Fair Value Measurements - Schedule of Carrying and Estimated Fair Value Amounts (Details) - USD ($) $ in Millions		Sep. 30, 2021	Dec. 31, 2020
Carrying Amount
Assets:
Timeshare financing receivables, net	[1]	$ 1,767	$ 974
Liabilities:
Debt, net	[2]	2,929	1,159
Non-recourse debt, net	[2]	1,290	766
Level 1
Assets:
Timeshare financing receivables, net	[1]		0
Liabilities:
Debt, net	[2]	1,365	315
Non-recourse debt, net	[2]	1,227	0
Level 3
Assets:
Timeshare financing receivables, net	[1]	2,182	1,248
Liabilities:
Debt, net	[2]	1,648	871
Non-recourse debt, net	[2]	$ 102	$ 732

[1] Carrying amount net of allowance for financing receivables losses.

[2] Carrying amount net of unamortized deferred financing costs and discount.