Vacation Ownership Contract Receivables (Allowance For Loan Losses On Vacation Ownership Contract Receivables) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Allowance for Loan Losses [Roll Forward]
Allowance for loan losses, beginning balance			$ 581	$ 581
Provision for loan losses	$ 104	$ 78	256	184
Contract receivables write-offs, net			(218)	(181)
Allowance for loan losses, ending balance	$ 619	$ 584	$ 619	$ 584