SECURITIZATIONS AND VARIABLE INTEREST ENTITIES (Details 8) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Variable Interest Entity
Significant unconsolidated VIE assets	$ 586,256	$ 604,858
Maximum exposure	52,298	58,473
Citicorp | Commercial and other real estate | Asset-based financing
Variable Interest Entity
Significant unconsolidated VIE assets	2,400
Maximum exposure	800
Citi Holdings | Commercial and other real estate | Asset-based financing
Variable Interest Entity
Significant unconsolidated VIE assets	5,400
Maximum exposure	700
Citicorp | Hedge funds and equities | Asset-based financing
Variable Interest Entity
Significant unconsolidated VIE assets	6,700
Maximum exposure	2,700
Citi Holdings | Corporate loans | Asset-based financing
Variable Interest Entity
Significant unconsolidated VIE assets	5,300
Maximum exposure	4,400
Citicorp | Airplanes, ships and other assets | Asset-based financing
Variable Interest Entity
Significant unconsolidated VIE assets	7,100
Maximum exposure	5,600
Citi Holdings | Airplanes, ships and other assets | Asset-based financing
Variable Interest Entity
Significant unconsolidated VIE assets	4,800
Maximum exposure	1,600
Citicorp
Variable Interest Entity
Significant unconsolidated VIE assets	338,270	322,728
Maximum exposure	39,569	41,851
Citicorp | Asset-based financing
Variable Interest Entity
Significant unconsolidated VIE assets	16,200
Maximum exposure	9,100
Citi Holdings
Variable Interest Entity
Significant unconsolidated VIE assets	247,986	282,130
Maximum exposure	12,729	16,622
Citi Holdings | Asset-based financing
Variable Interest Entity
Significant unconsolidated VIE assets	15,500
Maximum exposure	$ 6,700