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REVENUE RECOGNITION - Changes in Deferred Revenue (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)
Contract with Customer, Liability [Roll Forward]
Deferred revenue as of December 31, 2022	$ 1,076,875
Amounts deferred during the period	173,226
Revenue recognized from amounts included in the deferred revenue beginning balance	(219,462)
Revenue from current period sales	(53,212)
Deferred revenue as of March 31, 2023	$ 977,427

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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- Definition

Contract with Customer, Liability

+ References

No definition available.

+ Details

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=126919976&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130549-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=126919976&loc=SL49130532-203044

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- 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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130549-203045

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