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Acquisitions - Preliminary Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) (Details) - USD ($) $ in Millions | Nov. 01, 2017 | Mar. 31, 2018 | Apr. 01, 2017
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill |  | $ 847.7 | $ 119.7
Jimmy Cho PLC |  |  |
Business Acquisition [Line Items] |  |  |
Cash and cash equivalents | $ 34.3 |  |
Accounts receivable | 30.7 |  |
Inventory | 126.2 |  |
Other current assets | 63.9 |  |
Current assets | 255.1 |  |
Property and equipment | 51.0 |  |
Goodwill | 684.9 |  |
Deferred tax assets | 22.5 |  |
Other assets | 28.1 |  |
Total assets acquired | 1,838.1 |  |
Accounts payable | 129.3 |  |
Other current liabilities | 96.5 |  |
Current liabilities | 225.8 |  |
Deferred tax liabilities | 134.9 |  |
Other liabilities | 26.9 |  |
Total liabilities assumed | 387.6 |  |
Non-controlling interest | 3.1 |  |
Fair value of net assets acquired | 1,447.4 |  |
Fair value of acquisition consideration | 1,447.4 |  |
Inventory step-up adjustment | 9.5 |  |
Adjustment to leasehold improvements | 7.0 |  |
Jimmy Cho PLC | Customer relationships |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets | 212.8 |  |
Jimmy Cho PLC | Lease rights |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets | $ 5.9 |  |
Jimmy Cho PLC | Customer relationships - wholesale and geographic |  |  |
Business Acquisition [Line Items] |  |  |
Amortization period | 15 years |  |
Jimmy Cho PLC | Customer relationships - product licenses |  |  |
Business Acquisition [Line Items] |  |  |
Amortization period | 18 years |  |
Jimmy Cho PLC | Brand |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets | $ 577.8 |  |

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