Variable Interest Entities - Carrying Amount of Consolidated VIEs (Details) - USD ($) $ in Millions	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Cash and cash equivalents	$ 1,021		$ 498	$ 526
Net finance receivables	20,510		19,986
Allowance for finance receivable losses	2,392	$ 2,298	2,311	2,127	$ 2,071	$ 2,095
Restricted cash and restricted cash equivalents	532		461	534
Other assets	1,194		1,154	$ 1,089		$ 1,019	$ 1,075
Long-term debt	19,195		18,281
Consolidated VIEs
Variable Interest Entity [Line Items]
Cash and cash equivalents	2		2
Net finance receivables	11,807		10,432
Allowance for finance receivable losses	1,300		1,126
Restricted cash and restricted cash equivalents	505		442
Other assets	30		28
Long-term debt	10,643		9,361
Other liabilities	$ 23		$ 20