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Other Current Liabilities
 12 Months Ended
Dec. 31, 2020
Other Current Liabilities [Abstract]  
Other Current Liabilities Other Current Liabilities
Other current liabilities as of December 31 included the following:

($ in millions)20202019
Deferred income$51.0 $27.5 
Dividends payable12.6 11.8 
Accrued commissions, rebates and royalties10.0 9.7 
Accrued retirement plans (excluding pension)8.4 7.9 
Accrued taxes other than income15.4 6.5 
Accrued professional services3.7 5.9 
Accrued interest3.3 3.3 
Restructuring and severance related charges7.8 2.6 
Short term derivative instruments9.5 0.2 
Other21.9 15.9 
Total other current liabilities$143.6 $91.3