Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 185	$ 127
Marketable securities	810	632
Receivable from collaboration partners ($21 and $20 from a related party)	35	38
Prepaid expenses and other current assets	34	34
Total current assets	1,064	831
Long-term marketable securities	100	107
Property and equipment, net	51	51
Other noncurrent assets ($— and $6 from a related party)	78	106
Total assets	1,293	1,095
Current liabilities:
Accounts payable	16	17
Deferred revenue ($112 and $84 to a related party)	124	91
Other current liabilities	64	76
Total current liabilities	204	184
Deferred revenue, noncurrent ($209 and $291 to a related party)	242	307
Other noncurrent liabilities	140	142
Commitments
Stockholders’ equity:
Common stock and additional paid-in capital: $0.0001 par value per share; 400.0 shares authorized; 90.9 shares in 2024 and 75.5 shares in 2023 issued and outstanding	1,561	1,311
Accumulated deficit	(853)	(849)
Accumulated other comprehensive loss	(1)	0
Total stockholders’ equity	707	462
Total liabilities and stockholders’ equity	$ 1,293	$ 1,095