SCHEDULE IV REINSURANCE (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Total Premiums
Gross amount (direct)	$ 4,272	$ 4,043	$ 3,906
Ceded to other companies	79	76	79
Assumed from other companies	21	20	42
Net amount	4,214	3,987	3,869
Percentage of amount assumed to net	0.50%	0.50%	1.10%
Life Insurance in Force
Total Premiums
Gross amount (direct) in force	42,086	40,431	38,961
Ceded life insurance in force	22,753	22,303	20,858
Assumed from other companies	0	0	0
Net amount in force	19,333	18,128	18,103
Percentage of amount assumed to net	0.00%	0.00%	0.00%
Life insurance premiums for the year
Total Premiums
Gross amount (direct)	108	104	100
Ceded to other companies	43	42	39
Assumed from other companies	0	0	0
Net amount	65	62	61
Percentage of amount assumed to net	0.00%	0.00%	0.00%
Property and liability insurance premiums for the year
Total Premiums
Gross amount (direct)	4,164	3,939	3,806
Ceded to other companies	36	34	40
Assumed from other companies	21	20	42
Net amount	$ 4,149	$ 3,925	$ 3,808
Percentage of amount assumed to net	0.50%	0.50%	1.10%