HELD-FOR-SALE CLASSIFICATION (Details) - USD ($)		3 Months Ended	6 Months Ended	12 Months Ended
	Jul. 01, 2017	Jun. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Mar. 31, 2017	Aug. 15, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Assets:
Mortgage and other loans receivable, net		$ 34,642,000,000	$ 34,642,000,000	$ 33,240,000,000
Other invested assets		23,132,000,000	23,132,000,000	24,538,000,000
Short-term investments		12,094,000,000	12,094,000,000	12,302,000,000
Cash		2,517,000,000	2,517,000,000	1,868,000,000			$ 1,784,000,000		$ 1,629,000,000
Accrued investment income		2,337,000,000	2,337,000,000	2,495,000,000
Premiums and other receivables, net of allowance		10,921,000,000	10,921,000,000	10,465,000,000
Reinsurance assets, net of allowance		34,510,000,000	34,510,000,000	21,901,000,000
Deferred policy acquisition costs		11,063,000,000	11,063,000,000	11,042,000,000
Other assets		9,852,000,000	9,852,000,000	10,815,000,000
Total assets held for sale		555,000,000	555,000,000	7,199,000,000
Liabilities:
Liability for unpaid losses and loss adjustment expenses		76,422,000,000	76,422,000,000	77,077,000,000	$ 76,050,000,000		$ 74,142,000,000	$ 73,946,000,000	$ 74,942,000,000
Unearned premiums		19,992,000,000	19,992,000,000	19,634,000,000
Future policy benefits for life and accident and health insurance contracts		43,252,000,000	43,252,000,000	42,204,000,000
Other policyholder funds		4,613,000,000	4,613,000,000	3,989,000,000
Long-term Debt		31,812,000,000	31,812,000,000	30,912,000,000
Other Liabilities		28,135,000,000	28,135,000,000	26,296,000,000
Total liabilities held for sale		827,000,000	827,000,000	6,106,000,000
Held for sale [Member]
Assets:
Fixed maturity securities		147,000,000	147,000,000	6,045,000,000
Equity Securities		9,000,000	9,000,000	149,000,000
Mortgage and other loans receivable, net		2,000,000	2,000,000	137,000,000
Other invested assets		33,000,000	33,000,000	2,000,000
Short-term investments		137,000,000	137,000,000	130,000,000
Cash		67,000,000	67,000,000	133,000,000
Accrued investment income		3,000,000	3,000,000	21,000,000
Premiums and other receivables, net of allowance		276,000,000	276,000,000	351,000,000
Reinsurance assets, net of allowance		0	0	8,000,000
Deferred policy acquisition costs		0	0	471,000,000
Other assets		41,000,000	41,000,000	273,000,000
Assets of businesses held for sale		715,000,000	715,000,000	7,720,000,000
Less: Loss Accrual		(160,000,000)	(160,000,000)	(521,000,000)
Total assets held for sale		555,000,000	555,000,000	7,199,000,000
Liabilities:
Liability for unpaid losses and loss adjustment expenses		410,000,000	410,000,000	402,000,000
Unearned premiums		274,000,000	274,000,000	297,000,000
Future policy benefits for life and accident and health insurance contracts		0	0	4,579,000,000
Other policyholder funds		0	0	378,000,000
Long-term Debt		6,000,000	6,000,000	0
Other Liabilities		137,000,000	137,000,000	450,000,000
Total liabilities held for sale		827,000,000	827,000,000	6,106,000,000
Excluded net intercompany assets		394,000,000	394,000,000	384,000,000
United Guaranty | Held for sale [Member]
Held-for-Sale Classification
Voting interest in subsidiary, Percent						100.00%
Consideration in cash	$ 40,000,000
Cash consideration retained by buyer				$ 40,000,000
Certain insurance operations | Held for sale [Member]
Held-for-Sale Classification
Consideration in cash		$ 48,000,000	$ 234,000,000