XML 26 R15.htm IDEA: XBRL DOCUMENT
v3.10.0.1

INVENTORIES | 9 Months Ended
--- | ---
Sep. 30, 2018
Inventory Disclosure [Abstract] |
INVENTORIES | INVENTORIES Inventories consisted of the following:
| September 30, 2018 |  | December 31, 2017 |  | September 30, 2017
| ($ in millions)
Supplies | $ | 63.7 |  |  | $ | 66.1 |  |  | $ | 60.3 |
Raw materials | 70.1 |  |  | 75.3 |  |  | 85.4 |
Work in process | 155.9 |  |  | 127.8 |  |  | 120.6 |
Finished goods | 493.6 |  |  | 462.6 |  |  | 470.7 |
| 783.3 |  |  | 731.8 |  |  | 737.0 |
LIFO reserve | (58.9 | ) |  | (49.2 | ) |  | (47.5 | )
Inventories, net | $ | 724.4 |  |  | $ | 682.6 |  |  | $ | 689.5 |
Inventories are valued at the lower of cost and net realizable value. For U.S. inventories, inventory costs are determined principally by the last-in, first-out (LIFO) method of inventory accounting while for international inventories, inventory costs are determined principally by the first-in, first-out (FIFO) method of inventory accounting. Cost for other inventories has been determined principally by the average-cost method (primarily operating supplies, spare parts and maintenance parts). Elements of costs in inventories included raw materials, direct labor and manufacturing overhead. Inventories under the LIFO method are based on annual estimates of quantities and costs as of year-end; therefore, the condensed financial statements at September 30, 2018 reflect certain estimates relating to inventory quantities and costs at December 31, 2018. The replacement cost of our inventories would have been approximately $58.9 million, $49.2 million and $47.5 million higher than reported at September 30, 2018, December 31, 2017 and September 30, 2017, respectively.

X
- References No definition available. + Details
Name: | us-gaap_InventoryDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
Name: | us-gaap_InventoryDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration