Derivatives (Details) (Not designated as hedging instruments, USD $)	Sep. 30, 2011	Dec. 31, 2010
Derivatives
Asset	286,000,000	409,000,000
Liability	215,000,000	182,000,000
Netting adjustments:
Offsetting receivables/payables, asset	(95,000,000)	(241,000,000)
Offsetting receivables/payables, liability	(95,000,000)	(241,000,000)
Cash collateral (paid)/received	26,000,000
Cash collateral paid/(received)	(70,000,000)	190,000,000
Net fair value of derivative instruments, asset	217,000,000	168,000,000
Net fair value of derivative instruments, liability	50,000,000	131,000,000
Common Stock \| Convertible note-related agreements
Derivatives
Notional amount (in shares)	9,688,100	9,688,100
Interest rate lock commitments
Derivatives
Asset	177,000,000	42,000,000
Liability	2,000,000	46,000,000
Notional	7,705,000,000	7,328,000,000
Forward delivery commitments
Derivatives
Notional	7,900,000,000	10,300,000,000
Forward delivery commitments not subject to master netting arrangements
Derivatives
Asset	19,000,000	61,000,000
Liability	26,000,000	14,000,000
Notional	2,946,000,000	4,703,000,000
Forward delivery commitments subject to master netting arrangements
Derivatives
Asset	66,000,000	248,000,000
Liability	173,000,000	68,000,000
Notional	16,136,000,000	16,438,000,000
Interest rate contracts
Derivatives
Asset	1,000,000	4,000,000
Notional	538,000,000	653,000,000
Option contracts
Derivatives
Asset	3,000,000
Notional	930,000,000
MSR-related agreements
Derivatives
Asset	5,000,000
Notional	1,020,000,000
Convertible note-related agreements
Derivatives
Asset	14,000,000	54,000,000
Liability	14,000,000	54,000,000
Foreign exchange contracts
Derivatives
Asset	1,000,000
Notional	48,000,000	30,000,000

Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

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The net aggregate monetary amount specified by the derivative assets and liabilities.

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- Definition

Fair value of liability associated with derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (a),(c)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

+ References

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

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The amount of the obligation to return cash collateral under master netting arrangements that have not been offset against net derivative instrument positions.

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The amount of the right to reclaim cash collateral under master netting arrangements that have not been offset against net derivative instrument positions.

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Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Aggregate notional amount of all derivatives. The notional amount relates to a number of currency units, shares, bushels, pounds, or other units specified in a derivative instrument.

+ References

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-Glossary Notional Amount

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