Income Taxes	9 Months Ended
Sep. 30, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes During the three months ended September 30, 2013 and 2012, we recognized income tax expense of $226.6 and $334.5, respectively, which represents effective tax rates of 25.7% and 32.6%, respectively. The decrease in income tax expense was due to a lower effective rate in 2013 as well as decreased income before income tax expense. The 2013 effective tax rate includes benefits resulting from a favorable tax election made subsequent to the Amerigroup acquisition. The 2012 effective tax rate reflects a benefit from the settlement with the Internal Revenue Service, or IRS, of a portion of our open tax issues related to taxes at certain of our acquired companies incurred prior to our acquisition of these companies. This benefit was partially offset by an increase in our state deferred tax asset valuation allowance attributable to the uncertainty associated with some of our state net operating loss carryforwards. During the nine months ended September 30, 2013 and 2012, we recognized income tax expense of $1,038.9 and $1,192.8, respectively, which represents effective tax rates of 30.7% and 35.2%, respectively. The decrease in income tax expense was due to a lower effective rate in 2013. The 2013 effective tax rate includes benefits resulting from a favorable tax election made subsequent to the Amerigroup acquisition and from inclusion of Amerigroup in our state apportionment factors calculation, which produces a lower effective state tax rate. The 2012 effective tax rate reflects the non-tax deductibility of litigation settlement expenses associated with the settlement of a class action lawsuit in June 2012 and the increase in our state deferred tax asset valuation allowance. This was partially offset by the settlement with the IRS of a portion of our open tax issues related to certain of our acquired companies.

Income Taxes

9 Months Ended

Sep. 30, 2013

During the three months ended September 30, 2013 and 2012, we recognized income tax expense of $226.6 and $334.5, respectively, which represents effective tax rates of 25.7% and 32.6%, respectively. The decrease in income tax expense was due to a lower effective rate in 2013 as well as decreased income before income tax expense. The 2013 effective tax rate includes benefits resulting from a favorable tax election made subsequent to the Amerigroup acquisition. The 2012 effective tax rate reflects a benefit from the settlement with the Internal Revenue Service, or IRS, of a portion of our open tax issues related to taxes at certain of our acquired companies incurred prior to our acquisition of these companies. This benefit was partially offset by an increase in our state deferred tax asset valuation allowance attributable to the uncertainty associated with some of our state net operating loss carryforwards.

During the nine months ended September 30, 2013 and 2012, we recognized income tax expense of $1,038.9 and $1,192.8, respectively, which represents effective tax rates of 30.7% and 35.2%, respectively. The decrease in income tax expense was due to a lower effective rate in 2013. The 2013 effective tax rate includes benefits resulting from a favorable tax election made subsequent to the Amerigroup acquisition and from inclusion of Amerigroup in our state apportionment factors calculation, which produces a lower effective state tax rate. The 2012 effective tax rate reflects the non-tax deductibility of litigation settlement expenses associated with the settlement of a class action lawsuit in June 2012 and the increase in our state deferred tax asset valuation allowance. This was partially offset by the settlement with the IRS of a portion of our open tax issues related to certain of our acquired companies.