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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
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+ Details

Related Party Transactions - Narrative (Details) - Affiliate - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Nov. 30, 2021	Dec. 31, 2024	Dec. 31, 2023	Mar. 31, 2025
Commercial and Operating Agreements with Expedia
Related Party Transactions
Term of agreement	10 years
Transition Services Agreement with Expedia, Inc
Related Party Transactions
Optional services, term		18 months	3 years
Payable remaining in respect of loss contingency, paid				$ 3
Payable remaining in respect of loss contingency				7
Payable remaining in respect of loss contingency, payable				$ 4