Assets (Detail) (USD $) In Millions	Sep. 09, 2011	Dec. 31, 2010
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	$ 8,465	$ 8,983
Total Reportable Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	6,446	6,689
North American Full Service Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	1,230	1,221
North American Limited Service Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	526	465
International Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	1,023	822
Luxury Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	904	871
Timeshare Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	2,763	3,310
Other Unallocated Corporate
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	$ 2,019	$ 2,294