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Other current assets
 12 Months Ended
Dec. 31, 2020
Subclassifications of assets, liabilities and equities [abstract]  
Other current assets Other current assets
The following table provides details related to Other current assets as of December 31, 2020 and 2019:
($ millions)20202019
Current portion of long-term financial investments measured at FVPL12 33 
Current portion of long-term receivables from customers107 122 
Current portion of minimum lease payments from finance lease agreements29 46 
Prepaid expenses93 89 
Other receivables, security deposits and current assets88 147 
Derivative financial instruments 3 1 
VAT receivable72 64 
Total other current assets404 502