Income Taxes - Net Deferred Tax Position (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Allowance for credit losses	$ 175	$ 172
Unrealized losses on cash flow hedges	86	129
Accrued expenses	127	66
Interests in real estate mortgage investment conduits	104	109
Unrealized losses on investment securities	574	740
Capitalized costs	299	310
Lease liabilities	123	55
Other	154	172
Total deferred tax assets	1,642	1,753
Deferred tax liabilities:
Lease ROU assets	109	34
Amortization of intangible assets	24	23
Fair value adjustments	28	32
Other	29	51
Total deferred tax liabilities	190	140
Net deferred tax asset	$ 1,452	$ 1,613