Debt & Non-recourse Debt - Schedule of Outstanding Borrowings (Parenthetical) (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Debt instrument, average interest rate		4.441%	3.357%
Less: unamortized deferred financing costs and discount	[1],[2]	$ (6)	$ (5)
Revolving Credit Facility
Debt Instrument [Line Items]
Less: unamortized deferred financing costs and discount		$ (4)	$ (4)
Revolving Credit Facility | Revolver with a weighted average rate of 3.75%, due 2023
Debt Instrument [Line Items]
Debt instrument, average interest rate		3.75%	3.75%
Debt instrument, maturity year		2023	2023
Line of Credit | Term loan with a rate of 3.75%, due 2023
Debt Instrument [Line Items]
Debt instrument, average interest rate		3.75%	3.75%
Debt instrument, maturity year		2023	2023
Less: unamortized deferred financing costs and discount		$ (2)	$ (1)
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)	$ (4)
Non-recourse Debt
Debt Instrument [Line Items]
Debt instrument, average interest rate		3.174%	3.173%
Less: unamortized deferred financing costs and discount	[3]	$ (8)	$ (9)
Non-recourse Debt | Securitized Debt with a weighted 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 a weighted 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 a weighted 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
Non-recourse Debt | Securitized Debt with a weighted 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 X.XXX%, due 2022
Debt Instrument [Line Items]
Less: unamortized deferred financing costs and discount		$ (2)	$ (3)

[1] Amount includes deferred financing costs related to our term loan and senior notes of $2 million and $4 million, respectively, as of March 31, 2021 and $1 million and $4 million, respectively, as of December 31, 2020.

[2] Amount does not include deferred financing costs of $4 million as of March 31, 2021 and December 31, 2020, relating to our revolving facility included in Other Assets in our condensed consolidated balance sheets.

[3] Amount relates to Securitized Debt only and does not include deferred financing costs of $2 million and $3 million as of March 31, 2021 and December 31, 2020, respectively, relating to our Timeshare Facility included in Other Assets in our condensed consolidated balance sheets.