Accumulated Other Comprehensive Income (Loss) - Changes in Components of Accumulated Other Comprehensive Loss, Net of Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Apr. 02, 2016
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 1,595.0	$ 1,999.5	$ 2,241.0
Other comprehensive income (loss), net of tax	131.2	(0.1)	(14.0)
Ending balance	2,021.5	1,595.0	1,999.5
Other comprehensive income (loss) before reclassifications related to derivative instruments, tax provision (benefit)	(2.8)	1.2	(2.6)
Reclassification from other comprehensive income, tax provision	(0.6)		1.0
Foreign currency translation adjustments	147.4	(8.8)	18.5
Foreign Currency Translation (Losses) Gains
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(86.1)	(77.7)	(96.1)
Other comprehensive (loss) income before reclassifications	147.3	(8.4)	18.4
Less: amounts reclassified from AOCI to earnings	0.0	0.0	0.0
Other comprehensive income (loss), net of tax	147.3	(8.4)	18.4
Ending balance	61.2	(86.1)	(77.7)
Net gains (losses) on long-term transactions	(9.2)	2.4
Net Gains (Losses) on Derivatives
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	5.5	(3.2)	29.3
Other comprehensive (loss) income before reclassifications	(19.6)	9.0	(22.6)
Less: amounts reclassified from AOCI to earnings	(3.4)	0.3	9.9
Other comprehensive income (loss), net of tax	(16.2)	8.7	(32.5)
Ending balance	(10.7)	5.5	(3.2)
Accumulated other comprehensive income, tax provision (benefit)	(1.4)	0.8	(0.3)
Other Comprehensive (Loss)/Gain Attributable to MKHL
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(80.6)	(80.9)	(66.8)
Other comprehensive (loss) income before reclassifications	127.7	0.6	(4.2)
Less: amounts reclassified from AOCI to earnings	(3.4)	0.3	9.9
Other comprehensive income (loss), net of tax	131.1	0.3	(14.1)
Ending balance	50.5	(80.6)	(80.9)
Other Comprehensive Income (Loss) Attributable to Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(0.3)	0.1	0.0
Other comprehensive (loss) income before reclassifications	0.1	(0.4)	0.1
Less: amounts reclassified from AOCI to earnings	0.0	0.0	0.0
Other comprehensive income (loss), net of tax	0.1	(0.4)	0.1
Ending balance	(0.2)	(0.3)	0.1
Total Other Comprehensive (Loss) Income
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(80.9)	(80.8)	(66.8)
Other comprehensive (loss) income before reclassifications	127.8	0.2	(4.1)
Less: amounts reclassified from AOCI to earnings	(3.4)	0.3	9.9
Other comprehensive income (loss), net of tax	131.2	(0.1)	(14.0)
Ending balance	50.3	$ (80.9)	$ (80.8)
Jimmy Cho PLC
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Foreign currency translation adjustments	$ 88.8