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Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2013
Income Taxes [Abstract]
Income Taxes	Income Taxes Our effective tax rate for the three months ended March 31, 2013 and 2012 was 33.0% and 32.8%, respectively. At March 31, 2013, our unrecognized tax benefits were $189.5 million. Of this amount, approximately $67.1 million would affect our effective tax rate upon resolution of the uncertain tax positions.

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