SHAREHOLDERS' EQUITY - Changes in Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	$ (840)	[1]		$ 2,715	[1]
Other comprehensive income loss before reclassifications net of tax	417	[1]		(3,046)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	(38)	[1]		(130)	[1]
Other comprehensive income (loss), net of tax	379	[1]	915	(3,176)	[1]	1,122
Balance, end of period	(461)	[1]		(461)	[1]
Unrealized foreign currency translation gains (losses)
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(453)	[1]		333	[1]
Other comprehensive income loss before reclassifications net of tax	14	[1]		(756)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	21	[1]		5	[1]
Other comprehensive income (loss), net of tax	35	[1]		(751)	[1]
Balance, end of period	(418)	[1]		(418)	[1]
Unrealized gains (losses) on investment securities
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(198)	[1]		2,570	[1]
Other comprehensive income loss before reclassifications net of tax	402	[1]		(2,284)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	(61)	[1]		(143)	[1]
Other comprehensive income (loss), net of tax	341	[1]		(2,427)	[1]
Balance, end of period	143	[1]		143	[1]
Unrealized gains (losses) on derivatives
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(11)	[1]		(5)	[1]
Other comprehensive income loss before reclassifications net of tax	3	[1]		(3)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	0	[1]		0	[1]
Other comprehensive income (loss), net of tax	3	[1]		(3)	[1]
Balance, end of period	(8)	[1]		(8)	[1]
Pension liability adjustment
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(178)	[1]		(183)	[1]
Other comprehensive income loss before reclassifications net of tax	(2)	[1]		(3)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	2	[1]		8	[1]
Other comprehensive income (loss), net of tax	0	[1]		5	[1]
Balance, end of period	$ (178)	[1]		$ (178)	[1]

[1] All amounts in the table above are net of tax. Amounts in parentheses indicate debits.