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Debt (Table) | 6 Months Ended
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Mar. 31, 2018
Debt Disclosure [Abstract] |
Components of Debt | Long-term debt at March 31, 2018 and September 30, 2017 consisted of the following:
| March 31, 2018 |  | September 30, 2017
| (In thousands)
Unsecured 8.50% Senior Notes, due March 2019 | $ | 450,000 |  |  | $ | 450,000 |
Unsecured 3.00% Senior Notes, due 2027 | 500,000 |  |  | 500,000 |
Unsecured 5.95% Senior Notes, due 2034 | 200,000 |  |  | 200,000 |
Unsecured 5.50% Senior Notes, due 2041 | 400,000 |  |  | 400,000 |
Unsecured 4.15% Senior Notes, due 2043 | 500,000 |  |  | 500,000 |
Unsecured 4.125% Senior Notes, due 2044 | 750,000 |  |  | 750,000 |
Medium-term note Series A, 1995-1, 6.67%, due 2025 | 10,000 |  |  | 10,000 |
Unsecured 6.75% Debentures, due 2028 | 150,000 |  |  | 150,000 |
Floating-rate term loan, due September 2019(1) | 125,000 |  |  | 125,000 |
Total long-term debt | 3,085,000 |  |  | 3,085,000 |
Less: |  |  |
Original issue premium / discount on unsecured senior notes and debentures | (4,412 | ) |  | (4,384 | )
Debt issuance cost | 21,520 |  |  | 22,339 |
Current maturities | 450,000 |  |  | — |
| $ | 2,617,892 |  |  | $ | 3,067,045 |

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