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Significant business acquisitions and other transactions - Summary of preliminary values of identified assets acquired and liabilities assumed (Detail) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Jan. 31, 2023 | Dec. 31, 2022
--- | --- | --- | --- | ---
Assets acquired |  |  |  |  |
Goodwill | [1] | $ 83,880 | $ 84,626 |  | $ 78,119
Pilot Travel Centers LLC [Member] |  |  |  |  |
Assets acquired |  |  |  |  |
Property, plant and equipment |  |  |  | $ 8,015 |
Goodwill |  |  |  | 6,605 |
Other intangible assets |  |  |  | 6,853 |
Other assets |  |  |  | 7,047 |
Assets acquired |  |  |  | 28,520 |
Liabilities assumed and noncontrolling interests |  |  |  |  |
Notes payable |  |  |  | 5,876 |
Other liabilities |  |  |  | 4,918 |
Liabilities assumed |  |  |  | 10,794 |
Noncontrolling interests, predominantly redeemable |  |  |  | 3,361 |
Liabilities assumed and noncontrolling interests |  |  |  | 14,155 |
Net assets |  |  |  | $ 14,365 |
[1] | Net of accumulated goodwill impairments of $11.5 billion as of December 31, 2024, $11.1 billion as of December 31, 2023 and $11.0 billion as of December 31, 2022.

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