The amount needed to reflect the estimated ultimate cost of settling claims relating to casualty insurance insured events that have occurred on or before a particular date (ordinarily, the balance sheet date) and the amount needed to provide for the estimated ultimate cost required to investigate and settle claims relating to insured events that have occurred on or before a particular date (ordinarily, the balance sheet date), whether or not reported to the insurer at that date.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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Fair Value Measurements (Narrative) (Details) (USD $)			12 Months Ended
Fair Value Measurements (Narrative) (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 Life Policy Loans [Member]	Dec. 31, 2011 Life Policy Loans [Member]	Dec. 31, 2012 Deferred Annuities And Structured Settlements [Member]	Dec. 31, 2011 Deferred Annuities And Structured Settlements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percentage of investments not priced by a pricing vendor			1.00%
Percentage of Level 3 assets measured at fair value			1.00%
Principal amount of debt	$ 793,000,000	$ 793,000,000
Finance receivable	75,000,000	76,000,000		37,000,000	37,000,000
Loss and loss expense reserves	$ 4,230,000,000	$ 4,339,000,000				$ 1,043,000,000	$ 1,025,000,000