INVESTMENT OPERATIONS (Details 2) - USD ($) $ in Thousands	5 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost	$ 35,959,726
Gross Unrealized Gains	61,068
Gross Unrealized Losses	(2,200,457)
Fair Value	33,820,337
Total OTTI Recognized in OCI	(7,024)
Amortized cost and fair value of the Company's investments classified as held-to-maturity
Fair Value	489,950
Amortized Cost, Held-to-maturity
Total	565,334
Fair Value, Held-to-maturity
Fair Value	489,950
Fixed maturities:
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost	35,116,822
Gross Unrealized Gains	60,165
Gross Unrealized Losses	(2,187,959)
Fair Value	32,989,028
Total OTTI Recognized in OCI	(7,024)
Amortized cost and fair value of the Company's investments classified as held-to-maturity
Amortized Cost	565,334
Gross Unrealized Losses	(75,384)
Fair Value	489,950
Trading securities	2,700,000
Amortized Cost, Available-for-sale
Due in one year or less	849,305
Due after one year through five years	5,165,216
Due after five years through ten years	8,490,229
Due after ten years	20,612,072
Total	35,116,822
Fair Value, Available-for-sale
Due in one year or less	849,114
Due after one year through five years	5,134,165
Due after five years through ten years	8,275,719
Due after ten years	18,730,030
Total	32,989,028
Amortized Cost, Held-to-maturity
Due after ten years	565,334
Total	565,334
Fair Value, Held-to-maturity
Due after ten years	489,950
Fair Value	489,950
Residential mortgage-backed securities
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost	1,594,167
Gross Unrealized Gains	6,244
Gross Unrealized Losses	(23,585)
Fair Value	1,576,826
Commercial mortgage-backed securities
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost	1,236,987
Gross Unrealized Gains	271
Gross Unrealized Losses	(34,102)
Fair Value	1,203,156
Other asset-backed securities
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost	820,349
Gross Unrealized Gains	2,062
Gross Unrealized Losses	(22,940)
Fair Value	799,471
U.S. government-related securities
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost	1,644,086
Gross Unrealized Gains	427
Gross Unrealized Losses	(42,983)
Fair Value	1,601,530
Other government-related securities
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost	19,578
Gross Unrealized Losses	(796)
Fair Value	18,782
States, municipals, and political subdivisions
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost	1,720,059
Gross Unrealized Gains	59
Gross Unrealized Losses	(135,050)
Fair Value	1,585,068
Corporate securities
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost	28,017,234
Gross Unrealized Gains	51,102
Gross Unrealized Losses	(1,925,808)
Fair Value	26,142,528
Total OTTI Recognized in OCI	(7,024)
Preferred stocks
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost	64,362
Gross Unrealized Losses	(2,695)
Fair Value	61,667
Other.
Amortized cost and fair value of the Company's investments classified as held-to-maturity
Amortized Cost	565,334
Gross Unrealized Losses	(75,384)
Fair Value	489,950
Fair Value, Held-to-maturity
Fair Value	489,950
Equity securities
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost	685,967
Gross Unrealized Gains	903
Gross Unrealized Losses	(12,498)
Fair Value	674,372
Amortized cost and fair value of the Company's investments classified as held-to-maturity
Trading securities	8,300
Short-term investments
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost	156,937
Fair Value	156,937
Amortized cost and fair value of the Company's investments classified as held-to-maturity
Trading securities	$ 43,800
Predecessor
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost		$ 31,763,413
Gross Unrealized Gains		3,274,304
Gross Unrealized Losses		(213,419)
Fair Value		34,824,298
Total OTTI Recognized in OCI		6,309
Amortized cost and fair value of the Company's investments classified as held-to-maturity
Gross Unrealized Losses		0
Fair Value		485,422
Amortized Cost, Held-to-maturity
Total		435,000
Fair Value, Held-to-maturity
Fair Value		485,422
Predecessor | Fixed maturities:
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost		30,898,028
Gross Unrealized Gains		3,238,658
Gross Unrealized Losses		(199,266)
Fair Value		33,937,420
Total OTTI Recognized in OCI		6,309
Amortized cost and fair value of the Company's investments classified as held-to-maturity
Amortized Cost		435,000
Gross Unrealized Gains		50,422
Fair Value		485,422
Trading securities		2,800,000
Fair Value, Held-to-maturity
Fair Value		485,422
Predecessor | Residential mortgage-backed securities
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost		1,374,141
Gross Unrealized Gains		56,381
Gross Unrealized Losses		(12,264)
Fair Value		1,418,258
Total OTTI Recognized in OCI		6,404
Predecessor | Commercial mortgage-backed securities
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost		1,119,979
Gross Unrealized Gains		59,637
Gross Unrealized Losses		(2,364)
Fair Value		1,177,252
Predecessor | Other asset-backed securities
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost		857,365
Gross Unrealized Gains		17,961
Gross Unrealized Losses		(35,950)
Fair Value		839,376
Total OTTI Recognized in OCI		(95)
Predecessor | U.S. government-related securities
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost		1,394,028
Gross Unrealized Gains		44,149
Gross Unrealized Losses		(9,282)
Fair Value		1,428,895
Predecessor | Other government-related securities
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost		16,939
Gross Unrealized Gains		3,233
Fair Value		20,172
Predecessor | States, municipals, and political subdivisions
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost		1,391,526
Gross Unrealized Gains		296,594
Gross Unrealized Losses		(431)
Fair Value		1,687,689
Predecessor | Corporate securities
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost		24,744,050
Gross Unrealized Gains		2,760,703
Gross Unrealized Losses		(138,975)
Fair Value		27,365,778
Predecessor | Other.
Amortized cost and fair value of the Company's investments classified as held-to-maturity
Amortized Cost		435,000
Gross Unrealized Gains		50,422
Fair Value		485,422
Fair Value, Held-to-maturity
Fair Value		485,422
Predecessor | Equity securities
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost		713,813
Gross Unrealized Gains		35,646
Gross Unrealized Losses		(14,153)
Fair Value		735,306
Amortized cost and fair value of the Company's investments classified as held-to-maturity
Trading securities		21,500
Predecessor | Short-term investments
Amortized cost and fair value of the Company's investments classified as available-for-sale
Amortized Cost		151,572
Fair Value		151,572
Amortized cost and fair value of the Company's investments classified as held-to-maturity
Trading securities		$ 95,100