Discontinued Operations (Assets and Liabilities of Viant Business) (Details) - Discontinued Operations, Held-for-sale - AS&O Business - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jun. 28, 2019	Sep. 27, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from transition services		$ 2.9
Transition services, cost of sales		0.1
Transition services, selling, general and administrative		$ 2.8
Net working capital adjustment	$ 4.8

Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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