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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Jun. 30, 2018 | Jul. 01, 2017 | Mar. 31, 2018
Operating Loss Carryforwards [Line Items] |  |  |
Effective tax rate | 9.40% | 16.40% |
Unrecognized tax benefits | $ 123.2 |  | $ 107.4
Decrease in unrecognized tax benefits is possible in the next twelve months | $ 34.4 |  |
United Kingdom | Foreign Tax Authority |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Provision for incomes taxes at the U.K. statutory tax rate | 19.00% |  |

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