REVENUES - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Revenues	$ 7,994	$ 7,341	$ 18,268	$ 16,581
Online accommodation reservation services | Revenue Benchmark | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk percentage	90.00%	89.00%	90.00%	89.00%
U.S.
Disaggregation of Revenue [Line Items]
Revenues	$ 662	$ 633	$ 1,857	$ 1,771
The Netherlands
Disaggregation of Revenue [Line Items]
Revenues	6,614	6,127	14,416	13,326
Other
Disaggregation of Revenue [Line Items]
Revenues	$ 718	$ 581	$ 1,995	$ 1,484