Timeshare Financing Receivables - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2021	Dec. 31, 2020
Accounts Notes And Loans Receivable [Line Items]
Decrease in Variable Consideration	$ (77)
Timeshare financing receivable not accruing interest	$ 103	$ 117
Originated
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, average interest rate (as a percent)	13.02%
Financing receivable, weighted average remaining term (in years)	7 years 8 months 12 days
Financing receivable weighted average maturities year	2036
Interest receivable outstanding	$ 8	7
Acquired
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, weighted average interest rate (as a percent)	15.57%
Financing receivable, weighted average remaining term (in years)	8 years 3 months 18 days
Financing receivable weighted average maturities year	2036
Interest receivable outstanding	$ 7
Legacy-Diamond
Accounts Notes And Loans Receivable [Line Items]
Timeshare financing receivable not accruing interest	$ 345
Minimum \| Originated
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, stated interest rate (as a percent)	1.00%
Minimum \| Acquired
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, stated interest rate (as a percent)	1.00%
Maximum \| Originated
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, stated interest rate (as a percent)	25.00%
Maximum \| Acquired
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, stated interest rate (as a percent)	25.00%
Non-recourse Debt
Accounts Notes And Loans Receivable [Line Items]
Gross timeshare receivables securing the Timeshare Facility	$ 97	$ 17

Financing receivable weighted average maturities year.

No definition available.

Name:	hgv_FinancingReceivableWeightedAverageMaturitiesYear
Namespace Prefix:	hgv_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

- Definition

Financing Receivable, Weighted Average Remaining Term

+ References

No definition available.

+ Details

Name:	hgv_FinancingReceivableWeightedAverageRemainingTerm
Namespace Prefix:	hgv_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Increase (Decrease) Adjustment to Variable Consideration.

+ References

No definition available.

+ Details

Name:	hgv_IncreaseDecreaseInVariableConsideration
Namespace Prefix:	hgv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Timesharing transactions average interest rate for notes receivable.

+ References

No definition available.

+ Details

Name:	hgv_TimesharingTransactionsAverageInterestRateForNotesReceivable
Namespace Prefix:	hgv_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Time-sharing Transactions, Weighted Average Interest Rate for Notes Receivable

+ References

No definition available.

+ Details

Name:	hgv_TimesharingTransactionsWeightedAverageInterestRateforNotesReceivable
Namespace Prefix:	hgv_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.8)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_InterestReceivable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5086-111524

+ Details

Name:	us-gaap_LoansPledgedAsCollateral
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The receivable or note face amount less the unamortized discount or premium.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28541-108399

+ Details

Name:	us-gaap_ReceivableWithImputedInterestNetAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Stated interest rate of notes receivable from time-sharing transactions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 978
-SubTopic 310
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=68077313&loc=d3e27327-108691

+ Details

Name:	us-gaap_TimesharingTransactionsStatedInterestRateForNotesReceivable
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_CreditLossStatusAxis=us-gaap_FinancialAssetOriginatedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditLossStatusAxis=hgv_FinancialAssetAcquiredMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=hgv_LegacyDiamondMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: