Income Taxes	3 Months Ended
Mar. 31, 2013
Income Taxes [Abstract]
Income Taxes	NOTE 9: Income Taxes For both the first quarter of 2013 and the first quarter of 2012, the Corporation recognized income tax expense of $21 million. The effective tax rate was 31.06% for the first quarter of 2013, compared to an effective tax rate of 32.70% for the first quarter of 2012.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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+ Details