Offsetting Arrangements - Repo, Sec Lending Transactions Maturity by Category (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	$ 101,801	$ 75,266
Securities lending transactions	9,852	7,408
Gross amount of recognized liabilities for repurchase agreements and securities lending	111,653	82,674
U.S. Treasury and agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	101,099	75,266
Securities lending transactions	44	0
Non-US sovereign debt
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	702	0
Corporate debt securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	67	92
Equity securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	6,115	7,315
Other
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	3,626	1
Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	101,601	75,266
Securities lending transactions	8,246	6,057
Gross amount of recognized liabilities for repurchase agreements and securities lending	109,847	81,323
Overnight and Continuous | U.S. Treasury and agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	100,899	75,266
Securities lending transactions	44	0
Overnight and Continuous | Non-US sovereign debt
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	702	0
Overnight and Continuous | Corporate debt securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	67	92
Overnight and Continuous | Equity securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	4,509	5,964
Overnight and Continuous | Other
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	3,626	1
Up to 30 Days
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	0	0
Securities lending transactions	0	24
Gross amount of recognized liabilities for repurchase agreements and securities lending	0	24
Up to 30 Days | U.S. Treasury and agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	0	0
Securities lending transactions	0	0
Up to 30 Days | Non-US sovereign debt
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	0	0
Up to 30 Days | Corporate debt securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	0	0
Up to 30 Days | Equity securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	0	24
Up to 30 Days | Other
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	0	0
30-90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	200	0
Securities lending transactions	0	11
Gross amount of recognized liabilities for repurchase agreements and securities lending	200	11
30-90 Days | U.S. Treasury and agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	200	0
Securities lending transactions	0	0
30-90 Days | Non-US sovereign debt
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	0	0
30-90 Days | Corporate debt securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	0	0
30-90 Days | Equity securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	0	11
30-90 Days | Other
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	0	0
Greater than 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	0	0
Securities lending transactions	1,606	1,316
Gross amount of recognized liabilities for repurchase agreements and securities lending	1,606	1,316
Greater than 90 Days | U.S. Treasury and agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	0	0
Securities lending transactions	0	0
Greater than 90 Days | Non-US sovereign debt
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	0	0
Greater than 90 Days | Corporate debt securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	0	0
Greater than 90 Days | Equity securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	1,606	1,316
Greater than 90 Days | Other
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	$ 0	$ 0