Timeshare Financing Receivables - Details the Gross Timeshare Financing Receivables Balances by Average FICO Score (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		$ 1,185	$ 1,340
More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		711	818
600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		266	292
Less than 600
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		36	39
No score
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables	[1]	172	$ 191
Year Of Origination 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		214
Year Of Origination 2020 | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		128
Year Of Origination 2020 | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		46
Year Of Origination 2020 | Less than 600
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		7
Year Of Origination 2020 | No score
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		33
Year Of Origination 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		353
Year Of Origination 2019 | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		214
Year Of Origination 2019 | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		78
Year Of Origination 2019 | Less than 600
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		11
Year Of Origination 2019 | No score
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		50
Year Of Origination 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		233
Year Of Origination 2018 | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		142
Year Of Origination 2018 | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		52
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		33
Year Of Origination 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		150
Year Of Origination 2017 | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		95
Year Of Origination 2017 | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		34
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		17
Year Of Origination 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		97
Year Of Origination 2016 | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		60
Year Of Origination 2016 | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		22
Year Of Origination 2016 | Less than 600
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		3
Year Of Origination 2016 | No score
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		12
Year Of Origination Prior
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		138
Year Of Origination Prior | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		72
Year Of Origination Prior | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		34
Year Of Origination Prior | Less than 600
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		5
Year Of Origination Prior | No score
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		$ 27

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