Restricted Cash, Other Restricted Assets and Intercompany Funds Transfers (Details) - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2023	Dec. 31, 2021
Restricted Cash and Cash Equivalents Items [Line Items]
Total restricted cash	$ 26.8		$ 19.7
Cash and securities pledged with clearing organizations for benefit of customers	42.4		47.5
Fair value of securities restricted in relation to customer activity	$ 31.7		30.0
Disclosure of Restrictions on Dividends, Loans and Advances Disclosure [Abstract]
Percentage of total capital loans limited to	10.00%
Percentage of total capital (limited to) for aggregate covered transactions	20.00%
Deposits with banks
Restricted Cash and Cash Equivalents Items [Line Items]
Total restricted cash	$ 25.4		18.4
Cash and due from banks
Restricted Cash and Cash Equivalents Items [Line Items]
Total restricted cash	1.4		1.3
Segregated for the benefit of securities and cleared derivative customers
Restricted Cash and Cash Equivalents Items [Line Items]
Total restricted cash	18.7		14.6
Cash reserves at non-U.S. central banks and held for other general purposes
Restricted Cash and Cash Equivalents Items [Line Items]
Total restricted cash	$ 8.1		$ 5.1
Bank and Bank Holding Company Subsidiaries | Subsequent Event
Disclosure of Restrictions on Dividends, Loans and Advances Disclosure [Abstract]
Aggregate dividends payable		$ 34.0