Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities - Schedule of Reconciliation of Cash and Cash Equivalents and Restricted Cash Inclusive of Fiduciary Cash (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Supplemental Cash Flow Elements [Abstract]
Cash and cash equivalents	$ 1,079	$ 675	$ 700
Fiduciary cash	2,471	1,827	1,603
Restricted cash	265
Total cash, cash equivalents and restricted cash inclusive of fiduciary cash at the end of the period	$ 3,815	$ 2,502	$ 2,303	$ 2,033