Equity method investments - Unaudited financial information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 26, 2021	Dec. 31, 2020	Dec. 26, 2020
Schedule of Equity Method Investments [Line Items]
Assets	$ 912,493		$ 912,493			$ 873,729
Liabilities	433,693		433,693			$ 422,393
Sales	69,114	$ 56,840	133,713	$ 118,105
The Kraft Heinz Company [Member]
Schedule of Equity Method Investments [Line Items]
Assets					$ 97,038		$ 99,830
Liabilities					$ 46,896		$ 49,587
Sales	6,615	6,648	13,009	12,805
Net earnings (loss) attributable to Kraft Heinz common shareholders	$ (27)	$ (1,651)	$ 536	$ (1,273)