| Supplemental Financial Information |
Supplemental Financial Information Interest Expense, Net | | | | | | | | | | | | | | | | | | | years ended December 31 (in millions) | 2023 | | 2022 | | 2021 | | Interest expense | $ | 2,224 | | | $ | 2,230 | | | $ | 2,423 | | | Interest income | (540) | | | (186) | | | (39) | | | Interest expense, net | $ | 1,684 | | | $ | 2,044 | | | $ | 2,384 | |
Accounts Payable and Accrued Liabilities | | | | | | | | | | | | | as of December 31 (in millions) | 2023 | | 2022 | | Sales rebates | $ | 13,627 | | | $ | 10,717 | | | Dividends payable | 2,783 | | | 2,680 | | | Accounts payable | 3,688 | | | 2,934 | | | Current portion of contingent consideration liabilities | 1,952 | | | 1,469 | | | Salaries, wages and commissions | 1,802 | | | 1,371 | | | Royalty and license arrangements | 360 | | | 412 | | | Other | 6,438 | | | 5,819 | | | Accounts payable and accrued liabilities | $ | 30,650 | | | $ | 25,402 | |
Other Long-Term Liabilities | | | | | | | | | | | | | as of December 31 (in millions) | 2023 | | 2022 | | Contingent consideration liabilities | $ | 17,938 | | | $ | 14,915 | | | Liabilities for unrecognized tax benefits | 6,681 | | | 6,502 | | | Income taxes payable | 2,182 | | | 2,985 | | | Pension and other post-employment benefits | 1,538 | | | 1,638 | | | Other | 3,988 | | | 4,615 | | | Other long-term liabilities | $ | 32,327 | | | $ | 30,655 | |
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