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Additional Financial Information - Income Statement Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |
Depreciation expense | $ 15,112 | $ 14,937 | $ 14,592
Interest costs on debt balances | 7,382 | 7,123 | 5,429
Net amortization of debt discount | 230 | 219 | 214
Capitalized interest costs | (963) | (1,818) | (2,030)
Advertising expense | 3,976 | 3,847 | 3,556
Other income (expense), net |  |  |
Interest income | 336 | 354 | 146
Other components of net periodic benefit (cost) income | 300 | (938) | 2,386
Net debt extinguishment gains (losses) | 385 | 308 | (1,077)
Other, net | (26) | (37) | (82)
Other income (expense), net | $ 995 | $ (313) | $ 1,373

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