Timeshare Financing Receivables - Details the Origination Year of Gross Timeshare Financing Receivables by average FICO Score (Details) - USD ($) $ in Millions		Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		$ 1,229	$ 1,340
More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		669	818
600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		291	292
Less than 600
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		51	39
No score
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables	[1]	218	$ 191
Year Of Origination 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		167
Year Of Origination 2020 | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		86
Year Of Origination 2020 | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		40
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	[1]	34
Year Of Origination 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		106
Year Of Origination 2016 | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		61
Year Of Origination 2016 | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		23
Year Of Origination 2016 | Less than 600
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		4
Year Of Origination 2016 | No score
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables	[1]	18
Year Of Origination 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		383
Year Of Origination 2019 | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		209
Year Of Origination 2019 | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		91
Year Of Origination 2019 | Less than 600
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		16
Year Of Origination 2019 | No score
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables	[1]	67
Year Of Origination Prior
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		155
Year Of Origination Prior | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		80
Year Of Origination Prior | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		36
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]	32
Year Of Origination 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		255
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		62
Year Of Origination 2018 | Less than 600
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		11
Year Of Origination 2018 | No score
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables	[1]	40
Year Of Origination 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		163
Year Of Origination 2017 | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		91
Year Of Origination 2017 | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		39
Year Of Origination 2017 | Less than 600
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		6
Year Of Origination 2017 | No score
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables	[1]	$ 27

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