CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 45.6	$ 37.3
Other comprehensive income:
Net foreign currency translation adjustment	19.2	27.2
Net change in postretirement benefit plans, net of tax impacts of $0.5 and $0.6, respectively	1.1	1.1
Other comprehensive income	20.3	28.3
Comprehensive income	65.9	65.6
Less: Comprehensive loss attributable to noncontrolling interests	(0.4)	(0.1)
Comprehensive income attributable to ITT Inc.	66.3	65.7
Reclassification adjustments (see Note 14):
Amortization of prior service benefit, net of tax expense of $(0.5) and $(0.5), respectively	(0.7)	(0.9)
Amortization of net actuarial loss, net of tax benefits of $1.0 and $1.1, respectively	1.8	2.0
Net change in postretirement benefit plans, net of tax impacts of $0.5 and $0.6, respectively	$ 1.1	$ 1.1