Debt & Non-recourse Debt - Schedule of Outstanding Borrowings (Parenthetical) (Details) - USD ($) $ in Millions		9 Months Ended		12 Months Ended
		Sep. 30, 2019		Dec. 31, 2018		Aug. 31, 2019
Debt Instrument [Line Items]
Debt instrument, average interest rate		4.739%		5.17%
Less: unamortized deferred financing costs and discount		$ (7)	[1],[2]	$ (8)	[1],[2]	$ (4)
Revolving Credit Facility
Debt Instrument [Line Items]
Less: unamortized deferred financing costs and discount		$ (5)		$ (6)
Revolving Credit Facility | Revolver with an average rate of 3.766%, due 2023
Debt Instrument [Line Items]
Debt instrument, average interest rate		3.766%		3.766%
Debt instrument, maturity year		2023		2023
Line of Credit | Term loan with an average rate of 3.766%, due 2023
Debt Instrument [Line Items]
Debt instrument, average interest rate		3.766%		3.766%
Debt instrument, maturity year		2023		2023
Less: unamortized deferred financing costs and discount		$ (2)		$ (2)
Senior Notes | Senior notes with a rate of 6.125%, due 2024
Debt Instrument [Line Items]
Debt instrument, maturity year		2024		2024
Debt instrument, stated interest rate		6.125%		6.125%
Less: unamortized deferred financing costs and discount		$ (5)		$ (6)
Non-recourse Debt
Debt Instrument [Line Items]
Debt instrument, average interest rate		2.874%		3.126%
Less: unamortized deferred financing costs and discount	[3]	$ (9)		$ (7)
Non-recourse Debt | Timeshare Facility with an average rate of 3.164%, due 2021
Debt Instrument [Line Items]
Debt instrument, maturity year		2021		2021
Debt instrument, stated interest rate		3.164%		3.164%
Less: unamortized deferred financing costs and discount		$ (3)		$ (3)
Non-recourse Debt | Securitized Debt with a rate of 2.280%, due 2026
Debt Instrument [Line Items]
Debt instrument, maturity year		2026		2026
Debt instrument, stated interest rate		2.28%		2.28%
Non-recourse Debt | Securitized Debt with an average rate of 1.810%, due 2026
Debt Instrument [Line Items]
Debt instrument, average interest rate		1.81%		1.81%
Debt instrument, maturity year		2026		2026
Non-recourse Debt | Securitized Debt with an average rate of 2.711%, due 2028
Debt Instrument [Line Items]
Debt instrument, average interest rate		2.711%		2.711%
Debt instrument, maturity year		2028		2028
Non-recourse Debt | Securitized Debt with an average rate of - %, due 2032
Debt Instrument [Line Items]
Debt instrument, average interest rate		3.602%		3.602%
Debt instrument, maturity year		2032		2032
Non-recourse Debt | Securitized Debt with an average rate of 2.431%, due 2033
Debt Instrument [Line Items]
Debt instrument, average interest rate		2.431%		2.431%
Debt instrument, maturity year		2033		2033

[1] Amount does not include deferred financing costs of $5 million as of September 30, 2019 and $6 million as of December 31, 2018, relating to our revolving facility included in Other Assets in our condensed consolidated balance sheets.

[2] Amount includes deferred financing costs related to our term loan and senior notes of $2 million and $5 million, respectively, as of September 30, 2019 and $2 million and $6 million as of December 31, 2018.

[3] Amount relates to securitized debt only and does not include deferred financing costs of $3 million as of September 30, 2019 and December 31, 2018 relating to our Timeshare Facility which are included in Other Assets in our condensed consolidated balance sheets.