Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

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Intangible Assets

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INTANGIBLE ASSETS - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Intangible Assets [Line Items]
Depreciation and amortization of intangibles		$ 146	$ 123	$ 141
Exchange & Third-Party Management
Intangible Assets [Line Items]
Impairment	$ (18)
ILG, Inc And Welk
Intangible Assets [Line Items]
Depreciation and amortization of intangibles		61	$ 57	$ 59
Expected amortization expense, 2021		62
Expected amortization expense, 2022		62
Expected amortization expense, 2023		62
Expected amortization expense, 2024		62
Expected amortization expense, 2025		$ 62
Minimum \| ILG, Inc And Welk
Intangible Assets [Line Items]
Estimated useful life		15 years
Maximum \| ILG, Inc And Welk
Intangible Assets [Line Items]
Estimated useful life		25 years