Supplementary Information - Summary of Other Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting [Abstract]
Investments in APS projects	$ 2,083	$ 2,111
Pension and other postretirement plan assets	472	629
Operating lease assets	702	718
Exploration data costs capitalized	196	151
Fair value of hedge contracts	14	65
Other	299	378
Total other assets	$ 3,766	$ 4,052