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Debt (Tables) | 12 Months Ended
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Dec. 31, 2017
Debt Disclosure [Abstract] |
Schedule of debt | Debt at December 31, 2017 and 2016 was as follows:
(In millions) |  | 2017 |  | 2016
Allegheny Technologies $500 million 5.875% Senior Notes due 2023 (a) |  | $ | 500.0 |  |  | $ | 500.0 |
Allegheny Technologies $500 million 5.95% Senior Notes due 2021 |  | 500.0 |  |  | 500.0 |
Allegheny Technologies $350 million 9.375% Senior Notes due 2019 |  | — |  |  | 350.0 |
Allegheny Technologies $287.5 million 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 agreements |  | 6.3 |  |  | 4.4 |
Other |  | 10.0 |  |  | 2.2 |
Debt issuance costs |  | (13.1 | ) |  | (17.1 | )
Total short-term and long-term debt |  | 1,540.7 |  |  | 1,877.0 |
Short-term debt and current portion of long-term debt |  | 10.1 |  |  | 105.1 |
Total long-term debt |  | $ | 1,530.6 |  |  | $ | 1,771.9 |
(a) | Bearing interest at 7.875% effective February 15, 2016.

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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