|
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 | ||||||||