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Inventories, Net
12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Inventories, Net Inventories
The components of inventories were as follows at December 31, (in millions):
 
2019
 
2018
Raw material and supplies
$
231.0

 
$
262.5

Work-in-process
135.3

 
151.2

Finished products
1,240.4

 
1,347.0

 
$
1,606.7

 
$
1,760.7

Inventory costs include direct materials, direct labor and manufacturing overhead, or when finished goods are sourced, the cost is the amount paid to the third party. Approximately 22.8% and 23.6% of gross inventory costs at December 31, 2019 and 2018, respectively, were determined by the last-in, first-out (“LIFO”) method; for the balance, cost was determined using the first-in, first-out (“FIFO”) method. At December 31, 2019 and 2018, LIFO reserves were a liability of $13.9 million and $6.7 million,
respectively. The pre-tax (expense) income from continuing operations recognized by the Company related to the liquidation of LIFO-based inventories in 2019, 2018 and 2017 was ($3.3) million, ($0.3) million and $1.2 million, respectively.