CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 33.0	$ 142.4	$ 70.3	$ 184.4
Other comprehensive (loss) income:
Net foreign currency translation adjustment	(14.4)	13.1	12.8	(47.8)
Net change in postretirement benefit plans, net of tax impacts of $0.5, $0.1, $1.1 and $0.4, respectively	1.2	0.6	2.3	1.1
Other comprehensive (loss) income	(13.2)	13.7	15.1	(46.7)
Comprehensive income	19.8	156.1	85.4	137.7
Less: Comprehensive income attributable to noncontrolling interests	0.2	0.1	0.1	0.0
Comprehensive income attributable to ITT Inc.	19.6	156.0	85.3	137.7
Reclassification adjustments (see Note 14):
Amortization of prior service benefit, net of tax expense of $(0.5), $(0.9), $(1.0) and $(1.8), respectively	(0.9)	(1.6)	(1.8)	(3.2)
Amortization of net actuarial loss, net of tax benefits of $1.0, $1.0, $2.1 and $2.2, respectively	2.1	2.2	4.1	4.3
Net change in postretirement benefit plans, net of tax impacts of $0.5, $0.1, $1.1 and $0.4, respectively	$ 1.2	$ 0.6	$ 2.3	$ 1.1