Nature of Operations and Summary of Significant Accounting Policies - Reconciliation of Cash (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Cash and cash equivalents	$ 638	$ 483	$ 569	$ 711
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents	3	52	49	0
Restricted cash	11	10	4	4
Restricted cash included in Other assets	0	7	0	1
Cash, cash equivalents and restricted cash	$ 652	$ 552	$ 622	$ 716