SHAREHOLDERS' EQUITY - Reclassifications Out of Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended					9 Months Ended
	Sep. 30, 2014		Jun. 30, 2014	Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Sales and redemptions	$ 33			$ 72		$ 171		$ 277
Other than temporary impairment losses realized	0	[1]	(28)	(10)	[1]	(31)	[1]	(65)	[1]
Total before tax	1,074			1,069		3,416		3,788
Income tax (expense) or benefit	(368)			(367)		(1,168)		(1,305)
Net of tax	706			702		2,248		2,483
The expected U.S. tax rate	35.00%			35.00%		35.00%		35.00%
Reclassification Out Of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net of tax	17			38		13		130
Reclassification Out Of Accumulated Other Comprehensive Income | Unrealized foreign currency translation gains (losses)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Sales and redemptions				(32)				(8)
Income tax (expense) or benefit				11	[2]			3	[2]
Net of tax				(21)				(5)
Reclassification Out Of Accumulated Other Comprehensive Income | Unrealized gains (losses) on investment securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Sales and redemptions	27			104		21		285
Other than temporary impairment losses realized	0			(10)		(3)		(65)
Total before tax	27			94		18		220
Income tax (expense) or benefit	(9)	[2]		(33)	[2]	(6)	[2]	(77)	[2]
Net of tax	18			61		12		143
Reclassification Out Of Accumulated Other Comprehensive Income | Pension liability adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Acquisition and operating expenses, actuarial gains (losses)	(5)	[3]		(4)	[3]	(11)	[3]	(13)	[3]
Acquisition and operating expenses, prior service (cost) credit	4	[3]				13	[3]
Income tax (expense) or benefit	0	[2]		2	[2]	(1)	[2]	5	[2]
Net of tax	$ (1)			$ (2)		$ 1		$ (8)

[1] Includes $0 and $1 for the nine-month periods ended September 30, 2014 and 2013, respectively, for impairments due to severity and duration of decline in fair value; $0 and $10 for the three-month periods and $31 and $64 for the nine-month periods ended September 30, 2014 and 2013, respectively, from change in intent to sell securities

[2] Based on 35% tax rate

[3] These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 10 for additional details).