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Debt and Financing Arrangements (Tables) | 3 Months Ended
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Dec. 31, 2017
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, 2017 and 2016 contained the following components (in millions):
| Three Months Ended December 31,
| 2017 |  | 2016
Interest expense, net of capitalized interest costs | $ | 114 |  |  | $ | 110 |
Banking fees and bond cost amortization | 13 |  |  | 30 |
Interest income | (9 | ) |  | (7 | )
Net foreign exchange results for financing activities | (2 | ) |  | 3 |
Net financing charges | $ | 116 |  |  | $ | 136 |

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