SIGNIFICANT ACCOUNTING POLICIES - Fair Value Financial Instruments (DETAILS) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Fair Value Financial Instruments [Line Items]
Available-for-sale Securities, Fair Value Disclosure	$ 2,026	$ 1,967
Public Fixed Maturities [Member]
Fair Value Financial Instruments [Line Items]
Available-for-sale Securities, Fair Value Disclosure	1,557	1,528
Percentage Of Available For Sale Fixed Maturity Assets Measured At Fair Value On Recurring Basis	40.90%	42.10%
Private Fixed Maturities [Member]
Fair Value Financial Instruments [Line Items]
Available-for-sale Securities, Fair Value Disclosure	469	439
Percentage Of Available For Sale Fixed Maturity Assets Measured At Fair Value On Recurring Basis	12.30%	12.10%
Fair Value Inputs Level 1 [Member]
Fair Value Financial Instruments [Line Items]
Available-for-sale Securities, Fair Value Disclosure	37	19
Percentage of Assets Measured at Fair Value on Recurring Basis	47.40%	45.90%
Fair Value Inputs Level 2 [Member]
Fair Value Financial Instruments [Line Items]
Available-for-sale Securities, Fair Value Disclosure	1,913	1,880
Percentage of Assets Measured at Fair Value on Recurring Basis	50.60%	52.20%
Mortgage- and Asset-backed Securities	20	28
Fair Value Inputs Level 3 [Member]
Fair Value Financial Instruments [Line Items]
Available-for-sale Securities, Fair Value Disclosure	76	68
Percentage of Assets Measured at Fair Value on Recurring Basis	2.00%	1.90%
Mortgage- and Asset-backed Securities	41	35
Fair Value Disclosures Broker Priced	$ 0	$ 0

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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