v2.4.0.8

Summary Of Significant Accounting Policies (Schedule Of Percentage Of Company's Total Revenues) (Details) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Georgia [Member] |  |  |
Percentage of revenues under contracts or subcontracts |  |  | 15.00%
Ohio [Member] |  |  |
Percentage of revenues under contracts or subcontracts |  |  | 12.00%
Texas [Member] |  |  |
Percentage of revenues under contracts or subcontracts | 37.00% | 40.00% | 21.00%

X
- Definition Percentage of revenues under contracts or subcontracts. + References No definition available. + Details
Name: | cnc_PercentageOfRevenuesUnderContractsOrSubcontracts
Namespace Prefix: | cnc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration