Commitments and Contingencies Lease Accounting (Details) $ in Billions	12 Months Ended
Dec. 29, 2018 USD ($)
Lease Accounting [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated lease rights and obligations	$ 2.9

Represents the quantification of the effect of adopting the new accounting standard or change in accounting principle expected by the entity to have a significant effect on the entity's financial statements.

No definition available.

Name:	us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration