Allowance for Doubtful Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of year	$ 29	$ 24	$ 152
Balance at end of year	30	29	24
Vendor receivable related allowance for doubtful accounts	3	3	2
Allowance for Doubtful Accounts
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of year	26	25	23
Charged to costs and expenses	17	18	11
Customer accounts written off—net of recoveries	(14)	(17)	(9)
Balance at end of year	$ 29	$ 26	$ 25