Debt & Non-recourse Debt - Schedule of Outstanding Borrowings (Parenthetical) (Details) - USD ($) $ in Millions			9 Months Ended	12 Months Ended
		Jun. 30, 2021	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Debt instrument, average interest rate			4.108%	3.357%
Less: unamortized deferred financing costs and discount	[1],[2],[3]		$ (55)	$ (5)
Debt issuance discounts			6
Revolving Credit Facility
Debt Instrument [Line Items]
Less: unamortized deferred financing costs and discount			$ (3)	(4)
Revolving Credit Facility | Revolver with a weighted average rate of 2.70%, due 2023
Debt Instrument [Line Items]
Debt instrument, average interest rate			2.70%
Debt instrument, maturity year			2023
Line of Credit
Debt Instrument [Line Items]
Less: unamortized deferred financing costs and discount			$ (26)	(1)
Line of Credit | Term loan with a rate of 2.70%, due 2023
Debt Instrument [Line Items]
Debt instrument, average interest rate			2.70%
Debt instrument, maturity year			2023
Line of Credit | Term loan with a weighted average rate of 3.50% due 2028
Debt Instrument [Line Items]
Debt instrument, average interest rate			3.50%
Debt instrument, maturity year			2028
Senior Notes
Debt Instrument [Line Items]
Less: unamortized deferred financing costs and discount		$ (24)	$ (23)	$ (4)
Senior Notes | 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%
Senior Notes | Senior notes with a rate of 5.000%, due 2029
Debt Instrument [Line Items]
Debt instrument, maturity year		2029	2029
Debt instrument, stated interest rate		5.00%	5.00%
Senior Notes | Senior notes with a rate of 4.875% due 2031
Debt Instrument [Line Items]
Debt instrument, maturity year		2031	2031
Debt instrument, stated interest rate		4.875%	4.875%
Non-recourse Debt
Debt Instrument [Line Items]
Debt instrument, average interest rate			2.925%	3.173%
Less: unamortized deferred financing costs and discount	[4],[5]		$ (7)	$ (9)
Non-recourse Debt | Timeshare Facility with an average rate of 1.017%, due 2023
Debt Instrument [Line Items]
Debt instrument, average interest rate			1.017%
Debt instrument, maturity year			2023
Non-recourse Debt | HGV Securitized Debt with a weighted average rate of 2.711%, due 2028
Debt Instrument [Line Items]
Debt instrument, average interest rate			2.711%
Debt instrument, maturity year			2028
Non-recourse Debt | HGV Securitized Debt with a weighted average rate of 3.602%, due 2032
Debt Instrument [Line Items]
Debt instrument, average interest rate			3.602%
Debt instrument, maturity year			2032
Non-recourse Debt | HGV Securitized Debt with a weighted average rate of 2.431%, due 2033
Debt Instrument [Line Items]
Debt instrument, average interest rate			2.431%
Debt instrument, maturity year			2033
Non-recourse Debt | HGV Securitized Debt with a weighted average rate of 3.658%, due 2039
Debt Instrument [Line Items]
Debt instrument, average interest rate			3.658%
Debt instrument, maturity year			2039
Non-recourse Debt | Diamond Resorts Premium Yield Facility with an average rate of 4.766%, due 2031
Debt Instrument [Line Items]
Debt instrument, average interest rate			4.766%
Debt instrument, maturity year			2031
Non-recourse Debt | Diamond Resorts Owner Trust 2017 with a weighted average rate of 3.504%, due 2029
Debt Instrument [Line Items]
Debt instrument, average interest rate			3.504%
Debt instrument, maturity year			2029
Non-recourse Debt | Diamond Resorts Owner Trust 2018 with a weighted average rate of 4.061%, due 2031
Debt Instrument [Line Items]
Debt instrument, average interest rate			4.061%
Debt instrument, maturity year			2031
Non-recourse Debt | Diamond Resorts Owner Trust 2019 with a weighted average rate of 3.277%, due 2032
Debt Instrument [Line Items]
Debt instrument, average interest rate			3.277%
Debt instrument, maturity year			2032
Non-recourse Debt | Diamond Resorts Owner Trust 2021 with a weighted average rate of 2.160%, due 2032
Debt Instrument [Line Items]
Debt instrument, average interest rate			2.16%
Debt instrument, maturity year			2032
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				$ (3)
Debt issuance discounts			$ 2

[1] (2) Amount includes deferred financing costs and related to our term loan and senior notes of $26 million and $23 million, respectively, as of September 30, 2021 and $1 million and $4 million, respectively, as of December 31, 2020. This amount also includes original issuance discounts of $6 million as of September 30, 2021.

[2] (3) Amount does not include deferred financing costs of $3 million and $4 million as of September 30, 2021 and December 31, 2020, respectively, related to our revolving facility included in Other assets in our unaudited condensed consolidated balance sheets.

[3] As of September 30, 2021 and December 31, 2020, weighted-average interest rates were 4.108 percent and 3.357 percent, respectively.

[4] Amount relates to Securitized Debt only and does not include deferred financing costs of $2 million and $3 million as of September 30, 2021 and December 31, 2020, respectively, relating to our Timeshare Facility included in Other Assets in our unaudited condensed consolidated balance sheets.

[5] As of September 30, 2021 and December 31, 2020, weighted-average interest rates were 2.925 percent and 3.173 percent, respectively.