SUBSEQUENT EVENTS (Details) - Subsequent events	Jan. 15, 2016 USD ($)
Subsequent Event [Line Items]
Estimated average annual expense of credit enhancement	$ 3,100,000
Financing Agreement With Golden Gate And Syndicate Of Risk Takers
Subsequent Event [Line Items]
Term of financing agreement	18 years
Financing capacity under the agreement	$ 2,188,000,000.000
Golden Gate
Subsequent Event [Line Items]
Extraordinary dividend	300,000,000
Golden Gate | Series Of Non Recourse Funding Obligations
Subsequent Event [Line Items]
Outstanding non-recourse funding obligations	800,000,000
Golden Gate | Surplus Notes | Steel City Notes
Subsequent Event [Line Items]
Amount of debt issued	2,188,000,000.000
Steel City | Surplus Notes | Golden Gate Surplus Notes
Subsequent Event [Line Items]
Amount of debt issued	$ 2,188,000,000.000