Supplemental Financial Information (Schedule of Supplemental Balance Sheet Information) (Details) - USD ($)		12 Months Ended
		Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Supplemental Financial Information [Abstract]
Inventory, LIFO Reserve		$ 0.05
Accounts and notes receivable
Trade receivables		6,079,000,000	$ 5,956,000,000
Other receivables		1,164,000,000	1,197,000,000
Total receivables		7,243,000,000	7,153,000,000
Analysis of valuation allowances
Allowance, beginning of year		129,000,000	134,000,000	$ 130,000,000
Net amounts charged to expense		16,000,000	26,000,000	37,000,000
Deductions	[1]	(33,000,000)	(35,000,000)	(30,000,000)
Other	[2]	(11,000,000)	4,000,000	(3,000,000)
Allowance, end of year		101,000,000	129,000,000	$ 134,000,000
Net receivables		7,142,000,000	7,024,000,000
Inventories (c)
Raw materials	[3]	1,312,000,000	1,344,000,000
Work-in-process	[3]	178,000,000	167,000,000
Finished goods	[3]	1,638,000,000	1,436,000,000
Inventories	[3]	3,128,000,000	2,947,000,000
Other assets
Noncurrent notes and accounts receivable		86,000,000	59,000,000
Deferred marketplace spending		112,000,000	134,000,000
Prepaid Expense and Other Assets, Noncurrent	[4]	269,000,000	374,000,000
Other		293,000,000	346,000,000
Other Assets		760,000,000	913,000,000
Accounts payable and other current liabilities
Accounts payable		7,213,000,000	6,727,000,000
Accrued marketplace spending		2,541,000,000	2,390,000,000
Accrued compensation and benefits		1,755,000,000	1,785,000,000
Dividends payable		1,329,000,000	1,161,000,000
Business Combination, Contingent Consideration, Liability		1,997,000,000	0
Other current liabilities		3,277,000,000	2,954,000,000
Accounts payable and other current liabilities		$ 18,112,000,000	$ 15,017,000,000

[1] Includes accounts written off.

[2] Includes adjustments related primarily to currency translation and other adjustments.

[3] Approximately 5% of the inventory cost in 2018 and 2017 were computed using the LIFO method. The differences between LIFO and FIFO methods of valuing these inventories were not material.

[4] See Note 7 for additional information regarding our pension plans.