SHAREHOLDERS' EQUITY - Changes in Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	$ (563)	[1]	$ 2,715	[1]
Other comprehensive income loss before reclassifications net of tax	894	[1]	(1,026)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	(24)	[1]	(38)	[1]
Other comprehensive income (loss), net of tax	870	[1]	(1,064)	[1]
Balance, end of period	307	[1]	1,651	[1]
Unrealized foreign currency translation gains (losses)
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(1,505)	[1]	333	[1]
Other comprehensive income loss before reclassifications net of tax	(14)	[1]	(467)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	(23)	[1]	(7)	[1]
Other comprehensive income (loss), net of tax	(37)	[1]	(474)	[1]
Balance, end of period	(1,542)	[1]	(141)	[1]
Unrealized gains (losses) on investment securities
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	1,035	[1]	2,570	[1]
Other comprehensive income loss before reclassifications net of tax	910	[1]	(554)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	(1)	[1]	(35)	[1]
Other comprehensive income (loss), net of tax	909	[1]	(589)	[1]
Balance, end of period	1,944	[1]	1,981	[1]
Unrealized gains (losses) on derivatives
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(12)	[1]	(5)	[1]
Other comprehensive income loss before reclassifications net of tax	(1)	[1]	(5)	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	0	[1]	1	[1]
Other comprehensive income (loss), net of tax	(1)	[1]	(4)	[1]
Balance, end of period	(13)	[1]	(9)	[1]
Pension liability adjustment
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(81)	[1]	(183)	[1]
Other comprehensive income loss before reclassifications net of tax	(1)	[1]	0	[1]
Amounts reclassified from accumulated other comprehensive income net of tax	0	[1]	3	[1]
Other comprehensive income (loss), net of tax	(1)	[1]	3	[1]
Balance, end of period	$ (82)	[1]	$ (180)	[1]

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