SHARE-BASED COMPENSATION - Additional Information (Details) - $ / shares	3 Months Ended
Mar. 31, 2020	May 20, 2020
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for issuance under the plan (in shares)	6,000,000
Shares available for grants under the plan (in shares) (less than)	1,000,000
Restricted stock units \| Employees and Non Employee Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards, grants in period (in shares)	248,172
Stock awards granted, weighted average (in usd per share) grant date fair value	$ 91.08
Performance-based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum amount of RSU subject to vesting (in shares)	177,208
SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards, grants in period (in shares)	116,434
Stock awards granted, weighted average (in usd per share) grant date fair value	$ 29.63
Stock awards granted, weighted average (in usd per share) exercise date fair value	$ 96.82
Legacy-ILG \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grants under the plan (in shares) (less than)	1,000,000
Subsequent Event \| Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grants under the plan (in shares) (less than)		2,000,000

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- 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.

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- Definition

Number of shares authorized for issuance under share-based payment arrangement.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

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- Definition

Maximum amount of Restricted Stock Units that may vest under performance-based vesting criteria.

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