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Segment Information and Geographic Area Information - Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
May 02, 2020 | Feb. 01, 2020 | Oct. 26, 2019 | Jul. 27, 2019 | Apr. 27, 2019 | Jan. 26, 2019 | Oct. 27, 2018 | Jul. 28, 2018 | May 02, 2020 | Apr. 27, 2019 | Apr. 28, 2018
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales | $ 210.6 | $ 285.9 | $ 257.2 | $ 270.2 | $ 266.0 | $ 246.9 | $ 264.0 | $ 223.4 | $ 1,023.9 | $ 1,000.3 | $ 908.3
Total Tangible Long-lived Assets, Net | 225.4 |  |  |  | 191.9 |  |  |  | 225.4 | 191.9 |
U.S. |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 531.5 | 540.5 | 487.5
Total Tangible Long-lived Assets, Net | 89.8 |  |  |  | 83.9 |  |  |  | 89.8 | 83.9 |
Malta |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 143.9 | 148.5 | 184.0
Total Tangible Long-lived Assets, Net | 40.1 |  |  |  | 33.0 |  |  |  | 40.1 | 33.0 |
China |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 116.9 | 113.7 | 117.3
Total Tangible Long-lived Assets, Net | 24.1 |  |  |  | 18.6 |  |  |  | 24.1 | 18.6 |
Mexico |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 104.7 | 0.0 | 0.0
Total Tangible Long-lived Assets, Net | 24.0 |  |  |  | 9.2 |  |  |  | 24.0 | 9.2 |
Canada |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 19.5 | 101.6 | 54.4
Other |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 107.4 | 96.0 | $ 65.1
Belgium |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Tangible Long-lived Assets, Net | 21.4 |  |  |  | 22.1 |  |  |  | 21.4 | 22.1 |
Other |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 126.9 | 96.0 |
Total Tangible Long-lived Assets, Net | $ 26.0 |  |  |  | $ 25.1 |  |  |  | $ 26.0 | $ 25.1 |

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