Income Taxes - Affordable Housing Tax Credits (Details) - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Tax credit and other tax benefits	$ 1.8	$ 1.7	$ 1.5
Amount of amortization reported in income tax expense	1.4	1.3	$ 1.2
Carrying value of investments, reported in other assets	12.1	10.8
Amount of commitments, reported in account payable and other liabilities	$ 5.4	$ 4.6