REVENUES - Disaggregation of Revenue (Details) - Revenue Benchmark - Product Concentration Risk	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Online accommodation reservation services
Disaggregation of Revenue [Line Items]
Concentration risk percentage	90.00%	90.00%	89.00%	90.00%
Other sources of online travel reservation services or advertising and other revenues \| Maximum
Disaggregation of Revenue [Line Items]
Concentration risk percentage	10.00%	10.00%	10.00%	10.00%

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.

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/exampleRef
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Reference 6: http://www.xbrl.org/2003/role/exampleRef
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-Topic 606
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Reference 9: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
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+ Details

Booking Holdings Inc. 10-Q