GUARANTEES AND CONTINGENCIES (Detail)	9 Months Ended
	Sep. 30, 2016 region complaint
TRICARE Contract
Loss Contingencies [Line Items]
Contract term, years	5 years
Contract expiration date	Mar. 31, 2017
Total Medicare
Loss Contingencies [Line Items]
Percentage of premiums and services revenue	74.00%
Military services
Loss Contingencies [Line Items]
Percentage of premiums and services revenue	1.00%
Number of regions | region	3
Number of regions after proposed consolidation | region	2
Medicaid
Loss Contingencies [Line Items]
Percentage of premiums and services revenue	5.00%
Pending Litigation | Solak v. Broussard et al., Litwin v. Broussard et al., Scott v. Humana Inc. et al.
Loss Contingencies [Line Items]
Number of pending claims	3
Pending Litigation | Solak v. Broussard et al., Litwin v. Broussard et al., Scott v. Humana Inc. et al. | KENTUCKY
Loss Contingencies [Line Items]
Number of pending claims	2
Pending Litigation | Solak v. Broussard et al., Litwin v. Broussard et al., Scott v. Humana Inc. et al. | DELAWARE
Loss Contingencies [Line Items]
Number of pending claims	1