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REVENUE RECOGNITION - Schedule of Changes in Deferred Revenue (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2024 USD ($)
Contract with Customer, Liability [Roll Forward]
Deferred revenue as of December 31, 2023	$ 724,229
Amounts deferred during the period	368,602
Revenue recognized from amounts included in the deferred revenue beginning balance	(270,740)
Revenue from current period sales	(119,453)
Deferred revenue as of June 30, 2024	$ 702,638

X

- Definition

Contract with Customer, Liability, Current Period Sales

+ References

No definition available.

+ Details

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Namespace Prefix:	up_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- Definition

Contract with Customer, Liability, Deferred During Current Period

+ References

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Namespace Prefix:	up_
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- Definition

Contract with Customer, Liability

+ References

No definition available.

+ Details

Name:	up_ContractWithCustomerLiabilityRollForward
Namespace Prefix:	up_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479837/606-10-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-8

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479837/606-10-45-2

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Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-8

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