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Discontinued Operations - Summary of Assets and Liabilities of Discontinued Operations (Details) - USD ($) $ in Millions | Dec. 30, 2018 | Dec. 31, 2017
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Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Current assets of discontinued operations | $ 8.3 | $ 58.6
Non-current assets of discontinued operations | 0.0 | 38.8
Current liabilities of discontinued operations | 5.3 | 29.2
Herley | Discontinued Operations, Disposed of by Sale |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Cash and cash equivalents | 0.0 | (0.9)
Accounts receivable, net | 8.2 | 56.0
Inventoried costs | 0.0 | 1.5
Other current assets | 0.1 | 2.0
Current assets of discontinued operations | 8.3 | 58.6
Property, plant and equipment, net | 0.0 | 3.0
Goodwill | 0.0 | 35.6
Other assets | 0.0 | 0.2
Non-current assets of discontinued operations | 0.0 | 38.8
Accounts payable | 0.3 | 14.2
Accrued expenses | 0.4 | 4.7
Accrued compensation | 0.0 | 4.6
Billings in excess of cost and earnings on uncompleted contracts | 0.0 | 4.3
Other current liabilities | 4.6 | 1.4
Current liabilities of discontinued operations | 5.3 | 29.2
Other long-term liabilities of discontinued operations | $ 6.4 | $ 6.0

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