Derivative Positions (Detail) - USD ($) $ in Millions		Jun. 30, 2016		Dec. 31, 2015
Derivative Asset, Notional Amount		$ 136,166		$ 123,025
Derivative Asset, Fair Value, Gross Asset		6,598		4,465
Derivative Liability, Notional Amount		137,664		123,514
Derivative Liability, Fair Value, Gross Liability		5,891		4,428
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		6,598		4,465
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		5,891		4,428
Derivative, Fair Value, Amount Offset Against Collateral, Net		(4,143)		(2,916)
Derivative Liability, Fair Value, Amount Offset Against Collateral		(4,143)		(2,916)
Derivative Asset, Collateral, Obligation to Return Cash, Offset		(786)		(397)
Derivative Liability, Collateral, Right to Reclaim Cash, Offset		(1,290)		(1,048)
Derivative Assets	[1]	(1,669)		(1,152)
Derivative Liabilities	[2]	458		464
Credit Risk Contract [Member]
Derivative Asset, Notional Amount		6		6
Derivative Liability, Notional Amount		8	[3],[4]	9
Not Designated as Hedging Instrument [Member]
Derivative Asset, Notional Amount		115,681	[5]	106,765
Derivative Asset, Fair Value, Gross Asset		6,076	[5]	4,321
Derivative Liability, Notional Amount		136,034	[5]	119,984
Derivative Liability, Fair Value, Gross Liability		5,890	[5]	4,417
Not Designated as Hedging Instrument [Member] | Mortgage Servicing Rights [Member]
Derivative Asset, Notional Amount		13,701	[5],[6]	7,782	[3],[4]
Derivative Asset, Fair Value, Gross Asset		858	[5],[6]	198	[3],[4]
Derivative Liability, Notional Amount		24,700	[5],[6]	16,882	[3],[4]
Derivative Liability, Fair Value, Gross Liability		534	[5],[6]	98	[3],[4]
Not Designated as Hedging Instrument [Member] | Loans Held For Sale [Member]
Derivative Asset, Notional Amount		3,118	[5],[7]	4,309	[4],[8]
Derivative Asset, Fair Value, Gross Asset		22	[5],[7]	10	[4],[8]
Derivative Liability, Notional Amount		7,519	[5],[7]	2,520	[4],[8]
Derivative Liability, Fair Value, Gross Liability		70	[5],[7]	5	[4],[8]
Not Designated as Hedging Instrument [Member] | Loans [Member]
Derivative Asset, Notional Amount		5	[5]	15	[4]
Derivative Asset, Fair Value, Gross Asset		1	[5]	0
Derivative Liability, Notional Amount		40	[5]	40	[4]
Derivative Liability, Fair Value, Gross Liability		4	[5]	1	[4]
Not Designated as Hedging Instrument [Member] | Loans [Member] | Credit Risk Contract [Member]
Derivative Asset, Notional Amount		0		0
Derivative Asset, Fair Value, Gross Asset		0		0
Derivative Liability, Notional Amount		505	[5]	175	[4]
Derivative Liability, Fair Value, Gross Liability		5	[5]	2	[4]
Not Designated as Hedging Instrument [Member] | Other Trading [Member] | Interest Rate Contract [Member]
Derivative Asset, Notional Amount		67,397	[5],[9]	67,164	[4],[10]
Derivative Asset, Fair Value, Gross Asset		2,968	[5],[9]	1,983	[4],[10]
Derivative Liability, Notional Amount		67,767	[5],[9]	66,854	[4],[10]
Derivative Liability, Fair Value, Gross Liability		2,742	[5],[9]	1,796	[4],[10]
Not Designated as Hedging Instrument [Member] | Other Trading [Member] | Credit Risk Contract [Member]
Derivative Asset, Notional Amount		2,181	[5],[11]	2,232	[4],[12]
Derivative Asset, Fair Value, Gross Asset		19	[5],[11]	57	[4],[12]
Derivative Liability, Notional Amount		2,369	[5],[11]	2,385	[4],[12]
Derivative Liability, Fair Value, Gross Liability		17	[5],[11]	54	[4],[12]
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract
Derivative Asset, Notional Amount		4,030	[5]	3,648	[4]
Derivative Asset, Fair Value, Gross Asset		143	[5]	127	[4]
Derivative Liability, Notional Amount		3,604	[5]	3,227	[4]
Derivative Liability, Fair Value, Gross Liability		129	[5]	122	[4]
Not Designated as Hedging Instrument [Member] | Equity Contract [Member]
Derivative Asset, Notional Amount		20,368	[5],[9]	19,138	[4],[10]
Derivative Asset, Fair Value, Gross Asset		1,919	[5],[9]	1,812	[4],[10]
Derivative Liability, Notional Amount		28,827	[5],[9]	27,154	[4],[10]
Derivative Liability, Fair Value, Gross Liability		2,305	[5],[9]	2,222	[4],[10]
Not Designated as Hedging Instrument [Member] | Other Contract [Member]
Derivative Asset, Notional Amount		4,287	[5],[11]	2,024	[4],[12]
Derivative Asset, Fair Value, Gross Asset		73	[5],[11]	21	[4],[12]
Derivative Liability, Notional Amount		111	[5],[11]	299	[4],[12]
Derivative Liability, Fair Value, Gross Liability		13	[5],[11]	6	[4],[12]
Not Designated as Hedging Instrument [Member] | Commodity [Member]
Derivative Asset, Notional Amount		594	[5]	453	[4]
Derivative Asset, Fair Value, Gross Asset		73	[5]	113	[4]
Derivative Liability, Notional Amount		592	[5]	448	[4]
Derivative Liability, Fair Value, Gross Liability		71	[5]	111	[4]
Cash Flow Hedging [Member] | Interest Rate Contract [Member]
Derivative Asset, Notional Amount		17,950	[13]	14,500	[14]
Derivative Asset, Fair Value, Gross Asset		477	[13]	130	[14]
Derivative Liability, Notional Amount		0		2,900	[14]
Derivative Liability, Fair Value, Gross Liability		0		11	[14]
Fair Value Hedging | Interest Rate Contract [Member]
Derivative Asset, Notional Amount		2,535	[15]	1,760	[16]
Derivative Asset, Fair Value, Gross Asset		45	[15]	14	[16]
Derivative Liability, Notional Amount		1,630	[15]	630	[16]
Derivative Liability, Fair Value, Gross Liability		1	[15]	0
Fair Value Hedging | Fixed Income Interest Rate [Member]
Derivative Asset, Notional Amount		2,475	[15]	1,700	[16]
Derivative Asset, Fair Value, Gross Asset		44	[15]	14	[16]
Derivative Liability, Notional Amount		1,600	[15]	600	[16]
Derivative Liability, Fair Value, Gross Liability		1	[15]	0
Fair Value Hedging | Brokered Time Deposits [Member]
Derivative Asset, Notional Amount		60	[15]	60	[16]
Derivative Asset, Fair Value, Gross Asset		1	[15]	0
Derivative Liability, Notional Amount		30		30
Derivative Liability, Fair Value, Gross Liability		$ 0		$ 0

[1] At June 30, 2016, $1.7 billion, net of $786 million offsetting cash collateral, is recognized in trading assets and derivative instruments within the Company's Consolidated Balance Sheets. At December 31, 2015, $1.2 billion, net of $397 million offsetting cash collateral, is recognized in trading assets and derivative instruments within the Company's Consolidated Balance Sheets.

[2] At June 30, 2016, $458 million, net of $1.3 billion offsetting cash collateral, is recognized in trading liabilities and derivative instruments within the Company's Consolidated Balance Sheets. At December 31, 2015, $464 million, net of $1.0 billion offsetting cash collateral, is recognized in trading liabilities and derivative instruments within the Company's Consolidated Balance Sheets.

[3] Amount includes $9.1 billion of notional amounts related to interest rate futures. These futures contracts settle in cash daily, one day in arrears. The derivative asset or liability associated with the one day lag is included in the fair value column of this table.

[4] See “Economic Hedging and Trading Activities” in this Note for further discussion.

[5] See “Economic Hedging and Trading Activities” in this Note for further discussion.

[6] Amount includes $16.5 billion of notional amounts related to interest rate futures. These futures contracts settle in cash daily, one day in arrears. The derivative asset or liability associated with the one day lag is included in the fair value column of this table.

[7] Amount includes $540 million of notional amounts related to interest rate futures. These futures contracts settle in cash daily, one day in arrears. The derivative asset or liability associated with the one day lag is included in the fair value column of this table.

[8] Amount includes $518 million of notional amounts related to interest rate futures. These futures contracts settle in cash daily, one day in arrears. The derivative asset or liability associated with the one day lag is included in the fair value column of this table.

[9] Amounts include $12.0 billion of notional amounts related to interest rate futures and $846 million of notional amounts related to equity futures. These futures contracts settle in cash daily, one day in arrears. The derivative asset or liability associated with the one day lag is included in the fair value column of this table. Amounts also include notional amounts related to interest rate swaps hedging fixed rate debt.

[10] Amounts include $12.6 billion of notional amounts related to interest rate futures and $329 million of notional amounts related to equity futures. These futures contracts settle in cash daily, one day in arrears. The derivative asset or liability associated with the one day lag is included in the fair value column of this table. Amounts also include notional amounts related to interest rate swaps hedging fixed rate debt.

[11] Asset and liability amounts include $6 million and $8 million, respectively, of notional amounts from purchased and written credit risk participation agreements, whose notional is calculated as the notional of the derivative participated adjusted by the relevant RWA conversion factor.

[12] Asset and liability amounts include $6 million and $9 million, respectively, of notional amounts from purchased and written credit risk participation agreements, whose notional is calculated as the notional of the derivative participated adjusted by the relevant RWA conversion factor.

[13] See “Cash Flow Hedges” in this Note for further discussion.

[14] See “Cash Flow Hedges” in this Note for further discussion.

[15] See “Fair Value Hedges” in this Note for further discussion.

[16] See “Fair Value Hedges” in this Note for further discussion.