Commitments and Contingencies - Narrative - (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Other Commitments [Line Items]
Other Liabilities	$ 14,277	$ 11,550
Trading assets at fair value	4,423	3,872
Variable Interest Entity & TRS Contracts
Other Commitments [Line Items]
VIE Assets	1,500	1,300
Other Liabilities	50	41
Trading assets at fair value	1,500	$ 1,300
Loss Contingency [Abstract]
Equity Securities, FV-NI	102
Max
Loss Contingency [Abstract]
Loss Contingency, Range of Possible Loss, Portion Not Accrued	$ 200