Equity method investments - Unaudited financial information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 26, 2022	Mar. 31, 2021	Mar. 27, 2021	Dec. 31, 2021	Dec. 25, 2021
Schedule Of Equity Method Investments [Line Items]
Assets	$ 969,506				$ 958,784
Sales	$ 70,810		$ 64,599
The Kraft Heinz Company [Member]
Schedule Of Equity Method Investments [Line Items]
Assets		$ 93,864				$ 93,394
Liabilities		44,020				$ 43,942
Sales		6,045		$ 6,394
Net earnings attributable to Kraft Heinz common shareholders		$ 776		$ 563