Timeshare Financing Receivables - Past Due Financing Receivables (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Legacy-Diamond
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 877
Financing receivable, past due and current	1,254
Legacy-Diamond | 31 - 90 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	32
Legacy-Diamond | 91 - 120 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	13
Legacy-Diamond | 121 days and greater past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	332
Legacy-HGV
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,036	$ 1,048
Financing receivable, past due and current	1,151	1,185
Legacy-HGV | 31 - 90 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	12	20
Legacy-HGV | 91 - 120 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	3	8
Legacy-HGV | 121 days and greater past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	100	109
Securitized | Legacy-Diamond
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	565
Financing receivable, past due and current	606
Securitized | Legacy-Diamond | 31 - 90 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	18
Securitized | Legacy-Diamond | 91 - 120 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	8
Securitized | Legacy-Diamond | 121 days and greater past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	15
Securitized | Legacy-HGV
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	619	783
Financing receivable, past due and current	628	805
Securitized | Legacy-HGV | 31 - 90 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	5	11
Securitized | Legacy-HGV | 91 - 120 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	2	5
Securitized | Legacy-HGV | 121 days and greater past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	2	6
Unsecuritized | Legacy-Diamond
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	312
Financing receivable, past due and current	648
Unsecuritized | Legacy-Diamond | 31 - 90 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	14
Unsecuritized | Legacy-Diamond | 91 - 120 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	5
Unsecuritized | Legacy-Diamond | 121 days and greater past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	317
Unsecuritized | Legacy-HGV
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	417	265
Financing receivable, past due and current	523	380
Unsecuritized | Legacy-HGV | 31 - 90 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	7	9
Unsecuritized | Legacy-HGV | 91 - 120 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	1	3
Unsecuritized | Legacy-HGV | 121 days and greater past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, past due	$ 98	$ 103