SCHEDULE VI - SUPPLEMENTARY INFORMATION CONCERNING CONSOLIDATED PROPERTY-CASUALTY INSURANCE OPERATIONS (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
SCHEDULE VI - SUPPLEMENTARY INFORMATION CONCERNING CONSOLIDATED PROPERTY-CASUALTY INSURANCE OPERATIONS
Deferred policy acquisition costs	$ 1,625	$ 1,396	$ 1,348
Reserves for insurance claims and claims expense	21,857	21,288	20,375
Unearned premiums	10,917	10,345	10,023
Earned premiums	27,618	26,737	25,942
Net investment income	1,375	1,326	1,201
Claims and claims adjustment expense incurred:
Current year	18,032	19,149	20,496
Prior years	(121)	(665)	(335)
Amortization of deferred policy acquisition costs	3,674	3,483	3,477
Paid claims and claims adjustment expense	17,996	18,980	20,195
Premiums written	$ 28,164	$ 27,027	$ 25,980