v3.26.1

Recent Transactions and Developments -Schedule of Calculation of Gain (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2023	Dec. 14, 2023
Asset Acquisition [Line Items]
Gain on sale of Telavant net assets	$ 0	$ 110,387	$ 5,348,410
Roche Transaction
Asset Acquisition [Line Items]
Upfront cash payment				$ 7,100,000	$ 7,100,000
Roche Transaction \| RSL
Asset Acquisition [Line Items]
Upfront cash payment			5,234,373		$ 5,200,000
Carrying amount of noncontrolling interest derecognized			87,500
Total consideration			5,321,873
Assets sold			3,253
Liabilities transferred			29,790
Net liabilities sold			(26,537)
Gain on sale of Telavant net assets			$ 5,348,410

Amount of consideration received for sale of assets.

+ References

No definition available.

+ Details

Name:	roiv_ConsiderationReceivedForSaleOfAssets
Namespace Prefix:	roiv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount classified as assets attributable to disposal group held for sale.

+ References

No definition available.

+ Details

Name:	roiv_DisposalGroupAssets
Namespace Prefix:	roiv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount classified as liabilities attributable to disposal group held for sale.

+ References

No definition available.

+ Details

Name:	roiv_DisposalGroupLiabilities
Namespace Prefix:	roiv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount classified as net assets (liabilities) attributable to disposal group held for sale.

+ References

No definition available.

+ Details

Name:	roiv_DisposalGroupNetAssetsLiabilities
Namespace Prefix:	roiv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The carrying amount of noncontrolling interest derecognized attributable to disposal group held for sale.

+ References

No definition available.

+ Details

Name:	roiv_DisposalGroupNoncontrollingInterestDerecognizedValue
Namespace Prefix:	roiv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of gain (loss) on sale of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

+ References

No definition available.

+ Details

Name:	roiv_GainLossOnSaleOfAssets
Namespace Prefix:	roiv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of upfront cash payment received for sale of assets.

+ References

No definition available.

+ Details

Name:	roiv_UpfrontCashPaymentReceivedForSaleOfAssets
Namespace Prefix:	roiv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-4

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 15
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480123/805-50-15-3

+ Details

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

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=roiv_RocheTransactionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=roiv_RSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Roivant Sciences Ltd. 10-K