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Subsequent Event	9 Months Ended
	Sep. 30, 2015
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event On October 15, 2015, in response to business conditions, the Company commenced a reduction in force among salaried employees within the High Performance Materials & Components segment and the ATI Corporate office. A charge of approximately $6 million will be recognized in the fourth quarter 2015 for severance and other post-employment benefits arising from the reduction in force. The $6 million in cash costs for the termination benefits will be paid over a period of up to 12 months.

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- Definition

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

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