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ACCOUNTS RECEIVABLE AND OTHER FINANCIAL ASSETS - Summary of the Activity of the Allowance for Expected Credit Losses on Prepayments to Customers (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Contract With Customer, Asset, Prepayments To Customers, Allowance for Credit Loss [Abstract] |  |
Balance, beginning of year | $ 23 | $ 47
Provision charged to expense | 0 | (3)
Write-offs and adjustments | (2) | (1)
Balance, end of period | $ 21 | $ 43

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- Definition Contract With Customer, Asset, Prepayments To Customers, Allowance for Credit Loss + References No definition available. + Details
Name: | bkng_ContractWithCustomerAssetPrepaymentsToCustomersAllowanceForCreditLoss
Namespace Prefix: | bkng_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Contract With Customer, Asset, Prepayments To Customers, Allowance for Credit Loss + References No definition available. + Details
Name: | bkng_ContractWithCustomerAssetPrepaymentsToCustomersAllowanceForCreditLossRollForward
Namespace Prefix: | bkng_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Contract With Customer, Asset, Prepayments To Customers, Provision Charged To Expense + References No definition available. + Details
Name: | bkng_ContractWithCustomerAssetPrepaymentsToCustomersProvisionChargedToExpense
Namespace Prefix: | bkng_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Contract With Customer, Asset, Prepayments To Customers, Write-Offs + References No definition available. + Details
Name: | bkng_ContractWithCustomerAssetPrepaymentsToCustomersWriteOffs
Namespace Prefix: | bkng_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration