XML 132 R107.htm IDEA: XBRL DOCUMENT v2.4.1.9

Business Segments (Details3) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Asset Reconciling Item [Line Items]
Identifiable Assets	$ 6,582.6us-gaap_Assets	$ 6,898.5us-gaap_Assets	$ 6,247.8us-gaap_Assets
High Performance Materials & Components [Member]
Segment Reporting Asset Reconciling Item [Line Items]
Identifiable Assets	3,555.8us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ati_HighPerformanceMaterialsComponentsMember	3,452.2us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ati_HighPerformanceMaterialsComponentsMember	3,720.7us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ati_HighPerformanceMaterialsComponentsMember
Flat Rolled Products [Member]
Segment Reporting Asset Reconciling Item [Line Items]
Identifiable Assets	2,601.6us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ati_FlatRolledProductsMember	2,320.9us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ati_FlatRolledProductsMember	1,857.0us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ati_FlatRolledProductsMember
Discontinued Operations [Member]
Segment Reporting Asset Reconciling Item [Line Items]
Identifiable Assets	1.8us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_SegmentDiscontinuedOperationsMember	9.8us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_SegmentDiscontinuedOperationsMember	214.0us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_SegmentDiscontinuedOperationsMember
Corporate Prepaid Pension Cost [Member]
Segment Reporting Asset Reconciling Item [Line Items]
Identifiable Assets	0us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ati_CorporatePrepaidPensionCostMember	5.1us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ati_CorporatePrepaidPensionCostMember	0us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ati_CorporatePrepaidPensionCostMember
Corporate: Deferred Tax Assets [Member]
Segment Reporting Asset Reconciling Item [Line Items]
Identifiable Assets	0us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ati_DeferredTaxAssetsMember	0us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ati_DeferredTaxAssetsMember	71.5us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ati_DeferredTaxAssetsMember
Corporate: Cash and cash equivalents and other [Member]
Segment Reporting Asset Reconciling Item [Line Items]
Identifiable Assets	$ 423.4us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ati_CashAndCashEquivalentsAndOtherMember	$ 1,110.5us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ati_CashAndCashEquivalentsAndOtherMember	$ 384.6us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ati_CashAndCashEquivalentsAndOtherMember

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.18)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 12

-Article 7



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 18

-Article 5

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

X

- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
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X

- Details

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Namespace Prefix:
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Balance Type:
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X

- Details

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X

- Details

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X

- Details

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X

- Details

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- Details

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Period Type: