Related Party Transactions - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified |
3 Months Ended | 6 Months Ended | |||
---|---|---|---|---|---|
Jun. 30, 2013
|
Jun. 30, 2012
|
Jun. 30, 2013
|
Jun. 30, 2012
|
Dec. 31, 2012
|
|
TripAdvisor Inc.
|
|||||
Related Party Transaction [Line Items] | |||||
Revenue recognized related to agreements with TripAdvisor | $ 1 | $ 2 | $ 3 | $ 3 | |
Expense recognized related to agreements with TripAdvisor | 54 | 56 | 115 | 107 | |
Net amounts payable | 35 | 35 | 24 | ||
Liberty
|
|||||
Related Party Transaction [Line Items] | |||||
Common stock issued from treasury stock | 467,672 | ||||
Price per share | $ 54.04 | ||||
stock issued, aggregate value | $ 25 |