DEBT (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Short-Term Borrowings:
Commercial paper	$ 17,878,000,000	$ 11,470,000,000
Other short-term borrowings	41,066,000,000	40,557,000,000
Weighted average coupon rate of other short-term borrowings (as a percent)	0.87%	1.06%
Total short-term borrowings	58,944,000,000	52,027,000,000
Collateralized short-term advances from Federal Home Loan Bank	11,000,000,000	4,000,000,000
Significant Citibank Entities
Short-Term Borrowings:
Commercial paper	17,677,000,000	11,092,000,000
Weighted average coupon (as a percent)	0.25%	0.36%
Parent
Short-Term Borrowings:
Commercial paper	201,000,000	378,000,000
Weighted average coupon (as a percent)	1.11%	0.84%
Total short-term borrowings	$ 382,000,000	$ 725,000,000