VARIABLE INTEREST ENTITIES (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Assets:
Bonds available for sale	$ 248,245.0	$ 259,859.0
Other bond securities	16,782.0	19,712.0
Mortgage and other loans receivable	29,565.0	24,990.0
Other invested assets	29,794.0	34,518.0
Liabilities:
Long-term debt (portion measured at fair value: 2015 - $3,670; 2014 - $5,466)	29,350.0	31,217.0
Total assets of unconsolidated VIEs as well as maximum exposure to loss
Other invested assets	29,794.0	34,518.0
Real Estate and Investment Funds
Liabilities:
Off-balance sheet exposure	131.2	56.4
Structured Investment Vehicles | Minimum
Assets:
Total assets	0.0	0.0
Consolidated VIE
Assets:
Bonds available for sale	10,324.0	11,494.0
Other bond securities	6,167.0	7,906.0
Mortgage and other loans receivable	2,093.0	2,560.0
Other invested assets	3,598.0	2,941.0
Other assets	1,924.0	1,752.0
Total assets	24,106.0	26,653.0
Liabilities:
Long-term debt (portion measured at fair value: 2015 - $3,670; 2014 - $5,466)	2,597.0	1,697.0
Other liabilities	556.0	446.0
Total liabilities	3,153.0	2,143.0
Total assets of unconsolidated VIEs as well as maximum exposure to loss
Other invested assets	3,598.0	2,941.0
Consolidated VIE | Real Estate and Investment Funds
Assets:
Bonds available for sale	0.0	0.0
Other bond securities	0.0	0.0
Mortgage and other loans receivable	1.0	0.0
Other invested assets	489.0	577.0
Other assets	29.0	40.0
Total assets	519.0	617.0
Liabilities:
Long-term debt (portion measured at fair value: 2015 - $3,670; 2014 - $5,466)	0.0	69.0
Other liabilities	34.0	32.0
Total liabilities	34.0	101.0
Total assets of unconsolidated VIEs as well as maximum exposure to loss
Other invested assets	489.0	577.0
Consolidated VIE | Securitization Vehicles
Assets:
Bonds available for sale	10,309.0	11,459.0
Other bond securities	5,756.0	7,251.0
Mortgage and other loans receivable	1,960.0	2,398.0
Other invested assets	477.0	651.0
Other assets	1,349.0	1,447.0
Total assets	19,851.0	23,206.0
Liabilities:
Long-term debt (portion measured at fair value: 2015 - $3,670; 2014 - $5,466)	1,025.0	1,370.0
Other liabilities	236.0	276.0
Total liabilities	1,261.0	1,646.0
Total assets of unconsolidated VIEs as well as maximum exposure to loss
Other invested assets	477.0	651.0
Consolidated VIE | Structured Investment Vehicles
Assets:
Bonds available for sale	0.0	0.0
Other bond securities	387.0	615.0
Mortgage and other loans receivable	0.0	0.0
Other invested assets	0.0	0.0
Other assets	94.0	140.0
Total assets	481.0	755.0
Liabilities:
Long-term debt (portion measured at fair value: 2015 - $3,670; 2014 - $5,466)	53.0	52.0
Other liabilities	1.0	0.0
Total liabilities	54.0	52.0
Total assets of unconsolidated VIEs as well as maximum exposure to loss
Other invested assets	0.0	0.0
Consolidated VIE | Affordable Housing Partnerships
Assets:
Bonds available for sale	0.0	0.0
Other bond securities	0.0	0.0
Mortgage and other loans receivable	0.0	0.0
Other invested assets	2,608.0	1,684.0
Other assets	293.0	49.0
Total assets	2,901.0	1,733.0
Liabilities:
Long-term debt (portion measured at fair value: 2015 - $3,670; 2014 - $5,466)	1,513.0	199.0
Other liabilities	214.0	101.0
Total liabilities	1,727.0	300.0
Total assets of unconsolidated VIEs as well as maximum exposure to loss
Other invested assets	2,608.0	1,684.0
Consolidated VIE | Other
Assets:
Bonds available for sale	15.0	35.0
Other bond securities	24.0	40.0
Mortgage and other loans receivable	132.0	162.0
Other invested assets	24.0	29.0
Other assets	159.0	76.0
Total assets	354.0	342.0
Liabilities:
Long-term debt (portion measured at fair value: 2015 - $3,670; 2014 - $5,466)	6.0	7.0
Other liabilities	71.0	37.0
Total liabilities	77.0	44.0
Total assets of unconsolidated VIEs as well as maximum exposure to loss
Other invested assets	24.0	29.0
Unconsolidated VIE
Assets:
Other invested assets	3.8	3.2
Total assets of unconsolidated VIEs as well as maximum exposure to loss
Total VIE Assets	28,316.0	29,819.0
Maximum Exposure to Loss, On-Balance Sheet	4,061.0	3,514.0
Maximum Exposure to Loss, Off-Balance Sheet	1,398.0	1,446.0
Total maximum exposure to loss	5,459.0	4,960.0
Other invested assets	3.8	3.2
Unconsolidated VIE | Real Estate and Investment Funds
Total assets of unconsolidated VIEs as well as maximum exposure to loss
Total VIE Assets	21,951.0	19,949.0
Maximum Exposure to Loss, On-Balance Sheet	3,072.0	2,785.0
Maximum Exposure to Loss, Off-Balance Sheet	398.0	454.0
Total maximum exposure to loss	3,470.0	3,239.0
Unconsolidated VIE | Affordable Housing Partnerships
Total assets of unconsolidated VIEs as well as maximum exposure to loss
Total VIE Assets	5,255.0	7,911.0
Maximum Exposure to Loss, On-Balance Sheet	774.0	425.0
Maximum Exposure to Loss, Off-Balance Sheet	0.0	0.0
Total maximum exposure to loss	774.0	425.0
Unconsolidated VIE | Other
Total assets of unconsolidated VIEs as well as maximum exposure to loss
Total VIE Assets	1,110.0	1,959.0
Maximum Exposure to Loss, On-Balance Sheet	215.0	304.0
Maximum Exposure to Loss, Off-Balance Sheet	1,000.0	992.0
Total maximum exposure to loss	1,215.0	1,296.0
Unconsolidated VIE | Other | As Previously Reported
Total assets of unconsolidated VIEs as well as maximum exposure to loss
Maximum Exposure to Loss, On-Balance Sheet		32.0
Maximum Exposure to Loss, Off-Balance Sheet		$ 0.0
Unconsolidated VIE | Maiden Lane II and III interests
Total assets of unconsolidated VIEs as well as maximum exposure to loss
Total VIE Assets	0.0
Maximum Exposure to Loss, On-Balance Sheet	0.0
Maximum Exposure to Loss, Off-Balance Sheet	0.0
Total maximum exposure to loss	$ 0.0