Equity Method Investments - Summary of carrying value and fair value of investments (Detail) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Schedule Of Equity Method Investments [Line Items]
Carrying Value	$ 27,493	$ 28,050
Kraft Heinz [Member]
Schedule Of Equity Method Investments [Line Items]
Carrying Value	13,199	12,937
Fair Value	11,553	13,249
Occidental [Member]
Schedule Of Equity Method Investments [Line Items]
Carrying Value	13,861	11,484
Fair Value	13,179	12,242
Other [Member]
Schedule Of Equity Method Investments [Line Items]
Carrying Value	$ 433	$ 3,629