XML 129 R110.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Business Segments (Details4) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  | $ 738.9 | $ 832.7 | $ 1,022.5 | $ 1,125.5 | $ 1,047.5 | $ 1,069.6 | $ 1,119.0 | $ 987.3 | $ 3,719.6 | $ 4,223.4 | $ 4,043.5
Identifiable Assets |  | $ 5,751.7 |  |  |  | $ 6,571.7 |  |  |  | $ 5,751.7 | $ 6,571.7 | $ 6,885.0
Percent of total |  | 100.00% |  |  |  | 100.00% |  |  |  | 100.00% | 100.00% | 100.00%
United States [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Identifiable Assets |  | $ 5,073.1 |  |  |  | $ 5,868.7 |  |  |  | $ 5,073.1 | $ 5,868.7 | $ 6,131.9
Percent of total |  | 88.00% |  |  |  | 90.00% |  |  |  | 88.00% | 90.00% | 89.00%
United Kingdom [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Identifiable Assets |  | $ 154.3 |  |  |  | $ 196.3 |  |  |  | $ 154.3 | $ 196.3 | $ 208.0
Percent of total |  | 3.00% |  |  |  | 3.00% |  |  |  | 3.00% | 3.00% | 3.00%
China [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Identifiable Assets |  | $ 260.0 |  |  |  | $ 280.5 |  |  |  | $ 260.0 | $ 280.5 | $ 258.1
Percent of total |  | 5.00% |  |  |  | 4.00% |  |  |  | 5.00% | 4.00% | 4.00%
Luxembourg [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Identifiable Assets | [1] | $ 124.4 |  |  |  | $ 81.8 |  |  |  | $ 124.4 | $ 81.8 | $ 145.9
Percent of total | [1] | 2.00% |  |  |  | 1.00% |  |  |  | 2.00% | 1.00% | 2.00%
Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Identifiable Assets |  | $ 139.9 |  |  |  | $ 144.4 |  |  |  | $ 139.9 | $ 144.4 | $ 141.1
Percent of total |  | 2.00% |  |  |  | 2.00% |  |  |  | 2.00% | 2.00% | 2.00%
External Sales [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  | $ 3,719.6 | $ 4,223.4 | $ 4,043.5
Percent of total |  |  |  |  |  |  |  |  |  | 100.00% | 100.00% | 100.00%
External Sales [Member] | United States [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  | $ 2,142.6 | $ 2,615.9 | $ 2,458.4
Percent of total |  |  |  |  |  |  |  |  |  | 58.00% | 62.00% | 61.00%
External Sales [Member] | United Kingdom [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  | $ 198.2 | $ 228.4 | $ 251.5
Percent of total |  |  |  |  |  |  |  |  |  | 5.00% | 5.00% | 6.00%
External Sales [Member] | China [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  | $ 246.9 | $ 249.6 | $ 237.7
Percent of total |  |  |  |  |  |  |  |  |  | 7.00% | 6.00% | 6.00%
External Sales [Member] | Germany [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  | $ 193.3 | $ 207.7 | $ 215.4
Percent of total |  |  |  |  |  |  |  |  |  | 5.00% | 5.00% | 5.00%
External Sales [Member] | France [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  | $ 153.3 | $ 168.1 | $ 152.8
Percent of total |  |  |  |  |  |  |  |  |  | 4.00% | 4.00% | 4.00%
External Sales [Member] | Canada [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  | $ 154.5 | $ 147.0 | $ 141.0
Percent of total |  |  |  |  |  |  |  |  |  | 4.00% | 3.00% | 4.00%
External Sales [Member] | Italy [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  | $ 65.0 | $ 160.7 | $ 132.3
Percent of total |  |  |  |  |  |  |  |  |  | 2.00% | 4.00% | 3.00%
External Sales [Member] | Japan [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  | $ 202.3 | $ 89.3 | $ 124.7
Percent of total |  |  |  |  |  |  |  |  |  | 5.00% | 2.00% | 3.00%
External Sales [Member] | Mexico [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  | $ 78.4 | $ 76.5 | $ 54.9
Percent of total |  |  |  |  |  |  |  |  |  | 2.00% | 2.00% | 1.00%
External Sales [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  | $ 285.1 | $ 280.2 | $ 274.8
Percent of total |  |  |  |  |  |  |  |  |  | 8.00% | 7.00% | 7.00%
[1] | Comprises assets held by the Company’s European Treasury Center operation.

X
- Definition Entity Wide Disclosure On Geographic Areas Revenue From External Customers Attributed To Individual Foreign Countries Amount as a percentage of total + References No definition available. + Details
Name: | ati_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToIndividualForeignCountriesPercentageAmount
Namespace Prefix: | ati_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | ati_EntityWideDisclosureOnGeographicAreasTotalAssetsAttributedToIndividualCountriesPercentageAmount
Namespace Prefix: | ati_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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 + Details
Name: | us-gaap_Assets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(a)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
Name: | us-gaap_SalesRevenueGoodsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_GB
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_CN
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_LU
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=ati_OtherCountriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorCustomersAxis=ati_ExternalCustomersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_DE
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_FR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_IT
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_JP
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_MX
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |