Intangible Assets and Goodwill - Carrying Values of Finite-Lived Intangible Assets (Details) - USD ($) $ in Millions	Sep. 29, 2018	Mar. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 710.6	$ 734.8
Accumulated Amortization	(123.3)	(113.2)
Net	587.3	621.6
Indefinite-lived intangible assets	571.3	614.1
Total intangible assets, excluding goodwill	1,158.6	1,235.7
Goodwill	796.9	847.7
Reacquired rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	400.4	400.4
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	23.0	23.0
Lease rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	71.8	80.1
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 215.4	$ 231.3

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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-Publisher FASB
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

+ References

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- Definition

Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

+ References

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