Derivative Positions (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Derivative Asset, Fair Value, Gross Asset	$ 5,839		$ 6,125
Derivative liability positions, fair value	5,577		5,673
Derivative Asset, Collateral, Obligation to Return Cash, Offset	4,083		(4,284)
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	4,083		(4,284)
Derivative Assets	1,307	[1]	1,384	[1]
Derivative Liabilities	462	[2]	525	[2]
Trading Liabilities [Member]
Derivative Liability, Fair Value of Collateral	1,032		(864)
Derivative Liabilities	462		525
Derivative Financial Instruments, Assets
Derivative Asset, Notional Amount	118,139		120,818
Derivative Asset, Fair Value, Gross Asset	5,839		6,125
Derivative Assets	1,307		1,384
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	18,150	[3]	17,250	[3]
Derivative Asset, Fair Value, Gross Asset	208	[3]	471	[3]
Derivative Financial Instruments, Assets | Designated as Hedging Instrument | Fair Value Hedging | Interest Rate Contract [Member] | Trading Securities [Member]
Derivative Asset, Notional Amount	2,730	[4]
Derivative Asset, Fair Value, Gross Asset	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	2,700	[4]	2,000	[4]
Derivative Asset, Fair Value, Gross Asset	30	[4]	52	[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
Derivative Asset, Fair Value, Gross Asset	0
Derivative Financial Instruments, Assets | Not Designated as Hedging Instrument [Member]
Derivative Asset, Notional Amount	97,259	[5]	101,568	[5]
Derivative Asset, Fair Value, Gross Asset	5,601	[5]	5,602	[5]
Derivative Financial Instruments, Assets | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Fixed Rate Debt | Trading Securities [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] | Interest Rate Contract [Member] | Mortgage Servicing Rights [Member] | Trading Securities [Member]
Derivative Asset, Notional Amount	5,172	[5]	1,425	[5]
Derivative Asset, Fair Value, Gross Asset	163	[5]	27	[5]
Derivative Financial Instruments, Assets | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Loans | Trading Securities [Member]
Derivative Asset, Notional Amount	1,840	[5],[6]	4,561	[5],[7]
Derivative Asset, Fair Value, Gross Asset	4	[5],[6]	30	[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	61,049	[5],[8]	70,615	[5],[9]
Derivative Asset, Fair Value, Gross Asset	2,405	[5],[8]	2,917	[5],[9]
Derivative Financial Instruments, Assets | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract | Trading Activity | Trading Securities [Member]
Derivative Asset, Notional Amount	2,429	[5]	2,449	[5]
Derivative Asset, Fair Value, Gross Asset	104	[5]	61	[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	2,282	[10],[5]	1,568	[11],[5]
Derivative Asset, Fair Value, Gross Asset	20	[10],[5]	37	[11],[5]
Derivative Financial Instruments, Assets | Not Designated as Hedging Instrument [Member] | Equity Contract [Member] | Trading Activity | Trading Securities [Member]
Derivative Asset, Notional Amount	21,875	[5],[8]	19,595	[5],[9]
Derivative Asset, Fair Value, Gross Asset	2,809	[5],[8]	2,504	[5],[9]
Derivative Financial Instruments, Assets | Not Designated as Hedging Instrument [Member] | Other Contract | Loans | Trading Securities [Member]
Derivative Asset, Notional Amount	2,231	[12],[5]	1,114	[13],[5]
Derivative Asset, Fair Value, Gross Asset	25	[12],[5]	12	[13],[5]
Derivative Financial Instruments, Assets | Not Designated as Hedging Instrument [Member] | Other Contract | Trading Activity | Trading Securities [Member]
Derivative Asset, Notional Amount	381	[5]	241	[5]
Derivative Asset, Fair Value, Gross Asset	71	[5]	14	[5]
Derivative Financial Instruments, Liabilities [Member]
Derivative Liability, Notional Amount	114,144		104,799
Derivative liability positions, fair value	5,577		5,673
Derivative Liabilities	462		525
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	2,850	[3]	0
Derivative liability positions, fair value	8	[3]	0
Derivative Financial Instruments, Liabilities [Member] | Designated as Hedging Instrument | Fair Value Hedging | Interest Rate Contract [Member] | Trading Liabilities [Member]
Derivative Liability, Notional Amount	2,600	[4]
Derivative liability positions, fair value	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	2,600	[4]	900	[4]
Derivative liability positions, fair value	1	[4]	24	[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	[4]
Derivative liability positions, fair value	0
Derivative Financial Instruments, Liabilities [Member] | Not Designated as Hedging Instrument [Member]
Derivative Liability, Notional Amount	108,694	[5]	103,899	[5]
Derivative liability positions, fair value	5,568	[5]	5,649	[5]
Derivative Financial Instruments, Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Fixed Rate Debt | Trading Liabilities [Member]
Derivative Liability, Notional Amount	60	[5]	60	[5]
Derivative liability positions, fair value	6	[5]	7	[5]
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	8,807	[5]	6,898	[5]
Derivative liability positions, fair value	30	[5]	79	[5]
Derivative Financial Instruments, Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Loans | Trading Liabilities [Member]
Derivative Liability, Notional Amount	4,923	[5],[6]	1,317	[5],[7]
Derivative liability positions, fair value	23	[5],[6]	5	[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	61,005	[5],[8]	65,299	[5],[9]
Derivative liability positions, fair value	2,219	[5],[8]	2,742	[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	2,414	[5]	2,624	[5]
Derivative liability positions, fair value	100	[5]	57	[5]
Derivative Financial Instruments, Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Credit Risk Contract [Member] | Loans | Other Liabilities [Member]
Derivative Liability, Notional Amount	392	[5]	427	[5]
Derivative liability positions, fair value	5	[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	2,452	[10],[5]	1,579	[11],[5]
Derivative liability positions, fair value	20	[10],[5]	34	[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	28,128	[5],[8]	24,712	[5],[9]
Derivative liability positions, fair value	3,090	[5],[8]	2,702	[5],[9]
Derivative Financial Instruments, Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Other Contract | Loans | Trading Liabilities [Member]
Derivative Liability, Notional Amount	139	[12],[5]	755	[13],[5]
Derivative liability positions, fair value	5	[12],[5]	4	[13],[5]
Derivative Financial Instruments, Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Other Contract | Trading Activity | Trading Liabilities [Member]
Derivative Liability, Notional Amount	374	[5]	228	[5]
Derivative liability positions, fair value	70	[5]	14	[5]
Trading Securities [Member]
Derivative Asset, Fair Value of Collateral	449		(457)
Derivative Assets	$ 1,300		$ 1,400

[1] At December 31, 2014, $1.3 billion, net of $449 million offsetting cash collateral, is recognized in trading assets and derivatives within the Company's Consolidated Balance Sheets. At December 31, 2013, $1.4 billion, net of $457 million offsetting cash collateral, is recognized in trading assets and derivatives within the Company's Consolidated Balance Sheets.

[2] At December 31, 2014, $462 million, net of $1.0 billion offsetting cash collateral, is recognized in trading liabilities and derivatives within the Company's Consolidated Balance Sheets. At December 31, 2013, $525 million, net of $864 million offsetting cash collateral, is recognized in trading liabilities and derivatives 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 $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.

[7] Amount includes $885 million of notional amounts related to interest rate futures. These futures contracts settle in cash daily, one day in arrears. The derivative liability associated with the one day lag is included in the fair value column of this table.

[8] Amounts include $10.3 billion and $563 million of notional related to interest rate futures and equity futures, respectively. These futures contracts settle in cash daily, one day in arrears. The derivative assets/liabilities associated with the one day lag are included in the fair value column of this table.

[9] Amounts include $15.2 billion and $157 million of notional related to interest rate futures and equity futures, respectively. These futures contracts settle in cash daily, one day in arrears. The derivative asset associated with the one day lag is included in the fair value column of this table.

[10] Asset and liability amounts each include $4 million of notional 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 each include $4 million and $5 million of notional 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 a 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 as discussed in Note 16, “Guarantees.” The fair value of the derivative liability, which relates to a notional amount of $49 million, is immaterial and is recognized in trading assets and derivatives in the Consolidated Balance Sheets.

[13] Includes a 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 as discussed in Note 16, “Guarantees.” The fair value of the derivative liability, which relates to a notional amount of $55 million, is immaterial and is recognized in other liabilities in the Consolidated Balance Sheets.