Earnings Per Share (Details) (USD $) In Thousands, except Per Share data	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Earnings Per Share
Net income attributable to Expedia, Inc.	$ 140,393	$ 114,262	$ 192,432	$ 173,657
Earnings per share attributable to Expedia, Inc. available to common stockholders:
Basic	$ 0.51	$ 0.40	$ 0.70	$ 0.61
Diluted	$ 0.50	$ 0.40	$ 0.69	$ 0.60
Weighted average number of shares outstanding, basic	273,592	284,088	273,725	286,333
Options to purchase common stock	3,148	4,027	3,209	4,256
Other dilutive securities	1,366	860	1,202	1,137
Weighted average number of shares outstanding, diluted	278,106	288,975	278,136	291,726

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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+ Details

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References+ Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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+ Details