Equity Method Investments - Summary of carrying value and fair value of investments (Detail) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Schedule Of Equity Method Investments [Line Items]
Carrying Value	$ 26,403	$ 28,050
Kraft Heinz [Member]
Schedule Of Equity Method Investments [Line Items]
Carrying Value	13,033	12,937
Fair Value	12,585	13,249
Occidental [Member]
Schedule Of Equity Method Investments [Line Items]
Carrying Value	12,927	11,484
Fair Value	13,217	12,242
Other [Member]
Schedule Of Equity Method Investments [Line Items]
Carrying Value	$ 443	$ 3,629