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Summary of Significant Accounting Policies - Components of Calculation of Basic Net Income Per Ordinary Share and Diluted Net Income Per Ordinary Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Jun. 30, 2018	Jul. 01, 2017
Numerator:
Net income attributable to MKHL	$ 186.4	$ 125.5
Denominator:
Basic weighted average shares (in shares)	149,502,101	154,486,898
Weighted average dilutive share equivalents:
Share options, restricted shares/units, and performance restricted share units (in shares)	2,897,554	2,384,620
Diluted weighted average shares (in shares)	152,399,655	156,871,518
Basic net income per share (in dollars per share)	$ 1.25	$ 0.81
Diluted net income per share (in dollars per share)	$ 1.22	$ 0.80

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