Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 238	$ 206
Marketable securities	716	803
Receivable from collaboration partners ($33 and $39 from a related party)	33	39
Prepaid expenses and other current assets	28	19
Total current assets	1,015	1,067
Long-term marketable securities	90	129
Property and equipment, net	37	35
Other noncurrent assets ($3 and $2 from a related party)	112	114
Total assets	1,254	1,345
Current liabilities:
Accounts payable	28	20
Deferred revenue ($97 and $97 to a related party)	97	97
Other current liabilities	54	76
Total current liabilities	179	193
Deferred revenue, noncurrent ($330 and $355 to a related party)	330	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; 73.1 shares in 2023 and 72.9 shares in 2022 issued and outstanding	1,226	1,206
Accumulated deficit	(622)	(542)
Accumulated other comprehensive loss	(4)	(7)
Total stockholders’ equity	600	657
Total liabilities and stockholders’ equity	$ 1,254	$ 1,345