Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 184	$ 206
Marketable securities	615	803
Receivable from collaboration partners ($22 and $39 from a related party)	52	39
Prepaid expenses and other current assets	31	19
Total current assets	882	1,067
Long-term marketable securities	151	129
Property and equipment, net	50	35
Other noncurrent assets ($6 and $2 from a related party)	108	114
Total assets	1,191	1,345
Current liabilities:
Accounts payable	17	20
Deferred revenue ($96 and $97 to a related party)	103	97
Other current liabilities	80	76
Total current liabilities	200	193
Deferred revenue, noncurrent ($309 and $355 to a related party)	326	355
Other noncurrent liabilities	145	140
Commitments
Stockholders’ equity:
Preferred stock, $0.0001 par value per share; 10.0 shares authorized; no shares issued and outstanding.	0	0
Common stock and additional paid-in capital: $0.0001 par value per share; 400.0 shares authorized; 74.8 shares in 2023 and 72.9 shares in 2022 issued and outstanding	1,291	1,206
Accumulated deficit	(768)	(542)
Accumulated other comprehensive loss	(3)	(7)
Total stockholders’ equity	520	657
Total liabilities and stockholders’ equity	$ 1,191	$ 1,345