SHAREHOLDERS' EQUITY - Changes in Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	$ 1,606	[1]	$ (840)	[1]	$ (563)	[1]	$ 2,715	[1]
Other comprehensive income loss before reclassifications net of tax	(89)	[1]	417	[1]	2,076	[1]	(3,046)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	(17)	[1]	(38)	[1]	(13)	[1]	(130)	[1]
Other comprehensive income (loss), net of tax	(106)	[1]	379	[1]	2,063	[1]	(3,176)	[1]
Balance, end of period	1,500	[1]	(461)	[1]	1,500	[1]	(461)	[1]
Unrealized foreign currency translation gains (losses)
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(1,216)	[1]	(453)	[1]	(1,505)	[1]	333	[1]
Other comprehensive income loss before reclassifications net of tax	(589)	[1]	14	[1]	(300)	[1]	(756)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	0	[1]	21	[1]	0	[1]	5	[1]
Other comprehensive income (loss), net of tax	(589)	[1]	35	[1]	(300)	[1]	(751)	[1]
Balance, end of period	(1,805)	[1]	(418)	[1]	(1,805)	[1]	(418)	[1]
Unrealized gains (losses) on investment securities
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	2,915	[1]	(198)	[1]	1,035	[1]	2,570	[1]
Other comprehensive income loss before reclassifications net of tax	505	[1]	402	[1]	2,379	[1]	(2,284)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	(18)	[1]	(61)	[1]	(12)	[1]	(143)	[1]
Other comprehensive income (loss), net of tax	487	[1]	341	[1]	2,367	[1]	(2,427)	[1]
Balance, end of period	3,402	[1]	143	[1]	3,402	[1]	143	[1]
Unrealized gains (losses) on derivatives
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(11)	[1]	(11)	[1]	(12)	[1]	(5)	[1]
Other comprehensive income loss before reclassifications net of tax	(6)	[1]	3	[1]	(5)	[1]	(3)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	0	[1]	0	[1]	0	[1]	0	[1]
Other comprehensive income (loss), net of tax	(6)	[1]	3	[1]	(5)	[1]	(3)	[1]
Balance, end of period	(17)	[1]	(8)	[1]	(17)	[1]	(8)	[1]
Pension liability adjustment
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(82)	[1]	(178)	[1]	(81)	[1]	(183)	[1]
Other comprehensive income loss before reclassifications net of tax	1	[1]	(2)	[1]	2	[1]	(3)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	1	[1]	2	[1]	(1)	[1]	8	[1]
Other comprehensive income (loss), net of tax	2	[1]	0	[1]	1	[1]	5	[1]
Balance, end of period	$ (80)	[1]	$ (178)	[1]	$ (80)	[1]	$ (178)	[1]

[1] All amounts in the table above are net of tax.