Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025	Jun. 30, 2025	Dec. 31, 2024
Cash, Cash Equivalents and Restricted Cash [Abstract]
Cash and cash equivalents	$ 246	$ 969
Restricted cash	99	276
Total cash, cash equivalents and restricted cash shown in the Unaudited Condensed Statements of Consolidated Cash Flows	$ 345	$ 1,245	$ 1,096	$ 838