FAIR VALUE MEASUREMENT (Details 4) (Nonrecurring, USD $) In Millions, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Fair value
Items Measured at Fair Value on a Nonrecurring Basis
Loans held-for-sale	$ 5,200		$ 3,483
Other real estate owned	121		138
Loans	3,278	[1]	4,713	[1]
Total assets	8,599		8,334
Level 2
Items Measured at Fair Value on a Nonrecurring Basis
Loans held-for-sale	1,992		2,165
Other real estate owned	19		15
Loans	2,882	[1]	3,947	[1]
Total assets	4,893		6,127
Level 3
Items Measured at Fair Value on a Nonrecurring Basis
Loans held-for-sale	3,208		1,318
Other real estate owned	102		123
Loans	396	[1]	766	[1]
Total assets	$ 3,706		$ 2,207

[1] Represents impaired loans held for investment whose carrying amount is based on the fair value of the underlying collateral, including primarily real-estate secured loans.