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Debt and Financing Arrangements (Tables) | 3 Months Ended
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Dec. 31, 2018
Debt Disclosure [Abstract] |
Components of Net Financing Charges | The Company's net financing charges line item in the consolidated statements of income for the three months ended December 31, 2018 and 2017 contained the following components (in millions):
| Three Months Ended December 31,
| 2018 |  | 2017
Interest expense, net of capitalized interest costs | $ | 91 |  |  | $ | 102 |
Banking fees and bond cost amortization | 6 |  |  | 7 |
Interest income | (7 | ) |  | (7 | )
Net foreign exchange results for financing activities | (5 | ) |  | — |
Net financing charges | $ | 85 |  |  | $ | 102 |

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