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v3.22.4

Additional Information | 12 Months Ended
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Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Additional Information | Additional Information
| For the Years Ended December 31,
(in millions) | 2022 |  | 2021 |  | 2020
Research and development expense | $ | 162 |  |  | $ | 145 |  |  | $ | 131 |
Interest and other debt expense, net: |  |  |  |  |
Interest expense | $ | 1,128 |  |  | $ | 1,188 |  |  | $ | 1,223 |
Interest income | (70) |  |  | (26) |  |  | (14) |
| $ | 1,058 |  |  | $ | 1,162 |  |  | $ | 1,209 |
The activity in the allowance for discounts and allowance for returned goods was as follows:
|  | For the Years Ended December 31,
(in millions) |  | 2022 |  | 2021 |  | 2020
|  | Discounts |  | Returned Goods |  | Discounts |  | Returned Goods |  | Discounts |  | Returned Goods
Balance at beginning of year |  | $ | — |  |  | $ | 50 |  |  | $ | — |  |  | $ | 40 |  |  | $ | — |  |  | $ | 32 |
Charged to costs and expenses |  | 607 |  |  | 97 |  |  | 647 |  |  | 124 |  |  | 633 |  |  | 98 |
Deductions (1) |  | (607) |  |  | (106) |  |  | (647) |  |  | (114) |  |  | (633) |  |  | (90) |
Balance at end of year |  | $ | — |  |  | $ | 41 |  |  | $ | — |  |  | $ | 50 |  |  | $ | — |  |  | $ | 40 |
(1) Represents the recording of discounts and returns for which allowances were created.

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