SCHEDULE VI SUPPLEMENTAL INFORMATION CONCERNING PROPERTY-CASUALTY INSURANCE OPERATIONS (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
SUPPLEMENTAL INFORMATION CONCERNING PROPERTY-CASUALTY INSURANCE OPERATIONS
Deferred policy acquisition costs	$ 402	$ 364	$ 343
Reserve for unpaid losses and loss expenses	3,747	3,598	3,499
Discount, if any, deducted from reserves	85	85	84
Unearned premiums	2,598	2,365	2,178
Earned premiums	4,820	4,422	4,149
Net investment income	313	327	324
Losses and loss expenses incurred related to: Current year	3,379	3,494	3,616
Losses and loss expenses incurred related to: Prior years	(19)	(115)	(272)
Amortization of deferred policy acquisition costs	763	705	668
Net losses and loss expenses paid	3,213	3,283	3,392
Net premiums written	5,045	4,603	4,255
Consolidated P&C Entities
SUPPLEMENTAL INFORMATION CONCERNING PROPERTY-CASUALTY INSURANCE OPERATIONS
Deferred policy acquisition costs	402	364	343
Reserve for unpaid losses and loss expenses	3,747	3,598	3,499
Discount, if any, deducted from reserves	85	85	84
Unearned premiums	2,598	2,365	2,178
Earned premiums	4,820	4,422	4,149
Net investment income	313	327	324
Losses and loss expenses incurred related to: Current year	3,379	3,494	3,616
Losses and loss expenses incurred related to: Prior years	(19)	(115)	(272)
Amortization of deferred policy acquisition costs	763	705	668
Net losses and loss expenses paid	3,213	3,283	3,392
Net premiums written	$ 5,045	$ 4,603	$ 4,255
Discount rate for workers compensation case and incurred but not reported loss reserves (as a percent)	2.50%	2.50%	2.50%