Accounts Receivable and Finance Receivables - Finance receivables (Details) - USD ($) $ in Millions	Sep. 28, 2019	Dec. 29, 2018
Finance Receivables
Finance receivables	$ 755	$ 789
Allowance for losses	(25)	(29)
Total finance receivables, net	$ 730	$ 760

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Name:	us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant