Nominal or face amount used to calculate payments on the derivative asset.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 5
-Subparagraph (SX 210.12-13(Column A)(Footnote 3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-5

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 5C
-Subparagraph (SX 210.12-13C(Column E))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-5C

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 5A
-Subparagraph (SX 210.12-13A(Column D))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-5A

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 5B
-Subparagraph (SX 210.12-13B(Column B))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-5B

Name:	us-gaap_DerivativeAssetNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

Summary of Significant Accounting Policies (Details) $ in Millions		6 Months Ended
	Mar. 23, 2026	Jun. 30, 2026 USD ($)	Aug. 07, 2026 USD ($)
Entity Information [Line Items]
Fee deposits, percentage (as a percent)	0.05	0.05
Credit Card Program Agreement
Entity Information [Line Items]
Outstanding credit card principal balance		$ 375
Credit Card Program Agreement \| Minimum \| Subsequent Event
Entity Information [Line Items]
Outstanding credit card principal balance			$ 100
Credit Card Program Agreement \| Maximum \| Subsequent Event
Entity Information [Line Items]
Outstanding credit card principal balance			$ 275
Prosper Allocations \| Credit Card Program Agreement
Entity Information [Line Items]
Revised allocation of customer accounts		95.00%
Coastal Allocations \| Credit Card Program Agreement
Entity Information [Line Items]
Revised allocation of customer accounts		5.00%
Coastal Allocations \| Credit Card Program Agreement \| Minimum
Entity Information [Line Items]
Revised allocation of customer accounts		0.00%
Coastal Allocations \| Credit Card Program Agreement \| Maximum
Entity Information [Line Items]
Revised allocation of customer accounts		5.00%
Prosper Funding LLC
Entity Information [Line Items]
Fee deposits, percentage (as a percent)		0.05