SHAREHOLDERS' EQUITY - Changes in Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	$ 307	[1]	$ 1,651	[1]	$ (563)	[1]	$ 2,715	[1]
Other comprehensive income loss before reclassifications net of tax	1,294	[1]	(2,438)	[1]	2,165	[1]	(3,463)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	5	[1]	(53)	[1]	4	[1]	(92)	[1]
Other comprehensive income (loss), net of tax	1,299	[1]	(2,491)	[1]	2,169	[1]	(3,555)	[1]
Balance, end of period	1,606	[1]	(840)	[1]	1,606	[1]	(840)	[1]
Unrealized foreign currency translation gains (losses)
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(1,542)	[1]	(141)	[1]	(1,505)	[1]	333	[1]
Other comprehensive income loss before reclassifications net of tax	326	[1]	(300)	[1]	289	[1]	(770)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	0	[1]	(12)	[1]	0	[1]	(16)	[1]
Other comprehensive income (loss), net of tax	326	[1]	(312)	[1]	289	[1]	(786)	[1]
Balance, end of period	(1,216)	[1]	(453)	[1]	(1,216)	[1]	(453)	[1]
Unrealized gains (losses) on investment securities
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	1,944	[1]	1,981	[1]	1,035	[1]	2,570	[1]
Other comprehensive income loss before reclassifications net of tax	964	[1]	(2,135)	[1]	1,874	[1]	(2,686)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	7	[1]	(44)	[1]	6	[1]	(82)	[1]
Other comprehensive income (loss), net of tax	971	[1]	(2,179)	[1]	1,880	[1]	(2,768)	[1]
Balance, end of period	2,915	[1]	(198)	[1]	2,915	[1]	(198)	[1]
Unrealized gains (losses) on derivatives
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(13)	[1]	(9)	[1]	(12)	[1]	(5)	[1]
Other comprehensive income loss before reclassifications net of tax	2	[1]	(2)	[1]	1	[1]	(6)	[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	2	[1]	(2)	[1]	1	[1]	(6)	[1]
Balance, end of period	(11)	[1]	(11)	[1]	(11)	[1]	(11)	[1]
Pension liability adjustment
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(82)	[1]	(180)	[1]	(81)	[1]	(183)	[1]
Other comprehensive income loss before reclassifications net of tax	2	[1]	(1)	[1]	1	[1]	(1)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	(2)	[1]	3	[1]	(2)	[1]	6	[1]
Other comprehensive income (loss), net of tax	0	[1]	2	[1]	(1)	[1]	5	[1]
Balance, end of period	$ (82)	[1]	$ (178)	[1]	$ (82)	[1]	$ (178)	[1]

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