SHAREHOLDERS' EQUITY - Reclassifications Out of Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Sales and redemptions	$ 119		$ 78
Other-than-temporary impairment losses realized	(55)		(203)
Derivative and other gains (losses)	92		80
Acquisition and operating expenses	(1,326)		(1,392)
Total before tax	1,361		1,202
Tax (expense) or benefit	(469)		(417)
Net of tax	892		785
The expected U.S. tax rate	35.00%
Reclassification Out Of Accumulated Other Comprehensive Income
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Net of tax	38	[1]
Reclassification Out Of Accumulated Other Comprehensive Income | Unrealized foreign currency translation gains (losses)
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Sales and redemptions	10	[1]
Tax (expense) or benefit	(3)	[1],[2]
Net of tax	7	[1]
Reclassification Out Of Accumulated Other Comprehensive Income | Unrealized gains (losses) on investment securities
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Sales and redemptions	109	[1]
Other-than-temporary impairment losses realized	(55)	[1]
Total before tax	54	[1]
Tax (expense) or benefit	(19)	[1],[2]
Net of tax	35	[1]
Reclassification Out Of Accumulated Other Comprehensive Income | Pension liability adjustment
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Acquisition and operating expenses	(5)	[1],[3]
Tax (expense) or benefit	2	[1],[2]
Net of tax	(3)	[1]
Foreign currency swaps | Reclassification Out Of Accumulated Other Comprehensive Income | Unrealized gains (losses) on derivatives
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Derivative and other gains (losses)	(1)	[1]
Tax (expense) or benefit	0	[1],[2]
Net of tax	$ (1)	[1]

[1] Amounts in parentheses indicate debits.

[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 9 for additional details).