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Goodwill And Other Intangible Assets (Other Intangible Assets) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Finite-Lived Intangible Assets [Line Items]    
Total amortizable intangible assets, Gross carrying amount $ 1,122 $ 1,152
Indefinite-lived trade names and trademarks, Gross carrying amount 77 35
Total amortizable intangible assets, Accumulated amortization (705) (663)
Total other intangible assets, Gross carrying amount 1,199 1,187
Total other intangible assets, Accumulated amortization (705) (663)
Computer Software [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Total amortizable intangible assets, Gross carrying amount 902 936
Total amortizable intangible assets, Accumulated amortization (595) (555)
Patents And Licenses [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Total amortizable intangible assets, Gross carrying amount 148 148
Total amortizable intangible assets, Accumulated amortization (85) (80)
Other Intangibles [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Total amortizable intangible assets, Gross carrying amount 72 68
Total amortizable intangible assets, Accumulated amortization $ (25) $ (28)