Cash, Cash Equivalents and Marketable Securities - Summary of Fair Values of Our Cash, Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Cash, Cash Equivalents and Marketable Securities [Abstract]
Cash and cash equivalents	$ 238	$ 150
Marketable securities	593	828
Long-term marketable securities	10	14
Total cash, cash equivalents and marketable securities	$ 841	$ 992