CONSOLIDATED STATEMENT OF CASH FLOWS (UNAUDITED) (Parenthetical) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Proceeds from maturities of investments	[1],[2]	$ 51,034	$ 24,210
Purchases of investments	[1],[2]	52,708	66,156
Deposits that do not meet the definition of cash equivalents		5,000
Other Noncash Income (Expense)	[1],[2]	$ (2,978)	7,497
Certificates of deposit | Revision of Prior Period, Reclassification, Adjustment One
Proceeds from maturities of investments			(4,100)
Other Noncash Income (Expense)			4,100
Certificates of deposit | Revision of Prior Period, Reclassification, Adjustment Two
Purchases of investments			(41)
Other Noncash Income (Expense)			$ 41

[1] 2022 amounts have been revised to conform to the current-period presentation.

[2] Consistent with the revisions disclosed in “Statement of Cash Flows” in Note 1 to the Consolidated Financial Statements in Citi’s 2022 Form 10-K, during the three months ended March 31, 2022, $4.1 billion of cash flows related to maturities of short-term negotiable certificates of deposit (NCDs) and $41 million of cash flows related to purchases of short-term NCDs were reclassified from purchases and maturities of AFS securities within investing activities to Other, net within operating activities.