Nature of Operations and Summary of Significant Accounting Policies - Reconciliation of Cash (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Accounting Policies [Abstract]
Cash and cash equivalents	$ 732	$ 703	$ 590	$ 483
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents	32	26	4	52
Restricted cash	7	6	16	10
Restricted cash included in Other assets	0	0	7	7
Cash, cash equivalents and restricted cash	$ 771	$ 735	$ 617	$ 552