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Inventories
 12 Months Ended
Sep. 30, 2018
Inventory Disclosure [Abstract]  
Inventories
INVENTORIES

Inventories are primarily carried at the lower of cost or net realizable value using the weighted average cost method. In addition, certain lubricants with a replacement cost of $89 million at September 30, 2018 and $83 million at September 30, 2017 are valued at the lower of cost or market using the LIFO method. 

The following summarizes Valvoline’s inventories in the Consolidated Balance Sheets as of September 30:

(In millions)
 
2018
 
2017
Finished products
 
$
189

 
$
180

Raw materials, supplies and work in process
 
30

 
31

Reserve for LIFO cost valuation
 
(40
)
 
(33
)
Excess and obsolete inventory reserves
 
(3
)
 
(3
)
Total inventories, net
 
$
176

 
$
175