Consolidated Statements of Operations and Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 26, 2015	Dec. 31, 2016	Dec. 26, 2015
Income Statement [Abstract]
Net sales	$ 1,309.8	$ 1,341.6	$ 3,316.5	$ 3,375.7
Licensing revenue	43.0	55.8	112.4	137.7
Total revenue	1,352.8	1,397.4	3,428.9	3,513.4
Cost of goods sold	547.1	565.5	1,387.2	1,413.4
Gross profit	805.7	831.9	2,041.7	2,100.0
Selling, general and administrative expenses	407.6	377.6	1,141.3	1,036.3
Depreciation and amortization	55.7	45.0	162.5	132.7
Impairment of long-lived assets	0.5	0.0	5.4	0.0
Total operating expenses	463.8	422.6	1,309.2	1,169.0
Income from operations	341.9	409.3	732.5	931.0
Other (income) expense, net	(4.1)	(0.1)	(4.7)	0.8
Interest expense, net	3.4	0.6	5.1	1.1
Foreign currency loss	0.9	0.2	2.2	2.3
Income before provision for income taxes	341.7	408.6	729.9	926.8
Provision for income taxes	70.4	114.4	151.6	265.4
Net income	271.3	294.2	578.3	661.4
Less: Net loss attributable to noncontrolling interest	0.0	(0.4)	(1.0)	(0.7)
Net income attributable to MKHL	$ 271.3	$ 294.6	$ 579.3	$ 662.1
Weighted average ordinary shares outstanding:
Weighted average ordinary shares outstanding, basic (in shares)	163,148,597	182,176,452	168,000,933	189,336,957
Weighted average ordinary shares outstanding, diluted (in shares)	165,214,045	184,851,616	170,222,588	192,143,422
Net income per ordinary share attributable to MKHL:
Net income per ordinary share, basic (in dollars per share)	$ 1.66	$ 1.62	$ 3.45	$ 3.50
Net income per ordinary share, diluted (in dollars per share)	$ 1.64	$ 1.59	$ 3.40	$ 3.45
Statements of Comprehensive Income:
Net income	$ 271.3	$ 294.2	$ 578.3	$ 661.4
Foreign currency translation adjustments	(20.1)	(12.0)	(20.8)	(7.8)
Net gain (loss) on derivatives	9.4	(4.7)	11.2	(23.3)
Comprehensive income	260.6	277.5	568.7	630.3
Less: Net loss attributable to noncontrolling interest	0.0	(0.4)	(1.0)	(0.7)
Less: Other comprehensive loss attributable to noncontrolling interest	(0.4)	0.0	(0.4)	0.0
Comprehensive income attributable to MKHL	$ 261.0	$ 277.9	$ 570.1	$ 631.0