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INVENTORY (Tables)
 12 Months Ended
Dec. 31, 2017
Inventory Disclosure [Abstract]  
Composition of Inventory
The following table shows the composition of our inventory balances:
($ in millions)
 
At Year-End 2017
 
At Year End 2016
Finished goods(1) 
 
$
391

 
$
352

Work-in-progress
 
2

 
40

Land and infrastructure(2) 
 
330

 
331

Real estate inventory
 
723

 
723

Operating supplies and retail inventory
 
5

 
4

 
 
$
728

 
$
727

_________________________
(1) 
Represents completed inventory that is either registered for sale as vacation ownership interests, or unregistered and available for sale in its current form.
(2) 
Includes $68 million of inventory related to estimated future foreclosures at December 31, 2017.