XML 51 R36.htm IDEA: XBRL DOCUMENT v2.4.1.9

Inventories (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Inventory Disclosure [Abstract]
Raw materials and supplies	$ 234.5us-gaap_InventoryRawMaterialsAndSupplies		$ 249.3us-gaap_InventoryRawMaterialsAndSupplies
Work-in-process	1,186.3us-gaap_InventoryWorkInProcess		1,184.1us-gaap_InventoryWorkInProcess
Finished goods	177.0us-gaap_InventoryFinishedGoods		172.2us-gaap_InventoryFinishedGoods
Total inventories at current cost	1,597.8us-gaap_InventoryGross		1,605.6us-gaap_InventoryGross
Adjustment from current cost to LIFO cost basis	4.3us-gaap_InventoryLIFOReserve		4.8us-gaap_InventoryLIFOReserve
Inventory valuation reserves	(66.4)us-gaap_InventoryValuationReserves		(68.8)us-gaap_InventoryValuationReserves
Progress payments	(63.1)us-gaap_ProgressPaymentsNettedAgainstInventoryForLongTermContractsOrPrograms		(68.8)us-gaap_ProgressPaymentsNettedAgainstInventoryForLongTermContractsOrPrograms
Total inventories, net	1,472.6us-gaap_InventoryNet		1,472.8us-gaap_InventoryNet
Inventory [Line Items]
Lifo Provision (Benefit)	0.5ati_LifoProvisionBenefit	9.0ati_LifoProvisionBenefit
High Performance Materials & Components
Inventory [Line Items]
Change in inventory valuation reserve	(0.5)ati_Changeininventoryvaluationreserve / us-gaap_StatementBusinessSegmentsAxis = ati_HighPerformanceMaterialsComponentsMember	(9.0)ati_Changeininventoryvaluationreserve / us-gaap_StatementBusinessSegmentsAxis = ati_HighPerformanceMaterialsComponentsMember
Flat Rolled Products
Inventory [Line Items]
Change in inventory valuation reserve	$ 5.3ati_Changeininventoryvaluationreserve / us-gaap_StatementBusinessSegmentsAxis = ati_FlatRolledProductsMember	$ 8.3ati_Changeininventoryvaluationreserve / us-gaap_StatementBusinessSegmentsAxis = ati_FlatRolledProductsMember

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount of difference between inventory at lower of LIFO cost or market and inventory at lower of other inventory accounting method cost or market, for example, but not limited to, FIFO or average cost.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed.

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Amount of advances received from customers under long-term contracts which have been offset against inventories accounts at the balance sheet date.

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