INVESTMENTS - Components of Net Investment Income (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income									$ 3,371	$ 3,520	$ 3,309
Less investment expenses									78	47	29
Net investment income	826	821	813	833	876	869	845	882	3,293	3,473	3,280
Fixed Maturities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income									3,210	3,248	3,026
Perpetual securities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income									153	253	274
Equity securities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income									7	17	5
Short Term Investments and Cash Equivalents
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income									$ 1	$ 2	$ 4