|
Income Taxes (Reconciliation Of The Tax Provision At The U.S. Federal Statutory Rate To The Provision For Income Taxes) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Income Tax Disclosure [Abstract] | |||
| Earnings from continuing operations, before income tax expense | $ 457us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | $ 269us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | $ 123us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments |
| (Earnings) loss attributable to flow through noncontrolling interest | 4cnc_LessFlowThroughNoncontrollingInterest | (1)cnc_LessFlowThroughNoncontrollingInterest | 2cnc_LessFlowThroughNoncontrollingInterest |
| Earnings from continuing operations, less noncontrolling interest, before income tax expense | 461cnc_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsLessNoncontrollingInterest | 268cnc_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsLessNoncontrollingInterest | 125cnc_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsLessNoncontrollingInterest |
| Tax provision at the U.S. federal statutory rate | 162us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | 94us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | 44us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate |
| State income taxes, net of federal income tax benefit | 6us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | 3us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | (2)us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes |
| Nondeductible compensation | 1us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost | 12us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost | 1us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost |
| Benefit from reversal of prior years impact of 162(m)(6) regulations | (14)cnc_Benefitfromreversalofprioryearsimpactof162m6regulations | 0cnc_Benefitfromreversalofprioryearsimpactof162m6regulations | 0cnc_Benefitfromreversalofprioryearsimpactof162m6regulations |
| ACA Health Insurer Fee | 44cnc_ACAHealthInsurerFee | 0cnc_ACAHealthInsurerFee | 0cnc_ACAHealthInsurerFee |
| Nondeductible goodwill impairment | 0us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses | 0us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses | 8us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses |
| Other, net | (3)us-gaap_IncomeTaxReconciliationOtherReconcilingItems | (2)us-gaap_IncomeTaxReconciliationOtherReconcilingItems | (4)us-gaap_IncomeTaxReconciliationOtherReconcilingItems |
| Income tax expense | $ 196us-gaap_IncomeTaxExpenseBenefit | $ 107us-gaap_IncomeTaxExpenseBenefit | $ 47us-gaap_IncomeTaxExpenseBenefit |
| X | ||||||||||
|
- Definition
ACA Health Insurer Fee No definition available.
|
| X | ||||||||||
|
- Definition
Benefit from reversal of prior years impact of 162(m)(6) regulations No definition available.
|
| X | ||||||||||
|
- Definition
Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Less Noncontrolling Interest No definition available.
|
| X | ||||||||||
|
- Definition
Less flow through noncontrolling interest No definition available.
|
| X | ||||||||||
|
- Definition
Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible impairment loss. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible equity-based compensation costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority noncontrolling interest income (loss), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, increase (decrease) in enacted tax rate, prior year income taxes, increase (decrease) in deferred tax asset valuation allowance, and other adjustments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|