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Receivables
 12 Months Ended
Dec. 31, 2018
Receivables [Abstract]  
Receivables
RECEIVABLES
Receivables consist of the following:
 
December 31,
Dollar amounts in millions
2018
 
2017
Trade receivables
$
86.7

 
$
124.6

Income tax receivable
16.3

 
2.2

Other receivables
25.4

 
16.6

Allowance for doubtful accounts
(0.8
)
 
(0.9
)
 
$
127.6

 
$
142.5



Other receivables at December 31, 2018 and 2017 primarily consist of sales tax receivables, vendor rebates, interest receivables, a receivable associated with an affiliate and other miscellaneous receivables.

Additionally, as of December 31, 2017, we had $22.2 million recorded as notes receivable from asset sales related to a transaction that occurred during 1998. The note receivable provided collateral for our limited recourse note payable (see Note 13). This receivable was collected during 2018 and the associated limited recourse note payable matured and was paid.