Contract Assets and Service Fees Receivable, Net and Guarantee Receivables, Net - Schedule of Activities in the Allowance for Credit Losses (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Activities in the provision for credit losses
Beginning balances	¥ (160,342)	¥ (148,322)	¥ (54,058)
Provisions	(531,237)	(441,805)	(153,176)
Charge-offs	523,613	529,380	68,072
Recoveries from prior charge-offs	(79,335)	(33,162)	(9,160)
Ending balances	(247,301)	(160,342)	¥ (148,322)
ASC 326 \| Cumulative Effect Period Of Adoption Adjustment
Activities in the provision for credit losses
Beginning balances	¥ (66,433)
Ending balances		¥ (66,433)

Amount of allowance for credit loss on accounts receivable.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

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Balance Type:	credit
Period Type:	instant

- Definition

Amount of increase in allowance for credit loss on accounts receivable, from recovery.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Amount of direct write-downs of accounts receivable charged against the allowance.

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- Definition

Amount of expense (reversal of expense) for expected credit loss on accounts receivable.

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