CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]
Consolidated net income	$ 45.2	$ 43.8	$ 86.3	$ 79.4
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(54.5)	13.1	(39.1)	26.1
Pension and postretirement plan adjustments	1.9	1.3	3.7	2.5
Unrealized gains (losses) on derivatives	(1.3)	(0.4)	0.3	(0.3)
Total other comprehensive income (loss), net of tax	(53.9)	14.0	(35.1)	28.3
Total comprehensive income (loss) including non-controlling interests	(8.7)	57.8	51.2	107.7
Comprehensive income (loss) attributable to non-controlling interests	0.5	(1.2)	(1.3)	(2.7)
Comprehensive income (loss) attributable to MTI	$ (8.2)	$ 56.6	$ 49.9	$ 105.0