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Interest Expense | 9 Months Ended
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Sep. 30, 2021
Interest Expense [Abstract] |
Interest Expense | Interest Expense Details of interest expense are as follows:
| Three months ended September 30, |  | Nine months ended September 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
| (in millions)
Interest on borrowings(1) | $ | 43 |  |  | $ | 46 |  |  | $ | 133 |  |  | $ | 139 |
Fees on financing agreements(1) | 3 |  |  | 2 |  |  | 7 |  |  | 6 |
Interest on tax liabilities(2) | — |  |  | — |  |  | — |  |  | (4) |
Total interest expense | $ | 46 |  |  | $ | 48 |  |  | $ | 140 |  |  | $ | 141 |
_______________________________________________________________________________ (1)See Note 12—Financing Agreements for additional information. (2)Interest on tax liabilities for the nine months ended September 30, 2020 consists of a reduction in interest accrued on the reserve for unrecognized tax benefits.

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