operations	0.00	0.02	0.00	0.02
Net income	$ 0.98	$ 1.00	$ 2.03	$ 1.78
Weighted average common shares – basic	88.0	89.2	88.3	89.5
Weighted average common shares – diluted	88.7	89.7	89.0	90.2
Cash dividends declared per common share	$ 0.128	$ 0.124	$ 0.384	$ 0.372