Schedule IV (SUPPLEMENTAL INFORMATION CONCERNING REINSURANCE) (Details) (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
Supplemental Schedule of Reinsurance Premiums for Insurance Companies [Abstract]
Direct Amount									$ 18,856	$ 17,802	$ 17,534
Ceded To Other Companies									5,722	5,427	5,496
Assumed From Other Companies									3,479	3,302	3,349
Net Amount	$ 4,363	$ 4,610	$ 4,067	$ 3,573	$ 3,848	$ 4,665	$ 3,783	$ 3,381	$ 16,613	$ 15,677	$ 15,387
Percentage of Amount Assumed to Net									21.00%	21.00%	22.00%