Long-Term Debt - Summary of Long-Term Debt Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Debt Disclosure [Abstract]
Long-term debt, non-current (Contractual maturity 2029)	$ 100	$ 50
Unamortized discounts, issuance costs and payment-in-kind interest, net	(2)	(2)
Total long-term debt	$ 98	$ 48