| Supplemental Financial Information |
Supplemental Financial Information Interest Expense, Net | | | | | | | | | | | | | years ended December 31 (in millions) | 2019 | | 2018 | | 2017 | Interest expense | $ | 1,784 |
| | $ | 1,348 |
| | $ | 1,150 |
| Interest income | (275 | ) | | (204 | ) | | (146 | ) | Interest expense, net | $ | 1,509 |
| | $ | 1,144 |
| | $ | 1,004 |
|
Accounts Payable and Accrued Liabilities | | | | | | | | | as of December 31 (in millions) | 2019 | | 2018 | Sales rebates | $ | 4,484 |
| | $ | 3,939 |
| Dividends payable | 1,771 |
| | 1,607 |
| Accounts payable | 1,452 |
| | 1,546 |
| Salaries, wages and commissions | 830 |
| | 787 |
| Royalty and license arrangements | 324 |
| | 304 |
| Other | 2,971 |
| | 3,748 |
| Accounts payable and accrued liabilities | $ | 11,832 |
| | $ | 11,931 |
|
Other Long-Term Liabilities | | | | | | | | | as of December 31 (in millions) | 2019 | | 2018 | Contingent consideration liabilities | $ | 7,201 |
| | $ | 4,306 |
| Income taxes payable | 3,453 |
| | 4,311 |
| Pension and other post-employment benefits | 2,949 |
| | 1,840 |
| Liabilities for unrecognized tax benefits | 2,772 |
| | 2,726 |
| Other | 1,222 |
| | 1,307 |
| Other long-term liabilities | $ | 17,597 |
| | $ | 14,490 |
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