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Other Intangible Assets - Other Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Finite-Lived Intangible Assets [Line Items] |  |
Gross Cost | $ 1,254 | $ 1,914
Accumulated Amortization | (1,041) | (1,269)
Net Cost | 213 | 645
Technologies & licences [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Cost | 742 | 882
Accumulated Amortization | (630) | (723)
Net Cost | 112 | 159
Contractual customer relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Cost | 13 | 488
Accumulated Amortization | (11) | (171)
Net Cost | 2 | 317
Purchased software [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Cost | 356 | 358
Accumulated Amortization | (312) | (291)
Net Cost | 44 | 67
Construction in progress [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Cost | 39 | 87
Net Cost | 39 | 87
Other intangible assets [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Cost | 104 | 99
Accumulated Amortization | (88) | (84)
Net Cost | $ 16 | $ 15

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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