REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Revenues	$ 4,415	$ 3,778
Online accommodation reservation services | Revenue Benchmark | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk percentage	89.00%	88.00%
Other sources of online travel reservation services and advertising and other revenues | Revenue Benchmark | Product Concentration Risk | Maximum
Disaggregation of Revenue [Line Items]
Concentration risk percentage	10.00%	10.00%
United States
Disaggregation of Revenue [Line Items]
Revenues	$ 557	$ 523
The Netherlands
Disaggregation of Revenue [Line Items]
Revenues	3,339	2,859
Other
Disaggregation of Revenue [Line Items]
Revenues	$ 519	$ 396