Equity Method Investments - Summary of carrying value and fair value of investments (Detail) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Carrying Value	$ 29,066	$ 28,050
Kraft Heinz [Member]
Schedule of Equity Method Investments [Line Items]
Carrying Value	13,230	12,937
Fair Value	12,035	13,249
Occidental [Member]
Schedule of Equity Method Investments [Line Items]
Carrying Value	15,410	11,484
Fair Value	14,552	12,242
Other [Member]
Schedule of Equity Method Investments [Line Items]
Carrying Value	$ 426	$ 3,629