The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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

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-Name Accounting Standards Codification

-Topic 230

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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Intangible Assets, Amortization Expense (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Six months ended June 30, 2013 (actual)	$ 377	$ 418	$ 754	$ 837
Finite Lived Intangible Assets [Member]
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Six months ended June 30, 2013 (actual)	880
Estimate for the remainder of 2013	874		874
Estimate for year ended December 31,
2014	1,583		1,583
2015	1,440		1,440
2016	1,289		1,289
2017	1,163		1,163
2018	1,032		1,032
Amortized MSRs [Member]
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Six months ended June 30, 2013 (actual)	124
Estimate for the remainder of 2013	122		122
Estimate for year ended December 31,
2014	220		220
2015	191		191
2016	158		158
2017	117		117
2018	79		79
Core deposit intangibles [Member]
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Six months ended June 30, 2013 (actual)	621
Estimate for the remainder of 2013	620		620
Estimate for year ended December 31,
2014	1,113		1,113
2015	1,022		1,022
2016	919		919
2017	851		851
2018	769		769
Customer Relationships And Other [Member]
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Six months ended June 30, 2013 (actual)	135
Estimate for the remainder of 2013	132		132
Estimate for year ended December 31,
2014	250		250
2015	227		227
2016	212		212
2017	195		195
2018	$ 184		$ 184