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GUARANTEES AND CONTINGENCIES - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended |
|---|---|---|
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Jun. 30, 2012
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Jun. 30, 2012
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| Loss Contingencies [Line Items] | ||
| Sacred Heart Complaint Settlement | $ 46 | $ 46 |
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New TRICARE South Region Contract
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| Loss Contingencies [Line Items] | ||
| Contract term, years | 5 | |
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Puerto Rico Health Insurance Administration Contracts East Southeast And Southwest Regions
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| Loss Contingencies [Line Items] | ||
| Contract term, years | 3 | |
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Medicare
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| Loss Contingencies [Line Items] | ||
| Percentage of premiums and services revenue | 71.00% | |
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Military Services
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| Loss Contingencies [Line Items] | ||
| Percentage of premiums and services revenue | 5.00% | |
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Medicaid
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| Loss Contingencies [Line Items] | ||
| Percentage of premiums and services revenue | 2.00% |