STATUTORY INFORMATION (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Statutory Accounting Practices [Line Items]
Dividends received from regulated subsidiaries	$ 214,700,000
Capital contributions to regulated subsidiaries	144,000,000
Statutory reserves ratio requirement (in hundredths)	200.00%
Regulated capital and surplus	2,300,000,000	1,900,000,000
Statutory deposits	71,100,000	74,000,000
Cash and investments from non-regulated businesses	$ 1,200,000,000	$ 1,400,000,000
Senior notes 5.875% due 1/15/12 [Member]
Statutory Accounting Practices [Line Items]
Stated interest rate (in hundredths)	5.875%	5.875%