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Shareholders' Equity - Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2017 | Oct. 01, 2016 | May 25, 2017
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Ordinary shares repurchased, value |  | $ 160,900,000 |  |
Share Repurchase Program |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Share repurchase program, authorized amount |  |  |  | $ 1,000,000,000
Ordinary shares repurchased (in shares) | 0 | 4,543,500 | 13,044,832 |
Ordinary shares repurchased, value |  | $ 157,800,000 | $ 650,000,000 |
Ordinary shares repurchased, remaining availability | $ 842,200,000 | $ 842,200,000 |  |
Withhold to Cover Repurchase Program |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Ordinary shares repurchased (in shares) |  | 91,122 | 99,739 |
Ordinary shares repurchased, value |  | $ 3,100,000 | $ 4,700,000 |

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