Business Changes and Developments (Details) (USD $)	Sep. 25, 2008
Net assets acquired
Washington Mutuals net assets before fair value adjustments	$ 39,186,000,000
Washington Mutuals goodwill and other intangible assets	7,566,000,000
Subtotal	31,620,000,000
Washington Mutual [Member]
Purchase price
Purchase price	1,938,000,000
Direct acquisition costs	3,000,000
Total purchase price	1,941,000,000
Adjustments to reflect liabilities assumed at fair value:
Fair value of net assets acquired	11,999,000,000
Negative goodwill before allocation to nonfinancial assets	(10,058,000,000)
Negative goodwill allocated to nonfinancial assets	8,076,000,000
Negative goodwill resulting from the acquisition	(1,982,000,000)
Washington Mutual [Member] \| Securities [Member]
Adjustments to reflect assets acquired at fair value:
Adjustments	(16,000,000)
Washington Mutual [Member] \| Trading assets [Member]
Adjustments to reflect assets acquired at fair value:
Adjustments	(591,000,000)
Washington Mutual [Member] \| Loans [Member]
Adjustments to reflect assets acquired at fair value:
Adjustments	(30,998,000,000)
Washington Mutual [Member] \| Allowance for loan losses [Member]
Adjustments to reflect assets acquired at fair value:
Adjustments	8,216,000,000
Washington Mutual [Member] \| Premises and equipment [Member]
Adjustments to reflect assets acquired at fair value:
Adjustments	680,000,000
Adjustments to reflect liabilities assumed at fair value:
Negative goodwill allocated to nonfinancial assets	3,200,000,000
Washington Mutual [Member] \| Accrued interest and accounts receivable [Member]
Adjustments to reflect assets acquired at fair value:
Adjustments	(243,000,000)
Washington Mutual [Member] \| Other assets [Member]
Adjustments to reflect assets acquired at fair value:
Adjustments	4,010,000,000
Washington Mutual [Member] \| Core Deposits [Member]
Adjustments to reflect liabilities assumed at fair value:
Negative goodwill allocated to nonfinancial assets	4,900,000,000
Washington Mutual [Member] \| Deposits [Member]
Adjustments to reflect liabilities assumed at fair value:
Adjustments	(686,000,000)
Washington Mutual [Member] \| Other borrowed funds [Member]
Adjustments to reflect liabilities assumed at fair value:
Adjustments	68,000,000
Washington Mutual [Member] \| Other Liabilities [Member]
Adjustments to reflect liabilities assumed at fair value:
Adjustments	(1,124,000,000)
Washington Mutual [Member] \| Long-term Debt [Member]
Adjustments to reflect liabilities assumed at fair value:
Adjustments	$ 1,063,000,000

Adjustments to reflect assets acquired at fair value.

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The amount of adjustments made to reflect assets acquired at fair value when allocating the acquisition cost of a business combination.

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The amount of adjustments made to reflect liabilities assumed at fair value when allocating the acquisition cost of a business combination.

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The amount of acquisition cost of a business combination allocated to net assets acquired before the pro rata allocation of the excess to reduce amounts that otherwise would have been assigned to acquired assets.

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The total goodwill and other intangible assets of the acquired entity.

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The amount of the excess of the net assets acquired over the cost of the acquired entity in a business combination.

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The amount of the excess of the net assets acquired over the cost of the acquired entity in a business combination before the pro rata allocation of the excess to reduce amounts that otherwise would have been assigned to acquired assets.

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The total net assets of the acquired entity before adjustments to reflect assets acquired at fair value.

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The net assets of the acquired entity excluding goodwill and other intangible assets and before adjustments to reflect assets acquired at fair value.

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Net assets acquired.

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Purchase price.

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Amount of cash paid to acquire the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Statement of Financial Accounting Standard (FAS)

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The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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