XML 85 R74.htm IDEA: XBRL DOCUMENT v3.23.2
Investment and derivative contract gains (losses) - Narrative (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Jan. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items]          
Sales of equity securities     $ 25,833 $ 12,044  
Taxable gains (losses) on sales of equity securities $ 2,400 $ 76 4,600 $ (663)  
Pilot Travel Centers LLC [Member]          
Derivative Instruments, Gain (Loss) [Line Items]          
Other Investment gains from remeasurement     $ 3,000    
Equity interest ownership percentage 38.60%   38.60%   38.60%