SECURITIZATIONS AND VARIABLE INTEREST ENTITIES (Details 5) (USD $) In Billions, unless otherwise specified	Jun. 30, 2011	Dec. 31, 2010
Citibank OMNI Master Trust (Omni Trust)
Funding, Liquidity Facilities and Subordinated Interests
Weighted average maturity of term notes (in years)	2.0	1.8
Term notes issued to multi-seller commercial paper conduits	$ 3.9	$ 7.2
Term notes issued to third parties	9.2	9.2
Term notes retained by Citigroup affiliates	7.1	7.1
Total Trust liabilities	20.2	23.5
Citibank Credit Card Master Trust (Master Trust)
Funding, Liquidity Facilities and Subordinated Interests
Weighted average maturity of term notes (in years)	3.4	3.4
Term notes issued to multi-seller commercial paper conduits		0.3
Term notes issued to third parties	32.2	41.8
Term notes retained by Citigroup affiliates	8.5	3.4
Total Trust liabilities	$ 40.7	$ 45.5