XML 40 R28.htm IDEA: XBRL DOCUMENT
v3.26.1

Right-of-Use Assets and Liabilities (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2026
Leases [Abstract] |
Schedule of Components of Lease Expense | The components of lease expense were as follows:
| Three Months Ended March 31, |  |
(dollars in millions) | 2026 |  | 2025 |  |  |  |
Operating lease cost | $ | 0.6 |  |  | $ | 0.7 |  |  |  |  |
Schedule of Supplemental Cash Flow Information Related to Leases | Supplemental cash flow information related to leases was as follows:
| Three Months Ended March 31,
(dollars in millions) | 2026 |  | 2025
Cash paid for amounts included in the measurement of lease liabilities: |  |  |
Operating cash flows from operating leases | $ | 0.4 |  |  | $ | 0.5 |
Supplemental non-cash information: |  |  |
Right-of-use assets obtained in exchange for new lease obligations | $ | — |  |  | $ | 1.5 |
Schedule of Maturities of Operating Lease Liabilities | Maturities of operating lease liabilities as of March 31, 2026, were as follows:
(dollars in millions) |
Remainder of 2026 | $ | 1.7 |
2027 | 2.4 |
2028 | 2.5 |
2029 | 2.6 |
2030 | — |
Total lease payments | 9.2 |
Less: imputed interest | (1.1) |
Total | $ | 8.1 |

X
- Definition Supplemental cash flow information related to leases. + References No definition available. + Details
Name: | arvn_ScheduleOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock
Namespace Prefix: | arvn_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
Name: | us-gaap_LeaseCostTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
Name: | us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration