Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 127	$ 206
Marketable securities	632	803
Receivable from collaboration partners ($20 and $39 from a related party)	38	39
Prepaid expenses and other current assets	34	19
Total current assets	831	1,067
Long-term marketable securities	107	129
Property and equipment, net	51	35
Other noncurrent assets ($6 and $2 from a related party)	106	114
Total assets	1,095	1,345
Current liabilities:
Accounts payable	17	20
Deferred revenue ($84 and $97 to a related party)	91	97
Other current liabilities	76	76
Total current liabilities	184	193
Deferred revenue, noncurrent ($291 and $355 to a related party)	307	355
Other noncurrent liabilities	142	140
Commitments
Stockholders’ equity:
Common stock and additional paid-in capital: $0.0001 par value per share; 400.0 shares authorized; 75.5 shares in 2023 and 72.9 shares in 2022 issued and outstanding	1,311	1,206
Accumulated deficit	(849)	(542)
Accumulated other comprehensive loss	0	(7)
Total stockholders’ equity	462	657
Total liabilities and stockholders’ equity	$ 1,095	$ 1,345