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.

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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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- Definition

Total debt and equity financial instruments including: (1) securities held-to-maturity, (2) trading securities, and (3) securities available-for-sale that are pledged to one or more secured parties who have the right to buy, sell, or re-pledge the collateral.

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- Definition

Fair value as of the balance sheet date of an asset representing net future revenues from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

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Fair Value Measurements (Details 5) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
Fair Value Measurements
Restricted investments	$ 0	$ 121
Mortgage servicing rights	1,247	1,022	1,157	1,209
Derivative assets	112	178
Derivative liabilities	71	39
Recurring basis \| Level Two
Fair Value Measurements
Restricted investments		121
Mortgage loans held for sale	1,696	2,110
Recurring basis \| Level Two \| Forward delivery commitments
Fair Value Measurements
Derivative assets	214	15
Derivative liabilities	63	19
Recurring basis \| Level Two \| Option contracts
Fair Value Measurements
Derivative assets	24	2
Recurring basis \| Level Two \| MSR-related agreements
Fair Value Measurements
Derivative assets		5
Recurring basis \| Level Two \| Interest rate contracts
Fair Value Measurements
Derivative assets	2	1
Recurring basis \| Level Three
Fair Value Measurements
Mortgage loans held for sale	55	64
Mortgage servicing rights	1,247	1,022
Recurring basis \| Level Three \| Interest rate lock commitments
Fair Value Measurements
Derivative assets	26	140
Derivative liabilities	37	1
Recurring basis \| Level Three \| Convertible note-related agreements
Fair Value Measurements
Derivative assets	12	27
Derivative liabilities	12	27
Recurring basis \| Cash Collateral and Netting \| Forward delivery commitments
Fair Value Measurements
Derivative assets	(164)	(7)
Derivative liabilities	(43)	(13)
Recurring basis \| Cash Collateral and Netting \| Option contracts
Fair Value Measurements
Derivative assets	(2)
Derivative liabilities	2
Recurring basis \| Cash Collateral and Netting \| MSR-related agreements
Fair Value Measurements
Derivative assets		(5)
Derivative liabilities		5
Recurring basis \| Total
Fair Value Measurements
Restricted investments		121
Mortgage loans held for sale	1,751	2,174
Mortgage servicing rights	1,247	1,022
Recurring basis \| Total \| Interest rate lock commitments
Fair Value Measurements
Derivative assets	26	140
Derivative liabilities	37	1
Recurring basis \| Total \| Forward delivery commitments
Fair Value Measurements
Derivative assets	50	8
Derivative liabilities	20	6
Recurring basis \| Total \| Option contracts
Fair Value Measurements
Derivative assets	22	2
Derivative liabilities	2
Recurring basis \| Total \| MSR-related agreements
Fair Value Measurements
Derivative liabilities		5
Recurring basis \| Total \| Interest rate contracts
Fair Value Measurements
Derivative assets	2	1
Recurring basis \| Total \| Convertible note-related agreements
Fair Value Measurements
Derivative assets	12	27
Derivative liabilities	$ 12	$ 27