POLICY LIABILITIES - Changes in Liability for Unpaid Policy Claims (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Less claims paid during the year on claims incurred during:
Net balance, end of year	$ 3,630	$ 3,763
Total liability for unpaid policy claims	3,630	3,763	4,034
Health insurance
Liability for Unpaid Claims and Claims Expenses
Unpaid supplemental health claims, beginning of year	3,537	3,781	3,749
Less reinsurance recoverables	9	10	0
Net balance, beginning of year	3,528	3,771	3,749
Add claims incurred during the year related to:
Current year	6,866	7,215	8,013
Prior years	(301)	(236)	(173)
Total incurred	6,565	6,979	7,840
Less claims paid during the year on claims incurred during:
Current year	4,532	4,834	5,453
Prior years	1,873	1,931	2,082
Total paid	6,405	6,765	7,535
Effect of foreign exchange rate changes on unpaid claims	(283)	(457)	(283)
Net balance, end of year	3,405	3,528	3,771
Add reinsurance recoverables	7	9	10
Total liability for unpaid policy claims	3,412	3,537	3,781
Life insurance
Less claims paid during the year on claims incurred during:
Total liability for unpaid policy claims	$ 218	$ 226	$ 253