FAIR VALUE MEASUREMENT - Valuation Techniques and Inputs for Level 3 Fair Value Measurements (Details)	Sep. 30, 2021 USD ($) year	Dec. 31, 2020 USD ($) year
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities	$ 918,000,000	$ 1,066,000,000
Model-based | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities borrowed and purchased under agreements to resell	257,000,000	320,000,000
State and municipal, foreign government, corporate and other debt securities	904,000,000	852,000,000
Marketable equity securities	41,000,000	36,000,000
Non-marketable equities	67,000,000
Loans and leases	656,000,000	1,804,000,000
Mortgage servicing rights	76,000,000	78,000,000
Interest-bearing deposits	149,000,000	206,000,000
Securities loaned and sold under agreement to repurchase	656,000,000	631,000,000
Securities sold, not yet purchased and other trading liabilities		178,000,000
Short-term borrowings and long-term debt	25,792,000,000	24,827,000,000
Model-based | Level 3 | Interest rate contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	4,681,000,000	5,143,000,000
Model-based | Level 3 | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	1,219,000,000	1,296,000,000
Model-based | Level 3 | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	5,400,000,000	7,330,000,000
Model-based | Level 3 | Commodity and other contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	1,985,000,000	1,636,000,000
Model-based | Level 3 | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	1,111,000,000	1,854,000,000
Price-based | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage-backed securities	244,000,000	344,000,000
State and municipal, foreign government, corporate and other debt securities	2,223,000,000	1,566,000,000
Marketable equity securities	139,000,000	36,000,000
Asset-backed securities	360,000,000	863,000,000
Non-marketable equities	114,000,000	142,000,000
Nontrading derivatives and other financial assets and liabilities measured on a recurring basis (gross)	87,000,000
Securities sold, not yet purchased and other trading liabilities	81,000,000	62,000,000
Price-based | Level 3 | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	458,000,000	408,000,000
Yield analysis | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage-backed securities	376,000,000	168,000,000
Asset-backed securities	307,000,000	744,000,000
Comparable analysis | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities	25,000,000
Non-marketable equities	166,000,000	205,000,000
Cash flow | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights	$ 333,000,000	$ 258,000,000
Minimum | Model-based | Level 3 | Credit Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities borrowed and purchased under agreements to resell	0.15%	0.15%
State and municipal, foreign government, corporate and other debt securities		0.0035
Minimum | Model-based | Level 3 | Credit Spread | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0005	0.000350
Minimum | Model-based | Level 3 | Interest Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities borrowed and purchased under agreements to resell	0.27%	0.30%
Securities loaned and sold under agreement to repurchase	0.0013	0.0008
Minimum | Model-based | Level 3 | Interest Rate | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0243	0.0084
Minimum | Model-based | Level 3 | Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities		$ 0
Non-marketable equities	$ 43.43
Minimum | Model-based | Level 3 | Illiquidity Discount
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities	0.2000
Minimum | Model-based | Level 3 | Adjustment Factor
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	0
Minimum | Model-based | Level 3 | EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	4.60
Minimum | Model-based | Level 3 | Revenue Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	13.00
Minimum | Model-based | Level 3 | IR Normal Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Interest-bearing deposits	0.0014	0.0011
Short-term borrowings and long-term debt	0.0011	0.0011
Minimum | Model-based | Level 3 | IR Normal Volatility | Interest rate contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0005	0.0011
Minimum | Model-based | Level 3 | IR Normal Volatility | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0011	0.0011
Minimum | Model-based | Level 3 | Inflation Volatility | Interest rate contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0026	0.0027
Minimum | Model-based | Level 3 | FX Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt	0
Minimum | Model-based | Level 3 | FX Volatility | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0076	0.0170
Minimum | Model-based | Level 3 | IR-FX Correlation | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		0.4000
Minimum | Model-based | Level 3 | IR-IR Correlation | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		(0.2171)
Minimum | Model-based | Level 3 | Equity - Equity Correlation | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	(0.4000)
Minimum | Model-based | Level 3 | Equity-IR Correlation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt	(0.1300)
Minimum | Model-based | Level 3 | IR Lognormal Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities sold, not yet purchased and other trading liabilities		0.5206
Minimum | Model-based | Level 3 | Equity Forward | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.5778
Minimum | Model-based | Level 3 | Equity - FX Correlation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt	(0.8010)
Minimum | Model-based | Level 3 | Equity - FX Correlation | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	(0.8010)
Minimum | Model-based | Level 3 | Forward Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt		0.1540
Minimum | Model-based | Level 3 | Forward Price | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		0.6588
Minimum | Model-based | Level 3 | Forward Price | Commodity and other contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.3749	0.1540
Minimum | Model-based | Level 3 | Commodity Correlation | Commodity and other contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	(0.5082)	(0.4492)
Minimum | Model-based | Level 3 | Equity Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
State and municipal, foreign government, corporate and other debt securities	0
Loans and leases	0.2342	0.2465
Short-term borrowings and long-term debt	0
Minimum | Model-based | Level 3 | Equity Volatility | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0	0.0500
Minimum | Model-based | Level 3 | WAL
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights | year	3.26	2.66
Minimum | Model-based | Level 3 | Commodity Volatility | Commodity and other contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.1100	0.0016
Minimum | Model-based | Level 3 | Contingent Event | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		1.0000
Minimum | Price-based | Level 3 | Interest Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities sold, not yet purchased and other trading liabilities		0.1003
Minimum | Price-based | Level 3 | Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage-backed securities	$ 4.41	$ 30
State and municipal, foreign government, corporate and other debt securities	0.01	0
Marketable equity securities	0
Asset-backed securities	5.70	2
Non-marketable equities		136
Nontrading derivatives and other financial assets and liabilities measured on a recurring basis (gross)	5.63
Securities sold, not yet purchased and other trading liabilities	0	$ 0
Minimum | Price-based | Level 3 | Price | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	$ 40.00
Minimum | Price-based | Level 3 | PE Ratio
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	11.20
Minimum | Price-based | Level 3 | Adjustment Factor
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities		0.20
Minimum | Price-based | Level 3 | EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities		3.30
Minimum | Price-based | Level 3 | Revenue Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities		2.70
Minimum | Price-based | Level 3 | WAL
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities | year		1.48
Minimum | Price-based | Level 3 | Recovery
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities		$ 5,733,000,000
Minimum | Price-based | Level 3 | Credit Correlation | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.2500	0.2500
Minimum | Price-based | Level 3 | Upfront Points | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0454	0
Minimum | Price-based | Level 3 | Recovery Rate | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.2500	0.2000
Minimum | Price-based | Level 3 | Appraised Value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities		$ 287,000
Minimum | Yield analysis | Level 3 | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage-backed securities	2.10%	2.63%
Asset-backed securities	2.76%	3.77%
Minimum | Comparable analysis | Level 3 | Illiquidity Discount
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	100,000.00	0.1000
Minimum | Comparable analysis | Level 3 | PE Ratio
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities		13.60
Minimum | Comparable analysis | Level 3 | Revenue Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities	6.40
Minimum | Comparable analysis | Level 3 | WAL
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities | year	1.99
Minimum | Comparable analysis | Level 3 | Recovery
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities	$ 5,733,000,000
Minimum | Cash flow | Level 3 | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights	0.0200	0.0286
Maximum | Model-based | Level 3 | Credit Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities borrowed and purchased under agreements to resell	0.15%	0.15%
State and municipal, foreign government, corporate and other debt securities		0.0375
Maximum | Model-based | Level 3 | Credit Spread | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0625	0.035235
Maximum | Model-based | Level 3 | Interest Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities borrowed and purchased under agreements to resell	0.64%	0.35%
Securities loaned and sold under agreement to repurchase	0.0234	0.0186
Maximum | Model-based | Level 3 | Interest Rate | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0804	0.8409
Maximum | Model-based | Level 3 | Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities		$ 31,000
Non-marketable equities	$ 1,684
Maximum | Model-based | Level 3 | Illiquidity Discount
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities	0.2100
Maximum | Model-based | Level 3 | Adjustment Factor
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	0.70
Maximum | Model-based | Level 3 | EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	18.30
Maximum | Model-based | Level 3 | Revenue Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	25.10
Maximum | Model-based | Level 3 | IR Normal Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Interest-bearing deposits	0.0078	0.0073
Short-term borrowings and long-term debt	0.0078	0.0073
Maximum | Model-based | Level 3 | IR Normal Volatility | Interest rate contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0078	0.0073
Maximum | Model-based | Level 3 | IR Normal Volatility | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0059	0.0052
Maximum | Model-based | Level 3 | Inflation Volatility | Interest rate contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0271	0.0236
Maximum | Model-based | Level 3 | FX Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt	0.3257
Maximum | Model-based | Level 3 | FX Volatility | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.4160	0.1263
Maximum | Model-based | Level 3 | IR-FX Correlation | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		0.6000
Maximum | Model-based | Level 3 | IR-IR Correlation | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		0.4000
Maximum | Model-based | Level 3 | Equity - Equity Correlation | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.9900
Maximum | Model-based | Level 3 | Equity-IR Correlation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt	0.6000
Maximum | Model-based | Level 3 | IR Lognormal Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities sold, not yet purchased and other trading liabilities		1.2887
Maximum | Model-based | Level 3 | Equity Forward | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	1.2780
Maximum | Model-based | Level 3 | Equity - FX Correlation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt	0.8000
Maximum | Model-based | Level 3 | Equity - FX Correlation | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.8000
Maximum | Model-based | Level 3 | Forward Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt		2.6200
Maximum | Model-based | Level 3 | Forward Price | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		1.0520
Maximum | Model-based | Level 3 | Forward Price | Commodity and other contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	6.1933	2.6200
Maximum | Model-based | Level 3 | Commodity Correlation | Commodity and other contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.9195	0.9591
Maximum | Model-based | Level 3 | Equity Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
State and municipal, foreign government, corporate and other debt securities	2.8678
Loans and leases	0.6396	0.8309
Short-term borrowings and long-term debt	2.8678
Maximum | Model-based | Level 3 | Equity Volatility | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	2.8678	0.9143
Maximum | Model-based | Level 3 | WAL
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights | year	6.68	5.40
Maximum | Model-based | Level 3 | Commodity Volatility | Commodity and other contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	1.3000	0.8017
Maximum | Model-based | Level 3 | Contingent Event | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		1.0000
Maximum | Price-based | Level 3 | Interest Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities sold, not yet purchased and other trading liabilities		0.2007
Maximum | Price-based | Level 3 | Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage-backed securities	$ 120.77	$ 111
State and municipal, foreign government, corporate and other debt securities	1,024.98	2,265
Marketable equity securities	73,000
Asset-backed securities	3,450	157
Non-marketable equities		2,041
Nontrading derivatives and other financial assets and liabilities measured on a recurring basis (gross)	252.23
Securities sold, not yet purchased and other trading liabilities	12,100	$ 866
Maximum | Price-based | Level 3 | Price | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	$ 102.88
Maximum | Price-based | Level 3 | PE Ratio
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	29.60
Maximum | Price-based | Level 3 | Adjustment Factor
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities		0.61
Maximum | Price-based | Level 3 | EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities		36.70
Maximum | Price-based | Level 3 | Revenue Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities		28.00
Maximum | Price-based | Level 3 | WAL
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities | year		1.48
Maximum | Price-based | Level 3 | Recovery
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities		$ 5,733,000,000
Maximum | Price-based | Level 3 | Credit Correlation | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.8000	0.8000
Maximum | Price-based | Level 3 | Upfront Points | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.9997	1.0720
Maximum | Price-based | Level 3 | Recovery Rate | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.7500	0.6000
Maximum | Price-based | Level 3 | Appraised Value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities		$ 39,745,000
Maximum | Yield analysis | Level 3 | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage-backed securities	17.85%	21.80%
Asset-backed securities	21.13%	21.77%
Maximum | Comparable analysis | Level 3 | Illiquidity Discount
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	350,000.00	0.4500
Maximum | Comparable analysis | Level 3 | PE Ratio
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities		28.00
Maximum | Comparable analysis | Level 3 | Revenue Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities	6.40
Maximum | Comparable analysis | Level 3 | WAL
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities | year	1.99
Maximum | Comparable analysis | Level 3 | Recovery
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities	$ 5,733,000,000
Maximum | Cash flow | Level 3 | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights	0.1400	0.1600
Weighted Average | Model-based | Level 3 | Credit Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities borrowed and purchased under agreements to resell	0.15%	0.15%
State and municipal, foreign government, corporate and other debt securities		0.0226
Weighted Average | Model-based | Level 3 | Credit Spread | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0066	0.009989
Weighted Average | Model-based | Level 3 | Interest Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities borrowed and purchased under agreements to resell	0.46%	0.32%
Securities loaned and sold under agreement to repurchase	0.0162	0.0071
Weighted Average | Model-based | Level 3 | Interest Rate | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0639	0.1755
Weighted Average | Model-based | Level 3 | Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities		$ 5,132
Non-marketable equities	$ 1,219.39
Weighted Average | Model-based | Level 3 | Illiquidity Discount
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities	0.2031
Weighted Average | Model-based | Level 3 | Adjustment Factor
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	0.32
Weighted Average | Model-based | Level 3 | EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	12.89
Weighted Average | Model-based | Level 3 | Revenue Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	18.54
Weighted Average | Model-based | Level 3 | IR Normal Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Interest-bearing deposits	0.0062	0.0054
Short-term borrowings and long-term debt	0.0056	0.0051
Weighted Average | Model-based | Level 3 | IR Normal Volatility | Interest rate contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0057	0.0052
Weighted Average | Model-based | Level 3 | IR Normal Volatility | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0051	0.0046
Weighted Average | Model-based | Level 3 | Inflation Volatility | Interest rate contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0122	0.0078
Weighted Average | Model-based | Level 3 | FX Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt	0.0968
Weighted Average | Model-based | Level 3 | FX Volatility | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.1025	0.0541
Weighted Average | Model-based | Level 3 | IR-FX Correlation | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		0.5000
Weighted Average | Model-based | Level 3 | IR-IR Correlation | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		0.3809
Weighted Average | Model-based | Level 3 | Equity - Equity Correlation | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.8051
Weighted Average | Model-based | Level 3 | Equity-IR Correlation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt	0.2919
Weighted Average | Model-based | Level 3 | IR Lognormal Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities sold, not yet purchased and other trading liabilities		0.8982
Weighted Average | Model-based | Level 3 | Equity Forward | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.8935
Weighted Average | Model-based | Level 3 | Equity - FX Correlation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt	(0.1034)
Weighted Average | Model-based | Level 3 | Equity - FX Correlation | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	(0.1034)
Weighted Average | Model-based | Level 3 | Forward Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt		0.9248
Weighted Average | Model-based | Level 3 | Forward Price | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		0.9182
Weighted Average | Model-based | Level 3 | Forward Price | Commodity and other contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.9931	0.9853
Weighted Average | Model-based | Level 3 | Commodity Correlation | Commodity and other contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	(0.0071)	0.7060
Weighted Average | Model-based | Level 3 | Equity Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
State and municipal, foreign government, corporate and other debt securities	0.2308
Loans and leases	0.3698	0.5823
Short-term borrowings and long-term debt	0.2317
Weighted Average | Model-based | Level 3 | Equity Volatility | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.3561	0.4274
Weighted Average | Model-based | Level 3 | WAL
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights | year	5.68	4.46
Weighted Average | Model-based | Level 3 | Commodity Volatility | Commodity and other contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.2504	0.2372
Weighted Average | Model-based | Level 3 | Contingent Event | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		1.0000
Weighted Average | Price-based | Level 3 | Interest Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities sold, not yet purchased and other trading liabilities		0.1370
Weighted Average | Price-based | Level 3 | Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage-backed securities	$ 50.04	$ 80
State and municipal, foreign government, corporate and other debt securities	188.92	90
Marketable equity securities	6,027.91
Asset-backed securities	447.00	59
Non-marketable equities		1,647
Nontrading derivatives and other financial assets and liabilities measured on a recurring basis (gross)	152.32
Securities sold, not yet purchased and other trading liabilities	1,378	$ 80
Weighted Average | Price-based | Level 3 | Price | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	$ 79.01
Weighted Average | Price-based | Level 3 | PE Ratio
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	16.62
Weighted Average | Price-based | Level 3 | Adjustment Factor
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities		0.25
Weighted Average | Price-based | Level 3 | EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities		15.10
Weighted Average | Price-based | Level 3 | Revenue Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities		8.92
Weighted Average | Price-based | Level 3 | WAL
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities | year		1.48
Weighted Average | Price-based | Level 3 | Recovery
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities		$ 5,733,000,000
Weighted Average | Price-based | Level 3 | Credit Correlation | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.5225	0.4336
Weighted Average | Price-based | Level 3 | Upfront Points | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.5938	0.4810
Weighted Average | Price-based | Level 3 | Recovery Rate | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.4225	0.4160
Weighted Average | Price-based | Level 3 | Appraised Value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities		$ 21,754,000
Weighted Average | Yield analysis | Level 3 | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage-backed securities	5.62%	10.13%
Asset-backed securities	7.25%	9.01%
Weighted Average | Comparable analysis | Level 3 | Illiquidity Discount
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	274,000	0.2529
Weighted Average | Comparable analysis | Level 3 | PE Ratio
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities		22.83
Weighted Average | Comparable analysis | Level 3 | Revenue Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities	6.40
Weighted Average | Comparable analysis | Level 3 | WAL
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities | year	1.99
Weighted Average | Comparable analysis | Level 3 | Recovery
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities	$ 5,733,000,000
Weighted Average | Cash flow | Level 3 | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights	0.0670	0.0632