v2.4.0.6

Stockholders' Equity (Narrative) (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	9 Months Ended	105 Months Ended	9 Months Ended				9 Months Ended
	Jan. 27, 2012	Jan. 27, 2012	Jan. 27, 2012 Stock Options [Member]	Jan. 27, 2012 Restricted Stock Units [Member]	Jan. 27, 2012 Bank Of America N.A. [Member]	Jul. 08, 2011 Bank Of America N.A. [Member]	Jan. 27, 2012 Wells Fargo [Member]	Aug. 19, 2011 Wells Fargo [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to options, total			$ 80,800,000	$ 340,800,000
Unrecognized compensation expense will be amortized on a straight-line basis over a weighted-average remaining period, in years			2.2	2.7
Percentage of discount from quoted market price, employees entitled to buy shares (ESPP)	15.00%
Valuation assumption, expected dividends	0
Repurchase and retirement of common stock, shares	14.6				4.1		10.5
Cumulative shares repurchased and shares repurchased and retired		119.0
Weighted-average price of common stock repurchased under repurchase program		$ 29.65
Aggregate purchase price of common stock authorized under repurchase program		3,500,000,000
Stock repurchase program, authorized amount	4,000,000,000
Common stock available under authorization of repurchase plan	500,000,000
Prepayment to purchase shares of common stock	$ 600,000,000	$ 600,000,000				$ 200,000,000		$ 400,000,000
Accelerated share repurchases, weighted-average price					$ 48.30		$ 38.08

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Cumulative Shares Repurchased And Shares Repurchased And Retired

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Final price paid per share for the purchase of the targeted number of shares, determined by an average market price over a fixed period of time.

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Dollar amount of the cash payment to or cash received from the bank; or the stock issuance to (stock received from) the bank in the settlement of the accelerated share repurchase agreement.

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As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

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The weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, using a decimal to express in number of years.

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The cash outflow to reacquire common and preferred stock.

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The estimated amount of dividends to be paid to holders of the underlying shares (expected dividends) over the option's term. Dividends are taken into account because payment of dividends to shareholders reduces the fair value of the underlying shares, and option holders generally do not receive dividends.

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Number of shares that have been repurchased and retired during the period.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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