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Acquisitions - Pro-Forma Consolidated Results of Operations (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended
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Dec. 30, 2017 | Dec. 31, 2016 | Dec. 30, 2017 | Dec. 31, 2016
Jimmy Cho PLC |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Pro-forma total revenue | $ 1,478.5 | $ 1,499.1 | $ 3,832.6 | $ 3,819.6
Pro-forma net income | $ 242.8 | $ 279.4 | $ 574.2 | $ 586.2
Pro-forma net income per ordinary share, basic (dollars per share) | $ 1.60 | $ 1.71 | $ 3.76 | $ 3.49
Pro-forma net income per ordinary share, diluted (dollars per share) | $ 1.57 | $ 1.69 | $ 3.70 | $ 3.44
Michael Kors (HK) Limited |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Pro-forma total revenue |  | $ 1,352.8 |  | $ 3,455.3
Pro-forma net income |  | $ 271.0 |  | $ 584.0
Pro-forma net income per ordinary share, basic (dollars per share) |  | $ 1.66 |  | $ 3.48
Pro-forma net income per ordinary share, diluted (dollars per share) |  | $ 1.64 |  | $ 3.43

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