Derivative Positions (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Derivative Asset, Fair Value, Gross Asset	$ 6,067		$ 5,839
Derivative liability positions, fair value	5,728		5,577
Derivative Asset, Collateral, Obligation to Return Cash, Offset	(4,062)		(4,083)
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	(4,062)		(4,083)
Derivative Assets	(1,475)	[1]	(1,307)	[1]
Derivative Liabilities	552	[2]	462	[2]
Trading Liabilities [Member]
Derivative Liability, Fair Value of Collateral	(1,114)		(1,032)
Derivative Liabilities	552		462
Derivative Financial Instruments, Assets
Derivative Asset, Notional Amount	124,258		118,139
Derivative Asset, Fair Value, Gross Asset	6,067		5,839
Derivative Assets	(1,475)		1,307
Derivative Financial Instruments, Assets | Designated as Hedging Instrument | Cash Flow Hedging | Interest Rate Contract [Member] | Floating Rate Loans | Trading Securities [Member]
Derivative Asset, Notional Amount	16,800	[3]	18,150	[3]
Derivative Asset, Fair Value, Gross Asset	173	[3]	208	[3]
Derivative Financial Instruments, Assets | Designated as Hedging Instrument | Fair Value Hedging | Interest Rate Contract [Member] | Trading Securities [Member]
Derivative Asset, Notional Amount	4,730	[4]	2,730	[4]
Derivative Asset, Fair Value, Gross Asset	48	[4]	30	[4]
Derivative Financial Instruments, Assets | Designated as Hedging Instrument | Fair Value Hedging | Interest Rate Contract [Member] | Fixed Rate Debt | Trading Securities [Member]
Derivative Asset, Notional Amount	4,700	[4]	2,700	[4]
Derivative Asset, Fair Value, Gross Asset	48	[4]	30	[4]
Derivative Financial Instruments, Assets | Designated as Hedging Instrument | Fair Value Hedging | Interest Rate Contract [Member] | Brokered Deposits [Member] | Trading Securities [Member]
Derivative Asset, Notional Amount	30	[4]	30	[4]
Derivative Asset, Fair Value, Gross Asset	0		0
Derivative Financial Instruments, Assets | Not Designated as Hedging Instrument [Member]
Derivative Asset, Notional Amount	102,728	[5]	97,259
Derivative Asset, Fair Value, Gross Asset	5,846	[5]	5,601
Derivative Financial Instruments, Assets | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Mortgage Servicing Rights [Member] | Trading Securities [Member]
Derivative Asset, Notional Amount	7,379	[5]	5,172	[5]
Derivative Asset, Fair Value, Gross Asset	280	[5]	163	[5]
Derivative Financial Instruments, Assets | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Loans | Trading Securities [Member]
Derivative Asset, Notional Amount	2,435	[5],[6]	1,840	[5],[7]
Derivative Asset, Fair Value, Gross Asset	9	[5],[6]	4	[5],[7]
Derivative Financial Instruments, Assets | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Trading Activity | Trading Securities [Member]
Derivative Asset, Notional Amount	62,171	[5],[8]	61,049	[5],[9]
Derivative Asset, Fair Value, Gross Asset	2,554	[5],[8]	2,405	[5],[9]
Derivative Financial Instruments, Assets | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract | Trading Activity | Trading Securities [Member]
Derivative Asset, Notional Amount	2,838	[5]	2,429	[5]
Derivative Asset, Fair Value, Gross Asset	174	[5]	104	[5]
Derivative Financial Instruments, Assets | Not Designated as Hedging Instrument [Member] | Credit Risk Contract [Member] | Loans | Other Assets [Member]
Derivative Asset, Notional Amount	0		0
Derivative Asset, Fair Value, Gross Asset	0		0
Derivative Financial Instruments, Assets | Not Designated as Hedging Instrument [Member] | Credit Risk Contract [Member] | Trading Activity | Trading Securities [Member]
Derivative Asset, Notional Amount	2,564	[10],[5]	2,282	[11],[5]
Derivative Asset, Fair Value, Gross Asset	23	[10],[5]	20	[11],[5]
Derivative Financial Instruments, Assets | Not Designated as Hedging Instrument [Member] | Equity Contract [Member] | Trading Activity | Trading Securities [Member]
Derivative Asset, Notional Amount	21,462	[5],[8]	21,875	[5],[9]
Derivative Asset, Fair Value, Gross Asset	2,671	[5],[8]	2,809	[5],[9]
Derivative Financial Instruments, Assets | Not Designated as Hedging Instrument [Member] | Other Contract | Loans | Trading Securities [Member]
Derivative Asset, Notional Amount	3,436	[12],[5]	2,231	[12],[5]
Derivative Asset, Fair Value, Gross Asset	45	[12],[5]	25	[12],[5]
Derivative Financial Instruments, Assets | Not Designated as Hedging Instrument [Member] | Other Contract | Trading Activity | Trading Securities [Member]
Derivative Asset, Notional Amount	443	[5]	381	[5]
Derivative Asset, Fair Value, Gross Asset	90	[5]	71	[5]
Derivative Financial Instruments, Liabilities [Member]
Derivative Liability, Notional Amount	113,383		114,144
Derivative liability positions, fair value	5,728		5,577
Derivative Liabilities	552		462
Derivative Financial Instruments, Liabilities [Member] | Designated as Hedging Instrument | Cash Flow Hedging | Interest Rate Contract [Member] | Floating Rate Loans | Trading Liabilities [Member]
Derivative Liability, Notional Amount	0	[3]	2,850	[3]
Derivative liability positions, fair value	0	[3]	8	[3]
Derivative Financial Instruments, Liabilities [Member] | Designated as Hedging Instrument | Fair Value Hedging | Interest Rate Contract [Member] | Trading Liabilities [Member]
Derivative Liability, Notional Amount	600	[4]	2,600	[4]
Derivative liability positions, fair value	0		1	[4]
Derivative Financial Instruments, Liabilities [Member] | Designated as Hedging Instrument | Fair Value Hedging | Interest Rate Contract [Member] | Fixed Rate Debt | Trading Liabilities [Member]
Derivative Liability, Notional Amount	600	[4]	2,600	[4]
Derivative liability positions, fair value	0		1	[4]
Derivative Financial Instruments, Liabilities [Member] | Designated as Hedging Instrument | Fair Value Hedging | Interest Rate Contract [Member] | Brokered Deposits [Member] | Trading Liabilities [Member]
Derivative Liability, Notional Amount	0		0
Derivative liability positions, fair value	0		0
Derivative Financial Instruments, Liabilities [Member] | Not Designated as Hedging Instrument [Member]
Derivative Liability, Notional Amount	112,783	[5]	108,694
Derivative liability positions, fair value	5,728	[5]	5,568
Derivative Financial Instruments, Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Mortgage Servicing Rights [Member] | Trading Liabilities [Member]
Derivative Liability, Notional Amount	11,891	[5]	8,807	[5]
Derivative liability positions, fair value	86	[5]	30	[5]
Derivative Financial Instruments, Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Loans | Trading Liabilities [Member]
Derivative Liability, Notional Amount	4,528	[5],[6]	4,923	[5],[7]
Derivative liability positions, fair value	24	[5],[6]	23	[5],[7]
Derivative Financial Instruments, Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Trading Activity | Trading Liabilities [Member]
Derivative Liability, Notional Amount	62,002	[5],[8]	61,065	[5],[9]
Derivative liability positions, fair value	2,371	[5],[8]	2,225	[5],[9]
Derivative Financial Instruments, Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract | Trading Activity | Trading Liabilities [Member]
Derivative Liability, Notional Amount	2,899	[5]	2,414	[5]
Derivative liability positions, fair value	168	[5]	100	[5]
Derivative Financial Instruments, Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Credit Risk Contract [Member] | Loans | Other Liabilities [Member]
Derivative Liability, Notional Amount	310	[5]	392	[5]
Derivative liability positions, fair value	4	[5]	5	[5]
Derivative Financial Instruments, Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Credit Risk Contract [Member] | Trading Activity | Trading Liabilities [Member]
Derivative Liability, Notional Amount	2,771	[10],[5]	2,452	[11],[5]
Derivative liability positions, fair value	24	[10],[5]	20	[11],[5]
Derivative Financial Instruments, Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Equity Contract [Member] | Trading Activity | Trading Liabilities [Member]
Derivative Liability, Notional Amount	27,822	[5],[8]	28,128	[5],[9]
Derivative liability positions, fair value	2,953	[5],[8]	3,090	[5],[9]
Derivative Financial Instruments, Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Other Contract | Loans | Trading Liabilities [Member]
Derivative Liability, Notional Amount	122	[12],[5]	139	[12],[5]
Derivative liability positions, fair value	8	[12],[5]	5	[12],[5]
Derivative Financial Instruments, Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Other Contract | Trading Activity | Trading Liabilities [Member]
Derivative Liability, Notional Amount	438	[5]	374	[5]
Derivative liability positions, fair value	90	[5]	70	[5]
Trading Securities [Member]
Derivative Asset, Fair Value of Collateral	(530)		(449)
Derivative Assets	$ (1,500)		$ (1,300)

[1] At March 31, 2015, $1.5 billion, net of $530 million offsetting cash collateral, is recognized in trading assets and derivative instruments within the Company's Consolidated Balance Sheets. At December 31, 2014, $1.3 billion, net of $449 million offsetting cash collateral, is recognized in trading assets and derivative instruments within the Company's Consolidated Balance Sheets.

[2] At March 31, 2015, $552 million, net of $1.1 billion offsetting cash collateral, is recognized in trading liabilities and derivative instruments within the Company's Consolidated Balance Sheets. At December 31, 2014, $462 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] See “Cash Flow Hedges” in this Note for further discussion.

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

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

[6] Amount includes $576 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.

[7] Amount includes $791 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] Amounts include $10.4 billion and $554 million of notional amounts related to interest rate futures and equity futures, respectively. These futures contracts settle in cash daily, one day in arrears. The derivative asset or liability associated with the one day lag are included in the fair value column of this table. Amounts also include notional amounts related to interest rate swaps hedging fixed rate debt.

[9] Amounts include $10.3 billion and $563 million of notional amounts related to interest rate futures and equity futures, respectively. 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] Asset and liability amounts each include $7 million and $4 million of notional amounts from purchased and written credit risk participation agreements, respectively, whose notional is calculated as the notional of the derivative participated adjusted by the relevant RWA conversion factor.

[11] Asset and liability amounts both include $4 million of notional amounts from purchased and written interest rate swap risk participation agreements, respectively, whose notional is calculated as the notional of the interest rate swap participated adjusted by the relevant RWA conversion factor.

[12] Includes $49 million notional amount that is based on the number of Visa Class B shares, 3.2 million, the conversion ratio from Class B shares to Class A shares, and the Class A share price at the derivative inception date of May 28, 2009. This derivative was established upon the sale of Class B shares in the second quarter of 2009. See Note 12, “Guarantees” for additional information.