XML 124 R111.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Business Segments (Details4) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Sales | $ 1,037.9 | $ 1,020.2 | $ 1,009.5 | $ 979.0 | $ 909.9 | $ 869.1 | $ 880.2 | $ 865.9 | $ 4,046.6 | $ 3,525.1 | $ 3,134.6
Identifiable Assets | $ 5,501.8 |  |  |  | $ 5,185.4 |  |  |  | $ 5,501.8 | $ 5,185.4 | $ 5,170.0
Percent of total | 100.00% |  |  |  | 100.00% |  |  |  | 100.00% | 100.00% | 100.00%
United States |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  | $ 2,348.1 | $ 2,070.6 | $ 1,857.5
Identifiable Assets | $ 4,859.1 |  |  |  | $ 4,547.7 |  |  |  | $ 4,859.1 | $ 4,547.7 | $ 4,591.5
Percent of total | 88.00% |  |  |  | 88.00% |  |  |  | 88.00% | 88.00% | 89.00%
China |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  | $ 320.0 | $ 265.6 | $ 214.1
Identifiable Assets | $ 287.3 |  |  |  | $ 276.0 |  |  |  | $ 287.3 | $ 276.0 | $ 249.3
Percent of total | 5.00% |  |  |  | 5.00% |  |  |  | 5.00% | 5.00% | 5.00%
United Kingdom |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  | $ 242.1 | $ 231.6 | $ 183.8
Identifiable Assets | $ 136.7 |  |  |  | $ 122.7 |  |  |  | $ 136.7 | $ 122.7 | $ 122.8
Percent of total | 3.00% |  |  |  | 2.00% |  |  |  | 3.00% | 2.00% | 2.00%
Germany |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  | $ 247.2 | $ 217.1 | $ 177.7
France |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  | 183.6 | 165.6 | 142.6
Japan |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  | 214.9 | 131.7 | 151.9
Other [Member] |  |  |  |  |  |  |  |  |  |  |
Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Identifiable Assets | $ 218.7 |  |  |  | $ 239.0 |  |  |  | $ 218.7 | $ 239.0 | $ 206.4
Percent of total | 4.00% |  |  |  | 5.00% |  |  |  | 4.00% | 5.00% | 4.00%

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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_Assets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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
- Details
Name: | srt_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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

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