SCHEDULE IV REINSURANCE Schedule IV - Reinsurance (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
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Gross Amount									$ 157,022	$ 173,791	$ 168,355
Ceded to Other Companies									3,245	3,867	4,159
Assumed from Other Companies									0	0	3
Net Amount									153,777	169,924	164,199
Percentage of Amount Assumed to Net									0.00%	0.00%	0.00%
Gross Amount									20,233	22,167	20,373
Ceded to Other Companies									110	33	27
Assumed from Other companies									12	14	16
Net Amount	4,910	5,028	5,013	5,184	5,643	5,660	5,467	5,378	20,135	22,148	20,362
Percentage of Amount Assumed to Net									0.00%	0.00%	0.00%
Health insurance
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Gross Amount									15,393	17,541	17,210
Ceded to Other Companies									98	19	14
Assumed from Other companies									12	14	12
Net Amount									15,307	17,536	17,208
Percentage of Amount Assumed to Net									0.00%	0.00%	0.00%
Life insurance
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Gross Amount									4,840	4,626	3,163
Ceded to Other Companies									12	14	13
Assumed from Other companies									0	0	4
Net Amount									$ 4,828	$ 4,612	$ 3,154
Percentage of Amount Assumed to Net									0.00%	0.00%	0.00%