Debt & Non-recourse Debt - Schedule of Outstanding Borrowings (Parenthetical) (Details) - USD ($) $ in Millions		1 Months Ended		12 Months Ended
		Sep. 30, 2020	Nov. 30, 2016	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Debt instrument, average interest rate				3.357%	4.571%
Less: unamortized deferred financing costs and discount	[1],[2]			$ (5)	$ (6)
Revolving Credit Facility
Debt Instrument [Line Items]
Less: unamortized deferred financing costs and discount				$ (4)	$ (5)
Revolving Credit Facility | Revolver with an average rate of 2.25%, due 2023
Debt Instrument [Line Items]
Debt instrument, average interest rate				2.25%	2.25%
Debt instrument, maturity year				2023	2023
Line of Credit | Term loans with an average rate of 2.25%, due 2023
Debt Instrument [Line Items]
Debt instrument, average interest rate				2.25%	2.25%
Debt instrument, maturity year				2023	2023
Less: unamortized deferred financing costs and discount				$ (1)	$ (1)
Line of Credit | Senior notes with a rate of 6.125%, due 2024
Debt Instrument [Line Items]
Debt instrument, maturity year			2024
Debt instrument, stated interest rate			6.125%
Less: unamortized deferred financing costs and discount			$ (8)
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				$ (4)	$ (5)
Non-recourse Debt
Debt Instrument [Line Items]
Debt instrument, average interest rate				3.173%	2.876%
Less: unamortized deferred financing costs and discount	[3]			$ (9)	$ (8)
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%	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 3.602%, 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 2.421%, due 2033
Debt Instrument [Line Items]
Debt instrument, average interest rate				2.421%	2.421%
Debt instrument, maturity year				2033	2033
Non-recourse Debt | Securitized Debt with an average rate of 3.658%, due 2039
Debt Instrument [Line Items]
Debt instrument, average interest rate				3.658%	3.658%
Debt instrument, maturity year				2039	2039
Non-recourse Debt | Timeshare Facility with an average rate of 3.164%, due 2021
Debt Instrument [Line Items]
Less: unamortized deferred financing costs and discount				$ (3)	$ (3)

[1] Amount does not include deferred financing costs of $4 and $5 million as of December 31, 2020 and 2019, respectively, relating to our revolving facility included in Other Assets in our consolidated balance sheets.

[2] Amount includes deferred financing costs related to our term loan and senior notes of $1 million and $4 million, respectively as of December 31, 2020 and $1 million and $5 million, respectively as of December 31, 2019.

[3] Amount relates to Securitized Debt only and does not include deferred financing costs of $3 million as of December 31, 2020 and 2019, respectively, relating to our Timeshare Facility included in Other Assets in our consolidated balance sheets.