INVESTMENTS - Details of Holdings of Perpetual Securities (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Investment Holdings [Line Items]
Amortized Cost	$ 59,515	$ 57,646
Fair Value	61,038	61,578
Unrealized Gain (Loss)	1,523	3,932
Perpetual securities
Investment Holdings [Line Items]
Amortized Cost	2,987	4,213
Fair Value	2,947	4,302
Unrealized Gain (Loss)	(40)	89
Upper Tier II | Perpetual securities
Investment Holdings [Line Items]
Amortized Cost	1,920	2,825
Fair Value	1,913	2,919
Unrealized Gain (Loss)	(7)	94
Upper Tier II | A | Perpetual securities
Investment Holdings [Line Items]
Amortized Cost	145	460
Fair Value	183	488
Unrealized Gain (Loss)	38	28
Upper Tier II | BBB Credit Rating | Perpetual securities
Investment Holdings [Line Items]
Amortized Cost	1,563	2,077
Fair Value	1,532	2,129
Unrealized Gain (Loss)	(31)	52
Upper Tier II | BB or Lower | Perpetual securities
Investment Holdings [Line Items]
Amortized Cost	212	288
Fair Value	198	302
Unrealized Gain (Loss)	(14)	14
Tier I | Perpetual securities
Investment Holdings [Line Items]
Amortized Cost	858	1,079
Fair Value	825	1,031
Unrealized Gain (Loss)	(33)	(48)
Tier I | BBB Credit Rating | Perpetual securities
Investment Holdings [Line Items]
Amortized Cost	746	966
Fair Value	706	904
Unrealized Gain (Loss)	(40)	(62)
Tier I | BB or Lower | Perpetual securities
Investment Holdings [Line Items]
Amortized Cost	112	113
Fair Value	119	127
Unrealized Gain (Loss)	7	14
Other subordinated - non-banks | Perpetual securities
Investment Holdings [Line Items]
Amortized Cost	209	309
Fair Value	209	352
Unrealized Gain (Loss)	0	43
Other subordinated - non-banks | BBB Credit Rating | Perpetual securities
Investment Holdings [Line Items]
Amortized Cost	0	309
Fair Value	0	352
Unrealized Gain (Loss)	0	43
Other subordinated - non-banks | BB or Lower | Perpetual securities
Investment Holdings [Line Items]
Amortized Cost	209	0
Fair Value	209	0
Unrealized Gain (Loss)	$ 0	$ 0