Goodwill and Intangible Assets Goodwill - Additional Information (Details) $ in Millions		3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 29, 2018 USD ($) goodwill_reporting_unit	Dec. 29, 2018 USD ($) goodwill_reporting_unit	Sep. 29, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 30, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jul. 01, 2017 USD ($)	Apr. 01, 2017 USD ($)	Jun. 30, 2018 USD ($)	Jul. 01, 2017 USD ($)	Sep. 29, 2018 USD ($)	Sep. 30, 2017 USD ($)	Dec. 29, 2018 USD ($) goodwill_reporting_unit	Dec. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 28, 2018 USD ($)
Goodwill [Line Items]
Number of reporting units | goodwill_reporting_unit														20
Goodwill	$ 36,503	$ 36,503	$ 44,339	$ 44,302	$ 44,844	$ 44,825	$ 44,859	$ 44,566	$ 44,301	$ 44,302	$ 44,566	$ 44,339	$ 44,859	$ 36,503	$ 44,825
Impairment losses	$ 6,900	$ 6,875	$ 0	$ 133	0	0	$ 0	$ 0	$ 0	$ 133	$ 0	$ 133	$ 0	$ 7,008	0	$ 0
Number of reporting units with fair value more likely than not below carrying amount | goodwill_reporting_unit	7	7												7
Number of reporting units unlikely to have fair value below carrying amount | goodwill_reporting_unit	13	13												13
Number of reporting units with impairment recognized | goodwill_reporting_unit	5	5												5
Number of reporting units with no impairment recognized | goodwill_reporting_unit	2	2												2
Reporting unit, percentage of fair value in excess of carrying amount	20.00%	20.00%												20.00%
Number of reporting units with fair value that exceeds carrying value of less than twenty percent | goodwill_reporting_unit	4	4												4
Goodwill, impaired, accumulated impairment loss	$ (7,000)	$ (7,000)												$ (7,000)
Goodwill carrying value, aggregate reporting units with a fair value that exceeds the carrying value by less than twenty percent	29,000	29,000				29,300								29,000	29,300
Goodwill carrying value, aggregate reporting units with zero percent excess fair value over carrying amount	9,300	9,300				24,000								9,300	24,000
Australia and New Zealand
Goodwill [Line Items]
Reporting unit, goodwill carrying amount prior to impairment					509
Goodwill carrying value, goodwill reporting unit with a fair value that exceeds the carrying value by less than twenty percent	367	367												367
Canada Retail
Goodwill [Line Items]
Impairment losses	1,900
Reporting unit, goodwill carrying amount prior to impairment																	$ 4,000
Latin America Exports
Goodwill [Line Items]
Goodwill carrying value, goodwill reporting unit with a fair value that exceeds the carrying value by less than twenty percent	424	424												424
Northeast Asia
Goodwill [Line Items]
Impairment losses	302
Reporting unit, goodwill carrying amount prior to impairment																	391
Southeast Asia
Goodwill [Line Items]
Impairment losses	315
Other Latin America
Goodwill [Line Items]
Impairment losses	207
U.S. Refrigerated
Goodwill [Line Items]
Impairment losses	4,100
Reporting unit, goodwill carrying amount prior to impairment																	$ 11,300
U.S. Grocery
Goodwill [Line Items]
Goodwill carrying value, goodwill reporting unit with a fair value that exceeds the carrying value by less than twenty percent	18,500	18,500												18,500
Southeast Europe
Goodwill [Line Items]
Goodwill carrying value, goodwill reporting unit with a fair value that exceeds the carrying value by less than twenty percent	$ 404	$ 404												$ 404
Impaired reporting unit
Goodwill [Line Items]
Reporting unit, percentage of fair value in excess of carrying amount	0.00%	0.00%												0.00%
EMEA
Goodwill [Line Items]
Goodwill	$ 3,074	$ 3,074				3,238								$ 3,074	3,238
Impairment losses														0
EMEA | Goodwill
Goodwill [Line Items]
Prior period reclassification adjustment					179
Rest of World
Goodwill [Line Items]
Goodwill	$ 1,394	$ 1,394				$ 2,640								1,394	$ 2,640
Impairment losses														$ 957
Rest of World | Goodwill
Goodwill [Line Items]
Prior period reclassification adjustment					$ (179)