Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 230	$ 206
Marketable securities	700	803
Receivable from collaboration partners ($32 and $39 from a related party)	34	39
Prepaid expenses and other current assets	22	19
Total current assets	986	1,067
Long-term marketable securities	80	129
Property and equipment, net	45	35
Other noncurrent assets ($5 and $2 from a related party)	109	114
Total assets	1,220	1,345
Current liabilities:
Accounts payable	12	20
Deferred revenue ($103 and $97 to a related party)	103	97
Other current liabilities	65	76
Total current liabilities	180	193
Deferred revenue, noncurrent ($330 and $355 to a related party)	330	355
Other noncurrent liabilities	144	140
Commitments
Stockholders’ equity:
Preferred stock, $0.0001 par value per share; 10.0 shares authorized; no shares issued and outstanding		0
Common stock and additional paid-in capital: $0.0001 par value per share; 400.0 shares authorized; 74.5 shares in 2023 and 72.9 shares in 2022 issued and outstanding	1,267	1,206
Accumulated deficit	(697)	(542)
Accumulated other comprehensive loss	(4)	(7)
Total stockholders’ equity	566	657
Total liabilities and stockholders’ equity	$ 1,220	$ 1,345