Assets Held for Sale Activity (Detail) $ in Millions	12 Months Ended
Dec. 29, 2018 USD ($)
Property Plant And Equipment [Abstract]
Additions	$ 6
Ending Balance	$ 6

Amount classified as other assets attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant