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Stockholders' Equity - Additional Information (Detail) (USD $) In Billions, unless otherwise specified | 9 Months Ended
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Sep. 30, 2013
Stockholders Equity [Line Items] |
Minimum Tier 1 Ratio to be well capitalized | 6.00%
Minimum combined Tier 1 and Tier 2 Ratio to be well capitalized | 10.00%
Minimum Leverage Ratio to be well capitalized | 5.00%
2015 [Member] |
Stockholders Equity [Line Items] |
Implementation of the deductions and other adjustments to CET1 | 4 years
Implementation of the deductions and other adjustments to CET1, Percentage | 40.00%
2016 [Member] |
Stockholders Equity [Line Items] |
Implementation of the capital conservation buffer, Percentage | 0.625%
Capital conservation buffer implementation phaseout period | 4 years
2019 [Member] |
Stockholders Equity [Line Items] |
Capital Conservation Buffer Maximum Level | 2.50%
After 2015 [Member] |
Stockholders Equity [Line Items] |
Implementation of the deductions and other adjustments to CET1, Additional Percentage | 20.00%
Maximum [Member] |
Stockholders Equity [Line Items] |
Quantitative limit for trust preferred securities to be included in tier 1 capital | $ 10
Minimum [Member] | 2015 [Member] |
Stockholders Equity [Line Items] |
Minimum ratio of CET1 to risk-weighted assets | 4.50%
Tier 1 capital to risk-weighted assets | 6.00%
Total capital to risk weighted assets | 8.00%
Minimum leverage ratio | 4.00%

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- Definition Common Equity Tier One Risk Based Capital To Risk Weighted Assets + References No definition available. + Details
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- Definition Quantitative Limit For Trust Preferred Securities To Be Included In Tier One Capital + References No definition available. + Details
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- Details
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- Definition Tier One Capital Conservation Buffer Maximum Level + References No definition available. + Details
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- Definition Total Capital divided by risk weighted assets as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7881181&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958568-112826 + Details
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