For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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BUSINESS SEGMENTS - Additional Information (Details)	12 Months Ended
BUSINESS SEGMENTS - Additional Information (Details)	Dec. 31, 2020 brand Segment	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Disclosure
Number of reportable business segments \| Segment	2
Geographic Concentration Risk \| Sales revenue, net \| Non-US
Segment Reporting Disclosure
Concentration risk, percentage	10.00%	11.00%	13.00%
Vacation Ownership
Segment Reporting Disclosure
Number of vacation ownership brands \| brand	7