DEFERRED POLICY ACQUISITION COSTS AND INSURANCE EXPENSES - Additional Information (Detail) (USD $) In Billions, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Deferred Policy Acquisition Costs and Insurance Expense Disclosure [Abstract]
Consolidated policy acquisition costs deferred	$ 1.7	$ 1.6	$ 1.3
Commissions deferred as a percentage of total acquisition costs	84.00%	82.00%	82.00%
Personnel, compensation and benefit expenses as a percentage of insurance expenses	51.00%	49.00%	46.00%

Total amount of policy acquisition costs capitalized during the income statement period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6967983&loc=d3e11264-158415

Name:	us-gaap_DeferredPolicyAcquisitionCostsAdditions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration