INVESTMENT OPERATIONS (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Mar. 31, 2015
Investments classified as available-for-sale
Amortized Cost		$ 36,227,446
Gross Unrealized Gains		119,774
Gross Unrealized Losses		(645,447)
Fair Value		35,701,773
Investments classified as held-to-maturity
Fair Value		528,828
Fair Value
Fair Value		528,828
Fixed maturities
Investments classified as available-for-sale
Amortized Cost		35,307,518
Gross Unrealized Gains		115,291
Gross Unrealized Losses		(643,289)
Fair Value		34,779,520
Investments classified as held-to-maturity
Amortized Cost		551,320
Gross Unrealized Losses		(22,492)
Fair Value		528,828
Trading securities		2,900,000
Amortized Cost
Due in one year or less		891,374
Due after one year through five years		5,134,060
Due after five years through ten years		8,836,511
Due after ten years		20,445,573
Total		35,307,518
Fair Value
Due in one year or less		891,238
Due after one year through five years		5,134,012
Due after five years through ten years		8,795,750
Due after ten years		19,958,520
Total		34,779,520
Amortized Cost
Due after ten years		551,320
Total		551,320
Fair Value
Due after ten years		528,828
Fair Value		528,828
Residential mortgage-backed securities
Investments classified as available-for-sale
Amortized Cost		1,561,365
Gross Unrealized Gains		5,648
Gross Unrealized Losses		(5,746)
Fair Value		1,561,267
Commercial mortgage-backed securities
Investments classified as available-for-sale
Amortized Cost		1,199,039
Gross Unrealized Gains		1,232
Gross Unrealized Losses		(5,431)
Fair Value		1,194,840
Other asset-backed securities
Investments classified as available-for-sale
Amortized Cost		824,614
Gross Unrealized Gains		1,832
Gross Unrealized Losses		(10,282)
Fair Value		816,164
U.S. government-related securities.
Investments classified as available-for-sale
Amortized Cost		1,649,513
Gross Unrealized Gains		1,499
Gross Unrealized Losses		(13,976)
Fair Value		1,637,036
Other government-related securities
Investments classified as available-for-sale
Amortized Cost		19,516
Gross Unrealized Losses		(312)
Fair Value		19,204
States, municipals, and political subdivisions
Investments classified as available-for-sale
Amortized Cost		1,722,255
Gross Unrealized Gains		584
Gross Unrealized Losses		(44,750)
Fair Value		1,678,089
Corporate securities
Investments classified as available-for-sale
Amortized Cost		28,266,854
Gross Unrealized Gains		104,424
Gross Unrealized Losses		(562,102)
Fair Value		27,809,176
Preferred stocks
Investments classified as available-for-sale
Amortized Cost		64,362
Gross Unrealized Gains		72
Gross Unrealized Losses		(690)
Fair Value		63,744
Other
Investments classified as held-to-maturity
Amortized Cost		551,320
Gross Unrealized Losses		(22,492)
Fair Value		528,828
Amortized Cost
Total		551,320
Fair Value
Fair Value		528,828
Equity securities
Investments classified as available-for-sale
Amortized Cost		735,175
Gross Unrealized Gains		4,483
Gross Unrealized Losses		(2,158)
Fair Value		737,500
Investments classified as held-to-maturity
Trading securities		4,000
Short-term investments
Investments classified as available-for-sale
Amortized Cost		184,753
Fair Value		184,753
Investments classified as held-to-maturity
Trading securities		71,500
Predecessor
Investments classified as available-for-sale
Amortized Cost	31,832,181
Gross Unrealized Gains	3,275,752
Gross Unrealized Losses	(213,518)
Fair Value	34,894,415
Total OTTI Recognized in OCI	6,309
Investments classified as held-to-maturity
Gross Unrealized Losses	0
Fair Value	485,422
Fair Value
Fair Value	485,422
Predecessor | Fixed maturities
Investments classified as available-for-sale
Amortized Cost	30,919,422
Gross Unrealized Gains	3,237,083
Gross Unrealized Losses	(199,336)
Fair Value	33,957,169
Total OTTI Recognized in OCI	6,309
Investments classified as held-to-maturity
Amortized Cost	435,000
Gross Unrealized Gains	50,422
Fair Value	485,422
Trading securities	2,800,000
Amortized Cost
Total	435,000
Fair Value
Fair Value	485,422
Predecessor | Residential mortgage-backed securities
Investments classified as available-for-sale
Amortized Cost	1,374,206
Gross Unrealized Gains	56,330
Gross Unrealized Losses	(12,278)
Fair Value	1,418,258
Total OTTI Recognized in OCI	6,404
Predecessor | Commercial mortgage-backed securities
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
Investments classified as available-for-sale
Amortized Cost	857,441
Gross Unrealized Gains	17,885
Gross Unrealized Losses	(35,950)
Fair Value	839,376
Total OTTI Recognized in OCI	(95)
Predecessor | U.S. government-related securities.
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
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
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
Investments classified as available-for-sale
Amortized Cost	24,765,303
Gross Unrealized Gains	2,759,255
Gross Unrealized Losses	(139,031)
Fair Value	27,385,527
Predecessor | Other
Investments classified as held-to-maturity
Amortized Cost	435,000
Gross Unrealized Gains	50,422
Fair Value	485,422
Amortized Cost
Total	435,000
Fair Value
Fair Value	485,422
Predecessor | Equity securities
Investments classified as available-for-sale
Amortized Cost	757,259
Gross Unrealized Gains	38,669
Gross Unrealized Losses	(14,182)
Fair Value	781,746
Investments classified as held-to-maturity
Trading securities	21,500
Predecessor | Short-term investments
Investments classified as available-for-sale
Amortized Cost	155,500
Fair Value	155,500
Investments classified as held-to-maturity
Trading securities	$ 95,100