Transfer And Servicing Of Financial Assets (Summary Of Total Vacation Ownership Receivables And Other Securitized Assets, Net Of Securitized Liabilities And Allowance For Loan Losses) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Transfers and Servicing [Abstract]
SPE assets in excess of SPE liabilities	$ 578	$ 765
Non-securitized contract receivables	985	757
Less: Allowance for loan losses	497	394	362	370
Total, net	$ 1,066	$ 1,128