Income Taxes - Schedule of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at December 31, 2021		$ 31
Effect of CIT Merger		6
Additions for tax positions related to prior years		1
Reductions for tax positions of prior years		(2)
Expiration of statutes of limitations		(1)
Settlements	$ (5)
Balance at December 31, 2022	30
Liabilities for Unrecognized Tax Benefits
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at December 31, 2021		30
Effect of CIT Merger		4
Additions for tax positions related to prior years		1
Reductions for tax positions of prior years		(2)
Expiration of statutes of limitations		(1)
Settlements	(5)
Balance at December 31, 2022	27
Interest / Penalties
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at December 31, 2021		1
Effect of CIT Merger		2
Additions for tax positions related to prior years		0
Reductions for tax positions of prior years		0
Expiration of statutes of limitations		$ 0
Settlements	0
Balance at December 31, 2022	$ 3