v3.26.1
Equity method investments - Narrative (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Schedule Of Equity Method Investments [Line Items]          
Net earnings attributable to common shareholders $ 25,667,000,000   $ 12,370,000,000 $ 35,773,000,000 $ 16,973,000,000
The Kraft Heinz Company [Member]          
Schedule Of Equity Method Investments [Line Items]          
Equity method investment ownership percentage 27.50%     27.50%  
Equity method investments, pre-tax impairment loss     5,000,000,000    
Excess of equity method carrying value $ 2,800,000,000   $ 5,000,000,000 $ 2,800,000,000 $ 5,000,000,000
The Kraft Heinz Company [Member] | Common Stock [Member]          
Schedule Of Equity Method Investments [Line Items]          
Percentage of excess of carrying values over fair values of investments 12.20%     12.20%  
Excess of carrying value over fair value of equity investment $ 1,100,000,000     $ 1,100,000,000  
Occidental Petroleum Corporation [Member]          
Schedule Of Equity Method Investments [Line Items]          
Equity method investment ownership percentage 26.70%     26.70%  
Occidental Petroleum Corporation [Member] | OxyChem [Member]          
Schedule Of Equity Method Investments [Line Items]          
Net earnings attributable to common shareholders   $ 3,100,000,000      
Occidental Petroleum Corporation [Member] | Common Stock [Member]          
Schedule Of Equity Method Investments [Line Items]          
Excess of carrying value of investment over investees equity   $ 2,500,000,000      
Berkadia Commercial Mortgage LLC [Member]          
Schedule Of Equity Method Investments [Line Items]          
Equity method investment ownership percentage 50.00%     50.00%  
Berkadia Commercial Mortgage LLC [Member] | Jefferies Financial Group Inc. [Member]          
Schedule Of Equity Method Investments [Line Items]          
Equity method investment ownership percentage 50.00%     50.00%  
Berkadia Commercial Mortgage LLC [Member] | Commercial Paper [Member]          
Schedule Of Equity Method Investments [Line Items]          
Maximum outstanding balance of commercial paper borrowings $ 1,500,000,000     $ 1,500,000,000