Timeshare Financing Receivables - Details the Origination Year of Gross Timeshare Financing Receivables Balances by Average FICO Score (Details) - USD ($) $ in Millions		Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		$ 1,147	$ 1,185
More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		685	711
600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		256	266
Less than 600
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		35	36
No score
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables	[1]	171	$ 172
Year Of Origination 2021
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		70
Year Of Origination 2021 | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		42
Year Of Origination 2021 | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		13
Year Of Origination 2021 | Less than 600
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		2
Year Of Origination 2021 | No score
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables	[1]	13
Year Of Origination 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		135
Year Of Origination 2017 | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		85
Year Of Origination 2017 | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		30
Year Of Origination 2017 | Less than 600
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		4
Year Of Origination 2017 | No score
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables	[1]	16
Year Of Origination 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		195
Year Of Origination 2020 | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		114
Year Of Origination 2020 | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		43
Year Of Origination 2020 | Less than 600
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		6
Year Of Origination 2020 | No score
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables	[1]	32
Year Of Origination Prior
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		210
Year Of Origination Prior | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		118
Year Of Origination Prior | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		50
Year Of Origination Prior | Less than 600
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		7
Year Of Origination Prior | No score
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables	[1]	35
Year Of Origination 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		323
Year Of Origination 2019 | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		196
Year Of Origination 2019 | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		72
Year Of Origination 2019 | Less than 600
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		10
Year Of Origination 2019 | No score
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables	[1]	45
Year Of Origination 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		214
Year Of Origination 2018 | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		130
Year Of Origination 2018 | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		48
Year Of Origination 2018 | Less than 600
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		6
Year Of Origination 2018 | No score
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables	[1]	$ 30

[1] Timeshare financing receivables without a FICO score are primarily related to foreign borrowers.