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Accounts Receivable
12 Months Ended
Dec. 31, 2020
Receivables [Abstract]  
Accounts Receivable Accounts Receivable
Accounts receivable, net are summarized as follows ($ in millions):
December 31,
20202019
Trade receivables$130.9 $114.6 
Business tax credits, including VAT4.0 5.2 
Hedge contracts receivable0.3 4.9 
Other receivables14.4 20.0 
Less allowance for doubtful accounts and sales discounts(1.1)(1.5)
Total accounts receivable, net$148.5 $143.2