STATUTORY FINANCIAL DATA AND RESTRICTIONS (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
New York
Subsidiary Dividend Restrictions
Dividend restrictions, as percentage of statutory policyholders' surplus	10.00%
Dividend restrictions, as percentage of adjusted net investment income, as defined	100.00%
Percentage of the aggregate equity of the entity's consolidated subsidiaries restricted from transfer to parent	92.00%
Property Casualty
Statutory surplus and net income (loss)
Statutory surplus	$ 40,111	$ 40,215
Statutory net income (loss)	3,855	2,330	471
Increase (decrease) in the previously reported amount of statutory surplus as a result of the finalization of statutory filings		917
Life Insurance and Retirement Services
Statutory surplus and net income (loss)
Statutory surplus	14,692	14,184
Statutory net income (loss)	3,827	797	794
Increase (decrease) in the previously reported amount of statutory surplus as a result of the finalization of statutory filings		$ (267)