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		6 Months Ended
	Oct. 01, 2016	Sep. 26, 2015	Oct. 01, 2016	Sep. 26, 2015
Numerator:
Net income attributable to MKHL	$ 160.9	$ 193.1	$ 308.0	$ 367.5
Denominator:
Basic weighted average shares (in shares)	166,695,631	188,857,398	170,427,101	192,917,209
Weighted average dilutive share equivalents:
Share options, restricted shares/units, and performance restricted share units (in shares)	2,144,336	2,666,758	2,299,758	2,872,116
Diluted weighted average shares (in shares)	168,839,967	191,524,156	172,726,859	195,789,325
Basic net income per share (in dollars per share)	$ 0.97	$ 1.02	$ 1.81	$ 1.90
Diluted net income per share (in dollars per share)	$ 0.95	$ 1.01	$ 1.78	$ 1.88