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Recently Issued Accounting Pronouncements - Expected impact resulting from adoption of standard (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
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Jun. 30, 2018 | Mar. 31, 2018 | Dec. 30, 2017 | Sep. 30, 2017 | Jul. 01, 2017 | Apr. 01, 2017 | Dec. 31, 2016 | Oct. 01, 2016 | Jun. 30, 2018 | Jul. 01, 2017 | Jul. 02, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Net Revenues | $ 264.0 | $ 219.4 | $ 201.8 | $ 195.2 | $ 198.1 | $ 196.0 | $ 206.5 | $ 210.8 | $ 880.4 | $ 811.4 | $ 906.3
Gross Profit | $ 136.2 | $ 123.7 | $ 116.1 | $ 116.2 | $ 119.2 | $ 117.0 | $ 124.7 | $ 125.1 | 492.2 | 486.0 | $ 549.7
Period Adjustment |  |  |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Net Revenues |  |  |  |  |  |  |  |  | (5.4) | (7.6) |
Gross Profit |  |  |  |  |  |  |  |  | (4.6) | (8.1) |
As Adjusted |  |  |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Net Revenues |  |  |  |  |  |  |  |  | 875.0 | 803.8 |
Gross Profit |  |  |  |  |  |  |  |  | $ 487.6 | $ 477.9 |

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