Nature of Operations and Summary of Significant Accounting Policies - Reconciliation of Cash (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Cash and cash equivalents	$ 590	$ 483	$ 657	$ 711
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents	4	52	0	0
Restricted cash	16	10	4	4
Restricted cash included in Other assets	7	7	1	1
Cash, cash equivalents and restricted cash	$ 617	$ 552	$ 662	$ 716