Business Segment Information (Details Textual) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Business Segment and Geographical Information (Textual) [Abstract]
Property plant and equipment expenditures	$ 186	$ 83	$ 389	$ 243
Hotel [Member]
Business Segment and Geographical Information (Textual) [Abstract]
Segment Reporting Information, Investment in Equity Method Investees	226		226		285
Property plant and equipment expenditures	100	36	183	119
Vacation Ownership & Residential [Member]
Business Segment and Geographical Information (Textual) [Abstract]
Segment Reporting Information, Investment in Equity Method Investees	30		30		27
Property plant and equipment expenditures	42	38	118	108
Property plant and equipment expenditures [Member]
Business Segment and Geographical Information (Textual) [Abstract]
Property plant and equipment expenditures	$ 139	$ 49	$ 280	$ 119