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Supplemental Disclosures (Tables)
12 Months Ended
Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Allowance for Doubtful Accounts
Accounts receivable, net are summarized as follows ($ in millions):
December 31,
20212020
Trade receivables$208.9 $130.9 
Business tax credits, including VAT7.8 4.0 
Hedge contracts receivable0.4 0.3 
Other receivables22.3 14.4 
Less allowance for doubtful accounts and sales discounts(1.4)(1.1)
Total accounts receivable, net$238.0 $148.5 
Analysis of Allowances for Doubtful Accounts:
($ in millions)
For the Years Ended December 31,
202120202019
Allowance for Doubtful Accounts
Beginning balance$1.1 $1.5 $1.7 
Bad debt expense0.3 1.0 0.4 
Recoveries(0.1)— (0.3)
Write-offs and discounts0.1 (1.4)(0.3)
Ending balance$1.4 $1.1 $1.5 
Schedule of Cash Flow, Supplemental Disclosures
Supplemental Cash Flow Information
($ in millions)
For the Years Ended December 31,
202120202019
Interest paid$47.4 $31.4 $29.1 
Income taxes paid22.4 14.8 20.8 
Capital spending in accounts payable and accrued liabilities6.3 5.2 5.9