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Debt and Financing Arrangements (Tables) | 3 Months Ended
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Dec. 31, 2021
Debt Disclosure [Abstract] |
Components of Net Financing Charges | Net financing charges consisted of the following (in millions):
| Three Months Ended December 31, |  |
| 2021 |  | 2020 |  |  |  |
Interest expense, net of capitalized interest costs | $ | 55 |  |  | $ | 59 |  |  |  |  |
Banking fees and bond cost amortization | 5 |  |  | 8 |  |  |  |  |
Interest income | (2) |  |  | (3) |  |  |  |  |
Net foreign exchange results for financing activities | (5) |  |  | (5) |  |  |  |  |
Net financing charges | $ | 53 |  |  | $ | 59 |  |  |  |  |

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