FAIR VALUE MEASUREMENT (Details 4) (Nonrecurring, USD $) In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Fair value
Items Measured at Fair Value on a Nonrecurring Basis
Loans held-for-sale	$ 4,184		$ 3,483
Other real estate owned	109		138
Loans	3,441	[1]	4,713	[1]
Total assets	7,734		8,334
Level 2
Items Measured at Fair Value on a Nonrecurring Basis
Loans held-for-sale	1,267		2,165
Other real estate owned	20		15
Loans	3,027	[1]	3,947	[1]
Total assets	4,314		6,127
Level 3
Items Measured at Fair Value on a Nonrecurring Basis
Loans held-for-sale	2,917		1,318
Other real estate owned	89		123
Loans	414	[1]	766	[1]
Total assets	$ 3,420		$ 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.