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Other Intangible Assets - Other Intangible Assets (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
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