Summary of Significant Accounting Policies (Details 4) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Sales Returns and Allowances [Member]
Rollforward of activity in the Company's allowance for doubtful accounts and its aggregate reserves for returns, discounts, end-of-season markdowns and operational chargebacks
Beginning reserve balance	$ 167.2	$ 199.6	$ 202.5	$ 202.8
Amount charged against revenue to increase reserve	150.5	175.6	250.2	293.3
Amount credited against customer accounts to decrease reserve	(119.2)	(146.2)	(249.3)	(272.2)
Foreign currency translation	0.2	2.5	(4.7)	7.6
Ending reserve balance	198.7	231.5	198.7	231.5
Allowance for Doubtful Accounts
Rollforward of activity in the Company's allowance for doubtful accounts and its aggregate reserves for returns, discounts, end-of-season markdowns and operational chargebacks
Beginning reserve balance	18.7	13.9	19.7	11.6
Amount recorded to expense to increase (decrease) reserve	(0.5)	3.8	(0.5)	6.3
Amount credited against customer accounts to decrease reserve	(1.0)	(0.7)	(1.4)	(1.4)
Foreign currency translation	0.0	0.3	(0.6)	0.8
Ending reserve balance	$ 17.2	$ 17.3	$ 17.2	$ 17.3

Foreign currency translation adjustments.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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- Definition

Amount of valuation and qualifying accounts and reserves.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09)
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

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Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense.

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Amount of increase in valuation and qualifying accounts and reserves from charge to accounts other than cost and expense.

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Amount of decrease in valuation and qualifying accounts and reserves.

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