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Debt (Tables) | 9 Months Ended
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Sep. 30, 2018
Debt Disclosure [Abstract] |
Schedule of Debt Instruments | Debt at September 30, 2018 and December 31, 2017 was as follows (in millions):
| September 30, 2018 |  | December 31, 2017
Allegheny Technologies 5.875% Notes due 2023 (a) | $ | 500.0 |  |  | $ | 500.0 |
Allegheny Technologies 5.95% Notes due 2021 | 500.0 |  |  | 500.0 |
Allegheny Technologies 4.75% Convertible Senior Notes due 2022 | 287.5 |  |  | 287.5 |
Allegheny Ludlum 6.95% debentures due 2025 | 150.0 |  |  | 150.0 |
Term Loan due 2022 | 100.0 |  |  | 100.0 |
U.S. revolving credit facility | — |  |  | — |
Foreign credit facilities | 10.0 |  |  | 6.3 |
Other | 15.5 |  |  | 10.0 |
Debt issuance costs | (11.1 | ) |  | (13.1 | )
Total debt | 1,551.9 |  |  | 1,540.7 |
Short-term debt and current portion of long-term debt | 16.6 |  |  | 10.1 |
Total long-term debt | $ | 1,535.3 |  |  | $ | 1,530.6 |
(a) Bearing interest at 7.875% effective February 15, 2016.

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- Definition The entire disclosure for long-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI http://asc.fasb.org/topic&trid=2208564 + Details
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