Equity method investment, income or loss recorded term.

No definition available.

Name:	kdny_EquityMethodInvestmentIncomeOrLossRecordedTerm
Namespace Prefix:	kdny_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Equity method investments initial capitalization by investors.

+ References

No definition available.

+ Details

Name:	kdny_EquityMethodInvestmentsInitialCapitalizationByInvestors
Namespace Prefix:	kdny_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage of net proceeds received from transaction of liquidation event.

+ References

No definition available.

+ Details

Name:	kdny_PercentageOfNetProceedsReceivedFromTransactionOfLiquidationEvent
Namespace Prefix:	kdny_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585

+ Details

Name:	us-gaap_ProceedsFromSaleOfEquityMethodInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=kdny_SairopaBVMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=kdny_CVRAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Equity Method Investment - Additional Information (Details) - Sairopa B.V. € in Millions, $ in Millions	1 Months Ended	3 Months Ended
	Apr. 30, 2021 USD ($)	Mar. 31, 2022	Apr. 30, 2021 EUR (€)
Schedule Of Equity Method Investments [Line Items]
Equity method investment, ownership percentage		44.00%
Equity method investment, initial capitalization \| €			€ 12.5
Equity method investment, recorded \| $	$ 10.0
Equity method investment, income or loss recorded term		one quarter lag
CVR Agreement
Schedule Of Equity Method Investments [Line Items]
Percentage of net proceeds received from transaction of liquidation event	50.00%