Variable Interest Entities (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Variable Interest Entity [Line Items]
Assets not available for use	$ 502,053	$ 450,256
Liabilities with no recourse	139,137	125,172
Noncontrolling interest	4,300	4,200
Redeemable noncontrolling interest	1,100	1,100
Unconsolidated VIE, carrying value	1,400	1,500
Variable Interest Entity, Primary Beneficiary | Nonrecourse
Variable Interest Entity [Line Items]
Liabilities with no recourse	1,800	2,300
Variable Interest Entity, Primary Beneficiary | Asset Pledged as Collateral
Variable Interest Entity [Line Items]
Assets not available for use	$ 7,000	$ 8,700