Financial Derivatives (Derivative Assets and Liabilities Offsetting) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Derivative Asset, Fair Value, Amount Offset Against Collateral [Abstract]
Gross Fair Value	$ 3,011	$ 3,429
Fair Value Offset Amount	1,298	1,406
Cash Collateral	897	1,126
Derivative Asset, Net	816	897
Securities Collateral Held /Pledged Under Master Netting Agreements	45	66
Net Amounts	771	831
Derivative Liability, Fair Value, Amount Offset Against Collateral [Abstract]
Gross Fair Value	5,495	5,899
Fair Value Offset Amount	1,298	1,406
Cash Collateral	1,029	955
Derivative Liability, Net	3,168	3,538
Securities Collateral Held /Pledged Under Master Netting Agreements	57	58
Net Amounts	3,111	3,480
Commodity contracts
Derivative Asset, Fair Value, Amount Offset Against Collateral [Abstract]
Gross Fair Value	521	765
Fair Value Offset Amount	296	316
Cash Collateral	85	283
Derivative Asset, Net	140	166
Securities Collateral Held /Pledged Under Master Netting Agreements	5	5
Net Amounts	135	161
Derivative Liability, Fair Value, Amount Offset Against Collateral [Abstract]
Gross Fair Value	496	757
Fair Value Offset Amount	393	332
Cash Collateral	2
Derivative Liability, Net	101	425
Net Amounts	101	425
Foreign exchange and other contracts
Derivative Asset, Fair Value, Amount Offset Against Collateral [Abstract]
Gross Fair Value	561	307
Fair Value Offset Amount	159	114
Cash Collateral	183	76
Derivative Asset, Net	219	117
Securities Collateral Held /Pledged Under Master Netting Agreements	2
Net Amounts	217	117
Derivative Liability, Fair Value, Amount Offset Against Collateral [Abstract]
Gross Fair Value	513	494
Fair Value Offset Amount	173	189
Cash Collateral	8	13
Derivative Liability, Net	332	292
Net Amounts	332	292
Over-the-counter cleared | Interest rate contracts:
Derivative Asset, Fair Value, Amount Offset Against Collateral [Abstract]
Gross Fair Value	35	19
Derivative Asset, Net	35	19
Net Amounts	35	19
Derivative Liability, Fair Value, Amount Offset Against Collateral [Abstract]
Gross Fair Value	17	36
Derivative Liability, Net	17	36
Net Amounts	17	36
Over-the-counter | Interest rate contracts:
Derivative Asset, Fair Value, Amount Offset Against Collateral [Abstract]
Gross Fair Value	1,894	2,338
Fair Value Offset Amount	843	976
Cash Collateral	629	767
Derivative Asset, Net	422	595
Securities Collateral Held /Pledged Under Master Netting Agreements	38	61
Net Amounts	384	534
Derivative Liability, Fair Value, Amount Offset Against Collateral [Abstract]
Gross Fair Value	4,469	4,612
Fair Value Offset Amount	732	885
Cash Collateral	1,019	942
Derivative Liability, Net	2,718	2,785
Securities Collateral Held /Pledged Under Master Netting Agreements	57	58
Net Amounts	$ 2,661	$ 2,727