Commitments, Contingencies and Guarantees - Additional Information (Detail) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021	Jun. 30, 2022	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Summary Of Commitments And Contingent Liabilities [Line Items]
Lending commitments allowance	$ 739	$ 776	$ 705	$ 833	$ 822	$ 557
Estimated fair value of lending commitments liabilities	6,700	4,170
Carrying value of lending commitments liabilities	130	91
Commercial lending commitments	222,937	211,552
Lending Commitments	216,644	197,120
Other commitments	12,514	9,143
Commitments to invest in funds managed by the firm	1,340	1,600
Unsecured Installment Loans
Summary Of Commitments And Contingent Liabilities [Line Items]
Other commitments	957	9
NN Investment Partners
Summary Of Commitments And Contingent Liabilities [Line Items]
Investment commitments		1,900
GreenSky, Inc
Summary Of Commitments And Contingent Liabilities [Line Items]
Investment commitments		2,000
GreenSky, Inc | Other Commitment
Summary Of Commitments And Contingent Liabilities [Line Items]
Undrawn commitments		600
Credit card receivables issued to customers
Summary Of Commitments And Contingent Liabilities [Line Items]
Lending Commitments	60,660	33,970
Consumer
Summary Of Commitments And Contingent Liabilities [Line Items]
Increase in credit card lending commitments related to acquisition of co-branded credit card portfolio	15,000
Commitment related to General Motors co-branded credit card portfolio		2,000
Securities Lending Indemnification
Summary Of Commitments And Contingent Liabilities [Line Items]
Maximum payout of indemnifications	14,040	11,050
Collateral held by lenders in connection with securities lending indemnifications	14,500	11,360
Amortized Cost
Summary Of Commitments And Contingent Liabilities [Line Items]
Carrying value of lending commitments liabilities	958	1,050
Amortized Cost | Level 2
Summary Of Commitments And Contingent Liabilities [Line Items]
Estimated fair value of lending commitments liabilities	4,000	1,910
Amortized Cost | Level 3
Summary Of Commitments And Contingent Liabilities [Line Items]
Estimated fair value of lending commitments liabilities	2,700	2,260
Commercial Lending, Relationship Lending Activities
Summary Of Commitments And Contingent Liabilities [Line Items]
Commercial lending commitments	123,830	120,990
Commercial Lending, Other Investment Banking Activities
Summary Of Commitments And Contingent Liabilities [Line Items]
Commercial lending commitments	10,270	$ 21,070
GS Malaysia Development Berhad | Guarantee Obligations
Summary Of Commitments And Contingent Liabilities [Line Items]
Agreement in principle to extend a guarantee related to legal and regulatory proceedings	1,400
Interim payment	250
Assets and proceeds received by counterparty	500
Repayments for other financial guarantees	1,400
GS Malaysia Development Berhad | Guarantee Obligations | Government of Malaysia
Summary Of Commitments And Contingent Liabilities [Line Items]
Assets and proceeds received by counterparty	500
Asset adjustment by counterparty	$ 80