VARIABLE INTEREST ENTITIES (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Assets:
Bonds available for sale	$ 238,992.0	$ 241,537.0
Other bond securities	12,772.0	13,998.0
Mortgage and other loans receivable	37,023.0	33,240.0
Other invested assets	20,822.0	24,538.0
Liabilities:
Long-term Debt	31,640.0	30,912.0
Held for sale [Member]
Assets:
Mortgage and other loans receivable		137.0
Other invested assets		2.0
Liabilities:
Long-term Debt		0.0
Real Estate and Investment Entities
Liabilities:
Off-balance sheet exposure	85.8	106.0
Securitization Vehicles
Total assets of unconsolidated VIEs as well as maximum exposure to loss
Total VIE Assets	18,100.0
Total assets of consolidated securitization vehicles owed to Parent or its subsidiaries	17,600.0
Consolidated VIE
Assets:
Bonds available for sale	9,632.0	10,233.0
Other bond securities	4,521.0	5,129.0
Mortgage and other loans receivable	2,290.0	1,547.0
Other invested assets	4,683.0	4,222.0
Other assets	2,218.0	1,995.0
Total assets	23,344.0	23,126.0
Liabilities:
Long-term Debt	4,134.0	2,973.0
Other liabilities	595.0	677.0
Total liabilities	4,729.0	3,650.0
Consolidated VIE | Real Estate and Investment Entities
Assets:
Bonds available for sale	0.0	0.0
Other bond securities	0.0	0.0
Mortgage and other loans receivable	0.0	1.0
Other invested assets	1,365.0	1,052.0
Other assets	302.0	365.0
Total assets	1,667.0	1,418.0
Liabilities:
Long-term Debt	680.0	444.0
Other liabilities	144.0	224.0
Total liabilities	824.0	668.0
Consolidated VIE | Securitization Vehicles
Assets:
Bonds available for sale	9,632.0	10,233.0
Other bond securities	4,518.0	4,858.0
Mortgage and other loans receivable	2,290.0	1,442.0
Other invested assets	206.0	321.0
Other assets	1,481.0	1,104.0
Total assets	18,127.0	17,958.0
Liabilities:
Long-term Debt	1,624.0	771.0
Other liabilities	244.0	203.0
Total liabilities	1,868.0	974.0
Total assets of unconsolidated VIEs as well as maximum exposure to loss
Total assets of consolidated securitization vehicles owed to Parent or its subsidiaries	17,600.0	17,300.0
Consolidated VIE | Structured Investment Vehicles
Assets:
Bonds available for sale	0.0	0.0
Other bond securities	0.0	266.0
Mortgage and other loans receivable	0.0	0.0
Other invested assets	0.0	0.0
Other assets	0.0	50.0
Total assets	0.0	316.0
Liabilities:
Long-term Debt	0.0	56.0
Other liabilities	0.0	1.0
Total liabilities	0.0	57.0
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	3,087.0	2,821.0
Other assets	350.0	384.0
Total assets	3,437.0	3,205.0
Liabilities:
Long-term Debt	1,825.0	1,696.0
Other liabilities	181.0	211.0
Total liabilities	2,006.0	1,907.0
Consolidated VIE | Other
Assets:
Bonds available for sale	0.0	0.0
Other bond securities	3.0	5.0
Mortgage and other loans receivable	0.0	104.0
Other invested assets	25.0	28.0
Other assets	85.0	92.0
Total assets	113.0	229.0
Liabilities:
Long-term Debt	5.0	6.0
Other liabilities	26.0	38.0
Total liabilities	31.0	44.0
Unconsolidated VIE
Assets:
Other invested assets	9,800.0	11,700.0
Total assets of unconsolidated VIEs as well as maximum exposure to loss
Total VIE Assets	387,201.0	416,665.0
Maximum Exposure to Loss, On-Balance Sheet	10,232.0	12,114.0
Maximum Exposure to Loss, Off-Balance Sheet	3,248.0	3,160.0
Total maximum exposure to loss	13,480.0	15,274.0
Unconsolidated VIE | Real Estate and Investment Entities
Total assets of unconsolidated VIEs as well as maximum exposure to loss
Total VIE Assets	380,030.0	409,087.0
Maximum Exposure to Loss, On-Balance Sheet	9,253.0	11,015.0
Maximum Exposure to Loss, Off-Balance Sheet	2,043.0	2,115.0
Total maximum exposure to loss	11,296.0	13,130.0
Unconsolidated VIE | Affordable Housing Partnerships
Total assets of unconsolidated VIEs as well as maximum exposure to loss
Total VIE Assets	4,468.0	4,709.0
Maximum Exposure to Loss, On-Balance Sheet	725.0	785.0
Maximum Exposure to Loss, Off-Balance Sheet	0.0	0.0
Total maximum exposure to loss	725.0	785.0
Unconsolidated VIE | Other
Total assets of unconsolidated VIEs as well as maximum exposure to loss
Total VIE Assets	2,703.0	2,869.0
Maximum Exposure to Loss, On-Balance Sheet	254.0	314.0
Maximum Exposure to Loss, Off-Balance Sheet	1,205.0	1,045.0
Total maximum exposure to loss	$ 1,459.0	$ 1,359.0