Earnings Per Share (EPS) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
Apr. 02, 2017	Apr. 03, 2016
Earnings Per Share (EPS) [Abstract]
Net income attributable to MTI	$ 34.6	$ 33.9
Weighted average shares outstanding (in shares)	35,000,000	34,800,000
Dilutive effect of stock options and stock units (in shares)	600,000	100,000
Weighted average shares outstanding, adjusted (in shares)	35,600,000	34,900,000
Basic earnings (Loss) per share attributable to MTI (in dollars per share)	$ 0.99	$ 0.97
Diluted earnings (Loss) per share attributable to MTI (in dollars per share)	$ 0.97	$ 0.97
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities not included in the weighted average commons shares outstanding calculation (in shares)	185,104	375,644

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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