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Income Taxes (Tables) | 6 Months Ended
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Jun. 30, 2012
Income Taxes And Related Effective Tax Rates |
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
In millions |  | 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
Income (loss) before income taxes |  | $ | 795 |  |  | $ | (147) |  |  | $ | 816 |  |  | $ | (1,910) |
Provision (benefit) for income taxes |  | $ | 214 |  |  | $ | (284) |  |  | $ | 225 |  |  | $ | (772) |
Effective tax rate |  |  | 26.9% |  |  |  | 193.2% |  |  |  | 27.6% |  |  |  | 40.4% |
Change In Unrecognized Tax Benefits ("UTB") And Related Interest And Penalties To Income Tax |
In millions |  |  |
Unrecognized tax benefit as of December 31, 2011 |  | $ | 47 |
The gross amount of the increase/(decrease) in the UTB as a result of tax positions taken: |  |  |  |
During a prior year |  |  | - |
During the current year |  |  | 18 |
The amounts of decreases in the UTB related to settlements with taxing authorities |  |  | (25) |
The reduction in the UTB as a result of the applicable statute of limitations |  |  | - |
Unrecognized tax benefit as of June 30, 2012 |  | $ | 40 |

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- Definition Schedule Of Change In Unrecognized Tax Benefits ("UTB") And Related Interest And Penalties To Income Tax [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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