SHAREHOLDERS' EQUITY - Changes in Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012	Jun. 30, 2013		Jun. 30, 2012
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	$ 1,651	[1]		$ 2,715	[1]
Other comprehensive income loss before reclassifications net of tax	(2,438)	[1]		(3,463)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	(53)	[1]		(92)	[1]
Other comprehensive income (loss), net of tax	(2,491)	[1]	172	(3,555)	[1]	207
Balance, end of period	(840)	[1]		(840)	[1]
Unrealized foreign currency translation gains (losses)
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(141)	[1]		333	[1]
Other comprehensive income loss before reclassifications net of tax	(300)	[1]		(770)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	(12)	[1]		(16)	[1]
Other comprehensive income (loss), net of tax	(312)	[1]		(786)	[1]
Balance, end of period	(453)	[1]		(453)	[1]
Unrealized gains (losses) on investment securities
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	1,981	[1]		2,570	[1]
Other comprehensive income loss before reclassifications net of tax	(2,135)	[1]		(2,686)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	(44)	[1]		(82)	[1]
Other comprehensive income (loss), net of tax	(2,179)	[1]		(2,768)	[1]
Balance, end of period	(198)	[1]		(198)	[1]
Unrealized gains (losses) on derivatives
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(9)	[1]		(5)	[1]
Other comprehensive income loss before reclassifications net of tax	(2)	[1]		(6)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	0	[1]		0	[1]
Other comprehensive income (loss), net of tax	(2)	[1]		(6)	[1]
Balance, end of period	(11)	[1]		(11)	[1]
Pension liability adjustment
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(180)	[1]		(183)	[1]
Other comprehensive income loss before reclassifications net of tax	(1)	[1]		(1)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	3	[1]		6	[1]
Other comprehensive income (loss), net of tax	2	[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.