Timeshare Financing Receivables - Details the Origination Year of Gross Timeshare Financing Receivables Balances by Average FICO Score (Details) - USD ($) $ in Millions		Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		$ 1,130	$ 1,185
More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		675	711
600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		251	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]	169	$ 172
Year Of Origination 2021
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		155
Year Of Origination 2021 | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		97
Year Of Origination 2021 | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		31
Year Of Origination 2021 | Less than 600
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		4
Year Of Origination 2021 | No score
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables	[2]	23
Year Of Origination 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		124
Year Of Origination 2017 | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		78
Year Of Origination 2017 | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		28
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	[2]	14
Year Of Origination 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		175
Year Of Origination 2020 | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		101
Year Of Origination 2020 | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		39
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	[2]	29
Year Of Origination Prior
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		188
Year Of Origination Prior | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		105
Year Of Origination Prior | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		44
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	[2]	32
Year Of Origination 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		293
Year Of Origination 2019 | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		176
Year Of Origination 2019 | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		66
Year Of Origination 2019 | Less than 600
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		9
Year Of Origination 2019 | No score
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables	[2]	42
Year Of Origination 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		195
Year Of Origination 2018 | More than 700
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		118
Year Of Origination 2018 | 600-699
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		43
Year Of Origination 2018 | Less than 600
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables		5
Year Of Origination 2018 | No score
Financing Receivable, Recorded Investment, Past Due [Line Items]
Timeshare financing receivables	[2]	$ 29

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

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