BUSINESS SEGMENTS (Details 2) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Segment reporting information
Identifiable assets	$ 1,894,736	$ 1,880,382
Total Citicorp and Corporate/Other
Segment reporting information
Identifiable assets	1,781,000	1,763,000
Global Consumer Banking
Segment reporting information
Identifiable assets	398,000	405,000
Institutional Clients Group
Segment reporting information
Identifiable assets	1,060,000	1,045,000
Corporate/Other
Segment reporting information
Identifiable assets	323,000	313,000
Citi Holdings
Segment reporting information
Identifiable assets	$ 114,000	$ 117,000