Derivative Financial Instruments - Balance Sheet Offsetting, Assets (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Derivative Assets
Gross Amounts of Recognized Assets	$ 377	$ 288
Gross Amounts offset in the Statement of Financial Position	0	0
Net Amounts of Assets Presented in the Statement of Financial Position	377	288
Financial Instruments (Collateral)	(95)	(169)
Cash Collateral Received	(153)	(60)
Net Amount	129	59
Reverse repurchase, securities borrowing, and similar arrangements
Gross Amounts of Recognized Assets	544	607
Gross Amounts offset in the Statement of Financial Position	0	0
Net Amounts of Assets Presented in the Statement of Financial Position	544	607
Financial Instruments (Collateral)	(544)	(607)
Cash Collateral Received	0	0
Net Amount	0	0
Total
Gross Amounts of Recognized Assets	921	895
Gross Amounts offset in the Statement of Financial Position	0	0
Net Amounts of Assets Presented in the Statement of Financial Position	921	895
Financial Instruments (Collateral)	(639)	(776)
Cash Collateral Received	(153)	(60)
Net Amount	129	59
Foreign exchange contracts
Derivative Assets
Gross Amounts of Recognized Assets	272	162
Gross Amounts offset in the Statement of Financial Position	0	0
Net Amounts of Assets Presented in the Statement of Financial Position	272	162
Derivative Asset, Not Offset, Policy Election Deduction	(73)	(77)
Cash Collateral Received	(75)	(32)
Net Amount	124	53
Total return swaps
Derivative Assets
Gross Amounts of Recognized Assets	27
Gross Amounts offset in the Statement of Financial Position	0
Net Amounts of Assets Presented in the Statement of Financial Position	27
Derivative Asset, Not Offset, Policy Election Deduction	0
Cash Collateral Received	(26)
Net Amount	1
Client foreign currency options
Derivative Assets
Gross Amounts of Recognized Assets	8	9
Gross Amounts offset in the Statement of Financial Position	0	0
Net Amounts of Assets Presented in the Statement of Financial Position	8	9
Derivative Asset, Not Offset, Policy Election Deduction	0	(1)
Cash Collateral Received	(4)	(7)
Net Amount	4	1
Client interest rate derivatives
Derivative Assets
Gross Amounts of Recognized Assets	70	99
Gross Amounts offset in the Statement of Financial Position	0	0
Net Amounts of Assets Presented in the Statement of Financial Position	70	99
Derivative Asset, Not Offset, Policy Election Deduction	(22)	(91)
Cash Collateral Received	(48)	(8)
Net Amount	$ 0	0
Interest rate swaps
Derivative Assets
Gross Amounts of Recognized Assets		18
Gross Amounts offset in the Statement of Financial Position		0
Net Amounts of Assets Presented in the Statement of Financial Position		18
Derivative Asset, Not Offset, Policy Election Deduction		0
Cash Collateral Received		(13)
Net Amount		$ 5