Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 81.3	$ 108.3
Restricted cash	5.5	4.5
Marketable securities	1,124.0	1,394.3
Accounts receivable	1.0	15.0
Other receivables	7.0	10.7
Prepaid expenses and other current assets	21.4	19.7
Total current assets	1,240.2	1,552.5
Property, equipment and leasehold improvements, net	13.4	12.7
Operating lease right of use assets	4.4	3.9
Collaboration contract asset and other assets	10.8	12.5
Total assets	1,268.8	1,581.6
Current liabilities:
Accounts payable and accrued liabilities	74.7	54.4
Deferred revenue	218.6	206.2
Current portion of operating lease liability	1.8	1.1
Total current liabilities	295.1	261.7
Deferred revenue	405.1	534.3
Long term debt	1.0	1.0
Operating lease liability	2.7	2.9
Total liabilities	703.9	799.9
Commitments and contingencies
Stockholders' equity:
Common stock, $0.001 par value, 53.2 and 53.0 shares issued and outstanding as of December 31, 2022 and 2021, respectively	0.1	0.0
Accumulated deficit	(965.4)	(682.9)
Additional paid-in capital	1,549.4	1,469.2
Accumulated other comprehensive loss	(19.2)	(4.6)
Total stockholders' equity	564.9	781.7
Total liabilities and stockholders' equity	$ 1,268.8	$ 1,581.6

Collaboration Contract Asset And Other Assets

No definition available.

Name:	arvn_CollaborationContractAssetAndOtherAssets
Namespace Prefix:	arvn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.