NOTE 4. INVENTORIES

The classes of inventory as of December 31 are summarized as follows ($ in millions):



	2017		2016
Finished goods	$	217.2	$	198.3
Work in process	78.9		79.3
Raw materials	284.5		267.0
Total	$	580.6	$	544.6

As of December 31, 2017 and 2016, the difference between inventories valued at LIFO and the value of that same inventory if the FIFO method had been used was not significant. The liquidation of LIFO inventory did not have a significant impact on our results of operations in any period presented.