Annual report pursuant to Section 13 and 15(d)

Intangible Assets (Narrative) (Details)

v2.4.0.6
Intangible Assets (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Distribution Rights [Member]
Dec. 31, 2011
Distribution Rights [Member]
Dec. 31, 2012
Customer Relationships [Member]
Dec. 31, 2011
Customer Relationships [Member]
Dec. 31, 2012
Other [Member]
Dec. 31, 2011
Other [Member]
Dec. 11, 2012
TripAdvisor, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]                      
Goodwill, Impaired, Accumulated Impairment Loss $ 138 $ 138                  
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 9 years                    
Business Acquisition, Purchase Price Allocation, Intangible Assets Not Amortizable                     1,800
Finite-Lived Intangible Assets, Gross 6,877 6,877 5,523   2,326 2,305 3,608 2,618 943 600  
Finite-Lived Intangible Assets, Accumulated Amortization (3,760) (3,760) (3,314)   (1,554) (1,391) (1,747) (1,535) (459) (388)  
Finite-Lived Intangible Assets, Net 3,117 3,117 2,209   772 914 1,861 1,083 484 212  
Amortization expense for intangible assets with finite useful lives   $ 462 $ 490 $ 426