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Accounts Receivable | 12 Months Ended
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Dec. 31, 2017
Accounts Receivable [Abstract] |
Accounts Receivable | Accounts Receivable Accounts receivable are summarized as follows ($ in millions):
| December 31,
| 2017 |  | 2016
Trade receivables | $ | 120.2 |  |  | $ | 98.2 |
Business tax credits, including VAT | 4.3 |  |  | 3.1 |
Hedge contracts receivable | 4.8 |  |  | 1.0 |
Other receivables | 21.1 |  |  | 13.6 |
Less allowance for doubtful accounts and sales discounts | (1.0 | ) |  | (0.8 | )
Total accounts receivable | $ | 149.4 |  |  | $ | 115.1 |

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