Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Millions	3 Months Ended
Mar. 28, 2020	Mar. 30, 2019
Income Statement [Abstract]
Loss (income) on disposal of discontinued operations, tax	$ 0	$ 0

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

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration