Basis Of Presentation and Significant Accounting Policies	3 Months Ended
Mar. 31, 2014
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies	Basis of Presentation and Significant Accounting Policies Basis of Presentation: The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles, or GAAP, for interim financial reporting. Accordingly, they do not include all of the information and footnotes required by GAAP for annual financial statements. We have omitted certain footnote disclosures that would substantially duplicate the disclosures in our 2013 Annual Report on Form 10-K, unless the information contained in those disclosures materially changed or is required by GAAP. Unless otherwise specified, all financial information presented in the accompanying consolidated financial statements and in the notes to consolidated financial statements relates only to our continuing operations, other than cash flows presented on the consolidated statements of cash flows. In the opinion of management, all adjustments, including normal recurring adjustments, necessary for a fair statement of the consolidated financial statements as of and for the three months ended March 31, 2014 and 2013 have been recorded. The results of operations for the three months ended March 31, 2014 are not necessarily indicative of the results that may be expected for the full year ending December 31, 2014. These unaudited consolidated financial statements should be read in conjunction with our audited consolidated financial statements for the year ended December 31, 2013 included in our 2013 Annual Report on Form 10-K. Certain of our subsidiaries operate outside of the United States and have functional currencies other than the U.S. dollar, or USD. We translate the assets and liabilities of those subsidiaries to USD using the exchange rate in effect at the end of the period. We translate the revenues and expenses of those subsidiaries to USD using the average exchange rates in effect during the period. The net effect of these translation adjustments is included in “Foreign currency translation adjustments” in our consolidated statements of comprehensive income. Revenue Recognition: Premiums for fully-insured contracts are recognized as revenue over the period insurance coverage is provided, net of amounts recognized for minimum medical loss ratio rebates, if applicable, and the risk adjustment, reinsurance, and risk corridor premium stabilization programs of the Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Act of 2010. Premiums related to the unexpired contractual coverage periods are reflected in the accompanying consolidated balance sheets as unearned income. Premiums include revenue from retrospectively rated contracts where revenue is based on the estimated ultimate loss experience of the contract. Premium revenue includes an adjustment for retrospectively rated refunds based on an estimate of incurred claims. Premium rates for certain lines of business are subject to approval by the Department of Insurance of each respective state. Administrative fees include revenue from certain group contracts that provide for the group to be at risk for all or, with supplemental insurance arrangements, a portion of their claims experience. We charge these self-funded groups an administrative fee, which is based on the number of members in a group or the group’s claim experience. In addition, administrative fees include amounts received for the administration of Medicare or certain other government programs. Under our self-funded arrangements, revenue is recognized as administrative services are performed. All benefit payments under these programs are excluded from benefit expense. Adoption of New Accounting Pronouncement: Effective January 1, 2014, we adopted the provisions of Accounting Standards Update No. 2011-06, Other Expenses (Topic 720): Fees Paid to the Federal Government by Health Insurers (a consensus of the FASB Emerging Issues Task Force), or ASU 2011-06. The Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Act of 2010, or collectively, Health Care Reform, imposes a mandatory annual Health Insurance Provider Fee, or HIP Fee, on health insurers that write certain types of health insurance on U.S. risks. The annual HIP Fee is allocated to health insurers based on the ratio of the amount of an insurer's net premium revenues written during the preceding calendar year to the amount of health insurance for all U.S. health risk for those certain lines of business written during the preceding calendar year. This fee is non-deductible for federal income tax purposes. The total amount to be collected from allocations to health insurers in 2014 is $8,000.0, and we estimate our portion of the fee for 2014 to be approximately $920.0. ASU 2011-06 addresses how this fee should be recognized and classified in the financial statements of health insurers. In accordance with ASU 2011-06, we recorded our estimated liability for the fee in full at the beginning of the year with a corresponding deferred cost that is being amortized to expense on a straight-line basis, and we recognized $230.0 as general and administrative expense related to the fee for the three months ended March 31, 2014. The final calculation and payment of the fee will occur in the third quarter of 2014. Reclassifications: Certain prior period amounts have been reclassified to conform to the current period presentation.

Basis of Presentation and Significant Accounting Policies

Basis of Presentation: The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles, or GAAP, for interim financial reporting. Accordingly, they do not include all of the information and footnotes required by GAAP for annual financial statements. We have omitted certain footnote disclosures that would substantially duplicate the disclosures in our 2013 Annual Report on Form 10-K, unless the information contained in those disclosures materially changed or is required by GAAP. Unless otherwise specified, all financial information presented in the accompanying consolidated financial statements and in the notes to consolidated financial statements relates only to our continuing operations, other than cash flows presented on the consolidated statements of cash flows. In the opinion of management, all adjustments, including normal recurring adjustments, necessary for a fair statement of the consolidated financial statements as of and for the three months ended March 31, 2014 and 2013 have been recorded. The results of operations for the three months ended March 31, 2014 are not necessarily indicative of the results that may be expected for the full year ending December 31, 2014. These unaudited consolidated financial statements should be read in conjunction with our audited consolidated financial statements for the year ended December 31, 2013 included in our 2013 Annual Report on Form 10-K.

Certain of our subsidiaries operate outside of the United States and have functional currencies other than the U.S. dollar, or USD. We translate the assets and liabilities of those subsidiaries to USD using the exchange rate in effect at the end of the period. We translate the revenues and expenses of those subsidiaries to USD using the average exchange rates in effect during the period. The net effect of these translation adjustments is included in “Foreign currency translation adjustments” in our consolidated statements of comprehensive income.

Revenue Recognition: Premiums for fully-insured contracts are recognized as revenue over the period insurance coverage is provided, net of amounts recognized for minimum medical loss ratio rebates, if applicable, and the risk adjustment, reinsurance, and risk corridor premium stabilization programs of the Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Act of 2010. Premiums related to the unexpired contractual coverage periods are reflected in the accompanying consolidated balance sheets as unearned income. Premiums include revenue from retrospectively rated contracts where revenue is based on the estimated ultimate loss experience of the contract. Premium revenue includes an adjustment for retrospectively rated refunds based on an estimate of incurred claims. Premium rates for certain lines of business are subject to approval by the Department of Insurance of each respective state.

Administrative fees include revenue from certain group contracts that provide for the group to be at risk for all or, with supplemental insurance arrangements, a portion of their claims experience. We charge these self-funded groups an administrative fee, which is based on the number of members in a group or the group’s claim experience. In addition, administrative fees include amounts received for the administration of Medicare or certain other government programs. Under our self-funded arrangements, revenue is recognized as administrative services are performed. All benefit payments under these programs are excluded from benefit expense.

Adoption of New Accounting Pronouncement: Effective January 1, 2014, we adopted the provisions of Accounting Standards Update No. 2011-06, Other Expenses (Topic 720): Fees Paid to the Federal Government by Health Insurers (a consensus of the FASB Emerging Issues Task Force), or ASU 2011-06. The Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Act of 2010, or collectively, Health Care Reform, imposes a mandatory annual Health Insurance Provider Fee, or HIP Fee, on health insurers that write certain types of health insurance on U.S. risks. The annual HIP Fee is allocated to health insurers based on the ratio of the amount of an insurer's net premium revenues written during the preceding calendar year to the amount of health insurance for all U.S. health risk for those certain lines of business written during the preceding calendar year. This fee is non-deductible for federal income tax purposes. The total amount to be collected from allocations to health insurers in 2014 is $8,000.0, and we estimate our portion of the fee for 2014 to be approximately $920.0. ASU 2011-06 addresses how this fee should be recognized and classified in the financial statements of health insurers. In accordance with ASU 2011-06, we recorded our estimated liability for the fee in full at the beginning of the year with a corresponding deferred cost that is being amortized to expense on a straight-line basis, and we recognized $230.0 as general and administrative expense related to the fee for the three months ended March 31, 2014. The final calculation and payment of the fee will occur in the third quarter of 2014.

Reclassifications: Certain prior period amounts have been reclassified to conform to the current period presentation.