Parent Company Only Financial Information - Condensed Statements of Condition (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
ASSETS:
Cash and cash equivalents	$ 2,032	$ 2,211	[1]	$ 1,948	[1]	$ 742	[1]
Other assets	2,250	1,367
Total assets	90,144	59,527
LIABILITIES AND STOCKHOLDERS’ EQUITY:
Junior subordinated debentures	575	361
Other liabilities	1,267	862
Total liabilities	81,320	52,483
Stockholders’ equity	8,824	7,044		6,842		6,712
Total liabilities and stockholders’ equity	90,144	59,527
Parent Company
ASSETS:
Cash and cash equivalents	121	139		$ 151		$ 183
Investments in subsidiaries	9,633	7,525
Other assets	85	48
Total assets	9,839	7,712
LIABILITIES AND STOCKHOLDERS’ EQUITY:
Junior subordinated debentures	575	361
Subordinated notes	432	296
Other liabilities	8	11
Total liabilities	1,015	668
Stockholders’ equity	8,824	7,044
Total liabilities and stockholders’ equity	$ 9,839	$ 7,712

[1] For further information on restricted cash, see Note 14 - Derivatives and Hedging Activities.