Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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.

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

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This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

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Percentage of voting equity interests acquired in a business combination achieved in stages, including equity interests in the acquiree held by the acquirer immediately before the acquisition date and acquired at the acquisition date.

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and elected not to be offset.

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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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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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Acquisitions - Additional Information (Details) £ / shares in Units, $ in Millions				3 Months Ended		4 Months Ended	6 Months Ended
	Jul. 25, 2017 GBP (£) £ / shares	Jul. 25, 2017 USD ($)	May 31, 2016 USD ($)	Sep. 30, 2017 USD ($)	Oct. 01, 2016 USD ($)	Oct. 01, 2016 USD ($)	Sep. 30, 2017 USD ($)	Oct. 01, 2016 USD ($)	Apr. 01, 2017 USD ($)
Business Acquisition [Line Items]
Goodwill				$ 119.7			$ 119.7		$ 119.7
Michael Kors (HK) Limited
Business Acquisition [Line Items]
Ownership interest (percentage)			100.00%
Fair value of consideration provided			$ 500.0
Goodwill			$ 96.5
Revenue of acquiree since acquisition date				66.9	$ 51.4	$ 72.0	136.7
Net income (loss) of acquiree since acquisition date				$ 0.0	$ (3.8)	$ (6.0)	2.4
Transaction costs								$ 11.3
Michael Kors (HK) Limited \| Customer relationships
Business Acquisition [Line Items]
Intangible asset, weighted average useful life (in years)			10 years
MK Panama
Business Acquisition [Line Items]
Total transaction value in a business acquisition							$ 0.5
Percentage of ownership interest after acquisition				75.00%			75.00%
Forward foreign currency exchange contracts
Business Acquisition [Line Items]
Derivative notional amount				$ 1,645.2			$ 1,645.2		167.5
Not Designated as Hedging Instrument \| Forward foreign currency exchange contracts
Business Acquisition [Line Items]
Derivative notional amount	£ 1,115,000,000.000			1,468.6			1,468.6		$ 0.0
Forward foreign currency exchange contracts - assets				$ 36.7			$ 36.7
Michael Kors Bidco \| Subsidiaries \| Jimmy Cho PLC
Business Acquisition [Line Items]
Total purchase price of equity \| £	£ 896,000,000
Purchase price per share (in gbp per share) \| £ / shares	£ 2.30
Total transaction value in a business acquisition		$ 1,400.0