Offsetting Arrangements - Repo, Sec Lending Transactions Maturity by Category (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	$ 243,596	$ 227,222
Securities lending transactions	30,189	22,810
Gross amount of recognized liabilities for repurchase agreements and securities lending	273,785	250,032
U.S. Treasury and agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	243,596	227,222
Securities lending transactions	175	152
Corporate debt securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	29	193
Equity securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	14,495	15,713
Other
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	15,490	6,752
Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	243,596	223,095
Securities lending transactions	26,973	18,278
Gross amount of recognized liabilities for repurchase agreements and securities lending	270,569	241,373
Overnight and Continuous | U.S. Treasury and agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	243,596	223,095
Securities lending transactions	175	152
Overnight and Continuous | Corporate debt securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	29	193
Overnight and Continuous | Equity securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	11,279	11,181
Overnight and Continuous | Other
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	15,490	6,752
Up to 30 Days
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	0	350
Securities lending transactions	0	13
Gross amount of recognized liabilities for repurchase agreements and securities lending	0	363
Up to 30 Days | U.S. Treasury and agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	0	350
Securities lending transactions	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	13
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	0	1,277
Securities lending transactions	1	0
Gross amount of recognized liabilities for repurchase agreements and securities lending	1	1,277
30-90 Days | U.S. Treasury and agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	0	1,277
Securities lending transactions	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	1	0
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	2,500
Securities lending transactions	3,215	4,519
Gross amount of recognized liabilities for repurchase agreements and securities lending	3,215	7,019
Greater than 90 Days | U.S. Treasury and agency securities
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	0	2,500
Securities lending transactions	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	3,215	4,519
Greater than 90 Days | Other
Assets Sold under Agreements to Repurchase [Line Items]
Securities lending transactions	$ 0	$ 0