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OTHER ASSETS (Tables) | 9 Months Ended
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Sep. 30, 2018
Other Assets [Abstract] |
Schedule of Other Assets | Included in other assets were the following:
| September 30, 2018 |  | December 31, 2017 |  | September 30, 2017
| ($ in millions)
Investments in non-consolidated affiliates | $ | 8.3 |  |  | $ | 28.5 |  |  | $ | 28.2 |
Deferred debt issuance costs | 2.1 |  |  | 2.5 |  |  | 2.7 |
Tax-related receivables | 4.9 |  |  | 10.2 |  |  | 13.1 |
Derivative contracts | 1.6 |  |  | 3.6 |  |  | 3.7 |
Supply contracts | 1,108.9 |  |  | 1,137.1 |  |  | 1,146.3 |
Other | 33.8 |  |  | 26.5 |  |  | 21.6 |
Other assets | $ | 1,159.6 |  |  | $ | 1,208.4 |  |  | $ | 1,215.6 |

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- Definition Tabular disclosure of the carrying amounts of other assets. This disclosure includes other current assets and other noncurrent assets. + References No definition available. + Details
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