Basis of Presentation Basis of Presentation (Recently Issued Accounting Pronouncements) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Deferred income taxes		$ 0
Total current assets	$ 1,843	1,743
Other non-current assets	366	361
Total assets	9,743	9,591
Liabilities and Equity
Long-term securitized vacation ownership debt	1,898	1,897
Long-term debt	3,318	3,031
Deferred income taxes	1,198	1,154
Total liabilities	8,946	8,638
Total liabilities and equity	$ 9,743	9,591
Scenario, Previously Reported [Member]
Current assets:
Deferred income taxes		126
Total current assets		1,869
Other non-current assets		360
Total assets		9,716
Liabilities and Equity
Long-term securitized vacation ownership debt		1,921
Long-term debt		3,034
Deferred income taxes		1,252
Total liabilities		8,763
Total liabilities and equity		9,716
Accounting Standards Update 2015-17 [Member] | Scenario, Adjustment [Member] | New Accounting Pronouncement, Early Adoption, Effect [Member]
Current assets:
Deferred income taxes		(126)
Total current assets		(126)
Other non-current assets		28
Total assets		(98)
Liabilities and Equity
Deferred income taxes		(98)
Total liabilities		(98)
Total liabilities and equity		(98)
Accounting Standards Update 2015-03 [Member] | Scenario, Adjustment [Member]
Current assets:
Other non-current assets		(27)
Total assets		(27)
Liabilities and Equity
Long-term securitized vacation ownership debt		(24)
Long-term debt		(3)
Total liabilities		(27)
Total liabilities and equity		$ (27)