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Dispositions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Jun. 17, 2011	Dec. 31, 2010 Location
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of hotels sold		2
Proceeds from sale of hotels		$ 12
Non-cash impairment charges	$ 3
Assets Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of hotels	1

The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.