Equity method investments - Summary of earnings and distributions received from equity method investments (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Schedule of Equity Method Investments [Line Items]
Equity in Earnings	$ 126	$ 493
Distributions Received	195	175
Kraft Heinz [Member]
Schedule of Equity Method Investments [Line Items]
Equity in Earnings	195	215
Distributions Received	130	130
Occidental [Member]
Schedule of Equity Method Investments [Line Items]
Equity in Earnings	(82)	263
Distributions Received	56	41
Berkadia [Member]
Schedule of Equity Method Investments [Line Items]
Equity in Earnings	13	15
Distributions Received	$ 9	$ 4