Accumulated Other Comprehensive Income - Changes in Components of Accumulated Other Comprehensive Income, Net of Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 01, 2016	Sep. 26, 2015	Oct. 01, 2016	Sep. 26, 2015
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			$ 1,999.5
Other comprehensive income (loss), net of tax			1.1
Ending balance	$ 1,683.3		1,683.3
Less: other comprehensive income attributable to noncontrolling interest	(0.1)	$ 0.0	0.0	$ 0.0
Other comprehensive loss attributable to MKHL at October 1, 2016	(79.8)		(79.8)
Foreign Currency Translation (Losses) Gains
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(77.6)	(96.1)
Other comprehensive income (loss) before reclassifications			(0.7)	4.3
Less: net gains reclassified from AOCI to earnings			0.0	0.0
Other comprehensive income (loss), net of tax			(0.7)	4.3
Ending balance	(78.3)	(91.8)	(78.3)	(91.8)
Net Gains (Losses) on Derivatives
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(3.2)	29.3
Other comprehensive income (loss) before reclassifications			1.9	(16.4)
Less: net gains reclassified from AOCI to earnings			0.1	2.2
Other comprehensive income (loss), net of tax			1.8	(18.6)
Ending balance	(1.4)	10.7	(1.4)	10.7
Total Accumulated Other Comprehensive (Loss) Income
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(80.8)	(66.8)
Other comprehensive income (loss) before reclassifications			1.2	(12.1)
Less: net gains reclassified from AOCI to earnings			0.1	2.2
Other comprehensive income (loss), net of tax			1.1	(14.3)
Ending balance	(79.7)	$ (81.1)	(79.7)	$ (81.1)
Foreign Currency Translation (Losses) Gains Attributable to Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Less: other comprehensive income attributable to noncontrolling interest			0.1
Net Gains (Losses) on Derivatives Attributable to Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Less: other comprehensive income attributable to noncontrolling interest			0.0
Total Accumulated Other Comprehensive (Loss) Income Attributable to Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Less: other comprehensive income attributable to noncontrolling interest			0.1
Foreign Currency Translation (Losses) Gains Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Other comprehensive loss attributable to MKHL at October 1, 2016	(78.4)		(78.4)
Net Gains (Losses) on Derivatives Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Other comprehensive loss attributable to MKHL at October 1, 2016	(1.4)		(1.4)
Total Accumulated Other Comprehensive (Loss) Income Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(80.9)
Other comprehensive income (loss), net of tax			1.1
Ending balance	(79.8)		(79.8)
Other comprehensive loss attributable to MKHL at October 1, 2016	$ (79.8)		$ (79.8)