Citigroup (C) 10-Q 4 Aug 21 2021 Q2 Quarterly report Financial data

Cover Page

Cover Page	6 Months Ended
	Jun. 30, 2021shares
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2021
Document Transition Report	false
Entity File Number	1-9924
Entity Registrant Name	Citigroup Inc
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	52-1568099
Entity Address, Address Line One	388 Greenwich Street,
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10013
City Area Code	212
Local Phone Number	559-1000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	2,026,785,183
Entity Central Index Key	0000831001
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Common Stock, par value $.01 per share
Entity Information [Line Items]
Trading Symbol	C
Title of 12(b) Security	Common Stock, par value $.01 per share
Security Exchange Name	NYSE
Depositary Shares, each representing 1/1,000th interest in a share of 7.125% Fixed/Floating Rate Noncumulative Preferred Stock, Series J
Entity Information [Line Items]
Trading Symbol	C Pr J
Title of 12(b) Security	Dep Shs, represent 1/1,000th interest in a share of 7.125% Fix/Float Rate Noncum Pref Stk, Ser J
Security Exchange Name	NYSE
Depositary Shares, each representing 1/1,000th interest in a share of 6.875% Fixed/Floating Rate Noncumulative Preferred Stock, Series K
Entity Information [Line Items]
Trading Symbol	C Pr K
Title of 12(b) Security	Dep Shs, represent 1/1,000th interest in a share of 6.875% Fix/Float Rate Noncum Pref Stk, Ser K
Security Exchange Name	NYSE
7.625% Trust Preferred Securities of Citigroup Capital III (and registrant’s guaranty with respect thereto)
Entity Information [Line Items]
Trading Symbol	C/36Y
Title of 12(b) Security	7.625% TRUPs of Cap III (and registrant’s guaranty)
Security Exchange Name	NYSE
7.875% Fixed Rate / Floating Rate Trust Preferred Securities (TruPS®) of Citigroup Capital XIII (and registrant’s guaranty with respect thereto)
Entity Information [Line Items]
Trading Symbol	C N
Title of 12(b) Security	7.875% FXD / FRN TruPS of Cap XIII (and registrant’s guaranty)
Security Exchange Name	NYSE
6.829% Fixed Rate / Floating Rate Enhanced Trust Preferred Securities (Enhanced TruPS®) of Citigroup Capital XVIII (and registrant’s guaranty with respect thereto)
Entity Information [Line Items]
Trading Symbol	C/67BP
Title of 12(b) Security	6.829% FXD / FRN Enhanced TruPS of Cap XVIII (and registrant’s guaranty)
Security Exchange Name	NYSE
Medium-Term Senior Notes, Series N, Callable Step-Up Coupon Notes due March 31, 2036 of CGMHI (and registrant’s guaranty with respect thereto)
Entity Information [Line Items]
Trading Symbol	C/36A
Title of 12(b) Security	MTN, Series N, Callable Step-Up Coupon Notes due Mar 2036 of CGMHI (and registrant’s guaranty)
Security Exchange Name	NYSE
Medium-Term Senior Notes, Series N, Callable Step-Up Coupon Notes due February 26, 2036 of CGMHI (and registrant’s guaranty with respect thereto)
Entity Information [Line Items]
Trading Symbol	C/36
Title of 12(b) Security	MTN, Series N, Callable Step-Up Coupon Notes due Feb 2036 of CGMHI (and registrant’s guaranty)
Security Exchange Name	NYSE
Medium-Term Senior Notes, Series N, Callable Fixed Rate Notes Due December 18, 2035 of CGMHI (and registrant’s guaranty with respect thereto)
Entity Information [Line Items]
Trading Symbol	C/35
Title of 12(b) Security	MTN, Series N, Callable Fixed Rate Notes Due Dec 2035 of CGMHI (and registrant’s guaranty)
Security Exchange Name	NYSE
Medium-Term Senior Notes, Series N, Callable Fixed Rate Notes Due April 26, 2028 of CGMHI (and registrant’s guaranty with respect thereto)
Entity Information [Line Items]
Trading Symbol	C/28
Title of 12(b) Security	MTN, Series N, Callable Fixed Rate Notes Due Apr 2028 of CGMHI (and registrant’s guaranty)
Security Exchange Name	NYSE

CONSOLIDATED STATEMENT OF INCOM

CONSOLIDATED STATEMENT OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues
Interest revenue		$ 12,463	$ 14,589	$ 24,997	$ 31,728
Interest expense		2,264	3,509	4,632	9,156
Net interest revenue		10,199	11,080	20,365	22,572
Commissions and fees		3,374	2,933	7,044	5,954
Principal transactions		2,304	4,157	6,217	9,418
Administration and other fiduciary fees		1,022	819	1,983	1,673
Realized gains on sales of investments, net		137	748	538	1,180
Impairment losses on investments:
Impairment losses on investments and other assets		(13)	(69)	(82)	(124)
Provision for credit losses on AFS debt securities	[1]	0	(8)	0	(8)
Net impairment losses recognized in earnings		(13)	(77)	(82)	(132)
Other revenue (loss)		451	106	736	(168)
Total non-interest revenues		7,275	8,686	16,436	17,925
Total revenues, net of interest expense		17,474	19,766	36,801	40,497
Provisions for credit losses and for benefits and claims
Provision for credit losses on loans		(1,126)	7,990	(2,605)	14,367
Provision for credit losses on held-to-maturity (HTM) debt securities		4	31	(7)	37
Provision for credit losses on other assets		(3)	48	6	44
Policyholder benefits and claims		15	15	67	39
Provision for credit losses on unfunded lending commitments		44	113	(582)	670
Total provisions for credit losses and for benefits and claims	[2]	(1,066)	8,197	(3,121)	15,157
Operating expenses
Compensation and benefits		5,982	5,624	11,983	11,278
Premises and equipment		558	562	1,134	1,127
Technology/communication		1,895	1,741	3,747	3,464
Advertising and marketing		340	299	610	627
Other operating		2,417	2,234	4,791	4,607
Total operating expenses		11,192	10,460	22,265	21,103
Income (loss) from continuing operations before income taxes		7,348	1,109	17,657	4,237
Provision for income taxes		1,155	52	3,487	632
Income (loss) from continuing operations		6,193	1,057	14,170	3,605
Discontinued operations
Income (loss) from discontinued operations		10	(1)	8	(19)
Benefit for income taxes		0	0	0	0
Income (loss) from discontinued operations, net of taxes		10	(1)	8	(19)
Net income (loss) before attribution of noncontrolling interests		6,203	1,056	14,178	3,586
Noncontrolling interests		10	0	43	(6)
Citigroup’s net income		$ 6,193	$ 1,056	$ 14,135	$ 3,592
Basic earnings per share
Income from continuing operations (in dollars per share)	[3]	$ 2.86	$ 0.38	$ 6.51	$ 1.45
Income from discontinued operations, net of taxes (in dollars per share)	[3]	0	0	0	(0.01)
Net income (in dollars per share)	[3]	$ 2.87	$ 0.38	$ 6.52	$ 1.44
Weighted average common shares outstanding (in shares)		2,056.5	2,081.7	2,069.3	2,089.8
Diluted earnings per share
Income from continuing operations (in dollars per share)	[3]	$ 2.84	$ 0.38	$ 6.47	$ 1.45
Income (loss) from discontinued operations, net of taxes (in dollars per share)	[3]	0	0	0	(0.01)
Net income (in dollars per share)	[3]	$ 2.85	$ 0.38	$ 6.47	$ 1.44
Adjusted weighted average common shares outstanding (in shares)		2,073	2,084.3	2,084.8	2,103
[1]	In accordance with ASC 326.
[2]	This total excludes the provision for credit losses on AFS securities, which is disclosed separately above.
[3]	Due to rounding, earnings per share on continuing operations and discontinued operations may not sum to earnings per share on net income.

CONSOLIDATED STATEMENT OF COMPR

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Citigroup’s net income		$ 6,193	$ 1,056	$ 14,135	$ 3,592
Add: Citigroup’s other comprehensive income
Net change in unrealized gains and losses on debt securities, net of taxes	[1]	(474)	837	(2,259)	3,965
Net change in debt valuation adjustment (DVA), net of taxes	[1],[2]	(62)	(2,232)	(104)	908
Net change in cash flow hedges, net of taxes	[1]	(173)	74	(729)	1,971
Benefit plans liability adjustment, net of taxes	[1]	87	(77)	801	(363)
Net change in foreign currency translation adjustment, net of taxes and hedges	[1]	523	561	(751)	(3,548)
Net change in excluded component of fair value hedges, net of taxes	[1]	(10)	13	(20)	40
Citigroup’s total other comprehensive income (loss)	[1]	(109)	(824)	(3,062)	2,973
Total Citigroup comprehensive income (loss)		6,084	232	11,073	6,565
Add: Other comprehensive income (loss) attributable to noncontrolling interests		18	39	(40)	(12)
Add: Net income (loss) attributable to noncontrolling interests		10	0	43	(6)
Total comprehensive income		$ 6,112	$ 271	$ 11,076	$ 6,547
[1]	See Note 17 to the Consolidated Financial Statements.
[2]	See Note 20 to the Consolidated Financial Statements.

CONSOLIDATED BALANCE SHEET

CONSOLIDATED BALANCE SHEET - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Assets
Cash and due from banks (including segregated cash and other deposits)	$ 27,117	$ 26,349
Deposits with banks, net of allowance	272,121	283,266
Securities borrowed and purchased under agreements to resell (including $187,876 and $185,204 as of June 30, 2021 and December 31, 2020, respectively, at fair value), net of allowance	309,047	294,712
Brokerage receivables, net of allowance	61,138	44,806
Trading account assets (including $167,605 and $168,967 pledged to creditors at June 30, 2021 and December 31, 2020, respectively)	370,950	375,079
Investments:
Available-for-sale debt securities (including $7,718 and $5,921 pledged to creditors as of June 30, 2021 and December 31, 2020, respectively), net of allowance	302,977	335,084
Held-to-maturity debt securities (including $1,225 and $547 pledged to creditors as of June 30, 2021 and December 31, 2020, respectively), net of allowance	176,742	104,943
Equity securities (including $793 and $1,066 at fair value as of June 30, 2021 and December 31, 2020, respectively)	7,344	7,332
Total investments	487,063	447,359
Loans:
Loans, net of unearned income	676,834	675,883
Allowance for credit losses on loans (ACLL)	(19,238)	(24,956)
Total loans, net	657,596	650,927
Goodwill	22,060	22,162
Intangible assets (including MSRs of $419 and $336 as of June 30, 2021 and December 31, 2020, respectively, at fair value)	4,687	4,747
Other assets (including $11,083 and $14,613 as of June 30, 2021 and December 31, 2020, respectively, at fair value), net of allowance	116,089	110,683
Total assets	2,327,868	2,260,090
Liabilities
Non-interest-bearing deposits in U.S. offices	149,373	126,942
Interest-bearing deposits in U.S. offices (including $910 and $879 as of June 30, 2021 and December 31, 2020, respectively, at fair value)	485,589	503,213
Non-interest-bearing deposits in offices outside the U.S.	101,723	100,543
Interest-bearing deposits in offices outside the U.S. (including $1,839 and $1,079 as of June 30, 2021 and December 31, 2020, respectively, at fair value)	573,596	549,973
Total deposits	1,310,281	1,280,671
Securities loaned and sold under agreements to repurchase (including $76,705 and $60,206 as of June 30, 2021 and December 31, 2020, respectively, at fair value)	221,817	199,525
Brokerage payables	59,416	50,484
Trading account liabilities	174,706	168,027
Short-term borrowings (including $7,358 and $4,683 as of June 30, 2021 and December 31, 2020, respectively, at fair value)	31,462	29,514
Long-term debt (including $76,375 and $67,063 as of June 30, 2021 and December 31, 2020, respectively, at fair value)	264,575	271,686
Other liabilities (including $3,279 and $6,835 as of June 30, 2021 and December 31, 2020, respectively, at fair value), net of allowance	62,701	59,983
Total liabilities	2,124,958	2,059,890
Stockholders’ equity
Preferred stock ($1.00 par value; authorized shares: 30 million), issued shares: as of June 30, 2021—719,800 and as of December 31, 2020—779,200, at aggregate liquidation value	17,995	19,480
Common stock ($0.01 par value; authorized shares: 6 billion), issued shares: as of June 30, 2021—3,099,678,668 and as of December 31, 2020—3,099,763,661	31	31
Additional paid-in capital	107,820	107,846
Retained earnings	179,686	168,272
Treasury stock, at cost	(68,253)	(64,129)
Accumulated other comprehensive income (loss) (AOCI)	(35,120)	(32,058)
Total Citigroup stockholders’ equity	202,159	199,442
Noncontrolling interests	751	758
Total equity	202,910	200,200
Total liabilities and equity	2,327,868	2,260,090
Consolidated VIEs
Assets
Cash and due from banks (including segregated cash and other deposits)	157	281
Trading account assets (including $167,605 and $168,967 pledged to creditors at June 30, 2021 and December 31, 2020, respectively)	8,203	8,104
Investments:
Total investments	880	837
Loans:
Loans, net of unearned income	50,441	54,588
Allowance for credit losses on loans (ACLL)	(3,238)	(3,794)
Total loans, net	47,203	50,794
Other assets (including $11,083 and $14,613 as of June 30, 2021 and December 31, 2020, respectively, at fair value), net of allowance	43	43
Total assets	56,486	60,059
Liabilities
Short-term borrowings (including $7,358 and $4,683 as of June 30, 2021 and December 31, 2020, respectively, at fair value)	8,444	9,278
Long-term debt (including $76,375 and $67,063 as of June 30, 2021 and December 31, 2020, respectively, at fair value)	14,522	20,405
Other liabilities (including $3,279 and $6,835 as of June 30, 2021 and December 31, 2020, respectively, at fair value), net of allowance	240	463
Total liabilities	23,206	30,146
Consumer
Loans:
Loans, net of unearned income	275,895	288,839
Allowance for credit losses on loans (ACLL)	(16,111)	(19,554)
Consumer | Consolidated VIEs
Loans:
Loans, net of unearned income	35,574	37,561
Corporate
Loans:
Loans, net of unearned income	400,939	387,044
Allowance for credit losses on loans (ACLL)	(3,127)	(5,402)
Corporate | Consolidated VIEs
Loans:
Loans, net of unearned income	$ 14,867	$ 17,027

CONSOLIDATED BALANCE SHEET (Par

CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Securities borrowed or purchased under agreements to resell, at fair value	$ 309,047	$ 294,712
Trading account assets, pledged to creditors	167,605	168,967
Available-for-sale securities, pledged to creditors	7,718	5,921
Held-to-maturity securities, pledged to creditors	1,225	547
Equity securities, at fair value	793	1,066
Loans, net of unearned income, at fair value	676,834	675,883
Mortgage servicing rights, at fair value	419	336
Other assets, at fair value	116,089	110,683
Interest-bearing deposits in U.S. offices, at fair value	485,589	503,213
Interest-bearing deposits in offices outside the U.S., at fair value	573,596	549,973
Securities loaned or sold under agreements to repurchase, at fair value	221,817	199,525
Short-term borrowings, at fair value	31,462	29,514
Long-term debt, at fair value	264,575	271,686
Other liabilities, at fair value	$ 62,701	$ 59,983
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, authorized shares (in shares)	30,000,000	30,000,000
Preferred stock, issued shares, at aggregate liquidation value (in shares)	719,800	779,200
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares (in shares)	6,000,000,000	6,000,000,000
Common stock, issued shares (in shares)	3,099,678,668	3,099,763,661
Treasury stock (in shares)	1,072,893,485	1,017,674,452
Consumer
Loans, net of unearned income, at fair value	$ 275,895	$ 288,839
Corporate
Loans, net of unearned income, at fair value	400,939	387,044
Fair value
Securities borrowed or purchased under agreements to resell, at fair value	187,876	185,204
Other assets, at fair value	11,083	14,613
Interest-bearing deposits in U.S. offices, at fair value	910	879
Interest-bearing deposits in offices outside the U.S., at fair value	1,839	1,079
Securities loaned or sold under agreements to repurchase, at fair value	76,705	60,206
Short-term borrowings, at fair value	7,358	4,683
Long-term debt, at fair value	76,375	67,063
Other liabilities, at fair value	3,279	6,835
Fair value | Consumer
Loans, net of unearned income, at fair value	14	14
Fair value | Corporate
Loans, net of unearned income, at fair value	$ 7,693	$ 6,840

CONSOLIDATED STATEMENT OF CHANG

CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Millions		Total	Citigroup stockholders' equity	Preferred stock at aggregate liquidation value	Citigroup common stockholders' equity	Common stock and additional paid-in capital (APIC)	Retained earnings	Retained earningsVariable post-charge-off third-party collection costs	[1]	Retained earningsCumulative Effect, Period of Adoption, Adjustment	[1]	Retained earningsCumulative Effect, Period of Adoption, Adjusted Balance	Treasury stock, at cost		Citigroup's accumulated other comprehensive income (loss)	Noncontrolling interests
Balance, beginning of period at Dec. 31, 2019				$ 17,980		$ 107,871	$ 165,369	$ 330		$ (3,076)		$ 162,623	$ (61,660)		$ (36,318)	$ 704
Increase (Decrease) in Stockholders' Equity
Issuance of new preferred stock				1,500
Redemption of preferred stock				(1,500)
Employee benefit plans						(174)							442	[2]
Preferred stock issuance costs (new issuances, net of reclassifications to retained earnings for redemptions)						2
Other (primarily reclassifications from APIC for preferred issuance costs on redemptions)							(4)
Common dividends	[3]						(2,152)
Preferred dividends		$ (544)					(544)
Treasury stock acquired	[4]												(2,925)
Transactions between Citigroup and the noncontrolling-interest shareholders																(6)
Citigroup’s total other comprehensive income															2,973	(12)
Net income before attribution of noncontrolling interests		3,586					3,592									(6)
Net change in noncontrolling interests																(24)
Balance, end of period at Jun. 30, 2020		192,386	$ 191,706	17,980	$ 173,726	107,699	163,515						(64,143)		(33,345)	680
Balance, beginning of period at Mar. 31, 2020				17,980		107,581	163,782					163,782	(64,147)		(32,521)	651
Increase (Decrease) in Stockholders' Equity
Employee benefit plans						118							4	[2]
Other (primarily reclassifications from APIC for preferred issuance costs on redemptions)							1									(10)
Common dividends	[3]						(1,071)
Preferred dividends		(253)					(253)
Citigroup’s total other comprehensive income															(824)	39
Net income before attribution of noncontrolling interests		1,056					1,056
Net change in noncontrolling interests																29
Balance, end of period at Jun. 30, 2020		192,386	191,706	17,980	173,726	107,699	163,515						(64,143)		(33,345)	680
Balance, beginning of period at Dec. 31, 2020		200,200		19,480		107,877	168,272					168,272	(64,129)		(32,058)	758
Balance, end of period at Mar. 31, 2021				20,280		107,725	174,816					174,816	(65,261)		(35,011)	724
Balance, beginning of period at Dec. 31, 2020		200,200		19,480		107,877	168,272					168,272	(64,129)		(32,058)	758
Increase (Decrease) in Stockholders' Equity
Issuance of new preferred stock				2,300
Redemption of preferred stock				(3,785)
Employee benefit plans						(63)							476	[2]
Preferred stock issuance costs (new issuances, net of reclassifications to retained earnings for redemptions)						40
Other (primarily reclassifications from APIC for preferred issuance costs on redemptions)						(3)	(40)									(11)
Common dividends	[3]						(2,136)
Preferred dividends		(545)					(545)
Treasury stock acquired	[4]												(4,600)
Transactions between Citigroup and the noncontrolling-interest shareholders																1
Citigroup’s total other comprehensive income															(3,062)	(40)
Net income before attribution of noncontrolling interests		14,178					14,135									43
Net change in noncontrolling interests																(7)
Balance, end of period at Jun. 30, 2021		202,910	202,159	17,995	184,164	107,851	179,686						(68,253)		(35,120)	751
Balance, beginning of period at Mar. 31, 2021				20,280		107,725	174,816					$ 174,816	(65,261)		(35,011)	724
Increase (Decrease) in Stockholders' Equity
Redemption of preferred stock				(2,285)
Employee benefit plans						112							8	[2]
Preferred stock issuance costs (new issuances, net of reclassifications to retained earnings for redemptions)						8
Other (primarily reclassifications from APIC for preferred issuance costs on redemptions)						6	(8)									(2)
Common dividends	[3]						(1,062)
Preferred dividends		(253)					(253)
Treasury stock acquired	[4]												(3,000)
Transactions between Citigroup and the noncontrolling-interest shareholders																1
Citigroup’s total other comprehensive income															(109)	18
Net income before attribution of noncontrolling interests		6,203					6,193									10
Net change in noncontrolling interests																27
Balance, end of period at Jun. 30, 2021		$ 202,910	$ 202,159	$ 17,995	$ 184,164	$ 107,851	$ 179,686						$ (68,253)		$ (35,120)	$ 751
[1]	See Note 1 to the Consolidated Financial Statements for additional details.
[2]	Includes treasury stock related to (i) certain activity on employee stock option program exercises where the employee delivers existing shares to cover the option exercise, or (ii) under Citi’s employee restricted or deferred stock programs where shares are withheld to satisfy tax requirements.
[3]	Common dividends declared were $0.51 per share in both of the first and second quarters of 2021 and 2020.
[4]	Primarily consists of open market purchases under Citi’s Board of Directors-approved common share repurchase program.

CONSOLIDATED STATEMENT OF CHA_2

CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - $ / shares	3 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020
Statement of Stockholders' Equity [Abstract]
Common dividends declared (in dollars per share)	$ 0.51	$ 0.51	$ 0.51	$ 0.51

CONSOLIDATED STATEMENT OF CASH

CONSOLIDATED STATEMENT OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities of continuing operations
Net income before attribution of noncontrolling interests		$ 14,178	$ 3,586
Net income (loss) attributable to noncontrolling interests		43	(6)
Citigroup’s net income		14,135	3,592
Income (loss) from discontinued operations, net of taxes		8	(19)
Income from continuing operations—excluding noncontrolling interests		14,127	3,611
Adjustments to reconcile net income to net cash provided by (used in) operating activities of continuing operations
Depreciation and amortization		1,944	1,853
Provisions for credit losses on loans and unfunded lending commitments		(3,187)	15,037
Realized gains from sales of investments		(538)	(1,180)
Impairment losses on investments and other assets		82	124
Change in trading account assets		4,098	(86,203)
Change in trading account liabilities		6,679	29,370
Change in brokerage receivables net of brokerage payables		(7,400)	190
Change in loans HFS		(3,214)	(1,200)
Change in other assets		(2,260)	1,472
Change in other liabilities		3,300	2,620
Other, net		9,932	15,098
Total adjustments		9,436	(22,819)
Net cash provided by (used in) operating activities of continuing operations		23,563	(19,208)
Cash flows from investing activities of continuing operations
Change in securities borrowed and purchased under agreements to resell		(14,335)	(31,595)
Change in loans		(3,088)	7,943
Proceeds from sales and securitizations of loans		869	826
Purchases of investments		(201,567)	(207,701)
Proceeds from sales of investments		66,477	86,191
Proceeds from maturities of investments		75,195	53,909
Capital expenditures on premises and equipment and capitalized software		(1,771)	(1,318)
Proceeds from sales of premises and equipment, subsidiaries and affiliates and repossessed assets		28	12
Other, net		81	44
Net cash used in investing activities of continuing operations		(78,111)	(91,689)
Cash flows from financing activities of continuing operations
Dividends paid		(2,663)	(2,679)
Issuance of preferred stock		2,300	1,500
Redemption of preferred stock		(3,785)	(1,500)
Treasury stock acquired		(4,381)	(2,925)
Stock tendered for payment of withholding taxes		(324)	(407)
Change in securities loaned and sold under agreements to repurchase		22,292	49,383
Issuance of long-term debt		41,511	58,471
Payments and redemptions of long-term debt		(41,894)	(32,297)
Change in deposits		29,610	163,070
Change in short-term borrowings		1,948	(4,893)
Net cash provided by financing activities of continuing operations		44,614	227,723
Effect of exchange rate changes on cash and due from banks		(443)	(972)
Change in cash, due from banks and deposits with banks		(10,377)	115,854
Cash, due from banks and deposits with banks at beginning of period		309,615	193,919
Cash, due from banks and deposits with banks at end of period		299,238	309,773
Cash and due from banks (including segregated cash and other deposits)		27,117	22,889
Deposits with banks, net of allowance		272,121	286,884
Cash, due from banks and deposits with banks at end of period		299,238	309,773
Supplemental disclosure of cash flow information for continuing operations
Cash paid during the period for income taxes		2,176	2,543
Cash paid during the period for interest		4,545	8,751
Non-cash investing activities
Transfers to loans HFS (Other assets) from loans	[1]	$ 961	$ 1,036
[1]	Operating and finance lease right-of-use assets and lease liabilities represent non-cash investing and financing activities, respectively, and are not included in the non-cash investing activities presented here. See Note 22 to the Consolidated Financial Statements for more information and balances as of June 30, 2021.

BASIS OF PRESENTATION, UPDATED

BASIS OF PRESENTATION, UPDATED ACCOUNTING POLICIES AND ACCOUNTING CHANGES	6 Months Ended
	Jun. 30, 2021
Accounting Policies [Abstract]
BASIS OF PRESENTATION, UPDATED ACCOUNTING POLICIES AND ACCOUNTING CHANGES	BASIS OF PRESENTATION, UPDATED ACCOUNTING POLICIES AND ACCOUNTING CHANGES Basis of Presentation The accompanying unaudited Consolidated Financial Statements as of June 30, 2021 and for the three- and six-month periods ended June 30, 2021 and 2020 include the accounts of Citigroup Inc. and its consolidated subsidiaries. In the opinion of management, all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation have been reflected. The accompanying unaudited Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and related notes included in Citigroup’s Annual Report on Form 10-K for the fiscal year ended December 31, 2020 (2020 Annual Report on Form 10-K) and Citigroup’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2021 (First Quarter of 2021 Form 10-Q). Certain financial information that is normally included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles (GAAP), but is not required for interim reporting purposes, has been condensed or omitted. Management must make estimates and assumptions that affect the Consolidated Financial Statements and the related footnote disclosures. While management uses its best judgment, actual results could differ from those estimates. As noted above, the Notes to these Consolidated Financial Statements are unaudited. Throughout these Notes, “Citigroup,” “Citi” and “the Company” refer to Citigroup Inc. and its consolidated subsidiaries. Certain reclassifications and updates have been made to the prior periods’ financial statements and notes to conform to the current period’s presentation. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES See Note 1 to the Consolidated Financial Statements in Citigroup’s 2020 Annual Report on Form 10-K for a summary of all of Citigroup’s significant accounting policies. ACCOUNTING CHANGES Accounting for Financial Instruments — Credit Losses Overview In June 2016, the Financial Accounting Standards Board (FASB) issued ASU No. 2016-13, Financial Instruments — Credit Losses (Topic 326). The ASU introduced a new credit loss methodology, the current expected credit losses (CECL) methodology, which requires earlier recognition of credit losses while also providing additional disclosure about credit risk. Citi adopted the ASU as of January 1, 2020, which, as discussed below, resulted in an increase in Citi’s Allowance for credit losses and a decrease to opening Retained earnings , net of deferred income taxes, at January 1, 2020. The CECL methodology utilizes a lifetime “expected credit loss” measurement objective for the recognition of credit losses for loans, held-to-maturity debt securities, receivables and other financial assets measured at amortized cost at the time the financial asset is originated or acquired. The ACL is adjusted each period for changes in expected lifetime credit losses. The CECL methodology represents a significant change from prior U.S. GAAP and replaced the prior multiple existing impairment methods, which generally required that a loss be incurred before it was recognized. Within the life cycle of a loan or other financial asset, the methodology generally results in the earlier recognition of the provision for credit losses and the related ACL than prior U.S. GAAP. For available-for-sale debt securities where fair value is less than cost that Citi intends to hold or more-likely-than-not will not be required to sell, credit-related impairment, if any, is recognized through an ACL and adjusted each period for changes in credit risk. January 1, 2020 CECL Transition (Day 1) Impact The CECL methodology’s impact on expected credit losses, among other things, reflects Citi’s view of the current state of the economy, forecasted macroeconomic conditions and quality of Citi’s portfolios. At the January 1, 2020 date of adoption, based on forecasts of macroeconomic conditions and exposures at that time, the aggregate impact to Citi was an approximate $4.1 billion, or an approximate 29%, pretax increase in the Allowance for credit losses , along with a $3.1 billion after-tax decrease in Retained earnings and a deferred tax asset increase of $1.0 billion. This transition impact reflects (i) a $4.9 billion build to the Allowance for credit losses for Citi’s consumer exposures, primarily driven by the impact on credit card receivables of longer estimated tenors under the CECL lifetime expected credit loss methodology (loss coverage of approximately 23 months) compared to shorter estimated tenors under the probable loss methodology under prior U.S. GAAP (loss coverage of approximately 14 months), net of recoveries; and (ii) a release of $0.8 billion of reserves primarily related to Citi’s corporate net loan loss exposures, largely due to more precise contractual maturities that result in shorter remaining tenors, incorporation of recoveries and use of more specific historical loss data based on an increase in portfolio segmentation across industries and geographies. Under the CECL methodology, the Allowance for credit losses consists of quantitative and qualitative components. Citi’s quantitative component of the Allowance for credit losses is model based and utilizes a single forward-looking macroeconomic forecast and discounts inputs for the corporate classifiably managed portfolios, complemented by the qualitative component described below, in estimating expected credit losses and discounts inputs for the corporate classifiably managed portfolios. Reasonable and supportable forecast periods vary by product. For example, Citi’s consumer models use a 13-quarter reasonable and supportable period and revert to historical loss experience thereafter, while its corporate loan models use a nine-quarter reasonable and supportable period followed by a three-quarter graduated transition to historical loss experience. The qualitative management adjustment component includes, among other things, management adjustments to reflect economic uncertainty based on the likelihood and severity of downside scenarios and certain portfolio characteristics not captured in the quantitative component, such as concentrations, collateral coverage, model limitations, idiosyncratic events and other factors as required by banking supervisory guidance for the ACL. The qualitative management adjustment component also includes management adjustments to reflect the uncertainty around the estimated impact of the pandemic on credit loss estimates. Accounting for Variable Post-Charge-Off Third-Party Collection Costs In the fourth quarter of 2020, Citi revised the 2020 second quarter accounting conclusion for its variable post-charge-off third-party collection costs from a “change in accounting estimate effected by a change in accounting principle” to a “change in accounting principle,” which required an adjustment to January 1, 2020 opening retained earnings, rather than 2020 net income. As a result, Citi’s full-year and quarterly results for 2020 were revised to reflect this change as if it were effective as of January 1, 2020, as follows: • An increase to beginning retained earnings on January 1, 2020 of $330 million and a decrease of $443 million in the allowance for credit losses on loans, as well as a $113 million decrease in other assets related to income taxes. • A decrease of $18 million to provisions for credit losses on loans in the first quarter and increases of $339 million and $122 million to provisions for credit losses on loans in the second and third quarters, respectively. • Increases in operating expenses of $49 million and $45 million with a corresponding decrease in net credit losses, in the first and second quarters, respectively. In making these revisions, Citi considered the guidance in ASC Topic 250, Accounting Changes and Error Corrections ; ASC Topic 270, Interim Reporting ; ASC Topic 250-S99-1, Assessing Materiality ; and ASC Topic 250-S99-23, Accounting Changes Not Retroactively Applied Due to Immateriality, Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements . Citi believes that the effects of the revisions were not material to any previously reported quarterly or annual period. Reference Rate Reform In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting , which provides optional guidance to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. Specifically, the guidance permits an entity, when certain criteria are met, to consider amendments to contracts made to comply with reference rate reform to meet the definition of a modification under U.S. GAAP. It further allows hedge accounting to be maintained and permits a one-time transfer or sale of qualifying held-to-maturity securities. The expedients and exceptions provided by the amendments are permitted to be adopted any time through December 31, 2022 and do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022, except for certain optional expedients elected for certain hedging relationships existing as of December 31, 2022. The ASU was adopted by Citi as of June 30, 2020 with prospective application and did not impact financial results in 2020. In January 2021, the FASB issued ASU No. 2021-01, Reference Rate Reform (Topic 848): Scope , which clarifies that the scope of the initial accounting relief issued by the FASB in March 2020 includes derivative instruments that do not reference a rate that is expected to be discontinued but that use an interest rate for margining, discounting or contract price alignment that is modified as a result of reference rate reform (commonly referred to as the “discounting transition”). The amendments do not apply to contract modifications made after December 31, 2022, new hedging relationships entered into after December 31, 2022 and existing hedging relationships evaluated for effectiveness in periods after December 31, 2022, except for hedging relationships existing as of December 31, 2022, that apply certain optional expedients in which the accounting effects are recorded through the end of the hedging relationship. The ASU was adopted by Citi on a full retrospective basis upon issuance and did not impact financial results in 2020. FUTURE ACCOUNTING CHANGES Long-Duration Insurance Contracts In August 2018, the FASB issued ASU No. 2018-12, Financial Services—Insurance: Targeted Improvements to the Accounting for Long-Duration Contracts , which changes the existing recognition, measurement, presentation and disclosures for long-duration contracts issued by an insurance entity. Specifically, the guidance (i) improves the timeliness of recognizing changes in the liability for future policy benefits and prescribes the rate used to discount future cash flows for long-duration insurance contracts, (ii) simplifies and improves the accounting for certain market-based options or guarantees associated with deposit (or account balance) contracts, (iii) simplifies the amortization of deferred acquisition costs and (iv) introduces additional quantitative and qualitative disclosures. Citi has certain insurance subsidiaries, primarily in Mexico, that issue long-duration insurance contracts such as traditional life insurance policies and life-contingent annuity contracts that will be impacted by the requirements of ASU 2018-12. The effective date of ASU 2018-12 was deferred for all insurance entities by ASU 2019-09, Financial Services—Insurance: Effective Date (issued in October 2019) and by ASU 2020-11, Financial Services—Insurance: Effective Date and Early Application

DISCONTINUED OPERATIONS AND SIG

DISCONTINUED OPERATIONS AND SIGNIFICANT DISPOSALS	6 Months Ended
	Jun. 30, 2021
Discontinued Operations and Disposal Groups [Abstract]
DISCONTINUED OPERATIONS AND SIGNIFICANT DISPOSALS	DISCONTINUED OPERATIONS AND SIGNIFICANT DISPOSALS Discontinued Operations The Company’s results from Discontinued operations consisted of residual activities related to previously divested operations. All Discontinued operations results are recorded within Corporate/Other . The following table summarizes financial information for all Discontinued operations : Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Total revenues, net of interest expense $ — $ — $ — $ — Income (loss) from discontinued operations (1) $ 10 $ (1) $ 8 $ (19) Benefit for income taxes — — — — Income (loss) from discontinued operations, $ 10 $ (1) $ 8 $ (19) (1) Amounts in each period relate to the sale of the Egg Banking business in 2011. Cash flows from Discontinued operations were not material for the periods presented. Significant Disposals Citi did not have any significant disposals to report as of June 30, 2021. As of August 4, 2021, Citi had not entered into any definitive sales agreements related to its recently announced intention to pursue exits of its consumer franchises in 13 markets across Asia and EMEA . For a description of the Company’s significant disposal transactions in prior periods and financial impact, see Note 2 to the Consolidated Financial Statements in Citi’s 2020 Annual Report on Form 10-K.

BUSINESS SEGMENTS

BUSINESS SEGMENTS	6 Months Ended
	Jun. 30, 2021
Segment Reporting [Abstract]
BUSINESS SEGMENTS	BUSINESS SEGMENTS Citigroup’s activities are conducted through two business segments: Global Consumer Banking ( GCB) and Institutional Clients Group (ICG) , with the remaining operations in Corporate/Other , which includes activities not assigned to a specific business segment as well as certain North America legacy loan portfolios, discontinued operations and other legacy assets. Beginning in the first quarter of 2021, Citi changed its allocation for certain recurring expenses that are attributable to the business segments from Corporate/Other to GCB and ICG . These expenses include incremental investments related to risks and controls, technology capabilities and information security initiatives, as well as some incremental spend related to the pandemic. The prior-period reportable operating segment results have been revised to conform the presentation for all periods to reflect this revised allocation methodology. Citi’s consolidated results were unchanged for all periods presented as a result of the changes discussed above. For additional information regarding Citigroup’s business segments, see Note 3 to the Consolidated Financial Statements in Citi’s 2020 Annual Report on Form 10-K. The following tables present certain information regarding the Company’s continuing operations by segment: Three Months Ended June 30, Revenues, (1) Provision (benefits) Income (loss) from (2) Identifiable assets In millions of dollars, except identifiable assets in billions 2021 2020 2021 2020 2021 2020 June 30, December 31, 2020 Global Consumer Banking $ 6,820 $ 7,339 $ 573 $ (257) $ 1,832 $ (705) $ 432 $ 434 Institutional Clients Group 10,387 12,137 1,104 455 3,829 1,822 1,795 1,730 Corporate/Other 267 290 (522) (146) 532 (60) 101 96 Total $ 17,474 $ 19,766 $ 1,155 $ 52 $ 6,193 $ 1,057 $ 2,328 $ 2,260 Six Months Ended June 30, Revenues, (3) Provision (benefits) Income (loss) from (4) In millions of dollars 2021 2020 2021 2020 2021 2020 Global Consumer Banking $ 13,857 $ 15,513 $ 1,230 $ (538) $ 4,003 $ (1,489) Institutional Clients Group 22,607 24,621 2,830 1,484 9,767 5,396 Corporate/Other 337 363 (573) (314) 400 (302) Total $ 36,801 $ 40,497 $ 3,487 $ 632 $ 14,170 $ 3,605 (1) Includes total revenues, net of interest expense (excluding Corporate/Other ), in North America of $7.9 billion and $9.7 billion; in EMEA of $3.3 billion and $3.4 billion; in Latin America of $2.2 billion and $2.3 billion; and in Asia of $3.8 billion and $4.1 billion for the three months ended June 30, 2021 and 2020, respectively. These regional numbers exclude Corporate/Other , which largely operates within the U.S. (2) Includes pretax provisions for credit losses and for benefits and claims in the GCB results of $(0.1) billion and $4.2 billion; in the ICG results of $(0.8) billion and $3.9 billion; and in the Corporate/Other results of $(0.1) billion and $0.2 billion for the three months ended June 30, 2021 and 2020, respectively. (3) Includes total revenues, net of interest expense, in North America of $17.2 billion and $19.9 billion; in EMEA of $7.0 billion and $6.9 billion; in Latin America of $4.4 billion and $4.9 billion; and in Asia of $7.9 billion and $8.5 billion for the six months ended June 30, 2021 and 2020, respectively. Regional numbers exclude Corporate/Other , which largely operates within the U.S. (4) Includes pretax provisions for credit losses and for benefits and claims in the GCB results of $(0.3) billion and $8.9 billion; in the ICG results of $(2.6) billion and $5.9 billion; and in the Corporate/Other results of $(0.2) billion and $0.4 billion for the six months ended June 30, 2021 and 2020, respectively.

INTEREST REVENUE AND EXPENSE

INTEREST REVENUE AND EXPENSE	6 Months Ended
	Jun. 30, 2021
Banking and Thrift, Interest [Abstract]
INTEREST REVENUE AND EXPENSE	INTEREST REVENUE AND EXPENSE Interest revenue and Interest expense consisted of the following: Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Interest revenue Loan interest, including fees $ 8,733 $ 10,149 $ 17,642 $ 21,399 Deposits with banks 126 159 271 686 Securities borrowed and purchased under agreements to resell 205 401 499 1,609 Investments, including dividends 1,818 2,097 3,570 4,378 Trading account assets (1) 1,470 1,673 2,807 3,263 Other interest-bearing assets 111 110 208 393 Total interest revenue $ 12,463 $ 14,589 $ 24,997 $ 31,728 Interest expense Deposits (2) $ 955 $ 1,469 $ 2,007 $ 4,083 Securities loaned and sold under agreements to repurchase 260 453 513 1,538 Trading account liabilities (1) 150 144 264 383 Short-term borrowings and other interest-bearing liabilities 31 140 62 524 Long-term debt 868 1,303 1,786 2,628 Total interest expense $ 2,264 $ 3,509 $ 4,632 $ 9,156 Net interest revenue $ 10,199 $ 11,080 $ 20,365 $ 22,572 Provision (benefit) for credit losses on loans (1,126) 7,990 (2,605) 14,367 Net interest revenue after provision for credit losses on loans $ 11,325 $ 3,090 $ 22,970 $ 8,205 (1) Interest expense on Trading account liabilities of ICG is reported as a reduction of Interest revenue . Interest revenue and Interest expense on cash collateral positions are reported in interest on Trading account assets and Trading account liabilities , respectively. (2) Includes deposit insurance fees and charges of $279 million and $270 million for the three months ended June 30, 2021 and 2020, respectively, and $619 million and $495 million for the six months ended June 30, 2021 and 2020, respectively.

COMMISSIONS AND FEES; ADMINISTR

COMMISSIONS AND FEES; ADMINISTRATION AND OTHER FIDUCIARY FEES	6 Months Ended
	Jun. 30, 2021
Other Income and Expenses [Abstract]
COMMISSIONS AND FEES; ADMINISTRATION AND OTHER FIDUCIARY FEES	COMMISSIONS AND FEES; ADMINISTRATION AND OTHER FIDUCIARY FEES For additional information on Citi’s commissions and fees, and administration and other fiduciary fees, see Note 5 to the Consolidated Financial Statements in Citi’s 2020 Annual Report on Form 10-K. The following tables present Commissions and fees revenue: Three Months Ended June 30, 2021 Six Months Ended June 30, 2021 In millions of dollars ICG GCB Corporate/Other Total ICG GCB Corporate/Other Total Investment banking $ 1,386 $ — $ — $ 1,386 $ 3,010 $ — $ — $ 3,010 Brokerage commissions 528 293 — 821 1,143 620 — 1,763 Credit- and bank-card income Interchange fees 197 2,273 — 2,470 355 4,179 — 4,534 Card-related loan fees 7 170 — 177 12 347 — 359 Card rewards and partner payments (1) (104) (2,411) — (2,515) (179) (4,507) — (4,686) Deposit-related fees (2) 260 65 — 325 504 150 — 654 Transactional service fees 251 26 — 277 492 50 — 542 Corporate finance (3) 180 — — 180 338 — — 338 Insurance distribution revenue 1 112 — 113 6 242 — 248 Insurance premiums — 30 — 30 — 50 — 50 Loan servicing 10 10 4 24 22 17 8 47 Other 27 56 3 86 68 114 3 185 Total commissions and fees (4) $ 2,743 $ 624 $ 7 $ 3,374 $ 5,771 $ 1,262 $ 11 $ 7,044 Three Months Ended June 30, 2020 Six Months Ended June 30, 2020 In millions of dollars ICG GCB Corporate/Other Total ICG GCB Corporate/Other Total Investment banking $ 1,358 $ — $ — $ 1,358 $ 2,398 $ — $ — $ 2,398 Brokerage commissions 482 204 — 686 1,059 453 — 1,512 Credit- and bank-card income Interchange fees 123 1,505 — 1,628 384 3,422 — 3,806 Card-related loan fees 3 132 — 135 14 298 — 312 Card rewards and partner payments (1) (70) (1,745) — (1,815) (219) (3,838) — (4,057) Deposit-related fees (2) 220 85 — 305 453 200 — 653 Transactional service fees 215 20 — 235 442 44 — 486 Corporate finance (3) 149 — — 149 295 — — 295 Insurance distribution revenue 1 113 — 114 5 238 — 243 Insurance premiums — 31 — 31 — 74 — 74 Loan servicing 18 11 2 31 38 22 10 70 Other 27 46 3 76 57 102 3 162 Total commissions and fees (4) $ 2,526 $ 402 $ 5 $ 2,933 $ 4,926 $ 1,015 $ 13 $ 5,954 (1) Citi’s consumer credit card programs have certain partner-sharing agreements that vary by partner. These agreements are subject to contractually based performance thresholds that, if met, would require Citi to make ongoing payments to the partner. The threshold is based on the profitability of a program and is generally calculated based on predefined program revenues less predefined program expenses. In most of Citi’s partner-sharing agreements, program expenses include net credit losses and, to the extent that the increase in net credit losses reduces Citi’s liability for the partners’ share for a given program year, would generally result in lower payments to partners in total for that year and vice versa. Further, in some instances, other partner payments are based on program sales and new account acquisitions. (2) Includes overdraft fees of $24 million and $20 million for the three months ended June 30, 2021 and 2020, respectively, and $47 million and $51 million for the six months ended June 30, 2021 and 2020, respectively. Overdraft fees are accounted for under ASC 310. (3) Consists primarily of fees earned from structuring and underwriting loan syndications or related financing activity. This activity is accounted for under ASC 310. (4) Commissions and fees includes $(2,073) million and $(1,426) million not accounted for under ASC 606, Revenue from Contracts with Customers , for the three months ended June 30, 2021 and 2020, respectively, and $(3,822) million and $(3,228) million for the six months ended June 30, 2021 and 2020, respectively. Amounts reported in Commissions and fees accounted for under other guidance primarily include card-related loan fees, card reward programs and certain partner payments, corporate finance fees, insurance premiums and loan servicing fees. The following tables present Administration and other fiduciary fees revenue: Three Months Ended June 30, 2021 Six Months Ended June 30, 2021 In millions of dollars ICG GCB Corporate/Other Total ICG GCB Corporate/Other Total Custody fees $ 497 $ 6 $ — $ 503 $ 948 $ 12 $ — $ 960 Fiduciary fees 200 169 3 372 392 336 3 731 Guarantee fees 143 2 2 147 285 4 3 292 Total administration and other fiduciary fees (1) $ 840 $ 177 $ 5 $ 1,022 $ 1,625 $ 352 $ 6 $ 1,983 Three Months Ended June 30, 2020 Six Months Ended June 30, 2020 In millions of dollars ICG GCB Corporate/Other Total ICG GCB Corporate/Other Total Custody fees $ 372 $ 6 $ 21 $ 399 $ 738 $ 14 $ 36 $ 788 Fiduciary fees 158 132 — 290 330 288 — 618 Guarantee fees 127 1 2 130 261 3 3 267 Total administration and other fiduciary fees (1) $ 657 $ 139 $ 23 $ 819 $ 1,329 $ 305 $ 39 $ 1,673 (1) Administration and other fiduciary fees includes $147 million and $130 million for the three months ended June 30, 2021 and 2020, respectively, and $292 million and $267 million for the six months ended June 30, 2021 and 2020, respectively, that are not accounted for under ASC 606, Revenue from Contracts with Customers. These generally include guarantee fees.

PRINCIPAL TRANSACTIONS

PRINCIPAL TRANSACTIONS	6 Months Ended
	Jun. 30, 2021
Principal Transactions Revenue, Net [Abstract]
PRINCIPAL TRANSACTIONS	PRINCIPAL TRANSACTIONS Principal transactions revenue consists of realized and unrealized gains and losses from trading activities. Trading activities include revenues from fixed income, equities, credit and commodities products and foreign exchange transactions that are managed on a portfolio basis and characterized below based on the primary risk managed by each trading desk. Not included in the table below is the impact of net interest revenue related to trading activities, which is an integral part of trading activities’ profitability. See Note 4 to the Consolidated Financial Statements for information about net interest revenue related to trading activities. Principal transactions include CVA (credit valuation adjustments) and FVA (funding valuation adjustments) on over-the-counter derivatives, and gains (losses) on certain economic hedges on loans in ICG . These adjustments are discussed further in Note 20 to the Consolidated Financial Statements. In certain transactions, Citi incurs fees and presents these fees paid to third parties in operating expenses. The following table presents Principal transactions revenue: Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Interest rate risks (1) $ 530 $ 1,847 $ 1,964 $ 3,757 Foreign exchange risks (2) 965 1,114 1,927 2,109 Equity risks (3) 358 103 1,203 921 Commodity and other risks (4) 393 365 593 760 Credit products and risks (5) 58 728 530 1,871 Total $ 2,304 $ 4,157 $ 6,217 $ 9,418 (1) Includes revenues from government securities and corporate debt, municipal securities, mortgage securities and other debt instruments. Also includes spot and forward trading of currencies and exchange-traded and over-the-counter (OTC) currency options, options on fixed income securities, interest rate swaps, currency swaps, swap options, caps and floors, financial futures, OTC options and forward contracts on fixed income securities. (2) Includes revenues from foreign exchange spot, forward, option and swap contracts, as well as foreign currency translation (FX translation) gains and losses. (3) Includes revenues from common, preferred and convertible preferred stock, convertible corporate debt, equity-linked notes and exchange-traded and OTC equity options and warrants. (4) Primarily includes revenues from crude oil, refined oil products, natural gas and other commodities trades. (5) Includes revenues from structured credit products.

INCENTIVE PLANS

INCENTIVE PLANS	6 Months Ended
	Jun. 30, 2021
Share-based Payment Arrangement [Abstract]
INCENTIVE PLANS	INCENTIVE PLANSFor additional information on Citi’s incentive plans, see Note 7 to the Consolidated Financial Statements in Citi’s 2020 Annual Report on Form 10-K.

RETIREMENT BENEFITS

RETIREMENT BENEFITS	6 Months Ended
	Jun. 30, 2021
Retirement Benefits [Abstract]
RETIREMENT BENEFITS	RETIREMENT BENEFITS For additional information on Citi’s retirement benefits, see Note 8 to the Consolidated Financial Statements in Citi’s 2020 Annual Report on Form 10-K. Net (Benefit) Expense The following tables summarize the components of net (benefit) expense recognized in the Consolidated Statement of Income for the Company’s pension and postretirement plans for Significant Plans and All Other Plans: Three Months Ended June 30, Pension plans Postretirement benefit plans U.S. plans Non-U.S. plans U.S. plans Non-U.S. plans In millions of dollars 2021 2020 2021 2020 2021 2020 2021 2020 Benefits earned during the period $ — $ — $ 38 $ 34 $ — $ — $ 2 $ 2 Interest cost on benefit obligation 95 101 70 61 3 5 24 22 Expected return on assets (174) (206) (63) (56) (3) (4) (21) (18) Amortization of unrecognized: Prior service benefit — — (2) (2) (2) — (3) (2) Net actuarial loss (gain) 54 53 14 17 (1) — 3 5 Settlement loss (1) — — 4 3 — — — — Total net (benefit) expense $ (25) $ (52) $ 61 $ 57 $ (3) $ 1 $ 5 $ 9 (1) Losses due to settlement relate to repositioning and divestiture activities. Six Months Ended June 30, Pension plans Postretirement benefit plans U.S. plans Non-U.S. plans U.S. plans Non-U.S. plans In millions of dollars 2021 2020 2021 2020 2021 2020 2021 2020 Benefits earned during the period $ — $ — $ 77 $ 71 $ — $ — $ 4 $ 4 Interest cost on benefit obligation 177 207 132 125 6 10 49 46 Expected return on assets (356) (414) (124) (121) (7) (9) (43) (38) Amortization of unrecognized: Prior service cost (benefit) 1 1 (3) (3) (4) — (5) (4) Net actuarial loss 116 109 32 34 (1) — 8 10 Settlement loss (1) — — 4 3 — — — — Total net (benefit) expense $ (62) $ (97) $ 118 $ 109 $ (6) $ 1 $ 13 $ 18 (1) Losses due to settlement relate to repositioning and divestiture activities. Funded Status and Accumulated Other Comprehensive Income (AOCI) The following table summarizes the funded status and amounts recognized on the Consolidated Balance Sheet for the Company’s Significant Plans: Six Months Ended June 30, 2021 Pension plans Postretirement benefit plans In millions of dollars U.S. plans Non-U.S. plans U.S. plans Non-U.S. plans Change in projected benefit obligation Projected benefit obligation at beginning of year $ 13,815 $ 8,629 $ 559 $ 1,390 Plans measured annually (25) (2,248) — (277) Projected benefit obligation at beginning of year—Significant Plans $ 13,790 $ 6,381 $ 559 $ 1,113 First quarter activity (983) (572) (37) (146) Projected benefit obligation at March 31, 2021—Significant Plans $ 12,807 $ 5,809 $ 522 $ 967 Benefits earned during the period — 22 — 1 Interest cost on benefit obligation 95 59 3 23 Actuarial loss (1) 429 25 — 20 Benefits paid, net of participants’ contributions and government subsidy (259) (76) (9) (18) Foreign exchange impact and other — 108 — 27 Projected benefit obligation at period end—Significant Plans $ 13,072 $ 5,947 $ 516 $ 1,020 Change in plan assets Plan assets at fair value at beginning of year $ 13,309 $ 7,831 $ 331 $ 1,146 Plans measured annually — (1,500) — (8) Plan assets at fair value at beginning of year—Significant Plans $ 13,309 $ 6,331 $ 331 $ 1,138 First quarter activity (435) (404) (8) (44) Plan assets at fair value at March 31, 2021—Significant Plans $ 12,874 $ 5,927 $ 323 $ 1,094 Actual return on plan assets 566 157 10 24 Company contributions, net of reimbursements 13 18 4 — Benefits paid, net of participants’ contributions and government subsidy (259) (76) (9) (18) Foreign exchange impact and other — 114 — 29 Plan assets at fair value at period end—Significant Plans $ 13,194 $ 6,140 $ 328 $ 1,129 Funded status of the Significant Plans Qualified plans (2) $ 802 $ 193 $ (188) $ 109 Nonqualified plans (3) (680) — — — Funded status of the plans at period end—Significant Plans $ 122 $ 193 $ (188) $ 109 Net amount recognized at period end Benefit asset $ 802 $ 789 $ — $ 109 Benefit liability (680) (596) (188) — Net amount recognized on the balance sheet—Significant Plans $ 122 $ 193 $ (188) $ 109 Amounts recognized in AOCI at period end Prior service benefit $ — $ — $ 97 $ 54 Net actuarial (loss) gain (6,611) (976) 85 (243) Net amount recognized in equity (pretax)—Significant Plans $ (6,611) $ (976) $ 182 $ (189) Accumulated benefit obligation at period end—Significant Plans $ 13,071 $ 5,641 $ 516 $ 1,020 (1) Actuarial loss is associated with the decrease in global discount rates from March to June. (2) The U.S. qualified pension plan is fully funded under specified Employee Retirement Income Security Act of 1974, as amended (ERISA), funding rules as of January 1, 2021 and no minimum required funding is expected for 2021. (3) The nonqualified plans of the Company are unfunded. The following table shows the change in AOCI related to the Company’s pension, postretirement and post employment plans: In millions of dollars Three Months Ended June 30, 2021 Six Months Ended June 30, 2021 Beginning of period balance, net of tax (1)(2) $ (6,150) $ (6,864) Actuarial assumptions changes and plan experience (480) 950 Net asset gain (loss) due to difference between actual and expected returns 509 (209) Net amortization 66 147 Curtailment/settlement loss (3) (4) (4) Foreign exchange impact and other (7) 107 Change in deferred taxes, net 3 (190) Change, net of tax $ 87 $ 801 End of period balance, net of tax (1)(2) $ (6,063) $ (6,063) (1) See Note 17 to the Consolidated Financial Statements for further discussion of net AOCI balance. (2) Includes net-of-tax amounts for certain profit-sharing plans outside the U.S. (3) Curtailment and settlement relate to repositioning and divestiture activities. Plan Assumptions The discount rates utilized during the period in determining the pension and postretirement net (benefit) expense for the Significant Plans are as follows: Net (benefit) expense assumed discount rates during the period Three Months Ended Jun. 30, 2021 Jun. 30, 2020 U.S. plans Qualified pension 3.10 % 3.20 % Nonqualified pension 3.00 3.25 Postretirement 2.85 3.20 Non-U.S. plans Pension 0.25–9.30 0.45–9.45 Weighted average 4.26 4.38 Postretirement 9.70 9.75 The discount rates utilized at period end in determining the pension and postretirement benefit obligations for the Significant Plans are as follows: Plan obligations assumed discount rates at period ended Jun. 30, 2021 Mar. 31, 2021 Dec. 31, 2020 U.S. plans Qualified pension 2.75 % 3.10 % 2.45 % Nonqualified pension 2.70 3.00 2.35 Postretirement 2.60 2.85 2.20 Non-U.S. plans Pension 0.25–9.25 0.25–9.30 0.05–8.15 Weighted average 4.23 4.26 3.60 Postretirement 9.50 9.70 8.55 Sensitivities of Certain Key Assumptions The following table summarizes the estimated effect on the Company’s Significant Plans quarterly expense of a one-percentage-point change in the discount rate: Three Months Ended June 30, 2021 In millions of dollars One-percentage-point increase One-percentage-point decrease Pension U.S. plans $ 8 $ (11) Non-U.S. plans — 5 Postretirement U.S. plans — — Non-U.S. plans (2) 2 Contributions For the U.S. pension plans, there were no required minimum cash contributions during the first six months of 2021. The following table summarizes the Company’s actual contributions for the six months ended June 30, 2021 and 2020, as well as expected Company contributions for the remainder of 2021 and the actual contributions made in 2020: Pension plans Postretirement plans U.S. plans (1) Non-U.S. plans U.S. plans Non-U.S. plans In millions of dollars 2021 2020 2021 2020 2021 2020 2021 2020 Company contributions (2) for the six months ended June 30 $ 27 $ 28 $ 78 $ 72 $ 9 $ — $ 4 $ 5 Company contributions (reimbursements) made during the — 28 — 86 — (15) — 4 Company contributions expected to be made during 32 — 78 — 3 — 4 — (1) The U.S. plans include benefits paid directly by the Company for the nonqualified pension plans. (2) Company contributions are composed of cash contributions made to the plans and benefits paid directly by the Company. Defined Contribution Plans The following table summarizes the Company’s contributions for the defined contribution plans: Three Months Ended June 30, Six Months In millions of dollars 2021 2020 2021 2020 U.S. plans $ 106 $ 101 $ 211 $ 203 Non-U.S. plans 91 74 183 150 Post Employment Plans The following table summarizes the net expense recognized in the Consolidated Statement of Income for the Company’s U.S. post employment plans: Three Months Ended June 30, Six Months In millions of dollars 2021 2020 2021 2020 Service-related expense Amortization of unrecognized: Net actuarial loss $ 1 $ 1 $ 1 $ 1 Total service-related expense $ 1 $ 1 $ 1 $ 1 Non-service-related (benefit) expense $ (1) $ 3 $ 4 $ 8 Total net expense $ — $ 4 $ 5 $ 9

EARNINGS PER SHARE

EARNINGS PER SHARE	6 Months Ended
	Jun. 30, 2021
Earnings Per Share [Abstract]
EARNINGS PER SHARE	EARNINGS PER SHARE The following table reconciles the income and share data used in the basic and diluted earnings per share (EPS) computations: Three Months Ended June 30, Six Months Ended June 30, In millions of dollars, except per share amounts 2021 2020 2021 2020 Earnings per common share Income from continuing operations before attribution of noncontrolling interests $ 6,193 $ 1,057 $ 14,170 $ 3,605 Less: Noncontrolling interests from continuing operations 10 — 43 (6) Net income from continuing operations (for EPS purposes) $ 6,183 $ 1,057 $ 14,127 $ 3,611 Income (loss) from discontinued operations, net of taxes 10 (1) 8 (19) Citigroup’s net income $ 6,193 $ 1,056 $ 14,135 $ 3,592 Less: Preferred dividends (1) 253 253 545 544 Net income available to common shareholders $ 5,940 $ 803 $ 13,590 $ 3,048 Less: Dividends and undistributed earnings allocated to employee restricted and deferred shares with rights to dividends, applicable to basic EPS 41 11 107 32 Net income allocated to common shareholders for basic EPS $ 5,899 $ 792 $ 13,483 $ 3,016 Weighted-average common shares outstanding applicable to basic EPS (in millions) 2,056.5 2,081.7 2,069.3 2,089.8 Basic earnings per share (2) Income from continuing operations $ 2.86 $ 0.38 $ 6.51 $ 1.45 Discontinued operations — — — (0.01) Net income per share—basic $ 2.87 $ 0.38 $ 6.52 $ 1.44 Diluted earnings per share Net income allocated to common shareholders for basic EPS $ 5,899 $ 792 $ 13,483 $ 3,016 Add back: Dividends allocated to employee restricted and deferred shares with rights to dividends that are forfeitable 8 — 15 15 Net income allocated to common shareholders for diluted EPS $ 5,907 $ 792 $ 13,498 $ 3,031 Weighted-average common shares outstanding applicable to basic EPS (in millions) 2,056.5 2,081.7 2,069.3 2,089.8 Effect of dilutive securities Options (3) — — — — Other employee plans 16.5 2.6 15.5 13.2 Adjusted weighted-average common shares outstanding applicable to diluted EPS (in millions) (4) 2,073.0 2,084.3 2,084.8 2,103.0 Diluted earnings per share (2) Income from continuing operations $ 2.84 $ 0.38 $ 6.47 $ 1.45 Discontinued operations — — — (0.01) Net income per share—diluted $ 2.85 $ 0.38 $ 6.47 $ 1.44 (1) On July 15, 2021, Citi declared preferred dividends of approximately $266 million for the third quarter of 2021. During the first quarter of 2021, Citi redeemed all of its 41.4 million Series S preferred shares for $1.035 billion and 465,000 shares of its Series R preferred shares for $465 million and Citi also issued 2.3 million of Series X preferred shares for $2.3 billion. During the second quarter of 2021, Citi redeemed all of its 1.25 million Series Q preferred shares for $1.25 billion and the remaining 1.035 million Series R preferred shares for $1.035 billion. As of August 4, 2021, Citi estimates it will distribute preferred dividends of approximately $228 million in the fourth quarter of 2021, subject to such dividends being declared by the Citi Board of Directors. (2) Due to rounding, earnings per share on continuing operations and discontinued operations may not sum to earnings per share on net income. (3) During the first and second quarters of 2021 and 2020, no significant options to purchase shares of common stock were outstanding. (4) Due to rounding, weighted-average common shares outstanding applicable to basic EPS and the effect of dilutive securities may not sum to weighted-average common shares outstanding applicable to diluted EPS.

SECURITIES BORROWED, LOANED AND

SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS	6 Months Ended
	Jun. 30, 2021
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Abstract]
SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS	SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS For additional information on the Company’s resale and repurchase agreements and securities borrowing and lending agreements, see Note 11 to the Consolidated Financial Statements in Citi’s 2020 Annual Report on Form 10-K. Securities borrowed and purchased under agreements to resell , at their respective carrying values, consisted of the following: In millions of dollars June 30, December 31, 2020 Securities purchased under agreements to resell $ 209,300 $ 204,655 Deposits paid for securities borrowed 99,755 90,067 Total, net (1) $ 309,055 $ 294,722 Allowance for credit losses on securities purchased and borrowed (2) (8) (10) Total, net of allowance $ 309,047 $ 294,712 Securities loaned and sold under agreements to repurchase , at their respective carrying values, consisted of the following: In millions of dollars June 30, December 31, 2020 Securities sold under agreements to repurchase $ 198,353 $ 181,194 Deposits received for securities loaned 23,464 18,331 Total, net (1) $ 221,817 $ 199,525 (1) The above tables do not include securities-for-securities lending transactions of $3.3 billion and $6.8 billion at June 30, 2021 and December 31, 2020, respectively, where the Company acts as lender and receives securities that can be sold or pledged as collateral. In these transactions, the Company recognizes the securities received at fair value within Other assets and the obligation to return those securities as a liability within Brokerage payables . (2) See Note 14 to the Consolidated Financial Statements for further information. It is the Company’s policy to take possession of the underlying collateral, monitor its market value relative to the amounts due under the agreements and, when necessary, require prompt transfer of additional collateral in order to maintain contractual margin protection. For resale and repurchase agreements, when necessary, the Company posts additional collateral in order to maintain contractual margin protection. A substantial portion of the resale and repurchase agreements is recorded at fair value, as described in Notes 20 and 21 to the Consolidated Financial Statements. The remaining portion is carried at the amount of cash initially advanced or received, plus accrued interest, as specified in the respective agreements. A substantial portion of securities borrowing and lending agreements is recorded at the amount of cash advanced or received. The remaining portion is recorded at fair value as the Company elected the fair value option for certain securities borrowed and loaned portfolios, as described in Note 21 to the Consolidated Financial Statements. With respect to securities loaned, the Company receives cash collateral in an amount generally in excess of the market value of the securities loaned. The Company monitors the market value of securities borrowed and securities loaned on a daily basis and obtains or posts additional collateral in order to maintain contractual margin protection. The following tables present the gross and net resale and repurchase agreements and securities borrowing and lending agreements and the related offsetting amounts permitted under ASC 210-20-45. The tables also include amounts related to financial instruments that are not permitted to be offset under ASC 210-20-45, but would be eligible for offsetting to the extent that an event of default has occurred and a legal opinion supporting enforceability of the offsetting rights has been obtained. Remaining exposures continue to be secured by financial collateral, but the Company may not have sought or been able to obtain a legal opinion evidencing enforceability of the offsetting right. As of June 30, 2021 In millions of dollars Gross amounts Gross amounts (1) Net amounts of Amounts (2) Net (3) Securities purchased under agreements to resell $ 303,476 $ 94,176 $ 209,300 $ 174,835 $ 34,465 Deposits paid for securities borrowed 116,070 16,315 99,755 18,037 81,718 Total $ 419,546 $ 110,491 $ 309,055 $ 192,872 $ 116,183 In millions of dollars Gross amounts Gross amounts (1) Net amounts of Amounts (2) Net (3) Securities sold under agreements to repurchase $ 292,529 $ 94,176 $ 198,353 $ 97,308 $ 101,045 Deposits received for securities loaned 39,779 16,315 23,464 4,173 19,291 Total $ 332,308 $ 110,491 $ 221,817 $ 101,481 $ 120,336 As of December 31, 2020 In millions of dollars Gross amounts Gross amounts (1) Net amounts of Amounts (2) Net (3) Securities purchased under agreements to resell $ 362,025 $ 157,370 $ 204,655 $ 159,232 $ 45,423 Deposits paid for securities borrowed 96,425 6,358 90,067 13,474 76,593 Total $ 458,450 $ 163,728 $ 294,722 $ 172,706 $ 122,016 In millions of dollars Gross amounts Gross amounts (1) Net amounts of Amounts (2) Net (3) Securities sold under agreements to repurchase $ 338,564 $ 157,370 $ 181,194 $ 95,563 $ 85,631 Deposits received for securities loaned 24,689 6,358 18,331 7,982 10,349 Total $ 363,253 $ 163,728 $ 199,525 $ 103,545 $ 95,980 (1) Includes financial instruments subject to enforceable master netting agreements that are permitted to be offset under ASC 210-20-45. (2) Includes financial instruments subject to enforceable master netting agreements that are not permitted to be offset under ASC 210-20-45, but would be eligible for offsetting to the extent that an event of default has occurred and a legal opinion supporting enforceability of the offsetting right has been obtained. (3) Remaining exposures continue to be secured by financial collateral, but the Company may not have sought or been able to obtain a legal opinion evidencing enforceability of the offsetting right. The following tables present the gross amounts of liabilities associated with repurchase agreements and securities lending agreements by remaining contractual maturity: As of June 30, 2021 In millions of dollars Open and overnight Up to 30 days 31–90 days Greater than 90 days Total Securities sold under agreements to repurchase $ 138,514 $ 75,384 $ 31,346 $ 47,285 $ 292,529 Deposits received for securities loaned 29,519 1,058 1,677 7,525 39,779 Total $ 168,033 $ 76,442 $ 33,023 $ 54,810 $ 332,308 As of December 31, 2020 In millions of dollars Open and overnight Up to 30 days 31–90 days Greater than 90 days Total Securities sold under agreements to repurchase $ 160,754 $ 98,226 $ 41,679 $ 37,905 $ 338,564 Deposits received for securities loaned 17,038 3 2,770 4,878 24,689 Total $ 177,792 $ 98,229 $ 44,449 $ 42,783 $ 363,253 The following tables present the gross amounts of liabilities associated with repurchase agreements and securities lending agreements by class of underlying collateral: As of June 30, 2021 In millions of dollars Repurchase agreements Securities lending agreements Total U.S. Treasury and federal agency securities $ 106,277 $ — $ 106,277 State and municipal securities 700 — 700 Foreign government securities 106,812 204 107,016 Corporate bonds 22,993 265 23,258 Equity securities 26,227 39,113 65,340 Mortgage-backed securities 23,699 — 23,699 Asset-backed securities 2,052 — 2,052 Other 3,769 197 3,966 Total $ 292,529 $ 39,779 $ 332,308 As of December 31, 2020 In millions of dollars Repurchase agreements Securities lending agreements Total U.S. Treasury and federal agency securities $ 112,437 $ — $ 112,437 State and municipal securities 664 2 666 Foreign government securities 130,017 194 130,211 Corporate bonds 20,149 78 20,227 Equity securities 21,497 24,149 45,646 Mortgage-backed securities 45,566 — 45,566 Asset-backed securities 3,307 — 3,307 Other 4,927 266 5,193 Total $ 338,564 $ 24,689 $ 363,253

BROKERAGE RECEIVABLES AND BROKE

BROKERAGE RECEIVABLES AND BROKERAGE PAYABLES	6 Months Ended
	Jun. 30, 2021
Brokers and Dealers [Abstract]
BROKERAGE RECEIVABLES AND BROKERAGE PAYABLES	BROKERAGE RECEIVABLES AND BROKERAGE PAYABLES The Company has receivables and payables for financial instruments sold to and purchased from brokers, dealers and customers, which arise in the ordinary course of business. For additional information on these receivables and payables, see Note 12 to the Consolidated Financial Statements in Citi’s 2020 Annual Report on Form 10-K. Brokerage receivables and Brokerage payables consisted of the following: In millions of dollars June 30, December 31, 2020 Receivables from customers $ 26,744 $ 18,097 Receivables from brokers, dealers and clearing organizations 34,394 26,709 Total brokerage receivables (1) $ 61,138 $ 44,806 Payables to customers $ 46,413 $ 39,319 Payables to brokers, dealers and clearing organizations 13,003 11,165 Total brokerage payables (1) $ 59,416 $ 50,484

INVESTMENTS

INVESTMENTS	6 Months Ended
	Jun. 30, 2021
Investments, Debt and Equity Securities [Abstract]
INVESTMENTS	INVESTMENTS For additional information regarding Citi’s investment portfolios, including evaluating investments for impairment, see Note 13 to the Consolidated Financial Statements in Citi’s 2020 Annual Report on Form 10-K. The following table presents Citi’s investments by category: In millions of dollars June 30, December 31, 2020 Debt securities available-for-sale (AFS) $ 302,977 $ 335,084 Debt securities held-to-maturity (HTM) (1) 176,742 104,943 Marketable equity securities carried at fair value (2) 195 515 Non-marketable equity securities carried at fair value (2) 598 551 Non-marketable equity securities measured using the measurement alternative (3) 1,381 962 Non-marketable equity securities carried at cost (4) 5,170 5,304 Total investments $ 487,063 $ 447,359 (1) Carried at adjusted amortized cost basis, net of any ACL. (2) Unrealized gains and losses are recognized in earnings. (3) Impairment losses and adjustments to the carrying value as a result of observable price changes are recognized in earnings. See “Non-Marketable Equity Securities Not Carried at Fair Value” below. (4) Represents shares issued by the Federal Reserve Bank, Federal Home Loan Banks and certain exchanges of which Citigroup is a member. The following table presents interest and dividend income on investments: Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Taxable interest $ 1,723 $ 1,984 $ 3,375 $ 4,163 Interest exempt from U.S. federal income tax 57 70 123 146 Dividend income 38 43 72 69 Total interest and dividend income on investments $ 1,818 $ 2,097 $ 3,570 $ 4,378 The following table presents realized gains and losses on the sales of investments, which exclude impairment losses: Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Gross realized investment gains $ 155 $ 775 $ 615 $ 1,237 Gross realized investment losses (18) (27) (77) (57) Net realized gains on sales of investments $ 137 $ 748 $ 538 $ 1,180 Debt Securities Available-for-Sale The amortized cost and fair value of AFS debt securities were as follows: June 30, 2021 December 31, 2020 In millions of dollars Amortized Gross Gross Allowance for credit losses Fair Amortized Gross Gross Allowance for credit losses Fair Debt securities AFS Mortgage-backed securities (1) U.S. government-sponsored agency guaranteed $ 38,842 $ 697 $ 229 $ — $ 39,310 $ 42,836 $ 1,134 $ 52 $ — $ 43,918 Non-U.S. residential 403 1 — — 404 568 3 — — 571 Commercial 43 — — — 43 49 1 — — 50 Total mortgage-backed securities $ 39,288 $ 698 $ 229 $ — $ 39,757 $ 43,453 $ 1,138 $ 52 $ — $ 44,539 U.S. Treasury and federal agency securities U.S. Treasury $ 125,224 $ 1,336 $ 413 $ — $ 126,147 $ 144,094 $ 2,108 $ 49 $ — $ 146,153 Agency obligations — — — — — 50 1 — — 51 Total U.S. Treasury and federal agency securities $ 125,224 $ 1,336 $ 413 $ — $ 126,147 $ 144,144 $ 2,109 $ 49 $ — $ 146,204 State and municipal $ 3,096 $ 95 $ 112 $ — $ 3,079 $ 3,753 $ 123 $ 157 $ — $ 3,719 Foreign government 120,122 587 492 — 120,217 123,467 1,623 122 — 124,968 Corporate 7,902 74 68 5 7,903 10,444 152 91 5 10,500 Asset-backed securities (1) 211 — — — 211 277 5 4 — 278 Other debt securities 5,661 2 — — 5,663 4,871 5 — — 4,876 Total debt securities AFS $ 301,504 $ 2,792 $ 1,314 $ 5 $ 302,977 $ 330,409 $ 5,155 $ 475 $ 5 $ 335,084 (1) The Company invests in mortgage- and asset-backed securities, which are typically issued by VIEs through securitization transactions. The Company’s maximum exposure to loss from these VIEs is equal to the carrying amount of the securities, which is reflected in the table above. For mortgage- and asset-backed securitizations in which the Company has other involvement, see Note 18 to the Consolidated Financial Statements. The following table shows the fair value of AFS debt securities that have been in an unrealized loss position: Less than 12 months 12 months or longer Total In millions of dollars Fair Gross Fair Gross Fair Gross June 30, 2021 Debt securities AFS Mortgage-backed securities U.S. government-sponsored agency guaranteed $ 14,217 $ 208 $ 343 $ 21 $ 14,560 $ 229 Non-U.S. residential 22 — — — 22 — Total mortgage-backed securities $ 14,239 $ 208 $ 343 $ 21 $ 14,582 $ 229 U.S. Treasury $ 52,548 $ 413 $ — $ — $ 52,548 $ 413 State and municipal 101 2 1,107 110 1,208 112 Foreign government 43,680 363 6,510 129 50,190 492 Corporate 1,896 67 19 1 1,915 68 Asset-backed securities 3 — — — 3 — Other debt securities 2,263 — — — 2,263 — Total debt securities AFS $ 114,730 $ 1,053 $ 7,979 $ 261 $ 122,709 $ 1,314 December 31, 2020 Debt securities AFS Mortgage-backed securities U.S. government-sponsored agency guaranteed $ 3,588 $ 30 $ 298 $ 22 $ 3,886 $ 52 Non-U.S. residential 1 — — — 1 — Commercial 7 — 4 — 11 — Total mortgage-backed securities $ 3,596 $ 30 $ 302 $ 22 $ 3,898 $ 52 U.S. Treasury and federal agency securities U.S. Treasury $ 25,031 $ 49 $ — $ — $ 25,031 $ 49 Agency obligations 50 — — — 50 — Total U.S. Treasury and federal agency securities $ 25,081 $ 49 $ — $ — $ 25,081 $ 49 State and municipal $ 836 $ 34 $ 893 $ 123 $ 1,729 $ 157 Foreign government 29,344 61 3,502 61 32,846 122 Corporate 1,083 90 24 1 1,107 91 Asset-backed securities 194 3 39 1 233 4 Other debt securities 182 — — — 182 — Total debt securities AFS $ 60,316 $ 267 $ 4,760 $ 208 $ 65,076 $ 475 The following table presents the amortized cost and fair value of AFS debt securities by contractual maturity dates: June 30, 2021 December 31, 2020 In millions of dollars Amortized Fair Amortized Fair Mortgage-backed securities (1) Due within 1 year $ 107 $ 107 $ 27 $ 27 After 1 but within 5 years 315 317 567 571 After 5 but within 10 years 679 732 688 757 After 10 years (2) 38,187 38,601 42,171 43,184 Total $ 39,288 $ 39,757 $ 43,453 $ 44,539 U.S. Treasury and federal agency securities Due within 1 year $ 30,179 $ 30,264 $ 34,834 $ 34,951 After 1 but within 5 years 93,736 94,589 108,160 110,091 After 5 but within 10 years 1,309 1,294 1,150 1,162 After 10 years (2) — — — — Total $ 125,224 $ 126,147 $ 144,144 $ 146,204 State and municipal Due within 1 year $ 379 $ 379 $ 427 $ 428 After 1 but within 5 years 92 94 189 198 After 5 but within 10 years 245 250 276 267 After 10 years (2) 2,380 2,356 2,861 2,826 Total $ 3,096 $ 3,079 $ 3,753 $ 3,719 Foreign government Due within 1 year $ 48,404 $ 48,458 $ 48,133 $ 48,258 After 1 but within 5 years 64,721 64,846 67,365 68,586 After 5 but within 10 years 4,900 4,803 5,908 6,011 After 10 years (2) 2,097 2,110 2,061 2,113 Total $ 120,122 $ 120,217 $ 123,467 $ 124,968 All other (3) Due within 1 year $ 6,436 $ 6,435 $ 6,661 $ 6,665 After 1 but within 5 years 6,200 6,234 7,814 7,891 After 5 but within 10 years 1,078 1,080 1,018 1,034 After 10 years (2) 60 28 99 64 Total $ 13,774 $ 13,777 $ 15,592 $ 15,654 Total debt securities AFS $ 301,504 $ 302,977 $ 330,409 $ 335,084 (1) Includes mortgage-backed securities of U.S. government-sponsored agencies. The Company invests in mortgage- and asset-backed securities, which are typically issued by VIEs through securitization transactions. (2) Investments with no stated maturities are included as contractual maturities of greater than 10 years. Actual maturities may differ due to call or prepayment rights. (3) Includes corporate, asset-backed and other debt securities. Debt Securities Held-to-Maturity The carrying value and fair value of debt securities HTM were as follows: In millions of dollars Amortized cost, net (1) Gross Gross Fair June 30, 2021 Debt securities HTM Mortgage-backed securities (2) U.S. government-sponsored agency guaranteed $ 65,387 $ 1,525 $ 472 $ 66,440 Non-U.S. residential 757 1 — 758 Commercial 891 2 2 891 Total mortgage-backed securities $ 67,035 $ 1,528 $ 474 $ 68,089 U.S. Treasury securities $ 72,342 $ 120 $ 452 $ 72,010 State and municipal (3) 9,030 655 9 9,676 Foreign government 1,755 25 14 1,766 Asset-backed securities (2) 26,580 12 31 26,561 Total debt securities HTM, net $ 176,742 $ 2,340 $ 980 $ 178,102 December 31, 2020 Debt securities HTM Mortgage-backed securities (2) U.S. government-sponsored agency guaranteed $ 49,004 $ 2,162 $ 15 $ 51,151 Non-U.S. residential 1,124 3 1 1,126 Commercial 825 1 1 825 Total mortgage-backed securities $ 50,953 $ 2,166 $ 17 $ 53,102 U.S. Treasury securities (4) $ 21,293 $ 4 $ 55 $ 21,242 State and municipal 9,185 755 11 9,929 Foreign government 1,931 91 — 2,022 Asset-backed securities (2) 21,581 6 92 21,495 Total debt securities HTM, net $ 104,943 $ 3,022 $ 175 $ 107,790 (1) Amortized cost is reported net of ACL of $83 million and $86 million at June 30, 2021 and December 31, 2020, respectively. (2) The Company invests in mortgage- and asset-backed securities. These securitizations are generally considered VIEs. The Company’s maximum exposure to loss from these VIEs is equal to the carrying amount of the securities, which is reflected in the table above. For mortgage- and asset-backed securitizations in which the Company has other involvement, see Note 18 to the Consolidated Financial Statements. (3) In February 2021, Citibank transferred $237 million of state and municipal bonds from AFS classification to HTM classification in accordance with ASC 320. At the time of transfer, the securities were in an unrealized gain position of $14 million. The gain amounts will remain in AOCI and will be amortized over the remaining life of the securities. (4) In August 2020, Citibank transferred $13.1 billion of investments in U.S. Treasury securities from AFS classification to HTM classification in accordance with ASC 320. At the time of transfer, the securities were in an unrealized gain position of $144 million. The gain amounts will remain in AOCI and will be amortized over the remaining life of the securities. The following table presents the carrying value and fair value of HTM debt securities by contractual maturity dates: June 30, 2021 December 31, 2020 In millions of dollars Amortized cost (1) Fair value Amortized cost (1) Fair value Mortgage-backed securities Due within 1 year $ 307 $ 304 $ 81 $ 81 After 1 but within 5 years 855 919 463 477 After 5 but within 10 years 1,571 1,676 1,699 1,873 After 10 years (2) 64,302 65,190 48,710 50,671 Total $ 67,035 $ 68,089 $ 50,953 $ 53,102 U.S. Treasury securities Due within 1 year $ — $ — $ — $ — After 1 but within 5 years 32,125 31,742 18,955 19,127 After 5 but within 10 years 40,217 40,268 2,338 2,115 After 10 years (2) — — — — Total $ 72,342 $ 72,010 $ 21,293 $ 21,242 State and municipal Due within 1 year $ 11 $ 11 $ 6 $ 6 After 1 but within 5 years 193 197 139 142 After 5 but within 10 years 742 785 818 869 After 10 years (2) 8,084 8,683 8,222 8,912 Total $ 9,030 $ 9,676 $ 9,185 $ 9,929 Foreign government Due within 1 year $ 344 $ 347 $ 361 $ 360 After 1 but within 5 years 1,411 1,419 1,570 1,662 After 5 but within 10 years — — — — After 10 years (2) — — — — Total $ 1,755 $ 1,766 $ 1,931 $ 2,022 All other (3) Due within 1 year $ — $ — $ — $ — After 1 but within 5 years — — — — After 5 but within 10 years 10,452 10,449 11,795 15,020 After 10 years (2) 16,128 16,112 9,786 6,475 Total $ 26,580 $ 26,561 $ 21,581 $ 21,495 Total debt securities HTM $ 176,742 $ 178,102 $ 104,943 $ 107,790 (1) Amortized cost is reported net of ACL of $83 million and $86 million at June 30, 2021 and December 31, 2020, respectively. (2) Investments with no stated maturities are included as contractual maturities of greater than 10 years. Actual maturities may differ due to call or prepayment rights. (3) Includes corporate and asset-backed securities. HTM Debt Securities Delinquency and Non-Accrual Details Citi did not have any HTM securities that were delinquent or on non-accrual status at June 30, 2021 and December 31, 2020. There were no purchased credit-deteriorated HTM debt securities held by the Company as of June 30, 2021 and December 31, 2020. Evaluating Investments for Impairment AFS Debt Securities Overview—AFS Debt Securities The Company conducts periodic reviews of all AFS debt securities with unrealized losses to evaluate whether the impairment resulted from expected credit losses or from other factors and to evaluate the Company’s intent to sell such securities. An AFS debt security is impaired when the current fair value of an individual AFS debt security is less than its amortized cost basis. The Company recognizes the entire difference between amortized cost basis and fair value in earnings for impaired AFS debt securities that Citi has an intent to sell or for which Citi believes it will more-likely-than-not be required to sell prior to recovery of the amortized cost basis. However, for those AFS debt securities that the Company does not intend to sell and is not likely to be required to sell, only the credit-related impairment is recognized in earnings by recording an allowance for credit losses. Any remaining fair value decline for such securities is recorded in AOCI . The Company does not consider the length of time that the fair value of a security is below its amortized cost when determining if a credit loss exists. For AFS debt securities, credit losses exist where Citi does not expect to receive contractual principal and interest cash flows sufficient to recover the entire amortized cost basis of a security. The allowance for credit losses is limited to the amount by which the AFS debt security’s amortized cost basis exceeds its fair value. The allowance is increased or decreased if credit conditions subsequently worsen or improve. Reversals of credit losses are recognized in earnings. The Company’s review for impairment of AFS debt securities generally entails: • identification and evaluation of impaired investments; • consideration of evidential matter, including an evaluation of factors or triggers that could cause individual positions to qualify as credit impaired and those that would not support credit impairment; and • documentation of the results of these analyses, as required under Citi’s policies. The sections below describe the Company’s process for identifying expected credit impairments for debt security types that have the most significant unrealized losses as of June 30, 2021. Mortgage-Backed Securities Citi records no allowances for credit losses on U.S. government-agency-guaranteed mortgage-backed securities, because the Company expects to incur no credit losses in the event of default due to a history of incurring no credit losses and due to the nature of the counterparties. State and Municipal Securities The process for estimating credit losses in Citigroup’s AFS state and municipal bonds is primarily based on a credit analysis that incorporates third-party credit ratings. Citi monitors the bond issuers and any insurers providing default protection in the form of financial guarantee insurance. The average external credit rating, ignoring any insurance, is Aa2/AA. In the event of an external rating downgrade or other indicator of credit impairment (i.e., based on instrument-specific estimates of cash flows or probability of issuer default), the subject bond is specifically reviewed for adverse changes in the amount or timing of expected contractual principal and interest payments. For AFS state and municipal bonds with unrealized losses that Citi plans to sell or would more-likely-than-not be required to sell, the full impairment is recognized in earnings. For AFS state and municipal bonds where Citi has no intent to sell and it is more-likely-than-not that the Company will not be required to sell, Citi records an allowance for expected credit losses for the amount it expects not to collect, capped at the difference between the bond’s amortized cost basis and fair value. Equity Method Investments Management assesses equity method investments that have fair values that are less than their respective carrying values for other-than-temporary impairment (OTTI). Fair value is measured as price multiplied by quantity if the investee has publicly listed securities. If the investee is not publicly listed, other methods are used (see Note 20 to the Consolidated Financial Statements). For impaired equity method investments that Citi plans to sell prior to recovery of value or would more-likely-than-not be required to sell, with no expectation that the fair value will recover prior to the expected sale date, the full impairment is recognized as OTTI in Other revenue regardless of severity and duration. The measurement of the OTTI does not include partial projected recoveries subsequent to the balance sheet date. For impaired equity method investments that management does not plan to sell and is not more-likely-than-not to be required to sell prior to recovery of value, the evaluation of whether an impairment is other-than-temporary is based on (i) whether and when an equity method investment will recover in value and (ii) whether the investor has the intent and ability to hold that investment for a period of time sufficient to recover the value. The determination of whether the impairment is considered other-than-temporary considers the following indicators: • the cause of the impairment and the financial condition and near-term prospects of the issuer, including any specific events that may influence the operations of the issuer; • the intent and ability to hold the investment for a period of time sufficient to allow for any anticipated recovery in market value; and • the length of time and extent to which fair value has been less than the carrying value. Recognition and Measurement of Impairment The following tables present total impairment on Investments recognized in earnings: Three Months Ended Three Months Ended In millions of dollars AFS Other Total AFS Other assets Total Impairment losses related to debt securities that the Company does not intend to sell nor will likely be required to sell: Total impairment losses recognized during the period $ — $ — $ — $ — $ — $ — Less: portion of impairment loss recognized in AOCI (before taxes) — — — — — — Net impairment losses recognized in earnings for debt securities that the Company does not intend to sell nor will likely be required to sell $ — $ — $ — $ — $ — $ — Impairment losses recognized in earnings for debt securities that the Company intends to sell, would more-likely-than-not be required to sell or will be subject to an issuer call deemed probable of exercise 9 — 9 19 — 19 Total impairment losses recognized in earnings $ 9 $ — $ 9 $ 19 $ — $ 19 Six Months Ended Six Months Ended In millions of dollars AFS Other Total AFS Other assets Total Impairment losses related to debt securities that the Company does not intend to sell nor will likely be required to sell: Total impairment losses recognized during the period $ — $ — $ — $ — $ — $ — Less: portion of impairment loss recognized in AOCI (before taxes) — — — — — — Net impairment losses recognized in earnings for debt securities that the Company does not intend to sell nor will likely be required to sell $ — $ — $ — $ — $ — $ — Impairment losses recognized in earnings for debt securities that the Company intends to sell, would more-likely-than-not be required to sell or will be subject to an issuer call deemed probable of exercise 78 — 78 71 — 71 Total impairment losses recognized in earnings $ 78 $ — $ 78 $ 71 $ — $ 71 Allowance for Credit Losses on AFS Debt Securities Three Months Ended June 30, 2021 In millions of dollars Mortgage-backed U.S. Treasury and federal agency State and municipal Foreign government Corporate Total AFS Allowance for credit losses at beginning of period $ — $ — $ — $ — $ 5 $ 5 Less: Write-offs — — — — — — Recoveries of amounts written-off — — — — — — Net credit losses (NCLs) $ — $ — $ — $ — $ — $ — NCLs $ — $ — $ — $ — $ — $ — Credit losses on securities without previous credit losses — — — — — — Net reserve builds (releases) on securities with previous credit losses — — — — — — Total provision for credit losses $ — $ — $ — $ — $ — $ — Initial allowance on newly purchased credit-deteriorated securities during the period — — — — — — Allowance for credit losses at end of period $ — $ — $ — $ — $ 5 $ 5 Six Months Ended June 30, 2021 In millions of dollars Mortgage-backed U.S. Treasury and federal agency State and municipal Foreign government Corporate Total AFS Allowance for credit losses at beginning of period $ — $ — $ — $ — $ 5 $ 5 Less: Write-offs — — — — — — Recoveries of amounts written-off — — — — — — Net credit losses (NCLs) $ — $ — $ — $ — $ — $ — NCLs $ — $ — $ — $ — $ — $ — Credit losses on securities without previous credit losses — — — — — — Net reserve builds (releases) on securities with previous credit losses — — — — — — Total provision for credit losses $ — $ — $ — $ — $ — $ — Initial allowance on newly purchased credit-deteriorated securities during the period — — — — — — Allowance for credit losses at end of period $ — $ — $ — $ — $ 5 $ 5 Three Months Ended June 30, 2020 In millions of dollars Mortgage-backed U.S. Treasury and federal agency State and municipal Foreign government Corporate Total AFS Allowance for credit losses at beginning of period $ — $ — $ — $ — $ — $ — Less: Write-offs — — — — — — Recoveries of amounts written-off — — — — — — Net credit losses (NCLs) $ — $ — $ — $ — $ — $ — NCLs $ — $ — $ — $ — $ — $ — Credit losses on securities without previous credit losses — — — 3 5 8 Net reserve builds (releases) on securities with previous credit losses — — — — — — Total provision for credit losses $ — $ — $ — $ 3 $ 5 $ 8 Initial allowance on newly purchased credit-deteriorated securities during the period — — — — — — Allowance for credit losses at end of period $ — $ — $ — $ 3 $ 5 $ 8 Six Months Ended June 30, 2020 In millions of dollars Mortgage-backed U.S. Treasury and federal agency State and municipal Foreign government Corporate Total AFS Allowance for credit losses at beginning of period $ — $ — $ — $ — $ — $ — Less: Write-offs — — — — — — Recoveries of amounts written-off — — — — — — Net credit losses (NCLs) $ — $ — $ — $ — $ — $ — NCLs $ — $ — $ — $ — $ — $ — Credit losses on securities without previous credit losses — — — 3 5 8 Net reserve builds (releases) on securities with previous credit losses — — — — — — Total provision for credit losses $ — $ — $ — $ 3 $ 5 $ 8 Initial allowance on newly purchased credit-deteriorated securities during the period — — — — — — Allowance for credit losses at end of period $ — $ — $ — $ 3 $ 5 $ 8 Non-Marketable Equity Securities Not Carried at Fair Value Non-marketable equity securities are required to be measured at fair value with changes in fair value recognized in earnings unless (i) the measurement alternative is elected or (ii) the investment represents Federal Reserve Bank and Federal Home Loan Bank stock or certain exchange seats that continue to be carried at cost. The election to measure a non-marketable equity security using the measurement alternative is made on an instrument-by-instrument basis. Under the measurement alternative, an equity security is carried at cost plus or minus changes resulting from observable prices in orderly transactions for the identical or a similar investment of the same issuer. The carrying value of the equity security is adjusted to fair value on the date of an observed transaction. Fair value may differ from the observed transaction price due to a number of factors, including marketability adjustments and differences in rights and obligations when the observed transaction is not for the identical investment held by Citi. Equity securities under the measurement alternative are also assessed for impairment. On a quarterly basis, management qualitatively assesses whether each equity security under the measurement alternative is impaired. Impairment indicators that are considered include, but are not limited to, the following: • a significant deterioration in the earnings performance, credit rating, asset quality or business prospects of the investee; • a significant adverse change in the regulatory, economic or technological environment of the investee; • a significant adverse change in the general market condition of either the geographical area or the industry in which the investee operates; • a bona fide offer to purchase, an offer by the investee to sell or a completed auction process for the same or similar investment for an amount less than the carrying amount of that investment; and • factors that raise significant concerns about the investee’s ability to continue as a going concern, such as negative cash flows from operations, working capital deficiencies or noncompliance with statutory capital requirements or debt covenants. When the qualitative assessment indicates that impairment exists, the investment is written down to fair value, with the full difference between the fair value of the investment and its carrying amount recognized in earnings. Below is the carrying value of non-marketable equity securities measured using the measurement alternative at June 30, 2021 and December 31, 2020: In millions of dollars June 30, 2021 December 31, 2020 Measurement alternative: Carrying value $ 1,381 $ 962 Below are amounts recognized in earnings and life-to-date amounts for non-marketable equity securities measured using the measurement alternative: Three Months Ended Six Months In millions of dollars 2021 2020 2021 2020 Measurement alternative: (1) Impairment losses $ 4 $ 50 $ 4 $ 53 Downward changes for observable prices — 19 — 19 Upward changes for observable prices 215 17 296 42 (1) See Note 20 to the Consolidated Financial Statements for additional information on these nonrecurring fair value measurements. Life-to-date amounts on securities still held In millions of dollars June 30, 2021 Measurement alternative: Impairment losses $ 73 Downward changes for observable prices 53 Upward changes for observable prices 783 A similar impairment analysis is performed for non-marketable equity securities carried at cost. For the three and six months ended June 30, 2021 and 2020, there was no impairment loss recognized in earnings for non-marketable equity securities carried at cost. Investments in Alternative Investment Funds That Calculate Net Asset Value The Company holds investments in certain alternative investment funds that calculate net asset value (NAV), or its equivalent, including private equity funds, funds of funds and real estate funds, as provided by third-party asset managers. Investments in such funds are generally classified as non-marketable equity securities carried at fair value. The fair values of these investments are estimated using the NAV of the Company’s ownership interest in the funds. Some of these investments are in “covered funds” for purposes of the Volcker Rule, which prohibits certain proprietary investment activities and limits the ownership of, and relationships with, covered funds. On April 21, 2017, Citi’s request for extension of the permitted holding period under the Volcker Rule for certain of its investments in illiquid funds was approved, allowing the Company to hold such investments until the earlier of five years from the July 21, 2017 expiration date of the general conformance period or the date such investments mature or are otherwise conformed with the Volcker Rule. Fair value Unfunded Redemption frequency Redemption In millions of dollars June 30, December 31, 2020 June 30, December 31, 2020 Private equity funds (1)(2) $ 124 $ 123 $ 60 $ 62 — — Real estate funds (2)(3) 2 9 3 20 — — Mutual/collective investment funds 21 20 — — — — Total $ 147 $ 152 $ 63 $ 82 — — (1) Private equity funds include funds that invest in infrastructure, emerging markets and venture capital. (2) With respect to the Company’s investments in private equity funds and real estate funds, distributions from each fund will be received as the underlying assets held by these funds are liquidated. It is estimated that the underlying assets of these funds will be liquidated over a period of several years as market conditions allow. Private equity and real estate funds do not allow redemption of investments by their investors. Investors are permitted to sell or transfer their investments, subject to the approval of the general partner or investment manager of these funds, which generally may not be unreasonably withheld. (3) Includes several real estate funds that invest primarily in commercial real estate in the U.S., Europe and Asia.

LOANS

LOANS	6 Months Ended
	Jun. 30, 2021
Loans and Leases Receivable Disclosure [Abstract]
LOANS	LOANS Citigroup loans are reported in two categories: consumer and corporate. These categories are classified primarily according to the segment and subsegment that manage the loans. For additional information regarding Citi’s consumer and corporate loans, including related accounting policies, see Note 1 to the Consolidated Financial Statements and Notes 1 and 14 to the Consolidated Financial Statements in Citi’s 2020 Annual Report on Form 10-K. Consumer Loans Consumer loans represent loans and leases managed primarily by GCB and Corporate/Other . Consumer Loans, Delinquencies and Non-Accrual Status at June 30, 2021 In millions of dollars Total current (1)(2) 30–89 days past due (3)(4) ≥ 90 days past due (3)(4) Past due government guaranteed (5) Total loans Non-accrual loans for which there is no ACLL Non-accrual loans for which there is an ACLL Total 90 days In North America offices (6) Residential first mortgages (7) $ 43,811 $ 315 $ 307 $ 402 $ 44,835 $ 133 $ 407 $ 540 $ 257 Home equity loans (8)(9) 5,937 51 180 — 6,168 68 253 321 — Credit cards 123,133 770 920 — 124,823 — — — 920 Personal, small business and other 3,655 13 8 — 3,676 — 18 18 — Total $ 176,536 $ 1,149 $ 1,415 $ 402 $ 179,502 $ 201 $ 678 $ 879 $ 1,177 In offices outside North America (6) Residential first mortgages (7) $ 39,964 $ 184 $ 196 $ — $ 40,344 $ — $ 476 $ 476 $ — Credit cards 20,162 304 310 — 20,776 — 233 233 232 Personal, small business and other 34,910 235 128 — 35,273 — 218 218 — Total $ 95,036 $ 723 $ 634 $ — $ 96,393 $ — $ 927 $ 927 $ 232 Total Citigroup (10) $ 271,572 $ 1,872 $ 2,049 $ 402 $ 275,895 $ 201 $ 1,605 $ 1,806 $ 1,409 (1) Loans less than 30 days past due are presented as current. (2) Includes $14 million of residential first mortgages recorded at fair value. (3) Excludes loans guaranteed by U.S. government-sponsored agencies. (4) Loans modified under Citi’s consumer relief programs continue to be reported in the same delinquency bucket they were in at the time of modification. Most modified loans in North America would not be reported as 30–89 or 90+ days past due for the duration of the programs (which have various durations, and certain of which may be renewed by the customer). Consumer relief programs in Asia and Mexico largely expired during the fourth quarter of 2020 and began to age at that time. (5) Consists of residential first mortgages that are guaranteed by U.S. government-sponsored agencies that are 30–89 days past due of $0.1 billion and 90 days or more past due of $0.3 billion. (6) North America includes the U.S., Canada and Puerto Rico. Mexico is included in offices outside North America. (7) Includes approximately $0.1 billion of residential first mortgage loans in process of foreclosure. (8) Includes approximately $0.1 billion of home equity loans in process of foreclosure. (9) Fixed-rate home equity loans and loans extended under home equity lines of credit, which are typically in junior lien positions. (10) Consumer loans are net of unearned income of $676 million. Unearned income on consumer loans primarily represents unamortized origination fees and costs, premiums and discounts. Interest Income Recognized for Non-Accrual Consumer Loans In millions of dollars Three Months Ended June 30, 2021 Three Months Ended June 30, 2020 Six Months Ended June 30, 2021 Six Months Ended June 30, 2020 In North America offices (1) Residential first mortgages $ 3 $ 4 $ 6 $ 7 Home equity loans 2 2 4 4 Credit cards — — — — Personal, small business and other — — — — Total $ 5 $ 6 $ 10 $ 11 In offices outside North America (1) Residential first mortgages $ — $ — $ — $ — Credit cards — — — — Personal, small business and other — — — — Total $ — $ — $ — $ — Total Citigroup $ 5 $ 6 $ 10 $ 11 (1) North America includes the U.S., Canada and Puerto Rico. Mexico is included in offices outside North America. Consumer Loans, Delinquencies and Non-Accrual Status at December 31, 2020 In millions of dollars Total current (1)(2) 30–89 days past due (3)(4) ≥ 90 days past due (3)(4) Past due government guaranteed (5) Total Non-accrual loans for which there is no ACLL Non-accrual loans for which there is an ACLL Total 90 days In North America offices (6) Residential first mortgages (7) $ 46,471 $ 402 $ 381 $ 524 $ 47,778 $ 136 $ 509 $ 645 $ 332 Home equity loans (8)(9) 6,829 78 221 — 7,128 72 307 379 — Credit cards 127,827 1,228 1,330 — 130,385 — — — 1,330 Personal, small business and other 4,472 27 10 — 4,509 2 33 35 — Total $ 185,599 $ 1,735 $ 1,942 $ 524 $ 189,800 $ 210 $ 849 $ 1,059 $ 1,662 In offices outside North America (6) Residential first mortgages (7) $ 39,557 $ 213 $ 199 $ — $ 39,969 $ — $ 486 $ 486 $ — Credit cards 21,718 429 545 — 22,692 — 384 384 376 Personal, small business and other 35,925 319 134 — 36,378 — 212 212 — Total $ 97,200 $ 961 $ 878 $ — $ 99,039 $ — $ 1,082 $ 1,082 $ 376 Total Citigroup (10) $ 282,799 $ 2,696 $ 2,820 $ 524 $ 288,839 $ 210 $ 1,931 $ 2,141 $ 2,038 (1) Loans less than 30 days past due are presented as current. (2) Includes $14 million of residential first mortgages recorded at fair value. (3) Excludes loans guaranteed by U.S. government-sponsored agencies. (4) Loans modified under Citi’s consumer relief programs continue to be reported in the same delinquency bucket they were in at the time of modification, and thus almost all would not be reported as 30–89 or 90+ days past due for the duration of the programs (which have various durations, and certain of which may be renewed by the customer). (5) Consists of residential first mortgages that are guaranteed by U.S. government-sponsored agencies that are 30–89 days past due of $0.2 billion and 90 days or more past due of $0.3 billion. (6) North America includes the U.S., Canada and Puerto Rico. Mexico is included in offices outside North America. (7) Includes approximately $0.1 billion of residential first mortgage loans in process of foreclosure. (8) Includes approximately $0.1 billion of home equity loans in process of foreclosure. (9) Fixed-rate home equity loans and loans extended under home equity lines of credit, which are typically in junior lien positions. (10) Consumer loans are net of unearned income of $749 million. Unearned income on consumer loans primarily represents unamortized origination fees and costs, premiums and discounts. During the three and six months ended June 30, 2021, the Company sold and/or reclassified to HFS $95 million and $191 million of consumer loans, respectively. During the three and six months ended June 30, 2020, the Company sold and/or reclassified to HFS $12 million and $36 million of consumer loans, respectively. Consumer Credit Scores (FICO) The following tables provide details on the Fair Isaac Corporation (FICO) scores for Citi’s U.S. consumer loan portfolio based on end-of-period receivables by year of origination. FICO scores are updated monthly for substantially all of the portfolio or, otherwise, on a quarterly basis for the remaining portfolio. FICO score distribution in U.S. portfolio (1)(2) June 30, 2021 In millions of dollars Less than 680 Greater FICO not available Total loans Residential first mortgages 2021 $ 40 $ 1,465 $ 3,637 2020 213 3,175 8,605 2019 127 1,527 4,063 2018 208 533 919 2017 257 697 1,403 Prior 1,707 4,593 9,816 Total residential first mortgages $ 2,552 $ 11,990 $ 28,443 $ 1,850 $ 44,835 Credit cards (3) $ 21,014 $ 50,253 $ 50,827 $ 2,201 $ 124,295 Home equity loans (pre-reset) $ 237 $ 932 $ 1,470 Home equity loans (post-reset) 846 1,347 1,327 Total home equity loans $ 1,083 $ 2,279 $ 2,797 $ 9 $ 6,168 Personal, small business and other 2021 $ 8 $ 35 $ 68 2020 24 56 95 2019 55 77 99 2018 51 55 58 2017 14 16 18 Prior 122 177 142 Total personal, small business and other $ 274 $ 416 $ 480 $ 2,506 $ 3,676 Total $ 24,923 $ 64,938 $ 82,547 $ 6,566 $ 178,974 FICO score distribution in U.S. portfolio (1)(2) December 31, 2020 In millions of dollars Less than 680 Greater FICO not available Total Residential first mortgages 2020 $ 187 $ 3,741 $ 9,052 2019 150 1,857 5,384 2018 246 655 1,227 2017 298 846 1,829 2016 323 1,368 3,799 Prior 1,708 4,133 9,105 Total residential first mortgages $ 2,912 $ 12,600 $ 30,396 $ 1,870 $ 47,778 Credit cards (3) $ 26,227 $ 52,778 $ 49,767 $ 1,041 $ 129,813 Home equity loans (pre-reset) $ 292 $ 1,014 $ 1,657 Home equity loans (post-reset) 1,055 1,569 1,524 Total home equity loans $ 1,347 $ 2,583 $ 3,181 $ 17 $ 7,128 Personal, small business and other 2020 $ 23 $ 58 $ 95 2019 79 106 134 2018 82 80 84 2017 26 27 30 2016 10 9 8 Prior 214 393 529 Total personal, small business and other $ 434 $ 673 $ 880 $ 2,522 $ 4,509 Total $ 30,920 $ 68,634 $ 84,224 $ 5,450 $ 189,228 (1) The FICO bands in the tables are consistent with general industry peer presentations. (2) FICO scores are updated on either a monthly or quarterly basis. For updates that are made only quarterly, certain current-period loans by year of origination are greater than those disclosed in the prior periods. Loans that did not have FICO scores as of the prior period have been updated with FICO scores as they become available. (3) Excludes $528 million and $572 million of balances related to Canada for June 30, 2021 and December 31, 2020, respectively. Loan to Value (LTV) Ratios The following tables provide details on the LTV ratios for Citi’s U.S. consumer mortgage portfolios by year of origination. LTV ratios are updated monthly using the most recent Core Logic Home Price Index data available for substantially all of the portfolio applied at the Metropolitan Statistical Area level, if available, or the state level if not. The remainder of the portfolio is updated in a similar manner using the Federal Housing Finance Agency indices. LTV distribution in U.S. portfolio June 30, 2021 In millions of dollars Less than > 80% but less Greater LTV not available Total Residential first mortgages 2021 $ 4,698 $ 454 $ — 2020 11,573 430 — 2019 5,513 211 3 2018 1,398 262 7 2017 2,232 130 3 Prior 16,129 73 13 Total residential first mortgages $ 41,543 $ 1,560 $ 26 $ 1,706 $ 44,835 Home equity loans (pre-reset) $ 2,562 $ 42 $ 14 Home equity loans (post-reset) 3,324 145 35 Total home equity loans $ 5,886 $ 187 $ 49 $ 46 $ 6,168 Total $ 47,429 $ 1,747 $ 75 $ 1,752 $ 51,003 LTV distribution in U.S. portfolio December 31, 2020 In millions of dollars Less than > 80% but less Greater LTV not available Total Residential first mortgages 2020 $ 11,447 $ 1,543 $ — 2019 7,029 376 2 2018 1,617 507 11 2017 2,711 269 4 2016 5,423 84 2 Prior 14,966 66 16 Total residential first mortgages $ 43,193 $ 2,845 $ 35 $ 1,705 $ 47,778 Home equity loans (pre-reset) $ 2,876 $ 50 $ 16 Home equity loans (post-reset) 3,782 290 58 Total home equity loans $ 6,658 $ 340 $ 74 $ 56 $ 7,128 Total $ 49,851 $ 3,185 $ 109 $ 1,761 $ 54,906 Impaired Consumer Loans The following tables present information about impaired consumer loans and interest income recognized on impaired consumer loans: Three Months Ended Six Months Ended Balance at June 30, 2021 2021 2020 2021 2020 In millions of dollars Recorded investment (1)(2) Unpaid Related specific allowance (3) Average carrying value (4) Interest income (5) Interest income (5) Interest income (5) Interest income (5) Mortgage and real estate Residential first mortgages $ 1,606 $ 1,768 $ 122 $ 1,689 $ 21 $ 15 $ 42 $ 29 Home equity loans 433 587 33 468 3 4 6 7 Credit cards 1,906 1,942 770 1,951 33 25 68 51 Personal, small business and other 524 675 159 524 15 16 27 32 Total $ 4,469 $ 4,972 $ 1,084 $ 4,632 $ 72 $ 60 $ 143 $ 119 Balance at December 31, 2020 In millions of dollars Recorded investment (1)(2) Unpaid Related specific allowance (3) Average carrying value (4) Mortgage and real estate Residential first mortgages $ 1,787 $ 1,962 $ 157 $ 1,661 Home equity loans 478 651 60 527 Credit cards 1,982 2,135 918 1,926 Personal, small business and other 552 552 210 463 Total $ 4,799 $ 5,300 $ 1,345 $ 4,577 (1) Recorded investment in a loan includes net deferred loan fees and costs, unamortized premium or discount and direct write-downs and includes accrued interest only on credit card loans. (2) For June 30, 2021, $202 million of residential first mortgages and $127 million of home equity loans do not have a specific allowance. For December 31, 2020, $211 million of residential first mortgages and $147 million of home equity loans do not have a specific allowance. (3) Included in the Allowance for credit losses on loans . (4) Average carrying value represents the average recorded investment ending balance for the last four quarters and does not include the related specific allowance. (5) Includes amounts recognized on both accrual and cash basis. Consumer Troubled Debt Restructurings (1) For the Three Months Ended June 30, 2021 In millions of dollars, except number of loans modified Number of Post- (2)(3) Deferred (4) Contingent (5) Principal (6) Average North America Residential first mortgages 326 $ 57 $ — $ — $ — — % Home equity loans 50 4 — — — — Credit cards 36,337 181 — — — 17 Personal, small business and other 225 3 — — — 3 Total (7) 36,938 $ 245 $ — $ — $ — International Residential first mortgages 530 $ 28 $ — $ — $ — 1 % Credit cards 18,297 94 — — 1 12 Personal, small business and other 6,780 57 — — 2 10 Total (7) 25,607 $ 179 $ — $ — $ 3 For the Three Months Ended June 30, 2020 In millions of dollars, except number of loans modified Number of Post- modification recorded investment (2)(8) Deferred principal (4) Contingent principal forgiveness (5) Principal forgiveness (6) Average North America Residential first mortgages 298 $ 51 $ — $ — $ — — % Home equity loans 83 8 — — — — Credit cards 50,891 220 — — — 17 Personal, small business and other 343 3 — — — 4 Total (7 ) 51,615 $ 282 $ — $ — $ — International Residential first mortgages 642 $ 44 $ — $ — $ — 4 % Credit cards 21,276 94 — — 3 16 Personal, small business and other 11,284 77 — — 2 10 Total (7) 33,202 $ 215 $ — $ — $ 5 (1) The above tables do not include loan modifications that meet the TDR relief criteria in the Coronavirus Aid, Relief, and Economic Security Act (CARES Act) or the interagency guidance. (2) Post-modification balances include past-due amounts that are capitalized at the modification date. (3) Post-modification balances in North America include $4 million of residential first mortgages and $0.3 million of home equity loans to borrowers who have gone through Chapter 7 bankruptcy in the three months ended June 30, 2021. These amounts include $1 million of residential first mortgages and $0.3 million of home equity loans that were newly classified as TDRs in the three months ended June 30, 2021, based on previously received OCC guidance. (4) Represents portion of contractual loan principal that is non-interest bearing, but still due from the borrower. Such deferred principal is charged off at the time of permanent modification to the extent that the related loan balance exceeds the underlying collateral value. (5) Represents portion of contractual loan principal that is non-interest bearing and, depending upon borrower performance, eligible for forgiveness. (6) Represents portion of contractual loan principal that was forgiven at the time of permanent modification. (7) The above tables reflect activity for restructured loans that were considered TDRs during the reporting period. (8) Post-modification balances in North America include $3 million of residential first mortgages and $1 million of home equity loans to borrowers who have gone through Chapter 7 bankruptcy in the three months ended June 30, 2020. These amounts include $2 million of residential first mortgages and $1 million of home equity loans that were newly classified as TDRs in the three months ended June 30, 2020, based on previously received OCC guidance. Consumer Troubled Debt Restructurings (1) For the Six Months Ended June 30, 2021 In millions of dollars, except number of loans modified Number of Post- (2)(3) Deferred (4) Contingent (5) Principal (6) Average North America Residential first mortgages 661 $ 115 $ — $ — $ — — % Home equity loans 107 8 — — — — Credit cards 95,383 481 — — — 17 Personal, small business and other 686 10 — — — 3 Total (7) 96,837 $ 614 $ — $ — $ — International Residential first mortgages 997 $ 52 $ — $ — $ — 1 % Credit cards 42,896 196 — — 9 14 Personal, small business and other 14,317 114 — — 4 10 Total (7) 58,210 $ 362 $ — $ — $ 13 For the Six Months Ended June 30, 2020 In millions of dollars, except number of loans modified Number of Post- modification recorded investment (2)(8) Deferred principal (4) Contingent principal forgiveness (5) Principal forgiveness (6) Average North America Residential first mortgages 575 $ 95 $ — $ — $ — — % Home equity loans 165 16 — — — 1 Credit cards 118,173 525 — — — 17 Personal, small business and other 776 7 — — — 3 Total (7 ) 119,689 $ 643 $ — $ — $ — International Residential first mortgages 1,178 $ 58 $ — $ — $ — 4 % Credit cards 40,591 167 — — 5 16 Personal, small business and other 18,938 128 — — 4 10 Total (7) 60,707 $ 353 $ — $ — $ 9 (1) The above tables do not include loan modifications that meet the TDR relief criteria in the Coronavirus Aid, Relief, and Economic Security Act (CARES Act) or the interagency guidance. (2) Post-modification balances include past-due amounts that are capitalized at the modification date. (3) Post-modification balances in North America include $7 million of residential first mortgages and $0.4 million of home equity loans to borrowers who have gone through Chapter 7 bankruptcy in the six months ended June 30, 2021. These amounts include $2 million of residential first mortgages and $0.3 million of home equity loans that were newly classified as TDRs in the six months ended June 30, 2021, based on previously received OCC guidance. (4) Represents portion of contractual loan principal that is non-interest bearing, but still due from the borrower. Such deferred principal is charged off at the time of permanent modification to the extent that the related loan balance exceeds the underlying collateral value. (5) Represents portion of contractual loan principal that is non-interest bearing and, depending on borrower performance, eligible for forgiveness. (6) Represents portion of contractual loan principal that was forgiven at the time of permanent modification. (7) The above tables reflect activity for restructured loans that were considered TDRs during the reporting period. (8) Post-modification balances in North America include $7 million of residential first mortgages and $2 million of home equity loans to borrowers who have gone through Chapter 7 bankruptcy in the six months ended June 30, 2020. These amounts include $5 million of residential first mortgages and $1 million of home equity loans that were newly classified as TDRs in the six months ended June 30, 2020, based on previously received OCC guidance. The following table presents consumer TDRs that defaulted for which the payment default occurred within one year of a permanent modification. Default is defined as 60 days past due. Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 North America Residential first mortgages $ 15 $ 21 $ 33 $ 35 Home equity loans 3 4 7 6 Credit cards 73 92 136 182 Personal, small business and other 1 1 2 3 Total $ 92 $ 118 $ 178 $ 226 International Residential first mortgages $ 10 $ 5 $ 22 $ 11 Credit cards 45 38 97 71 Personal, small business and other 37 18 58 35 Total $ 92 $ 61 $ 177 $ 117 Purchased Credit-Deteriorated Assets Three Months Ended June 30, 2021 Three Months Ended December 31, 2020 Three Months Ended June 30, In millions of dollars Credit Mortgages (1) Installment Credit Mortgages (1) Installment Credit Mortgages (1) Installment Purchase price $ — $ 10 $ — $ — $ 12 $ — $ — $ 3 $ — Allowance for credit losses at acquisition date — — — — — — — — — Discount or premium attributable to non-credit factors — — — — — — — — — Par value (amortized cost basis) $ — $ 10 $ — $ — $ 12 $ — $ — $ 3 $ — (1) Includes loans sold to agencies that were bought back at par due to repurchase agreements. Corporate Loans Corporate loans represent loans and leases managed by ICG . The following table presents information by corporate loan type: In millions of dollars June 30, December 31, In North America offices (1) Commercial and industrial $ 53,549 $ 57,731 Financial institutions 65,494 55,809 Mortgage and real estate (2) 62,162 60,675 Installment and other 26,757 26,744 Lease financing 547 673 Total $ 208,509 $ 201,632 In offices outside North America (1) Commercial and industrial $ 105,486 $ 104,072 Financial institutions 35,713 32,334 Mortgage and real estate (2) 10,995 11,371 Installment and other 35,787 33,759 Lease financing 54 65 Governments and official institutions 4,395 3,811 Total $ 192,430 $ 185,412 Corporate loans, net of unearned income (3) $ 400,939 $ 387,044 (1) North America includes the U.S., Canada and Puerto Rico. Mexico is included in offices outside North America. The classification between offices in North America and outside North America is based on the domicile of the booking unit. The difference between the domicile of the booking unit and the domicile of the managing unit is not material. (2) Loans secured primarily by real estate. (3) Corporate loans are net of unearned income of ($841) million and ($844) million at June 30, 2021 and December 31, 2020, respectively. Unearned income on corporate loans primarily represents interest received in advance, but not yet earned, on loans originated on a discounted basis. The Company sold and/or reclassified to held-for-sale $1.7 billion and $3.1 billion of corporate loans during the three and six months ended June 30, 2021, respectively, and $0.8 billion and $1.0 billion of corporate loans during the three and six months ended June 30, 2020, respectively. The Company did not have significant purchases of corporate loans classified as held-for-investment for the three and six months ended June 30, 2021 or 2020. Corporate Loan Delinquencies and Non-Accrual Details at June 30, 2021 In millions of dollars 30–89 days past due and accruing (1) ≥ 90 days past due and accruing (1) Total past due Total non-accrual (2) Total current (3) Total loans (4) Commercial and industrial $ 818 $ 121 $ 939 $ 1,878 $ 149,317 $ 152,134 Financial institutions 477 324 801 39 100,149 100,989 Mortgage and real estate 210 21 231 458 72,467 73,156 Lease financing 26 — 26 22 554 602 Other 71 237 308 179 65,878 66,365 Loans at fair value 7,693 Total $ 1,602 $ 703 $ 2,305 $ 2,576 $ 388,365 $ 400,939 Corporate Loan Delinquencies and Non-Accrual Details at December 31, 2020 In millions of dollars 30–89 days past due and accruing (1) ≥ 90 days past due and accruing (1) Total past due Total non-accrual (2) Total current (3) Total loans (4) Commercial and industrial $ 400 $ 109 $ 509 $ 2,795 $ 153,036 $ 156,340 Financial institutions 668 65 733 92 86,864 87,689 Mortgage and real estate 450 247 697 505 70,836 72,038 Lease financing 62 12 74 24 640 738 Other 112 19 131 111 63,157 63,399 Loans at fair value 6,840 Total $ 1,692 $ 452 $ 2,144 $ 3,527 $ 374,533 $ 387,044 (1) Corporate loans that are 90 days past due are generally classified as non-accrual. Corporate loans are considered past due when principal or interest is contractually due but unpaid. (2) Non-accrual loans generally include those loans that are 90 days or more past due or those loans for which Citi believes, based on actual experience and a forward-looking assessment of the collectability of the loan in full, that the payment of interest and/or principal is doubtful. (3) Loans less than 30 days past due are presented as current. (4) Total loans include loans at fair value, which are not included in the various delinquency columns. Corporate Loans Credit Quality Indicators Recorded investment in loans (1) Term loans by year of origination Revolving line of credit arrangements (2) June 30, In millions of dollars 2021 2020 2019 2018 2017 Prior Investment grade (3) Commercial and industrial (4) $ 37,302 $ 7,576 $ 5,592 $ 5,066 $ 3,302 $ 9,628 $ 28,121 $ 96,587 Financial institutions (4) 12,951 4,271 1,809 1,409 914 2,615 66,706 90,675 Mortgage and real estate 2,896 5,748 5,845 3,859 2,010 3,204 1,545 25,107 Other (5) 9,815 6,082 2,554 4,315 635 6,629 31,038 61,068 Total investment grade $ 62,964 $ 23,677 $ 15,800 $ 14,649 $ 6,861 $ 22,076 $ 127,410 $ 273,437 Non-investment grade (3) Accrual Commercial and industrial (4) $ 15,439 $ 4,660 $ 3,892 $ 3,334 $ 2,304 $ 4,020 $ 20,021 $ 53,670 Financial institutions (4) 5,008 936 546 334 101 273 3,076 10,274 Mortgage and real estate 1,302 1,314 2,133 1,633 1,045 1,304 672 9,403 Other (5) 1,127 456 644 516 312 647 1,995 5,697 Non-accrual Commercial and industrial (4) 40 182 201 83 108 172 1,091 1,877 Financial institutions — — — — — 11 29 40 Mortgage and real estate 2 13 5 85 10 62 280 457 Other (5) 90 19 5 20 28 20 20 202 Total non-investment grade $ 23,008 $ 7,580 $ 7,426 $ 6,005 $ 3,908 $ 6,509 $ 27,184 $ 81,620 Non-rated private bank loans managed on a delinquency basis (3)(6) $ 5,600 $ 9,537 $ 6,551 $ 3,210 $ 3,248 $ 10,043 $ — $ 38,189 Loans at fair value (7) 7,693 Corporate loans, net of unearned income $ 91,572 $ 40,794 $ 29,777 $ 23,864 $ 14,017 $ 38,628 $ 154,594 $ 400,939 Recorded investment in loans (1) Term loans by year of origination Revolving line of credit arrangements (2) December 31, 2020 In millions of dollars 2020 2019 2018 2017 2016 Prior Investment grade (3) Commercial and industrial (4) $ 38,398 $ 7,607 $ 5,929 $ 3,909 $ 2,094 $ 8,670 $ 25,819 $ 92,426 Financial institutions (4) 10,560 2,964 2,106 782 681 2,030 56,239 75,362 Mortgage and real estate 6,793 6,714 5,174 2,568 1,212 1,719 1,557 25,737 Other (5) 10,874 3,566 4,597 952 780 5,290 31,696 57,755 Total investment grade $ 66,625 $ 20,851 $ 17,806 $ 8,211 $ 4,767 $ 17,709 $ 115,311 $ 251,280 Non-investment grade (3) Accrual Commercial and industrial (4) $ 19,683 $ 4,794 $ 4,645 $ 2,883 $ 1,182 $ 4,533 $ 23,400 $ 61,120 Financial institutions (4) 7,413 700 654 274 141 197 2,855 12,234 Mortgage and real estate 1,882 1,919 2,058 1,457 697 837 551 9,401 Other (5) 1,407 918 725 370 186 657 1,986 6,249 Non-accrual Commercial and industrial (4) 260 203 192 143 57 223 1,717 2,795 Financial institutions 1 — — — — — 91 92 Mortgage and real estate 13 4 3 18 8 32 427 505 Other (5) 15 3 12 29 2 65 9 135 Total non-investment grade $ 30,674 $ 8,541 $ 8,289 $ 5,174 $ 2,273 $ 6,544 $ 31,036 $ 92,531 Non-rated private bank loans managed on a delinquency basis (3)(6) $ 9,823 $ 7,121 $ 3,533 $ 3,674 $ 4,300 $ 7,942 $ — $ 36,393 Loans at fair value (7) 6,840 Corporate loans, net of unearned income $ 107,122 $ 36,513 $ 29,628 $ 17,059 $ 11,340 $ 32,195 $ 146,347 $ 387,044 (1) Recorded investment in a loan includes net deferred loan fees and costs, unamortized premium or discount, less any direct write-downs. (2) There were no significant revolving line of credit arrangements that converted to term loans during the quarter. (3) Held-for-investment loans are accounted for on an amortized cost basis. (4) Includes certain short-term loans with less than one year in tenor. (5) Other includes installment and other, lease financing and loans to government and official institutions. (6) Non-rated private bank loans mainly include mortgage and real estate loans to private banking clients. (7) Loans at fair value include loans to commercial and industrial, financial institutions, mortgage and real estate and other. Non-Accrual Corporate Loans The following tables present non-accrual loan information by corporate loan type and interest income recognized on non-accrual corporate loans: June 30, 2021 Three Months Ended Six Months Ended In millions of dollars Recorded investment (1) Unpaid Related specific Average carrying value (2) Interest income recognized Interest income recognized (3) Non-accrual corporate loans Commercial and industrial $ 1,878 $ 2,453 $ 314 $ 2,481 $ 15 $ 25 Financial institutions 39 116 — 83 — — Mortgage and real estate 458 749 28 486 — — Lease financing 22 22 — 28 — — Other 179 251 3 121 — 6 Total non-accrual corporate loans $ 2,576 $ 3,591 $ 345 $ 3,199 $ 15 $ 31 December 31, 2020 In millions of dollars Recorded investment (1) Unpaid Related specific Average carrying value (2) Non-accrual corporate loans Commercial and industrial $ 2,795 $ 3,664 $ 442 $ 2,649 Financial institutions 92 181 17 132 Mortgage and real estate 505 803 38 413 Lease financing 24 24 — 34 Other 111 235 18 174 Total non-accrual corporate loans $ 3,527 $ 4,907 $ 515 $ 3,402 June 30, 2021 December 31, 2020 In millions of dollars Recorded investment (1) Related specific Recorded investment (1) Related specific Non-accrual corporate loans with specific allowances Commercial and industrial $ 1,568 $ 314 $ 1,523 $ 442 Financial institutions — — 90 17 Mortgage and real estate 142 28 246 38 Other 58 3 68 18 Total non-accrual corporate loans with specific allowances $ 1,768 $ 345 $ 1,927 $ 515 Non-accrual corporate loans without specific allowances Commercial and industrial $ 310 $ 1,272 Financial institutions 39 2 Mortgage and real estate 316 259 Lease financing 22 24 Other 121 43 Total non-accrual corporate loans without specific allowances $ 808 N/A $ 1,600 N/A (1) Recorded investment in a loan includes net deferred loan fees and costs, unamortized premium or discount, less any direct write-downs. (2) Average carrying value represents the average recorded investment balance and does not include related specific allowances. (3) Interest income recognized for the three and six months ended June 30, 2020 was $4 million and $19 million, respectively. N/A Not applicable Corporate Troubled Debt Restructurings (1) Three and Six Months Ended June 30, 2021 In millions of dollars Carrying value of TDRs modified during the period TDRs involving changes in the amount and/or timing of principal payments (2) TDRs involving changes in the amount and/or timing of interest payments (3) TDRs Three Months Ended June 30, 2021 Commercial and industrial $ 52 $ — $ — $ 52 Mortgage and real estate 5 — — 5 Other — — — — Total $ 57 $ — $ — $ 57 Six Months Ended June 30, 2021 Commercial and industrial $ 73 $ — $ — $ 73 Mortgage and real estate 6 — — 6 Other 1 1 — — Total $ 80 $ 1 $ — $ 79 Three and Six Months Ended June 30, 2020 In millions of dollars Carrying value of TDRs modified TDRs involving changes in the amount and/or timing of principal payments (2) TDRs involving changes in the amount and/or timing of interest payments (3) TDRs Three Months Ended June 30, 2020 Commercial and industrial $ 86 $ — $ — $ 86 Mortgage and real estate 4 — — 4 Other 4 4 — — Total $ 94 $ 4 $ — $ 90 Six Months Ended June 30, 2020 Commercial and industrial $ 148 $ — $ — $ 148 Mortgage and real estate 8 — — 8 Other 4 4 — — Total $ 160 $ 4 $ — $ 156 (1) The above tables do not include loan modifications that meet the TDR relief criteria in the CARES Act or the interagency guidance. (2) TDRs involving changes in the amount or timing of principal payments may involve principal forgiveness or deferral of periodic and/or final principal payments. Because forgiveness of principal is rare for corporate loans, modifications typically have little to no impact on the loans’ projected cash flows and thus little to no impact on the allowance established for the loans. Charge-offs for amounts deemed uncollectible may be recorded at the time of the restructuring or may have already been recorded in prior periods such that no charge-off is required at the time of the modification. (3) TDRs involving changes in the amount or timing of interest payments may involve a below-market interest rate. The following table presents total corporate loans modified in a TDR as well as those TDRs that defaulted and for which the payment default occurred within one year of a permanent modification. Default is defined as 60 days past due, except for classifiably managed commercial banking loans, where default is defined as 90 days past due. TDR loans that re-defaulted within one year of modification during the TDR loans that re-defaulted within one year of modification during the In millions of dollars TDR Three Months Ended Six Months Ended TDR Three Months Ended Six Months Ended Commercial and industrial $ 298 $ — $ — $ 406 $ — $ — Mortgage and real estate 80 — — 91 — — Other 38 — — 10 — — Total (1) $ 416 $ — $ — $ 507 $ — $ — (1) The above table reflects activity for loans outstanding that were considered TDRs as of the end of the reporting period.

ALLOWANCE FOR CREDIT LOSSES

ALLOWANCE FOR CREDIT LOSSES	6 Months Ended
	Jun. 30, 2021
Loans and Leases Receivable Disclosure [Abstract]
ALLOWANCE FOR CREDIT LOSSES	ALLOWANCE FOR CREDIT LOSSES Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Allowance for credit losses on loans (ACLL) at beginning of period $ 21,638 $ 20,380 $ 24,956 $ 12,783 Adjustments to opening balance: (1) Financial instruments—credit losses (CECL) (1) — — — 4,201 Variable post-charge-off third-party collection costs (1) — — — (443) Adjusted ACLL at beginning of period $ 21,638 $ 20,380 $ 24,956 $ 16,541 Gross credit losses on loans $ (1,844) $ (2,528) $ (4,052) $ (5,007) Gross recoveries on loans 524 367 984 787 Net credit losses on loans (NCLs) $ (1,320) $ (2,161) $ (3,068) $ (4,220) Replenishment of NCLs $ 1,320 $ 2,161 $ 3,068 $ 4,220 Net reserve builds (releases) for loans (2,184) 5,195 (5,252) 9,289 Net specific reserve builds (releases) for loans (262) 634 (421) 858 Total provision for credit losses on loans (PCLL) $ (1,126) $ 7,990 $ (2,605) $ 14,367 Initial allowance for credit losses on newly purchased credit-deteriorated assets during the period — — — 4 Other, net (see table below) 46 89 (45) (394) ACLL at end of period $ 19,238 $ 26,298 $ 19,238 $ 26,298 Allowance for credit losses on unfunded lending commitments (ACLUC) at beginning of period (2) $ 2,012 $ 1,813 $ 2,655 $ 1,456 Adjustment to opening balance for CECL adoption (1) — — — (194) Provision (release) for credit losses on unfunded lending commitments 44 113 (582) 670 Other, net 17 (67) — (73) ACLUC at end of period (2) $ 2,073 $ 1,859 $ 2,073 $ 1,859 Total allowance for credit losses on loans, leases and unfunded lending commitments $ 21,311 $ 28,157 $ 21,311 $ 28,157 Other, net details Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Sales or transfers of various consumer loan portfolios to HFS $ — $ (1) $ — $ (4) FX translation 62 88 (46) (395) Other (16) 2 1 5 Other, net $ 46 $ 89 $ (45) $ (394) (1) See Note 1 to the Consolidated Financial Statements in Citi’s 2020 Annual Report on Form 10-K for further discussion of the impact of Citi’s adoption of CECL and the change in accounting principle for collection costs. (2) Represents additional credit loss reserves for unfunded lending commitments and letters of credit recorded in Other liabilities on the Consolidated Balance Sheet. Allowance for Credit Losses on Loans and End-of-Period Loans Three Months Ended June 30, 2021 June 30, 2020 In millions of dollars Corporate Consumer Total Corporate Consumer Total ACLL at beginning of period $ 4,084 $ 17,554 $ 21,638 $ 3,451 $ 16,929 $ 20,380 Charge-offs (151) (1,693) (1,844) (347) (2,181) (2,528) Recoveries 62 462 524 23 344 367 Replenishment of NCLs 89 1,231 1,320 324 1,837 2,161 Net reserve builds (releases) (820) (1,364) (2,184) 2,883 2,312 5,195 Net specific reserve builds (releases) (130) (132) (262) 486 148 634 Initial allowance for credit losses on newly purchased credit-deteriorated assets during the period — — — — — — Other (7) 53 46 4 85 89 Ending balance $ 3,127 $ 16,111 $ 19,238 $ 6,824 $ 19,474 $ 26,298 Six Months Ended June 30, 2021 June 30, 2020 In millions of dollars Corporate Consumer Total Corporate Consumer Total ACLL at beginning of period $ 5,402 $ 19,554 $ 24,956 $ 2,886 $ 9,897 $ 12,783 Adjustments to opening balance: Financial instruments—credit losses (CECL adoption) — — — (721) 4,922 4,201 Variable post-charge-off third-party collection costs — — — — (443) (443) Charge-offs (354) (3,698) (4,052) (485) (4,522) (5,007) Recoveries 79 905 984 34 753 787 Replenishment of NCLs 275 2,793 3,068 451 3,769 4,220 Net reserve builds (releases) (2,093) (3,159) (5,252) 4,151 5,138 9,289 Net specific reserve builds (releases) (168) (253) (421) 534 324 858 Initial allowance for credit losses on newly purchased credit-deteriorated assets during the period — — — — 4 4 Other (14) (31) (45) (26) (368) (394) Ending balance $ 3,127 $ 16,111 $ 19,238 $ 6,824 $ 19,474 $ 26,298 (1) See “Accounting Changes” in Note 1 to the Consolidated Financial Statements for additional details. June 30, 2021 December 31, 2020 In millions of dollars Corporate Consumer Total Corporate Consumer Total ACLL Collectively evaluated $ 2,782 $ 15,028 $ 17,810 $ 4,887 $ 18,207 $ 23,094 Individually evaluated 345 1,084 1,429 515 1,345 1,860 Purchased credit deteriorated (1) — (1) (1) — 2 2 Total ACLL $ 3,127 $ 16,111 $ 19,238 $ 5,402 $ 19,554 $ 24,956 Loans, net of unearned income Collectively evaluated $ 390,670 $ 271,278 $ 661,948 $ 376,677 $ 283,885 $ 660,562 Individually evaluated 2,576 4,469 7,045 3,527 4,799 8,326 Purchased credit deteriorated — 134 134 — 141 141 Held at fair value 7,693 14 7,707 6,840 14 6,854 Total loans, net of unearned income $ 400,939 $ 275,895 $ 676,834 $ 387,044 $ 288,839 $ 675,883 (1) The negative allowance on purchased credit-deteriorated loans resulted from expected recoveries on previously written-off accounts. Allowance for Credit Losses on HTM Debt Securities Three Months Ended June 30, 2021 In millions of dollars Mortgage-backed State and municipal Foreign government Asset-backed Total HTM Allowance for credit losses on HTM debt securities at beginning $ 4 $ 69 $ 5 $ — $ 78 Gross credit losses — — — — — Gross recoveries — — — — — Net credit losses (NCLs) $ — $ — $ — $ — $ — Replenishment of NCLs $ — $ — $ — $ — $ — Net reserve builds (releases) 1 3 — — 4 Net specific reserve builds (releases) — — — — — Total provision for credit losses on HTM debt securities $ 1 $ 3 $ — $ — $ 4 Other, net $ — $ — $ — $ 1 $ 1 Initial allowance for credit losses on newly purchased credit-deteriorated securities during the period — — — — — Allowance for credit losses on HTM debt securities at end of quarter $ 5 $ 72 $ 5 $ 1 $ 83 Six Months Ended June 30, 2021 In millions of dollars Mortgage-backed State and municipal Foreign government Asset-backed Total HTM Allowance for credit losses on HTM debt securities at beginning $ 3 $ 74 $ 6 $ 3 $ 86 Gross credit losses — — — — — Gross recoveries 3 — — — 3 Net credit losses (NCLs) $ 3 $ — $ — $ — $ 3 Replenishment of NCLs $ (3) $ — $ — $ — $ (3) Net reserve builds (releases) 2 (2) (1) (3) (4) Net specific reserve builds (releases) — — — — — Total provision for credit losses on HTM debt securities $ (1) $ (2) $ (1) $ (3) $ (7) Other, net $ — $ — $ — $ 1 $ 1 Initial allowance for credit losses on newly purchased credit-deteriorated securities during the period — — — — — Allowance for credit losses on HTM debt securities at end of quarter $ 5 $ 72 $ 5 $ 1 $ 83 Allowance for Credit Losses on HTM Debt Securities Three Months Ended June 30, 2020 In millions of dollars State and municipal Foreign government Asset- Total HTM Allowance for credit losses on HTM debt securities at beginning of quarter $ 66 $ 4 $ 6 $ 76 Adjustment to opening balance for CECL adoption — — — — Gross credit losses — — — — Gross recoveries — — — — Net credit losses (NCLs) $ — $ — $ — $ — Replenishment of NCLs $ — $ — $ — $ — Net reserve builds (releases) 30 2 (1) 31 Net specific reserve builds (releases) — — — — Total provision for credit losses on HTM debt securities $ 30 $ 2 $ (1) $ 31 Other, net $ 3 $ — $ (3) $ — Initial allowance for credit losses on newly purchased credit-deteriorated securities during the period — — — — Allowance for credit losses on HTM debt securities at end of quarter $ 99 $ 6 $ 2 $ 107 Six Months Ended June 30, 2020 In millions of dollars State and municipal Foreign government Asset- Total HTM Allowance for credit losses on HTM debt securities at beginning of year $ — $ — $ — $ — Adjustment to opening balance for CECL adoption 61 4 5 70 Gross credit losses — — — — Gross recoveries — — — — Net credit losses (NCLs) $ — $ — $ — $ — Replenishment of NCLs $ — $ — $ — $ — Net reserve builds 35 2 — 37 Net specific reserve builds (releases) — — — — Total provision for credit losses on HTM debt securities $ 35 $ 2 $ — $ 37 Other, net $ 3 $ — $ (3) $ — Initial allowance for credit losses on newly purchased credit-deteriorated securities during the period — — — — Allowance for credit losses on HTM debt securities at end of quarter $ 99 $ 6 $ 2 $ 107 Allowance for Credit Losses on Other Assets Three Months Ended June 30, 2021 In millions of dollars Cash and due from banks Deposits with banks Securities borrowed and purchased under agreements Brokerage receivables All other assets (1) Total Allowance for credit losses on other assets at beginning of quarter $ — $ 28 $ 5 $ — $ 30 $ 63 Gross credit losses — — — — — — Gross recoveries — — — — — Net credit losses (NCLs) $ — $ — $ — $ — $ — $ — Replenishment of NCLs $ — $ — $ — $ — $ — $ — Net reserve builds (releases) — (4) 3 — (2) (3) Total provision for credit losses $ — $ (4) $ 3 $ — $ (2) $ (3) Other, net $ — $ — $ — $ — $ — $ — Allowance for credit losses on other assets at end of quarter $ — $ 24 $ 8 $ — $ 28 $ 60 Six Months Ended June 30, 2021 In millions of dollars Cash and due from banks Deposits with banks Securities borrowed and purchased under agreements Brokerage receivables All other assets (1) Total Allowance for credit losses on other assets at beginning of year $ — $ 20 $ 10 $ — $ 25 $ 55 Gross credit losses — — — — — — Gross recoveries — — — — — — Net credit losses (NCLs) $ — $ — $ — $ — $ — $ — Replenishment of NCLs $ — $ — $ — $ — $ — $ — Net reserve builds (releases) — 5 (2) — 3 6 Total provision for credit losses $ — $ 5 $ (2) $ — $ 3 $ 6 Other, net $ — $ (1) $ — $ — $ — $ (1) Allowance for credit losses on other assets at end of quarter $ — $ 24 $ 8 $ — $ 28 $ 60 (1) Primarily accounts receivable. Allowance for Credit Losses on Other Assets Three Months Ended June 30, 2020 In millions of dollars Cash and due from banks Deposits with banks Securities borrowed and purchased under agreements Brokerage receivables All other assets (1) Total Allowance for credit losses at beginning of quarter $ — $ 8 $ 5 $ — $ 41 $ 54 Adjustment to opening balance for CECL adoption — — — — — — Gross credit losses — — — — — — Gross recoveries — — — — — — Net credit losses (NCLs) $ — $ — $ — $ — $ — $ — Replenishment of NCLs $ — $ — $ — $ — $ — $ — Net reserve builds (releases) — 10 2 — 36 48 Total provision for credit losses $ — $ 10 $ 2 $ — $ 36 $ 48 Other, net $ — $ — $ — $ — $ — $ — Allowance for credit losses on other assets at end of quarter $ — $ 18 $ 7 $ — $ 77 $ 102 Six Months Ended June 30, 2020 In millions of dollars Cash and due from banks Deposits with banks Securities borrowed and purchased under agreements Brokerage receivables All other assets (1) Total Allowance for credit losses at beginning of year $ — $ — $ — $ — $ — $ — Adjustment to opening balance for CECL adoption 6 14 2 1 3 26 Gross credit losses — — — — — — Gross recoveries — — — — — — Net credit losses (NCLs) $ — $ — $ — $ — $ — $ — Replenishment of NCLs $ — $ — $ — $ — $ — $ — Net reserve builds (releases) (6) 4 5 (1) 42 44 Total provision for credit losses $ (6) $ 4 $ 5 $ (1) $ 42 $ 44 Other, net $ — $ — $ — $ — $ 32 $ 32 Allowance for credit losses on other assets at end of year $ — $ 18 $ 7 $ — $ 77 $ 102 (1) Primarily accounts receivable.

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS	6 Months Ended
	Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND INTANGIBLE ASSETS	GOODWILL AND INTANGIBLE ASSETS Goodwill The changes in Goodwill were as follows: In millions of dollars Global Consumer Banking Institutional Clients Group Total Balance at December 31, 2020 $ 12,142 $ 10,020 $ 22,162 Foreign currency translation (68) (189) (257) Balance at March 31, 2021 $ 12,074 $ 9,831 $ 21,905 Foreign currency translation 34 121 155 Balance at June 30, 2021 $ 12,108 $ 9,952 $ 22,060 Citi tests goodwill annually for impairment as of July 1 (the annual test) and through interim assessments between annual tests if an event occurs or circumstances change that could more-likely-than-not reduce the fair value of a reporting unit below its carrying amount. The results of the 2020 annual impairment test resulted in fair values as a percentage of carrying values between 115% and 136%. During the three and six months ended June 30, 2021, Citi qualitatively assessed the current environment, including the continuing impact of the COVID-19 pandemic, management’s announced strategy to pursue exits of its consumer franchises in 13 markets within Asia GCB , observed changes in market multiples and actual business performance, together with the latest available management forecasts. Based on the above, Citi determined it was not more-likely-than-not that the fair value of any reporting unit was below its book value and there was no indication of impairment as of June 30, 2021. While the inherent risk related to uncertainty is embedded in the key assumptions used in the valuations, the current environment continues to evolve. Deterioration in business performance or macroeconomic and market conditions, including potential adverse effects to economic forecasts due to the severity and duration of the pandemic, as well as the responses of governments, customers and clients, could negatively influence the assumptions used in the valuations, in particular, the discount and growth rates used in net income projections. If the future were to differ from management’s best estimate of key economic assumptions, and associated cash flows were to decrease, Citi could potentially experience material goodwill impairment charges in the future. For additional information regarding Citi’s goodwill impairment testing process, see Notes 1 and 16 to the Consolidated Financial Statements in Citi’s 2020 Annual Report on Form 10-K. Refer to Note 3 for a description of Citi’s Business Segments. Intangible Assets The components of intangible assets were as follows: June 30, 2021 December 31, 2020 In millions of dollars Gross Accumulated Net Gross Accumulated Net Purchased credit card relationships $ 5,615 $ 4,283 $ 1,332 $ 5,648 $ 4,229 $ 1,419 Credit card contract-related intangibles (1) 3,924 1,323 2,601 3,929 1,276 2,653 Core deposit intangibles 44 44 — 45 44 1 Other customer relationships 434 306 128 455 314 141 Present value of future profits 32 30 2 32 30 2 Indefinite-lived intangible assets 189 — 189 190 — 190 Other 76 60 16 72 67 5 Intangible assets (excluding MSRs) $ 10,314 $ 6,046 $ 4,268 $ 10,371 $ 5,960 $ 4,411 Mortgage servicing rights (MSRs) (2) 419 — 419 336 — 336 Total intangible assets $ 10,733 $ 6,046 $ 4,687 $ 10,707 $ 5,960 $ 4,747 (1) Primarily reflects contract-related intangibles associated with the American Airlines, The Home Depot, Costco and AT&T credit card program agreements, which represented 97% and 96% of the aggregate net carrying amount as of June 30, 2021 and December 31, 2020, respectively. (2) For additional information on Citi’s MSRs, see Note 18 to the Consolidated Financial Statements. The changes in intangible assets were as follows: In millions of dollars Net carrying amount at December 31, 2020 Acquisitions/renewals/ Amortization Impairments FX translation and other Net carrying amount at June 30, 2021 Purchased credit card relationships (1) $ 1,419 $ — $ (86) $ — $ (1) $ 1,332 Credit card contract-related intangibles (2) 2,653 19 (70) (1) — 2,601 Core deposit intangibles 1 — (1) — — — Other customer relationships 141 7 (12) — (8) 128 Present value of future profits 2 — — — — 2 Indefinite-lived intangible assets 190 — — — (1) 189 Other 5 23 (13) — 1 16 Intangible assets (excluding MSRs) $ 4,411 $ 49 $ (182) $ (1) $ (9) $ 4,268 Mortgage servicing rights (MSRs) (3) 336 419 Total intangible assets $ 4,747 $ 4,687 (1) Reflects intangibles for the value of cardholder relationships, which are discrete from partner contract-related intangibles, and include credit card accounts primarily in the Costco, Macy’s and Sears portfolios. (2) Primarily reflects contract-related intangibles associated with the American Airlines, The Home Depot, Costco and AT&T credit card program agreements, which represented 97% and 96% of the aggregate net carrying amount at June 30, 2021 and December 31, 2020, respectively. (3) For additional information on Citi’s MSRs, including the rollforward for the three and six months ended June 30, 2021, see Note 18 to the Consolidated Financial Statements.

DEBT

DEBT	6 Months Ended
	Jun. 30, 2021
Debt Disclosure [Abstract]
DEBT	DEBT For additional information regarding Citi’s short-term borrowings and long-term debt, see Note 17 to the Consolidated Financial Statements in Citi’s 2020 Annual Report on Form 10-K. Short-Term Borrowings In millions of dollars June 30, December 31, Commercial paper Bank (1) $ 8,974 $ 10,022 Broker-dealer and other (2) 9,692 7,988 Total commercial paper $ 18,666 $ 18,010 Other borrowings (3) 12,796 11,504 Total $ 31,462 $ 29,514 (1) Represents Citibank entities as well as other bank entities. (2) Represents broker-dealer and other non-bank subsidiaries that are consolidated into Citigroup Inc., the parent holding company. (3) Includes borrowings from Federal Home Loan Banks and other market participants. At June 30, 2021 and December 31, 2020, collateralized short-term advances from the Federal Home Loan Banks were $2.0 billion and $4.0 billion, respectively. Long-Term Debt In millions of dollars June 30, December 31, 2020 Citigroup Inc. (1) $ 174,366 $ 170,563 Bank (2) 28,661 44,742 Broker-dealer and other (3) 61,548 56,381 Total $ 264,575 $ 271,686 (1) Represents the parent holding company. (2) Represents Citibank entities as well as other bank entities. At June 30, 2021 and December 31, 2020, collateralized long-term advances from the Federal Home Loan Banks were $9.5 billion and $10.9 billion, respectively. (3) Represents broker-dealer and other non-bank subsidiaries that are consolidated into Citigroup Inc., the parent holding company. Certain Citigroup consolidated hedging activities are also included in this line. Long-term debt outstanding includes trust preferred securities with a balance sheet carrying value of $1.7 billion at both June 30, 2021 and December 31, 2020. The following table summarizes Citi’s outstanding trust preferred securities at June 30, 2021: Junior subordinated debentures owned by trust Trust Issuance Securities Liquidation value (1) Coupon rate (2) Common Amount Maturity Redeemable In millions of dollars, except securities and share amounts Citigroup Capital III Dec. 1996 194,053 $ 194 7.625 % 6,003 $ 200 Dec. 1, 2036 Not redeemable Citigroup Capital XIII Sept. 2010 89,840,000 2,246 3 mo. LIBOR + 637 bps 1,000 2,246 Oct. 30, 2040 Oct. 30, 2015 Citigroup Capital XVIII Jun. 2007 99,901 138 3 mo. sterling LIBOR + 88.75 bps 50 138 Jun. 28, 2067 Jun. 28, 2017 Total obligated $ 2,578 $ 2,584 Note: Distributions on the trust preferred securities and interest on the subordinated debentures are payable semiannually for Citigroup Capital III and Citigroup Capital XVIII and quarterly for Citigroup Capital XIII. (1) Represents the notional value received by outside investors from the trusts at the time of issuance. This differs from Citi’s balance sheet carrying value due primarily to unamortized discount and issuance costs.

CHANGES IN ACCUMULATED OTHER CO

CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI)	6 Months Ended
	Jun. 30, 2021
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI)	CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI) Changes in each component of Citigroup’s Accumulated other comprehensive income (loss) were as follows: Three and Six Months Ended June 30, 2021 In millions of dollars Net Debt valuation adjustment (DVA) (1) Cash flow hedges (2) Benefit plans (3) Foreign (4) Excluded component of fair value hedges Accumulated Three Months Ended June 30, 2021 Balance, March 31, 2021 $ 1,535 $ (1,461) $ 1,037 $ (6,150) $ (29,915) $ (57) $ (35,011) Other comprehensive income before (379) (72) 28 36 523 (11) 125 Increase (decrease) due to amounts reclassified from AOCI (95) 10 (201) 51 — 1 (234) Change, net of taxes $ (474) $ (62) $ (173) $ 87 $ 523 $ (10) $ (109) Balance at June 30, 2021 $ 1,061 $ (1,523) $ 864 $ (6,063) $ (29,392) $ (67) $ (35,120) Six Months Ended June 30, 2021 Balance, December 31, 2020 $ 3,320 $ (1,419) $ 1,593 $ (6,864) $ (28,641) $ (47) $ (32,058) Other comprehensive income before (1,898) (156) (316) 689 (751) (21) (2,453) Increase (decrease) due to amounts reclassified from AOCI (361) 52 (413) 112 — 1 (609) Change, net of taxes $ (2,259) $ (104) $ (729) $ 801 $ (751) $ (20) $ (3,062) Balance at June 30, 2021 $ 1,061 $ (1,523) $ 864 $ (6,063) $ (29,392) $ (67) $ (35,120) Footnotes to the table above appear on the following page. Three and Six Months Ended June 30, 2020 In millions of dollars Net Debt valuation adjustment (DVA) (1) Cash flow hedges (2) Benefit plans (3) Foreign of hedges (4) Excluded component of fair value hedges Accumulated Three Months Ended June 30, 2020 Balance, March 31, 2020 $ 2,863 $ 2,196 $ 2,020 $ (7,095) $ (32,500) $ (5) $ (32,521) Other comprehensive income before 1,391 (2,204) 226 (132) 561 13 (145) Increase (decrease) due to amounts reclassified from AOCI (554) (28) (152) 55 — — (679) Change, net of taxes $ 837 $ (2,232) $ 74 $ (77) $ 561 $ 13 $ (824) Balance at June 30, 2020 $ 3,700 $ (36) $ 2,094 $ (7,172) $ (31,939) $ 8 $ (33,345) Six Months Ended June 30, 2020 Balance, December 31, 2019 $ (265) $ (944) $ 123 $ (6,809) $ (28,391) $ (32) $ (36,318) Other comprehensive income before 4,795 913 2,124 (476) (3,548) 40 3,848 Increase (decrease) due to amounts reclassified from AOCI (830) (5) (153) 113 — — (875) Change, net of taxes $ 3,965 $ 908 $ 1,971 $ (363) $ (3,548) $ 40 $ 2,973 Balance at June 30, 2020 $ 3,700 $ (36) $ 2,094 $ (7,172) $ (31,939) $ 8 $ (33,345) (1) Reflects the after-tax valuation of Citi’s fair value options liabilities. See “Market Valuation Adjustments” in Note 20 to the Consolidated Financial Statements. (2) Primarily driven by Citigroup’s pay fixed/receive floating interest rate swap programs that hedge the floating rates on liabilities. (3) Primarily reflects adjustments based on the quarterly actuarial valuations of the Company’s significant pension and postretirement plans, annual actuarial valuations of all other plans and amortization of amounts previously recognized in other comprehensive income. (4) Primarily reflects the movements in (by order of impact) the Mexican peso, Brazilian real, Polish zloty, New Taiwan dollar, Euro and Indian rupee against the U.S. dollar and changes in related tax effects and hedges for the three months ended June 30, 2021. Primarily reflects the movements in (by order of impact) the South Korean won, Japanese yen, Euro, Indian rupee, Mexican peso and New Taiwan dollar against the U.S. dollar and changes in related tax effects and hedges for the six months ended June 30, 2021. Primarily reflects the movements in (by order of impact) the Australian dollar, South Korean won, Indonesian rupiah and Euro against the U.S. dollar and changes in related tax effects and hedges for the three months ended June 30, 2020. Primarily reflects the movements in (by order of impact) the Mexican peso, Brazilian real, Indian rupee and Chilean peso against the U.S. dollar and changes in related tax effects and hedges for the six months ended June 30, 2020. Amounts recorded in the CTA component of AOCI remain in AOCI until the sale or substantial liquidation of the foreign entity, at which point such amounts related to the foreign entity are reclassified into earnings. The pretax and after-tax changes in each component of Accumulated other comprehensive income (loss) were as follows: Three and Six Months Ended June 30, 2021 In millions of dollars Pretax Tax effect After-tax Three Months Ended June 30, 2021 Balance, March 31, 2021 $ (40,631) $ 5,620 $ (35,011) Change in net unrealized gains (losses) on debt securities (638) 164 (474) Debt valuation adjustment (DVA) (110) 48 (62) Cash flow hedges (224) 51 (173) Benefit plans 84 3 87 Foreign currency translation adjustment 445 78 523 Excluded component of fair value hedges (13) 3 (10) Change $ (456) $ 347 $ (109) Balance at June 30, 2021 $ (41,087) $ 5,967 $ (35,120) Six Months Ended June 30, 2021 Balance, December 31, 2020 $ (36,992) $ 4,934 $ (32,058) Change in net unrealized gains (losses) on debt securities (3,065) 806 (2,259) Debt valuation adjustment (DVA) (148) 44 (104) Cash flow hedges (953) 224 (729) Benefit plans 991 (190) 801 Foreign currency translation adjustment (894) 143 (751) Excluded component of fair value hedges (26) 6 (20) Change $ (4,095) $ 1,033 $ (3,062) Balance at June 30, 2021 $ (41,087) $ 5,967 $ (35,120) Three and Six Months Ended June 30, 2020 In millions of dollars Pretax Tax effect After-tax Three Months Ended June 30, 2020 Balance, March 31, 2020 $ (36,419) $ 3,898 $ (32,521) Change in net unrealized gains (losses) on debt securities 1,178 (341) 837 Debt valuation adjustment (DVA) (2,935) 703 (2,232) Cash flow hedges 90 (16) 74 Benefit plans (93) 16 (77) Foreign currency translation adjustment 485 76 561 Excluded component of fair value hedges 16 (3) 13 Change $ (1,259) $ 435 $ (824) Balance, June 30, 2020 $ (37,678) $ 4,333 $ (33,345) Six Months Ended June 30, 2020 Balance, December 31, 2019 $ (42,772) $ 6,454 $ (36,318) Change in net unrealized gains (losses) on debt securities 5,298 (1,333) 3,965 Debt valuation adjustment (DVA) 1,253 (345) 908 Cash flow hedges 2,574 (603) 1,971 Benefit plans (510) 147 (363) Foreign currency translation adjustment (3,570) 22 (3,548) Excluded component of fair value hedges 49 (9) 40 Change $ 5,094 $ (2,121) $ 2,973 Balance, June 30, 2020 $ (37,678) $ 4,333 $ (33,345) The Company recognized pretax gains (losses) related to amounts in AOCI reclassified to the Consolidated Statement of Income as follows: Increase (decrease) in AOCI due to Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Realized (gains) losses on sales of investments $ (137) $ (748) $ (538) $ (1,180) Gross impairment losses 9 19 78 71 Subtotal, pretax $ (128) $ (729) $ (460) $ (1,109) Tax effect 33 175 99 279 Net realized (gains) losses on investments after-tax (1) $ (95) $ (554) $ (361) $ (830) Realized DVA (gains) losses on fair value option liabilities, pretax $ 13 $ (37) $ 69 $ (6) Tax effect (3) 9 (17) 1 Net realized debt valuation adjustment, after-tax $ 10 $ (28) $ 52 $ (5) Interest rate contracts $ (266) $ (200) $ (544) $ (203) Foreign exchange contracts 1 1 2 2 Subtotal, pretax $ (265) $ (199) $ (542) $ (201) Tax effect 64 47 129 48 Amortization of cash flow hedges, after-tax (2) $ (201) $ (152) $ (413) $ (153) Amortization of unrecognized: Prior service cost (benefit) $ (6) $ (3) $ (12) $ (6) Net actuarial loss 71 75 158 154 Curtailment/settlement impact (3) 4 3 4 3 Subtotal, pretax $ 69 $ 75 $ 150 $ 151 Tax effect (18) (20) (38) (38) Amortization of benefit plans, after-tax (3) $ 51 $ 55 $ 112 $ 113 Excluded component of fair value hedges, pretax $ 1 $ 1 Tax effect — — — — Excluded component of fair value hedges, after-tax $ 1 $ — $ 1 $ — Foreign currency translation adjustment, pretax $ — $ — $ — $ — Tax effect — — — — Foreign currency translation adjustment, after-tax $ — $ — $ — $ — Total amounts reclassified out of AOCI , pretax $ (310) $ (890) $ (782) $ (1,165) Total tax effect 76 211 173 290 Total amounts reclassified out of AOCI , after-tax $ (234) $ (679) $ (609) $ (875) (1) The pretax amount is reclassified to Realized gains (losses) on sales of investments, net and Gross impairment losses in the Consolidated Statement of Income. See Note 12 to the Consolidated Financial Statements for additional details. (2) See Note 19 to the Consolidated Financial Statements for additional details. (3) See Note 8 to the Consolidated Financial Statements for additional details.

SECURITIZATIONS AND VARIABLE IN

SECURITIZATIONS AND VARIABLE INTEREST ENTITIES	6 Months Ended
	Jun. 30, 2021
Securitizations and Variable Interest Entities [Abstract]
SECURITIZATIONS AND VARIABLE INTEREST ENTITIES	SECURITIZATIONS AND VARIABLE INTEREST ENTITIES For additional information regarding Citi’s use of special purpose entities (SPEs) and variable interest entities (VIEs), see Note 21 to the Consolidated Financial Statements in Citi’s 2020 Annual Report on Form 10-K. Citigroup’s involvement with consolidated and unconsolidated VIEs with which the Company holds significant variable interests or has continuing involvement through servicing a majority of the assets in a VIE is presented below: As of June 30, 2021 Maximum exposure to loss in significant unconsolidated VIEs (1) Funded exposures (2) Unfunded exposures In millions of dollars Total Consolidated Significant unconsolidated VIE assets (3) Debt Equity Funding Guarantees Total Credit card securitizations $ 30,948 $ 30,948 $ — $ — $ — $ — $ — $ — Mortgage securitizations (4) U.S. agency-sponsored 114,664 — 114,664 1,533 — — 50 1,583 Non-agency-sponsored 57,157 773 56,384 2,893 — 5 — 2,898 Citi-administered asset-backed commercial paper conduits 14,566 14,566 — — — — — — Collateralized loan obligations (CLOs) 11,430 — 11,430 3,529 — — — 3,529 Asset-based financing (5) 256,827 8,657 248,170 29,196 1,195 10,255 — 40,646 Municipal securities tender option bond trusts (TOBs) 3,302 915 2,387 — — 1,523 — 1,523 Municipal investments 21,914 — 21,914 2,662 3,797 3,539 — 9,998 Client intermediation 911 470 441 75 — — 56 131 Investment funds 483 158 325 2 — 13 1 16 Other — — — — — — — — Total $ 512,202 $ 56,487 $ 455,715 $ 39,890 $ 4,992 $ 15,335 $ 107 $ 60,324 As of December 31, 2020 Maximum exposure to loss in significant unconsolidated VIEs (1) Funded exposures (2) Unfunded exposures In millions of dollars Total Consolidated Significant unconsolidated VIE assets (3) Debt Equity Funding Guarantees Total Credit card securitizations $ 32,420 $ 32,420 $ — $ — $ — $ — $ — $ — Mortgage securitizations (4) U.S. agency-sponsored 123,999 — 123,999 1,948 — — 61 2,009 Non-agency-sponsored 46,132 939 45,193 2,550 — 2 1 2,553 Citi-administered asset-backed commercial paper conduits 16,730 16,730 — — — — — — Collateralized loan obligations (CLOs) 18,332 — 18,332 4,273 — — — 4,273 Asset-based financing (5) 222,274 8,069 214,205 25,153 1,587 9,114 — 35,854 Municipal securities tender option bond trusts (TOBs) 3,349 835 2,514 — — 1,611 — 1,611 Municipal investments 20,335 — 20,335 2,569 4,056 3,041 — 9,666 Client intermediation 1,352 910 442 88 — — 56 144 Investment funds 488 153 335 — — 15 — 15 Other — — — — — — — — Total $ 485,411 $ 60,056 $ 425,355 $ 36,581 $ 5,643 $ 13,783 $ 118 $ 56,125 (1) The definition of maximum exposure to loss is included in the text that follows this table. (2) Included on Citigroup’s June 30, 2021 and December 31, 2020 Consolidated Balance Sheet. (3) A significant unconsolidated VIE is an entity in which the Company has any variable interest or continuing involvement considered to be significant, regardless of the likelihood of loss. (4) Citigroup mortgage securitizations also include agency and non-agency (private label) re-securitization activities. These SPEs are not consolidated. See “Re-securitizations” below for further discussion. (5) Included within this line are loans to third-party sponsored private equity funds, which represent $109 billion and $78 billion in unconsolidated VIE assets and $507 million and $425 million in maximum exposure to loss as of June 30, 2021 and December 31, 2020, respectively. The previous tables do not include: • certain venture capital investments made by some of the Company’s private equity subsidiaries, as the Company accounts for these investments in accordance with the Investment Company Audit Guide (codified in ASC 946); • certain investment funds for which the Company provides investment management services and personal estate trusts for which the Company provides administrative, trustee and/or investment management services; • certain third-party sponsored private equity funds to which the Company provides secured credit facilities. The Company has no decision-making power and does not consolidate these funds, some of which may meet the definition of a VIE. The Company’s maximum exposure to loss is generally limited to a loan or lending-related commitment. As of June 30, 2021 and December 31, 2020, the Company’s maximum exposure to loss related to these deals was $59.6 billion and $57.0 billion, respectively (for more information on these positions, see Note 13 to the Consolidated Financial Statements and Note 26 to the Consolidated Financial Statements in Citigroup’s 2020 Annual Report on Form 10-K); • certain VIEs structured by third parties in which the Company holds securities in inventory, as these investments are made on arm’s-length terms; • certain positions in mortgage- and asset-backed securities held by the Company, which are classified as Trading account assets or Investments , in which the Company has no other involvement with the related securitization entity deemed to be significant (for more information on these positions, see Notes 12 and 20 to the Consolidated Financial Statements); • certain representations and warranties exposures in legacy ICG -sponsored mortgage- and asset-backed securitizations in which the Company has no variable interest or continuing involvement as servicer. The outstanding balance of mortgage loans securitized during 2005 to 2008 in which the Company has no variable interest or continuing involvement as servicer was approximately $5.0 billion and $5.2 billion at June 30, 2021 and December 31, 2020, respectively; • certain representations and warranties exposures in Citigroup residential mortgage securitizations, in which the original mortgage loan balances are no longer outstanding; and • VIEs such as trust preferred securities trusts used in connection with the Company’s funding activities. The Company does not have a variable interest in these trusts. The asset balances for consolidated VIEs represent the carrying amounts of the assets consolidated by the Company. The carrying amount may represent the amortized cost or the current fair value of the assets depending on the classification of the asset (e.g., loan or security) and the associated accounting model ascribed to that classification. The asset balances for unconsolidated VIEs in which the Company has significant involvement represent the most current information available to the Company. In most cases, the asset balances represent an amortized cost basis without regard to impairments, unless fair value information is readily available to the Company. The maximum funded exposure represents the balance sheet carrying amount of the Company’s investment in the VIE. It reflects the initial amount of cash invested in the VIE, adjusted for any accrued interest and cash principal payments received. The carrying amount may also be adjusted for increases or declines in fair value or any impairment in value recognized in earnings. The maximum exposure of unfunded positions represents the remaining undrawn committed amount, including liquidity and credit facilities provided by the Company or the notional amount of a derivative instrument considered to be a variable interest. In certain transactions, the Company has entered into derivative instruments or other arrangements that are not considered variable interests in the VIE (e.g., interest rate swaps, cross-currency swaps or where the Company is the purchaser of credit protection under a credit default swap or total return swap where the Company pays the total return on certain assets to the SPE). Receivables under such arrangements are not included in the maximum exposure amounts. Funding Commitments for Significant Unconsolidated VIEs—Liquidity Facilities and Loan Commitments The following table presents the notional amount of liquidity facilities and loan commitments that are classified as funding commitments in the VIE tables above: June 30, 2021 December 31, 2020 In millions of dollars Liquidity Loan/equity Liquidity Loan/equity Non-agency-sponsored mortgage securitizations $ — $ 5 $ — $ 2 Asset-based financing — 10,255 — 9,114 Municipal securities tender option bond trusts (TOBs) 1,523 — 1,611 — Municipal investments — 3,539 — 3,041 Investment funds — 13 — 15 Other — — — — Total funding commitments $ 1,523 $ 13,812 $ 1,611 $ 12,172 Significant Interests in Unconsolidated VIEs—Balance Sheet Classification The following table presents the carrying amounts and classification of significant variable interests in unconsolidated VIEs: In billions of dollars June 30, 2021 December 31, 2020 Cash $ — $ — Trading account assets 1.4 2.0 Investments 9.6 10.6 Total loans, net of allowance 33.2 29.3 Other 0.7 0.3 Total assets $ 44.9 $ 42.2 Credit Card Securitizations Substantially all of the Company’s credit card securitization activity is through two trusts—Citibank Credit Card Master Trust (Master Trust) and Citibank Omni Master Trust (Omni Trust), with the substantial majority through the Master Trust. These trusts are consolidated entities. The following table reflects amounts related to the Company’s securitized credit card receivables: In billions of dollars June 30, 2021 December 31, 2020 Ownership interests in principal amount of trust credit card receivables Sold to investors via trust-issued securities $ 11.0 $ 15.7 Retained by Citigroup as trust-issued securities 7.2 7.9 Retained by Citigroup via non-certificated interests 14.6 11.1 Total $ 32.8 $ 34.7 The following tables summarize selected cash flow information related to Citigroup’s credit card securitizations: Three Months Ended June 30, In billions of dollars 2021 2020 Proceeds from new securitizations $ — $ — Pay down of maturing notes (1.1) (3.2) Six Months Ended In billions of dollars 2021 2020 Proceeds from new securitizations $ — $ — Pay down of maturing notes (4.7) (3.2) Master Trust Liabilities (at Par Value) The weighted average maturity of the third-party term notes issued by the Master Trust was 3.6 years as of June 30, 2021 and 2.9 years as of December 31, 2020. In billions of dollars Jun. 30, 2021 Dec. 31, 2020 Term notes issued to third parties $ 9.7 $ 13.9 Term notes retained by Citigroup affiliates 2.2 2.7 Total Master Trust liabilities $ 11.9 $ 16.6 Omni Trust Liabilities (at Par Value) The weighted average maturity of the third-party term notes issued by the Omni Trust was 1.8 years as of June 30, 2021 and 1.1 years as of December 31, 2020. In billions of dollars Jun. 30, 2021 Dec. 31, 2020 Term notes issued to third parties $ 1.3 $ 1.8 Term notes retained by Citigroup affiliates 5.0 5.2 Total Omni Trust liabilities $ 6.3 $ 7.0 Mortgage Securitizations The following tables summarize selected cash flow information and retained interests related to Citigroup mortgage securitizations: Three Months Ended June 30, 2021 2020 In billions of dollars U.S. agency- Non-agency- U.S. agency- Non-agency- Principal securitized $ 1.9 $ 7.1 $ 2.4 $ 0.9 Proceeds from new securitizations 1.9 7.2 2.6 0.9 Purchases of previously transferred financial assets — — — — Six Months Ended June 30, 2021 2020 In billions of dollars U.S. agency- Non-agency- U.S. agency- Non-agency- Principal securitized $ 4.9 $ 18.1 $ 4.5 $ 1.6 Proceeds from new securitizations 5.1 17.8 4.7 3.4 Purchases of previously transferred financial assets 0.1 — 0.1 — Note: Excludes re-securitization transactions. Gains recognized on the securitization of U.S. agency-sponsored mortgages were $0.2 million and $1.3 million for the three and six months ended June 30, 2021, respectively. For the three and six months ended June 30, 2021, gains recognized on the securitization of non-agency sponsored mortgages were $135.6 million and $301.7 million, respectively. Gains recognized on the securitization of U.S. agency-sponsored mortgages were $2 million and $4 million for the three and six months ended June 30, 2020. Gains recognized on the securitization of non-agency sponsored mortgages were $27 million and $65 million for the three and six months ended June 30, 2020, respectively. June 30, 2021 December 31, 2020 Non-agency-sponsored mortgages (1) Non-agency-sponsored mortgages (1) In millions of dollars U.S. agency- Senior (2) Subordinated U.S. agency- Senior Subordinated Carrying value of retained interests (3) $ 388 $ 2,393 $ 479 $ 315 $ 1,210 $ 145 (1) Disclosure of non-agency-sponsored mortgages as senior and subordinated interests is indicative of the interests’ position in the capital structure of the securitization. (2) Senior interests in non-agency-sponsored mortgages include $93 million related to personal loan securitizations at June 30, 2021. (3) Retained interests consist of Level 2 and Level 3 assets depending on the observability of significant inputs. See Note 20 to the Consolidated Financial Statements for more information about fair value measurements. Key assumptions used in measuring the fair value of retained interests at the date of sale or securitization of mortgage receivables were as follows: Three Months Ended June 30, 2021 Non-agency-sponsored mortgages (1) U.S. agency- sponsored mortgages Senior interests Subordinated interests Weighted average discount rate 9.0 % 1.8 % 2.8 % Weighted average constant prepayment rate 4.2 % — % 10.0 % Weighted average anticipated net credit losses (2) NM — % 1.0 % Weighted average life 7.8 years 6.7 years 5.7 years Three Months Ended June 30, 2020 Non-agency-sponsored mortgages (1) U.S. agency- Senior Subordinated Weighted average discount rate 3.5 % 6.2 % 3.0 % Weighted average constant prepayment rate 28.7 % — % 25.0 % Weighted average anticipated net credit losses (2) NM — % 0.5 % Weighted average life 4.1 years 9.8 years 2.3 years Six Months Ended June 30, 2021 Non-agency-sponsored mortgages (1) U.S. agency- sponsored mortgages Senior interests Subordinated interests Weighted average discount rate 8.9 % 0.4 % 2.9 % Weighted average constant prepayment rate 5.0 % — % 10.3 % Weighted average anticipated net credit losses (2) NM 0.4 % 1.1 % Weighted average life 7.8 years 3.4 years 5.5 years Six Months Ended June 30, 2020 Non-agency-sponsored mortgages (1) U.S. agency- Senior Subordinated Weighted average discount rate 6.0 % 1.8 % 3.0 % Weighted average constant prepayment rate 27.1 % — % 25.0 % Weighted average anticipated net credit losses (2) NM 1.6 % 0.5 % Weighted average life 4.7 years 4.8 years 2.3 years (1) Disclosure of non-agency-sponsored mortgages as senior and subordinated interests is indicative of the interests’ position in the capital structure of the securitization. (2) Anticipated net credit losses represent estimated loss severity associated with defaulted mortgage loans underlying the mortgage securitizations disclosed above. Anticipated net credit losses, in this instance, do not represent total credit losses incurred to date, nor do they represent credit losses expected on retained interests in mortgage securitizations. NM Anticipated net credit losses are not meaningful due to U.S. agency guarantees. The interests retained by the Company range from highly rated and/or senior in the capital structure to unrated and/or residual interests. Key assumptions used in measuring the fair value of retained interests in securitizations of mortgage receivables at period end were as follows: June 30, 2021 Non-agency-sponsored mortgages (1) U.S. agency- Senior Subordinated Weighted average discount rate 6.4 % 7.9 % 3.0 % Weighted average constant prepayment rate 12.5 % 4.5 % 4.6 % Weighted average anticipated net credit losses (2) NM 1.0 % 1.2 % Weighted average life 5.5 years 4.7 years 18.2 years December 31, 2020 Non-agency-sponsored mortgages (1) U.S. agency- Senior Subordinated Weighted average discount rate 5.9 % 7.2 % 4.3 % Weighted average constant prepayment rate 22.7 % 5.3 % 4.7 % Weighted average anticipated net credit losses (2) NM 1.2 % 1.4 % Weighted average life 4.5 years 5.3 years 4.7 years (1) Disclosure of non-agency-sponsored mortgages as senior and subordinated interests is indicative of the interests’ position in the capital structure of the securitization. (2) Anticipated net credit losses represent estimated loss severity associated with defaulted mortgage loans underlying the mortgage securitizations disclosed above. Anticipated net credit losses, in this instance, do not represent total credit losses incurred to date, nor do they represent credit losses expected on retained interests in mortgage securitizations. NM Anticipated net credit losses are not meaningful due to U.S. agency guarantees. The sensitivity of the fair value to adverse changes of 10% and 20% in each of the key assumptions is presented in the tables below. The negative effect of each change is calculated independently, holding all other assumptions constant. Because the key assumptions may not be independent, the net effect of simultaneous adverse changes in the key assumptions may be less than the sum of the individual effects shown below. June 30, 2021 Non-agency-sponsored mortgages In millions of dollars U.S. agency- sponsored mortgages Senior interests Subordinated interests Discount rate Adverse change of 10% $ (9) $ — $ (1) Adverse change of 20% (18) — (2) Constant prepayment rate Adverse change of 10% (20) — — Adverse change of 20% (38) — — Anticipated net credit losses Adverse change of 10% NM — — Adverse change of 20% NM — — December 31, 2020 Non-agency-sponsored mortgages In millions of dollars U.S. agency- Senior Subordinated Discount rate Adverse change of 10% $ (8) $ — $ (1) Adverse change of 20% (15) (1) (1) Constant prepayment rate Adverse change of 10% (21) — — Adverse change of 20% (40) — — Anticipated net credit losses Adverse change of 10% NM — — Adverse change of 20% NM — — NM Anticipated net credit losses are not meaningful due to U.S. agency guarantees. The following table includes information about loan delinquencies and liquidation losses for assets held in non-consolidated, non-agency-sponsored securitization entities: Liquidation losses Securitized assets 90 days past due Three Months Ended June 30, Six Months Ended June 30, In billions of dollars, except liquidation losses in millions Jun. 30, 2021 Dec. 31, 2020 Jun. 30, 2021 Dec. 31, 2020 2021 2020 2021 2020 Securitized assets Residential mortgages (1) $ 28.7 $ 16.9 $ 0.4 $ 0.5 $ 5 $ 7 $ 6.6 $ 18 Commercial and other 25.8 23.9 — — — — — — Total $ 54.5 $ 40.8 $ 0.4 $ 0.5 $ 5 $ 7 $ 6.6 $ 18 (1) Securitized assets include $0.2 billion of personal loan securitizations as of June 30, 2021. Mortgage Servicing Rights (MSRs) The fair value of Citi’s capitalized MSRs was $419 million and $345 million at June 30, 2021 and 2020, respectively. The MSRs correspond to principal loan balances of $50 billion and $57 billion as of June 30, 2021 and 2020, respectively. The following table summarizes the changes in capitalized MSRs: Three Months Ended June 30, Six Months Ended In millions of dollars 2021 2020 2021 2020 Balance, beginning of period $ 433 $ 367 $ 336 $ 495 Originations 25 24 68 56 Changes in fair value of MSRs due to changes in inputs and assumptions (21) (26) 52 (169) Other changes (1) (18) (20) (37) (37) Sales of MSRs — — — — Balance, as of June 30 $ 419 $ 345 $ 419 $ 345 (1) Represents changes due to customer payments and passage of time. The fair value of the MSRs is primarily affected by changes in prepayments of mortgages that result from shifts in mortgage interest rates. Specifically, higher interest rates tend to lead to declining prepayments, which causes the fair value of the MSRs to increase. In managing this risk, Citigroup economically hedges a significant portion of the value of its MSRs through the use of interest rate derivative contracts, forward purchase and sale commitments of mortgage-backed securities and purchased securities, all classified as Trading account assets . The Company receives fees during the course of servicing previously securitized mortgages. The amounts of these fees were as follows: Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Servicing fees $ 37 $ 34 $ 68 $ 73 Late fees — 1 1 3 Ancillary fees — — — — Total MSR fees $ 37 $ 35 $ 69 $ 76 In the Consolidated Statement of Income these fees are primarily classified as Commissions and fees , and changes in MSR fair values are classified as Other revenue . Re-securitizations The Company engages in re-securitization transactions in which debt securities are transferred to a VIE in exchange for new beneficial interests. Citi did not transfer non-agency (private label) securities to re-securitization entities during the three months ended June 30, 2021 and 2020. These securities are backed by either residential or commercial mortgages and are often structured on behalf of clients. As of June 30, 2021 and December 31, 2020, Citi held no retained interests in private label re-securitization transactions structured by Citi. The Company also re-securitizes U.S. government-agency-guaranteed mortgage-backed (agency) securities. During the three and six months ended June 30, 2021, Citi transferred agency securities with a fair value of approximately $11.4 billion and $24.5 billion, respectively, to re-securitization entities compared to approximately $12 billion and $19.4 billion for the three and six months ended June 30, 2020, respectively. As of June 30, 2021, the fair value of Citi-retained interests in agency re-securitization transactions structured by Citi totaled approximately $1.2 billion (including $410 million related to re-securitization transactions executed in 2021) compared to $1.6 billion as of December 31, 2020 (including $916 million related to re-securitization transactions executed in 2020), which is recorded in Trading account assets . The original fair values of agency re-securitization transactions in which Citi holds a retained interest as of June 30, 2021 and December 31, 2020 were approximately $76 billion and $83.6 billion, respectively. As of June 30, 2021 and December 31, 2020, the Company did not consolidate any private label or agency re-securitization entities. Citi-Administered Asset-Backed Commercial Paper Conduits At June 30, 2021 and December 31, 2020, the commercial paper conduits administered by Citi had approximately $14.6 billion and $16.7 billion of purchased assets outstanding, respectively, and had incremental funding commitments with clients of approximately $20 billion and $17.1 billion, respectively. Substantially all of the funding of the conduits is in the form of short-term commercial paper. At June 30, 2021 and December 31, 2020, the weighted average remaining lives of the commercial paper issued by the conduits were approximately 52 and 54 days, respectively. The primary credit enhancement provided to the conduit investors is in the form of transaction-specific credit enhancements described above. Each asset purchased by the conduit is structured with transaction-specific credit enhancement features provided by the third-party client seller, including over-collateralization, cash and excess spread collateral accounts, direct recourse or third-party guarantees. These credit enhancements are sized with the objective of approximating a credit rating of A or above, based on Citi’s internal risk ratings. In addition to the transaction-specific credit enhancements, the conduits, other than the government-guaranteed loan conduit, have obtained letters of credit from the Company, which equal at least 8% to 10% of the conduit’s assets with a minimum of $200 million. The letters of credit provided by the Company to the conduits total approximately $1.3 billion and $1.5 billion as of June 30, 2021 and December 31, 2020, respectively. The net result across multi-seller conduits administered by the Company is that, in the event that defaulted assets exceed the transaction-specific credit enhancements described above, any losses in each conduit are allocated first to the Company and then to the commercial paper investors. At June 30, 2021 and December 31, 2020, the Company owned $5.6 billion and $6.6 billion, respectively, of the commercial paper issued by its administered conduits. The Company’s investments were not driven by market illiquidity and the Company is not obligated under any agreement to purchase the commercial paper issued by the conduits. Collateralized Loan Obligations (CLOs) There were no new securitizations during the three months ended June 30, 2021 and 2020. The following table summarizes selected retained interests related to Citigroup CLOs: In millions of dollars Jun. 30, 2021 Dec. 31, 2020 Carrying value of retained interests $ 1,574 $ 1,611 All of Citi’s retained interests were held-to-maturity securities as of June 30, 2021 and December 31, 2020. Asset-Based Financing The primary types of Citi’s asset-based financings, total assets of the unconsolidated VIEs with significant involvement and Citi’s maximum exposure to loss are shown below. For Citi to realize the maximum loss, the VIE (borrower) would have to default with no recovery from the assets held by the VIE. June 30, 2021 In millions of dollars Total unconsolidated VIE assets Maximum exposure to unconsolidated VIEs Type Commercial and other $ 33,341 $ 7,073 Corporate loans 15,963 10,588 Other (including investment funds, airlines and shipping) 198,866 22,985 Total $ 248,170 $ 40,646 December 31, 2020 In millions of dollars Total unconsolidated VIE assets Maximum exposure to unconsolidated VIEs Type Commercial and other $ 34,570 $ 7,758 Corporate loans 12,022 7,654 Other (including investment funds, airlines and shipping) 167,613 20,442 Total $ 214,205 $ 35,854 Municipal Securities Tender Option Bond (TOB) Trusts At June 30, 2021 and December 31, 2020, none of the municipal bonds owned by non-customer TOB trusts were subject to a credit guarantee provided by the Company. At June 30, 2021 and December 31, 2020, liquidity agreements provided with respect to customer TOB trusts totaled $1.5 billion and $1.6 billion, respectively, of which $0.7 billion and $0.8 billion, respectively, were offset by reimbursement agreements. For the remaining exposure related to TOB transactions, where the residual owned by the customer was at least 25% of the bond value at the inception of the transaction, no reimbursement agreement was executed. The Company also provides other liquidity agreements or letters of credit to customer-sponsored municipal investment funds, which are not variable interest entities, and municipality-related issuers that totaled $2.5 billion and $3.6 billion as of June 30, 2021 and December 31, 2020, respectively. These liquidity agreements and letters of credit are offset by reimbursement agreements with various term-out provisions.

DERIVATIVES

DERIVATIVES	6 Months Ended
	Jun. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVES	DERIVATIVES In the ordinary course of business, Citigroup enters into various types of derivative transactions. All derivatives are recorded in Trading account assets/Trading account liabilities on the Consolidated Balance Sheet. For additional information regarding Citi’s use of and accounting for derivatives, see Note 22 to the Consolidated Financial Statements in Citi’s 2020 Annual Report on Form 10-K. Information pertaining to Citigroup’s derivatives activities, based on notional amounts, is presented in the table below. Derivative notional amounts are reference amounts from which contractual payments are derived and do not represent a complete measure of Citi’s exposure to derivative transactions. Citi’s derivative exposure arises primarily from market fluctuations (i.e., market risk), counterparty failure (i.e., credit risk) and/or periods of high volatility or financial stress (i.e., liquidity risk), as well as any market valuation adjustments that may be required on the transactions. Moreover, notional amounts do not reflect the netting of offsetting trades. For example, if Citi enters into a receive-fixed interest rate swap with $100 million notional, and offsets this risk with an identical but opposite pay-fixed position with a different counterparty, $200 million in derivative notionals is reported, although these offsetting positions may result in de minimis overall market risk. In addition, aggregate derivative notional amounts can fluctuate from period to period in the normal course of business based on Citi’s market share, levels of client activity and other factors. Derivative Notionals Hedging instruments under Trading derivative instruments In millions of dollars June 30, December 31, June 30, December 31, Interest rate contracts Swaps $ 295,160 $ 334,351 $ 19,629,538 $ 17,724,147 Futures and forwards — — 4,381,531 4,142,514 Written options — — 1,598,478 1,573,483 Purchased options — — 1,472,341 1,418,255 Total interest rate contracts $ 295,160 $ 334,351 $ 27,081,888 $ 24,858,399 Foreign exchange contracts Swaps $ 55,575 $ 65,709 $ 6,495,324 $ 6,567,304 Futures, forwards and spot 42,510 37,080 4,586,090 3,945,391 Written options 24 47 796,584 907,338 Purchased options 26 53 790,172 900,626 Total foreign exchange contracts $ 98,135 $ 102,889 $ 12,668,170 $ 12,320,659 Equity contracts Swaps $ — $ — $ 306,856 $ 274,098 Futures and forwards — — 82,175 67,025 Written options — — 525,671 441,003 Purchased options — — 436,045 328,202 Total equity contracts $ — $ — $ 1,350,747 $ 1,110,328 Commodity and other contracts Swaps $ — $ — $ 90,785 $ 80,127 Futures and forwards 1,929 924 168,072 143,175 Written options — — 68,024 71,376 Purchased options — — 64,810 67,849 Total commodity and other contracts $ 1,929 $ 924 $ 391,691 $ 362,527 Credit derivatives (1) Protection sold $ — $ — $ 563,906 $ 543,607 Protection purchased — — 632,441 612,770 Total credit derivatives $ — $ — $ 1,196,347 $ 1,156,377 Total derivative notionals $ 395,224 $ 438,164 $ 42,688,843 $ 39,808,290 (1) Credit derivatives are arrangements designed to allow one party (protection purchaser) to transfer the credit risk of a “reference asset” to another party (protection seller). These arrangements allow a protection seller to assume the credit risk associated with the reference asset without directly purchasing that asset. The Company enters into credit derivative positions for purposes such as risk management, yield enhancement, reduction of credit concentrations and diversification of overall risk. The following tables present the gross and net fair values of the Company’s derivative transactions and the related offsetting amounts as of June 30, 2021 and December 31, 2020. Gross positive fair values are offset against gross negative fair values by counterparty, pursuant to enforceable master netting agreements. Under ASC 815-10-45, payables and receivables in respect of cash collateral received from or paid to a given counterparty pursuant to a credit support annex are included in the offsetting amount if a legal opinion supporting the enforceability of netting and collateral rights has been obtained. GAAP does not permit similar offsetting for security collateral. In addition, the following tables reflect rule changes adopted by clearing organizations that require or allow entities to treat certain derivative assets, liabilities and the related variation margin as settlement of the related derivative fair values for legal and accounting purposes, as opposed to presenting gross derivative assets and liabilities that are subject to collateral, whereby the counterparties would also record a related collateral payable or receivable. As a result, the tables reflect a reduction of approximately $275 billion and $280 billion as of June 30, 2021 and December 31, 2020, respectively, of derivative assets and derivative liabilities that previously would have been reported on a gross basis, but are now legally settled and not subject to collateral. The tables also present amounts that are not permitted to be offset, such as security collateral or cash collateral posted at third-party custodians, but which would be eligible for offsetting to the extent that an event of default has occurred and a legal opinion supporting enforceability of the netting and collateral rights has been obtained. Derivative Mark-to-Market (MTM) Receivables/Payables In millions of dollars at June 30, 2021 Derivatives classified in (1)(2) Derivatives instruments designated as ASC 815 hedges Assets Liabilities Over-the-counter $ 1,331 $ 38 Cleared 88 148 Interest rate contracts $ 1,419 $ 186 Over-the-counter $ 879 $ 1,342 Cleared — 3 Foreign exchange contracts $ 879 $ 1,345 Total derivatives instruments designated as ASC 815 hedges $ 2,298 $ 1,531 Derivatives instruments not designated as ASC 815 hedges Over-the-counter $ 172,044 $ 157,764 Cleared 12,425 10,770 Exchange traded 89 21 Interest rate contracts $ 184,558 $ 168,555 Over-the-counter $ 117,330 $ 115,100 Cleared 362 290 Foreign exchange contracts $ 117,692 $ 115,390 Over-the-counter $ 28,687 $ 40,156 Cleared — 1 Exchange traded 19,828 19,770 Equity contracts $ 48,515 $ 59,927 Over-the-counter $ 23,419 $ 25,917 Exchange traded 1,778 2,269 Commodity and other contracts $ 25,197 $ 28,186 Over-the-counter $ 7,108 $ 7,206 Cleared 2,744 3,271 Credit derivatives $ 9,852 $ 10,477 Total derivatives instruments not designated as ASC 815 hedges $ 385,814 $ 382,535 Total derivatives $ 388,112 $ 384,066 Cash collateral paid/received (3) $ 22,104 $ 17,965 Less: Netting agreements (4) (293,047) (293,047) Less: Netting cash collateral received/paid (5) (43,554) (48,079) Net receivables/payables included on the Consolidated Balance Sheet (6) $ 73,615 $ 60,905 Additional amounts subject to an enforceable master netting agreement, but not offset on the Consolidated Balance Sheet Less: Cash collateral received/paid $ (982) $ (1,586) Less: Non-cash collateral received/paid (6,800) (13,639) Total net receivables/payables (6) $ 65,833 $ 45,680 (1) The derivatives fair values are also presented in Note 20 to the Consolidated Financial Statements. (2) Over-the-counter (OTC) derivatives are derivatives executed and settled bilaterally with counterparties without the use of an organized exchange or central clearing house. Cleared derivatives include derivatives executed bilaterally with a counterparty in the OTC market, but then novated to a central clearing house, whereby the central clearing house becomes the counterparty to both of the original counterparties. Exchange-traded derivatives include derivatives executed directly on an organized exchange that provides pre-trade price transparency. (3) Reflects the net amount of the $70,183 million and $61,519 million of gross cash collateral paid and received, respectively. Of the gross cash collateral paid, $48,079 million was used to offset trading derivative liabilities. Of the gross cash collateral received, $43,554 million was used to offset trading derivative assets. (4) Represents the netting of balances with the same counterparty under enforceable netting agreements. Approximately $262 billion, $12 billion and $19 billion of the netting against trading account asset/liability balances is attributable to each of the OTC, cleared and exchange-traded derivatives, respectively. (5) Represents the netting of cash collateral paid and received by counterparties under enforceable credit support agreements. Substantially all netting of cash collateral received and paid is against OTC derivative assets and liabilities, respectively. (6) The net receivables/payables include approximately $12 billion of derivative asset and $13 billion of derivative liability fair values not subject to enforceable master netting agreements, respectively. In millions of dollars at December 31, 2020 Derivatives classified in (1)(2) Derivatives instruments designated as ASC 815 hedges Assets Liabilities Over-the-counter $ 1,781 $ 161 Cleared 74 319 Interest rate contracts $ 1,855 $ 480 Over-the-counter $ 2,037 $ 2,042 Foreign exchange contracts $ 2,037 $ 2,042 Total derivatives instruments designated as ASC 815 hedges $ 3,892 $ 2,522 Derivatives instruments not designated as ASC 815 hedges Over-the-counter $ 228,519 $ 209,330 Cleared 11,041 12,563 Exchange traded 46 38 Interest rate contracts $ 239,606 $ 221,931 Over-the-counter $ 153,791 $ 152,784 Cleared 842 1,239 Exchange traded — 1 Foreign exchange contracts $ 154,633 $ 154,024 Over-the-counter $ 29,244 $ 41,036 Cleared 1 18 Exchange traded 21,274 22,515 Equity contracts $ 50,519 $ 63,569 Over-the-counter $ 13,659 $ 17,076 Exchange traded 879 1,017 Commodity and other contracts $ 14,538 $ 18,093 Over-the-counter $ 7,826 $ 7,951 Cleared 1,963 2,178 Credit derivatives $ 9,789 $ 10,129 Total derivatives instruments not designated as ASC 815 hedges $ 469,085 $ 467,746 Total derivatives $ 472,977 $ 470,268 Cash collateral paid/received (3) $ 32,778 $ 8,196 Less: Netting agreements (4) (364,879) (364,879) Less: Netting cash collateral received/paid (5) (63,915) (45,628) Net receivables/payables included on the Consolidated Balance Sheet (6) $ 76,961 $ 67,957 Additional amounts subject to an enforceable master netting agreement, but not offset on the Consolidated Balance Sheet Less: Cash collateral received/paid $ (1,567) $ (473) Less: Non-cash collateral received/paid (7,408) (13,087) Total net receivables/payables (6) $ 67,986 $ 54,397 (1) The derivatives fair values are also presented in Note 20 to the Consolidated Financial Statements. (2) Over-the-counter (OTC) derivatives are derivatives executed and settled bilaterally with counterparties without the use of an organized exchange or central clearing house. Cleared derivatives include derivatives executed bilaterally with a counterparty in the OTC market, but then novated to a central clearing house, whereby the central clearing house becomes the counterparty to both of the original counterparties. Exchange-traded derivatives include derivatives executed directly on an organized exchange that provides pre-trade price transparency. (3) Reflects the net amount of the $78,406 million and $72,111 million of gross cash collateral paid and received, respectively. Of the gross cash collateral paid, $45,628 million was used to offset trading derivative liabilities. Of the gross cash collateral received, $63,915 million was used to offset trading derivative assets. (4) Represents the netting of balances with the same counterparty under enforceable netting agreements. Approximately $336 billion, $9 billion and $20 billion of the netting against trading account asset/liability balances is attributable to each of the OTC, cleared and exchange-traded derivatives, respectively. (5) Represents the netting of cash collateral paid and received by counterparties under enforceable credit support agreements. Substantially all netting of cash collateral received and paid is against OTC derivative assets and liabilities, respectively. (6) The net receivables/payables include approximately $6 billion of derivative asset and $8 billion of derivative liability fair values not subject to enforceable master netting agreements, respectively. For the three and six months ended June 30, 2021 and 2020, amounts recognized in Principal transactions in the Consolidated Statement of Income include certain derivatives not designated in a qualifying hedging relationship. Citigroup presents this disclosure by business classification, showing derivative gains and losses related to its trading activities together with gains and losses related to non-derivative instruments within the same trading portfolios, as this represents how these portfolios are risk managed. See Note 6 to the Consolidated Financial Statements for further information. The amounts recognized in Other revenue in the Consolidated Statement of Income related to derivatives not designated in a qualifying hedging relationship are shown below. The table below does not include any offsetting gains (losses) on the economically hedged items to the extent that such amounts are also recorded in Other revenue . Gains (losses) included in Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Interest rate contracts $ (15) $ 19 $ (75) $ 174 Foreign exchange (13) (61) (34) (37) Total $ (28) $ (42) $ (109) $ 137 Fair Value Hedges Hedging of Benchmark Interest Rate Risk Citigroup’s fair value hedges are primarily hedges of fixed-rate long-term debt or assets, such as available-for-sale debt securities or loans. For qualifying fair value hedges of interest rate risk, the changes in the fair value of the derivative and the change in the fair value of the hedged item attributable to the hedged risk are presented within Interest revenue or Interest expense based on whether the hedged item is an asset or a liability. Citigroup has executed a last-of-layer hedge, which permits an entity to hedge the interest rate risk of a stated portion of a closed portfolio of prepayable financial assets that are expected to remain outstanding for the designated tenor of the hedge. In accordance with ASC 815, an entity may exclude prepayment risk when measuring the change in fair value of the hedged item attributable to interest rate risk under the last-of-layer approach. Similar to other fair value hedges, where the hedged item is an asset, the fair value of the hedged item attributable to interest rate risk will be presented in Interest revenue along with the change in the fair value of the hedging instrument. Hedging of Foreign Exchange Risk Citigroup hedges the change in fair value attributable to foreign exchange rate movements in available-for-sale debt securities and long-term debt that are denominated in currencies other than the functional currency of the entity holding the securities or issuing the debt. The hedging instrument is generally a forward foreign exchange contract or a cross-currency swap contract. Citigroup considers the premium associated with forward contracts (i.e., the differential between the spot and contractual forward rates) as the cost of hedging; this amount is excluded from the assessment of hedge effectiveness and is generally reflected directly in earnings over the life of the hedge. Citi also excludes changes in cross-currency basis associated with cross-currency swaps from the assessment of hedge effectiveness and records it in Other comprehensive income. Hedging of Commodity Price Risk Citigroup hedges the change in fair value attributable to spot price movements in physical commodities inventories. The hedging instrument is a futures contract to sell the underlying commodity. In this hedge, the change in the value of the hedged inventory is reflected in earnings, which offsets the change in the fair value of the futures contract that is also reflected in earnings. Although the change in the fair value of the hedging instrument recorded in earnings includes changes in forward rates, Citigroup excludes the differential between the spot and the contractual forward rates under the futures contract from the assessment of hedge effectiveness, and it is generally reflected directly in earnings over the life of the hedge. Citi also excludes changes in forward rates from the assessment of hedge effectiveness and records it in Other comprehensive income. The following table summarizes the gains (losses) on the Company’s fair value hedges: Gains (losses) on fair value hedges (1) Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 In millions of dollars Other revenue Net interest revenue Other revenue Net interest revenue Other Net interest revenue Other revenue Net interest revenue Gain (loss) on the hedging derivatives included in assessment of the effectiveness of fair value hedges Interest rate hedges $ — $ 454 $ — $ 239 $ — $ (3,481) $ — $ 7,086 Foreign exchange hedges 220 — 434 — 10 — (1,477) — Commodity hedges (277) — (381) — (566) — (91) — Total gain (loss) on the hedging derivatives included in assessment of the effectiveness of fair value hedges $ (57) $ 454 $ 53 $ 239 $ (556) $ (3,481) $ (1,568) $ 7,086 Gain (loss) on the hedged item in designated and qualifying fair value hedges Interest rate hedges $ — $ (559) $ — $ (313) $ — $ 3,267 $ — $ (7,128) Foreign exchange hedges (220) — (434) — (10) — 1,477 — Commodity hedges 277 — 381 — 566 — 91 — Total gain (loss) on the hedged item in designated and qualifying fair value hedges $ 57 $ (559) $ (53) $ (313) $ 556 $ 3,267 $ 1,568 $ (7,128) Net gain (loss) on the hedging derivatives excluded from Interest rate hedges $ — $ 1 $ — $ (18) $ — $ (3) $ — $ (23) Foreign exchange hedges (2) 13 — 17 — 17 — (41) — Commodity hedges (53) — 15 — (75) — (10) — Total net gain (loss) on the hedging derivatives excluded from assessment of the effectiveness of fair value hedges $ (40) $ 1 $ 32 $ (18) $ (58) $ (3) $ (51) $ (23) (1) Gain (loss) amounts for interest rate risk hedges are included in Interest income/Interest expense . The accrued interest income on fair value hedges is recorded in Net interest revenue and is excluded from this table. (2) Amounts relate to the premium associated with forward contracts (differential between spot and contractual forward rates) that are excluded from the assessment of hedge effectiveness and are generally reflected directly in earnings. Amounts related to cross-currency basis, which are recognized in AOCI , are not reflected in the table above. The amount of cross-currency basis included in AOCI was $(13) million and $(26) million for the three and six months ended June 30, 2021 and $16 million and $49 million for the three and six months ended June 30, 2020, respectively. Cumulative Basis Adjustment Upon electing to apply ASC 815 fair value hedge accounting, the carrying value of the hedged item is adjusted to reflect the cumulative changes in the hedged risk. This cumulative hedge basis adjustment becomes part of the carrying value of the hedged item until the hedged item is derecognized from the balance sheet. The table below presents the carrying amount of Citi’s hedged assets and liabilities under qualifying fair value hedges at June 30, 2021 and December 31, 2020, along with the cumulative hedge basis adjustments included in the carrying value of those hedged assets and liabilities, that would reverse through earnings in future periods. In millions of dollars Balance sheet line item in which hedged item is recorded Carrying amount of hedged asset/ liability Cumulative fair value hedging adjustment increasing (decreasing) the carrying amount Active De-designated As of June 30, 2021 Debt securities AFS (1)(3) $ 78,108 $ 59 $ 126 Long-term debt 159,712 2,563 4,177 As of December 31, 2020 Debt securities AFS (2)(3) $ 81,082 $ 28 $ 342 Long-term debt 169,026 5,554 4,989 (1) These amounts include a cumulative basis adjustment of $111 million for active hedges and $(131) million for de-designated hedges as of June 30, 2021, related to certain prepayable financial assets previously designated as the hedged item in a fair value hedge using the last-of-layer approach. The Company designated approximately $7 billion as the hedged amount (from a closed portfolio of prepayable financial assets with a carrying value of $33 billion as of June 30, 2021) in a last-of-layer hedging relationship. (2) These amounts include a cumulative basis adjustment of $(18) million for active hedges and $62 million for de-designated hedges as of December 31, 2020, related to certain prepayable financial assets designated as the hedged item in a fair value hedge using the last-of-layer approach. The Company designated approximately $3 billion as the hedged amount (from a closed portfolio of prepayable financial assets with a carrying value of $19 billion as of December 31, 2020) in a last-of-layer hedging relationship. (3) Carrying amount represents the amortized cost. Cash Flow Hedges Citigroup hedges the variability of forecasted cash flows due to changes in contractually specified interest rates associated with floating-rate assets/liabilities and other forecasted transactions. These cash flow hedging relationships use either regression analysis or dollar-offset ratio analysis to assess whether the hedging relationships are highly effective at inception and on an ongoing basis. For cash flow hedges, the entire change in the fair value of the hedging derivative is recognized in AOCI and then reclassified to earnings in the same period that the forecasted hedged cash flows impact earnings. The net gain (loss) associated with cash flow hedges expected to be reclassified from AOCI within 12 months of June 30, 2021 is approximately $1 billion. The maximum length of time over which forecasted cash flows are hedged is 10 years. The pretax change in AOCI from cash flow hedges is presented below. The after-tax impact of cash flow hedges on AOCI is shown in Note 17 to the Consolidated Financial Statements. Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Amount of gain (loss) recognized in AOCI on derivatives Interest rate contracts $ 39 $ 294 $ (416) $ 2,791 Foreign exchange contracts (3) (5) — (16) Total gain (loss) recognized in AOCI $ 36 $ 289 $ (416) $ 2,775 Other Net interest Other Other Net interest Other Net interest Amount of gain (loss) reclassified from AOCI to earnings (1) Interest rate contracts $ — $ 266 $ — $ 200 $ — $ 544 $ — $ 203 Foreign exchange contracts (1) — (1) — (2) — (2) — Total gain (loss) reclassified from AOCI into earnings $ (1) $ 266 $ (1) $ 200 $ (2) $ 544 $ (2) $ 203 Net pretax change in cash flow hedges included within AOCI $ (229) $ 90 $ (958) $ 2,574 (1) All amounts reclassified into earnings for interest rate contracts are included in Interest income/Interest expense (Net interest revenue) . For all other hedges, the amounts reclassified to earnings are included primarily in Other revenue and Net interest revenue in the Consolidated Statement of Income. Net Investment Hedges The pretax gain (loss) recorded in Foreign currency translation adjustment within AOCI , related to net investment hedges, was ($426) million and $131 million for the three and six months ended June 30, 2021 and $(741) million and $1,419 million for the three and six months ended June 30, 2020, respectively. Credit Derivatives The following tables summarize the key characteristics of Citi’s credit derivatives portfolio by counterparty and derivative form: Fair values Notionals In millions of dollars at June 30, 2021 Receivable (1) Payable (2) Protection Protection By industry of counterparty Banks $ 2,498 $ 3,167 $ 107,848 $ 103,288 Broker-dealers 1,817 1,124 45,629 41,188 Non-financial 119 79 6,089 2,774 Insurance and other financial 5,418 6,107 472,875 416,656 Total by industry of counterparty $ 9,852 $ 10,477 $ 632,441 $ 563,906 By instrument Credit default swaps and options $ 9,170 $ 9,784 $ 615,504 $ 556,760 Total return swaps and other 682 693 16,937 7,146 Total by instrument $ 9,852 $ 10,477 $ 632,441 $ 563,906 By rating of reference entity Investment grade $ 4,192 $ 4,036 $ 477,097 $ 421,549 Non-investment grade 5,660 6,441 155,344 142,357 Total by rating of reference entity $ 9,852 $ 10,477 $ 632,441 $ 563,906 By maturity Within 1 year $ 937 $ 1,479 $ 132,426 $ 123,092 From 1 to 5 years 6,157 6,323 441,620 396,219 After 5 years 2,758 2,675 58,395 44,595 Total by maturity $ 9,852 $ 10,477 $ 632,441 $ 563,906 (1) The fair value amount receivable is composed of $3,376 million under protection purchased and $6,476 million under protection sold. (2) The fair value amount payable is composed of $7,228 million under protection purchased and $3,249 million under protection sold. Fair values Notionals In millions of dollars at December 31, 2020 Receivable (1) Payable (2) Protection Protection By industry of counterparty Banks $ 2,902 $ 3,187 $ 117,685 $ 120,739 Broker-dealers 1,770 1,215 46,928 44,692 Non-financial 109 90 5,740 2,217 Insurance and other financial 5,008 5,637 442,417 375,959 Total by industry of counterparty $ 9,789 $ 10,129 $ 612,770 $ 543,607 By instrument Credit default swaps and options $ 9,254 $ 9,254 $ 599,633 $ 538,426 Total return swaps and other 535 875 13,137 5,181 Total by instrument $ 9,789 $ 10,129 $ 612,770 $ 543,607 By rating of reference entity Investment grade $ 4,136 $ 4,037 $ 478,643 $ 418,147 Non-investment grade 5,653 6,092 134,127 125,460 Total by rating of reference entity $ 9,789 $ 10,129 $ 612,770 $ 543,607 By maturity Within 1 year $ 914 $ 1,355 $ 134,080 $ 125,464 From 1 to 5 years 6,022 5,991 421,682 374,376 After 5 years 2,853 2,783 57,008 43,767 Total by maturity $ 9,789 $ 10,129 $ 612,770 $ 543,607 (1) The fair value amount receivable is composed of $3,514 million under protection purchased and $6,275 million under protection sold. (2) The fair value amount payable is composed of $7,037 million under protection purchased and $3,092 million under protection sold. Credit Risk-Related Contingent Features in Derivatives Certain derivative instruments contain provisions that require the Company to either post additional collateral or immediately settle any outstanding liability balances upon the occurrence of a specified event related to the credit risk of the Company. These events, which are defined by the existing derivative contracts, are primarily downgrades in the credit ratings of the Company and its affiliates. The fair value (excluding CVA) of all derivative instruments with credit risk-related contingent features that were in a net liability position at June 30, 2021 and December 31, 2020 was $21 billion and $25 billion, respectively. The Company posted $19 billion and $22 billion as collateral for this exposure in the normal course of business as of June 30, 2021 and December 31, 2020, respectively. A downgrade could trigger additional collateral or cash settlement requirements for the Company and certain affiliates. In the event that Citigroup and Citibank were downgraded a single notch by all three major rating agencies as of June 30, 2021, the Company could be required to post an additional $1.2 billion as either collateral or settlement of the derivative transactions. In addition, the Company could be required to segregate with third-party custodians collateral previously received from existing derivative counterparties in the amount of $0.2 billion upon the single notch downgrade, resulting in aggregate cash obligations and collateral requirements of approximately $1.4 billion. Derivatives Accompanied by Financial Asset Transfers For transfers of financial assets accounted for as a sale by the Company, and for which the Company has retained substantially all of the economic exposure to the transferred asset through a total return swap executed with the same counterparty in contemplation of the initial sale (and still outstanding), both the asset amounts derecognized and the gross cash proceeds received as of the date of derecognition were $3.9 billion and $2.0 billion as of June 30, 2021 and December 31, 2020, respectively. At June 30, 2021, the fair value of these previously derecognized assets was $3.9 billion. The fair value of the total return swaps as of June 30, 2021 was $62 million recorded as gross derivative assets and $21 million recorded as gross derivative liabilities. At December 31, 2020, the fair value of these previously derecognized assets was $2.2 billion, and the fair value of the total return swaps was $135 million recorded as gross derivative assets and $7 million recorded as gross derivative liabilities. The balances for the total return swaps are on a gross basis, before the application of counterparty and cash collateral netting, and are included primarily as equity derivatives in the tabular disclosures in this Note.

FAIR VALUE MEASUREMENT

FAIR VALUE MEASUREMENT	6 Months Ended
	Jun. 30, 2021
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENT	FAIR VALUE MEASUREMENT For additional information regarding fair value measurement at Citi, see Note 24 to the Consolidated Financial Statements in Citi’s 2020 Annual Report on Form 10-K. Market Valuation Adjustments The table below summarizes the credit valuation adjustments (CVA) and funding valuation adjustments (FVA) applied to the fair value of derivative instruments at June 30, 2021 and December 31, 2020: Credit and funding valuation adjustments In millions of dollars June 30, December 31, Counterparty CVA $ (617) $ (800) Asset FVA (434) (525) Citigroup (own credit) CVA 335 403 Liability FVA 78 67 Total CVA—derivative instruments $ (638) $ (855) The table below summarizes pretax gains (losses) related to changes in CVA on derivative instruments, net of hedges, FVA on derivatives and debt valuation adjustments (DVA) on Citi’s own fair value option (FVO) liabilities for the periods indicated: Credit/funding/debt valuation Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Counterparty CVA $ 34 $ 45 $ 43 $ (238) Asset FVA 25 632 94 (421) Own credit CVA (41) (271) (78) 262 Liability FVA (13) (214) 11 123 Total CVA—derivative instruments $ 5 $ 192 $ 70 $ (274) DVA related to own FVO liabilities (1) $ (110) $ (2,935) $ (148) $ 1,253 Total CVA and DVA $ (105) $ (2,743) $ (78) $ 979 (1) See Notes 1 and 17 to the Consolidated Financial Statements in Citi’s 2020 Annual Report on Form 10-K. Fair Value Hierarchy ASC 820-10 specifies a hierarchy of inputs based on whether the inputs are observable or unobservable. Observable inputs are developed using market data and reflect market participant assumptions, while unobservable inputs reflect the Company’s market assumptions. These two types of inputs have created the following fair value hierarchy: • Level 1: Quoted prices for identical instruments in active markets. • Level 2: Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-derived valuations in which all significant inputs and significant value drivers are observable in the market. • Level 3: Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable . As required under the fair value hierarchy, the Company considers relevant and observable market inputs in its valuations where possible. The frequency of transactions, the size of the bid/ask spread and the amount of adjustment necessary when comparing similar transactions are all factors in determining the relevance of observed prices in those markets. Items Measured at Fair Value on a Recurring Basis The following tables present for each of the fair value hierarchy levels the Company’s assets and liabilities that are measured at fair value on a recurring basis at June 30, 2021 and December 31, 2020. The Company may hedge positions that have been classified in the Level 3 category with other financial instruments (hedging instruments) that may be classified as Level 3, but also with financial instruments classified as Level 1 or Level 2. The effects of these hedges are presented gross in the following tables: Fair Value Levels In millions of dollars at June 30, 2021 Level 1 Level 2 Level 3 Gross Netting (1) Net Assets Securities borrowed and purchased under agreements to resell $ — $ 275,313 $ 211 $ 275,524 $ (87,648) $ 187,876 Trading non-derivative assets Trading mortgage-backed securities U.S. government-sponsored agency guaranteed — 31,998 376 32,374 — 32,374 Residential — 368 95 463 — 463 Commercial — 900 87 987 — 987 Total trading mortgage-backed securities $ — $ 33,266 $ 558 $ 33,824 $ — $ 33,824 U.S. Treasury and federal agency securities $ 60,491 $ 3,004 $ — $ 63,495 $ — $ 63,495 State and municipal — 1,540 70 1,610 — 1,610 Foreign government 60,726 30,205 141 91,072 — 91,072 Corporate 1,939 18,840 823 21,602 — 21,602 Equity securities 55,141 13,038 147 68,326 — 68,326 Asset-backed securities — 1,016 692 1,708 — 1,708 Other trading assets (2) 305 14,838 555 15,698 — 15,698 Total trading non-derivative assets $ 178,602 $ 115,747 $ 2,986 $ 297,335 $ — $ 297,335 Trading derivatives Interest rate contracts $ 61 $ 183,139 $ 2,777 $ 185,977 Foreign exchange contracts — 118,018 553 118,571 Equity contracts — 46,973 1,542 48,515 Commodity contracts — 24,306 891 25,197 Credit derivatives — 8,994 858 9,852 Total trading derivatives—before netting and collateral $ 61 $ 381,430 $ 6,621 $ 388,112 Cash collateral paid (3) $ 22,104 Netting agreements $ (293,047) Netting of cash collateral received (43,554) Total trading derivatives—after netting and collateral $ 61 $ 381,430 $ 6,621 $ 410,216 $ (336,601) $ 73,615 Investments Mortgage-backed securities U.S. government-sponsored agency guaranteed $ — $ 39,258 $ 52 $ 39,310 $ — $ 39,310 Residential — 404 — 404 — 404 Commercial — 43 — 43 — 43 Total investment mortgage-backed securities $ — $ 39,705 $ 52 $ 39,757 $ — $ 39,757 U.S. Treasury and federal agency securities $ 126,147 $ — $ — $ 126,147 $ — $ 126,147 State and municipal — 2,331 748 3,079 — 3,079 Foreign government 66,557 52,703 957 120,217 — 120,217 Corporate 4,358 3,441 104 7,903 — 7,903 Marketable equity securities 129 66 — 195 — 195 Asset-backed securities — 208 3 211 — 211 Other debt securities — 5,663 — 5,663 — 5,663 Non-marketable equity securities (4) — 69 382 451 — 451 Total investments $ 197,191 $ 104,186 $ 2,246 $ 303,623 $ — $ 303,623 Table continues on the next page. In millions of dollars at June 30, 2021 Level 1 Level 2 Level 3 Gross Netting (1) Net Loans $ — $ 7,278 $ 429 $ 7,707 $ — $ 7,707 Mortgage servicing rights — — 419 419 — 419 Non-trading derivatives and other financial assets measured on a recurring basis $ 3,457 $ 7,571 $ 55 $ 11,083 $ — $ 11,083 Total assets $ 379,311 $ 891,525 $ 12,967 $ 1,305,907 $ (424,249) $ 881,658 Total as a percentage of gross assets (5) 29.5% 69.4% 1.0% Liabilities Interest-bearing deposits $ — $ 2,595 $ 154 $ 2,749 $ — $ 2,749 Securities loaned and sold under agreements to repurchase — 157,088 488 157,576 (80,871) 76,705 Trading account liabilities Securities sold, not yet purchased 91,879 21,740 168 113,787 — 113,787 Other trading liabilities — 13 1 14 — 14 Total trading liabilities $ 91,879 $ 21,753 $ 169 $ 113,801 $ — $ 113,801 Trading derivatives Interest rate contracts $ 42 $ 167,686 $ 1,013 $ 168,741 Foreign exchange contracts 2 115,996 737 116,735 Equity contracts — 55,835 4,092 59,927 Commodity contracts — 27,437 749 28,186 Credit derivatives — 9,578 899 10,477 Total trading derivatives—before netting and collateral $ 44 $ 376,532 $ 7,490 $ 384,066 Cash collateral received (6) $ 17,965 Netting agreements $ (293,047) Netting of cash collateral paid (48,079) Total trading derivatives—after netting and collateral $ 44 $ 376,532 $ 7,490 $ 402,031 $ (341,126) $ 60,905 Short-term borrowings $ — $ 7,317 $ 41 $ 7,358 $ — $ 7,358 Long-term debt — 51,307 25,068 76,375 — 76,375 Total non-trading derivatives and other financial liabilities measured on a recurring basis $ 3,152 $ 123 $ 4 $ 3,279 $ 3,279 Total liabilities $ 95,075 $ 616,715 $ 33,414 $ 763,169 $ (421,997) $ 341,172 Total as a percentage of gross liabilities (5) 12.8 % 82.8 % 4.5 % (1) Represents netting of (i) the amounts due under securities purchased under agreements to resell and the amounts owed under securities sold under agreements to repurchase and (ii) derivative exposures covered by a qualifying master netting agreement and cash collateral offsetting. (2) Includes positions related to investments in unallocated precious metals, as discussed in Note 21 to the Consolidated Financial Statements. Also includes physical commodities accounted for at the lower of cost or fair value and unfunded credit products. (3) Reflects the net amount of $70,183 million of gross cash collateral paid, of which $48,079 million was used to offset trading derivative liabilities. (4) Amounts exclude $0.1 billion of investments measured at net asset value (NAV) in accordance with ASU 2015-07, Fair Value Measurement (Topic 820): Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent). (5) Because the amount of the cash collateral paid/received has not been allocated to the Level 1, 2 and 3 subtotals, these percentages are calculated based on total assets and liabilities measured at fair value on a recurring basis, excluding the cash collateral paid/received on derivatives. (6) Reflects the net amount of $61,519 million of gross cash collateral received, of which $43,554 million was used to offset trading derivative assets. Fair Value Levels In millions of dollars at December 31, 2020 Level 1 Level 2 Level 3 Gross Netting (1) Net Assets Securities borrowed and purchased under agreements to resell $ — $ 335,073 $ 320 $ 335,393 $ (150,189) $ 185,204 Trading non-derivative assets Trading mortgage-backed securities U.S. government-sponsored agency guaranteed — 42,903 27 42,930 — 42,930 Residential — 391 340 731 — 731 Commercial — 893 136 1,029 — 1,029 Total trading mortgage-backed securities $ — $ 44,187 $ 503 $ 44,690 $ — $ 44,690 U.S. Treasury and federal agency securities $ 64,529 $ 2,269 $ — $ 66,798 $ — $ 66,798 State and municipal — 1,224 94 1,318 — 1,318 Foreign government 68,195 15,143 51 83,389 — 83,389 Corporate 1,607 18,840 375 20,822 — 20,822 Equity securities 54,117 12,289 73 66,479 — 66,479 Asset-backed securities — 776 1,606 2,382 — 2,382 Other trading assets (2) — 11,295 945 12,240 — 12,240 Total trading non-derivative assets $ 188,448 $ 106,023 $ 3,647 $ 298,118 $ — $ 298,118 Trading derivatives Interest rate contracts $ 42 $ 238,026 $ 3,393 $ 241,461 Foreign exchange contracts 2 155,994 674 156,670 Equity contracts 66 48,362 2,091 50,519 Commodity contracts — 13,546 992 14,538 Credit derivatives — 8,634 1,155 9,789 Total trading derivatives—before netting and collateral $ 110 $ 464,562 $ 8,305 $ 472,977 Cash collateral paid (3) $ 32,778 Netting agreements $ (364,879) Netting of cash collateral received (63,915) Total trading derivatives—after netting and collateral $ 110 $ 464,562 $ 8,305 $ 505,755 $ (428,794) $ 76,961 Investments Mortgage-backed securities U.S. government-sponsored agency guaranteed $ — $ 43,888 $ 30 $ 43,918 $ — $ 43,918 Residential — 571 — 571 — 571 Commercial — 50 — 50 — 50 Total investment mortgage-backed securities $ — $ 44,509 $ 30 $ 44,539 $ — $ 44,539 U.S. Treasury and federal agency securities $ 146,032 $ 172 $ — $ 146,204 $ — $ 146,204 State and municipal — 2,885 834 3,719 — 3,719 Foreign government 77,056 47,644 268 124,968 — 124,968 Corporate 6,326 4,114 60 10,500 — 10,500 Marketable equity securities 287 228 — 515 — 515 Asset-backed securities — 277 1 278 — 278 Other debt securities — 4,876 — 4,876 — 4,876 Non-marketable equity securities (4) — 50 349 399 — 399 Total investments $ 229,701 $ 104,755 $ 1,542 $ 335,998 $ — $ 335,998 Table continues on the next page. In millions of dollars at December 31, 2020 Level 1 Level 2 Level 3 Gross Netting (2) Net Loans $ — $ 4,869 $ 1,985 $ 6,854 $ — $ 6,854 Mortgage servicing rights — — 336 336 — 336 Non-trading derivatives and other financial assets measured on a recurring basis $ 6,230 $ 8,383 $ — $ 14,613 $ — $ 14,613 Total assets $ 424,489 $ 1,023,665 $ 16,135 $ 1,497,067 $ (578,983) $ 918,084 Total as a percentage of gross assets (5) 29.0% 69.9% 1.1% Liabilities Interest-bearing deposits $ — $ 1,752 $ 206 $ 1,958 $ — $ 1,958 Securities loaned and sold under agreements to repurchase — 156,644 631 157,275 (97,069) 60,206 Trading account liabilities Securities sold, not yet purchased 85,353 14,477 214 100,044 — 100,044 Other trading liabilities — — 26 26 — 26 Total trading liabilities $ 85,353 $ 14,477 $ 240 $ 100,070 $ — $ 100,070 Trading account derivatives Interest rate contracts $ 25 $ 220,607 $ 1,779 $ 222,411 Foreign exchange contracts 3 155,441 622 156,066 Equity contracts 53 58,212 5,304 63,569 Commodity contracts — 17,393 700 18,093 Credit derivatives — 9,022 1,107 10,129 Total trading derivatives—before netting and collateral $ 81 $ 460,675 $ 9,512 $ 470,268 Cash collateral received (6) $ 8,196 Netting agreements $ (364,879) Netting of cash collateral paid (45,628) Total trading derivatives—after netting and collateral $ 81 $ 460,675 $ 9,512 $ 478,464 $ (410,507) $ 67,957 Short-term borrowings $ — $ 4,464 $ 219 $ 4,683 $ — $ 4,683 Long-term debt — 41,853 25,210 67,063 — 67,063 Non-trading derivatives and other financial liabilities measured on a recurring basis $ 6,762 $ 72 $ 1 $ 6,835 $ — $ 6,835 Total liabilities $ 92,196 $ 679,937 $ 36,019 $ 816,348 $ (507,576) $ 308,772 Total as a percentage of gross liabilities (5) 11.4 % 84.1 % 4.5 % (1) Represents netting of (i) the amounts due under securities purchased under agreements to resell and the amounts owed under securities sold under agreements to repurchase and (ii) derivative exposures covered by a qualifying master netting agreement and cash collateral offsetting. (2) Includes positions related to investments in unallocated precious metals, as discussed in Note 21 to the Consolidated Financial Statements. Also includes physical commodities accounted for at the lower of cost or fair value and unfunded credit products. (3) Reflects the net amount of $78,406 million of gross cash collateral paid, of which $45,628 million was used to offset trading derivative liabilities. (4) Amounts exclude $0.2 billion of investments measured at NAV in accordance with ASU 2015-07, Fair Value Measurement (Topic 820): Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent). (5) Because the amount of the cash collateral paid/received has not been allocated to the Level 1, 2 and 3 subtotals, these percentages are calculated based on total assets and liabilities measured at fair value on a recurring basis, excluding the cash collateral paid/received on derivatives. (6) Reflects the net amount of $72,111 million of gross cash collateral received, of which $63,915 million was used to offset trading derivative assets. Changes in Level 3 Fair Value Category The following tables present the changes in the Level 3 fair value category for the three and six months ended June 30, 2021 and 2020. The gains and losses presented below include changes in the fair value related to both observable and unobservable inputs. The Company often hedges positions with offsetting positions that are classified in a different level. For example, the gains and losses for assets and liabilities in the Level 3 category presented in the tables below do not reflect the effect of offsetting losses and gains on hedging instruments that may be classified in the Level 1 or Level 2 categories. In addition, the Company hedges items classified in the Level 3 category with instruments also classified in Level 3 of the fair value hierarchy. The hedged items and related hedges are presented gross in the following tables: Level 3 Fair Value Rollforward Net realized/unrealized gains (losses) incl. in (1) Transfers Unrealized (3) In millions of dollars Mar. 31, 2021 Principal Other (1)(2) into out of Purchases Issuances Sales Settlements Jun. 30, 2021 Assets Securities borrowed and purchased under agreements to resell $ 262 $ (2) $ — $ — $ (49) $ 43 $ — $ — $ (43) $ 211 $ 1 Trading non-derivative assets Trading mortgage-backed securities U.S. government-sponsored agency guaranteed 38 2 — 238 (7) 113 — (8) — 376 (12) Residential 268 (1) — 41 (65) 57 — (205) — 95 2 Commercial 59 16 — 60 (8) 11 — (51) — 87 3 Total trading mortgage-backed securities $ 365 $ 17 $ — $ 339 $ (80) $ 181 $ — $ (264) $ — $ 558 $ (7) U.S. Treasury and federal agency securities $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — State and municipal 94 — — — (29) 5 — — — 70 — Foreign government 81 4 — 125 (28) 14 — (55) — 141 1 Corporate 290 (15) — 312 (50) 408 — (122) — 823 (36) Marketable equity securities 89 2 — 80 (40) 23 — (7) — 147 15 Asset-backed securities 1,208 209 — 17 (148) 352 — (946) — 692 22 Other trading assets 571 62 — 31 (121) 201 — (189) — 555 4 Total trading non-derivative assets $ 2,698 $ 279 $ — $ 904 $ (496) $ 1,184 $ — $ (1,583) $ — $ 2,986 $ (1) Trading derivatives, net (4) Interest rate contracts $ 1,229 $ (126) $ — $ 218 $ 321 $ 2 $ — $ — $ 120 $ 1,764 $ (70) Foreign exchange contracts (86) 59 — — 4 111 — (282) 10 (184) (28) Equity contracts (2,876) 309 — (634) 892 85 — (94) (232) (2,550) 349 Commodity contracts 732 236 — (148) (612) 28 — (45) (49) 142 (194) Credit derivatives 71 (57) — (52) (74) — — — 71 (41) (107) Total trading derivatives, net (4) $ (930) $ 421 $ — $ (616) $ 531 $ 226 $ — $ (421) $ (80) $ (869) $ (50) Table continues on the next page. Net realized/unrealized gains (losses) incl. in (1) Transfers Unrealized (3) In millions of dollars Mar. 31, 2021 Principal Other (1)(2) into out of Purchases Issuances Sales Settlements Jun. 30, 2021 Investments Mortgage-backed securities U.S. government-sponsored agency guaranteed $ 30 $ — $ 2 $ 22 $ — $ 3 $ — $ (5) $ — $ 52 $ (21) Total investment mortgage-backed securities $ 30 $ — $ 2 $ 22 $ — $ 3 $ — $ (5) $ — $ 52 $ (21) U.S. Treasury and federal agency securities $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — State and municipal 794 — 8 54 (108) 2 — (2) — 748 6 Foreign government 523 — 3 440 (289) 315 — (35) — 957 3 Corporate 56 — (7) 32 — 30 — (7) — 104 (1) Asset-backed securities 4 — (21) 33 — — — (13) — 3 1 Non-marketable equity securities 352 — 30 — — — — — — 382 2 Total investments $ 1,759 $ — $ 15 $ 581 $ (397) $ 350 $ — $ (62) $ — $ 2,246 $ (10) Loans $ 1,944 $ — $ 476 $ 60 $ (2,051) $ — $ — $ — $ — $ 429 $ 169 Mortgage servicing rights 433 — (21) — — — 25 — (18) 419 (21) Other financial assets measured on a recurring basis — — — 55 — — — — — 55 — Liabilities Interest-bearing deposits $ 199 $ — $ 2 $ — $ (44) $ — $ 11 $ — $ (10) $ 154 $ — Securities loaned and sold under agreements to repurchase 977 22 — — (483) 80 — — (64) 488 — Trading account liabilities Securities sold, not yet purchased 167 7 — 54 (21) 10 — — (35) 168 26 Other trading liabilities 6 5 — — — — — — — 1 4 Short-term borrowings 49 33 — 40 (32) — 17 — — 41 17 Long-term debt 26,337 (849) — 3,937 (5,966) — 1,825 — (1,914) 25,068 (699) Other financial liabilities measured on a recurring basis 8 — — — (4) — — — 4 — (1) Net realized/unrealized gains (losses) are presented as increase (decrease) to Level 3 assets, and as (increase) decrease to Level 3 liabilities. Changes in fair value of available-for-sale debt securities are recorded in AOCI , unless related to credit impairment, while gains and losses from sales are recorded in Realized gains (losses) from sales of investments in the Consolidated Statement of Income. (2) Unrealized gains (losses) on MSRs are recorded in Other revenue in the Consolidated Statement of Income. (3) Represents the amount of total gains or losses for the period, included in earnings (and AOCI for changes in fair value of available-for-sale debt securities and DVA on fair value option liabilities), attributable to the change in fair value relating to assets and liabilities classified as Level 3 that are still held at June 30, 2021. (4) Total Level 3 trading derivative assets and liabilities have been netted in these tables for presentation purposes only. Net realized/unrealized gains (losses) incl. in (1) Transfers Unrealized (3) In millions of dollars Dec. 31, 2020 Principal Other (1)(2) into out of Purchases Issuances Sales Settlements Jun. 30, 2021 Assets Securities borrowed and purchased under agreements to resell $ 320 $ (11) $ — $ — $ (49) $ 276 $ — $ — $ (325) $ 211 $ 1 Trading non-derivative assets Trading mortgage-backed securities U.S. government-sponsored agency guaranteed 27 1 — 252 (8) 114 — (10) — 376 16 Residential 340 22 — 69 (68) 201 — (469) — 95 18 Commercial 136 21 — 76 (41) 24 — (129) — 87 2 Total trading mortgage-backed securities $ 503 $ 44 $ — $ 397 $ (117) $ 339 $ — $ (608) $ — $ 558 $ 36 U.S. Treasury and federal agency securities $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — State and municipal 94 — — — (29) 5 — — — 70 1 Foreign government 51 5 — 136 (28) 71 — (94) — 141 (6) Corporate 375 75 — 318 (168) 475 — (252) — 823 (7) Marketable equity securities 73 47 — 84 (42) 35 — (50) — 147 32 Asset-backed securities 1,606 248 — 35 (198) 934 — (1,933) — 692 8 Other trading assets 945 18 — 61 (129) 348 4 (688) (4) 555 (5) Total trading non-derivative assets $ 3,647 $ 437 $ — $ 1,031 $ (711) $ 2,207 $ 4 $ (3,625) $ (4) $ 2,986 $ 59 Trading derivatives, net (4) Interest rate contracts $ 1,614 $ (298) $ — $ 173 $ 321 $ 2 $ (84) $ — $ 36 $ 1,764 $ (197) Foreign exchange contracts 52 (79) — 8 4 134 — (297) (6) (184) (57) Equity contracts (3,213) 612 — (598) 898 109 — (117) (241) (2,550) 213 Commodity contracts 292 550 — 10 (617) 94 — (155) (32) 142 280 Credit derivatives 48 (121) — 15 (71) — — — 88 (41) (198) Total trading derivatives, net (4) $ (1,207) $ 664 $ — $ (392) $ 535 $ 339 $ (84) $ (569) $ (155) $ (869) $ 41 Investments Mortgage-backed securities U.S. government-sponsored agency guaranteed $ 30 $ — $ 2 $ 22 $ — $ 3 $ — $ (5) $ — $ 52 $ (42) Total investment mortgage-backed securities $ 30 $ — $ 2 $ 22 $ — $ 3 $ — $ (5) $ — $ 52 $ (42) U.S. Treasury and federal agency securities $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — State and municipal 834 — (10) 58 (108) 3 — (29) — 748 (8) Foreign government 268 — 1 440 (289) 645 — (108) — 957 3 Corporate 60 — (11) 32 — 30 — (7) — 104 (1) Asset-backed securities 1 — (21) 36 — — — (13) — 3 (37) Non-marketable equity securities 349 — 40 1 — — — (8) — 382 2 Total investments $ 1,542 $ — $ 1 $ 589 $ (397) $ 681 $ — $ (170) $ — $ 2,246 $ (83) Net realized/unrealized gains (losses) incl. in (1) Transfers Unrealized (3) In millions of dollars Dec. 31 2020 Principal Other (1)(2) into out of Purchases Issuances Sales Settlements Jun. 30, 2021 Loans $ 1,985 $ — $ 348 $ 271 $ (2,051) $ — $ 1 $ — $ (125) $ 429 $ 100 Mortgage servicing rights 336 — 52 — — — 68 — (37) 419 59 Other financial assets measured on a recurring basis — — — 55 — — — — — 55 — Liabilities Interest-bearing deposits $ 206 $ — $ 18 $ — $ (44) $ — $ 20 $ — $ (10) $ 154 $ (45) Securities loaned and sold under agreements to repurchase 631 7 — — (483) 488 — — (141) $ 488 19 Trading account liabilities Securities sold, not yet purchased 214 61 — 62 (25) 20 — — (42) $ 168 (2) Other trading liabilities 26 25 — — — — — — — $ 1 — Short-term borrowings 219 32 — 42 (44) — 25 — (169) $ 41 17 Long-term debt 25,210 1,773 — 4,869 (5,968) — 7,545 — (4,815) $ 25,068 791 Other financial liabilities measured on a recurring basis 1 — (3) — (4) — 14 — (10) $ 4 — (1) Net realized/unrealized gains (losses) are presented as increase (decrease) to Level 3 assets, and as (increase) decrease to Level 3 liabilities. Changes in fair value of available-for-sale debt securities are recorded in AOCI , unless related to other-than-temporary impairment, while gains and losses from sales are recorded in Realized gains (losses) from sales of investments in the Consolidated Statement of Income. (2) Unrealized gains (losses) on MSRs are recorded in Other revenue in the Consolidated Statement of Income. (3) Represents the amount of total gains or losses for the period, included in earnings (and AOCI for changes in fair value of available-for-sale debt securities and DVA on fair value option liabilities), attributable to the change in fair value relating to assets and liabilities classified as Level 3 that are still held at June 30, 2021. (4) Total Level 3 trading derivative assets and liabilities have been netted in these tables for presentation purposes only. Net realized/unrealized gains (losses) incl. in (1) Transfers Unrealized (3) In millions of dollars Mar. 31, 2020 Principal Other (1)(2) into out of Purchases Issuances Sales Settlements Jun. 30, 2020 Assets Securities borrowed or purchased under agreements to resell $ 300 $ 34 $ — $ — $ — $ 42 $ — $ — $ (50) $ 326 $ 36 Trading non-derivative assets Trading mortgage-backed securities U.S. government-sponsored agency guaranteed 85 1 — 4 (6) 67 — (55) — 96 4 Residential 304 14 — 144 (39) 96 — (86) — 433 7 Commercial 44 4 — 140 (14) 62 — (19) — 217 11 Total trading mortgage-backed securities $ 433 $ 19 $ — $ 288 $ (59) $ 225 $ — $ (160) $ — $ 746 $ 22 U.S. Treasury and federal agency securities $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — State and municipal 92 — — 5 (1) 41 — (20) — 117 — Foreign government 39 57 — 2 (2) 18 — (88) — 26 54 Corporate 412 (12) — 64 (78) 204 — (185) (6) 399 (71) Equity securities 143 9 — 10 — 174 — (244) — 92 (3) Asset-backed securities 1,561 67 — 257 (56) 272 — (316) — 1,785 46 Other trading assets 639 27 — 153 (15) 126 6 (134) (5) 797 1 Total trading non-derivative assets $ 3,319 $ 167 $ — $ 779 $ (211) $ 1,060 $ 6 $ (1,147) $ (11) $ 3,962 $ 49 Trading derivatives, net (4) Interest rate contracts $ 1,755 $ 24 $ — $ 231 $ 20 $ 1 $ — $ — $ (63) $ 1,968 $ 7 Foreign exchange contracts 2 (37) — (8) 2 5 — (5) 15 (26) (47) Equity contracts (1,836) (354) — (104) 12 21 — (5) 31 (2,235) (349) Commodity contracts (542) 253 — (1) (14) 20 — (10) 16 (278) 241 Credit derivatives 816 (367) — 17 (72) — — — 8 402 (367) Total trading derivatives, net (4) $ 195 $ (481) $ — $ 135 $ (52) $ 47 $ — $ (20) $ 7 $ (169) $ (515) Investments Mortgage-backed securities U.S. government-sponsored agency guaranteed $ 47 $ — $ (19) $ 1 $ — $ 1 $ — $ — $ — $ 30 $ (36) Residential — — — — — — — — — — — Commercial — — — — — — — — — — — Total investment mortgage-backed securities $ 47 $ — $ (19) $ 1 $ — $ 1 $ — $ — $ — $ 30 $ (36) U.S. Treasury and federal agency securities $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — State and municipal 687 — 24 172 (131) 95 — (22) — 825 21 Foreign government 225 — 7 — (64) 61 — (33) — 196 6 Corporate 238 — 10 — (152) 10 — — — 106 — Equity securities — — — 1 — — — — — 1 — Asset-backed securities 16 — (2) — — — — (8) — 6 — Other debt securities — — — — — — — — — — — Non-marketable equity securities 354 — 21 — — 2 — — (45) 332 25 Total investments $ 1,567 $ — $ 41 $ 174 $ (347) $ 169 $ — $ (63) $ (45) $ 1,496 $ 16 Table continues on the next page. Net realized/unrealized gains (losses) incl. in (1) Transfers Unrealized (3) In millions of dollars Mar. 31, 2020 Principal Other (1)(2) into out of Purchases Issuances Sales Settlements Jun. 30, 2020 Loans $ 537 $ — $ 447 $ — $ (5) $ — $ — $ — $ (1) $ 978 $ 355 Mortgage servicing rights 367 — (26) — — — 24 — (20) 345 (14) Other financial assets measured on a recurring basis — — 14 — — — (6) (4) (4) — 2 Liabilities Interest-bearing deposits $ 491 $ — $ (5) $ — $ (151) $ — $ 30 $ — $ (138) $ 237 $ (27) Securities loaned or sold under agreements to repurchase 730 — — — — — — — (105) 625 — Trading account liabilities Securities sold, not yet purchased 200 (28) — 43 (8) — — — (159) 104 24 Other trading liabilities — — — — — — — — — — — Short-term borrowings 52 9 — 75 (6) — 23 — (7) 128 16 Long-term debt 19,269 (1,691) — 1,875 (1,475) — 2,527 — (2,254) 21,633 (1,518) Other financial liabilities measured on a recurring basis — — — — — — — — — — — (1) Net realized/unrealized gains (losses) are presented as increase (decrease) to Level 3 assets, and as (increase) decrease to Level 3 liabilities. Changes in fair value of available-for-sale investments are recorded in AOCI , unless related to credit impairment, while gains and losses from sales are recorded in Realized gains (losses) from sales of investments in the Consolidated Statement of Income. (2) Unrealized gains (losses) on MSRs are recorded in Other revenue in the Consolidated Statement of Income. (3) Represents the amount of total gains or losses for the period, included in earnings (and AOCI for changes in fair value of available-for-sale debt securities and DVA on fair value option liabilities), attributable to the change in fair value relating to assets and liabilities classified as Level 3 that are still held at June 30, 2020. (4) Total Level 3 derivative assets and liabilities have been netted in these tables for presentation purposes only. Net realized/unrealized gains (losses) incl. in (1) Transfers Unrealized (3) In millions of dollars Dec. 31, 2019 Principal Other (1)(2) into out of Purchases Issuances Sales Settlements Jun. 30, 2020 Assets Securities borrowed and purchased under agreements to resell $ 303 $ 14 $ — $ — $ — $ 108 $ — $ — $ (99) $ 326 $ 39 Trading non-derivative assets Trading mortgage-backed securities U.S. government-sponsored agency guaranteed 10 (74) — 16 (9) 208 — (55) — 96 5 Residential 123 6 — 204 (43) 274 — (131) — 433 — Commercial 61 4 — 143 (17) 89 — (63) — 217 (10) Total trading mortgage-backed securities $ 194 $ (64) $ — $ 363 $ (69) $ 571 $ — $ (249) $ — $ 746 $ (5) U.S. Treasury and federal agency securities $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — State and municipal 64 2 — 15 (3) 62 — (23) — 117 1 Foreign government 52 (28) — 2 (2) 104 — (102) — 26 52 Corporate 313 290 — 86 (70) 419 — (633) (6) 399 (87) Marketable equity securities 100 9 — 38 (3) 206 — (258) — 92 (19) Asset-backed securities 1,117 (102) — 496 (60) 740 — (466) — 1,785 (222) Other trading assets 555 220 — 181 (152) 231 14 (237) (15) 797 (23) Total trading non-derivative assets $ 2,455 $ 327 $ — $ 1,181 $ (359) $ 2,333 $ 14 $ (1,968) $ (21) $ 3,962 $ (303) Trading derivatives, net (4) Interest rate contracts $ 1 $ 375 $ — $ 1,614 $ (2) $ 2 $ 56 $ 13 $ (91) $ 1,968 $ 387 Foreign exchange contracts (5) (52) — (33) 11 49 — (13) 17 (26) 104 Equity contracts (1,596) (564) — (391) 236 24 — (6) 62 (2,235) (663) Commodity contracts (59) (206) — 37 (70) 66 — (44) (2) (278) (211) Credit derivatives (56) 579 — 171 (358) — — — 66 402 372 Total trading derivatives, net (4) $ (1,715) $ 132 $ — $ 1,398 $ (183) $ 141 $ 56 $ (50) $ 52 $ (169) $ (11) Investments Mortgage-backed securities U.S. government-sponsored agency guaranteed $ 32 $ — $ (5) $ 1 $ 1 $ 1 $ — $ — $ — $ 30 $ (23) Residential — — — — — — — — — — — Commercial — — — — — — — — — — — Total investment mortgage-backed securities $ 32 $ — $ (5) $ 1 $ 1 $ 1 $ — $ — $ — $ 30 $ (23) U.S. Treasury and federal agency securities $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — State and municipal 623 — (7) 310 (131) 95 — (65) — 825 25 Foreign government 96 — 5 27 (64) 208 — (76) — 196 (9) Corporate 45 — 2 49 (152) 162 — — — 106 — Marketable equity securities — — — 1 — — — — — 1 — Asset-backed securities 22 — 3 — — — — (19) — 6 34 Other debt securities — — — — — — — — — — — Non-marketable equity securities 441 — (53) — — 2 — (3) (55) 332 22 Total investments $ 1,259 $ — $ (55) $ 388 $ (346) $ 468 $ — $ (163) $ (55) $ 1,496 $ 49 Table continues on the next page. Net realized/unrealized gains (losses) incl. in (1) Transfers Unrealized (3) In millions of dollars Dec. 31, 2019 Principal Other (1)(2) into out of Purchases Issuances Sales Settlements Jun. 30, 2020 Loans $ 402 $ — $ 368 $ 217 $ (6) $ — $ — $ — $ (3) $ 978 $ 509 Mortgage servicing rights 495 — (169) — — — 56 — (37) 345 (147) Other financial assets measured on a recurring basis 1 — 14 — — — (6) (5) (4) — 16 Liabilities Interest-bearing deposits $ 215 $ — $ (11) $ 278 $ (151) $ — $ 30 $ — $ (146) $ 237 $ (6) Securities loaned and sold under agreements to repurchase 757 27 — — — — — — (105) 625 (33) Trading account liabilities Securities sold, not yet purchased 48 (129) — 117 (18) — 9 — (181) 104 (7) Other trading liabilities — — — — — — — — — — — Short-term borrowings 13 19 — 86 (6) — 61 — (7) 128 21 Long-term debt 17,169 (380) — 5,063 (4,168) — 6,788 — (3,600) 21,633 (746) Other financial liabilities measured on a recurring basis — — — — — — 2 — (2) — — (1) Net realized/unrealized gains (losses) are presented as increase (decrease) to Level 3 assets, and as (increase) decrease to Level 3 liabilities. Changes in fair value of available-for-sale debt securities are recorded in AOCI , unless related to credit impairment, while gains and losses from sales are recorded in Realized gains (losses) from sales of investments in the Consolidated Statement of Income. (2) Unrealized gains (losses) on MSRs are recorded in Other revenue in the Consolidated Statement of Income. (3) Represents the amount of total gains or losses for the period, included in earnings (and AOCI for changes in fair value of available-for-sale debt securities and DVA on fair value option liabilities), attributable to the change in fair value relating to assets and liabilities classified as Level 3 th

FAIR VALUE ELECTIONS

FAIR VALUE ELECTIONS	6 Months Ended
	Jun. 30, 2021
Fair Value, Option, Aggregate Differences [Abstract]
FAIR VALUE ELECTIONS	FAIR VALUE ELECTIONSThe Company may elect to report most financial instruments and certain other items at fair value on an instrument-by-instrument basis with changes in fair value reported in earnings, other than DVA (see below). The election is made upon the initial recognition of an eligible financial asset, financial liability or firm commitment or when certain specified reconsideration events occur. The fair value election may not otherwise be revoked once an election is made. The changes in fair value are recorded in current earnings. Movements in DVA are reported as a component of AOCI . Additional discussion regarding the applicable areas in which fair value elections were made is presented in Note 20 to the Consolidated Financial Statements. The Company has elected fair value accounting for its mortgage servicing rights (MSRs). See Note 18 to the Consolidated Financial Statements for additional details on Citi’s MSRs. The following table presents the changes in fair value of those items for which the fair value option has been elected: Changes in fair value—gains (losses) Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Assets Securities borrowed and purchased under agreements to resell $ (8) $ (48) $ (36) $ 44 Trading account assets 52 373 153 (461) Loans Certain corporate loans 539 (154) 668 (1,017) Certain consumer loans — (1) — — Total loans $ 539 $ (155) $ 668 $ (1,017) Other assets MSRs $ (21) $ (26) $ 52 $ (169) Certain mortgage loans HFS (1) 47 72 44 134 Total other assets $ 26 $ 46 $ 96 $ (35) Total assets $ 609 $ 216 $ 881 $ (1,469) Liabilities Interest-bearing deposits $ (130) $ (164) $ (93) $ (52) Securities loaned and sold under agreements to repurchase 5 196 18 (92) Trading account liabilities 8 44 10 (17) Short-term borrowings (2) 327 (259) 192 997 Long-term debt (2) (2,441) (5,402) (433) 1,963 Total liabilities $ (2,231) $ (5,585) $ (306) $ 2,799 (1) Includes gains (losses) associated with interest rate lock commitments for those loans that have been originated and elected under the fair value option. (2) Includes DVA that is included in AOCI . See Notes 17 and 20 to the Consolidated Financial Statements. Own Debt Valuation Adjustments (DVA) Own debt valuation adjustments are recognized on Citi’s liabilities for which the fair value option has been elected using Citi’s credit spreads observed in the bond market. Changes in fair value of fair value option liabilities related to changes in Citigroup’s own credit spreads (DVA) are reflected as a component of AOCI . Among other variables, the fair value of liabilities for which the fair value option has been elected (other than non-recourse debt and similar liabilities) is impacted by the narrowing or widening of the Company’s credit spreads. The estimated changes in the fair value of these non-derivative liabilities due to such changes in the Company’s own credit spread (or instrument-specific credit risk) were a loss of $110 million and a loss of $2,935 million for the three months ended June 30, 2021 and 2020, and a loss of $148 million and a gain of $1,253 million for the six months ended June 30, 2021 and 2020, respectively. Changes in fair value resulting from changes in instrument-specific credit risk were estimated by incorporating the Company’s current credit spreads observable in the bond market into the relevant valuation technique used to value each liability as described above. The Fair Value Option for Financial Assets and Financial Liabilities Selected Portfolios of Securities Purchased Under Agreements to Resell, Securities Borrowed, Securities Sold Under Agreements to Repurchase, Securities Loaned and Certain Uncollateralized Short-Term Borrowings The Company elected the fair value option for certain portfolios of fixed income securities purchased under agreements to resell and fixed income securities sold under agreements to repurchase, securities borrowed, securities loaned and certain uncollateralized short-term borrowings held primarily by broker-dealer entities in the United States, the United Kingdom and Japan. In each case, the election was made because the related interest rate risk is managed on a portfolio basis, primarily with offsetting derivative instruments that are accounted for at fair value through earnings. Changes in fair value for transactions in these portfolios are recorded in Principal transactions . The related interest revenue and interest expense are measured based on the contractual rates specified in the transactions and are reported as Interest revenue and Interest expense in the Consolidated Statement of Income. Certain Loans and Other Credit Products Citigroup has also elected the fair value option for certain other originated and purchased loans, including certain unfunded loan products, such as guarantees and letters of credit, executed by Citigroup’s lending and trading businesses. None of these credit products are highly leveraged financing commitments. Significant groups of transactions include loans and unfunded loan products that are expected to be either sold or securitized in the near term, or transactions where the economic risks are hedged with derivative instruments, such as purchased credit default swaps or total return swaps where the Company pays the total return on the underlying loans to a third party. Citigroup has elected the fair value option to mitigate accounting mismatches in cases where hedge accounting is complex and to achieve operational simplifications. Fair value was not elected for most lending transactions across the Company. The following table provides information about certain credit products carried at fair value: June 30, 2021 December 31, 2020 In millions of dollars Trading assets Loans Trading assets Loans Carrying amount reported on the Consolidated Balance Sheet $ 8,594 $ 7,707 $ 8,063 $ 6,854 Aggregate unpaid principal balance in excess of (less than) fair value (203) (197) (915) (14) Balance of non-accrual loans or loans more than 90 days past due — 17 — 4 Aggregate unpaid principal balance in excess of (less than) fair value for non-accrual loans or loans more than 90 days past due — (15) — — In addition to the amounts reported above, $763 million and $1,068 million of unfunded commitments related to certain credit products selected for fair value accounting were outstanding as of June 30, 2021 and December 31, 2020, respectively. Changes in the fair value of funded and unfunded credit products are classified in Principal transactions in Citi’s Consolidated Statement of Income. Related interest revenue is measured based on the contractual interest rates and reported as Interest revenue on Trading account assets or loan interest depending on the balance sheet classifications of the credit products. The changes in fair value for the six months ended June 30, 2021 and 2020 due to instrument-specific credit risk totaled to losses of $2 million and $40 million, respectively. Certain Investments in Unallocated Precious Metals Citigroup invests in unallocated precious metals accounts (gold, silver, platinum and palladium) as part of its commodity and foreign currency trading activities or to economically hedge certain exposures from issuing structured liabilities. Under ASC 815, the investment is bifurcated into a debt host contract and a commodity forward derivative instrument. Citigroup elects the fair value option for the debt host contract, and reports the debt host contract within Trading account assets on the Company’s Consolidated Balance Sheet. The total carrying amount of debt host contracts across unallocated precious metals accounts was approximately $0.4 billion and $0.5 billion at June 30, 2021 and December 31, 2020, respectively. The amounts are expected to fluctuate based on trading activity in future periods. As part of its commodity and foreign currency trading activities, Citi trades unallocated precious metals investments and executes forward purchase and forward sale derivative contracts with trading counterparties. When Citi sells an unallocated precious metals investment, Citi’s receivable from its depository bank is repaid and Citi derecognizes its investment in the unallocated precious metal. The forward purchase or sale contract with the trading counterparty indexed to unallocated precious metals is accounted for as a derivative, at fair value through earnings. As of June 30, 2021, there were approximately $5.0 billion and $5.0 billion of notional amounts of such forward purchase and forward sale derivative contracts outstanding, respectively. Certain Investments in Private Equity and Real Estate Ventures Citigroup invests in private equity and real estate ventures for the purpose of earning investment returns and for capital appreciation. The Company has elected the fair value option for certain of these ventures, because such investments are considered similar to many private equity or hedge fund activities in Citi’s investment companies, which are reported at fair value. The fair value option brings consistency in the accounting and evaluation of these investments. All investments (debt and equity) in such private equity and real estate entities are accounted for at fair value. These investments are classified as Investments on Citigroup’s Consolidated Balance Sheet. Changes in the fair values of these investments are classified in Other revenue in the Company’s Consolidated Statement of Income. Certain Mortgage Loans Held-for-Sale (HFS) Citigroup has elected the fair value option for certain purchased and originated prime fixed-rate and conforming adjustable-rate first mortgage loans HFS. These loans are intended for sale or securitization and are hedged with derivative instruments. The Company has elected the fair value option to mitigate accounting mismatches in cases where hedge accounting is complex and to achieve operational simplifications. The following table provides information about certain mortgage loans HFS carried at fair value: In millions of dollars June 30, December 31, 2020 Carrying amount reported on the Consolidated Balance Sheet $ 1,681 $ 1,742 Aggregate fair value in excess of (less than) unpaid principal balance 52 91 Balance of non-accrual loans or loans more than 90 days past due — — Aggregate unpaid principal balance in excess of fair value for non-accrual loans or loans more than 90 days past due — — The changes in the fair values of these mortgage loans are reported in Other revenue in the Company’s Consolidated Statement of Income. There was no net change in fair value during the six months ended June 30, 2021 and 2020 due to instrument-specific credit risk. Related interest income continues to be measured based on the contractual interest rates and reported as Interest revenue in the Consolidated Statement of Income. Certain Debt Liabilities The Company has elected the fair value option for certain debt liabilities. The Company elected the fair value option because these exposures are considered to be trading-related positions and, therefore, they are managed on a fair value basis. These positions will continue to be classified as debt, deposits or derivatives classified as Trading account liabilities on the Company’s Consolidated Balance Sheet according to their legal form. The following table provides information about the carrying value of notes carried at fair value, disaggregated by type of risk: In billions of dollars June 30, 2021 December 31, 2020 Interest rate linked $ 38.9 $ 34.5 Foreign exchange linked 0.6 1.2 Equity linked 31.3 27.3 Commodity linked 2.9 1.4 Credit linked 2.7 2.6 Total $ 76.4 $ 67.0 The portion of the changes in fair value attributable to changes in Citigroup’s own credit spreads (DVA) is reflected as a component of AOCI while all other changes in fair value are reported in Principal transactions . Changes in the fair value of these liabilities include accrued interest, which is also included in the change in fair value reported in Principal transactions . The following table provides information about long-term debt carried at fair value: In millions of dollars June 30, 2021 December 31, 2020 Carrying amount reported on the Consolidated Balance Sheet $ 76,375 $ 67,063 Aggregate unpaid principal balance in excess of (less than) fair value (4,638) (5,130) The following table provides information about short-term borrowings carried at fair value: In millions of dollars June 30, 2021 December 31, 2020 Carrying amount reported on the Consolidated Balance Sheet $ 7,358 $ 4,683 Aggregate unpaid principal balance in excess of (less than) fair value — 68

GUARANTEES, LEASES AND COMMITME

GUARANTEES, LEASES AND COMMITMENTS	6 Months Ended
	Jun. 30, 2021
Guarantees, Leases And Commitments [Abstract]
GUARANTEES, LEASES AND COMMITMENTS	GUARANTEES, LEASES AND COMMITMENTS Citi provides a variety of guarantees and indemnifications to its customers to enhance their credit standing and enable them to complete a wide variety of business transactions. For certain contracts meeting the definition of a guarantee, the guarantor must recognize, at inception, a liability for the fair value of the obligation undertaken in issuing the guarantee. In addition, the guarantor must disclose the maximum potential amount of future payments that the guarantor could be required to make under the guarantee, if there were a total default by the guaranteed parties. The determination of the maximum potential future payments is based on the notional amount of the guarantees without consideration of possible recoveries under recourse provisions or from collateral held or pledged. As such, Citi believes such amounts bear no relationship to the anticipated losses, if any, on these guarantees. For additional information regarding Citi’s guarantees and indemnifications included in the tables below, as well as its other guarantees and indemnifications excluded from these tables, see Note 26 to the Consolidated Financial Statements in Citi’s 2020 Annual Report on Form 10-K. The following tables present information about Citi’s guarantees at June 30, 2021 and December 31, 2020: Maximum potential amount of future payments In billions of dollars at June 30, 2021 Expire within Expire after Total amount Carrying value (in millions of dollars) Financial standby letters of credit $ 24.3 $ 68.2 $ 92.5 $ 882 Performance guarantees 6.8 5.9 12.7 48 Derivative instruments considered to be guarantees 16.1 58.5 74.6 304 Loans sold with recourse — 1.7 1.7 16 Securities lending indemnifications (1) 134.4 — 134.4 — Credit card merchant processing (2) 110.9 — 110.9 4 Credit card arrangements with partners — 0.8 0.8 7 Custody indemnifications and other — 24.2 24.2 37 Total $ 292.5 $ 159.3 $ 451.8 $ 1,298 Maximum potential amount of future payments In billions of dollars at December 31, 2020 Expire within Expire after Total amount Carrying value ( in millions of dollars) Financial standby letters of credit $ 25.3 $ 68.4 $ 93.7 $ 1,407 Performance guarantees 7.3 6.0 13.3 72 Derivative instruments considered to be guarantees 20.0 60.9 80.9 671 Loans sold with recourse — 1.2 1.2 9 Securities lending indemnifications (1) 112.2 — 112.2 — Credit card merchant processing (2) 101.9 — 101.9 3 Credit card arrangements with partners 0.2 0.8 1.0 7 Custody indemnifications and other — 37.3 37.3 35 Total $ 266.9 $ 174.6 $ 441.5 $ 2,204 (1) The carrying values of securities lending indemnifications were not material for either period presented, as the probability of potential liabilities arising from these guarantees is minimal. (2) At June 30, 2021 and December 31, 2020, this maximum potential exposure was estimated to be $111 billion and $102 billion, respectively. However, Citi believes that the maximum exposure is not representative of the actual potential loss exposure based on its historical experience. This contingent liability is unlikely to arise, as most products and services are delivered when purchased and amounts are refunded when items are returned to merchants. Loans Sold with Recourse Loans sold with recourse represent Citi’s obligations to reimburse the buyers for loan losses under certain circumstances. Recourse refers to the clause in a sales agreement under which a seller/lender will fully reimburse the buyer/investor for any losses resulting from the purchased loans. This may be accomplished by the sellers taking back any loans that become delinquent. In addition to the amounts shown in the tables above, Citi has recorded a repurchase reserve for its potential repurchases or make-whole liability regarding residential mortgage representation and warranty claims related to its whole loan sales to U.S. government-sponsored agencies and, to a lesser extent, private investors. The repurchase reserve was approximately $32 million and $31 million at June 30, 2021 and December 31, 2020, respectively, and these amounts are included in Other liabilities on the Consolidated Balance Sheet. Credit Card Arrangements with Partners Citi, in one of its credit card partner arrangements, provides guarantees to the partner regarding the volume of certain customer originations during the term of the agreement. To the extent that such origination targets are not met, the guarantees serve to compensate the partner for certain payments that otherwise would have been generated in connection with such originations. Other Guarantees and Indemnifications Credit Card Protection Programs Citi, through its credit card businesses, provides various cardholder protection programs on several of its card products, including programs that provide insurance coverage for rental cars, coverage for certain losses associated with purchased products, price protection for certain purchases and protection for lost luggage. These guarantees are not included in the table, since the total outstanding amount of the guarantees and Citi’s maximum exposure to loss cannot be quantified. The protection is limited to certain types of purchases and losses, and it is not possible to quantify the purchases that would qualify for these benefits at any given time. Citi assesses the probability and amount of its potential liability related to these programs based on the extent and nature of its historical loss experience. At June 30, 2021 and December 31, 2020, the actual and estimated losses incurred and the carrying value of Citi’s obligations related to these programs were immaterial. Value-Transfer Networks (Including Exchanges and Clearing Houses) (VTNs) Citi is a member of, or shareholder in, hundreds of value-transfer networks (VTNs) (payment, clearing and settlement systems as well as exchanges) around the world. As a condition of membership, many of these VTNs require that members stand ready to pay a pro rata share of the losses incurred by the organization due to another member’s default on its obligations. Citi’s potential obligations may be limited to its membership interests in the VTNs, contributions to the VTN’s funds, or, in certain narrow cases, to the full pro rata share. The maximum exposure is difficult to estimate as this would require an assessment of claims that have not yet occurred; however, Citi believes the risk of loss is remote given historical experience with the VTNs. Accordingly, Citi’s participation in VTNs is not reported in the guarantees tables above, and there are no amounts reflected on the Consolidated Balance Sheet as of June 30, 2021 or December 31, 2020 for potential obligations that could arise from Citi’s involvement with VTN associations. Long-Term Care Insurance Indemnification In 2000, Travelers Life & Annuity (Travelers), then a subsidiary of Citi, entered into a reinsurance agreement to transfer the risks and rewards of its long-term care (LTC) business to GE Life (now Genworth Financial Inc., or Genworth), then a subsidiary of the General Electric Company (GE). As part of this transaction, the reinsurance obligations were provided by two regulated insurance subsidiaries of GE Life, which funded two collateral trusts with securities. Presently, as discussed below, the trusts are referred to as the Genworth Trusts. As part of GE’s spin-off of Genworth in 2004, GE retained the risks and rewards associated with the 2000 Travelers reinsurance agreement by providing a reinsurance contract to Genworth through GE’s Union Fidelity Life Insurance Company (UFLIC) subsidiary that covers the Travelers LTC policies. In addition, GE provided a capital maintenance agreement in favor of UFLIC that is designed to assure that UFLIC will have the funds to pay its reinsurance obligations. As a result of these reinsurance agreements and the spin-off of Genworth, Genworth has reinsurance protection from UFLIC (supported by GE) and has reinsurance obligations in connection with the Travelers LTC policies. As noted below, the Genworth reinsurance obligations now benefit Brighthouse Financial, Inc. (Brighthouse). While neither Brighthouse nor Citi are direct beneficiaries of the capital maintenance agreement between GE and UFLIC, Brighthouse and Citi benefit indirectly from the existence of the capital maintenance agreement, which helps assure that UFLIC will continue to have funds necessary to pay its reinsurance obligations to Genworth. In connection with Citi’s 2005 sale of Travelers to MetLife Inc. (MetLife), Citi provided an indemnification to MetLife for losses (including policyholder claims) relating to the LTC business for the entire term of the Travelers LTC policies, which, as noted above, are reinsured by subsidiaries of Genworth. In 2017, MetLife spun off its retail insurance business to Brighthouse. As a result, the Travelers LTC policies now reside with Brighthouse. The original reinsurance agreement between Travelers (now Brighthouse) and Genworth remains in place and Brighthouse is the sole beneficiary of the Genworth Trusts. The Genworth Trusts are designed to provide collateral to Brighthouse in an amount equal to the statutory liabilities of Brighthouse in respect of the Travelers LTC policies. The assets in the Genworth Trusts are evaluated and adjusted periodically to ensure that the fair value of the assets continues to provide collateral in an amount equal to these estimated statutory liabilities, as the liabilities change over time. If both (i) Genworth fails to perform under the original Travelers/GE Life reinsurance agreement for any reason, including its insolvency or the failure of UFLIC to perform under its reinsurance contract or GE to perform under the capital maintenance agreement, and (ii) the assets of the two Genworth Trusts are insufficient or unavailable, then Citi, through its LTC reinsurance indemnification, must reimburse Brighthouse for any losses incurred in connection with the LTC policies. Since both events would have to occur before Citi would become responsible for any payment to Brighthouse pursuant to its indemnification obligation, and the likelihood of such events occurring is currently not probable, there is no liability reflected on the Consolidated Balance Sheet as of June 30, 2021 and December 31, 2020 related to this indemnification. However, if both events become reasonably possible (meaning more than remote but less than probable), Citi will be required to estimate and disclose a reasonably possible loss or range of loss to the extent that such an estimate could be made. In addition, if both events become probable, Citi will be required to accrue for such liability in accordance with applicable accounting principles. Citi continues to closely monitor its potential exposure under this indemnification obligation, given GE’s 2018 LTC and other charges and the September 2019 AM Best credit ratings downgrade for the Genworth subsidiaries. Futures and Over-the-Counter Derivatives Clearing Citi provides clearing services on central clearing parties (CCP) for clients that need to clear exchange-traded and over-the-counter (OTC) derivative contracts with CCPs. Based on all relevant facts and circumstances, Citi has concluded that it acts as an agent for accounting purposes in its role as clearing member for these client transactions. As such, Citi does not reflect the underlying exchange-traded or OTC derivatives contracts in its Consolidated Financial Statements. See Note 19 for a discussion of Citi’s derivatives activities that are reflected in its Consolidated Financial Statements. As a clearing member, Citi collects and remits cash and securities collateral (margin) between its clients and the respective CCP. In certain circumstances, Citi collects a higher amount of cash (or securities) from its clients than it needs to remit to the CCPs. This excess cash is then held at depository institutions such as banks or carry brokers. There are two types of margin: initial and variation. Where Citi obtains benefits from or controls cash initial margin (e.g., retains an interest spread), cash initial margin collected from clients and remitted to the CCP or depository institutions is reflected within Brokerage payables (payables to customers) and Brokerage receivables (receivables from brokers, dealers and clearing organizations) or Cash and due from banks , respectively. However, for exchange-traded and OTC-cleared derivative contracts where Citi does not obtain benefits from or control the client cash balances, the client cash initial margin collected from clients and remitted to the CCP or depository institutions is not reflected on Citi’s Consolidated Balance Sheet. These conditions are met when Citi has contractually agreed with the client that (i) Citi will pass through to the client all interest paid by the CCP or depository institutions on the cash initial margin, (ii) Citi will not utilize its right as a clearing member to transform cash margin into other assets, (iii) Citi does not guarantee and is not liable to the client for the performance of the CCP or the depository institution and (iv) the client cash balances are legally isolated from Citi’s bankruptcy estate. The total amount of cash initial margin collected and remitted in this manner was approximately $16.8 billion and $16.6 billion as of June 30, 2021 and December 31, 2020, respectively. Variation margin due from clients to the respective CCP, or from the CCP to clients, reflects changes in the value of the client’s derivative contracts for each trading day. As a clearing member, Citi is exposed to the risk of non-performance by clients (e.g., failure of a client to post variation margin to the CCP for negative changes in the value of the client’s derivative contracts). In the event of non-performance by a client, Citi would move to close out the client’s positions. The CCP would typically utilize initial margin posted by the client and held by the CCP, with any remaining shortfalls required to be paid by Citi as clearing member. Citi generally holds incremental cash or securities margin posted by the client, which would typically be expected to be sufficient to mitigate Citi’s credit risk in the event the client fails to perform. As required by ASC 860-30-25-5, securities collateral posted by clients is not recognized on Citi’s Consolidated Balance Sheet. Carrying Value—Guarantees and Indemnifications At June 30, 2021 and December 31, 2020, the total carrying amounts of the liabilities related to the guarantees and indemnifications included in the tables above amounted to approximately $1.3 billion and $2.2 billion, respectively. The carrying value of financial and performance guarantees is included in Other liabilities . For loans sold with recourse, the carrying value of the liability is included in Other liabilities . Collateral Cash collateral available to Citi to reimburse losses realized under these guarantees and indemnifications amounted to $64.6 billion and $51.6 billion at June 30, 2021 and December 31, 2020, respectively. Securities and other marketable assets held as collateral amounted to $94.1 billion and $80.1 billion at June 30, 2021 and December 31, 2020, respectively. The majority of collateral is held to reimburse losses realized under securities lending indemnifications. In addition, letters of credit in favor of Citi held as collateral amounted to $4.5 billion and $6.6 billion at June 30, 2021 and December 31, 2020, respectively. Other property may also be available to Citi to cover losses under certain guarantees and indemnifications; however, the value of such property has not been determined. Performance Risk Presented in the tables below are the maximum potential amounts of future payments that are classified based on internal and external credit ratings. The determination of the maximum potential future payments is based on the notional amount of the guarantees without consideration of possible recoveries under recourse provisions or from collateral held or pledged. As such, Citi believes such amounts bear no relationship to the anticipated losses, if any, on these guarantees. Maximum potential amount of future payments In billions of dollars at June 30, 2021 Investment Non-investment Not Total Financial standby letters of credit $ 77.7 $ 14.7 $ 0.1 $ 92.5 Performance guarantees 10.1 2.6 — 12.7 Derivative instruments deemed to be guarantees — — 74.6 74.6 Loans sold with recourse — — 1.7 1.7 Securities lending indemnifications — — 134.4 134.4 Credit card merchant processing — — 110.9 110.9 Credit card arrangements with partners — — 0.8 0.8 Custody indemnifications and other 11.6 12.6 — 24.2 Total $ 99.4 $ 29.9 $ 322.5 $ 451.8 Maximum potential amount of future payments In billions of dollars at December 31, 2020 Investment Non-investment Not Total Financial standby letters of credit $ 78.5 $ 14.6 $ 0.6 $ 93.7 Performance guarantees 9.8 3.0 0.5 13.3 Derivative instruments deemed to be guarantees — — 80.9 80.9 Loans sold with recourse — — 1.2 1.2 Securities lending indemnifications — — 112.2 112.2 Credit card merchant processing — — 101.9 101.9 Credit card arrangements with partners — — 1.0 1.0 Custody indemnifications and other 24.9 12.4 — 37.3 Total $ 113.2 $ 30.0 $ 298.3 $ 441.5 Leases The Company’s operating leases, where Citi is a lessee, include real estate such as office space and branches and various types of equipment. These leases have a weighted-average remaining lease term of approximately six years as of June 30, 2021. The operating lease ROU asset and lease liability were $2.8 billion and $3.0 billion, respectively, as of June 30, 2021, compared to an operating lease ROU asset of $2.8 billion and lease liability of $3.1 billion as of December 31, 2020. The Company recognizes fixed lease costs on a straight-line basis throughout the lease term in the Consolidated Statement of Income. In addition, variable lease costs are recognized in the period in which the obligation for those payments is incurred. Credit Commitments and Lines of Credit The table below summarizes Citigroup’s credit commitments: In millions of dollars U.S. Outside of June 30, December 31, Commercial and similar letters of credit $ 929 $ 4,840 $ 5,769 $ 5,221 One- to four-family residential mortgages 1,823 2,520 4,343 5,002 Revolving open-end loans secured by one- to four-family residential properties 7,687 1,154 8,841 9,626 Commercial real estate, construction and land development 14,959 1,507 16,466 12,867 Credit card lines 605,944 102,007 707,951 710,399 Commercial and other consumer loan commitments 214,023 120,988 335,011 322,458 Other commitments and contingencies 5,278 524 5,802 5,715 Total $ 850,643 $ 233,540 $ 1,084,183 $ 1,071,288 The majority of unused commitments are contingent upon customers maintaining specific credit standards. Commercial commitments generally have floating interest rates and fixed expiration dates and may require payment of fees. Such fees (net of certain direct costs) are deferred and, upon exercise of the commitment, amortized over the life of the loan or, if exercise is deemed remote, amortized over the commitment period. Other Commitments and Contingencies Other commitments and contingencies include all other transactions related to commitments and contingencies not reported on the lines above. Unsettled Reverse Repurchase and Securities Borrowing Agreements and Unsettled Repurchase and Securities Lending Agreements In addition, in the normal course of business, Citigroup enters into reverse repurchase and securities borrowing agreements, as well as repurchase and securities lending agreements, which settle at a future date. At June 30, 2021 and December 31, 2020, Citigroup had approximately $92.4 billion and $71.8 billion of unsettled reverse repurchase and securities borrowing agreements, and approximately $38.2 billion and $62.5 billion of unsettled repurchase and securities lending agreements, respectively. For a further discussion of securities purchased under agreements to resell and securities borrowed, and securities sold under agreements to repurchase and securities loaned, including the Company’s policy for offsetting repurchase and reverse repurchase agreements, see Note 10 to the Consolidated Financial Statements. Restricted Cash Citigroup defines restricted cash (as cash subject to withdrawal restrictions) to include cash deposited with central banks that must be maintained to meet minimum regulatory requirements, and cash set aside for the benefit of customers or for other purposes such as compensating balance arrangements or debt retirement. Restricted cash includes minimum reserve requirements with the Federal Reserve Bank and certain other central banks and cash segregated to satisfy rules regarding the protection of customer assets as required by Citigroup broker-dealers’ primary regulators, including the United States Securities and Exchange Commission (SEC), the Commodity Futures Trading Commission and the United Kingdom’s Prudential Regulation Authority. Restricted cash is included on the Consolidated Balance Sheet within the following balance sheet lines: In millions of dollars June 30, December 31, Cash and due from banks $ 4,001 $ 3,774 Deposits with banks, net of allowance 13,750 14,203 Total $ 17,751 $ 17,977 In response to the COVID-19 pandemic, the Federal Reserve Bank and certain other central banks eased regulations related to minimum required cash deposited with central banks.

CONTINGENCIES

CONTINGENCIES	6 Months Ended
	Jun. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
CONTINGENCIES	CONTINGENCIES The following information supplements and amends, as applicable, the disclosure in Note 23 to the Consolidated Financial Statements in Citi’s First Quarter of 2021 Form 10-Q and Note 27 to the Consolidated Financial Statements in Citi’s 2020 Annual Report on Form 10-K. For purposes of this Note, Citigroup, its affiliates and subsidiaries and current and former officers, directors, and employees, are sometimes collectively referred to as Citigroup and Related Parties. In accordance with ASC 450, Citigroup establishes accruals for contingencies, including any litigation, regulatory, or tax matters disclosed herein, when Citigroup believes it is probable that a loss has been incurred and the amount of the loss can be reasonably estimated. Once established, accruals are adjusted from time to time, as appropriate, in light of additional information. The amount of loss ultimately incurred in relation to those matters may be substantially higher or lower than the amounts accrued for those matters. If Citigroup has not accrued for a matter because the matter does not meet the criteria for accrual (as set forth above), or Citigroup believes an exposure to loss exists in excess of the amount accrued for a particular matter, in each case assuming a material loss is reasonably possible but not probable, Citigroup discloses the matter. In addition, for such matters, Citigroup discloses an estimate of the aggregate reasonably possible loss or range of loss in excess of the amounts accrued for those matters for which an estimate can be made. At June 30, 2021, Citigroup estimates that the reasonably possible unaccrued loss for these matters ranges up to approximately $1.4 billion in the aggregate. As available information changes, the matters for which Citigroup is able to estimate will change, and the estimates themselves will change. In addition, while many estimates presented in financial statements and other financial disclosures involve significant judgment and may be subject to significant uncertainty, estimates of the range of reasonably possible loss arising from litigation, regulatory, tax, or other matters are subject to particular uncertainties. For example, at the time of making an estimate, Citigroup may only have preliminary or incomplete information about the facts underlying the claim; its assumptions about the future rulings of the court or other tribunal on significant issues, or the behavior and incentives of adverse parties, regulators, or tax authorities may prove to be wrong; and the outcomes it is attempting to predict are often not amenable to the use of statistical or other quantitative analytical tools. In addition, from time to time an outcome may occur that Citigroup had not accounted for in its estimates because it had deemed such an outcome to be remote. For all these reasons, the amount of loss in excess of accruals ultimately incurred for the matters as to which an estimate has been made could be substantially higher or lower than the range of loss included in the estimate. Subject to the foregoing, it is the opinion of Citigroup’s management, based on current knowledge and after taking into account its current accruals, that the eventual outcome of all matters described in this Note would not be likely to have a material adverse effect on the consolidated financial condition of Citigroup. Nonetheless, given the substantial or indeterminate amounts sought in certain of these matters and the inherent unpredictability of such matters, an adverse outcome in certain of these matters could, from time to time, have a material adverse effect on Citigroup’s consolidated results of operations or cash flows in particular quarterly or annual periods. For further information on ASC 450 and Citigroup’s accounting and disclosure framework for contingencies, including for any litigation, regulatory, and tax matters disclosed herein, see Note 27 to the Consolidated Financial Statements in Citi’s 2020 Annual Report on Form 10-K. Foreign Exchange Matters Antitrust and Other Litigation : On May 21, 2021, in ALLIANZ GLOBAL INVESTORS GMBH AND OTHERS v. BARCLAYS BANK PLC AND OTHERS, Citigroup, Citibank, and other defendants filed amended defenses. Additional information concerning this action is publicly available in court filings under the docket number CL-2018-000840. Interbank Offered Rates–Related Litigation and Other Matters Antitrust and Other Litigation : On March 24, 2021, in IN RE ICE LIBOR ANTITRUST LITIGATION, the United States Court of Appeals for the Second Circuit granted DYJ Holdings, LLC’s motion to intervene as a plaintiff and denied defendants’ motion to dismiss for lack of subject matter jurisdiction. Additional information concerning this action is publicly available in court filings under the docket number 19 Civ. 439 (S.D.N.Y.) (Daniels, J.) and 20-1492 (2d Cir.). On May 24, 2021, in MCCARTHY, ET AL. v. INTERCONTINENTAL EXCHANGE, INC., ET AL., plaintiffs filed a motion for an order to show cause why an injunction should not issue in connection with the LIBOR setting process. On June 3, 2021, the court issued an order denying defendants’ motion to transfer the case to the United States District Court for the Southern District of New York. Additional information concerning this action is publicly available in court filings under the docket number 20 Civ. 5832 (N.D. Cal.) (Donato, J.). Revlon-related Wire Transfer Litigation On May 12, 2021, the district court denied Citibank’s motion to extend the temporary restraining orders pending appeal but extended the temporary restraining orders to allow for Citibank to file a motion for an injunction with the United States Court of Appeals for the Second Circuit, which Citibank did on May 19, 2021. Additional information concerning this action is publicly available in court filings under docket numbers 20-CV-6539 (S.D.N.Y.) (Furman, J.) and 21-487 (2d Cir.). Shareholder Derivative and Securities Litigation On June 4, 2021, defendants moved to dismiss the consolidated amended complaint, in IN RE CITIGROUP SECURITIES LITIGATION. Additional information concerning this action is publicly available in court filings under the docket number 1:20-CV-9132 (S.D.N.Y.) (Nathan, J.). Sovereign Securities Matters Antitrust and Other Litigation : On May 14, 2021, in IN RE TREASURY SECURITIES AUCTION ANTITRUST LITIGATION, plaintiffs filed an amended consolidated complaint. On June 14, 2021, certain defendants, including Citigroup Global Markets Inc., moved to dismiss the amended complaint. Additional information concerning this action is publicly available in court filings under the docket number 15-MD-2673 (S.D.N.Y.) (Gardephe, J.). On April 21, 2021, in STATE OF LOUISIANA v. BANK OF AMERICA, N.A., ET AL., CITY OF BATON ROUGE, ET AL. v. BANK OF AMERICA, N.A., ET AL., LOUISIANA ASSET MANAGEMENT POOL v. BANK OF AMERICA CORPORATION, ET AL., and CITY OF NEW ORLEANS, ET AL. v. BANK OF AMERICA CORPORATION, ET AL., plaintiffs filed notices of settlement, and on June 9, 2021, the parties filed stipulations of dismissal and the court dismissed the actions with prejudice. Additional information concerning these actions is publicly available in court filings under the docket numbers 19 Civ. 638 (M.D. La.) (Dick, C.J.), 19 Civ. 725 (M.D. La.) (Dick, C.J.), 21 Civ. 0003 (M.D. La.) (Dick, C.J.), and 21 Civ. 147 (M.D. La.) (Dick, C.J.). On May 20, 2021, in IN RE MEXICAN GOVERNMENT BONDS ANTITRUST LITIGATION, plaintiffs moved for reconsideration of the court’s order granting defendants’ motion to dismiss for lack of personal jurisdiction. Additional information concerning this action is publicly available in court filings under the docket number 18 Civ. 2830 (S.D.N.Y.) (Oetken, J.). Variable Rate Demand Obligation Litigations On June 2, 2021, the Board of Directors of the San Diego Association of Governments, acting as the San Diego County Regional Transportation Commission, filed a putative class action similar to and against the same defendants named in the already pending nationwide consolidated class action captioned CITY OF PHILADELPHIA v. BANK OF AMERICA CORP., ET AL. and MAYOR AND CITY COUNCIL OF BALTIMORE v. BANK OF AMERICA CORP., ET AL. Additional information concerning these actions is publicly available in court filings under the docket numbers 21-CV-4893 (S.D.N.Y.) (Furman, J.), 19-CV-1608 (S.D.N.Y.) (Furman, J.), and 19-CV-2667 (S.D.N.Y.) (Furman, J.). Wind Farm Litigations On April 8, 2021, the motion for a preliminary injunction filed by the Stephens Ranch plaintiffs was denied. On April 19, 2021, plaintiffs filed a notice of appeal of that decision. On May 20, 2021, temporary injunction motions were denied in the actions commenced by the Shannon, Flat Top, and Midway projects, and on June 29, 2021, defendants filed motions to dismiss the complaints. Additional information concerning these actions is publicly available in court filings under docket numbers 652078/2021 (Sup. Ct. N.Y. Cnty.) (Reed, J.), 2021-01387 (1st Dep’t), 652312/2021 (Sup. Ct. N.Y. Cnty.) (Reed, J.), and 2021-23588 (District Court Harris County TX) (Schaffer, J.). Settlement Payments Payments required in settlement agreements described above have been made or are covered by existing litigation or other accruals.

CONDENSED CONSOLIDATING FINANCI

CONDENSED CONSOLIDATING FINANCIAL STATEMENTS	6 Months Ended
	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
CONDENSED CONSOLIDATING FINANCIAL STATEMENTS	CONDENSED CONSOLIDATING FINANCIAL STATEMENTS Citigroup previously amended its Registration Statement on Form S-3 on file with the SEC (File No. 33-192302), which added its wholly owned subsidiary, Citigroup Global Markets Holdings Inc. (CGMHI), as a co-registrant. Any securities issued by CGMHI under the Form S-3 will be fully and unconditionally guaranteed by Citigroup. The following are the Condensed Consolidating Statements of Income and Comprehensive Income for the three and six months ended June 30, 2021 and 2020, Condensed Consolidating Balance Sheet as of June 30, 2021 and December 31, 2020 and Condensed Consolidating Statement of Cash Flows for the six months ended June 30, 2021 and 2020 for Citigroup Inc., the parent holding company (Citigroup parent company), CGMHI, other Citigroup subsidiaries and eliminations and total consolidating adjustments. “Other Citigroup subsidiaries and eliminations” includes all other subsidiaries of Citigroup, intercompany eliminations and income (loss) from discontinued operations. “Consolidating adjustments” includes Citigroup parent company elimination of distributed and undistributed income of subsidiaries and investment in subsidiaries. These Condensed Consolidating Financial Statements have been prepared and presented in accordance with SEC Regulation S-X Rule 3-10, “Financial Statements of Guarantors and Issuers of Guaranteed Securities Registered or Being Registered.” These Condensed Consolidating Financial Statements are presented for purposes of additional analysis, but should be considered in relation to the Consolidated Financial Statements of Citigroup taken as a whole. Condensed Consolidating Statements of Income and Comprehensive Income Three Months Ended June 30, 2021 In millions of dollars Citigroup parent company CGMHI Other Citigroup subsidiaries and eliminations Consolidating adjustments Citigroup consolidated Revenues Dividends from subsidiaries $ 3,700 $ — $ — $ (3,700) $ — Interest revenue — 1,014 11,449 — 12,463 Interest revenue—intercompany 954 136 (1,090) — — Interest expense 1,209 221 834 — 2,264 Interest expense—intercompany 94 330 (424) — — Net interest revenue $ (349) $ 599 $ 9,949 $ — $ 10,199 Commissions and fees $ — $ 1,836 $ 1,538 $ — $ 3,374 Commissions and fees—intercompany (1) 88 (87) — — Principal transactions (892) 919 2,277 — 2,304 Principal transactions—intercompany 910 (110) (800) — — Other revenue (4) 139 1,462 — 1,597 Other revenue—intercompany 3 (8) 5 — — Total non-interest revenues $ 16 $ 2,864 $ 4,395 $ — $ 7,275 Total revenues, net of interest expense $ 3,367 $ 3,463 $ 14,344 $ (3,700) $ 17,474 Provisions for credit losses and for benefits and claims $ 2 $ 3 $ (1,071) $ — $ (1,066) Operating expenses Compensation and benefits $ — $ 1,303 $ 4,679 $ — $ 5,982 Compensation and benefits—intercompany 24 — (24) — — Other operating 14 680 4,516 — 5,210 Other operating—intercompany 3 808 (811) — — Total operating expenses $ 41 $ 2,791 $ 8,360 $ — $ 11,192 Equity in undistributed income of subsidiaries $ 2,567 $ — $ — $ (2,567) $ — Income (loss) from continuing operations before income taxes $ 5,891 $ 669 $ 7,055 $ (6,267) $ 7,348 Provision (benefit) for income taxes (302) (119) 1,576 — 1,155 Income (loss) from continuing operations $ 6,193 $ 788 $ 5,479 $ (6,267) $ 6,193 Income (loss) from discontinued operations, net of taxes — — 10 — 10 Net income before attribution of noncontrolling interests $ 6,193 $ 788 $ 5,489 $ (6,267) $ 6,203 Noncontrolling interests — — 10 — 10 Net income (loss) $ 6,193 $ 788 $ 5,479 $ (6,267) $ 6,193 Comprehensive income Add: Other comprehensive income (loss) $ (109) $ 7 $ (1,966) $ 1,959 $ (109) Total Citigroup comprehensive income (loss) $ 6,084 $ 795 $ 3,513 $ (4,308) $ 6,084 Add: Other comprehensive income attributable to noncontrolling interests $ — $ — $ 18 $ — $ 18 Add: Net income attributable to noncontrolling interests — — 10 — 10 Total comprehensive income (loss) $ 6,084 $ 795 $ 3,541 $ (4,308) $ 6,112 Condensed Consolidating Statements of Income and Comprehensive Income Six Months Ended June 30, 2021 In millions of dollars Citigroup parent company CGMHI Other Citigroup subsidiaries and eliminations Consolidating adjustments Citigroup consolidated Revenues Dividends from subsidiaries $ 3,800 $ — $ — $ (3,800) $ — Interest revenue — 1,985 23,012 — 24,997 Interest revenue—intercompany 1,912 281 (2,193) — — Interest expense 2,421 444 1,767 — 4,632 Interest expense—intercompany 178 659 (837) — — Net interest revenue $ (687) $ 1,163 $ 19,889 $ — $ 20,365 Commissions and fees $ — $ 3,997 $ 3,047 $ — $ 7,044 Commissions and fees—intercompany (27) 135 (108) — — Principal transactions 877 6,577 (1,237) — 6,217 Principal transactions—intercompany (968) (4,348) 5,316 — — Other revenue 51 242 2,882 — 3,175 Other revenue—intercompany (61) (28) 89 — — Total non-interest revenues $ (128) $ 6,575 $ 9,989 $ — $ 16,436 Total revenues, net of interest expense $ 2,985 $ 7,738 $ 29,878 $ (3,800) $ 36,801 Provisions for credit losses and for benefits and claims $ 2 $ 7 $ (3,130) $ — $ (3,121) Operating expenses Compensation and benefits $ 28 $ 2,637 $ 9,318 $ — $ 11,983 Compensation and benefits—intercompany 48 — (48) — — Other operating 25 1,322 8,935 — 10,282 Other operating—intercompany 6 1,488 (1,494) — — Total operating expenses $ 107 $ 5,447 $ 16,711 $ — $ 22,265 Equity in undistributed income of subsidiaries $ 10,740 $ — $ — $ (10,740) $ — Income (loss) from continuing operations before income taxes $ 13,616 $ 2,284 $ 16,297 $ (14,540) $ 17,657 Provision (benefit) for income taxes (519) 333 3,673 — 3,487 Income (loss) from continuing operations $ 14,135 $ 1,951 $ 12,624 $ (14,540) $ 14,170 Income (loss) from discontinued operations, net of taxes — — 8 — 8 Net income before attribution of noncontrolling interests $ 14,135 $ 1,951 $ 12,632 $ (14,540) $ 14,178 Noncontrolling interests — — 43 — 43 Net income (loss) $ 14,135 $ 1,951 $ 12,589 $ (14,540) $ 14,135 Comprehensive income Add: Other comprehensive income (loss) $ (3,062) $ (43) $ (1,429) $ 1,472 $ (3,062) Total Citigroup comprehensive income (loss) $ 11,073 $ 1,908 $ 11,160 $ (13,068) $ 11,073 Add: Other comprehensive income attributable to noncontrolling interests $ — $ — $ (40) $ — $ (40) Add: Net income attributable to noncontrolling interests — — 43 — 43 Total comprehensive income (loss) $ 11,073 $ 1,908 $ 11,163 $ (13,068) $ 11,076 Condensed Consolidating Statements of Income and Comprehensive Income Three Months Ended June 30, 2020 In millions of dollars Citigroup parent company CGMHI Other Citigroup subsidiaries and eliminations Consolidating adjustments Citigroup consolidated Revenues Dividends from subsidiaries $ — $ — $ — $ — $ — Interest revenue — 1,309 13,280 — 14,589 Interest revenue—intercompany 1,067 282 (1,349) — — Interest expense 1,265 380 1,864 — 3,509 Interest expense—intercompany 142 621 (763) — — Net interest revenue $ (340) $ 590 $ 10,830 $ — $ 11,080 Commissions and fees $ — $ 1,771 $ 1,162 $ — $ 2,933 Commissions and fees—intercompany — 73 (73) — — Principal transactions (258) (2,993) 7,408 — 4,157 Principal transactions—intercompany 62 4,890 (4,952) — — Other revenue (14) 211 1,399 — 1,596 Other revenue—intercompany 8 13 (21) — — Total non-interest revenues $ (202) $ 3,965 $ 4,923 $ — $ 8,686 Total revenues, net of interest expense $ (542) $ 4,555 $ 15,753 $ — $ 19,766 Provisions for credit losses and for benefits and claims $ — $ 1 $ 8,196 $ — $ 8,197 Operating expenses Compensation and benefits $ 105 $ 1,345 $ 4,174 $ — $ 5,624 Compensation and benefits—intercompany 1 — (1) — — Other operating 9 594 4,233 — 4,836 Other operating—intercompany 4 375 (379) — — Total operating expenses $ 119 $ 2,314 $ 8,027 $ — $ 10,460 Equity in undistributed income of subsidiaries $ 1,847 $ — $ — $ (1,847) $ — Income (loss) from continuing operations before income $ 1,186 $ 2,240 $ (470) $ (1,847) $ 1,109 Provision (benefit) for income taxes 130 715 (793) — 52 Income (loss) from continuing operations $ 1,056 $ 1,525 $ 323 $ (1,847) $ 1,057 Income (loss) from discontinued operations, net of taxes — — (1) — (1) Net income (loss) before attribution of noncontrolling interests $ 1,056 $ 1,525 $ 322 $ (1,847) $ 1,056 Noncontrolling interests — — — — — Net income (loss) $ 1,056 $ 1,525 $ 322 $ (1,847) $ 1,056 Comprehensive income Add: Other comprehensive income (loss) $ (824) $ (1,429) $ (1,223) $ 2,652 $ (824) Total Citigroup comprehensive income (loss) $ 232 $ 96 $ (901) $ 805 $ 232 Add: Other comprehensive income attributable to noncontrolling interests $ — $ — $ 39 $ — $ 39 Add: Net income attributable to noncontrolling interests — — — — — Total comprehensive income (loss) $ 232 $ 96 $ (862) $ 805 $ 271 Condensed Consolidating Statements of Income and Comprehensive Income Six Months Ended June 30, 2020 In millions of dollars Citigroup parent company CGMHI Other Citigroup subsidiaries and eliminations Consolidating adjustments Citigroup consolidated Revenues Dividends from subsidiaries $ 105 $ — $ — $ (105) $ — Interest revenue — 3,212 28,516 — 31,728 Interest revenue—intercompany 2,211 623 (2,834) — — Interest expense 2,408 1,521 5,227 — 9,156 Interest expense—intercompany 390 1,403 (1,793) — — Net interest revenue $ (587) $ 911 $ 22,248 $ — $ 22,572 Commissions and fees $ — $ 3,321 $ 2,633 $ — $ 5,954 Commissions and fees—intercompany (19) 237 (218) — — Principal transactions (930) 3,261 7,087 — 9,418 Principal transactions—intercompany 564 499 (1,063) — — Other revenue 66 260 2,227 — 2,553 Other revenue—intercompany (62) 26 36 — — Total non-interest revenues $ (381) $ 7,604 $ 10,702 $ — $ 17,925 Total revenues, net of interest expense $ (863) $ 8,515 $ 32,950 $ (105) $ 40,497 Provisions for credit losses and for benefits and claims $ — $ — $ 15,157 $ — $ 15,157 Operating expenses Compensation and benefits $ 133 $ 2,641 $ 8,504 $ — $ 11,278 Compensation and benefits—intercompany 75 — (75) — — Other operating 32 1,192 8,601 — 9,825 Other operating—intercompany 8 857 (865) — — Total operating expenses $ 248 $ 4,690 $ 16,165 $ — $ 21,103 Equity in undistributed income of subsidiaries $ 4,229 $ — $ — $ (4,229) $ — Income (loss) from continuing operations before income $ 3,118 $ 3,825 $ 1,628 $ (4,334) $ 4,237 Provision (benefit) for income taxes (474) 1,052 54 — 632 Income (loss) from continuing operations $ 3,592 $ 2,773 $ 1,574 $ (4,334) $ 3,605 Income (loss) from discontinued operations, net of taxes — — (19) — (19) Net income (loss) before attribution of noncontrolling interests $ 3,592 $ 2,773 $ 1,555 $ (4,334) $ 3,586 Noncontrolling interests — — (6) — (6) Net income (loss) $ 3,592 $ 2,773 $ 1,561 $ (4,334) $ 3,592 Comprehensive income Add: Other comprehensive income (loss) $ 2,973 $ 328 $ 12,236 $ (12,564) $ 2,973 Total Citigroup comprehensive income (loss) $ 6,565 $ 3,101 $ 13,797 $ (16,898) $ 6,565 Add: Other comprehensive income attributable to noncontrolling interests $ — $ — $ (12) $ — $ (12) Add: Net income attributable to noncontrolling interests — — (6) — (6) Total comprehensive income (loss) $ 6,565 $ 3,101 $ 13,779 $ (16,898) $ 6,547 Condensed Consolidating Balance Sheet June 30, 2021 In millions of dollars Citigroup parent company CGMHI Other Citigroup subsidiaries and eliminations Consolidating adjustments Citigroup consolidated Assets Cash and due from banks $ — $ 723 $ 26,394 $ — $ 27,117 Cash and due from banks—intercompany 16 5,919 (5,935) — — Deposits with banks, net of allowance — 7,398 264,723 — 272,121 Deposits with banks—intercompany 3,000 8,915 (11,915) — — Securities borrowed and purchased under resale agreements — 251,864 57,183 — 309,047 Securities borrowed and purchased under resale agreements—intercompany — 25,247 (25,247) — — Trading account assets 264 222,808 147,878 — 370,950 Trading account assets—intercompany 1,069 9,759 (10,828) — — Investments, net of allowance 1 265 486,797 — 487,063 Loans, net of unearned income — 3,135 673,699 — 676,834 Loans, net of unearned income—intercompany — — — — — Allowance for credit losses on loans (ACLL) — — (19,238) — (19,238) Total loans, net $ — $ 3,135 $ 654,461 $ — $ 657,596 Advances to subsidiaries $ 153,845 $ — $ (153,845) $ — $ — Investments in subsidiaries 220,810 — — (220,810) — Other assets, net of allowance (1) 11,302 74,398 118,274 — 203,974 Other assets—intercompany 3,354 58,861 (62,215) — — Total assets $ 393,661 $ 669,292 $ 1,485,725 $ (220,810) $ 2,327,868 Liabilities and equity Deposits $ — $ — $ 1,310,281 $ — $ 1,310,281 Deposits—intercompany — — — — — Securities loaned and sold under repurchase agreements — 203,715 18,102 — 221,817 Securities loaned and sold under repurchase agreements—intercompany — 48,508 (48,508) — — Trading account liabilities 19 125,785 48,902 — 174,706 Trading account liabilities—intercompany 564 8,578 (9,142) — — Short-term borrowings — 15,681 15,781 — 31,462 Short-term borrowings—intercompany — 18,337 (18,337) — — Long-term debt 174,366 56,087 34,122 — 264,575 Long-term debt—intercompany — 77,668 (77,668) — — Advances from subsidiaries 13,747 — (13,747) — — Other liabilities, including allowance 2,806 61,526 57,785 — 122,117 Other liabilities—intercompany — 16,004 (16,004) — — Stockholders’ equity 202,159 37,403 184,158 (220,810) 202,910 Total liabilities and equity $ 393,661 $ 669,292 $ 1,485,725 $ (220,810) $ 2,327,868 (1) Other assets for Citigroup parent company at June 30, 2021 included $42.0 billion of placements to Citibank and its branches, of which $31.8 billion had a remaining term of less than 30 days. Condensed Consolidating Balance Sheet December 31, 2020 In millions of dollars Citigroup parent company CGMHI Other Citigroup subsidiaries and eliminations Consolidating adjustments Citigroup consolidated Assets Cash and due from banks $ — $ 628 $ 25,721 $ — $ 26,349 Cash and due from banks—intercompany 16 6,081 (6,097) — — Deposits with banks, net of allowance — 5,224 278,042 — 283,266 Deposits with banks—intercompany 4,500 8,179 (12,679) — — Securities borrowed and purchased under resale agreements — 238,718 55,994 — 294,712 Securities borrowed and purchased under resale agreements—intercompany — 24,309 (24,309) — — Trading account assets 307 222,278 152,494 — 375,079 Trading account assets—intercompany 723 9,400 (10,123) — — Investments, net of allowance 1 374 446,984 — 447,359 Loans, net of unearned income — 2,524 673,359 — 675,883 Loans, net of unearned income—intercompany — — — — — Allowance for credit losses on loans (ACLL) — — (24,956) — (24,956) Total loans, net $ — $ 2,524 $ 648,403 $ — $ 650,927 Advances to subsidiaries $ 152,383 $ — $ (152,383) $ — $ — Investments in subsidiaries 213,267 — — (213,267) — Other assets, net of allowance (1) 12,156 60,273 109,969 — 182,398 Other assets—intercompany 2,781 51,489 (54,270) — — Total assets $ 386,134 $ 629,477 $ 1,457,746 $ (213,267) $ 2,260,090 Liabilities and equity Deposits $ — $ — $ 1,280,671 $ — $ 1,280,671 Deposits—intercompany — — — — — Securities loaned and sold under repurchase agreements — 184,786 14,739 — 199,525 Securities loaned and sold under repurchase agreements—intercompany — 76,590 (76,590) — — Trading account liabilities — 113,100 54,927 — 168,027 Trading account liabilities—intercompany 397 8,591 (8,988) — — Short-term borrowings — 12,323 17,191 — 29,514 Short-term borrowings—intercompany — 12,757 (12,757) — — Long-term debt 170,563 47,732 53,391 — 271,686 Long-term debt—intercompany — 67,322 (67,322) — — Advances from subsidiaries 12,975 — (12,975) — — Other liabilities, including allowance 2,692 55,217 52,558 — 110,467 Other liabilities—intercompany 65 15,378 (15,443) — — Stockholders’ equity 199,442 35,681 178,344 (213,267) 200,200 Total liabilities and equity $ 386,134 $ 629,477 $ 1,457,746 $ (213,267) $ 2,260,090 (1) Other assets for Citigroup parent company at December 31, 2020 included $29.5 billion of placements to Citibank and its branches, of which $24.3 billion had a remaining term of less than 30 days. Condensed Consolidating Statement of Cash Flows Six Months Ended June 30, 2021 In millions of dollars Citigroup parent company CGMHI Other Citigroup subsidiaries and eliminations Consolidating adjustments Citigroup consolidated Net cash provided by operating activities of continuing operations $ 1,429 $ 5,912 $ 16,222 $ — $ 23,563 Cash flows from investing activities of continuing operations Purchases of investments $ — $ — $ (201,567) $ — $ (201,567) Proceeds from sales of investments — — 66,477 — 66,477 Proceeds from maturities of investments — — 75,195 — 75,195 Change in loans — — (3,088) — (3,088) Proceeds from sales and securitizations of loans — — 869 — 869 Change in securities borrowed and purchased under agreements to resell — (14,084) (251) — (14,335) Changes in investments and advances—intercompany (2,424) (7,360) 9,784 — — Other investing activities — (15) (1,647) — (1,662) Net cash used in investing activities of continuing operations $ (2,424) $ (21,459) $ (54,228) $ — $ (78,111) Cash flows from financing activities of continuing operations Dividends paid $ (2,663) $ (187) $ 187 $ — $ (2,663) Issuance of preferred stock 2,300 — — — 2,300 Redemption of preferred stock (3,785) — — — (3,785) Treasury stock acquired (4,381) — — — (4,381) Proceeds (repayments) from issuance of long-term debt, net 7,576 8,446 (16,405) — (383) Proceeds (repayments) from issuance of long-term debt—intercompany, net — 11,040 (11,040) — — Change in deposits — — 29,610 — 29,610 Change in securities loaned and sold under agreements to repurchase — (9,152) 31,444 — 22,292 Change in short-term borrowings — 3,358 (1,410) — 1,948 Net change in short-term borrowings and other advances—intercompany 772 4,885 (5,657) — — Other financing activities (324) — — — (324) Net cash provided by (used in) financing activities of continuing operations $ (505) $ 18,390 $ 26,729 $ — $ 44,614 Effect of exchange rate changes on cash and due from banks $ — $ — $ (443) $ — $ (443) Change in cash and due from banks and deposits with banks $ (1,500) $ 2,843 $ (11,720) $ — $ (10,377) Cash and due from banks and deposits with banks at beginning of period 4,516 20,112 284,987 — 309,615 Cash and due from banks and deposits with banks at end of period $ 3,016 $ 22,955 $ 273,267 $ — $ 299,238 Cash and due from banks $ 16 $ 6,642 $ 20,459 $ — $ 27,117 Deposits with banks, net of allowance 3,000 16,313 252,808 — 272,121 Cash and due from banks and deposits with banks at end of period $ 3,016 $ 22,955 $ 273,267 $ — $ 299,238 Supplemental disclosure of cash flow information for continuing operations Cash paid (received) during the period for income taxes $ (1,437) $ 649 $ 2,964 $ — $ 2,176 Cash paid during the period for interest 1,287 1,197 2,061 — 4,545 Non-cash investing activities Transfers to loans HFS from loans $ — $ — $ 961 $ — $ 961 Condensed Consolidating Statement of Cash Flows Six Months Ended June 30, 2020 In millions of dollars Citigroup parent company CGMHI Other Citigroup subsidiaries and eliminations Consolidating adjustments Citigroup consolidated Net cash provided by (used in) operating activities of continuing operations $ 2,857 $ (53,782) $ 31,717 $ — $ (19,208) Cash flows from investing activities of continuing operations Purchases of investments $ — $ — $ (207,701) $ — $ (207,701) Proceeds from sales of investments — — 86,191 — 86,191 Proceeds from maturities of investments — — 53,909 — 53,909 Change in loans — — 7,943 — 7,943 Proceeds from sales and securitizations of loans — — 826 — 826 Change in securities borrowed and purchased under agreements to resell — (29,475) (2,120) — (31,595) Changes in investments and advances—intercompany (7,371) (4,890) 12,261 — — Other investing activities — — (1,262) — (1,262) Net cash used in investing activities of continuing operations $ (7,371) $ (34,365) $ (49,953) $ — $ (91,689) Cash flows from financing activities of continuing operations Dividends paid $ (2,679) $ — $ — $ — $ (2,679) Issuance of preferred stock 1,500 — — — 1,500 Redemption of preferred stock (1,500) — — — (1,500) Treasury stock acquired (2,925) — — — (2,925) Proceeds (repayments) from issuance of long-term debt, net 17,353 8,907 (86) — 26,174 Proceeds (repayments) from issuance of long-term debt—intercompany, net — 6,815 (6,815) — — Change in deposits — — 163,070 — 163,070 Change in securities loaned and sold under agreements to repurchase — 68,650 (19,267) — 49,383 Change in short-term borrowings — 1,074 (5,967) — (4,893) Net change in short-term borrowings and other advances—intercompany (6,826) 3,035 3,791 — — Other financing activities (407) (118) 118 — (407) Net cash provided by financing activities of continuing operations $ 4,516 $ 88,363 $ 134,844 $ — $ 227,723 Effect of exchange rate changes on cash and due from banks $ — $ — $ (972) $ — $ (972) Change in cash and due from banks and deposits with banks $ 2 $ 216 $ 115,636 $ — $ 115,854 Cash and due from banks and deposits with banks at beginning of period 3,021 16,441 174,457 — 193,919 Cash and due from banks and deposits with banks at end of period $ 3,023 $ 16,657 $ 290,093 $ — $ 309,773 Cash and due from banks $ 23 $ 3,728 $ 19,138 $ — $ 22,889 Deposits with banks, net of allowance 3,000 12,929 270,955 — 286,884 Cash and due from banks and deposits with banks at end of period $ 3,023 $ 16,657 $ 290,093 $ — $ 309,773 Supplemental disclosure of cash flow information for continuing operations Cash paid during the period for income taxes $ 39 $ 174 $ 2,330 $ — $ 2,543 Cash paid during the period for interest 1,757 3,006 3,988 — 8,751 Non-cash investing activities Transfers to loans HFS from loans $ — $ — $ 1,036 $ — $ 1,036

BASIS OF PRESENTATION, UPDATE_2

BASIS OF PRESENTATION, UPDATED ACCOUNTING POLICIES AND ACCOUNTING CHANGES (Policies)	6 Months Ended
	Jun. 30, 2021
Accounting Policies [Abstract]
Summary of Significant Accounting Policies and Accounting Changes	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES See Note 1 to the Consolidated Financial Statements in Citigroup’s 2020 Annual Report on Form 10-K for a summary of all of Citigroup’s significant accounting policies. ACCOUNTING CHANGES Accounting for Financial Instruments — Credit Losses Overview In June 2016, the Financial Accounting Standards Board (FASB) issued ASU No. 2016-13, Financial Instruments — Credit Losses (Topic 326). The ASU introduced a new credit loss methodology, the current expected credit losses (CECL) methodology, which requires earlier recognition of credit losses while also providing additional disclosure about credit risk. Citi adopted the ASU as of January 1, 2020, which, as discussed below, resulted in an increase in Citi’s Allowance for credit losses and a decrease to opening Retained earnings , net of deferred income taxes, at January 1, 2020. The CECL methodology utilizes a lifetime “expected credit loss” measurement objective for the recognition of credit losses for loans, held-to-maturity debt securities, receivables and other financial assets measured at amortized cost at the time the financial asset is originated or acquired. The ACL is adjusted each period for changes in expected lifetime credit losses. The CECL methodology represents a significant change from prior U.S. GAAP and replaced the prior multiple existing impairment methods, which generally required that a loss be incurred before it was recognized. Within the life cycle of a loan or other financial asset, the methodology generally results in the earlier recognition of the provision for credit losses and the related ACL than prior U.S. GAAP. For available-for-sale debt securities where fair value is less than cost that Citi intends to hold or more-likely-than-not will not be required to sell, credit-related impairment, if any, is recognized through an ACL and adjusted each period for changes in credit risk. January 1, 2020 CECL Transition (Day 1) Impact The CECL methodology’s impact on expected credit losses, among other things, reflects Citi’s view of the current state of the economy, forecasted macroeconomic conditions and quality of Citi’s portfolios. At the January 1, 2020 date of adoption, based on forecasts of macroeconomic conditions and exposures at that time, the aggregate impact to Citi was an approximate $4.1 billion, or an approximate 29%, pretax increase in the Allowance for credit losses , along with a $3.1 billion after-tax decrease in Retained earnings and a deferred tax asset increase of $1.0 billion. This transition impact reflects (i) a $4.9 billion build to the Allowance for credit losses for Citi’s consumer exposures, primarily driven by the impact on credit card receivables of longer estimated tenors under the CECL lifetime expected credit loss methodology (loss coverage of approximately 23 months) compared to shorter estimated tenors under the probable loss methodology under prior U.S. GAAP (loss coverage of approximately 14 months), net of recoveries; and (ii) a release of $0.8 billion of reserves primarily related to Citi’s corporate net loan loss exposures, largely due to more precise contractual maturities that result in shorter remaining tenors, incorporation of recoveries and use of more specific historical loss data based on an increase in portfolio segmentation across industries and geographies. Under the CECL methodology, the Allowance for credit losses consists of quantitative and qualitative components. Citi’s quantitative component of the Allowance for credit losses is model based and utilizes a single forward-looking macroeconomic forecast and discounts inputs for the corporate classifiably managed portfolios, complemented by the qualitative component described below, in estimating expected credit losses and discounts inputs for the corporate classifiably managed portfolios. Reasonable and supportable forecast periods vary by product. For example, Citi’s consumer models use a 13-quarter reasonable and supportable period and revert to historical loss experience thereafter, while its corporate loan models use a nine-quarter reasonable and supportable period followed by a three-quarter graduated transition to historical loss experience. The qualitative management adjustment component includes, among other things, management adjustments to reflect economic uncertainty based on the likelihood and severity of downside scenarios and certain portfolio characteristics not captured in the quantitative component, such as concentrations, collateral coverage, model limitations, idiosyncratic events and other factors as required by banking supervisory guidance for the ACL. The qualitative management adjustment component also includes management adjustments to reflect the uncertainty around the estimated impact of the pandemic on credit loss estimates. Accounting for Variable Post-Charge-Off Third-Party Collection Costs In the fourth quarter of 2020, Citi revised the 2020 second quarter accounting conclusion for its variable post-charge-off third-party collection costs from a “change in accounting estimate effected by a change in accounting principle” to a “change in accounting principle,” which required an adjustment to January 1, 2020 opening retained earnings, rather than 2020 net income. As a result, Citi’s full-year and quarterly results for 2020 were revised to reflect this change as if it were effective as of January 1, 2020, as follows: • An increase to beginning retained earnings on January 1, 2020 of $330 million and a decrease of $443 million in the allowance for credit losses on loans, as well as a $113 million decrease in other assets related to income taxes. • A decrease of $18 million to provisions for credit losses on loans in the first quarter and increases of $339 million and $122 million to provisions for credit losses on loans in the second and third quarters, respectively. • Increases in operating expenses of $49 million and $45 million with a corresponding decrease in net credit losses, in the first and second quarters, respectively. In making these revisions, Citi considered the guidance in ASC Topic 250, Accounting Changes and Error Corrections ; ASC Topic 270, Interim Reporting ; ASC Topic 250-S99-1, Assessing Materiality ; and ASC Topic 250-S99-23, Accounting Changes Not Retroactively Applied Due to Immateriality, Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements . Citi believes that the effects of the revisions were not material to any previously reported quarterly or annual period. Reference Rate Reform In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting , which provides optional guidance to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. Specifically, the guidance permits an entity, when certain criteria are met, to consider amendments to contracts made to comply with reference rate reform to meet the definition of a modification under U.S. GAAP. It further allows hedge accounting to be maintained and permits a one-time transfer or sale of qualifying held-to-maturity securities. The expedients and exceptions provided by the amendments are permitted to be adopted any time through December 31, 2022 and do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022, except for certain optional expedients elected for certain hedging relationships existing as of December 31, 2022. The ASU was adopted by Citi as of June 30, 2020 with prospective application and did not impact financial results in 2020. In January 2021, the FASB issued ASU No. 2021-01, Reference Rate Reform (Topic 848): Scope , which clarifies that the scope of the initial accounting relief issued by the FASB in March 2020 includes derivative instruments that do not reference a rate that is expected to be discontinued but that use an interest rate for margining, discounting or contract price alignment that is modified as a result of reference rate reform (commonly referred to as the “discounting transition”). The amendments do not apply to contract modifications made after December 31, 2022, new hedging relationships entered into after December 31, 2022 and existing hedging relationships evaluated for effectiveness in periods after December 31, 2022, except for hedging relationships existing as of December 31, 2022, that apply certain optional expedients in which the accounting effects are recorded through the end of the hedging relationship. The ASU was adopted by Citi on a full retrospective basis upon issuance and did not impact financial results in 2020. FUTURE ACCOUNTING CHANGES Long-Duration Insurance Contracts In August 2018, the FASB issued ASU No. 2018-12, Financial Services—Insurance: Targeted Improvements to the Accounting for Long-Duration Contracts , which changes the existing recognition, measurement, presentation and disclosures for long-duration contracts issued by an insurance entity. Specifically, the guidance (i) improves the timeliness of recognizing changes in the liability for future policy benefits and prescribes the rate used to discount future cash flows for long-duration insurance contracts, (ii) simplifies and improves the accounting for certain market-based options or guarantees associated with deposit (or account balance) contracts, (iii) simplifies the amortization of deferred acquisition costs and (iv) introduces additional quantitative and qualitative disclosures. Citi has certain insurance subsidiaries, primarily in Mexico, that issue long-duration insurance contracts such as traditional life insurance policies and life-contingent annuity contracts that will be impacted by the requirements of ASU 2018-12. The effective date of ASU 2018-12 was deferred for all insurance entities by ASU 2019-09, Financial Services—Insurance: Effective Date (issued in October 2019) and by ASU 2020-11, Financial Services—Insurance: Effective Date and Early Application

DISCONTINUED OPERATIONS AND S_2

DISCONTINUED OPERATIONS AND SIGNIFICANT DISPOSALS (Tables)	6 Months Ended
	Jun. 30, 2021
Discontinued Operations and Disposal Groups [Abstract]
Summarized financial information disposal groups including discontinued operations	The following table summarizes financial information for all Discontinued operations : Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Total revenues, net of interest expense $ — $ — $ — $ — Income (loss) from discontinued operations (1) $ 10 $ (1) $ 8 $ (19) Benefit for income taxes — — — — Income (loss) from discontinued operations, $ 10 $ (1) $ 8 $ (19)

BUSINESS SEGMENTS (Tables)

BUSINESS SEGMENTS (Tables)	6 Months Ended
	Jun. 30, 2021
Segment Reporting [Abstract]
Information regarding the Company's operations by segment	The following tables present certain information regarding the Company’s continuing operations by segment: Three Months Ended June 30, Revenues, (1) Provision (benefits) Income (loss) from (2) Identifiable assets In millions of dollars, except identifiable assets in billions 2021 2020 2021 2020 2021 2020 June 30, December 31, 2020 Global Consumer Banking $ 6,820 $ 7,339 $ 573 $ (257) $ 1,832 $ (705) $ 432 $ 434 Institutional Clients Group 10,387 12,137 1,104 455 3,829 1,822 1,795 1,730 Corporate/Other 267 290 (522) (146) 532 (60) 101 96 Total $ 17,474 $ 19,766 $ 1,155 $ 52 $ 6,193 $ 1,057 $ 2,328 $ 2,260 Six Months Ended June 30, Revenues, (3) Provision (benefits) Income (loss) from (4) In millions of dollars 2021 2020 2021 2020 2021 2020 Global Consumer Banking $ 13,857 $ 15,513 $ 1,230 $ (538) $ 4,003 $ (1,489) Institutional Clients Group 22,607 24,621 2,830 1,484 9,767 5,396 Corporate/Other 337 363 (573) (314) 400 (302) Total $ 36,801 $ 40,497 $ 3,487 $ 632 $ 14,170 $ 3,605 (1) Includes total revenues, net of interest expense (excluding Corporate/Other ), in North America of $7.9 billion and $9.7 billion; in EMEA of $3.3 billion and $3.4 billion; in Latin America of $2.2 billion and $2.3 billion; and in Asia of $3.8 billion and $4.1 billion for the three months ended June 30, 2021 and 2020, respectively. These regional numbers exclude Corporate/Other , which largely operates within the U.S. (2) Includes pretax provisions for credit losses and for benefits and claims in the GCB results of $(0.1) billion and $4.2 billion; in the ICG results of $(0.8) billion and $3.9 billion; and in the Corporate/Other results of $(0.1) billion and $0.2 billion for the three months ended June 30, 2021 and 2020, respectively. (3) Includes total revenues, net of interest expense, in North America of $17.2 billion and $19.9 billion; in EMEA of $7.0 billion and $6.9 billion; in Latin America of $4.4 billion and $4.9 billion; and in Asia of $7.9 billion and $8.5 billion for the six months ended June 30, 2021 and 2020, respectively. Regional numbers exclude Corporate/Other , which largely operates within the U.S. (4) Includes pretax provisions for credit losses and for benefits and claims in the GCB results of $(0.3) billion and $8.9 billion; in the ICG results of $(2.6) billion and $5.9 billion; and in the Corporate/Other results of $(0.2) billion and $0.4 billion for the six months ended June 30, 2021 and 2020, respectively.

INTEREST REVENUE AND EXPENSE (T

INTEREST REVENUE AND EXPENSE (Tables)	6 Months Ended
	Jun. 30, 2021
Banking and Thrift, Interest [Abstract]
Interest revenue and interest expense	Interest revenue and Interest expense consisted of the following: Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Interest revenue Loan interest, including fees $ 8,733 $ 10,149 $ 17,642 $ 21,399 Deposits with banks 126 159 271 686 Securities borrowed and purchased under agreements to resell 205 401 499 1,609 Investments, including dividends 1,818 2,097 3,570 4,378 Trading account assets (1) 1,470 1,673 2,807 3,263 Other interest-bearing assets 111 110 208 393 Total interest revenue $ 12,463 $ 14,589 $ 24,997 $ 31,728 Interest expense Deposits (2) $ 955 $ 1,469 $ 2,007 $ 4,083 Securities loaned and sold under agreements to repurchase 260 453 513 1,538 Trading account liabilities (1) 150 144 264 383 Short-term borrowings and other interest-bearing liabilities 31 140 62 524 Long-term debt 868 1,303 1,786 2,628 Total interest expense $ 2,264 $ 3,509 $ 4,632 $ 9,156 Net interest revenue $ 10,199 $ 11,080 $ 20,365 $ 22,572 Provision (benefit) for credit losses on loans (1,126) 7,990 (2,605) 14,367 Net interest revenue after provision for credit losses on loans $ 11,325 $ 3,090 $ 22,970 $ 8,205 (1) Interest expense on Trading account liabilities of ICG is reported as a reduction of Interest revenue . Interest revenue and Interest expense on cash collateral positions are reported in interest on Trading account assets and Trading account liabilities , respectively. (2) Includes deposit insurance fees and charges of $279 million and $270 million for the three months ended June 30, 2021 and 2020, respectively, and $619 million and $495 million for the six months ended June 30, 2021 and 2020, respectively.

COMMISSIONS AND FEES; ADMINIS_2

COMMISSIONS AND FEES; ADMINISTRATION AND OTHER FIDUCIARY FEES (Tables)	6 Months Ended
	Jun. 30, 2021
Other Income and Expenses [Abstract]
Schedule of commissions, fees, administration and other fiduciary fees revenue	The following tables present Commissions and fees revenue: Three Months Ended June 30, 2021 Six Months Ended June 30, 2021 In millions of dollars ICG GCB Corporate/Other Total ICG GCB Corporate/Other Total Investment banking $ 1,386 $ — $ — $ 1,386 $ 3,010 $ — $ — $ 3,010 Brokerage commissions 528 293 — 821 1,143 620 — 1,763 Credit- and bank-card income Interchange fees 197 2,273 — 2,470 355 4,179 — 4,534 Card-related loan fees 7 170 — 177 12 347 — 359 Card rewards and partner payments (1) (104) (2,411) — (2,515) (179) (4,507) — (4,686) Deposit-related fees (2) 260 65 — 325 504 150 — 654 Transactional service fees 251 26 — 277 492 50 — 542 Corporate finance (3) 180 — — 180 338 — — 338 Insurance distribution revenue 1 112 — 113 6 242 — 248 Insurance premiums — 30 — 30 — 50 — 50 Loan servicing 10 10 4 24 22 17 8 47 Other 27 56 3 86 68 114 3 185 Total commissions and fees (4) $ 2,743 $ 624 $ 7 $ 3,374 $ 5,771 $ 1,262 $ 11 $ 7,044 Three Months Ended June 30, 2020 Six Months Ended June 30, 2020 In millions of dollars ICG GCB Corporate/Other Total ICG GCB Corporate/Other Total Investment banking $ 1,358 $ — $ — $ 1,358 $ 2,398 $ — $ — $ 2,398 Brokerage commissions 482 204 — 686 1,059 453 — 1,512 Credit- and bank-card income Interchange fees 123 1,505 — 1,628 384 3,422 — 3,806 Card-related loan fees 3 132 — 135 14 298 — 312 Card rewards and partner payments (1) (70) (1,745) — (1,815) (219) (3,838) — (4,057) Deposit-related fees (2) 220 85 — 305 453 200 — 653 Transactional service fees 215 20 — 235 442 44 — 486 Corporate finance (3) 149 — — 149 295 — — 295 Insurance distribution revenue 1 113 — 114 5 238 — 243 Insurance premiums — 31 — 31 — 74 — 74 Loan servicing 18 11 2 31 38 22 10 70 Other 27 46 3 76 57 102 3 162 Total commissions and fees (4) $ 2,526 $ 402 $ 5 $ 2,933 $ 4,926 $ 1,015 $ 13 $ 5,954 (1) Citi’s consumer credit card programs have certain partner-sharing agreements that vary by partner. These agreements are subject to contractually based performance thresholds that, if met, would require Citi to make ongoing payments to the partner. The threshold is based on the profitability of a program and is generally calculated based on predefined program revenues less predefined program expenses. In most of Citi’s partner-sharing agreements, program expenses include net credit losses and, to the extent that the increase in net credit losses reduces Citi’s liability for the partners’ share for a given program year, would generally result in lower payments to partners in total for that year and vice versa. Further, in some instances, other partner payments are based on program sales and new account acquisitions. (2) Includes overdraft fees of $24 million and $20 million for the three months ended June 30, 2021 and 2020, respectively, and $47 million and $51 million for the six months ended June 30, 2021 and 2020, respectively. Overdraft fees are accounted for under ASC 310. (3) Consists primarily of fees earned from structuring and underwriting loan syndications or related financing activity. This activity is accounted for under ASC 310. (4) Commissions and fees includes $(2,073) million and $(1,426) million not accounted for under ASC 606, Revenue from Contracts with Customers , for the three months ended June 30, 2021 and 2020, respectively, and $(3,822) million and $(3,228) million for the six months ended June 30, 2021 and 2020, respectively. Amounts reported in Commissions and fees accounted for under other guidance primarily include card-related loan fees, card reward programs and certain partner payments, corporate finance fees, insurance premiums and loan servicing fees. The following tables present Administration and other fiduciary fees revenue: Three Months Ended June 30, 2021 Six Months Ended June 30, 2021 In millions of dollars ICG GCB Corporate/Other Total ICG GCB Corporate/Other Total Custody fees $ 497 $ 6 $ — $ 503 $ 948 $ 12 $ — $ 960 Fiduciary fees 200 169 3 372 392 336 3 731 Guarantee fees 143 2 2 147 285 4 3 292 Total administration and other fiduciary fees (1) $ 840 $ 177 $ 5 $ 1,022 $ 1,625 $ 352 $ 6 $ 1,983 Three Months Ended June 30, 2020 Six Months Ended June 30, 2020 In millions of dollars ICG GCB Corporate/Other Total ICG GCB Corporate/Other Total Custody fees $ 372 $ 6 $ 21 $ 399 $ 738 $ 14 $ 36 $ 788 Fiduciary fees 158 132 — 290 330 288 — 618 Guarantee fees 127 1 2 130 261 3 3 267 Total administration and other fiduciary fees (1) $ 657 $ 139 $ 23 $ 819 $ 1,329 $ 305 $ 39 $ 1,673 (1) Administration and other fiduciary fees includes $147 million and $130 million for the three months ended June 30, 2021 and 2020, respectively, and $292 million and $267 million for the six months ended June 30, 2021 and 2020, respectively, that are not accounted for under ASC 606, Revenue from Contracts with Customers. These generally include guarantee fees.

PRINCIPAL TRANSACTIONS (Tables)

PRINCIPAL TRANSACTIONS (Tables)	6 Months Ended
	Jun. 30, 2021
Principal Transactions Revenue, Net [Abstract]
Principal transactions revenue	The following table presents Principal transactions revenue: Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Interest rate risks (1) $ 530 $ 1,847 $ 1,964 $ 3,757 Foreign exchange risks (2) 965 1,114 1,927 2,109 Equity risks (3) 358 103 1,203 921 Commodity and other risks (4) 393 365 593 760 Credit products and risks (5) 58 728 530 1,871 Total $ 2,304 $ 4,157 $ 6,217 $ 9,418 (1) Includes revenues from government securities and corporate debt, municipal securities, mortgage securities and other debt instruments. Also includes spot and forward trading of currencies and exchange-traded and over-the-counter (OTC) currency options, options on fixed income securities, interest rate swaps, currency swaps, swap options, caps and floors, financial futures, OTC options and forward contracts on fixed income securities. (2) Includes revenues from foreign exchange spot, forward, option and swap contracts, as well as foreign currency translation (FX translation) gains and losses. (3) Includes revenues from common, preferred and convertible preferred stock, convertible corporate debt, equity-linked notes and exchange-traded and OTC equity options and warrants. (4) Primarily includes revenues from crude oil, refined oil products, natural gas and other commodities trades. (5) Includes revenues from structured credit products.

RETIREMENT BENEFITS (Tables)

RETIREMENT BENEFITS (Tables)	6 Months Ended
	Jun. 30, 2021
Retirement Benefits [Abstract]
Components of net (benefit) expense	The following tables summarize the components of net (benefit) expense recognized in the Consolidated Statement of Income for the Company’s pension and postretirement plans for Significant Plans and All Other Plans: Three Months Ended June 30, Pension plans Postretirement benefit plans U.S. plans Non-U.S. plans U.S. plans Non-U.S. plans In millions of dollars 2021 2020 2021 2020 2021 2020 2021 2020 Benefits earned during the period $ — $ — $ 38 $ 34 $ — $ — $ 2 $ 2 Interest cost on benefit obligation 95 101 70 61 3 5 24 22 Expected return on assets (174) (206) (63) (56) (3) (4) (21) (18) Amortization of unrecognized: Prior service benefit — — (2) (2) (2) — (3) (2) Net actuarial loss (gain) 54 53 14 17 (1) — 3 5 Settlement loss (1) — — 4 3 — — — — Total net (benefit) expense $ (25) $ (52) $ 61 $ 57 $ (3) $ 1 $ 5 $ 9 (1) Losses due to settlement relate to repositioning and divestiture activities. Six Months Ended June 30, Pension plans Postretirement benefit plans U.S. plans Non-U.S. plans U.S. plans Non-U.S. plans In millions of dollars 2021 2020 2021 2020 2021 2020 2021 2020 Benefits earned during the period $ — $ — $ 77 $ 71 $ — $ — $ 4 $ 4 Interest cost on benefit obligation 177 207 132 125 6 10 49 46 Expected return on assets (356) (414) (124) (121) (7) (9) (43) (38) Amortization of unrecognized: Prior service cost (benefit) 1 1 (3) (3) (4) — (5) (4) Net actuarial loss 116 109 32 34 (1) — 8 10 Settlement loss (1) — — 4 3 — — — — Total net (benefit) expense $ (62) $ (97) $ 118 $ 109 $ (6) $ 1 $ 13 $ 18 (1) Losses due to settlement relate to repositioning and divestiture activities. The following table summarizes the net expense recognized in the Consolidated Statement of Income for the Company’s U.S. post employment plans: Three Months Ended June 30, Six Months In millions of dollars 2021 2020 2021 2020 Service-related expense Amortization of unrecognized: Net actuarial loss $ 1 $ 1 $ 1 $ 1 Total service-related expense $ 1 $ 1 $ 1 $ 1 Non-service-related (benefit) expense $ (1) $ 3 $ 4 $ 8 Total net expense $ — $ 4 $ 5 $ 9
Summary of the funded status and amounts recognized in the Consolidated Balance Sheet for the Company's U.S. qualified, non-qualified plans and plans outside the U.S.	The following table summarizes the funded status and amounts recognized on the Consolidated Balance Sheet for the Company’s Significant Plans: Six Months Ended June 30, 2021 Pension plans Postretirement benefit plans In millions of dollars U.S. plans Non-U.S. plans U.S. plans Non-U.S. plans Change in projected benefit obligation Projected benefit obligation at beginning of year $ 13,815 $ 8,629 $ 559 $ 1,390 Plans measured annually (25) (2,248) — (277) Projected benefit obligation at beginning of year—Significant Plans $ 13,790 $ 6,381 $ 559 $ 1,113 First quarter activity (983) (572) (37) (146) Projected benefit obligation at March 31, 2021—Significant Plans $ 12,807 $ 5,809 $ 522 $ 967 Benefits earned during the period — 22 — 1 Interest cost on benefit obligation 95 59 3 23 Actuarial loss (1) 429 25 — 20 Benefits paid, net of participants’ contributions and government subsidy (259) (76) (9) (18) Foreign exchange impact and other — 108 — 27 Projected benefit obligation at period end—Significant Plans $ 13,072 $ 5,947 $ 516 $ 1,020 Change in plan assets Plan assets at fair value at beginning of year $ 13,309 $ 7,831 $ 331 $ 1,146 Plans measured annually — (1,500) — (8) Plan assets at fair value at beginning of year—Significant Plans $ 13,309 $ 6,331 $ 331 $ 1,138 First quarter activity (435) (404) (8) (44) Plan assets at fair value at March 31, 2021—Significant Plans $ 12,874 $ 5,927 $ 323 $ 1,094 Actual return on plan assets 566 157 10 24 Company contributions, net of reimbursements 13 18 4 — Benefits paid, net of participants’ contributions and government subsidy (259) (76) (9) (18) Foreign exchange impact and other — 114 — 29 Plan assets at fair value at period end—Significant Plans $ 13,194 $ 6,140 $ 328 $ 1,129 Funded status of the Significant Plans Qualified plans (2) $ 802 $ 193 $ (188) $ 109 Nonqualified plans (3) (680) — — — Funded status of the plans at period end—Significant Plans $ 122 $ 193 $ (188) $ 109 Net amount recognized at period end Benefit asset $ 802 $ 789 $ — $ 109 Benefit liability (680) (596) (188) — Net amount recognized on the balance sheet—Significant Plans $ 122 $ 193 $ (188) $ 109 Amounts recognized in AOCI at period end Prior service benefit $ — $ — $ 97 $ 54 Net actuarial (loss) gain (6,611) (976) 85 (243) Net amount recognized in equity (pretax)—Significant Plans $ (6,611) $ (976) $ 182 $ (189) Accumulated benefit obligation at period end—Significant Plans $ 13,071 $ 5,641 $ 516 $ 1,020 (1) Actuarial loss is associated with the decrease in global discount rates from March to June. (2) The U.S. qualified pension plan is fully funded under specified Employee Retirement Income Security Act of 1974, as amended (ERISA), funding rules as of January 1, 2021 and no minimum required funding is expected for 2021. (3) The nonqualified plans of the Company are unfunded.
Change in accumulated other comprehensive income (loss)	The following table shows the change in AOCI related to the Company’s pension, postretirement and post employment plans: In millions of dollars Three Months Ended June 30, 2021 Six Months Ended June 30, 2021 Beginning of period balance, net of tax (1)(2) $ (6,150) $ (6,864) Actuarial assumptions changes and plan experience (480) 950 Net asset gain (loss) due to difference between actual and expected returns 509 (209) Net amortization 66 147 Curtailment/settlement loss (3) (4) (4) Foreign exchange impact and other (7) 107 Change in deferred taxes, net 3 (190) Change, net of tax $ 87 $ 801 End of period balance, net of tax (1)(2) $ (6,063) $ (6,063) (1) See Note 17 to the Consolidated Financial Statements for further discussion of net AOCI balance. (2) Includes net-of-tax amounts for certain profit-sharing plans outside the U.S. (3) Curtailment and settlement relate to repositioning and divestiture activities.
Assumptions used in determining benefit obligations and net benefit expense	The discount rates utilized during the period in determining the pension and postretirement net (benefit) expense for the Significant Plans are as follows: Net (benefit) expense assumed discount rates during the period Three Months Ended Jun. 30, 2021 Jun. 30, 2020 U.S. plans Qualified pension 3.10 % 3.20 % Nonqualified pension 3.00 3.25 Postretirement 2.85 3.20 Non-U.S. plans Pension 0.25–9.30 0.45–9.45 Weighted average 4.26 4.38 Postretirement 9.70 9.75 The discount rates utilized at period end in determining the pension and postretirement benefit obligations for the Significant Plans are as follows: Plan obligations assumed discount rates at period ended Jun. 30, 2021 Mar. 31, 2021 Dec. 31, 2020 U.S. plans Qualified pension 2.75 % 3.10 % 2.45 % Nonqualified pension 2.70 3.00 2.35 Postretirement 2.60 2.85 2.20 Non-U.S. plans Pension 0.25–9.25 0.25–9.30 0.05–8.15 Weighted average 4.23 4.26 3.60 Postretirement 9.50 9.70 8.55
Effect of one-percentage-point change in the discount rates on pension expense	The following table summarizes the estimated effect on the Company’s Significant Plans quarterly expense of a one-percentage-point change in the discount rate: Three Months Ended June 30, 2021 In millions of dollars One-percentage-point increase One-percentage-point decrease Pension U.S. plans $ 8 $ (11) Non-U.S. plans — 5 Postretirement U.S. plans — — Non-U.S. plans (2) 2
Schedule of company contributions	The following table summarizes the Company’s actual contributions for the six months ended June 30, 2021 and 2020, as well as expected Company contributions for the remainder of 2021 and the actual contributions made in 2020: Pension plans Postretirement plans U.S. plans (1) Non-U.S. plans U.S. plans Non-U.S. plans In millions of dollars 2021 2020 2021 2020 2021 2020 2021 2020 Company contributions (2) for the six months ended June 30 $ 27 $ 28 $ 78 $ 72 $ 9 $ — $ 4 $ 5 Company contributions (reimbursements) made during the — 28 — 86 — (15) — 4 Company contributions expected to be made during 32 — 78 — 3 — 4 — (1) The U.S. plans include benefits paid directly by the Company for the nonqualified pension plans. (2) Company contributions are composed of cash contributions made to the plans and benefits paid directly by the Company.
Defined contribution plans	The following table summarizes the Company’s contributions for the defined contribution plans: Three Months Ended June 30, Six Months In millions of dollars 2021 2020 2021 2020 U.S. plans $ 106 $ 101 $ 211 $ 203 Non-U.S. plans 91 74 183 150

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	6 Months Ended
	Jun. 30, 2021
Earnings Per Share [Abstract]
Reconciliation of the income and share data used in the basic and diluted earnings per share computations	The following table reconciles the income and share data used in the basic and diluted earnings per share (EPS) computations: Three Months Ended June 30, Six Months Ended June 30, In millions of dollars, except per share amounts 2021 2020 2021 2020 Earnings per common share Income from continuing operations before attribution of noncontrolling interests $ 6,193 $ 1,057 $ 14,170 $ 3,605 Less: Noncontrolling interests from continuing operations 10 — 43 (6) Net income from continuing operations (for EPS purposes) $ 6,183 $ 1,057 $ 14,127 $ 3,611 Income (loss) from discontinued operations, net of taxes 10 (1) 8 (19) Citigroup’s net income $ 6,193 $ 1,056 $ 14,135 $ 3,592 Less: Preferred dividends (1) 253 253 545 544 Net income available to common shareholders $ 5,940 $ 803 $ 13,590 $ 3,048 Less: Dividends and undistributed earnings allocated to employee restricted and deferred shares with rights to dividends, applicable to basic EPS 41 11 107 32 Net income allocated to common shareholders for basic EPS $ 5,899 $ 792 $ 13,483 $ 3,016 Weighted-average common shares outstanding applicable to basic EPS (in millions) 2,056.5 2,081.7 2,069.3 2,089.8 Basic earnings per share (2) Income from continuing operations $ 2.86 $ 0.38 $ 6.51 $ 1.45 Discontinued operations — — — (0.01) Net income per share—basic $ 2.87 $ 0.38 $ 6.52 $ 1.44 Diluted earnings per share Net income allocated to common shareholders for basic EPS $ 5,899 $ 792 $ 13,483 $ 3,016 Add back: Dividends allocated to employee restricted and deferred shares with rights to dividends that are forfeitable 8 — 15 15 Net income allocated to common shareholders for diluted EPS $ 5,907 $ 792 $ 13,498 $ 3,031 Weighted-average common shares outstanding applicable to basic EPS (in millions) 2,056.5 2,081.7 2,069.3 2,089.8 Effect of dilutive securities Options (3) — — — — Other employee plans 16.5 2.6 15.5 13.2 Adjusted weighted-average common shares outstanding applicable to diluted EPS (in millions) (4) 2,073.0 2,084.3 2,084.8 2,103.0 Diluted earnings per share (2) Income from continuing operations $ 2.84 $ 0.38 $ 6.47 $ 1.45 Discontinued operations — — — (0.01) Net income per share—diluted $ 2.85 $ 0.38 $ 6.47 $ 1.44 (1) On July 15, 2021, Citi declared preferred dividends of approximately $266 million for the third quarter of 2021. During the first quarter of 2021, Citi redeemed all of its 41.4 million Series S preferred shares for $1.035 billion and 465,000 shares of its Series R preferred shares for $465 million and Citi also issued 2.3 million of Series X preferred shares for $2.3 billion. During the second quarter of 2021, Citi redeemed all of its 1.25 million Series Q preferred shares for $1.25 billion and the remaining 1.035 million Series R preferred shares for $1.035 billion. As of August 4, 2021, Citi estimates it will distribute preferred dividends of approximately $228 million in the fourth quarter of 2021, subject to such dividends being declared by the Citi Board of Directors. (2) Due to rounding, earnings per share on continuing operations and discontinued operations may not sum to earnings per share on net income. (3) During the first and second quarters of 2021 and 2020, no significant options to purchase shares of common stock were outstanding. (4) Due to rounding, weighted-average common shares outstanding applicable to basic EPS and the effect of dilutive securities may not sum to weighted-average common shares outstanding applicable to diluted EPS.

SECURITIES BORROWED, LOANED A_2

SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS (Tables)	6 Months Ended
	Jun. 30, 2021
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Abstract]
Securities borrowed or purchased under agreements to resell	Securities borrowed and purchased under agreements to resell , at their respective carrying values, consisted of the following: In millions of dollars June 30, December 31, 2020 Securities purchased under agreements to resell $ 209,300 $ 204,655 Deposits paid for securities borrowed 99,755 90,067 Total, net (1) $ 309,055 $ 294,722 Allowance for credit losses on securities purchased and borrowed (2) (8) (10) Total, net of allowance $ 309,047 $ 294,712
Securities loaned or sold under agreements to repurchase	Securities loaned and sold under agreements to repurchase , at their respective carrying values, consisted of the following: In millions of dollars June 30, December 31, 2020 Securities sold under agreements to repurchase $ 198,353 $ 181,194 Deposits received for securities loaned 23,464 18,331 Total, net (1) $ 221,817 $ 199,525 (1) The above tables do not include securities-for-securities lending transactions of $3.3 billion and $6.8 billion at June 30, 2021 and December 31, 2020, respectively, where the Company acts as lender and receives securities that can be sold or pledged as collateral. In these transactions, the Company recognizes the securities received at fair value within Other assets and the obligation to return those securities as a liability within Brokerage payables . (2) See Note 14 to the Consolidated Financial Statements for further information.
Schedule of gross and net resale agreements and securities borrowing agreements and the related offsetting amount permitted as well as not permitted under ASC 210-20-45	The following tables present the gross and net resale and repurchase agreements and securities borrowing and lending agreements and the related offsetting amounts permitted under ASC 210-20-45. The tables also include amounts related to financial instruments that are not permitted to be offset under ASC 210-20-45, but would be eligible for offsetting to the extent that an event of default has occurred and a legal opinion supporting enforceability of the offsetting rights has been obtained. Remaining exposures continue to be secured by financial collateral, but the Company may not have sought or been able to obtain a legal opinion evidencing enforceability of the offsetting right. As of June 30, 2021 In millions of dollars Gross amounts Gross amounts (1) Net amounts of Amounts (2) Net (3) Securities purchased under agreements to resell $ 303,476 $ 94,176 $ 209,300 $ 174,835 $ 34,465 Deposits paid for securities borrowed 116,070 16,315 99,755 18,037 81,718 Total $ 419,546 $ 110,491 $ 309,055 $ 192,872 $ 116,183 In millions of dollars Gross amounts Gross amounts (1) Net amounts of Amounts (2) Net (3) Securities sold under agreements to repurchase $ 292,529 $ 94,176 $ 198,353 $ 97,308 $ 101,045 Deposits received for securities loaned 39,779 16,315 23,464 4,173 19,291 Total $ 332,308 $ 110,491 $ 221,817 $ 101,481 $ 120,336 As of December 31, 2020 In millions of dollars Gross amounts Gross amounts (1) Net amounts of Amounts (2) Net (3) Securities purchased under agreements to resell $ 362,025 $ 157,370 $ 204,655 $ 159,232 $ 45,423 Deposits paid for securities borrowed 96,425 6,358 90,067 13,474 76,593 Total $ 458,450 $ 163,728 $ 294,722 $ 172,706 $ 122,016 In millions of dollars Gross amounts Gross amounts (1) Net amounts of Amounts (2) Net (3) Securities sold under agreements to repurchase $ 338,564 $ 157,370 $ 181,194 $ 95,563 $ 85,631 Deposits received for securities loaned 24,689 6,358 18,331 7,982 10,349 Total $ 363,253 $ 163,728 $ 199,525 $ 103,545 $ 95,980 (1) Includes financial instruments subject to enforceable master netting agreements that are permitted to be offset under ASC 210-20-45. (2) Includes financial instruments subject to enforceable master netting agreements that are not permitted to be offset under ASC 210-20-45, but would be eligible for offsetting to the extent that an event of default has occurred and a legal opinion supporting enforceability of the offsetting right has been obtained. (3) Remaining exposures continue to be secured by financial collateral, but the Company may not have sought or been able to obtain a legal opinion evidencing enforceability of the offsetting right.
Schedule of gross and net repurchase agreements and securities lending agreements and the related offsetting amount permitted as well as not permitted under ASC 210-20-45	The following tables present the gross and net resale and repurchase agreements and securities borrowing and lending agreements and the related offsetting amounts permitted under ASC 210-20-45. The tables also include amounts related to financial instruments that are not permitted to be offset under ASC 210-20-45, but would be eligible for offsetting to the extent that an event of default has occurred and a legal opinion supporting enforceability of the offsetting rights has been obtained. Remaining exposures continue to be secured by financial collateral, but the Company may not have sought or been able to obtain a legal opinion evidencing enforceability of the offsetting right. As of June 30, 2021 In millions of dollars Gross amounts Gross amounts (1) Net amounts of Amounts (2) Net (3) Securities purchased under agreements to resell $ 303,476 $ 94,176 $ 209,300 $ 174,835 $ 34,465 Deposits paid for securities borrowed 116,070 16,315 99,755 18,037 81,718 Total $ 419,546 $ 110,491 $ 309,055 $ 192,872 $ 116,183 In millions of dollars Gross amounts Gross amounts (1) Net amounts of Amounts (2) Net (3) Securities sold under agreements to repurchase $ 292,529 $ 94,176 $ 198,353 $ 97,308 $ 101,045 Deposits received for securities loaned 39,779 16,315 23,464 4,173 19,291 Total $ 332,308 $ 110,491 $ 221,817 $ 101,481 $ 120,336 As of December 31, 2020 In millions of dollars Gross amounts Gross amounts (1) Net amounts of Amounts (2) Net (3) Securities purchased under agreements to resell $ 362,025 $ 157,370 $ 204,655 $ 159,232 $ 45,423 Deposits paid for securities borrowed 96,425 6,358 90,067 13,474 76,593 Total $ 458,450 $ 163,728 $ 294,722 $ 172,706 $ 122,016 In millions of dollars Gross amounts Gross amounts (1) Net amounts of Amounts (2) Net (3) Securities sold under agreements to repurchase $ 338,564 $ 157,370 $ 181,194 $ 95,563 $ 85,631 Deposits received for securities loaned 24,689 6,358 18,331 7,982 10,349 Total $ 363,253 $ 163,728 $ 199,525 $ 103,545 $ 95,980 (1) Includes financial instruments subject to enforceable master netting agreements that are permitted to be offset under ASC 210-20-45. (2) Includes financial instruments subject to enforceable master netting agreements that are not permitted to be offset under ASC 210-20-45, but would be eligible for offsetting to the extent that an event of default has occurred and a legal opinion supporting enforceability of the offsetting right has been obtained. (3) Remaining exposures continue to be secured by financial collateral, but the Company may not have sought or been able to obtain a legal opinion evidencing enforceability of the offsetting right.
Gross amount of liabilities associated with repurchase agreements and securities lending agreements	The following tables present the gross amounts of liabilities associated with repurchase agreements and securities lending agreements by remaining contractual maturity: As of June 30, 2021 In millions of dollars Open and overnight Up to 30 days 31–90 days Greater than 90 days Total Securities sold under agreements to repurchase $ 138,514 $ 75,384 $ 31,346 $ 47,285 $ 292,529 Deposits received for securities loaned 29,519 1,058 1,677 7,525 39,779 Total $ 168,033 $ 76,442 $ 33,023 $ 54,810 $ 332,308 As of December 31, 2020 In millions of dollars Open and overnight Up to 30 days 31–90 days Greater than 90 days Total Securities sold under agreements to repurchase $ 160,754 $ 98,226 $ 41,679 $ 37,905 $ 338,564 Deposits received for securities loaned 17,038 3 2,770 4,878 24,689 Total $ 177,792 $ 98,229 $ 44,449 $ 42,783 $ 363,253 The following tables present the gross amounts of liabilities associated with repurchase agreements and securities lending agreements by class of underlying collateral: As of June 30, 2021 In millions of dollars Repurchase agreements Securities lending agreements Total U.S. Treasury and federal agency securities $ 106,277 $ — $ 106,277 State and municipal securities 700 — 700 Foreign government securities 106,812 204 107,016 Corporate bonds 22,993 265 23,258 Equity securities 26,227 39,113 65,340 Mortgage-backed securities 23,699 — 23,699 Asset-backed securities 2,052 — 2,052 Other 3,769 197 3,966 Total $ 292,529 $ 39,779 $ 332,308 As of December 31, 2020 In millions of dollars Repurchase agreements Securities lending agreements Total U.S. Treasury and federal agency securities $ 112,437 $ — $ 112,437 State and municipal securities 664 2 666 Foreign government securities 130,017 194 130,211 Corporate bonds 20,149 78 20,227 Equity securities 21,497 24,149 45,646 Mortgage-backed securities 45,566 — 45,566 Asset-backed securities 3,307 — 3,307 Other 4,927 266 5,193 Total $ 338,564 $ 24,689 $ 363,253

BROKERAGE RECEIVABLES AND BRO_2

BROKERAGE RECEIVABLES AND BROKERAGE PAYABLES (Tables)	6 Months Ended
	Jun. 30, 2021
Brokers and Dealers [Abstract]
Brokerage receivables and brokerage payables	Brokerage receivables and Brokerage payables consisted of the following: In millions of dollars June 30, December 31, 2020 Receivables from customers $ 26,744 $ 18,097 Receivables from brokers, dealers and clearing organizations 34,394 26,709 Total brokerage receivables (1) $ 61,138 $ 44,806 Payables to customers $ 46,413 $ 39,319 Payables to brokers, dealers and clearing organizations 13,003 11,165 Total brokerage payables (1) $ 59,416 $ 50,484

INVESTMENTS (Tables)

INVESTMENTS (Tables)	6 Months Ended
	Jun. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Schedule of investments by category	The following table presents Citi’s investments by category: In millions of dollars June 30, December 31, 2020 Debt securities available-for-sale (AFS) $ 302,977 $ 335,084 Debt securities held-to-maturity (HTM) (1) 176,742 104,943 Marketable equity securities carried at fair value (2) 195 515 Non-marketable equity securities carried at fair value (2) 598 551 Non-marketable equity securities measured using the measurement alternative (3) 1,381 962 Non-marketable equity securities carried at cost (4) 5,170 5,304 Total investments $ 487,063 $ 447,359 (1) Carried at adjusted amortized cost basis, net of any ACL. (2) Unrealized gains and losses are recognized in earnings. (3) Impairment losses and adjustments to the carrying value as a result of observable price changes are recognized in earnings. See “Non-Marketable Equity Securities Not Carried at Fair Value” below. (4) Represents shares issued by the Federal Reserve Bank, Federal Home Loan Banks and certain exchanges of which Citigroup is a member.
Interest and dividends on investments	The following table presents interest and dividend income on investments: Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Taxable interest $ 1,723 $ 1,984 $ 3,375 $ 4,163 Interest exempt from U.S. federal income tax 57 70 123 146 Dividend income 38 43 72 69 Total interest and dividend income on investments $ 1,818 $ 2,097 $ 3,570 $ 4,378
Realized gains and losses on investments excluding other-than-temporary impairment	The following table presents realized gains and losses on the sales of investments, which exclude impairment losses: Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Gross realized investment gains $ 155 $ 775 $ 615 $ 1,237 Gross realized investment losses (18) (27) (77) (57) Net realized gains on sales of investments $ 137 $ 748 $ 538 $ 1,180
Amortized cost and fair value of AFS debt securities	The amortized cost and fair value of AFS debt securities were as follows: June 30, 2021 December 31, 2020 In millions of dollars Amortized Gross Gross Allowance for credit losses Fair Amortized Gross Gross Allowance for credit losses Fair Debt securities AFS Mortgage-backed securities (1) U.S. government-sponsored agency guaranteed $ 38,842 $ 697 $ 229 $ — $ 39,310 $ 42,836 $ 1,134 $ 52 $ — $ 43,918 Non-U.S. residential 403 1 — — 404 568 3 — — 571 Commercial 43 — — — 43 49 1 — — 50 Total mortgage-backed securities $ 39,288 $ 698 $ 229 $ — $ 39,757 $ 43,453 $ 1,138 $ 52 $ — $ 44,539 U.S. Treasury and federal agency securities U.S. Treasury $ 125,224 $ 1,336 $ 413 $ — $ 126,147 $ 144,094 $ 2,108 $ 49 $ — $ 146,153 Agency obligations — — — — — 50 1 — — 51 Total U.S. Treasury and federal agency securities $ 125,224 $ 1,336 $ 413 $ — $ 126,147 $ 144,144 $ 2,109 $ 49 $ — $ 146,204 State and municipal $ 3,096 $ 95 $ 112 $ — $ 3,079 $ 3,753 $ 123 $ 157 $ — $ 3,719 Foreign government 120,122 587 492 — 120,217 123,467 1,623 122 — 124,968 Corporate 7,902 74 68 5 7,903 10,444 152 91 5 10,500 Asset-backed securities (1) 211 — — — 211 277 5 4 — 278 Other debt securities 5,661 2 — — 5,663 4,871 5 — — 4,876 Total debt securities AFS $ 301,504 $ 2,792 $ 1,314 $ 5 $ 302,977 $ 330,409 $ 5,155 $ 475 $ 5 $ 335,084 (1) The Company invests in mortgage- and asset-backed securities, which are typically issued by VIEs through securitization transactions. The Company’s maximum exposure to loss from these VIEs is equal to the carrying amount of the securities, which is reflected in the table above. For mortgage- and asset-backed securitizations in which the Company has other involvement, see Note 18 to the Consolidated Financial Statements.
Fair value of securities in unrealized loss position	The following table shows the fair value of AFS debt securities that have been in an unrealized loss position: Less than 12 months 12 months or longer Total In millions of dollars Fair Gross Fair Gross Fair Gross June 30, 2021 Debt securities AFS Mortgage-backed securities U.S. government-sponsored agency guaranteed $ 14,217 $ 208 $ 343 $ 21 $ 14,560 $ 229 Non-U.S. residential 22 — — — 22 — Total mortgage-backed securities $ 14,239 $ 208 $ 343 $ 21 $ 14,582 $ 229 U.S. Treasury $ 52,548 $ 413 $ — $ — $ 52,548 $ 413 State and municipal 101 2 1,107 110 1,208 112 Foreign government 43,680 363 6,510 129 50,190 492 Corporate 1,896 67 19 1 1,915 68 Asset-backed securities 3 — — — 3 — Other debt securities 2,263 — — — 2,263 — Total debt securities AFS $ 114,730 $ 1,053 $ 7,979 $ 261 $ 122,709 $ 1,314 December 31, 2020 Debt securities AFS Mortgage-backed securities U.S. government-sponsored agency guaranteed $ 3,588 $ 30 $ 298 $ 22 $ 3,886 $ 52 Non-U.S. residential 1 — — — 1 — Commercial 7 — 4 — 11 — Total mortgage-backed securities $ 3,596 $ 30 $ 302 $ 22 $ 3,898 $ 52 U.S. Treasury and federal agency securities U.S. Treasury $ 25,031 $ 49 $ — $ — $ 25,031 $ 49 Agency obligations 50 — — — 50 — Total U.S. Treasury and federal agency securities $ 25,081 $ 49 $ — $ — $ 25,081 $ 49 State and municipal $ 836 $ 34 $ 893 $ 123 $ 1,729 $ 157 Foreign government 29,344 61 3,502 61 32,846 122 Corporate 1,083 90 24 1 1,107 91 Asset-backed securities 194 3 39 1 233 4 Other debt securities 182 — — — 182 — Total debt securities AFS $ 60,316 $ 267 $ 4,760 $ 208 $ 65,076 $ 475
Amortized cost and fair value of debt securities by contractual maturity dates	The following table presents the amortized cost and fair value of AFS debt securities by contractual maturity dates: June 30, 2021 December 31, 2020 In millions of dollars Amortized Fair Amortized Fair Mortgage-backed securities (1) Due within 1 year $ 107 $ 107 $ 27 $ 27 After 1 but within 5 years 315 317 567 571 After 5 but within 10 years 679 732 688 757 After 10 years (2) 38,187 38,601 42,171 43,184 Total $ 39,288 $ 39,757 $ 43,453 $ 44,539 U.S. Treasury and federal agency securities Due within 1 year $ 30,179 $ 30,264 $ 34,834 $ 34,951 After 1 but within 5 years 93,736 94,589 108,160 110,091 After 5 but within 10 years 1,309 1,294 1,150 1,162 After 10 years (2) — — — — Total $ 125,224 $ 126,147 $ 144,144 $ 146,204 State and municipal Due within 1 year $ 379 $ 379 $ 427 $ 428 After 1 but within 5 years 92 94 189 198 After 5 but within 10 years 245 250 276 267 After 10 years (2) 2,380 2,356 2,861 2,826 Total $ 3,096 $ 3,079 $ 3,753 $ 3,719 Foreign government Due within 1 year $ 48,404 $ 48,458 $ 48,133 $ 48,258 After 1 but within 5 years 64,721 64,846 67,365 68,586 After 5 but within 10 years 4,900 4,803 5,908 6,011 After 10 years (2) 2,097 2,110 2,061 2,113 Total $ 120,122 $ 120,217 $ 123,467 $ 124,968 All other (3) Due within 1 year $ 6,436 $ 6,435 $ 6,661 $ 6,665 After 1 but within 5 years 6,200 6,234 7,814 7,891 After 5 but within 10 years 1,078 1,080 1,018 1,034 After 10 years (2) 60 28 99 64 Total $ 13,774 $ 13,777 $ 15,592 $ 15,654 Total debt securities AFS $ 301,504 $ 302,977 $ 330,409 $ 335,084 (1) Includes mortgage-backed securities of U.S. government-sponsored agencies. The Company invests in mortgage- and asset-backed securities, which are typically issued by VIEs through securitization transactions. (2) Investments with no stated maturities are included as contractual maturities of greater than 10 years. Actual maturities may differ due to call or prepayment rights. (3) Includes corporate, asset-backed and other debt securities. The following table presents the carrying value and fair value of HTM debt securities by contractual maturity dates: June 30, 2021 December 31, 2020 In millions of dollars Amortized cost (1) Fair value Amortized cost (1) Fair value Mortgage-backed securities Due within 1 year $ 307 $ 304 $ 81 $ 81 After 1 but within 5 years 855 919 463 477 After 5 but within 10 years 1,571 1,676 1,699 1,873 After 10 years (2) 64,302 65,190 48,710 50,671 Total $ 67,035 $ 68,089 $ 50,953 $ 53,102 U.S. Treasury securities Due within 1 year $ — $ — $ — $ — After 1 but within 5 years 32,125 31,742 18,955 19,127 After 5 but within 10 years 40,217 40,268 2,338 2,115 After 10 years (2) — — — — Total $ 72,342 $ 72,010 $ 21,293 $ 21,242 State and municipal Due within 1 year $ 11 $ 11 $ 6 $ 6 After 1 but within 5 years 193 197 139 142 After 5 but within 10 years 742 785 818 869 After 10 years (2) 8,084 8,683 8,222 8,912 Total $ 9,030 $ 9,676 $ 9,185 $ 9,929 Foreign government Due within 1 year $ 344 $ 347 $ 361 $ 360 After 1 but within 5 years 1,411 1,419 1,570 1,662 After 5 but within 10 years — — — — After 10 years (2) — — — — Total $ 1,755 $ 1,766 $ 1,931 $ 2,022 All other (3) Due within 1 year $ — $ — $ — $ — After 1 but within 5 years — — — — After 5 but within 10 years 10,452 10,449 11,795 15,020 After 10 years (2) 16,128 16,112 9,786 6,475 Total $ 26,580 $ 26,561 $ 21,581 $ 21,495 Total debt securities HTM $ 176,742 $ 178,102 $ 104,943 $ 107,790 (1) Amortized cost is reported net of ACL of $83 million and $86 million at June 30, 2021 and December 31, 2020, respectively. (2) Investments with no stated maturities are included as contractual maturities of greater than 10 years. Actual maturities may differ due to call or prepayment rights. (3) Includes corporate and asset-backed securities.
Carrying value and fair value of debt securities HTM	The carrying value and fair value of debt securities HTM were as follows: In millions of dollars Amortized cost, net (1) Gross Gross Fair June 30, 2021 Debt securities HTM Mortgage-backed securities (2) U.S. government-sponsored agency guaranteed $ 65,387 $ 1,525 $ 472 $ 66,440 Non-U.S. residential 757 1 — 758 Commercial 891 2 2 891 Total mortgage-backed securities $ 67,035 $ 1,528 $ 474 $ 68,089 U.S. Treasury securities $ 72,342 $ 120 $ 452 $ 72,010 State and municipal (3) 9,030 655 9 9,676 Foreign government 1,755 25 14 1,766 Asset-backed securities (2) 26,580 12 31 26,561 Total debt securities HTM, net $ 176,742 $ 2,340 $ 980 $ 178,102 December 31, 2020 Debt securities HTM Mortgage-backed securities (2) U.S. government-sponsored agency guaranteed $ 49,004 $ 2,162 $ 15 $ 51,151 Non-U.S. residential 1,124 3 1 1,126 Commercial 825 1 1 825 Total mortgage-backed securities $ 50,953 $ 2,166 $ 17 $ 53,102 U.S. Treasury securities (4) $ 21,293 $ 4 $ 55 $ 21,242 State and municipal 9,185 755 11 9,929 Foreign government 1,931 91 — 2,022 Asset-backed securities (2) 21,581 6 92 21,495 Total debt securities HTM, net $ 104,943 $ 3,022 $ 175 $ 107,790 (1) Amortized cost is reported net of ACL of $83 million and $86 million at June 30, 2021 and December 31, 2020, respectively. (2) The Company invests in mortgage- and asset-backed securities. These securitizations are generally considered VIEs. The Company’s maximum exposure to loss from these VIEs is equal to the carrying amount of the securities, which is reflected in the table above. For mortgage- and asset-backed securitizations in which the Company has other involvement, see Note 18 to the Consolidated Financial Statements. (3) In February 2021, Citibank transferred $237 million of state and municipal bonds from AFS classification to HTM classification in accordance with ASC 320. At the time of transfer, the securities were in an unrealized gain position of $14 million. The gain amounts will remain in AOCI and will be amortized over the remaining life of the securities. (4) In August 2020, Citibank transferred $13.1 billion of investments in U.S. Treasury securities from AFS classification to HTM classification in accordance with ASC 320. At the time of transfer, the securities were in an unrealized gain position of $144 million. The gain amounts will remain in AOCI and will be amortized over the remaining life of the securities.
Total other-than-temporary impairments recognized	The following tables present total impairment on Investments recognized in earnings: Three Months Ended Three Months Ended In millions of dollars AFS Other Total AFS Other assets Total Impairment losses related to debt securities that the Company does not intend to sell nor will likely be required to sell: Total impairment losses recognized during the period $ — $ — $ — $ — $ — $ — Less: portion of impairment loss recognized in AOCI (before taxes) — — — — — — Net impairment losses recognized in earnings for debt securities that the Company does not intend to sell nor will likely be required to sell $ — $ — $ — $ — $ — $ — Impairment losses recognized in earnings for debt securities that the Company intends to sell, would more-likely-than-not be required to sell or will be subject to an issuer call deemed probable of exercise 9 — 9 19 — 19 Total impairment losses recognized in earnings $ 9 $ — $ 9 $ 19 $ — $ 19 Six Months Ended Six Months Ended In millions of dollars AFS Other Total AFS Other assets Total Impairment losses related to debt securities that the Company does not intend to sell nor will likely be required to sell: Total impairment losses recognized during the period $ — $ — $ — $ — $ — $ — Less: portion of impairment loss recognized in AOCI (before taxes) — — — — — — Net impairment losses recognized in earnings for debt securities that the Company does not intend to sell nor will likely be required to sell $ — $ — $ — $ — $ — $ — Impairment losses recognized in earnings for debt securities that the Company intends to sell, would more-likely-than-not be required to sell or will be subject to an issuer call deemed probable of exercise 78 — 78 71 — 71 Total impairment losses recognized in earnings $ 78 $ — $ 78 $ 71 $ — $ 71
Schedule of allowance for credit losses on available for sale securities	Allowance for Credit Losses on AFS Debt Securities Three Months Ended June 30, 2021 In millions of dollars Mortgage-backed U.S. Treasury and federal agency State and municipal Foreign government Corporate Total AFS Allowance for credit losses at beginning of period $ — $ — $ — $ — $ 5 $ 5 Less: Write-offs — — — — — — Recoveries of amounts written-off — — — — — — Net credit losses (NCLs) $ — $ — $ — $ — $ — $ — NCLs $ — $ — $ — $ — $ — $ — Credit losses on securities without previous credit losses — — — — — — Net reserve builds (releases) on securities with previous credit losses — — — — — — Total provision for credit losses $ — $ — $ — $ — $ — $ — Initial allowance on newly purchased credit-deteriorated securities during the period — — — — — — Allowance for credit losses at end of period $ — $ — $ — $ — $ 5 $ 5 Six Months Ended June 30, 2021 In millions of dollars Mortgage-backed U.S. Treasury and federal agency State and municipal Foreign government Corporate Total AFS Allowance for credit losses at beginning of period $ — $ — $ — $ — $ 5 $ 5 Less: Write-offs — — — — — — Recoveries of amounts written-off — — — — — — Net credit losses (NCLs) $ — $ — $ — $ — $ — $ — NCLs $ — $ — $ — $ — $ — $ — Credit losses on securities without previous credit losses — — — — — — Net reserve builds (releases) on securities with previous credit losses — — — — — — Total provision for credit losses $ — $ — $ — $ — $ — $ — Initial allowance on newly purchased credit-deteriorated securities during the period — — — — — — Allowance for credit losses at end of period $ — $ — $ — $ — $ 5 $ 5 Three Months Ended June 30, 2020 In millions of dollars Mortgage-backed U.S. Treasury and federal agency State and municipal Foreign government Corporate Total AFS Allowance for credit losses at beginning of period $ — $ — $ — $ — $ — $ — Less: Write-offs — — — — — — Recoveries of amounts written-off — — — — — — Net credit losses (NCLs) $ — $ — $ — $ — $ — $ — NCLs $ — $ — $ — $ — $ — $ — Credit losses on securities without previous credit losses — — — 3 5 8 Net reserve builds (releases) on securities with previous credit losses — — — — — — Total provision for credit losses $ — $ — $ — $ 3 $ 5 $ 8 Initial allowance on newly purchased credit-deteriorated securities during the period — — — — — — Allowance for credit losses at end of period $ — $ — $ — $ 3 $ 5 $ 8 Six Months Ended June 30, 2020 In millions of dollars Mortgage-backed U.S. Treasury and federal agency State and municipal Foreign government Corporate Total AFS Allowance for credit losses at beginning of period $ — $ — $ — $ — $ — $ — Less: Write-offs — — — — — — Recoveries of amounts written-off — — — — — — Net credit losses (NCLs) $ — $ — $ — $ — $ — $ — NCLs $ — $ — $ — $ — $ — $ — Credit losses on securities without previous credit losses — — — 3 5 8 Net reserve builds (releases) on securities with previous credit losses — — — — — — Total provision for credit losses $ — $ — $ — $ 3 $ 5 $ 8 Initial allowance on newly purchased credit-deteriorated securities during the period — — — — — — Allowance for credit losses at end of period $ — $ — $ — $ 3 $ 5 $ 8
Carrying value of non-marketable equity securities measured using the measurement alternative	Below is the carrying value of non-marketable equity securities measured using the measurement alternative at June 30, 2021 and December 31, 2020: In millions of dollars June 30, 2021 December 31, 2020 Measurement alternative: Carrying value $ 1,381 $ 962 Below are amounts recognized in earnings and life-to-date amounts for non-marketable equity securities measured using the measurement alternative: Three Months Ended Six Months In millions of dollars 2021 2020 2021 2020 Measurement alternative: (1) Impairment losses $ 4 $ 50 $ 4 $ 53 Downward changes for observable prices — 19 — 19 Upward changes for observable prices 215 17 296 42 (1) See Note 20 to the Consolidated Financial Statements for additional information on these nonrecurring fair value measurements. Life-to-date amounts on securities still held In millions of dollars June 30, 2021 Measurement alternative: Impairment losses $ 73 Downward changes for observable prices 53 Upward changes for observable prices 783
Investments in alternative investment funds	Fair value Unfunded Redemption frequency Redemption In millions of dollars June 30, December 31, 2020 June 30, December 31, 2020 Private equity funds (1)(2) $ 124 $ 123 $ 60 $ 62 — — Real estate funds (2)(3) 2 9 3 20 — — Mutual/collective investment funds 21 20 — — — — Total $ 147 $ 152 $ 63 $ 82 — — (1) Private equity funds include funds that invest in infrastructure, emerging markets and venture capital. (2) With respect to the Company’s investments in private equity funds and real estate funds, distributions from each fund will be received as the underlying assets held by these funds are liquidated. It is estimated that the underlying assets of these funds will be liquidated over a period of several years as market conditions allow. Private equity and real estate funds do not allow redemption of investments by their investors. Investors are permitted to sell or transfer their investments, subject to the approval of the general partner or investment manager of these funds, which generally may not be unreasonably withheld. (3) Includes several real estate funds that invest primarily in commercial real estate in the U.S., Europe and Asia.

LOANS (Tables)

LOANS (Tables)	6 Months Ended
	Jun. 30, 2021
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Schedule of loan delinquency and non-accrual details	Consumer Loans, Delinquencies and Non-Accrual Status at June 30, 2021 In millions of dollars Total current (1)(2) 30–89 days past due (3)(4) ≥ 90 days past due (3)(4) Past due government guaranteed (5) Total loans Non-accrual loans for which there is no ACLL Non-accrual loans for which there is an ACLL Total 90 days In North America offices (6) Residential first mortgages (7) $ 43,811 $ 315 $ 307 $ 402 $ 44,835 $ 133 $ 407 $ 540 $ 257 Home equity loans (8)(9) 5,937 51 180 — 6,168 68 253 321 — Credit cards 123,133 770 920 — 124,823 — — — 920 Personal, small business and other 3,655 13 8 — 3,676 — 18 18 — Total $ 176,536 $ 1,149 $ 1,415 $ 402 $ 179,502 $ 201 $ 678 $ 879 $ 1,177 In offices outside North America (6) Residential first mortgages (7) $ 39,964 $ 184 $ 196 $ — $ 40,344 $ — $ 476 $ 476 $ — Credit cards 20,162 304 310 — 20,776 — 233 233 232 Personal, small business and other 34,910 235 128 — 35,273 — 218 218 — Total $ 95,036 $ 723 $ 634 $ — $ 96,393 $ — $ 927 $ 927 $ 232 Total Citigroup (10) $ 271,572 $ 1,872 $ 2,049 $ 402 $ 275,895 $ 201 $ 1,605 $ 1,806 $ 1,409 (1) Loans less than 30 days past due are presented as current. (2) Includes $14 million of residential first mortgages recorded at fair value. (3) Excludes loans guaranteed by U.S. government-sponsored agencies. (4) Loans modified under Citi’s consumer relief programs continue to be reported in the same delinquency bucket they were in at the time of modification. Most modified loans in North America would not be reported as 30–89 or 90+ days past due for the duration of the programs (which have various durations, and certain of which may be renewed by the customer). Consumer relief programs in Asia and Mexico largely expired during the fourth quarter of 2020 and began to age at that time. (5) Consists of residential first mortgages that are guaranteed by U.S. government-sponsored agencies that are 30–89 days past due of $0.1 billion and 90 days or more past due of $0.3 billion. (6) North America includes the U.S., Canada and Puerto Rico. Mexico is included in offices outside North America. (7) Includes approximately $0.1 billion of residential first mortgage loans in process of foreclosure. (8) Includes approximately $0.1 billion of home equity loans in process of foreclosure. (9) Fixed-rate home equity loans and loans extended under home equity lines of credit, which are typically in junior lien positions. (10) Consumer loans are net of unearned income of $676 million. Unearned income on consumer loans primarily represents unamortized origination fees and costs, premiums and discounts. Interest Income Recognized for Non-Accrual Consumer Loans In millions of dollars Three Months Ended June 30, 2021 Three Months Ended June 30, 2020 Six Months Ended June 30, 2021 Six Months Ended June 30, 2020 In North America offices (1) Residential first mortgages $ 3 $ 4 $ 6 $ 7 Home equity loans 2 2 4 4 Credit cards — — — — Personal, small business and other — — — — Total $ 5 $ 6 $ 10 $ 11 In offices outside North America (1) Residential first mortgages $ — $ — $ — $ — Credit cards — — — — Personal, small business and other — — — — Total $ — $ — $ — $ — Total Citigroup $ 5 $ 6 $ 10 $ 11 (1) North America includes the U.S., Canada and Puerto Rico. Mexico is included in offices outside North America. Consumer Loans, Delinquencies and Non-Accrual Status at December 31, 2020 In millions of dollars Total current (1)(2) 30–89 days past due (3)(4) ≥ 90 days past due (3)(4) Past due government guaranteed (5) Total Non-accrual loans for which there is no ACLL Non-accrual loans for which there is an ACLL Total 90 days In North America offices (6) Residential first mortgages (7) $ 46,471 $ 402 $ 381 $ 524 $ 47,778 $ 136 $ 509 $ 645 $ 332 Home equity loans (8)(9) 6,829 78 221 — 7,128 72 307 379 — Credit cards 127,827 1,228 1,330 — 130,385 — — — 1,330 Personal, small business and other 4,472 27 10 — 4,509 2 33 35 — Total $ 185,599 $ 1,735 $ 1,942 $ 524 $ 189,800 $ 210 $ 849 $ 1,059 $ 1,662 In offices outside North America (6) Residential first mortgages (7) $ 39,557 $ 213 $ 199 $ — $ 39,969 $ — $ 486 $ 486 $ — Credit cards 21,718 429 545 — 22,692 — 384 384 376 Personal, small business and other 35,925 319 134 — 36,378 — 212 212 — Total $ 97,200 $ 961 $ 878 $ — $ 99,039 $ — $ 1,082 $ 1,082 $ 376 Total Citigroup (10) $ 282,799 $ 2,696 $ 2,820 $ 524 $ 288,839 $ 210 $ 1,931 $ 2,141 $ 2,038 (1) Loans less than 30 days past due are presented as current. (2) Includes $14 million of residential first mortgages recorded at fair value. (3) Excludes loans guaranteed by U.S. government-sponsored agencies. (4) Loans modified under Citi’s consumer relief programs continue to be reported in the same delinquency bucket they were in at the time of modification, and thus almost all would not be reported as 30–89 or 90+ days past due for the duration of the programs (which have various durations, and certain of which may be renewed by the customer). (5) Consists of residential first mortgages that are guaranteed by U.S. government-sponsored agencies that are 30–89 days past due of $0.2 billion and 90 days or more past due of $0.3 billion. (6) North America includes the U.S., Canada and Puerto Rico. Mexico is included in offices outside North America. (7) Includes approximately $0.1 billion of residential first mortgage loans in process of foreclosure. (8) Includes approximately $0.1 billion of home equity loans in process of foreclosure. (9) Fixed-rate home equity loans and loans extended under home equity lines of credit, which are typically in junior lien positions.
Schedule of loans credit quality indicators	The following tables provide details on the Fair Isaac Corporation (FICO) scores for Citi’s U.S. consumer loan portfolio based on end-of-period receivables by year of origination. FICO scores are updated monthly for substantially all of the portfolio or, otherwise, on a quarterly basis for the remaining portfolio. FICO score distribution in U.S. portfolio (1)(2) June 30, 2021 In millions of dollars Less than 680 Greater FICO not available Total loans Residential first mortgages 2021 $ 40 $ 1,465 $ 3,637 2020 213 3,175 8,605 2019 127 1,527 4,063 2018 208 533 919 2017 257 697 1,403 Prior 1,707 4,593 9,816 Total residential first mortgages $ 2,552 $ 11,990 $ 28,443 $ 1,850 $ 44,835 Credit cards (3) $ 21,014 $ 50,253 $ 50,827 $ 2,201 $ 124,295 Home equity loans (pre-reset) $ 237 $ 932 $ 1,470 Home equity loans (post-reset) 846 1,347 1,327 Total home equity loans $ 1,083 $ 2,279 $ 2,797 $ 9 $ 6,168 Personal, small business and other 2021 $ 8 $ 35 $ 68 2020 24 56 95 2019 55 77 99 2018 51 55 58 2017 14 16 18 Prior 122 177 142 Total personal, small business and other $ 274 $ 416 $ 480 $ 2,506 $ 3,676 Total $ 24,923 $ 64,938 $ 82,547 $ 6,566 $ 178,974 FICO score distribution in U.S. portfolio (1)(2) December 31, 2020 In millions of dollars Less than 680 Greater FICO not available Total Residential first mortgages 2020 $ 187 $ 3,741 $ 9,052 2019 150 1,857 5,384 2018 246 655 1,227 2017 298 846 1,829 2016 323 1,368 3,799 Prior 1,708 4,133 9,105 Total residential first mortgages $ 2,912 $ 12,600 $ 30,396 $ 1,870 $ 47,778 Credit cards (3) $ 26,227 $ 52,778 $ 49,767 $ 1,041 $ 129,813 Home equity loans (pre-reset) $ 292 $ 1,014 $ 1,657 Home equity loans (post-reset) 1,055 1,569 1,524 Total home equity loans $ 1,347 $ 2,583 $ 3,181 $ 17 $ 7,128 Personal, small business and other 2020 $ 23 $ 58 $ 95 2019 79 106 134 2018 82 80 84 2017 26 27 30 2016 10 9 8 Prior 214 393 529 Total personal, small business and other $ 434 $ 673 $ 880 $ 2,522 $ 4,509 Total $ 30,920 $ 68,634 $ 84,224 $ 5,450 $ 189,228 (1) The FICO bands in the tables are consistent with general industry peer presentations. (2) FICO scores are updated on either a monthly or quarterly basis. For updates that are made only quarterly, certain current-period loans by year of origination are greater than those disclosed in the prior periods. Loans that did not have FICO scores as of the prior period have been updated with FICO scores as they become available. (3) Excludes $528 million and $572 million of balances related to Canada for June 30, 2021 and December 31, 2020, respectively. The following tables provide details on the LTV ratios for Citi’s U.S. consumer mortgage portfolios by year of origination. LTV ratios are updated monthly using the most recent Core Logic Home Price Index data available for substantially all of the portfolio applied at the Metropolitan Statistical Area level, if available, or the state level if not. The remainder of the portfolio is updated in a similar manner using the Federal Housing Finance Agency indices. LTV distribution in U.S. portfolio June 30, 2021 In millions of dollars Less than > 80% but less Greater LTV not available Total Residential first mortgages 2021 $ 4,698 $ 454 $ — 2020 11,573 430 — 2019 5,513 211 3 2018 1,398 262 7 2017 2,232 130 3 Prior 16,129 73 13 Total residential first mortgages $ 41,543 $ 1,560 $ 26 $ 1,706 $ 44,835 Home equity loans (pre-reset) $ 2,562 $ 42 $ 14 Home equity loans (post-reset) 3,324 145 35 Total home equity loans $ 5,886 $ 187 $ 49 $ 46 $ 6,168 Total $ 47,429 $ 1,747 $ 75 $ 1,752 $ 51,003 LTV distribution in U.S. portfolio December 31, 2020 In millions of dollars Less than > 80% but less Greater LTV not available Total Residential first mortgages 2020 $ 11,447 $ 1,543 $ — 2019 7,029 376 2 2018 1,617 507 11 2017 2,711 269 4 2016 5,423 84 2 Prior 14,966 66 16 Total residential first mortgages $ 43,193 $ 2,845 $ 35 $ 1,705 $ 47,778 Home equity loans (pre-reset) $ 2,876 $ 50 $ 16 Home equity loans (post-reset) 3,782 290 58 Total home equity loans $ 6,658 $ 340 $ 74 $ 56 $ 7,128 Total $ 49,851 $ 3,185 $ 109 $ 1,761 $ 54,906
Schedule of impaired loans	The following tables present information about impaired consumer loans and interest income recognized on impaired consumer loans: Three Months Ended Six Months Ended Balance at June 30, 2021 2021 2020 2021 2020 In millions of dollars Recorded investment (1)(2) Unpaid Related specific allowance (3) Average carrying value (4) Interest income (5) Interest income (5) Interest income (5) Interest income (5) Mortgage and real estate Residential first mortgages $ 1,606 $ 1,768 $ 122 $ 1,689 $ 21 $ 15 $ 42 $ 29 Home equity loans 433 587 33 468 3 4 6 7 Credit cards 1,906 1,942 770 1,951 33 25 68 51 Personal, small business and other 524 675 159 524 15 16 27 32 Total $ 4,469 $ 4,972 $ 1,084 $ 4,632 $ 72 $ 60 $ 143 $ 119 Balance at December 31, 2020 In millions of dollars Recorded investment (1)(2) Unpaid Related specific allowance (3) Average carrying value (4) Mortgage and real estate Residential first mortgages $ 1,787 $ 1,962 $ 157 $ 1,661 Home equity loans 478 651 60 527 Credit cards 1,982 2,135 918 1,926 Personal, small business and other 552 552 210 463 Total $ 4,799 $ 5,300 $ 1,345 $ 4,577 (1) Recorded investment in a loan includes net deferred loan fees and costs, unamortized premium or discount and direct write-downs and includes accrued interest only on credit card loans. (2) For June 30, 2021, $202 million of residential first mortgages and $127 million of home equity loans do not have a specific allowance. For December 31, 2020, $211 million of residential first mortgages and $147 million of home equity loans do not have a specific allowance. (3) Included in the Allowance for credit losses on loans . (4) Average carrying value represents the average recorded investment ending balance for the last four quarters and does not include the related specific allowance.
Schedule of troubled debt restructurings	Consumer Troubled Debt Restructurings (1) For the Three Months Ended June 30, 2021 In millions of dollars, except number of loans modified Number of Post- (2)(3) Deferred (4) Contingent (5) Principal (6) Average North America Residential first mortgages 326 $ 57 $ — $ — $ — — % Home equity loans 50 4 — — — — Credit cards 36,337 181 — — — 17 Personal, small business and other 225 3 — — — 3 Total (7) 36,938 $ 245 $ — $ — $ — International Residential first mortgages 530 $ 28 $ — $ — $ — 1 % Credit cards 18,297 94 — — 1 12 Personal, small business and other 6,780 57 — — 2 10 Total (7) 25,607 $ 179 $ — $ — $ 3 For the Three Months Ended June 30, 2020 In millions of dollars, except number of loans modified Number of Post- modification recorded investment (2)(8) Deferred principal (4) Contingent principal forgiveness (5) Principal forgiveness (6) Average North America Residential first mortgages 298 $ 51 $ — $ — $ — — % Home equity loans 83 8 — — — — Credit cards 50,891 220 — — — 17 Personal, small business and other 343 3 — — — 4 Total (7 ) 51,615 $ 282 $ — $ — $ — International Residential first mortgages 642 $ 44 $ — $ — $ — 4 % Credit cards 21,276 94 — — 3 16 Personal, small business and other 11,284 77 — — 2 10 Total (7) 33,202 $ 215 $ — $ — $ 5 (1) The above tables do not include loan modifications that meet the TDR relief criteria in the Coronavirus Aid, Relief, and Economic Security Act (CARES Act) or the interagency guidance. (2) Post-modification balances include past-due amounts that are capitalized at the modification date. (3) Post-modification balances in North America include $4 million of residential first mortgages and $0.3 million of home equity loans to borrowers who have gone through Chapter 7 bankruptcy in the three months ended June 30, 2021. These amounts include $1 million of residential first mortgages and $0.3 million of home equity loans that were newly classified as TDRs in the three months ended June 30, 2021, based on previously received OCC guidance. (4) Represents portion of contractual loan principal that is non-interest bearing, but still due from the borrower. Such deferred principal is charged off at the time of permanent modification to the extent that the related loan balance exceeds the underlying collateral value. (5) Represents portion of contractual loan principal that is non-interest bearing and, depending upon borrower performance, eligible for forgiveness. (6) Represents portion of contractual loan principal that was forgiven at the time of permanent modification. (7) The above tables reflect activity for restructured loans that were considered TDRs during the reporting period. (8) Post-modification balances in North America include $3 million of residential first mortgages and $1 million of home equity loans to borrowers who have gone through Chapter 7 bankruptcy in the three months ended June 30, 2020. These amounts include $2 million of residential first mortgages and $1 million of home equity loans that were newly classified as TDRs in the three months ended June 30, 2020, based on previously received OCC guidance. Consumer Troubled Debt Restructurings (1) For the Six Months Ended June 30, 2021 In millions of dollars, except number of loans modified Number of Post- (2)(3) Deferred (4) Contingent (5) Principal (6) Average North America Residential first mortgages 661 $ 115 $ — $ — $ — — % Home equity loans 107 8 — — — — Credit cards 95,383 481 — — — 17 Personal, small business and other 686 10 — — — 3 Total (7) 96,837 $ 614 $ — $ — $ — International Residential first mortgages 997 $ 52 $ — $ — $ — 1 % Credit cards 42,896 196 — — 9 14 Personal, small business and other 14,317 114 — — 4 10 Total (7) 58,210 $ 362 $ — $ — $ 13 For the Six Months Ended June 30, 2020 In millions of dollars, except number of loans modified Number of Post- modification recorded investment (2)(8) Deferred principal (4) Contingent principal forgiveness (5) Principal forgiveness (6) Average North America Residential first mortgages 575 $ 95 $ — $ — $ — — % Home equity loans 165 16 — — — 1 Credit cards 118,173 525 — — — 17 Personal, small business and other 776 7 — — — 3 Total (7 ) 119,689 $ 643 $ — $ — $ — International Residential first mortgages 1,178 $ 58 $ — $ — $ — 4 % Credit cards 40,591 167 — — 5 16 Personal, small business and other 18,938 128 — — 4 10 Total (7) 60,707 $ 353 $ — $ — $ 9 (1) The above tables do not include loan modifications that meet the TDR relief criteria in the Coronavirus Aid, Relief, and Economic Security Act (CARES Act) or the interagency guidance. (2) Post-modification balances include past-due amounts that are capitalized at the modification date. (3) Post-modification balances in North America include $7 million of residential first mortgages and $0.4 million of home equity loans to borrowers who have gone through Chapter 7 bankruptcy in the six months ended June 30, 2021. These amounts include $2 million of residential first mortgages and $0.3 million of home equity loans that were newly classified as TDRs in the six months ended June 30, 2021, based on previously received OCC guidance. (4) Represents portion of contractual loan principal that is non-interest bearing, but still due from the borrower. Such deferred principal is charged off at the time of permanent modification to the extent that the related loan balance exceeds the underlying collateral value. (5) Represents portion of contractual loan principal that is non-interest bearing and, depending on borrower performance, eligible for forgiveness. (6) Represents portion of contractual loan principal that was forgiven at the time of permanent modification. (7) The above tables reflect activity for restructured loans that were considered TDRs during the reporting period. (8) Post-modification balances in North America include $7 million of residential first mortgages and $2 million of home equity loans to borrowers who have gone through Chapter 7 bankruptcy in the six months ended June 30, 2020. These amounts include $5 million of residential first mortgages and $1 million of home equity loans that were newly classified as TDRs in the six months ended June 30, 2020, based on previously received OCC guidance.
Schedule of troubled debt restructuring loans that defaulted	The following table presents consumer TDRs that defaulted for which the payment default occurred within one year of a permanent modification. Default is defined as 60 days past due. Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 North America Residential first mortgages $ 15 $ 21 $ 33 $ 35 Home equity loans 3 4 7 6 Credit cards 73 92 136 182 Personal, small business and other 1 1 2 3 Total $ 92 $ 118 $ 178 $ 226 International Residential first mortgages $ 10 $ 5 $ 22 $ 11 Credit cards 45 38 97 71 Personal, small business and other 37 18 58 35 Total $ 92 $ 61 $ 177 $ 117 Purchased Credit-Deteriorated Assets Three Months Ended June 30, 2021 Three Months Ended December 31, 2020 Three Months Ended June 30, In millions of dollars Credit Mortgages (1) Installment Credit Mortgages (1) Installment Credit Mortgages (1) Installment Purchase price $ — $ 10 $ — $ — $ 12 $ — $ — $ 3 $ — Allowance for credit losses at acquisition date — — — — — — — — — Discount or premium attributable to non-credit factors — — — — — — — — — Par value (amortized cost basis) $ — $ 10 $ — $ — $ 12 $ — $ — $ 3 $ — (1) Includes loans sold to agencies that were bought back at par due to repurchase agreements.
Corporate
Financing Receivable, Credit Quality Indicator [Line Items]
Schedule of loan delinquency and non-accrual details	Corporate Loan Delinquencies and Non-Accrual Details at June 30, 2021 In millions of dollars 30–89 days past due and accruing (1) ≥ 90 days past due and accruing (1) Total past due Total non-accrual (2) Total current (3) Total loans (4) Commercial and industrial $ 818 $ 121 $ 939 $ 1,878 $ 149,317 $ 152,134 Financial institutions 477 324 801 39 100,149 100,989 Mortgage and real estate 210 21 231 458 72,467 73,156 Lease financing 26 — 26 22 554 602 Other 71 237 308 179 65,878 66,365 Loans at fair value 7,693 Total $ 1,602 $ 703 $ 2,305 $ 2,576 $ 388,365 $ 400,939 Corporate Loan Delinquencies and Non-Accrual Details at December 31, 2020 In millions of dollars 30–89 days past due and accruing (1) ≥ 90 days past due and accruing (1) Total past due Total non-accrual (2) Total current (3) Total loans (4) Commercial and industrial $ 400 $ 109 $ 509 $ 2,795 $ 153,036 $ 156,340 Financial institutions 668 65 733 92 86,864 87,689 Mortgage and real estate 450 247 697 505 70,836 72,038 Lease financing 62 12 74 24 640 738 Other 112 19 131 111 63,157 63,399 Loans at fair value 6,840 Total $ 1,692 $ 452 $ 2,144 $ 3,527 $ 374,533 $ 387,044 (1) Corporate loans that are 90 days past due are generally classified as non-accrual. Corporate loans are considered past due when principal or interest is contractually due but unpaid. (2) Non-accrual loans generally include those loans that are 90 days or more past due or those loans for which Citi believes, based on actual experience and a forward-looking assessment of the collectability of the loan in full, that the payment of interest and/or principal is doubtful. (3) Loans less than 30 days past due are presented as current.
Schedule of loans credit quality indicators	Corporate Loans Credit Quality Indicators Recorded investment in loans (1) Term loans by year of origination Revolving line of credit arrangements (2) June 30, In millions of dollars 2021 2020 2019 2018 2017 Prior Investment grade (3) Commercial and industrial (4) $ 37,302 $ 7,576 $ 5,592 $ 5,066 $ 3,302 $ 9,628 $ 28,121 $ 96,587 Financial institutions (4) 12,951 4,271 1,809 1,409 914 2,615 66,706 90,675 Mortgage and real estate 2,896 5,748 5,845 3,859 2,010 3,204 1,545 25,107 Other (5) 9,815 6,082 2,554 4,315 635 6,629 31,038 61,068 Total investment grade $ 62,964 $ 23,677 $ 15,800 $ 14,649 $ 6,861 $ 22,076 $ 127,410 $ 273,437 Non-investment grade (3) Accrual Commercial and industrial (4) $ 15,439 $ 4,660 $ 3,892 $ 3,334 $ 2,304 $ 4,020 $ 20,021 $ 53,670 Financial institutions (4) 5,008 936 546 334 101 273 3,076 10,274 Mortgage and real estate 1,302 1,314 2,133 1,633 1,045 1,304 672 9,403 Other (5) 1,127 456 644 516 312 647 1,995 5,697 Non-accrual Commercial and industrial (4) 40 182 201 83 108 172 1,091 1,877 Financial institutions — — — — — 11 29 40 Mortgage and real estate 2 13 5 85 10 62 280 457 Other (5) 90 19 5 20 28 20 20 202 Total non-investment grade $ 23,008 $ 7,580 $ 7,426 $ 6,005 $ 3,908 $ 6,509 $ 27,184 $ 81,620 Non-rated private bank loans managed on a delinquency basis (3)(6) $ 5,600 $ 9,537 $ 6,551 $ 3,210 $ 3,248 $ 10,043 $ — $ 38,189 Loans at fair value (7) 7,693 Corporate loans, net of unearned income $ 91,572 $ 40,794 $ 29,777 $ 23,864 $ 14,017 $ 38,628 $ 154,594 $ 400,939 Recorded investment in loans (1) Term loans by year of origination Revolving line of credit arrangements (2) December 31, 2020 In millions of dollars 2020 2019 2018 2017 2016 Prior Investment grade (3) Commercial and industrial (4) $ 38,398 $ 7,607 $ 5,929 $ 3,909 $ 2,094 $ 8,670 $ 25,819 $ 92,426 Financial institutions (4) 10,560 2,964 2,106 782 681 2,030 56,239 75,362 Mortgage and real estate 6,793 6,714 5,174 2,568 1,212 1,719 1,557 25,737 Other (5) 10,874 3,566 4,597 952 780 5,290 31,696 57,755 Total investment grade $ 66,625 $ 20,851 $ 17,806 $ 8,211 $ 4,767 $ 17,709 $ 115,311 $ 251,280 Non-investment grade (3) Accrual Commercial and industrial (4) $ 19,683 $ 4,794 $ 4,645 $ 2,883 $ 1,182 $ 4,533 $ 23,400 $ 61,120 Financial institutions (4) 7,413 700 654 274 141 197 2,855 12,234 Mortgage and real estate 1,882 1,919 2,058 1,457 697 837 551 9,401 Other (5) 1,407 918 725 370 186 657 1,986 6,249 Non-accrual Commercial and industrial (4) 260 203 192 143 57 223 1,717 2,795 Financial institutions 1 — — — — — 91 92 Mortgage and real estate 13 4 3 18 8 32 427 505 Other (5) 15 3 12 29 2 65 9 135 Total non-investment grade $ 30,674 $ 8,541 $ 8,289 $ 5,174 $ 2,273 $ 6,544 $ 31,036 $ 92,531 Non-rated private bank loans managed on a delinquency basis (3)(6) $ 9,823 $ 7,121 $ 3,533 $ 3,674 $ 4,300 $ 7,942 $ — $ 36,393 Loans at fair value (7) 6,840 Corporate loans, net of unearned income $ 107,122 $ 36,513 $ 29,628 $ 17,059 $ 11,340 $ 32,195 $ 146,347 $ 387,044 (1) Recorded investment in a loan includes net deferred loan fees and costs, unamortized premium or discount, less any direct write-downs. (2) There were no significant revolving line of credit arrangements that converted to term loans during the quarter. (3) Held-for-investment loans are accounted for on an amortized cost basis. (4) Includes certain short-term loans with less than one year in tenor. (5) Other includes installment and other, lease financing and loans to government and official institutions. (6) Non-rated private bank loans mainly include mortgage and real estate loans to private banking clients. (7) Loans at fair value include loans to commercial and industrial, financial institutions, mortgage and real estate and other.
Schedule of impaired loans	The following tables present non-accrual loan information by corporate loan type and interest income recognized on non-accrual corporate loans: June 30, 2021 Three Months Ended Six Months Ended In millions of dollars Recorded investment (1) Unpaid Related specific Average carrying value (2) Interest income recognized Interest income recognized (3) Non-accrual corporate loans Commercial and industrial $ 1,878 $ 2,453 $ 314 $ 2,481 $ 15 $ 25 Financial institutions 39 116 — 83 — — Mortgage and real estate 458 749 28 486 — — Lease financing 22 22 — 28 — — Other 179 251 3 121 — 6 Total non-accrual corporate loans $ 2,576 $ 3,591 $ 345 $ 3,199 $ 15 $ 31 December 31, 2020 In millions of dollars Recorded investment (1) Unpaid Related specific Average carrying value (2) Non-accrual corporate loans Commercial and industrial $ 2,795 $ 3,664 $ 442 $ 2,649 Financial institutions 92 181 17 132 Mortgage and real estate 505 803 38 413 Lease financing 24 24 — 34 Other 111 235 18 174 Total non-accrual corporate loans $ 3,527 $ 4,907 $ 515 $ 3,402 June 30, 2021 December 31, 2020 In millions of dollars Recorded investment (1) Related specific Recorded investment (1) Related specific Non-accrual corporate loans with specific allowances Commercial and industrial $ 1,568 $ 314 $ 1,523 $ 442 Financial institutions — — 90 17 Mortgage and real estate 142 28 246 38 Other 58 3 68 18 Total non-accrual corporate loans with specific allowances $ 1,768 $ 345 $ 1,927 $ 515 Non-accrual corporate loans without specific allowances Commercial and industrial $ 310 $ 1,272 Financial institutions 39 2 Mortgage and real estate 316 259 Lease financing 22 24 Other 121 43 Total non-accrual corporate loans without specific allowances $ 808 N/A $ 1,600 N/A (1) Recorded investment in a loan includes net deferred loan fees and costs, unamortized premium or discount, less any direct write-downs. (2) Average carrying value represents the average recorded investment balance and does not include related specific allowances. (3) Interest income recognized for the three and six months ended June 30, 2020 was $4 million and $19 million, respectively. N/A Not applicable
Schedule of troubled debt restructurings	In millions of dollars Carrying value of TDRs modified during the period TDRs involving changes in the amount and/or timing of principal payments (2) TDRs involving changes in the amount and/or timing of interest payments (3) TDRs Three Months Ended June 30, 2021 Commercial and industrial $ 52 $ — $ — $ 52 Mortgage and real estate 5 — — 5 Other — — — — Total $ 57 $ — $ — $ 57 Six Months Ended June 30, 2021 Commercial and industrial $ 73 $ — $ — $ 73 Mortgage and real estate 6 — — 6 Other 1 1 — — Total $ 80 $ 1 $ — $ 79 Three and Six Months Ended June 30, 2020 In millions of dollars Carrying value of TDRs modified TDRs involving changes in the amount and/or timing of principal payments (2) TDRs involving changes in the amount and/or timing of interest payments (3) TDRs Three Months Ended June 30, 2020 Commercial and industrial $ 86 $ — $ — $ 86 Mortgage and real estate 4 — — 4 Other 4 4 — — Total $ 94 $ 4 $ — $ 90 Six Months Ended June 30, 2020 Commercial and industrial $ 148 $ — $ — $ 148 Mortgage and real estate 8 — — 8 Other 4 4 — — Total $ 160 $ 4 $ — $ 156 (1) The above tables do not include loan modifications that meet the TDR relief criteria in the CARES Act or the interagency guidance. (2) TDRs involving changes in the amount or timing of principal payments may involve principal forgiveness or deferral of periodic and/or final principal payments. Because forgiveness of principal is rare for corporate loans, modifications typically have little to no impact on the loans’ projected cash flows and thus little to no impact on the allowance established for the loans. Charge-offs for amounts deemed uncollectible may be recorded at the time of the restructuring or may have already been recorded in prior periods such that no charge-off is required at the time of the modification. (3) TDRs involving changes in the amount or timing of interest payments may involve a below-market interest rate.
Schedule of troubled debt restructuring loans that defaulted	The following table presents total corporate loans modified in a TDR as well as those TDRs that defaulted and for which the payment default occurred within one year of a permanent modification. Default is defined as 60 days past due, except for classifiably managed commercial banking loans, where default is defined as 90 days past due. TDR loans that re-defaulted within one year of modification during the TDR loans that re-defaulted within one year of modification during the In millions of dollars TDR Three Months Ended Six Months Ended TDR Three Months Ended Six Months Ended Commercial and industrial $ 298 $ — $ — $ 406 $ — $ — Mortgage and real estate 80 — — 91 — — Other 38 — — 10 — — Total (1) $ 416 $ — $ — $ 507 $ — $ — (1) The above table reflects activity for loans outstanding that were considered TDRs as of the end of the reporting period.
Schedule of corporate loans by type	The following table presents information by corporate loan type: In millions of dollars June 30, December 31, In North America offices (1) Commercial and industrial $ 53,549 $ 57,731 Financial institutions 65,494 55,809 Mortgage and real estate (2) 62,162 60,675 Installment and other 26,757 26,744 Lease financing 547 673 Total $ 208,509 $ 201,632 In offices outside North America (1) Commercial and industrial $ 105,486 $ 104,072 Financial institutions 35,713 32,334 Mortgage and real estate (2) 10,995 11,371 Installment and other 35,787 33,759 Lease financing 54 65 Governments and official institutions 4,395 3,811 Total $ 192,430 $ 185,412 Corporate loans, net of unearned income (3) $ 400,939 $ 387,044 (1) North America includes the U.S., Canada and Puerto Rico. Mexico is included in offices outside North America. The classification between offices in North America and outside North America is based on the domicile of the booking unit. The difference between the domicile of the booking unit and the domicile of the managing unit is not material. (2) Loans secured primarily by real estate. (3) Corporate loans are net of unearned income of ($841) million and ($844) million at June 30, 2021 and December 31, 2020, respectively. Unearned income on corporate loans primarily represents interest received in advance, but not yet earned, on loans originated on a discounted basis.

ALLOWANCE FOR CREDIT LOSSES (Ta

ALLOWANCE FOR CREDIT LOSSES (Tables)	6 Months Ended
	Jun. 30, 2021
Loans and Leases Receivable Disclosure [Abstract]
Schedule of allowance for credit losses and investment in loans by portfolio segment	Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Allowance for credit losses on loans (ACLL) at beginning of period $ 21,638 $ 20,380 $ 24,956 $ 12,783 Adjustments to opening balance: (1) Financial instruments—credit losses (CECL) (1) — — — 4,201 Variable post-charge-off third-party collection costs (1) — — — (443) Adjusted ACLL at beginning of period $ 21,638 $ 20,380 $ 24,956 $ 16,541 Gross credit losses on loans $ (1,844) $ (2,528) $ (4,052) $ (5,007) Gross recoveries on loans 524 367 984 787 Net credit losses on loans (NCLs) $ (1,320) $ (2,161) $ (3,068) $ (4,220) Replenishment of NCLs $ 1,320 $ 2,161 $ 3,068 $ 4,220 Net reserve builds (releases) for loans (2,184) 5,195 (5,252) 9,289 Net specific reserve builds (releases) for loans (262) 634 (421) 858 Total provision for credit losses on loans (PCLL) $ (1,126) $ 7,990 $ (2,605) $ 14,367 Initial allowance for credit losses on newly purchased credit-deteriorated assets during the period — — — 4 Other, net (see table below) 46 89 (45) (394) ACLL at end of period $ 19,238 $ 26,298 $ 19,238 $ 26,298 Allowance for credit losses on unfunded lending commitments (ACLUC) at beginning of period (2) $ 2,012 $ 1,813 $ 2,655 $ 1,456 Adjustment to opening balance for CECL adoption (1) — — — (194) Provision (release) for credit losses on unfunded lending commitments 44 113 (582) 670 Other, net 17 (67) — (73) ACLUC at end of period (2) $ 2,073 $ 1,859 $ 2,073 $ 1,859 Total allowance for credit losses on loans, leases and unfunded lending commitments $ 21,311 $ 28,157 $ 21,311 $ 28,157 Other, net details Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Sales or transfers of various consumer loan portfolios to HFS $ — $ (1) $ — $ (4) FX translation 62 88 (46) (395) Other (16) 2 1 5 Other, net $ 46 $ 89 $ (45) $ (394) (1) See Note 1 to the Consolidated Financial Statements in Citi’s 2020 Annual Report on Form 10-K for further discussion of the impact of Citi’s adoption of CECL and the change in accounting principle for collection costs. (2) Represents additional credit loss reserves for unfunded lending commitments and letters of credit recorded in Other liabilities on the Consolidated Balance Sheet. Allowance for Credit Losses on Loans and End-of-Period Loans Three Months Ended June 30, 2021 June 30, 2020 In millions of dollars Corporate Consumer Total Corporate Consumer Total ACLL at beginning of period $ 4,084 $ 17,554 $ 21,638 $ 3,451 $ 16,929 $ 20,380 Charge-offs (151) (1,693) (1,844) (347) (2,181) (2,528) Recoveries 62 462 524 23 344 367 Replenishment of NCLs 89 1,231 1,320 324 1,837 2,161 Net reserve builds (releases) (820) (1,364) (2,184) 2,883 2,312 5,195 Net specific reserve builds (releases) (130) (132) (262) 486 148 634 Initial allowance for credit losses on newly purchased credit-deteriorated assets during the period — — — — — — Other (7) 53 46 4 85 89 Ending balance $ 3,127 $ 16,111 $ 19,238 $ 6,824 $ 19,474 $ 26,298 Six Months Ended June 30, 2021 June 30, 2020 In millions of dollars Corporate Consumer Total Corporate Consumer Total ACLL at beginning of period $ 5,402 $ 19,554 $ 24,956 $ 2,886 $ 9,897 $ 12,783 Adjustments to opening balance: Financial instruments—credit losses (CECL adoption) — — — (721) 4,922 4,201 Variable post-charge-off third-party collection costs — — — — (443) (443) Charge-offs (354) (3,698) (4,052) (485) (4,522) (5,007) Recoveries 79 905 984 34 753 787 Replenishment of NCLs 275 2,793 3,068 451 3,769 4,220 Net reserve builds (releases) (2,093) (3,159) (5,252) 4,151 5,138 9,289 Net specific reserve builds (releases) (168) (253) (421) 534 324 858 Initial allowance for credit losses on newly purchased credit-deteriorated assets during the period — — — — 4 4 Other (14) (31) (45) (26) (368) (394) Ending balance $ 3,127 $ 16,111 $ 19,238 $ 6,824 $ 19,474 $ 26,298 (1) See “Accounting Changes” in Note 1 to the Consolidated Financial Statements for additional details. June 30, 2021 December 31, 2020 In millions of dollars Corporate Consumer Total Corporate Consumer Total ACLL Collectively evaluated $ 2,782 $ 15,028 $ 17,810 $ 4,887 $ 18,207 $ 23,094 Individually evaluated 345 1,084 1,429 515 1,345 1,860 Purchased credit deteriorated (1) — (1) (1) — 2 2 Total ACLL $ 3,127 $ 16,111 $ 19,238 $ 5,402 $ 19,554 $ 24,956 Loans, net of unearned income Collectively evaluated $ 390,670 $ 271,278 $ 661,948 $ 376,677 $ 283,885 $ 660,562 Individually evaluated 2,576 4,469 7,045 3,527 4,799 8,326 Purchased credit deteriorated — 134 134 — 141 141 Held at fair value 7,693 14 7,707 6,840 14 6,854 Total loans, net of unearned income $ 400,939 $ 275,895 $ 676,834 $ 387,044 $ 288,839 $ 675,883 (1) The negative allowance on purchased credit-deteriorated loans resulted from expected recoveries on previously written-off accounts.
Schedule of allowance for credit losses on held-to-maturity securities	Allowance for Credit Losses on HTM Debt Securities Three Months Ended June 30, 2021 In millions of dollars Mortgage-backed State and municipal Foreign government Asset-backed Total HTM Allowance for credit losses on HTM debt securities at beginning $ 4 $ 69 $ 5 $ — $ 78 Gross credit losses — — — — — Gross recoveries — — — — — Net credit losses (NCLs) $ — $ — $ — $ — $ — Replenishment of NCLs $ — $ — $ — $ — $ — Net reserve builds (releases) 1 3 — — 4 Net specific reserve builds (releases) — — — — — Total provision for credit losses on HTM debt securities $ 1 $ 3 $ — $ — $ 4 Other, net $ — $ — $ — $ 1 $ 1 Initial allowance for credit losses on newly purchased credit-deteriorated securities during the period — — — — — Allowance for credit losses on HTM debt securities at end of quarter $ 5 $ 72 $ 5 $ 1 $ 83 Six Months Ended June 30, 2021 In millions of dollars Mortgage-backed State and municipal Foreign government Asset-backed Total HTM Allowance for credit losses on HTM debt securities at beginning $ 3 $ 74 $ 6 $ 3 $ 86 Gross credit losses — — — — — Gross recoveries 3 — — — 3 Net credit losses (NCLs) $ 3 $ — $ — $ — $ 3 Replenishment of NCLs $ (3) $ — $ — $ — $ (3) Net reserve builds (releases) 2 (2) (1) (3) (4) Net specific reserve builds (releases) — — — — — Total provision for credit losses on HTM debt securities $ (1) $ (2) $ (1) $ (3) $ (7) Other, net $ — $ — $ — $ 1 $ 1 Initial allowance for credit losses on newly purchased credit-deteriorated securities during the period — — — — — Allowance for credit losses on HTM debt securities at end of quarter $ 5 $ 72 $ 5 $ 1 $ 83 Allowance for Credit Losses on HTM Debt Securities Three Months Ended June 30, 2020 In millions of dollars State and municipal Foreign government Asset- Total HTM Allowance for credit losses on HTM debt securities at beginning of quarter $ 66 $ 4 $ 6 $ 76 Adjustment to opening balance for CECL adoption — — — — Gross credit losses — — — — Gross recoveries — — — — Net credit losses (NCLs) $ — $ — $ — $ — Replenishment of NCLs $ — $ — $ — $ — Net reserve builds (releases) 30 2 (1) 31 Net specific reserve builds (releases) — — — — Total provision for credit losses on HTM debt securities $ 30 $ 2 $ (1) $ 31 Other, net $ 3 $ — $ (3) $ — Initial allowance for credit losses on newly purchased credit-deteriorated securities during the period — — — — Allowance for credit losses on HTM debt securities at end of quarter $ 99 $ 6 $ 2 $ 107 Six Months Ended June 30, 2020 In millions of dollars State and municipal Foreign government Asset- Total HTM Allowance for credit losses on HTM debt securities at beginning of year $ — $ — $ — $ — Adjustment to opening balance for CECL adoption 61 4 5 70 Gross credit losses — — — — Gross recoveries — — — — Net credit losses (NCLs) $ — $ — $ — $ — Replenishment of NCLs $ — $ — $ — $ — Net reserve builds 35 2 — 37 Net specific reserve builds (releases) — — — — Total provision for credit losses on HTM debt securities $ 35 $ 2 $ — $ 37 Other, net $ 3 $ — $ (3) $ — Initial allowance for credit losses on newly purchased credit-deteriorated securities during the period — — — — Allowance for credit losses on HTM debt securities at end of quarter $ 99 $ 6 $ 2 $ 107
Schedule of allowance for credit losses on other assets	Allowance for Credit Losses on Other Assets Three Months Ended June 30, 2021 In millions of dollars Cash and due from banks Deposits with banks Securities borrowed and purchased under agreements Brokerage receivables All other assets (1) Total Allowance for credit losses on other assets at beginning of quarter $ — $ 28 $ 5 $ — $ 30 $ 63 Gross credit losses — — — — — — Gross recoveries — — — — — Net credit losses (NCLs) $ — $ — $ — $ — $ — $ — Replenishment of NCLs $ — $ — $ — $ — $ — $ — Net reserve builds (releases) — (4) 3 — (2) (3) Total provision for credit losses $ — $ (4) $ 3 $ — $ (2) $ (3) Other, net $ — $ — $ — $ — $ — $ — Allowance for credit losses on other assets at end of quarter $ — $ 24 $ 8 $ — $ 28 $ 60 Six Months Ended June 30, 2021 In millions of dollars Cash and due from banks Deposits with banks Securities borrowed and purchased under agreements Brokerage receivables All other assets (1) Total Allowance for credit losses on other assets at beginning of year $ — $ 20 $ 10 $ — $ 25 $ 55 Gross credit losses — — — — — — Gross recoveries — — — — — — Net credit losses (NCLs) $ — $ — $ — $ — $ — $ — Replenishment of NCLs $ — $ — $ — $ — $ — $ — Net reserve builds (releases) — 5 (2) — 3 6 Total provision for credit losses $ — $ 5 $ (2) $ — $ 3 $ 6 Other, net $ — $ (1) $ — $ — $ — $ (1) Allowance for credit losses on other assets at end of quarter $ — $ 24 $ 8 $ — $ 28 $ 60 (1) Primarily accounts receivable. Allowance for Credit Losses on Other Assets Three Months Ended June 30, 2020 In millions of dollars Cash and due from banks Deposits with banks Securities borrowed and purchased under agreements Brokerage receivables All other assets (1) Total Allowance for credit losses at beginning of quarter $ — $ 8 $ 5 $ — $ 41 $ 54 Adjustment to opening balance for CECL adoption — — — — — — Gross credit losses — — — — — — Gross recoveries — — — — — — Net credit losses (NCLs) $ — $ — $ — $ — $ — $ — Replenishment of NCLs $ — $ — $ — $ — $ — $ — Net reserve builds (releases) — 10 2 — 36 48 Total provision for credit losses $ — $ 10 $ 2 $ — $ 36 $ 48 Other, net $ — $ — $ — $ — $ — $ — Allowance for credit losses on other assets at end of quarter $ — $ 18 $ 7 $ — $ 77 $ 102 Six Months Ended June 30, 2020 In millions of dollars Cash and due from banks Deposits with banks Securities borrowed and purchased under agreements Brokerage receivables All other assets (1) Total Allowance for credit losses at beginning of year $ — $ — $ — $ — $ — $ — Adjustment to opening balance for CECL adoption 6 14 2 1 3 26 Gross credit losses — — — — — — Gross recoveries — — — — — — Net credit losses (NCLs) $ — $ — $ — $ — $ — $ — Replenishment of NCLs $ — $ — $ — $ — $ — $ — Net reserve builds (releases) (6) 4 5 (1) 42 44 Total provision for credit losses $ (6) $ 4 $ 5 $ (1) $ 42 $ 44 Other, net $ — $ — $ — $ — $ 32 $ 32 Allowance for credit losses on other assets at end of year $ — $ 18 $ 7 $ — $ 77 $ 102 (1) Primarily accounts receivable.

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS (Tables)	6 Months Ended
	Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of goodwill	The changes in Goodwill were as follows: In millions of dollars Global Consumer Banking Institutional Clients Group Total Balance at December 31, 2020 $ 12,142 $ 10,020 $ 22,162 Foreign currency translation (68) (189) (257) Balance at March 31, 2021 $ 12,074 $ 9,831 $ 21,905 Foreign currency translation 34 121 155 Balance at June 30, 2021 $ 12,108 $ 9,952 $ 22,060
Components of intangible assets, finite-lived	The components of intangible assets were as follows: June 30, 2021 December 31, 2020 In millions of dollars Gross Accumulated Net Gross Accumulated Net Purchased credit card relationships $ 5,615 $ 4,283 $ 1,332 $ 5,648 $ 4,229 $ 1,419 Credit card contract-related intangibles (1) 3,924 1,323 2,601 3,929 1,276 2,653 Core deposit intangibles 44 44 — 45 44 1 Other customer relationships 434 306 128 455 314 141 Present value of future profits 32 30 2 32 30 2 Indefinite-lived intangible assets 189 — 189 190 — 190 Other 76 60 16 72 67 5 Intangible assets (excluding MSRs) $ 10,314 $ 6,046 $ 4,268 $ 10,371 $ 5,960 $ 4,411 Mortgage servicing rights (MSRs) (2) 419 — 419 336 — 336 Total intangible assets $ 10,733 $ 6,046 $ 4,687 $ 10,707 $ 5,960 $ 4,747 (1) Primarily reflects contract-related intangibles associated with the American Airlines, The Home Depot, Costco and AT&T credit card program agreements, which represented 97% and 96% of the aggregate net carrying amount as of June 30, 2021 and December 31, 2020, respectively. (2) For additional information on Citi’s MSRs, see Note 18 to the Consolidated Financial Statements. The changes in intangible assets were as follows: In millions of dollars Net carrying amount at December 31, 2020 Acquisitions/renewals/ Amortization Impairments FX translation and other Net carrying amount at June 30, 2021 Purchased credit card relationships (1) $ 1,419 $ — $ (86) $ — $ (1) $ 1,332 Credit card contract-related intangibles (2) 2,653 19 (70) (1) — 2,601 Core deposit intangibles 1 — (1) — — — Other customer relationships 141 7 (12) — (8) 128 Present value of future profits 2 — — — — 2 Indefinite-lived intangible assets 190 — — — (1) 189 Other 5 23 (13) — 1 16 Intangible assets (excluding MSRs) $ 4,411 $ 49 $ (182) $ (1) $ (9) $ 4,268 Mortgage servicing rights (MSRs) (3) 336 419 Total intangible assets $ 4,747 $ 4,687 (1) Reflects intangibles for the value of cardholder relationships, which are discrete from partner contract-related intangibles, and include credit card accounts primarily in the Costco, Macy’s and Sears portfolios. (2) Primarily reflects contract-related intangibles associated with the American Airlines, The Home Depot, Costco and AT&T credit card program agreements, which represented 97% and 96% of the aggregate net carrying amount at June 30, 2021 and December 31, 2020, respectively. (3) For additional information on Citi’s MSRs, including the rollforward for the three and six months ended June 30, 2021, see Note 18 to the Consolidated Financial Statements.
Components of intangible assets, indefinite-lived	The components of intangible assets were as follows: June 30, 2021 December 31, 2020 In millions of dollars Gross Accumulated Net Gross Accumulated Net Purchased credit card relationships $ 5,615 $ 4,283 $ 1,332 $ 5,648 $ 4,229 $ 1,419 Credit card contract-related intangibles (1) 3,924 1,323 2,601 3,929 1,276 2,653 Core deposit intangibles 44 44 — 45 44 1 Other customer relationships 434 306 128 455 314 141 Present value of future profits 32 30 2 32 30 2 Indefinite-lived intangible assets 189 — 189 190 — 190 Other 76 60 16 72 67 5 Intangible assets (excluding MSRs) $ 10,314 $ 6,046 $ 4,268 $ 10,371 $ 5,960 $ 4,411 Mortgage servicing rights (MSRs) (2) 419 — 419 336 — 336 Total intangible assets $ 10,733 $ 6,046 $ 4,687 $ 10,707 $ 5,960 $ 4,747 (1) Primarily reflects contract-related intangibles associated with the American Airlines, The Home Depot, Costco and AT&T credit card program agreements, which represented 97% and 96% of the aggregate net carrying amount as of June 30, 2021 and December 31, 2020, respectively. (2) For additional information on Citi’s MSRs, see Note 18 to the Consolidated Financial Statements. The changes in intangible assets were as follows: In millions of dollars Net carrying amount at December 31, 2020 Acquisitions/renewals/ Amortization Impairments FX translation and other Net carrying amount at June 30, 2021 Purchased credit card relationships (1) $ 1,419 $ — $ (86) $ — $ (1) $ 1,332 Credit card contract-related intangibles (2) 2,653 19 (70) (1) — 2,601 Core deposit intangibles 1 — (1) — — — Other customer relationships 141 7 (12) — (8) 128 Present value of future profits 2 — — — — 2 Indefinite-lived intangible assets 190 — — — (1) 189 Other 5 23 (13) — 1 16 Intangible assets (excluding MSRs) $ 4,411 $ 49 $ (182) $ (1) $ (9) $ 4,268 Mortgage servicing rights (MSRs) (3) 336 419 Total intangible assets $ 4,747 $ 4,687 (1) Reflects intangibles for the value of cardholder relationships, which are discrete from partner contract-related intangibles, and include credit card accounts primarily in the Costco, Macy’s and Sears portfolios. (2) Primarily reflects contract-related intangibles associated with the American Airlines, The Home Depot, Costco and AT&T credit card program agreements, which represented 97% and 96% of the aggregate net carrying amount at June 30, 2021 and December 31, 2020, respectively. (3) For additional information on Citi’s MSRs, including the rollforward for the three and six months ended June 30, 2021, see Note 18 to the Consolidated Financial Statements.
Changes in intangible assets	The components of intangible assets were as follows: June 30, 2021 December 31, 2020 In millions of dollars Gross Accumulated Net Gross Accumulated Net Purchased credit card relationships $ 5,615 $ 4,283 $ 1,332 $ 5,648 $ 4,229 $ 1,419 Credit card contract-related intangibles (1) 3,924 1,323 2,601 3,929 1,276 2,653 Core deposit intangibles 44 44 — 45 44 1 Other customer relationships 434 306 128 455 314 141 Present value of future profits 32 30 2 32 30 2 Indefinite-lived intangible assets 189 — 189 190 — 190 Other 76 60 16 72 67 5 Intangible assets (excluding MSRs) $ 10,314 $ 6,046 $ 4,268 $ 10,371 $ 5,960 $ 4,411 Mortgage servicing rights (MSRs) (2) 419 — 419 336 — 336 Total intangible assets $ 10,733 $ 6,046 $ 4,687 $ 10,707 $ 5,960 $ 4,747 (1) Primarily reflects contract-related intangibles associated with the American Airlines, The Home Depot, Costco and AT&T credit card program agreements, which represented 97% and 96% of the aggregate net carrying amount as of June 30, 2021 and December 31, 2020, respectively. (2) For additional information on Citi’s MSRs, see Note 18 to the Consolidated Financial Statements. The changes in intangible assets were as follows: In millions of dollars Net carrying amount at December 31, 2020 Acquisitions/renewals/ Amortization Impairments FX translation and other Net carrying amount at June 30, 2021 Purchased credit card relationships (1) $ 1,419 $ — $ (86) $ — $ (1) $ 1,332 Credit card contract-related intangibles (2) 2,653 19 (70) (1) — 2,601 Core deposit intangibles 1 — (1) — — — Other customer relationships 141 7 (12) — (8) 128 Present value of future profits 2 — — — — 2 Indefinite-lived intangible assets 190 — — — (1) 189 Other 5 23 (13) — 1 16 Intangible assets (excluding MSRs) $ 4,411 $ 49 $ (182) $ (1) $ (9) $ 4,268 Mortgage servicing rights (MSRs) (3) 336 419 Total intangible assets $ 4,747 $ 4,687 (1) Reflects intangibles for the value of cardholder relationships, which are discrete from partner contract-related intangibles, and include credit card accounts primarily in the Costco, Macy’s and Sears portfolios. (2) Primarily reflects contract-related intangibles associated with the American Airlines, The Home Depot, Costco and AT&T credit card program agreements, which represented 97% and 96% of the aggregate net carrying amount at June 30, 2021 and December 31, 2020, respectively. (3) For additional information on Citi’s MSRs, including the rollforward for the three and six months ended June 30, 2021, see Note 18 to the Consolidated Financial Statements.

DEBT (Tables)

DEBT (Tables)	6 Months Ended
	Jun. 30, 2021
Debt Disclosure [Abstract]
Schedule of short-term borrowings	In millions of dollars June 30, December 31, Commercial paper Bank (1) $ 8,974 $ 10,022 Broker-dealer and other (2) 9,692 7,988 Total commercial paper $ 18,666 $ 18,010 Other borrowings (3) 12,796 11,504 Total $ 31,462 $ 29,514 (1) Represents Citibank entities as well as other bank entities. (2) Represents broker-dealer and other non-bank subsidiaries that are consolidated into Citigroup Inc., the parent holding company. (3) Includes borrowings from Federal Home Loan Banks and other market participants. At June 30, 2021 and December 31, 2020, collateralized short-term advances from the Federal Home Loan Banks were $2.0 billion and $4.0 billion, respectively.
Schedule of long-term debt	In millions of dollars June 30, December 31, 2020 Citigroup Inc. (1) $ 174,366 $ 170,563 Bank (2) 28,661 44,742 Broker-dealer and other (3) 61,548 56,381 Total $ 264,575 $ 271,686 (1) Represents the parent holding company. (2) Represents Citibank entities as well as other bank entities. At June 30, 2021 and December 31, 2020, collateralized long-term advances from the Federal Home Loan Banks were $9.5 billion and $10.9 billion, respectively. (3) Represents broker-dealer and other non-bank subsidiaries that are consolidated into Citigroup Inc., the parent holding company. Certain Citigroup consolidated hedging activities are also included in this line.
Summary of outstanding trust preferred securities	The following table summarizes Citi’s outstanding trust preferred securities at June 30, 2021: Junior subordinated debentures owned by trust Trust Issuance Securities Liquidation value (1) Coupon rate (2) Common Amount Maturity Redeemable In millions of dollars, except securities and share amounts Citigroup Capital III Dec. 1996 194,053 $ 194 7.625 % 6,003 $ 200 Dec. 1, 2036 Not redeemable Citigroup Capital XIII Sept. 2010 89,840,000 2,246 3 mo. LIBOR + 637 bps 1,000 2,246 Oct. 30, 2040 Oct. 30, 2015 Citigroup Capital XVIII Jun. 2007 99,901 138 3 mo. sterling LIBOR + 88.75 bps 50 138 Jun. 28, 2067 Jun. 28, 2017 Total obligated $ 2,578 $ 2,584 Note: Distributions on the trust preferred securities and interest on the subordinated debentures are payable semiannually for Citigroup Capital III and Citigroup Capital XVIII and quarterly for Citigroup Capital XIII. (1) Represents the notional value received by outside investors from the trusts at the time of issuance. This differs from Citi’s balance sheet carrying value due primarily to unamortized discount and issuance costs.

CHANGES IN ACCUMULATED OTHER _2

CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI) (Tables)	6 Months Ended
	Jun. 30, 2021
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Changes in each component of accumulated other comprehensive income (loss)	Changes in each component of Citigroup’s Accumulated other comprehensive income (loss) were as follows: Three and Six Months Ended June 30, 2021 In millions of dollars Net Debt valuation adjustment (DVA) (1) Cash flow hedges (2) Benefit plans (3) Foreign (4) Excluded component of fair value hedges Accumulated Three Months Ended June 30, 2021 Balance, March 31, 2021 $ 1,535 $ (1,461) $ 1,037 $ (6,150) $ (29,915) $ (57) $ (35,011) Other comprehensive income before (379) (72) 28 36 523 (11) 125 Increase (decrease) due to amounts reclassified from AOCI (95) 10 (201) 51 — 1 (234) Change, net of taxes $ (474) $ (62) $ (173) $ 87 $ 523 $ (10) $ (109) Balance at June 30, 2021 $ 1,061 $ (1,523) $ 864 $ (6,063) $ (29,392) $ (67) $ (35,120) Six Months Ended June 30, 2021 Balance, December 31, 2020 $ 3,320 $ (1,419) $ 1,593 $ (6,864) $ (28,641) $ (47) $ (32,058) Other comprehensive income before (1,898) (156) (316) 689 (751) (21) (2,453) Increase (decrease) due to amounts reclassified from AOCI (361) 52 (413) 112 — 1 (609) Change, net of taxes $ (2,259) $ (104) $ (729) $ 801 $ (751) $ (20) $ (3,062) Balance at June 30, 2021 $ 1,061 $ (1,523) $ 864 $ (6,063) $ (29,392) $ (67) $ (35,120) Footnotes to the table above appear on the following page. Three and Six Months Ended June 30, 2020 In millions of dollars Net Debt valuation adjustment (DVA) (1) Cash flow hedges (2) Benefit plans (3) Foreign of hedges (4) Excluded component of fair value hedges Accumulated Three Months Ended June 30, 2020 Balance, March 31, 2020 $ 2,863 $ 2,196 $ 2,020 $ (7,095) $ (32,500) $ (5) $ (32,521) Other comprehensive income before 1,391 (2,204) 226 (132) 561 13 (145) Increase (decrease) due to amounts reclassified from AOCI (554) (28) (152) 55 — — (679) Change, net of taxes $ 837 $ (2,232) $ 74 $ (77) $ 561 $ 13 $ (824) Balance at June 30, 2020 $ 3,700 $ (36) $ 2,094 $ (7,172) $ (31,939) $ 8 $ (33,345) Six Months Ended June 30, 2020 Balance, December 31, 2019 $ (265) $ (944) $ 123 $ (6,809) $ (28,391) $ (32) $ (36,318) Other comprehensive income before 4,795 913 2,124 (476) (3,548) 40 3,848 Increase (decrease) due to amounts reclassified from AOCI (830) (5) (153) 113 — — (875) Change, net of taxes $ 3,965 $ 908 $ 1,971 $ (363) $ (3,548) $ 40 $ 2,973 Balance at June 30, 2020 $ 3,700 $ (36) $ 2,094 $ (7,172) $ (31,939) $ 8 $ (33,345) (1) Reflects the after-tax valuation of Citi’s fair value options liabilities. See “Market Valuation Adjustments” in Note 20 to the Consolidated Financial Statements. (2) Primarily driven by Citigroup’s pay fixed/receive floating interest rate swap programs that hedge the floating rates on liabilities. (3) Primarily reflects adjustments based on the quarterly actuarial valuations of the Company’s significant pension and postretirement plans, annual actuarial valuations of all other plans and amortization of amounts previously recognized in other comprehensive income. (4) Primarily reflects the movements in (by order of impact) the Mexican peso, Brazilian real, Polish zloty, New Taiwan dollar, Euro and Indian rupee against the U.S. dollar and changes in related tax effects and hedges for the three months ended June 30, 2021. Primarily reflects the movements in (by order of impact) the South Korean won, Japanese yen, Euro, Indian rupee, Mexican peso and New Taiwan dollar against the U.S. dollar and changes in related tax effects and hedges for the six months ended June 30, 2021. Primarily reflects the movements in (by order of impact) the Australian dollar, South Korean won, Indonesian rupiah and Euro against the U.S. dollar and changes in related tax effects and hedges for the three months ended June 30, 2020. Primarily reflects the movements in (by order of impact) the Mexican peso, Brazilian real, Indian rupee and Chilean peso against the U.S. dollar and changes in related tax effects and hedges for the six months ended June 30, 2020. Amounts recorded in the CTA component of AOCI remain in AOCI
Schedule of pretax and after-tax changes in each component of accumulated other comprehensive income (loss)	The pretax and after-tax changes in each component of Accumulated other comprehensive income (loss) were as follows: Three and Six Months Ended June 30, 2021 In millions of dollars Pretax Tax effect After-tax Three Months Ended June 30, 2021 Balance, March 31, 2021 $ (40,631) $ 5,620 $ (35,011) Change in net unrealized gains (losses) on debt securities (638) 164 (474) Debt valuation adjustment (DVA) (110) 48 (62) Cash flow hedges (224) 51 (173) Benefit plans 84 3 87 Foreign currency translation adjustment 445 78 523 Excluded component of fair value hedges (13) 3 (10) Change $ (456) $ 347 $ (109) Balance at June 30, 2021 $ (41,087) $ 5,967 $ (35,120) Six Months Ended June 30, 2021 Balance, December 31, 2020 $ (36,992) $ 4,934 $ (32,058) Change in net unrealized gains (losses) on debt securities (3,065) 806 (2,259) Debt valuation adjustment (DVA) (148) 44 (104) Cash flow hedges (953) 224 (729) Benefit plans 991 (190) 801 Foreign currency translation adjustment (894) 143 (751) Excluded component of fair value hedges (26) 6 (20) Change $ (4,095) $ 1,033 $ (3,062) Balance at June 30, 2021 $ (41,087) $ 5,967 $ (35,120) Three and Six Months Ended June 30, 2020 In millions of dollars Pretax Tax effect After-tax Three Months Ended June 30, 2020 Balance, March 31, 2020 $ (36,419) $ 3,898 $ (32,521) Change in net unrealized gains (losses) on debt securities 1,178 (341) 837 Debt valuation adjustment (DVA) (2,935) 703 (2,232) Cash flow hedges 90 (16) 74 Benefit plans (93) 16 (77) Foreign currency translation adjustment 485 76 561 Excluded component of fair value hedges 16 (3) 13 Change $ (1,259) $ 435 $ (824) Balance, June 30, 2020 $ (37,678) $ 4,333 $ (33,345) Six Months Ended June 30, 2020 Balance, December 31, 2019 $ (42,772) $ 6,454 $ (36,318) Change in net unrealized gains (losses) on debt securities 5,298 (1,333) 3,965 Debt valuation adjustment (DVA) 1,253 (345) 908 Cash flow hedges 2,574 (603) 1,971 Benefit plans (510) 147 (363) Foreign currency translation adjustment (3,570) 22 (3,548) Excluded component of fair value hedges 49 (9) 40 Change $ 5,094 $ (2,121) $ 2,973 Balance, June 30, 2020 $ (37,678) $ 4,333 $ (33,345)
Summary of amounts reclassified out of accumulated other comprehensive income (loss) into the consolidated statement of income	The Company recognized pretax gains (losses) related to amounts in AOCI reclassified to the Consolidated Statement of Income as follows: Increase (decrease) in AOCI due to Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Realized (gains) losses on sales of investments $ (137) $ (748) $ (538) $ (1,180) Gross impairment losses 9 19 78 71 Subtotal, pretax $ (128) $ (729) $ (460) $ (1,109) Tax effect 33 175 99 279 Net realized (gains) losses on investments after-tax (1) $ (95) $ (554) $ (361) $ (830) Realized DVA (gains) losses on fair value option liabilities, pretax $ 13 $ (37) $ 69 $ (6) Tax effect (3) 9 (17) 1 Net realized debt valuation adjustment, after-tax $ 10 $ (28) $ 52 $ (5) Interest rate contracts $ (266) $ (200) $ (544) $ (203) Foreign exchange contracts 1 1 2 2 Subtotal, pretax $ (265) $ (199) $ (542) $ (201) Tax effect 64 47 129 48 Amortization of cash flow hedges, after-tax (2) $ (201) $ (152) $ (413) $ (153) Amortization of unrecognized: Prior service cost (benefit) $ (6) $ (3) $ (12) $ (6) Net actuarial loss 71 75 158 154 Curtailment/settlement impact (3) 4 3 4 3 Subtotal, pretax $ 69 $ 75 $ 150 $ 151 Tax effect (18) (20) (38) (38) Amortization of benefit plans, after-tax (3) $ 51 $ 55 $ 112 $ 113 Excluded component of fair value hedges, pretax $ 1 $ 1 Tax effect — — — — Excluded component of fair value hedges, after-tax $ 1 $ — $ 1 $ — Foreign currency translation adjustment, pretax $ — $ — $ — $ — Tax effect — — — — Foreign currency translation adjustment, after-tax $ — $ — $ — $ — Total amounts reclassified out of AOCI , pretax $ (310) $ (890) $ (782) $ (1,165) Total tax effect 76 211 173 290 Total amounts reclassified out of AOCI , after-tax $ (234) $ (679) $ (609) $ (875) (1) The pretax amount is reclassified to Realized gains (losses) on sales of investments, net and Gross impairment losses in the Consolidated Statement of Income. See Note 12 to the Consolidated Financial Statements for additional details. (2) See Note 19 to the Consolidated Financial Statements for additional details. (3) See Note 8 to the Consolidated Financial Statements for additional details.

SECURITIZATIONS AND VARIABLE _2

SECURITIZATIONS AND VARIABLE INTEREST ENTITIES (Tables)	6 Months Ended
	Jun. 30, 2021
Securitizations and Variable Interest Entities [Abstract]
Schedule of consolidated and unconsolidated VIEs with which the Company holds significant variable interests	Citigroup’s involvement with consolidated and unconsolidated VIEs with which the Company holds significant variable interests or has continuing involvement through servicing a majority of the assets in a VIE is presented below: As of June 30, 2021 Maximum exposure to loss in significant unconsolidated VIEs (1) Funded exposures (2) Unfunded exposures In millions of dollars Total Consolidated Significant unconsolidated VIE assets (3) Debt Equity Funding Guarantees Total Credit card securitizations $ 30,948 $ 30,948 $ — $ — $ — $ — $ — $ — Mortgage securitizations (4) U.S. agency-sponsored 114,664 — 114,664 1,533 — — 50 1,583 Non-agency-sponsored 57,157 773 56,384 2,893 — 5 — 2,898 Citi-administered asset-backed commercial paper conduits 14,566 14,566 — — — — — — Collateralized loan obligations (CLOs) 11,430 — 11,430 3,529 — — — 3,529 Asset-based financing (5) 256,827 8,657 248,170 29,196 1,195 10,255 — 40,646 Municipal securities tender option bond trusts (TOBs) 3,302 915 2,387 — — 1,523 — 1,523 Municipal investments 21,914 — 21,914 2,662 3,797 3,539 — 9,998 Client intermediation 911 470 441 75 — — 56 131 Investment funds 483 158 325 2 — 13 1 16 Other — — — — — — — — Total $ 512,202 $ 56,487 $ 455,715 $ 39,890 $ 4,992 $ 15,335 $ 107 $ 60,324 As of December 31, 2020 Maximum exposure to loss in significant unconsolidated VIEs (1) Funded exposures (2) Unfunded exposures In millions of dollars Total Consolidated Significant unconsolidated VIE assets (3) Debt Equity Funding Guarantees Total Credit card securitizations $ 32,420 $ 32,420 $ — $ — $ — $ — $ — $ — Mortgage securitizations (4) U.S. agency-sponsored 123,999 — 123,999 1,948 — — 61 2,009 Non-agency-sponsored 46,132 939 45,193 2,550 — 2 1 2,553 Citi-administered asset-backed commercial paper conduits 16,730 16,730 — — — — — — Collateralized loan obligations (CLOs) 18,332 — 18,332 4,273 — — — 4,273 Asset-based financing (5) 222,274 8,069 214,205 25,153 1,587 9,114 — 35,854 Municipal securities tender option bond trusts (TOBs) 3,349 835 2,514 — — 1,611 — 1,611 Municipal investments 20,335 — 20,335 2,569 4,056 3,041 — 9,666 Client intermediation 1,352 910 442 88 — — 56 144 Investment funds 488 153 335 — — 15 — 15 Other — — — — — — — — Total $ 485,411 $ 60,056 $ 425,355 $ 36,581 $ 5,643 $ 13,783 $ 118 $ 56,125 (1) The definition of maximum exposure to loss is included in the text that follows this table. (2) Included on Citigroup’s June 30, 2021 and December 31, 2020 Consolidated Balance Sheet. (3) A significant unconsolidated VIE is an entity in which the Company has any variable interest or continuing involvement considered to be significant, regardless of the likelihood of loss. (4) Citigroup mortgage securitizations also include agency and non-agency (private label) re-securitization activities. These SPEs are not consolidated. See “Re-securitizations” below for further discussion. (5) Included within this line are loans to third-party sponsored private equity funds, which represent $109 billion and $78 billion in unconsolidated VIE assets and $507 million and $425 million in maximum exposure to loss as of June 30, 2021 and December 31, 2020, respectively.
Schedule of funding commitments of unconsolidated Variable Interest Entities	The following table presents the notional amount of liquidity facilities and loan commitments that are classified as funding commitments in the VIE tables above: June 30, 2021 December 31, 2020 In millions of dollars Liquidity Loan/equity Liquidity Loan/equity Non-agency-sponsored mortgage securitizations $ — $ 5 $ — $ 2 Asset-based financing — 10,255 — 9,114 Municipal securities tender option bond trusts (TOBs) 1,523 — 1,611 — Municipal investments — 3,539 — 3,041 Investment funds — 13 — 15 Other — — — — Total funding commitments $ 1,523 $ 13,812 $ 1,611 $ 12,172
Schedule of significant interests in unconsolidated VIEs - balance sheet classification	The following table presents the carrying amounts and classification of significant variable interests in unconsolidated VIEs: In billions of dollars June 30, 2021 December 31, 2020 Cash $ — $ — Trading account assets 1.4 2.0 Investments 9.6 10.6 Total loans, net of allowance 33.2 29.3 Other 0.7 0.3 Total assets $ 44.9 $ 42.2
Schedule of securitized credit card receivables	The following table reflects amounts related to the Company’s securitized credit card receivables: In billions of dollars June 30, 2021 December 31, 2020 Ownership interests in principal amount of trust credit card receivables Sold to investors via trust-issued securities $ 11.0 $ 15.7 Retained by Citigroup as trust-issued securities 7.2 7.9 Retained by Citigroup via non-certificated interests 14.6 11.1 Total $ 32.8 $ 34.7 The following tables summarize selected cash flow information related to Citigroup’s credit card securitizations: Three Months Ended June 30, In billions of dollars 2021 2020 Proceeds from new securitizations $ — $ — Pay down of maturing notes (1.1) (3.2) Six Months Ended In billions of dollars 2021 2020 Proceeds from new securitizations $ — $ — Pay down of maturing notes (4.7) (3.2)
Schedule of Master Trust liabilities (at par value)	In billions of dollars Jun. 30, 2021 Dec. 31, 2020 Term notes issued to third parties $ 9.7 $ 13.9 Term notes retained by Citigroup affiliates 2.2 2.7 Total Master Trust liabilities $ 11.9 $ 16.6
Schedule of Omni Trust liabilities (at par value)	In billions of dollars Jun. 30, 2021 Dec. 31, 2020 Term notes issued to third parties $ 1.3 $ 1.8 Term notes retained by Citigroup affiliates 5.0 5.2 Total Omni Trust liabilities $ 6.3 $ 7.0
Schedule of cash flow information, mortgage securitizations	The following tables summarize selected cash flow information and retained interests related to Citigroup mortgage securitizations: Three Months Ended June 30, 2021 2020 In billions of dollars U.S. agency- Non-agency- U.S. agency- Non-agency- Principal securitized $ 1.9 $ 7.1 $ 2.4 $ 0.9 Proceeds from new securitizations 1.9 7.2 2.6 0.9 Purchases of previously transferred financial assets — — — — Six Months Ended June 30, 2021 2020 In billions of dollars U.S. agency- Non-agency- U.S. agency- Non-agency- Principal securitized $ 4.9 $ 18.1 $ 4.5 $ 1.6 Proceeds from new securitizations 5.1 17.8 4.7 3.4 Purchases of previously transferred financial assets 0.1 — 0.1 — Note: Excludes re-securitization transactions.
Schedule of carrying value of retained interests	June 30, 2021 December 31, 2020 Non-agency-sponsored mortgages (1) Non-agency-sponsored mortgages (1) In millions of dollars U.S. agency- Senior (2) Subordinated U.S. agency- Senior Subordinated Carrying value of retained interests (3) $ 388 $ 2,393 $ 479 $ 315 $ 1,210 $ 145 (1) Disclosure of non-agency-sponsored mortgages as senior and subordinated interests is indicative of the interests’ position in the capital structure of the securitization. (2) Senior interests in non-agency-sponsored mortgages include $93 million related to personal loan securitizations at June 30, 2021. (3) Retained interests consist of Level 2 and Level 3 assets depending on the observability of significant inputs. See Note 20 to the Consolidated Financial Statements for more information about fair value measurements.
Schedule of key assumptions used in measuring fair value of retained interest at the date of sale or securitization of mortgage receivables	Key assumptions used in measuring the fair value of retained interests at the date of sale or securitization of mortgage receivables were as follows: Three Months Ended June 30, 2021 Non-agency-sponsored mortgages (1) U.S. agency- sponsored mortgages Senior interests Subordinated interests Weighted average discount rate 9.0 % 1.8 % 2.8 % Weighted average constant prepayment rate 4.2 % — % 10.0 % Weighted average anticipated net credit losses (2) NM — % 1.0 % Weighted average life 7.8 years 6.7 years 5.7 years Three Months Ended June 30, 2020 Non-agency-sponsored mortgages (1) U.S. agency- Senior Subordinated Weighted average discount rate 3.5 % 6.2 % 3.0 % Weighted average constant prepayment rate 28.7 % — % 25.0 % Weighted average anticipated net credit losses (2) NM — % 0.5 % Weighted average life 4.1 years 9.8 years 2.3 years Six Months Ended June 30, 2021 Non-agency-sponsored mortgages (1) U.S. agency- sponsored mortgages Senior interests Subordinated interests Weighted average discount rate 8.9 % 0.4 % 2.9 % Weighted average constant prepayment rate 5.0 % — % 10.3 % Weighted average anticipated net credit losses (2) NM 0.4 % 1.1 % Weighted average life 7.8 years 3.4 years 5.5 years Six Months Ended June 30, 2020 Non-agency-sponsored mortgages (1) U.S. agency- Senior Subordinated Weighted average discount rate 6.0 % 1.8 % 3.0 % Weighted average constant prepayment rate 27.1 % — % 25.0 % Weighted average anticipated net credit losses (2) NM 1.6 % 0.5 % Weighted average life 4.7 years 4.8 years 2.3 years (1) Disclosure of non-agency-sponsored mortgages as senior and subordinated interests is indicative of the interests’ position in the capital structure of the securitization. (2) Anticipated net credit losses represent estimated loss severity associated with defaulted mortgage loans underlying the mortgage securitizations disclosed above. Anticipated net credit losses, in this instance, do not represent total credit losses incurred to date, nor do they represent credit losses expected on retained interests in mortgage securitizations. NM Anticipated net credit losses are not meaningful due to U.S. agency guarantees. The interests retained by the Company range from highly rated and/or senior in the capital structure to unrated and/or residual interests. Key assumptions used in measuring the fair value of retained interests in securitizations of mortgage receivables at period end were as follows: June 30, 2021 Non-agency-sponsored mortgages (1) U.S. agency- Senior Subordinated Weighted average discount rate 6.4 % 7.9 % 3.0 % Weighted average constant prepayment rate 12.5 % 4.5 % 4.6 % Weighted average anticipated net credit losses (2) NM 1.0 % 1.2 % Weighted average life 5.5 years 4.7 years 18.2 years December 31, 2020 Non-agency-sponsored mortgages (1) U.S. agency- Senior Subordinated Weighted average discount rate 5.9 % 7.2 % 4.3 % Weighted average constant prepayment rate 22.7 % 5.3 % 4.7 % Weighted average anticipated net credit losses (2) NM 1.2 % 1.4 % Weighted average life 4.5 years 5.3 years 4.7 years (1) Disclosure of non-agency-sponsored mortgages as senior and subordinated interests is indicative of the interests’ position in the capital structure of the securitization. (2) Anticipated net credit losses represent estimated loss severity associated with defaulted mortgage loans underlying the mortgage securitizations disclosed above. Anticipated net credit losses, in this instance, do not represent total credit losses incurred to date, nor do they represent credit losses expected on retained interests in mortgage securitizations. NM Anticipated net credit losses are not meaningful due to U.S. agency guarantees.
Schedule of key assumptions used to value retained interests and sensitivity of adverse changes of 10% and 20%, mortgage securitizations	June 30, 2021 Non-agency-sponsored mortgages In millions of dollars U.S. agency- sponsored mortgages Senior interests Subordinated interests Discount rate Adverse change of 10% $ (9) $ — $ (1) Adverse change of 20% (18) — (2) Constant prepayment rate Adverse change of 10% (20) — — Adverse change of 20% (38) — — Anticipated net credit losses Adverse change of 10% NM — — Adverse change of 20% NM — — December 31, 2020 Non-agency-sponsored mortgages In millions of dollars U.S. agency- Senior Subordinated Discount rate Adverse change of 10% $ (8) $ — $ (1) Adverse change of 20% (15) (1) (1) Constant prepayment rate Adverse change of 10% (21) — — Adverse change of 20% (40) — — Anticipated net credit losses Adverse change of 10% NM — — Adverse change of 20% NM — — NM Anticipated net credit losses are not meaningful due to U.S. agency guarantees.
Schedule of information about loan delinquencies and liquidation losses for assets held in non-consolidated, non-agency-sponsored securitization entities	The following table includes information about loan delinquencies and liquidation losses for assets held in non-consolidated, non-agency-sponsored securitization entities: Liquidation losses Securitized assets 90 days past due Three Months Ended June 30, Six Months Ended June 30, In billions of dollars, except liquidation losses in millions Jun. 30, 2021 Dec. 31, 2020 Jun. 30, 2021 Dec. 31, 2020 2021 2020 2021 2020 Securitized assets Residential mortgages (1) $ 28.7 $ 16.9 $ 0.4 $ 0.5 $ 5 $ 7 $ 6.6 $ 18 Commercial and other 25.8 23.9 — — — — — — Total $ 54.5 $ 40.8 $ 0.4 $ 0.5 $ 5 $ 7 $ 6.6 $ 18
Schedule of changes in capitalized MSRs	The following table summarizes the changes in capitalized MSRs: Three Months Ended June 30, Six Months Ended In millions of dollars 2021 2020 2021 2020 Balance, beginning of period $ 433 $ 367 $ 336 $ 495 Originations 25 24 68 56 Changes in fair value of MSRs due to changes in inputs and assumptions (21) (26) 52 (169) Other changes (1) (18) (20) (37) (37) Sales of MSRs — — — — Balance, as of June 30 $ 419 $ 345 $ 419 $ 345 (1) Represents changes due to customer payments and passage of time.
Schedule of fees received on servicing previously securitized mortgages	The amounts of these fees were as follows: Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Servicing fees $ 37 $ 34 $ 68 $ 73 Late fees — 1 1 3 Ancillary fees — — — — Total MSR fees $ 37 $ 35 $ 69 $ 76
Schedule of sensitivity of adverse changes of 10% and 20% to discount rate, CDOs and CLOs	The following table summarizes selected retained interests related to Citigroup CLOs: In millions of dollars Jun. 30, 2021 Dec. 31, 2020 Carrying value of retained interests $ 1,574 $ 1,611
Schedule of asset-based financing	June 30, 2021 In millions of dollars Total unconsolidated VIE assets Maximum exposure to unconsolidated VIEs Type Commercial and other $ 33,341 $ 7,073 Corporate loans 15,963 10,588 Other (including investment funds, airlines and shipping) 198,866 22,985 Total $ 248,170 $ 40,646 December 31, 2020 In millions of dollars Total unconsolidated VIE assets Maximum exposure to unconsolidated VIEs Type Commercial and other $ 34,570 $ 7,758 Corporate loans 12,022 7,654 Other (including investment funds, airlines and shipping) 167,613 20,442 Total $ 214,205 $ 35,854

DERIVATIVES (Tables)

DERIVATIVES (Tables)	6 Months Ended
	Jun. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative notionals	Information pertaining to Citigroup’s derivatives activities, based on notional amounts, is presented in the table below. Derivative notional amounts are reference amounts from which contractual payments are derived and do not represent a complete measure of Citi’s exposure to derivative transactions. Citi’s derivative exposure arises primarily from market fluctuations (i.e., market risk), counterparty failure (i.e., credit risk) and/or periods of high volatility or financial stress (i.e., liquidity risk), as well as any market valuation adjustments that may be required on the transactions. Moreover, notional amounts do not reflect the netting of offsetting trades. For example, if Citi enters into a receive-fixed interest rate swap with $100 million notional, and offsets this risk with an identical but opposite pay-fixed position with a different counterparty, $200 million in derivative notionals is reported, although these offsetting positions may result in de minimis overall market risk. In addition, aggregate derivative notional amounts can fluctuate from period to period in the normal course of business based on Citi’s market share, levels of client activity and other factors. Derivative Notionals Hedging instruments under Trading derivative instruments In millions of dollars June 30, December 31, June 30, December 31, Interest rate contracts Swaps $ 295,160 $ 334,351 $ 19,629,538 $ 17,724,147 Futures and forwards — — 4,381,531 4,142,514 Written options — — 1,598,478 1,573,483 Purchased options — — 1,472,341 1,418,255 Total interest rate contracts $ 295,160 $ 334,351 $ 27,081,888 $ 24,858,399 Foreign exchange contracts Swaps $ 55,575 $ 65,709 $ 6,495,324 $ 6,567,304 Futures, forwards and spot 42,510 37,080 4,586,090 3,945,391 Written options 24 47 796,584 907,338 Purchased options 26 53 790,172 900,626 Total foreign exchange contracts $ 98,135 $ 102,889 $ 12,668,170 $ 12,320,659 Equity contracts Swaps $ — $ — $ 306,856 $ 274,098 Futures and forwards — — 82,175 67,025 Written options — — 525,671 441,003 Purchased options — — 436,045 328,202 Total equity contracts $ — $ — $ 1,350,747 $ 1,110,328 Commodity and other contracts Swaps $ — $ — $ 90,785 $ 80,127 Futures and forwards 1,929 924 168,072 143,175 Written options — — 68,024 71,376 Purchased options — — 64,810 67,849 Total commodity and other contracts $ 1,929 $ 924 $ 391,691 $ 362,527 Credit derivatives (1) Protection sold $ — $ — $ 563,906 $ 543,607 Protection purchased — — 632,441 612,770 Total credit derivatives $ — $ — $ 1,196,347 $ 1,156,377 Total derivative notionals $ 395,224 $ 438,164 $ 42,688,843 $ 39,808,290 (1) Credit derivatives are arrangements designed to allow one party (protection purchaser) to transfer the credit risk of a “reference asset” to another party (protection seller). These arrangements allow a protection seller to assume the credit risk associated with the reference asset without directly purchasing that asset. The Company enters into credit derivative positions for purposes such as risk management, yield enhancement, reduction of credit concentrations and diversification of overall risk.
Derivative mark-to-market (MTM) receivables/payables	The following tables present the gross and net fair values of the Company’s derivative transactions and the related offsetting amounts as of June 30, 2021 and December 31, 2020. Gross positive fair values are offset against gross negative fair values by counterparty, pursuant to enforceable master netting agreements. Under ASC 815-10-45, payables and receivables in respect of cash collateral received from or paid to a given counterparty pursuant to a credit support annex are included in the offsetting amount if a legal opinion supporting the enforceability of netting and collateral rights has been obtained. GAAP does not permit similar offsetting for security collateral. In addition, the following tables reflect rule changes adopted by clearing organizations that require or allow entities to treat certain derivative assets, liabilities and the related variation margin as settlement of the related derivative fair values for legal and accounting purposes, as opposed to presenting gross derivative assets and liabilities that are subject to collateral, whereby the counterparties would also record a related collateral payable or receivable. As a result, the tables reflect a reduction of approximately $275 billion and $280 billion as of June 30, 2021 and December 31, 2020, respectively, of derivative assets and derivative liabilities that previously would have been reported on a gross basis, but are now legally settled and not subject to collateral. The tables also present amounts that are not permitted to be offset, such as security collateral or cash collateral posted at third-party custodians, but which would be eligible for offsetting to the extent that an event of default has occurred and a legal opinion supporting enforceability of the netting and collateral rights has been obtained. Derivative Mark-to-Market (MTM) Receivables/Payables In millions of dollars at June 30, 2021 Derivatives classified in (1)(2) Derivatives instruments designated as ASC 815 hedges Assets Liabilities Over-the-counter $ 1,331 $ 38 Cleared 88 148 Interest rate contracts $ 1,419 $ 186 Over-the-counter $ 879 $ 1,342 Cleared — 3 Foreign exchange contracts $ 879 $ 1,345 Total derivatives instruments designated as ASC 815 hedges $ 2,298 $ 1,531 Derivatives instruments not designated as ASC 815 hedges Over-the-counter $ 172,044 $ 157,764 Cleared 12,425 10,770 Exchange traded 89 21 Interest rate contracts $ 184,558 $ 168,555 Over-the-counter $ 117,330 $ 115,100 Cleared 362 290 Foreign exchange contracts $ 117,692 $ 115,390 Over-the-counter $ 28,687 $ 40,156 Cleared — 1 Exchange traded 19,828 19,770 Equity contracts $ 48,515 $ 59,927 Over-the-counter $ 23,419 $ 25,917 Exchange traded 1,778 2,269 Commodity and other contracts $ 25,197 $ 28,186 Over-the-counter $ 7,108 $ 7,206 Cleared 2,744 3,271 Credit derivatives $ 9,852 $ 10,477 Total derivatives instruments not designated as ASC 815 hedges $ 385,814 $ 382,535 Total derivatives $ 388,112 $ 384,066 Cash collateral paid/received (3) $ 22,104 $ 17,965 Less: Netting agreements (4) (293,047) (293,047) Less: Netting cash collateral received/paid (5) (43,554) (48,079) Net receivables/payables included on the Consolidated Balance Sheet (6) $ 73,615 $ 60,905 Additional amounts subject to an enforceable master netting agreement, but not offset on the Consolidated Balance Sheet Less: Cash collateral received/paid $ (982) $ (1,586) Less: Non-cash collateral received/paid (6,800) (13,639) Total net receivables/payables (6) $ 65,833 $ 45,680 (1) The derivatives fair values are also presented in Note 20 to the Consolidated Financial Statements. (2) Over-the-counter (OTC) derivatives are derivatives executed and settled bilaterally with counterparties without the use of an organized exchange or central clearing house. Cleared derivatives include derivatives executed bilaterally with a counterparty in the OTC market, but then novated to a central clearing house, whereby the central clearing house becomes the counterparty to both of the original counterparties. Exchange-traded derivatives include derivatives executed directly on an organized exchange that provides pre-trade price transparency. (3) Reflects the net amount of the $70,183 million and $61,519 million of gross cash collateral paid and received, respectively. Of the gross cash collateral paid, $48,079 million was used to offset trading derivative liabilities. Of the gross cash collateral received, $43,554 million was used to offset trading derivative assets. (4) Represents the netting of balances with the same counterparty under enforceable netting agreements. Approximately $262 billion, $12 billion and $19 billion of the netting against trading account asset/liability balances is attributable to each of the OTC, cleared and exchange-traded derivatives, respectively. (5) Represents the netting of cash collateral paid and received by counterparties under enforceable credit support agreements. Substantially all netting of cash collateral received and paid is against OTC derivative assets and liabilities, respectively. (6) The net receivables/payables include approximately $12 billion of derivative asset and $13 billion of derivative liability fair values not subject to enforceable master netting agreements, respectively. In millions of dollars at December 31, 2020 Derivatives classified in (1)(2) Derivatives instruments designated as ASC 815 hedges Assets Liabilities Over-the-counter $ 1,781 $ 161 Cleared 74 319 Interest rate contracts $ 1,855 $ 480 Over-the-counter $ 2,037 $ 2,042 Foreign exchange contracts $ 2,037 $ 2,042 Total derivatives instruments designated as ASC 815 hedges $ 3,892 $ 2,522 Derivatives instruments not designated as ASC 815 hedges Over-the-counter $ 228,519 $ 209,330 Cleared 11,041 12,563 Exchange traded 46 38 Interest rate contracts $ 239,606 $ 221,931 Over-the-counter $ 153,791 $ 152,784 Cleared 842 1,239 Exchange traded — 1 Foreign exchange contracts $ 154,633 $ 154,024 Over-the-counter $ 29,244 $ 41,036 Cleared 1 18 Exchange traded 21,274 22,515 Equity contracts $ 50,519 $ 63,569 Over-the-counter $ 13,659 $ 17,076 Exchange traded 879 1,017 Commodity and other contracts $ 14,538 $ 18,093 Over-the-counter $ 7,826 $ 7,951 Cleared 1,963 2,178 Credit derivatives $ 9,789 $ 10,129 Total derivatives instruments not designated as ASC 815 hedges $ 469,085 $ 467,746 Total derivatives $ 472,977 $ 470,268 Cash collateral paid/received (3) $ 32,778 $ 8,196 Less: Netting agreements (4) (364,879) (364,879) Less: Netting cash collateral received/paid (5) (63,915) (45,628) Net receivables/payables included on the Consolidated Balance Sheet (6) $ 76,961 $ 67,957 Additional amounts subject to an enforceable master netting agreement, but not offset on the Consolidated Balance Sheet Less: Cash collateral received/paid $ (1,567) $ (473) Less: Non-cash collateral received/paid (7,408) (13,087) Total net receivables/payables (6) $ 67,986 $ 54,397 (1) The derivatives fair values are also presented in Note 20 to the Consolidated Financial Statements. (2) Over-the-counter (OTC) derivatives are derivatives executed and settled bilaterally with counterparties without the use of an organized exchange or central clearing house. Cleared derivatives include derivatives executed bilaterally with a counterparty in the OTC market, but then novated to a central clearing house, whereby the central clearing house becomes the counterparty to both of the original counterparties. Exchange-traded derivatives include derivatives executed directly on an organized exchange that provides pre-trade price transparency. (3) Reflects the net amount of the $78,406 million and $72,111 million of gross cash collateral paid and received, respectively. Of the gross cash collateral paid, $45,628 million was used to offset trading derivative liabilities. Of the gross cash collateral received, $63,915 million was used to offset trading derivative assets. (4) Represents the netting of balances with the same counterparty under enforceable netting agreements. Approximately $336 billion, $9 billion and $20 billion of the netting against trading account asset/liability balances is attributable to each of the OTC, cleared and exchange-traded derivatives, respectively. (5) Represents the netting of cash collateral paid and received by counterparties under enforceable credit support agreements. Substantially all netting of cash collateral received and paid is against OTC derivative assets and liabilities, respectively. (6) The net receivables/payables include approximately $6 billion of derivative asset and $8 billion of derivative liability fair values not subject to enforceable master netting agreements, respectively.
Schedule of gains (losses) on derivatives not designated in a qualifying hedging relationship recognized in Other revenue and gains (losses) on fair value hedges	The amounts recognized in Other revenue in the Consolidated Statement of Income related to derivatives not designated in a qualifying hedging relationship are shown below. The table below does not include any offsetting gains (losses) on the economically hedged items to the extent that such amounts are also recorded in Other revenue . Gains (losses) included in Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Interest rate contracts $ (15) $ 19 $ (75) $ 174 Foreign exchange (13) (61) (34) (37) Total $ (28) $ (42) $ (109) $ 137 The following table summarizes the gains (losses) on the Company’s fair value hedges: Gains (losses) on fair value hedges (1) Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 In millions of dollars Other revenue Net interest revenue Other revenue Net interest revenue Other Net interest revenue Other revenue Net interest revenue Gain (loss) on the hedging derivatives included in assessment of the effectiveness of fair value hedges Interest rate hedges $ — $ 454 $ — $ 239 $ — $ (3,481) $ — $ 7,086 Foreign exchange hedges 220 — 434 — 10 — (1,477) — Commodity hedges (277) — (381) — (566) — (91) — Total gain (loss) on the hedging derivatives included in assessment of the effectiveness of fair value hedges $ (57) $ 454 $ 53 $ 239 $ (556) $ (3,481) $ (1,568) $ 7,086 Gain (loss) on the hedged item in designated and qualifying fair value hedges Interest rate hedges $ — $ (559) $ — $ (313) $ — $ 3,267 $ — $ (7,128) Foreign exchange hedges (220) — (434) — (10) — 1,477 — Commodity hedges 277 — 381 — 566 — 91 — Total gain (loss) on the hedged item in designated and qualifying fair value hedges $ 57 $ (559) $ (53) $ (313) $ 556 $ 3,267 $ 1,568 $ (7,128) Net gain (loss) on the hedging derivatives excluded from Interest rate hedges $ — $ 1 $ — $ (18) $ — $ (3) $ — $ (23) Foreign exchange hedges (2) 13 — 17 — 17 — (41) — Commodity hedges (53) — 15 — (75) — (10) — Total net gain (loss) on the hedging derivatives excluded from assessment of the effectiveness of fair value hedges $ (40) $ 1 $ 32 $ (18) $ (58) $ (3) $ (51) $ (23) (1) Gain (loss) amounts for interest rate risk hedges are included in Interest income/Interest expense . The accrued interest income on fair value hedges is recorded in Net interest revenue and is excluded from this table. (2) Amounts relate to the premium associated with forward contracts (differential between spot and contractual forward rates) that are excluded from the assessment of hedge effectiveness and are generally reflected directly in earnings. Amounts related to cross-currency basis, which are recognized in AOCI , are not reflected in the table above. The amount of cross-currency basis included in AOCI was $(13) million and $(26) million for the three and six months ended June 30, 2021 and $16 million and $49 million for the three and six months ended June 30, 2020, respectively.
Schedule of amounts recorded on the Balance Sheet related to cumulative basis adjustments for fair value hedges	The table below presents the carrying amount of Citi’s hedged assets and liabilities under qualifying fair value hedges at June 30, 2021 and December 31, 2020, along with the cumulative hedge basis adjustments included in the carrying value of those hedged assets and liabilities, that would reverse through earnings in future periods. In millions of dollars Balance sheet line item in which hedged item is recorded Carrying amount of hedged asset/ liability Cumulative fair value hedging adjustment increasing (decreasing) the carrying amount Active De-designated As of June 30, 2021 Debt securities AFS (1)(3) $ 78,108 $ 59 $ 126 Long-term debt 159,712 2,563 4,177 As of December 31, 2020 Debt securities AFS (2)(3) $ 81,082 $ 28 $ 342 Long-term debt 169,026 5,554 4,989 (1) These amounts include a cumulative basis adjustment of $111 million for active hedges and $(131) million for de-designated hedges as of June 30, 2021, related to certain prepayable financial assets previously designated as the hedged item in a fair value hedge using the last-of-layer approach. The Company designated approximately $7 billion as the hedged amount (from a closed portfolio of prepayable financial assets with a carrying value of $33 billion as of June 30, 2021) in a last-of-layer hedging relationship. (2) These amounts include a cumulative basis adjustment of $(18) million for active hedges and $62 million for de-designated hedges as of December 31, 2020, related to certain prepayable financial assets designated as the hedged item in a fair value hedge using the last-of-layer approach. The Company designated approximately $3 billion as the hedged amount (from a closed portfolio of prepayable financial assets with a carrying value of $19 billion as of December 31, 2020) in a last-of-layer hedging relationship. (3) Carrying amount represents the amortized cost.
Schedule of pretax change in accumulated other comprehensive income (loss) from cash flow hedges	The pretax change in AOCI from cash flow hedges is presented below. The after-tax impact of cash flow hedges on AOCI is shown in Note 17 to the Consolidated Financial Statements. Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Amount of gain (loss) recognized in AOCI on derivatives Interest rate contracts $ 39 $ 294 $ (416) $ 2,791 Foreign exchange contracts (3) (5) — (16) Total gain (loss) recognized in AOCI $ 36 $ 289 $ (416) $ 2,775 Other Net interest Other Other Net interest Other Net interest Amount of gain (loss) reclassified from AOCI to earnings (1) Interest rate contracts $ — $ 266 $ — $ 200 $ — $ 544 $ — $ 203 Foreign exchange contracts (1) — (1) — (2) — (2) — Total gain (loss) reclassified from AOCI into earnings $ (1) $ 266 $ (1) $ 200 $ (2) $ 544 $ (2) $ 203 Net pretax change in cash flow hedges included within AOCI $ (229) $ 90 $ (958) $ 2,574 (1) All amounts reclassified into earnings for interest rate contracts are included in Interest income/Interest expense (Net interest revenue) . For all other hedges, the amounts reclassified to earnings are included primarily in Other revenue and Net interest revenue in the Consolidated Statement of Income.
Schedule of key characteristics of credit derivative portfolio	The following tables summarize the key characteristics of Citi’s credit derivatives portfolio by counterparty and derivative form: Fair values Notionals In millions of dollars at June 30, 2021 Receivable (1) Payable (2) Protection Protection By industry of counterparty Banks $ 2,498 $ 3,167 $ 107,848 $ 103,288 Broker-dealers 1,817 1,124 45,629 41,188 Non-financial 119 79 6,089 2,774 Insurance and other financial 5,418 6,107 472,875 416,656 Total by industry of counterparty $ 9,852 $ 10,477 $ 632,441 $ 563,906 By instrument Credit default swaps and options $ 9,170 $ 9,784 $ 615,504 $ 556,760 Total return swaps and other 682 693 16,937 7,146 Total by instrument $ 9,852 $ 10,477 $ 632,441 $ 563,906 By rating of reference entity Investment grade $ 4,192 $ 4,036 $ 477,097 $ 421,549 Non-investment grade 5,660 6,441 155,344 142,357 Total by rating of reference entity $ 9,852 $ 10,477 $ 632,441 $ 563,906 By maturity Within 1 year $ 937 $ 1,479 $ 132,426 $ 123,092 From 1 to 5 years 6,157 6,323 441,620 396,219 After 5 years 2,758 2,675 58,395 44,595 Total by maturity $ 9,852 $ 10,477 $ 632,441 $ 563,906 (1) The fair value amount receivable is composed of $3,376 million under protection purchased and $6,476 million under protection sold. (2) The fair value amount payable is composed of $7,228 million under protection purchased and $3,249 million under protection sold. Fair values Notionals In millions of dollars at December 31, 2020 Receivable (1) Payable (2) Protection Protection By industry of counterparty Banks $ 2,902 $ 3,187 $ 117,685 $ 120,739 Broker-dealers 1,770 1,215 46,928 44,692 Non-financial 109 90 5,740 2,217 Insurance and other financial 5,008 5,637 442,417 375,959 Total by industry of counterparty $ 9,789 $ 10,129 $ 612,770 $ 543,607 By instrument Credit default swaps and options $ 9,254 $ 9,254 $ 599,633 $ 538,426 Total return swaps and other 535 875 13,137 5,181 Total by instrument $ 9,789 $ 10,129 $ 612,770 $ 543,607 By rating of reference entity Investment grade $ 4,136 $ 4,037 $ 478,643 $ 418,147 Non-investment grade 5,653 6,092 134,127 125,460 Total by rating of reference entity $ 9,789 $ 10,129 $ 612,770 $ 543,607 By maturity Within 1 year $ 914 $ 1,355 $ 134,080 $ 125,464 From 1 to 5 years 6,022 5,991 421,682 374,376 After 5 years 2,853 2,783 57,008 43,767 Total by maturity $ 9,789 $ 10,129 $ 612,770 $ 543,607 (1) The fair value amount receivable is composed of $3,514 million under protection purchased and $6,275 million under protection sold. (2) The fair value amount payable is composed of $7,037 million under protection purchased and $3,092 million under protection sold.

FAIR VALUE MEASUREMENT (Tables)

FAIR VALUE MEASUREMENT (Tables)	6 Months Ended
	Jun. 30, 2021
Fair Value Disclosures [Abstract]
Schedule of CVA and FVA applied to fair value of derivative instruments	The table below summarizes the credit valuation adjustments (CVA) and funding valuation adjustments (FVA) applied to the fair value of derivative instruments at June 30, 2021 and December 31, 2020: Credit and funding valuation adjustments In millions of dollars June 30, December 31, Counterparty CVA $ (617) $ (800) Asset FVA (434) (525) Citigroup (own credit) CVA 335 403 Liability FVA 78 67 Total CVA—derivative instruments $ (638) $ (855)
Schedule of pretax gains (losses) related to changes in CVA, FVA, and DVA	The table below summarizes pretax gains (losses) related to changes in CVA on derivative instruments, net of hedges, FVA on derivatives and debt valuation adjustments (DVA) on Citi’s own fair value option (FVO) liabilities for the periods indicated: Credit/funding/debt valuation Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Counterparty CVA $ 34 $ 45 $ 43 $ (238) Asset FVA 25 632 94 (421) Own credit CVA (41) (271) (78) 262 Liability FVA (13) (214) 11 123 Total CVA—derivative instruments $ 5 $ 192 $ 70 $ (274) DVA related to own FVO liabilities (1) $ (110) $ (2,935) $ (148) $ 1,253 Total CVA and DVA $ (105) $ (2,743) $ (78) $ 979
Items measured at fair value on a recurring basis	The following tables present for each of the fair value hierarchy levels the Company’s assets and liabilities that are measured at fair value on a recurring basis at June 30, 2021 and December 31, 2020. The Company may hedge positions that have been classified in the Level 3 category with other financial instruments (hedging instruments) that may be classified as Level 3, but also with financial instruments classified as Level 1 or Level 2. The effects of these hedges are presented gross in the following tables: Fair Value Levels In millions of dollars at June 30, 2021 Level 1 Level 2 Level 3 Gross Netting (1) Net Assets Securities borrowed and purchased under agreements to resell $ — $ 275,313 $ 211 $ 275,524 $ (87,648) $ 187,876 Trading non-derivative assets Trading mortgage-backed securities U.S. government-sponsored agency guaranteed — 31,998 376 32,374 — 32,374 Residential — 368 95 463 — 463 Commercial — 900 87 987 — 987 Total trading mortgage-backed securities $ — $ 33,266 $ 558 $ 33,824 $ — $ 33,824 U.S. Treasury and federal agency securities $ 60,491 $ 3,004 $ — $ 63,495 $ — $ 63,495 State and municipal — 1,540 70 1,610 — 1,610 Foreign government 60,726 30,205 141 91,072 — 91,072 Corporate 1,939 18,840 823 21,602 — 21,602 Equity securities 55,141 13,038 147 68,326 — 68,326 Asset-backed securities — 1,016 692 1,708 — 1,708 Other trading assets (2) 305 14,838 555 15,698 — 15,698 Total trading non-derivative assets $ 178,602 $ 115,747 $ 2,986 $ 297,335 $ — $ 297,335 Trading derivatives Interest rate contracts $ 61 $ 183,139 $ 2,777 $ 185,977 Foreign exchange contracts — 118,018 553 118,571 Equity contracts — 46,973 1,542 48,515 Commodity contracts — 24,306 891 25,197 Credit derivatives — 8,994 858 9,852 Total trading derivatives—before netting and collateral $ 61 $ 381,430 $ 6,621 $ 388,112 Cash collateral paid (3) $ 22,104 Netting agreements $ (293,047) Netting of cash collateral received (43,554) Total trading derivatives—after netting and collateral $ 61 $ 381,430 $ 6,621 $ 410,216 $ (336,601) $ 73,615 Investments Mortgage-backed securities U.S. government-sponsored agency guaranteed $ — $ 39,258 $ 52 $ 39,310 $ — $ 39,310 Residential — 404 — 404 — 404 Commercial — 43 — 43 — 43 Total investment mortgage-backed securities $ — $ 39,705 $ 52 $ 39,757 $ — $ 39,757 U.S. Treasury and federal agency securities $ 126,147 $ — $ — $ 126,147 $ — $ 126,147 State and municipal — 2,331 748 3,079 — 3,079 Foreign government 66,557 52,703 957 120,217 — 120,217 Corporate 4,358 3,441 104 7,903 — 7,903 Marketable equity securities 129 66 — 195 — 195 Asset-backed securities — 208 3 211 — 211 Other debt securities — 5,663 — 5,663 — 5,663 Non-marketable equity securities (4) — 69 382 451 — 451 Total investments $ 197,191 $ 104,186 $ 2,246 $ 303,623 $ — $ 303,623 Table continues on the next page. In millions of dollars at June 30, 2021 Level 1 Level 2 Level 3 Gross Netting (1) Net Loans $ — $ 7,278 $ 429 $ 7,707 $ — $ 7,707 Mortgage servicing rights — — 419 419 — 419 Non-trading derivatives and other financial assets measured on a recurring basis $ 3,457 $ 7,571 $ 55 $ 11,083 $ — $ 11,083 Total assets $ 379,311 $ 891,525 $ 12,967 $ 1,305,907 $ (424,249) $ 881,658 Total as a percentage of gross assets (5) 29.5% 69.4% 1.0% Liabilities Interest-bearing deposits $ — $ 2,595 $ 154 $ 2,749 $ — $ 2,749 Securities loaned and sold under agreements to repurchase — 157,088 488 157,576 (80,871) 76,705 Trading account liabilities Securities sold, not yet purchased 91,879 21,740 168 113,787 — 113,787 Other trading liabilities — 13 1 14 — 14 Total trading liabilities $ 91,879 $ 21,753 $ 169 $ 113,801 $ — $ 113,801 Trading derivatives Interest rate contracts $ 42 $ 167,686 $ 1,013 $ 168,741 Foreign exchange contracts 2 115,996 737 116,735 Equity contracts — 55,835 4,092 59,927 Commodity contracts — 27,437 749 28,186 Credit derivatives — 9,578 899 10,477 Total trading derivatives—before netting and collateral $ 44 $ 376,532 $ 7,490 $ 384,066 Cash collateral received (6) $ 17,965 Netting agreements $ (293,047) Netting of cash collateral paid (48,079) Total trading derivatives—after netting and collateral $ 44 $ 376,532 $ 7,490 $ 402,031 $ (341,126) $ 60,905 Short-term borrowings $ — $ 7,317 $ 41 $ 7,358 $ — $ 7,358 Long-term debt — 51,307 25,068 76,375 — 76,375 Total non-trading derivatives and other financial liabilities measured on a recurring basis $ 3,152 $ 123 $ 4 $ 3,279 $ 3,279 Total liabilities $ 95,075 $ 616,715 $ 33,414 $ 763,169 $ (421,997) $ 341,172 Total as a percentage of gross liabilities (5) 12.8 % 82.8 % 4.5 % (1) Represents netting of (i) the amounts due under securities purchased under agreements to resell and the amounts owed under securities sold under agreements to repurchase and (ii) derivative exposures covered by a qualifying master netting agreement and cash collateral offsetting. (2) Includes positions related to investments in unallocated precious metals, as discussed in Note 21 to the Consolidated Financial Statements. Also includes physical commodities accounted for at the lower of cost or fair value and unfunded credit products. (3) Reflects the net amount of $70,183 million of gross cash collateral paid, of which $48,079 million was used to offset trading derivative liabilities. (4) Amounts exclude $0.1 billion of investments measured at net asset value (NAV) in accordance with ASU 2015-07, Fair Value Measurement (Topic 820): Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent). (5) Because the amount of the cash collateral paid/received has not been allocated to the Level 1, 2 and 3 subtotals, these percentages are calculated based on total assets and liabilities measured at fair value on a recurring basis, excluding the cash collateral paid/received on derivatives. (6) Reflects the net amount of $61,519 million of gross cash collateral received, of which $43,554 million was used to offset trading derivative assets. Fair Value Levels In millions of dollars at December 31, 2020 Level 1 Level 2 Level 3 Gross Netting (1) Net Assets Securities borrowed and purchased under agreements to resell $ — $ 335,073 $ 320 $ 335,393 $ (150,189) $ 185,204 Trading non-derivative assets Trading mortgage-backed securities U.S. government-sponsored agency guaranteed — 42,903 27 42,930 — 42,930 Residential — 391 340 731 — 731 Commercial — 893 136 1,029 — 1,029 Total trading mortgage-backed securities $ — $ 44,187 $ 503 $ 44,690 $ — $ 44,690 U.S. Treasury and federal agency securities $ 64,529 $ 2,269 $ — $ 66,798 $ — $ 66,798 State and municipal — 1,224 94 1,318 — 1,318 Foreign government 68,195 15,143 51 83,389 — 83,389 Corporate 1,607 18,840 375 20,822 — 20,822 Equity securities 54,117 12,289 73 66,479 — 66,479 Asset-backed securities — 776 1,606 2,382 — 2,382 Other trading assets (2) — 11,295 945 12,240 — 12,240 Total trading non-derivative assets $ 188,448 $ 106,023 $ 3,647 $ 298,118 $ — $ 298,118 Trading derivatives Interest rate contracts $ 42 $ 238,026 $ 3,393 $ 241,461 Foreign exchange contracts 2 155,994 674 156,670 Equity contracts 66 48,362 2,091 50,519 Commodity contracts — 13,546 992 14,538 Credit derivatives — 8,634 1,155 9,789 Total trading derivatives—before netting and collateral $ 110 $ 464,562 $ 8,305 $ 472,977 Cash collateral paid (3) $ 32,778 Netting agreements $ (364,879) Netting of cash collateral received (63,915) Total trading derivatives—after netting and collateral $ 110 $ 464,562 $ 8,305 $ 505,755 $ (428,794) $ 76,961 Investments Mortgage-backed securities U.S. government-sponsored agency guaranteed $ — $ 43,888 $ 30 $ 43,918 $ — $ 43,918 Residential — 571 — 571 — 571 Commercial — 50 — 50 — 50 Total investment mortgage-backed securities $ — $ 44,509 $ 30 $ 44,539 $ — $ 44,539 U.S. Treasury and federal agency securities $ 146,032 $ 172 $ — $ 146,204 $ — $ 146,204 State and municipal — 2,885 834 3,719 — 3,719 Foreign government 77,056 47,644 268 124,968 — 124,968 Corporate 6,326 4,114 60 10,500 — 10,500 Marketable equity securities 287 228 — 515 — 515 Asset-backed securities — 277 1 278 — 278 Other debt securities — 4,876 — 4,876 — 4,876 Non-marketable equity securities (4) — 50 349 399 — 399 Total investments $ 229,701 $ 104,755 $ 1,542 $ 335,998 $ — $ 335,998 Table continues on the next page. In millions of dollars at December 31, 2020 Level 1 Level 2 Level 3 Gross Netting (2) Net Loans $ — $ 4,869 $ 1,985 $ 6,854 $ — $ 6,854 Mortgage servicing rights — — 336 336 — 336 Non-trading derivatives and other financial assets measured on a recurring basis $ 6,230 $ 8,383 $ — $ 14,613 $ — $ 14,613 Total assets $ 424,489 $ 1,023,665 $ 16,135 $ 1,497,067 $ (578,983) $ 918,084 Total as a percentage of gross assets (5) 29.0% 69.9% 1.1% Liabilities Interest-bearing deposits $ — $ 1,752 $ 206 $ 1,958 $ — $ 1,958 Securities loaned and sold under agreements to repurchase — 156,644 631 157,275 (97,069) 60,206 Trading account liabilities Securities sold, not yet purchased 85,353 14,477 214 100,044 — 100,044 Other trading liabilities — — 26 26 — 26 Total trading liabilities $ 85,353 $ 14,477 $ 240 $ 100,070 $ — $ 100,070 Trading account derivatives Interest rate contracts $ 25 $ 220,607 $ 1,779 $ 222,411 Foreign exchange contracts 3 155,441 622 156,066 Equity contracts 53 58,212 5,304 63,569 Commodity contracts — 17,393 700 18,093 Credit derivatives — 9,022 1,107 10,129 Total trading derivatives—before netting and collateral $ 81 $ 460,675 $ 9,512 $ 470,268 Cash collateral received (6) $ 8,196 Netting agreements $ (364,879) Netting of cash collateral paid (45,628) Total trading derivatives—after netting and collateral $ 81 $ 460,675 $ 9,512 $ 478,464 $ (410,507) $ 67,957 Short-term borrowings $ — $ 4,464 $ 219 $ 4,683 $ — $ 4,683 Long-term debt — 41,853 25,210 67,063 — 67,063 Non-trading derivatives and other financial liabilities measured on a recurring basis $ 6,762 $ 72 $ 1 $ 6,835 $ — $ 6,835 Total liabilities $ 92,196 $ 679,937 $ 36,019 $ 816,348 $ (507,576) $ 308,772 Total as a percentage of gross liabilities (5) 11.4 % 84.1 % 4.5 % (1) Represents netting of (i) the amounts due under securities purchased under agreements to resell and the amounts owed under securities sold under agreements to repurchase and (ii) derivative exposures covered by a qualifying master netting agreement and cash collateral offsetting. (2) Includes positions related to investments in unallocated precious metals, as discussed in Note 21 to the Consolidated Financial Statements. Also includes physical commodities accounted for at the lower of cost or fair value and unfunded credit products. (3) Reflects the net amount of $78,406 million of gross cash collateral paid, of which $45,628 million was used to offset trading derivative liabilities. (4) Amounts exclude $0.2 billion of investments measured at NAV in accordance with ASU 2015-07, Fair Value Measurement (Topic 820): Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent). (5) Because the amount of the cash collateral paid/received has not been allocated to the Level 1, 2 and 3 subtotals, these percentages are calculated based on total assets and liabilities measured at fair value on a recurring basis, excluding the cash collateral paid/received on derivatives. (6) Reflects the net amount of $72,111 million of gross cash collateral received, of which $63,915 million was used to offset trading derivative assets.
Changes in level 3 fair value category	The hedged items and related hedges are presented gross in the following tables: Level 3 Fair Value Rollforward Net realized/unrealized gains (losses) incl. in (1) Transfers Unrealized (3) In millions of dollars Mar. 31, 2021 Principal Other (1)(2) into out of Purchases Issuances Sales Settlements Jun. 30, 2021 Assets Securities borrowed and purchased under agreements to resell $ 262 $ (2) $ — $ — $ (49) $ 43 $ — $ — $ (43) $ 211 $ 1 Trading non-derivative assets Trading mortgage-backed securities U.S. government-sponsored agency guaranteed 38 2 — 238 (7) 113 — (8) — 376 (12) Residential 268 (1) — 41 (65) 57 — (205) — 95 2 Commercial 59 16 — 60 (8) 11 — (51) — 87 3 Total trading mortgage-backed securities $ 365 $ 17 $ — $ 339 $ (80) $ 181 $ — $ (264) $ — $ 558 $ (7) U.S. Treasury and federal agency securities $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — State and municipal 94 — — — (29) 5 — — — 70 — Foreign government 81 4 — 125 (28) 14 — (55) — 141 1 Corporate 290 (15) — 312 (50) 408 — (122) — 823 (36) Marketable equity securities 89 2 — 80 (40) 23 — (7) — 147 15 Asset-backed securities 1,208 209 — 17 (148) 352 — (946) — 692 22 Other trading assets 571 62 — 31 (121) 201 — (189) — 555 4 Total trading non-derivative assets $ 2,698 $ 279 $ — $ 904 $ (496) $ 1,184 $ — $ (1,583) $ — $ 2,986 $ (1) Trading derivatives, net (4) Interest rate contracts $ 1,229 $ (126) $ — $ 218 $ 321 $ 2 $ — $ — $ 120 $ 1,764 $ (70) Foreign exchange contracts (86) 59 — — 4 111 — (282) 10 (184) (28) Equity contracts (2,876) 309 — (634) 892 85 — (94) (232) (2,550) 349 Commodity contracts 732 236 — (148) (612) 28 — (45) (49) 142 (194) Credit derivatives 71 (57) — (52) (74) — — — 71 (41) (107) Total trading derivatives, net (4) $ (930) $ 421 $ — $ (616) $ 531 $ 226 $ — $ (421) $ (80) $ (869) $ (50) Table continues on the next page. Net realized/unrealized gains (losses) incl. in (1) Transfers Unrealized (3) In millions of dollars Mar. 31, 2021 Principal Other (1)(2) into out of Purchases Issuances Sales Settlements Jun. 30, 2021 Investments Mortgage-backed securities U.S. government-sponsored agency guaranteed $ 30 $ — $ 2 $ 22 $ — $ 3 $ — $ (5) $ — $ 52 $ (21) Total investment mortgage-backed securities $ 30 $ — $ 2 $ 22 $ — $ 3 $ — $ (5) $ — $ 52 $ (21) U.S. Treasury and federal agency securities $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — State and municipal 794 — 8 54 (108) 2 — (2) — 748 6 Foreign government 523 — 3 440 (289) 315 — (35) — 957 3 Corporate 56 — (7) 32 — 30 — (7) — 104 (1) Asset-backed securities 4 — (21) 33 — — — (13) — 3 1 Non-marketable equity securities 352 — 30 — — — — — — 382 2 Total investments $ 1,759 $ — $ 15 $ 581 $ (397) $ 350 $ — $ (62) $ — $ 2,246 $ (10) Loans $ 1,944 $ — $ 476 $ 60 $ (2,051) $ — $ — $ — $ — $ 429 $ 169 Mortgage servicing rights 433 — (21) — — — 25 — (18) 419 (21) Other financial assets measured on a recurring basis — — — 55 — — — — — 55 — Liabilities Interest-bearing deposits $ 199 $ — $ 2 $ — $ (44) $ — $ 11 $ — $ (10) $ 154 $ — Securities loaned and sold under agreements to repurchase 977 22 — — (483) 80 — — (64) 488 — Trading account liabilities Securities sold, not yet purchased 167 7 — 54 (21) 10 — — (35) 168 26 Other trading liabilities 6 5 — — — — — — — 1 4 Short-term borrowings 49 33 — 40 (32) — 17 — — 41 17 Long-term debt 26,337 (849) — 3,937 (5,966) — 1,825 — (1,914) 25,068 (699) Other financial liabilities measured on a recurring basis 8 — — — (4) — — — 4 — (1) Net realized/unrealized gains (losses) are presented as increase (decrease) to Level 3 assets, and as (increase) decrease to Level 3 liabilities. Changes in fair value of available-for-sale debt securities are recorded in AOCI , unless related to credit impairment, while gains and losses from sales are recorded in Realized gains (losses) from sales of investments in the Consolidated Statement of Income. (2) Unrealized gains (losses) on MSRs are recorded in Other revenue in the Consolidated Statement of Income. (3) Represents the amount of total gains or losses for the period, included in earnings (and AOCI for changes in fair value of available-for-sale debt securities and DVA on fair value option liabilities), attributable to the change in fair value relating to assets and liabilities classified as Level 3 that are still held at June 30, 2021. (4) Total Level 3 trading derivative assets and liabilities have been netted in these tables for presentation purposes only. Net realized/unrealized gains (losses) incl. in (1) Transfers Unrealized (3) In millions of dollars Dec. 31, 2020 Principal Other (1)(2) into out of Purchases Issuances Sales Settlements Jun. 30, 2021 Assets Securities borrowed and purchased under agreements to resell $ 320 $ (11) $ — $ — $ (49) $ 276 $ — $ — $ (325) $ 211 $ 1 Trading non-derivative assets Trading mortgage-backed securities U.S. government-sponsored agency guaranteed 27 1 — 252 (8) 114 — (10) — 376 16 Residential 340 22 — 69 (68) 201 — (469) — 95 18 Commercial 136 21 — 76 (41) 24 — (129) — 87 2 Total trading mortgage-backed securities $ 503 $ 44 $ — $ 397 $ (117) $ 339 $ — $ (608) $ — $ 558 $ 36 U.S. Treasury and federal agency securities $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — State and municipal 94 — — — (29) 5 — — — 70 1 Foreign government 51 5 — 136 (28) 71 — (94) — 141 (6) Corporate 375 75 — 318 (168) 475 — (252) — 823 (7) Marketable equity securities 73 47 — 84 (42) 35 — (50) — 147 32 Asset-backed securities 1,606 248 — 35 (198) 934 — (1,933) — 692 8 Other trading assets 945 18 — 61 (129) 348 4 (688) (4) 555 (5) Total trading non-derivative assets $ 3,647 $ 437 $ — $ 1,031 $ (711) $ 2,207 $ 4 $ (3,625) $ (4) $ 2,986 $ 59 Trading derivatives, net (4) Interest rate contracts $ 1,614 $ (298) $ — $ 173 $ 321 $ 2 $ (84) $ — $ 36 $ 1,764 $ (197) Foreign exchange contracts 52 (79) — 8 4 134 — (297) (6) (184) (57) Equity contracts (3,213) 612 — (598) 898 109 — (117) (241) (2,550) 213 Commodity contracts 292 550 — 10 (617) 94 — (155) (32) 142 280 Credit derivatives 48 (121) — 15 (71) — — — 88 (41) (198) Total trading derivatives, net (4) $ (1,207) $ 664 $ — $ (392) $ 535 $ 339 $ (84) $ (569) $ (155) $ (869) $ 41 Investments Mortgage-backed securities U.S. government-sponsored agency guaranteed $ 30 $ — $ 2 $ 22 $ — $ 3 $ — $ (5) $ — $ 52 $ (42) Total investment mortgage-backed securities $ 30 $ — $ 2 $ 22 $ — $ 3 $ — $ (5) $ — $ 52 $ (42) U.S. Treasury and federal agency securities $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — State and municipal 834 — (10) 58 (108) 3 — (29) — 748 (8) Foreign government 268 — 1 440 (289) 645 — (108) — 957 3 Corporate 60 — (11) 32 — 30 — (7) — 104 (1) Asset-backed securities 1 — (21) 36 — — — (13) — 3 (37) Non-marketable equity securities 349 — 40 1 — — — (8) — 382 2 Total investments $ 1,542 $ — $ 1 $ 589 $ (397) $ 681 $ — $ (170) $ — $ 2,246 $ (83) Net realized/unrealized gains (losses) incl. in (1) Transfers Unrealized (3) In millions of dollars Dec. 31 2020 Principal Other (1)(2) into out of Purchases Issuances Sales Settlements Jun. 30, 2021 Loans $ 1,985 $ — $ 348 $ 271 $ (2,051) $ — $ 1 $ — $ (125) $ 429 $ 100 Mortgage servicing rights 336 — 52 — — — 68 — (37) 419 59 Other financial assets measured on a recurring basis — — — 55 — — — — — 55 — Liabilities Interest-bearing deposits $ 206 $ — $ 18 $ — $ (44) $ — $ 20 $ — $ (10) $ 154 $ (45) Securities loaned and sold under agreements to repurchase 631 7 — — (483) 488 — — (141) $ 488 19 Trading account liabilities Securities sold, not yet purchased 214 61 — 62 (25) 20 — — (42) $ 168 (2) Other trading liabilities 26 25 — — — — — — — $ 1 — Short-term borrowings 219 32 — 42 (44) — 25 — (169) $ 41 17 Long-term debt 25,210 1,773 — 4,869 (5,968) — 7,545 — (4,815) $ 25,068 791 Other financial liabilities measured on a recurring basis 1 — (3) — (4) — 14 — (10) $ 4 — (1) Net realized/unrealized gains (losses) are presented as increase (decrease) to Level 3 assets, and as (increase) decrease to Level 3 liabilities. Changes in fair value of available-for-sale debt securities are recorded in AOCI , unless related to other-than-temporary impairment, while gains and losses from sales are recorded in Realized gains (losses) from sales of investments in the Consolidated Statement of Income. (2) Unrealized gains (losses) on MSRs are recorded in Other revenue in the Consolidated Statement of Income. (3) Represents the amount of total gains or losses for the period, included in earnings (and AOCI for changes in fair value of available-for-sale debt securities and DVA on fair value option liabilities), attributable to the change in fair value relating to assets and liabilities classified as Level 3 that are still held at June 30, 2021. (4) Total Level 3 trading derivative assets and liabilities have been netted in these tables for presentation purposes only. Net realized/unrealized gains (losses) incl. in (1) Transfers Unrealized (3) In millions of dollars Mar. 31, 2020 Principal Other (1)(2) into out of Purchases Issuances Sales Settlements Jun. 30, 2020 Assets Securities borrowed or purchased under agreements to resell $ 300 $ 34 $ — $ — $ — $ 42 $ — $ — $ (50) $ 326 $ 36 Trading non-derivative assets Trading mortgage-backed securities U.S. government-sponsored agency guaranteed 85 1 — 4 (6) 67 — (55) — 96 4 Residential 304 14 — 144 (39) 96 — (86) — 433 7 Commercial 44 4 — 140 (14) 62 — (19) — 217 11 Total trading mortgage-backed securities $ 433 $ 19 $ — $ 288 $ (59) $ 225 $ — $ (160) $ — $ 746 $ 22 U.S. Treasury and federal agency securities $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — State and municipal 92 — — 5 (1) 41 — (20) — 117 — Foreign government 39 57 — 2 (2) 18 — (88) — 26 54 Corporate 412 (12) — 64 (78) 204 — (185) (6) 399 (71) Equity securities 143 9 — 10 — 174 — (244) — 92 (3) Asset-backed securities 1,561 67 — 257 (56) 272 — (316) — 1,785 46 Other trading assets 639 27 — 153 (15) 126 6 (134) (5) 797 1 Total trading non-derivative assets $ 3,319 $ 167 $ — $ 779 $ (211) $ 1,060 $ 6 $ (1,147) $ (11) $ 3,962 $ 49 Trading derivatives, net (4) Interest rate contracts $ 1,755 $ 24 $ — $ 231 $ 20 $ 1 $ — $ — $ (63) $ 1,968 $ 7 Foreign exchange contracts 2 (37) — (8) 2 5 — (5) 15 (26) (47) Equity contracts (1,836) (354) — (104) 12 21 — (5) 31 (2,235) (349) Commodity contracts (542) 253 — (1) (14) 20 — (10) 16 (278) 241 Credit derivatives 816 (367) — 17 (72) — — — 8 402 (367) Total trading derivatives, net (4) $ 195 $ (481) $ — $ 135 $ (52) $ 47 $ — $ (20) $ 7 $ (169) $ (515) Investments Mortgage-backed securities U.S. government-sponsored agency guaranteed $ 47 $ — $ (19) $ 1 $ — $ 1 $ — $ — $ — $ 30 $ (36) Residential — — — — — — — — — — — Commercial — — — — — — — — — — — Total investment mortgage-backed securities $ 47 $ — $ (19) $ 1 $ — $ 1 $ — $ — $ — $ 30 $ (36) U.S. Treasury and federal agency securities $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — State and municipal 687 — 24 172 (131) 95 — (22) — 825 21 Foreign government 225 — 7 — (64) 61 — (33) — 196 6 Corporate 238 — 10 — (152) 10 — — — 106 — Equity securities — — — 1 — — — — — 1 — Asset-backed securities 16 — (2) — — — — (8) — 6 — Other debt securities — — — — — — — — — — — Non-marketable equity securities 354 — 21 — — 2 — — (45) 332 25 Total investments $ 1,567 $ — $ 41 $ 174 $ (347) $ 169 $ — $ (63) $ (45) $ 1,496 $ 16 Table continues on the next page. Net realized/unrealized gains (losses) incl. in (1) Transfers Unrealized (3) In millions of dollars Mar. 31, 2020 Principal Other (1)(2) into out of Purchases Issuances Sales Settlements Jun. 30, 2020 Loans $ 537 $ — $ 447 $ — $ (5) $ — $ — $ — $ (1) $ 978 $ 355 Mortgage servicing rights 367 — (26) — — — 24 — (20) 345 (14) Other financial assets measured on a recurring basis — — 14 — — — (6) (4) (4) — 2 Liabilities Interest-bearing deposits $ 491 $ — $ (5) $ — $ (151) $ — $ 30 $ — $ (138) $ 237 $ (27) Securities loaned or sold under agreements to repurchase 730 — — — — — — — (105) 625 — Trading account liabilities Securities sold, not yet purchased 200 (28) — 43 (8) — — — (159) 104 24 Other trading liabilities — — — — — — — — — — — Short-term borrowings 52 9 — 75 (6) — 23 — (7) 128 16 Long-term debt 19,269 (1,691) — 1,875 (1,475) — 2,527 — (2,254) 21,633 (1,518) Other financial liabilities measured on a recurring basis — — — — — — — — — — — (1) Net realized/unrealized gains (losses) are presented as increase (decrease) to Level 3 assets, and as (increase) decrease to Level 3 liabilities. Changes in fair value of available-for-sale investments are recorded in AOCI , unless related to credit impairment, while gains and losses from sales are recorded in Realized gains (losses) from sales of investments in the Consolidated Statement of Income. (2) Unrealized gains (losses) on MSRs are recorded in Other revenue in the Consolidated Statement of Income. (3) Represents the amount of total gains or losses for the period, included in earnings (and AOCI for changes in fair value of available-for-sale debt securities and DVA on fair value option liabilities), attributable to the change in fair value relating to assets and liabilities classified as Level 3 that are still held at June 30, 2020. (4) Total Level 3 derivative assets and liabilities have been netted in these tables for presentation purposes only. Net realized/unrealized gains (losses) incl. in (1) Transfers Unrealized (3) In millions of dollars Dec. 31, 2019 Principal Other (1)(2) into out of Purchases Issuances Sales Settlements Jun. 30, 2020 Assets Securities borrowed and purchased under agreements to resell $ 303 $ 14 $ — $ — $ — $ 108 $ — $ — $ (99) $ 326 $ 39 Trading non-derivative assets Trading mortgage-backed securities U.S. government-sponsored agency guaranteed 10 (74) — 16 (9) 208 — (55) — 96 5 Residential 123 6 — 204 (43) 274 — (131) — 433 — Commercial 61 4 — 143 (17) 89 — (63) — 217 (10) Total trading mortgage-backed securities $ 194 $ (64) $ — $ 363 $ (69) $ 571 $ — $ (249) $ — $ 746 $ (5) U.S. Treasury and federal agency securities $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — State and municipal 64 2 — 15 (3) 62 — (23) — 117 1 Foreign government 52 (28) — 2 (2) 104 — (102) — 26 52 Corporate 313 290 — 86 (70) 419 — (633) (6) 399 (87) Marketable equity securities 100 9 — 38 (3) 206 — (258) — 92 (19) Asset-backed securities 1,117 (102) — 496 (60) 740 — (466) — 1,785 (222) Other trading assets 555 220 — 181 (152) 231 14 (237) (15) 797 (23) Total trading non-derivative assets $ 2,455 $ 327 $ — $ 1,181 $ (359) $ 2,333 $ 14 $ (1,968) $ (21) $ 3,962 $ (303) Trading derivatives, net (4) Interest rate contracts $ 1 $ 375 $ — $ 1,614 $ (2) $ 2 $ 56 $ 13 $ (91) $ 1,968 $ 387 Foreign exchange contracts (5) (52) — (33) 11 49 — (13) 17 (26) 104 Equity contracts (1,596) (564) — (391) 236 24 — (6) 62 (2,235) (663) Commodity contracts (59) (206) — 37 (70) 66 — (44) (2) (278) (211) Credit derivatives (56) 579 — 171 (358) — — — 66 402 372 Total trading derivatives, net (4) $ (1,715) $ 132 $ — $ 1,398 $ (183) $ 141 $ 56 $ (50) $ 52 $ (169) $ (11) Investments Mortgage-backed securities U.S. government-sponsored agency guaranteed $ 32 $ — $ (5) $ 1 $ 1 $ 1 $ — $ — $ — $ 30 $ (23) Residential — — — — — — — — — — — Commercial — — — — — — — — — — — Total investment mortgage-backed securities $ 32 $ — $ (5) $ 1 $ 1 $ 1 $ — $ — $ — $ 30 $ (23) U.S. Treasury and federal agency securities $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — State and municipal 623 — (7) 310 (131) 95 — (65) — 825 25 Foreign government 96 — 5 27 (64) 208 — (76) — 196 (9) Corporate 45 — 2 49 (152) 162 — — — 106 — Marketable equity securities — — — 1 — — — — — 1 — Asset-backed securities 22 — 3 — — — — (19) — 6 34 Other debt securities — — — — — — — — — — — Non-marketable equity securities 441 — (53) — — 2 — (3) (55) 332 22 Total investments $ 1,259 $ — $ (55) $ 388 $ (346) $ 468 $ — $ (163) $ (55) $ 1,496 $ 49 Table continues on the next page. Net realized/unrealized gains (losses) incl. in (1) Transfers Unrealized (3) In millions of dollars Dec. 31, 2019 Principal Other (1)(2) into out of Purchases Issuances Sales Settlements Jun. 30, 2020 Loans $ 402 $ — $ 368 $ 217 $ (6) $ — $ — $ — $ (3) $ 978 $ 509 Mortgage servicing rights 495 — (169) — — — 56 — (37) 345 (147) Other financial assets measured on a recurring basis 1 — 14 — — — (6) (5) (4) — 16 Liabilities Interest-bearing deposits $ 215 $ — $ (11) $ 278 $ (151) $ — $ 30 $ — $ (146) $ 237 $ (6) Securities loaned and sold under agreements to repurchase 757 27 — — — — — — (105) 625 (33) Trading account liabilities Securities sold, not yet purchased 48 (129) — 117 (18) — 9 — (181) 104 (7) Other trading liabilities — — — — — — — — — — — Short-term borrowings 13 19 — 86 (6) — 61 — (7) 128 21 Long-term debt 17,169 (380) — 5,063 (4,168) — 6,788 — (3,600) 21,633 (746) Other financial liabilities measured on a recurring basis — — — — — — 2 — (2) — — (1) Net realized/unrealized gains (losses) are presented as increase (decrease) to Level 3 assets, and as (increase) decrease to Level 3 liabilities. Changes in fair value of available-for-sale debt securities are recorded in AOCI , unless related to credit impairment, while gains and losses from sales are recorded in Realized gains (losses) from sales of investments in the Consolidated Statement of Income. (2) Unrealized gains (losses) on MSRs are recorded in Other revenue in the Consolidated Statement of Income. (3) Represents the amount of total gains or losses for the period, included in earnings (and AOCI for changes in fair value of available-for-sale debt securities and DVA on fair value option liabilities), attributable to the change in fair value relating to assets and liabilities classified as Level 3 that are still held at June 30, 2020. (4) Total Level 3 trading derivative assets and liabilities have been netted in these tables for presentation purposes only.
Significant valuation techniques and most significant unobservable inputs used in Level 3 fair value measurements	The following tables present the valuation techniques covering the majority of Level 3 inventory and the most significant unobservable inputs used in Level 3 fair value measurements. Differences between this table and amounts presented in the Level 3 Fair Value Rollforward table represent individually immaterial items that have been measured using a variety of valuation techniques other than those listed. As of June 30, 2021 Fair value (1) (in millions) Methodology Input Low (2)(3) High (2)(3) Weighted average (4) Assets Securities borrowed and purchased under agreements to resell $ 211 Model-based Credit spread 15 bps 15 bps 15 bps Interest rate 0.30 % 0.30 % 0.30 % Mortgage-backed securities $ 452 Yield analysis Yield 1.64 % 17.78 % 7.31 % 136 Price-based Price $ 4.00 $ 120.68 $ 91.67 State and municipal, foreign government, corporate and other debt securities $ 2,069 Price-based Price $ 5.24 $ 1,027.67 $ 213.01 973 Model-based Credit spread 35 bps 583 bps 246 bps Marketable equity securities (5) $ 139 Price-based Price $ — $ 97,500.00 $ 25,976.84 Illiquidity discount 24.70 % 25.00 % 24.87 % Asset-backed securities $ 418 Price-based Price $ 2.08 $ 166.03 $ 68.96 211 Yield analysis Yield 2.29 % 15.40 % 6.35 % Non-marketable equities $ 248 Comparables analysis Illiquidity discount 10.00 % 35.00 % 21.53 % 97 Price-based PE ratio 12.00x 31.00x 18.52x Adjustment factor 0.18x 0.80x 0.47x Price $ 11.03 $ 1,610.00 $ 1,269.53 EBITDA multiples 5.70x 19.40x 13.18x Revenue multiple 10.20x 15.30x 13.58x Derivatives—gross (6) Interest rate contracts (gross) $ 3,740 Model-based IR Normal volatility 0.10 % 0.75 % 0.55 % Inflation volatility 0.28 % 2.58 % 1.47 % Foreign exchange contracts (gross) $ 1,240 Model-based IR Normal volatility 0.11 % 0.58 % 0.51 % IR basis (0.70) % 1.07 % 0.10 % FX volatility 5.00 % 28.55 % 9.94 % Equity contracts (gross) (7) $ 5,608 Model-based Equity volatility — % 299.00 % 50.26 % Equity forward 57.00 % 125.00 % 89.82 % Commodity and other contracts (gross) $ 1,640 Model-based Commodity correlation (49.00) % 92.00 % 18.34 % Commodity volatility 10.00 % 69.00 % 24.91 % Forward price 9.99 % 421.06 % 110.04 % Credit derivatives (gross) $ 1,283 Model-based Credit spread 4 bps 600 bps 52 bps 466 Price-based Recovery rate 25.00 % 75.00 % 46.24 % Upfront points 5.05 % 100.00 % 58.73 % Price $ 15.06 $ 103.63 $ 72.48 Nontrading derivatives and other financial assets and liabilities measured on a recurring basis (gross) $ 17 Price-based Price $ 4.96 $ 44.50 $ 39.76 Loans and leases $ 335 Model-based Equity volatility 22.06 % 63.96 % 30.76 % 87 Price-based Price $ 35.23 $ 409.11 $ 111.37 Mortgage servicing rights $ 339 Cash flow Yield 2.00 % 15.00 % 6.74 % As of June 30, 2021 Fair value (1) (in millions) Methodology Input Low (2)(3) High (2)(3) Weighted average (4) 80 Model-based WAL 3.15 years 6.32 years 5.49 years Liabilities Interest-bearing deposits $ 154 Model-based IR Normal volatility 0.13 % 0.75 % 0.61 % Securities loaned and sold under agreements to repurchase $ 488 Model-based Interest rate 0.06 % 2.04 % 1.25 % Trading account liabilities Securities sold, not yet purchased and other trading liabilities $ 116 Model-based IR Lognormal volatility 55.87 % 139.01 % 106.26 % 52 Price-based Price $ — $ 12,351.44 $ 2,184.24 Interest rate 0.17 % 0.23 % 0.20 % Short-term borrowings and long-term debt $ 24,881 Model-based IR Normal volatility 0.11 % 0.75 % 0.55 % Equity volatility 0.07 % 299.00 % 64.51 % Equity forward 57.00 % 125.00 % 89.78 % Equity-FX correlation (81.00) % 80.00 % (12.54) % FX volatility — % 37.00 % 10.12 % As of December 31, 2020 Fair value (1) (in millions) Methodology Input Low (2)(3) High (2)(3) Weighted average (4) Assets Securities borrowed and purchased under agreements to resell $ 320 Model-based Credit spread 15 bps 15 bps 15 bps Interest rate 0.30 % 0.35 % 0.32 % Mortgage-backed securities $ 344 Price-based Price $ 30 $ 111 $ 80 168 Yield analysis Yield 2.63 % 21.80 % 10.13 % State and municipal, foreign government, corporate and other debt securities $ 1,566 Price-based Price $ — $ 2,265 $ 90 852 Model-based Credit spread 35 bps 375 bps 226 bps Marketable equity securities (5) $ 36 Model-based Price $ — $ 31,000 $ 5,132 36 Price-based WAL 1.48 years 1.48 years 1.48 years Recovery (in millions) $ 5,733 $ 5,733 $ 5,733 Asset-backed securities $ 863 Price-based Price $ 2 $ 157 $ 59 744 Yield analysis Yield 3.77 % 21.77 % 9.01 % Non-marketable equities $ 205 Comparables analysis Illiquidity discount 10.00 % 45.00 % 25.29 % PE ratio 13.60x 28.00x 22.83x 142 Price-based Price $ 136 $ 2,041 $ 1,647 EBITDA multiples 3.30x 36.70x 15.10x Adjustment factor 0.20x 0.61x 0.25x Appraised value (in thousands) $ 287 $ 39,745 $ 21,754 Revenue multiple 2.70x 28.00x 8.92x Derivatives—gross (6) Interest rate contracts (gross) $ 5,143 Model-based Inflation volatility 0.27 % 2.36 % 0.78 % IR normal volatility 0.11 % 0.73 % 0.52 % Foreign exchange contracts (gross) $ 1,296 Model-based FX volatility 1.70 % 12.63 % 5.41 % Contingent event 100.00 % 100.00 % 100.00 % Interest rate 0.84 % 84.09 % 17.55 % IR normal volatility 0.11 % 0.52 % 0.46 % IR-FX correlation 40.00 % 60.00 % 50.00 % As of December 31, 2020 Fair value (1) (in millions) Methodology Input Low (2)(3) High (2)(3) Weighted average (4) IR-IR correlation (21.71) % 40.00 % 38.09 % Equity contracts (gross) (7) $ 7,330 Model-based Equity volatility 5.00 % 91.43 % 42.74 % Forward price 65.88 % 105.20 % 91.82 % Commodity and other contracts (gross) $ 1,636 Model-based Commodity correlation (44.92) % 95.91 % 70.60 % Commodity volatility 0.16 % 80.17 % 23.72 % Forward price 15.40 % 262.00 % 98.53 % Credit derivatives (gross) $ 1,854 Model-based Credit spread 3.50 bps 352.35 bps 99.89 bps 408 Price-based Recovery rate 20.00 % 60.00 % 41.60 % Credit correlation 25.00 % 80.00 % 43.36 % Upfront points — % 107.20 % 48.10 % Loans and leases $ 1,804 Model-based Equity volatility 24.65 % 83.09 % 58.23 % Mortgage servicing rights $ 258 Cash flow Yield 2.86 % 16.00 % 6.32 % 78 Model-based WAL 2.66 years 5.40 years 4.46 years Liabilities Interest-bearing deposits $ 206 Model-based IR Normal volatility 0.11 % 0.73 % 0.54 % Securities loaned and sold under agreements to repurchase $ 631 Model-based Interest rate 0.08 % 1.86 % 0.71 % Trading account liabilities Securities sold, not yet purchased $ 178 Model-based IR lognormal volatility 52.06 % 128.87 % 89.82 % 62 Price-based Price $ — $ 866 $ 80 Interest rate 10.03 % 20.07 % 13.70 % Short-term borrowings and $ 24,827 Model-based IR Normal volatility 0.11 % 0.73 % 0.51 % Forward price 15.40 % 262.00 % 92.48 % (1) The tables above include the fair values for the items listed and may not foot to the total population for each category. (2) Some inputs are shown as zero due to rounding. (3) When the low and high inputs are the same, there is either a constant input applied to all positions, or the methodology involving the input applies to only one large position. (4) Weighted averages are calculated based on the fair values of the instruments. (5) For equity securities, the price inputs are expressed on an absolute basis, not as a percentage of the notional amount. (6) Both trading and non-trading account derivatives—assets and liabilities—are presented on a gross absolute value basis. (7) Includes hybrid products.
Items measured at fair value of a nonrecurring basis	The following tables present the carrying amounts of all assets that were still held for which a nonrecurring fair value measurement was recorded: In millions of dollars Fair value Level 2 Level 3 June 30, 2021 Loans HFS (1) $ 587 $ 212 $ 375 Other real estate owned 22 — 22 Loans (2) 354 — 354 Non-marketable equity securities measured using the measurement alternative 487 152 335 Total assets at fair value on a nonrecurring basis $ 1,450 $ 364 $ 1,086 In millions of dollars Fair value Level 2 Level 3 December 31, 2020 Loans HFS (1) $ 3,375 $ 478 $ 2,897 Other real estate owned 17 4 13 Loans (2) 1,015 679 336 Non-marketable equity securities measured using the measurement alternative 315 312 3 Total assets at fair value on a nonrecurring basis $ 4,722 $ 1,473 $ 3,249 (1) Net of fair value amounts on the unfunded portion of loans HFS recognized as Other liabilities on the Consolidated Balance Sheet. (2) Represents impaired loans held for investment whose carrying amount is based on the fair value of the underlying collateral less costs to sell, primarily real estate.
Valuation techniques and inputs for Level 3 nonrecurring fair value measurements	The following tables present the valuation techniques covering the majority of Level 3 nonrecurring fair value measurements and the most significant unobservable inputs used in those measurements: As of June 30, 2021 Fair value (1) (in millions) Methodology Input Low (2) High Weighted average (3) Loans held-for-sale $ 375 Price-based Price $ 90.32 $ 100.00 $ 96.68 Other real estate owned $ 13 Recovery analysis Appraised value (4) $ 20,000 $ 1,800,000 $ 599,971 Loans (5) $ 224 Recovery analysis Appraised value (4) $ 4,000 $ 21,240,661 $ 4,002,656 128 Price-based Price 2.55 60.00 $ 29.10 Non-marketable equity securities measured using the measurement alternative $ 331 Price-based Price $ 5.41 $ 1,592.82 $ 468.68 As of December 31, 2020 Fair value (1) (in millions) Methodology Input Low (2) High Weighted average (3) Loans held-for-sale $ 2,683 Price-based Price $ 79 $ 100 $ 98 Other real estate owned $ 7 Price-based Appraised value (4) $ 3,110,711 $ 4,241,357 $ 3,586,975 4 Recovery analysis Price 51 51 51 Loans (5) $ 147 Price-based Price $ 2 $ 49 $ 23 73 Recovery analysis Recovery rate 0.99 % 78.00 % 13.37 % Appraised value (4) $ 34 $ 43,646,426 $ 17,762,950 (1) The table above includes the fair values for the items listed and may not foot to the total population for each category. (2) Some inputs are shown as zero due to rounding. (3) Weighted averages are calculated based on the fair values of the instruments. (4) Appraised values are disclosed in whole dollars. (5) Represents impaired loans held for investment whose carrying amount is based on the fair value of the underlying collateral less costs to sell, primarily real estate.
Changes in total nonrecurring fair value measurements	The following table presents total nonrecurring fair value measurements for the period, included in earnings, attributable to the change in fair value relating to assets that were still held: Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Loans HFS $ (15) $ 32 $ (17) $ (198) Other real estate owned — (1) — (1) Loans (1) 49 (266) 60 (189) Non-marketable equity securities measured using the measurement alternative 211 (52) 291 (29) Total nonrecurring fair value gains (losses) $ 245 $ (287) $ 334 $ (417) (1) Represents loans held for investment whose carrying amount is based on the fair value of the underlying collateral less costs to sell, primarily real estate.
Estimated fair value of financial instruments	The following tables present the carrying value and fair value of Citigroup’s financial instruments that are not carried at fair value. The tables below therefore exclude items measured at fair value on a recurring basis presented in the tables above. June 30, 2021 Estimated fair value Carrying Estimated In billions of dollars Level 1 Level 2 Level 3 Assets Investments, net of allowance $ 181.9 $ 183.4 $ 73.8 $ 106.9 $ 2.7 Securities borrowed and purchased under agreements to resell 121.2 121.2 — 120.9 0.3 Loans (1)(2) 649.3 665.2 — — 665.2 Other financial assets (2)(3) 397.9 397.9 279.3 19.9 98.7 Liabilities Deposits $ 1,307.5 $ 1,308.3 $ — $ 1,138.6 $ 169.7 Securities loaned and sold under agreements to repurchase 145.1 145.1 — 145.0 0.1 Long-term debt (4) 188.2 203.1 — 184.0 19.1 Other financial liabilities (5) 114.8 114.8 — 19.6 95.2 December 31, 2020 Estimated fair value Carrying Estimated In billions of dollars Level 1 Level 2 Level 3 Assets Investments, net of allowance $ 110.3 $ 113.2 $ 23.3 $ 87.0 $ 2.9 Securities borrowed and purchased under agreements to resell 109.5 109.5 — 109.5 — Loans (1)(2) 643.3 663.9 — 0.6 663.3 Other financial assets (2)(3) 383.2 383.2 291.5 18.1 73.6 Liabilities Deposits $ 1,278.7 $ 1,278.8 $ — $ 1,093.3 $ 185.5 Securities loaned and sold under agreements to repurchase 139.3 139.3 — 139.3 — Long-term debt (4) 204.6 221.2 — 197.8 23.4 Other financial liabilities (5) 102.4 102.4 — 19.2 83.2 (1) The carrying value of loans is net of the Allowance for credit losses on loans of $19.2 billion for June 30, 2021 and $25.0 billion for December 31, 2020. In addition, the carrying values exclude $0.6 billion and $0.7 billion of lease finance receivables at June 30, 2021 and December 31, 2020, respectively. (2) Includes items measured at fair value on a nonrecurring basis. (3) Includes cash and due from banks, deposits with banks, brokerage receivables, reinsurance recoverables and other financial instruments included in Other assets on the Consolidated Balance Sheet, for all of which the carrying value is a reasonable estimate of fair value. (4) The carrying value includes long-term debt balances under qualifying fair value hedges. (5) Includes brokerage payables, separate and variable accounts, short-term borrowings (carried at cost) and other financial instruments included in Other liabilities on the Consolidated Balance Sheet, for all of which the carrying value is a reasonable estimate of fair value.

FAIR VALUE ELECTIONS (Tables)

FAIR VALUE ELECTIONS (Tables)	6 Months Ended
	Jun. 30, 2021
Fair Value, Option, Aggregate Differences [Abstract]
Schedule of financial instruments selected for changes in fair value gains and losses	The following table presents the changes in fair value of those items for which the fair value option has been elected: Changes in fair value—gains (losses) Three Months Ended June 30, Six Months Ended June 30, In millions of dollars 2021 2020 2021 2020 Assets Securities borrowed and purchased under agreements to resell $ (8) $ (48) $ (36) $ 44 Trading account assets 52 373 153 (461) Loans Certain corporate loans 539 (154) 668 (1,017) Certain consumer loans — (1) — — Total loans $ 539 $ (155) $ 668 $ (1,017) Other assets MSRs $ (21) $ (26) $ 52 $ (169) Certain mortgage loans HFS (1) 47 72 44 134 Total other assets $ 26 $ 46 $ 96 $ (35) Total assets $ 609 $ 216 $ 881 $ (1,469) Liabilities Interest-bearing deposits $ (130) $ (164) $ (93) $ (52) Securities loaned and sold under agreements to repurchase 5 196 18 (92) Trading account liabilities 8 44 10 (17) Short-term borrowings (2) 327 (259) 192 997 Long-term debt (2) (2,441) (5,402) (433) 1,963 Total liabilities $ (2,231) $ (5,585) $ (306) $ 2,799 (1) Includes gains (losses) associated with interest rate lock commitments for those loans that have been originated and elected under the fair value option. (2) Includes DVA that is included in AOCI . See Notes 17 and 20 to the Consolidated Financial Statements.
Schedule of fair value of loans and other disclosures for certain credit related products	The following table provides information about certain credit products carried at fair value: June 30, 2021 December 31, 2020 In millions of dollars Trading assets Loans Trading assets Loans Carrying amount reported on the Consolidated Balance Sheet $ 8,594 $ 7,707 $ 8,063 $ 6,854 Aggregate unpaid principal balance in excess of (less than) fair value (203) (197) (915) (14) Balance of non-accrual loans or loans more than 90 days past due — 17 — 4 Aggregate unpaid principal balance in excess of (less than) fair value for non-accrual loans or loans more than 90 days past due — (15) — —
Schedule of fair value of loans and other disclosures for certain mortgage loans	The following table provides information about certain mortgage loans HFS carried at fair value: In millions of dollars June 30, December 31, 2020 Carrying amount reported on the Consolidated Balance Sheet $ 1,681 $ 1,742 Aggregate fair value in excess of (less than) unpaid principal balance 52 91 Balance of non-accrual loans or loans more than 90 days past due — — Aggregate unpaid principal balance in excess of fair value for non-accrual loans or loans more than 90 days past due — —
Schedule of carrying value of structured notes, disaggregated by type of embedded derivative instrument	The following table provides information about the carrying value of notes carried at fair value, disaggregated by type of risk: In billions of dollars June 30, 2021 December 31, 2020 Interest rate linked $ 38.9 $ 34.5 Foreign exchange linked 0.6 1.2 Equity linked 31.3 27.3 Commodity linked 2.9 1.4 Credit linked 2.7 2.6 Total $ 76.4 $ 67.0
Schedule of long-term debt carried at fair value, excluding debt issued by consolidated VIEs	The following table provides information about long-term debt carried at fair value: In millions of dollars June 30, 2021 December 31, 2020 Carrying amount reported on the Consolidated Balance Sheet $ 76,375 $ 67,063 Aggregate unpaid principal balance in excess of (less than) fair value (4,638) (5,130)
Schedule of short-term borrowings carried at fair value	The following table provides information about short-term borrowings carried at fair value: In millions of dollars June 30, 2021 December 31, 2020 Carrying amount reported on the Consolidated Balance Sheet $ 7,358 $ 4,683 Aggregate unpaid principal balance in excess of (less than) fair value — 68

GUARANTEES, LEASES AND COMMIT_2

GUARANTEES, LEASES AND COMMITMENTS (Tables)	6 Months Ended
	Jun. 30, 2021
Guarantees, Leases And Commitments [Abstract]
Schedule of guarantor obligations	The following tables present information about Citi’s guarantees at June 30, 2021 and December 31, 2020: Maximum potential amount of future payments In billions of dollars at June 30, 2021 Expire within Expire after Total amount Carrying value (in millions of dollars) Financial standby letters of credit $ 24.3 $ 68.2 $ 92.5 $ 882 Performance guarantees 6.8 5.9 12.7 48 Derivative instruments considered to be guarantees 16.1 58.5 74.6 304 Loans sold with recourse — 1.7 1.7 16 Securities lending indemnifications (1) 134.4 — 134.4 — Credit card merchant processing (2) 110.9 — 110.9 4 Credit card arrangements with partners — 0.8 0.8 7 Custody indemnifications and other — 24.2 24.2 37 Total $ 292.5 $ 159.3 $ 451.8 $ 1,298 Maximum potential amount of future payments In billions of dollars at December 31, 2020 Expire within Expire after Total amount Carrying value ( in millions of dollars) Financial standby letters of credit $ 25.3 $ 68.4 $ 93.7 $ 1,407 Performance guarantees 7.3 6.0 13.3 72 Derivative instruments considered to be guarantees 20.0 60.9 80.9 671 Loans sold with recourse — 1.2 1.2 9 Securities lending indemnifications (1) 112.2 — 112.2 — Credit card merchant processing (2) 101.9 — 101.9 3 Credit card arrangements with partners 0.2 0.8 1.0 7 Custody indemnifications and other — 37.3 37.3 35 Total $ 266.9 $ 174.6 $ 441.5 $ 2,204 (1) The carrying values of securities lending indemnifications were not material for either period presented, as the probability of potential liabilities arising from these guarantees is minimal. (2) At June 30, 2021 and December 31, 2020, this maximum potential exposure was estimated to be $111 billion and $102 billion, respectively. However, Citi believes that the maximum exposure is not representative of the actual potential loss exposure based on its historical experience. This contingent liability is unlikely to arise, as most products and services are delivered when purchased and amounts are refunded when items are returned to merchants.
Schedule of guarantor obligations by credit ratings	Presented in the tables below are the maximum potential amounts of future payments that are classified based on internal and external credit ratings. The determination of the maximum potential future payments is based on the notional amount of the guarantees without consideration of possible recoveries under recourse provisions or from collateral held or pledged. As such, Citi believes such amounts bear no relationship to the anticipated losses, if any, on these guarantees. Maximum potential amount of future payments In billions of dollars at June 30, 2021 Investment Non-investment Not Total Financial standby letters of credit $ 77.7 $ 14.7 $ 0.1 $ 92.5 Performance guarantees 10.1 2.6 — 12.7 Derivative instruments deemed to be guarantees — — 74.6 74.6 Loans sold with recourse — — 1.7 1.7 Securities lending indemnifications — — 134.4 134.4 Credit card merchant processing — — 110.9 110.9 Credit card arrangements with partners — — 0.8 0.8 Custody indemnifications and other 11.6 12.6 — 24.2 Total $ 99.4 $ 29.9 $ 322.5 $ 451.8 Maximum potential amount of future payments In billions of dollars at December 31, 2020 Investment Non-investment Not Total Financial standby letters of credit $ 78.5 $ 14.6 $ 0.6 $ 93.7 Performance guarantees 9.8 3.0 0.5 13.3 Derivative instruments deemed to be guarantees — — 80.9 80.9 Loans sold with recourse — — 1.2 1.2 Securities lending indemnifications — — 112.2 112.2 Credit card merchant processing — — 101.9 101.9 Credit card arrangements with partners — — 1.0 1.0 Custody indemnifications and other 24.9 12.4 — 37.3 Total $ 113.2 $ 30.0 $ 298.3 $ 441.5
Schedule of credit commitments	The table below summarizes Citigroup’s credit commitments: In millions of dollars U.S. Outside of June 30, December 31, Commercial and similar letters of credit $ 929 $ 4,840 $ 5,769 $ 5,221 One- to four-family residential mortgages 1,823 2,520 4,343 5,002 Revolving open-end loans secured by one- to four-family residential properties 7,687 1,154 8,841 9,626 Commercial real estate, construction and land development 14,959 1,507 16,466 12,867 Credit card lines 605,944 102,007 707,951 710,399 Commercial and other consumer loan commitments 214,023 120,988 335,011 322,458 Other commitments and contingencies 5,278 524 5,802 5,715 Total $ 850,643 $ 233,540 $ 1,084,183 $ 1,071,288
Schedule of restricted cash	Restricted cash is included on the Consolidated Balance Sheet within the following balance sheet lines: In millions of dollars June 30, December 31, Cash and due from banks $ 4,001 $ 3,774 Deposits with banks, net of allowance 13,750 14,203 Total $ 17,751 $ 17,977

CONDENSED CONSOLIDATING FINAN_2

CONDENSED CONSOLIDATING FINANCIAL STATEMENTS (Tables)	6 Months Ended
	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Condensed Consolidating Statements of Income and Comprehensive Income	Condensed Consolidating Statements of Income and Comprehensive Income Three Months Ended June 30, 2021 In millions of dollars Citigroup parent company CGMHI Other Citigroup subsidiaries and eliminations Consolidating adjustments Citigroup consolidated Revenues Dividends from subsidiaries $ 3,700 $ — $ — $ (3,700) $ — Interest revenue — 1,014 11,449 — 12,463 Interest revenue—intercompany 954 136 (1,090) — — Interest expense 1,209 221 834 — 2,264 Interest expense—intercompany 94 330 (424) — — Net interest revenue $ (349) $ 599 $ 9,949 $ — $ 10,199 Commissions and fees $ — $ 1,836 $ 1,538 $ — $ 3,374 Commissions and fees—intercompany (1) 88 (87) — — Principal transactions (892) 919 2,277 — 2,304 Principal transactions—intercompany 910 (110) (800) — — Other revenue (4) 139 1,462 — 1,597 Other revenue—intercompany 3 (8) 5 — — Total non-interest revenues $ 16 $ 2,864 $ 4,395 $ — $ 7,275 Total revenues, net of interest expense $ 3,367 $ 3,463 $ 14,344 $ (3,700) $ 17,474 Provisions for credit losses and for benefits and claims $ 2 $ 3 $ (1,071) $ — $ (1,066) Operating expenses Compensation and benefits $ — $ 1,303 $ 4,679 $ — $ 5,982 Compensation and benefits—intercompany 24 — (24) — — Other operating 14 680 4,516 — 5,210 Other operating—intercompany 3 808 (811) — — Total operating expenses $ 41 $ 2,791 $ 8,360 $ — $ 11,192 Equity in undistributed income of subsidiaries $ 2,567 $ — $ — $ (2,567) $ — Income (loss) from continuing operations before income taxes $ 5,891 $ 669 $ 7,055 $ (6,267) $ 7,348 Provision (benefit) for income taxes (302) (119) 1,576 — 1,155 Income (loss) from continuing operations $ 6,193 $ 788 $ 5,479 $ (6,267) $ 6,193 Income (loss) from discontinued operations, net of taxes — — 10 — 10 Net income before attribution of noncontrolling interests $ 6,193 $ 788 $ 5,489 $ (6,267) $ 6,203 Noncontrolling interests — — 10 — 10 Net income (loss) $ 6,193 $ 788 $ 5,479 $ (6,267) $ 6,193 Comprehensive income Add: Other comprehensive income (loss) $ (109) $ 7 $ (1,966) $ 1,959 $ (109) Total Citigroup comprehensive income (loss) $ 6,084 $ 795 $ 3,513 $ (4,308) $ 6,084 Add: Other comprehensive income attributable to noncontrolling interests $ — $ — $ 18 $ — $ 18 Add: Net income attributable to noncontrolling interests — — 10 — 10 Total comprehensive income (loss) $ 6,084 $ 795 $ 3,541 $ (4,308) $ 6,112 Condensed Consolidating Statements of Income and Comprehensive Income Six Months Ended June 30, 2021 In millions of dollars Citigroup parent company CGMHI Other Citigroup subsidiaries and eliminations Consolidating adjustments Citigroup consolidated Revenues Dividends from subsidiaries $ 3,800 $ — $ — $ (3,800) $ — Interest revenue — 1,985 23,012 — 24,997 Interest revenue—intercompany 1,912 281 (2,193) — — Interest expense 2,421 444 1,767 — 4,632 Interest expense—intercompany 178 659 (837) — — Net interest revenue $ (687) $ 1,163 $ 19,889 $ — $ 20,365 Commissions and fees $ — $ 3,997 $ 3,047 $ — $ 7,044 Commissions and fees—intercompany (27) 135 (108) — — Principal transactions 877 6,577 (1,237) — 6,217 Principal transactions—intercompany (968) (4,348) 5,316 — — Other revenue 51 242 2,882 — 3,175 Other revenue—intercompany (61) (28) 89 — — Total non-interest revenues $ (128) $ 6,575 $ 9,989 $ — $ 16,436 Total revenues, net of interest expense $ 2,985 $ 7,738 $ 29,878 $ (3,800) $ 36,801 Provisions for credit losses and for benefits and claims $ 2 $ 7 $ (3,130) $ — $ (3,121) Operating expenses Compensation and benefits $ 28 $ 2,637 $ 9,318 $ — $ 11,983 Compensation and benefits—intercompany 48 — (48) — — Other operating 25 1,322 8,935 — 10,282 Other operating—intercompany 6 1,488 (1,494) — — Total operating expenses $ 107 $ 5,447 $ 16,711 $ — $ 22,265 Equity in undistributed income of subsidiaries $ 10,740 $ — $ — $ (10,740) $ — Income (loss) from continuing operations before income taxes $ 13,616 $ 2,284 $ 16,297 $ (14,540) $ 17,657 Provision (benefit) for income taxes (519) 333 3,673 — 3,487 Income (loss) from continuing operations $ 14,135 $ 1,951 $ 12,624 $ (14,540) $ 14,170 Income (loss) from discontinued operations, net of taxes — — 8 — 8 Net income before attribution of noncontrolling interests $ 14,135 $ 1,951 $ 12,632 $ (14,540) $ 14,178 Noncontrolling interests — — 43 — 43 Net income (loss) $ 14,135 $ 1,951 $ 12,589 $ (14,540) $ 14,135 Comprehensive income Add: Other comprehensive income (loss) $ (3,062) $ (43) $ (1,429) $ 1,472 $ (3,062) Total Citigroup comprehensive income (loss) $ 11,073 $ 1,908 $ 11,160 $ (13,068) $ 11,073 Add: Other comprehensive income attributable to noncontrolling interests $ — $ — $ (40) $ — $ (40) Add: Net income attributable to noncontrolling interests — — 43 — 43 Total comprehensive income (loss) $ 11,073 $ 1,908 $ 11,163 $ (13,068) $ 11,076 Condensed Consolidating Statements of Income and Comprehensive Income Three Months Ended June 30, 2020 In millions of dollars Citigroup parent company CGMHI Other Citigroup subsidiaries and eliminations Consolidating adjustments Citigroup consolidated Revenues Dividends from subsidiaries $ — $ — $ — $ — $ — Interest revenue — 1,309 13,280 — 14,589 Interest revenue—intercompany 1,067 282 (1,349) — — Interest expense 1,265 380 1,864 — 3,509 Interest expense—intercompany 142 621 (763) — — Net interest revenue $ (340) $ 590 $ 10,830 $ — $ 11,080 Commissions and fees $ — $ 1,771 $ 1,162 $ — $ 2,933 Commissions and fees—intercompany — 73 (73) — — Principal transactions (258) (2,993) 7,408 — 4,157 Principal transactions—intercompany 62 4,890 (4,952) — — Other revenue (14) 211 1,399 — 1,596 Other revenue—intercompany 8 13 (21) — — Total non-interest revenues $ (202) $ 3,965 $ 4,923 $ — $ 8,686 Total revenues, net of interest expense $ (542) $ 4,555 $ 15,753 $ — $ 19,766 Provisions for credit losses and for benefits and claims $ — $ 1 $ 8,196 $ — $ 8,197 Operating expenses Compensation and benefits $ 105 $ 1,345 $ 4,174 $ — $ 5,624 Compensation and benefits—intercompany 1 — (1) — — Other operating 9 594 4,233 — 4,836 Other operating—intercompany 4 375 (379) — — Total operating expenses $ 119 $ 2,314 $ 8,027 $ — $ 10,460 Equity in undistributed income of subsidiaries $ 1,847 $ — $ — $ (1,847) $ — Income (loss) from continuing operations before income $ 1,186 $ 2,240 $ (470) $ (1,847) $ 1,109 Provision (benefit) for income taxes 130 715 (793) — 52 Income (loss) from continuing operations $ 1,056 $ 1,525 $ 323 $ (1,847) $ 1,057 Income (loss) from discontinued operations, net of taxes — — (1) — (1) Net income (loss) before attribution of noncontrolling interests $ 1,056 $ 1,525 $ 322 $ (1,847) $ 1,056 Noncontrolling interests — — — — — Net income (loss) $ 1,056 $ 1,525 $ 322 $ (1,847) $ 1,056 Comprehensive income Add: Other comprehensive income (loss) $ (824) $ (1,429) $ (1,223) $ 2,652 $ (824) Total Citigroup comprehensive income (loss) $ 232 $ 96 $ (901) $ 805 $ 232 Add: Other comprehensive income attributable to noncontrolling interests $ — $ — $ 39 $ — $ 39 Add: Net income attributable to noncontrolling interests — — — — — Total comprehensive income (loss) $ 232 $ 96 $ (862) $ 805 $ 271 Condensed Consolidating Statements of Income and Comprehensive Income Six Months Ended June 30, 2020 In millions of dollars Citigroup parent company CGMHI Other Citigroup subsidiaries and eliminations Consolidating adjustments Citigroup consolidated Revenues Dividends from subsidiaries $ 105 $ — $ — $ (105) $ — Interest revenue — 3,212 28,516 — 31,728 Interest revenue—intercompany 2,211 623 (2,834) — — Interest expense 2,408 1,521 5,227 — 9,156 Interest expense—intercompany 390 1,403 (1,793) — — Net interest revenue $ (587) $ 911 $ 22,248 $ — $ 22,572 Commissions and fees $ — $ 3,321 $ 2,633 $ — $ 5,954 Commissions and fees—intercompany (19) 237 (218) — — Principal transactions (930) 3,261 7,087 — 9,418 Principal transactions—intercompany 564 499 (1,063) — — Other revenue 66 260 2,227 — 2,553 Other revenue—intercompany (62) 26 36 — — Total non-interest revenues $ (381) $ 7,604 $ 10,702 $ — $ 17,925 Total revenues, net of interest expense $ (863) $ 8,515 $ 32,950 $ (105) $ 40,497 Provisions for credit losses and for benefits and claims $ — $ — $ 15,157 $ — $ 15,157 Operating expenses Compensation and benefits $ 133 $ 2,641 $ 8,504 $ — $ 11,278 Compensation and benefits—intercompany 75 — (75) — — Other operating 32 1,192 8,601 — 9,825 Other operating—intercompany 8 857 (865) — — Total operating expenses $ 248 $ 4,690 $ 16,165 $ — $ 21,103 Equity in undistributed income of subsidiaries $ 4,229 $ — $ — $ (4,229) $ — Income (loss) from continuing operations before income $ 3,118 $ 3,825 $ 1,628 $ (4,334) $ 4,237 Provision (benefit) for income taxes (474) 1,052 54 — 632 Income (loss) from continuing operations $ 3,592 $ 2,773 $ 1,574 $ (4,334) $ 3,605 Income (loss) from discontinued operations, net of taxes — — (19) — (19) Net income (loss) before attribution of noncontrolling interests $ 3,592 $ 2,773 $ 1,555 $ (4,334) $ 3,586 Noncontrolling interests — — (6) — (6) Net income (loss) $ 3,592 $ 2,773 $ 1,561 $ (4,334) $ 3,592 Comprehensive income Add: Other comprehensive income (loss) $ 2,973 $ 328 $ 12,236 $ (12,564) $ 2,973 Total Citigroup comprehensive income (loss) $ 6,565 $ 3,101 $ 13,797 $ (16,898) $ 6,565 Add: Other comprehensive income attributable to noncontrolling interests $ — $ — $ (12) $ — $ (12) Add: Net income attributable to noncontrolling interests — — (6) — (6) Total comprehensive income (loss) $ 6,565 $ 3,101 $ 13,779 $ (16,898) $ 6,547
Condensed Consolidating Balance Sheet	Condensed Consolidating Balance Sheet June 30, 2021 In millions of dollars Citigroup parent company CGMHI Other Citigroup subsidiaries and eliminations Consolidating adjustments Citigroup consolidated Assets Cash and due from banks $ — $ 723 $ 26,394 $ — $ 27,117 Cash and due from banks—intercompany 16 5,919 (5,935) — — Deposits with banks, net of allowance — 7,398 264,723 — 272,121 Deposits with banks—intercompany 3,000 8,915 (11,915) — — Securities borrowed and purchased under resale agreements — 251,864 57,183 — 309,047 Securities borrowed and purchased under resale agreements—intercompany — 25,247 (25,247) — — Trading account assets 264 222,808 147,878 — 370,950 Trading account assets—intercompany 1,069 9,759 (10,828) — — Investments, net of allowance 1 265 486,797 — 487,063 Loans, net of unearned income — 3,135 673,699 — 676,834 Loans, net of unearned income—intercompany — — — — — Allowance for credit losses on loans (ACLL) — — (19,238) — (19,238) Total loans, net $ — $ 3,135 $ 654,461 $ — $ 657,596 Advances to subsidiaries $ 153,845 $ — $ (153,845) $ — $ — Investments in subsidiaries 220,810 — — (220,810) — Other assets, net of allowance (1) 11,302 74,398 118,274 — 203,974 Other assets—intercompany 3,354 58,861 (62,215) — — Total assets $ 393,661 $ 669,292 $ 1,485,725 $ (220,810) $ 2,327,868 Liabilities and equity Deposits $ — $ — $ 1,310,281 $ — $ 1,310,281 Deposits—intercompany — — — — — Securities loaned and sold under repurchase agreements — 203,715 18,102 — 221,817 Securities loaned and sold under repurchase agreements—intercompany — 48,508 (48,508) — — Trading account liabilities 19 125,785 48,902 — 174,706 Trading account liabilities—intercompany 564 8,578 (9,142) — — Short-term borrowings — 15,681 15,781 — 31,462 Short-term borrowings—intercompany — 18,337 (18,337) — — Long-term debt 174,366 56,087 34,122 — 264,575 Long-term debt—intercompany — 77,668 (77,668) — — Advances from subsidiaries 13,747 — (13,747) — — Other liabilities, including allowance 2,806 61,526 57,785 — 122,117 Other liabilities—intercompany — 16,004 (16,004) — — Stockholders’ equity 202,159 37,403 184,158 (220,810) 202,910 Total liabilities and equity $ 393,661 $ 669,292 $ 1,485,725 $ (220,810) $ 2,327,868 (1) Other assets for Citigroup parent company at June 30, 2021 included $42.0 billion of placements to Citibank and its branches, of which $31.8 billion had a remaining term of less than 30 days. Condensed Consolidating Balance Sheet December 31, 2020 In millions of dollars Citigroup parent company CGMHI Other Citigroup subsidiaries and eliminations Consolidating adjustments Citigroup consolidated Assets Cash and due from banks $ — $ 628 $ 25,721 $ — $ 26,349 Cash and due from banks—intercompany 16 6,081 (6,097) — — Deposits with banks, net of allowance — 5,224 278,042 — 283,266 Deposits with banks—intercompany 4,500 8,179 (12,679) — — Securities borrowed and purchased under resale agreements — 238,718 55,994 — 294,712 Securities borrowed and purchased under resale agreements—intercompany — 24,309 (24,309) — — Trading account assets 307 222,278 152,494 — 375,079 Trading account assets—intercompany 723 9,400 (10,123) — — Investments, net of allowance 1 374 446,984 — 447,359 Loans, net of unearned income — 2,524 673,359 — 675,883 Loans, net of unearned income—intercompany — — — — — Allowance for credit losses on loans (ACLL) — — (24,956) — (24,956) Total loans, net $ — $ 2,524 $ 648,403 $ — $ 650,927 Advances to subsidiaries $ 152,383 $ — $ (152,383) $ — $ — Investments in subsidiaries 213,267 — — (213,267) — Other assets, net of allowance (1) 12,156 60,273 109,969 — 182,398 Other assets—intercompany 2,781 51,489 (54,270) — — Total assets $ 386,134 $ 629,477 $ 1,457,746 $ (213,267) $ 2,260,090 Liabilities and equity Deposits $ — $ — $ 1,280,671 $ — $ 1,280,671 Deposits—intercompany — — — — — Securities loaned and sold under repurchase agreements — 184,786 14,739 — 199,525 Securities loaned and sold under repurchase agreements—intercompany — 76,590 (76,590) — — Trading account liabilities — 113,100 54,927 — 168,027 Trading account liabilities—intercompany 397 8,591 (8,988) — — Short-term borrowings — 12,323 17,191 — 29,514 Short-term borrowings—intercompany — 12,757 (12,757) — — Long-term debt 170,563 47,732 53,391 — 271,686 Long-term debt—intercompany — 67,322 (67,322) — — Advances from subsidiaries 12,975 — (12,975) — — Other liabilities, including allowance 2,692 55,217 52,558 — 110,467 Other liabilities—intercompany 65 15,378 (15,443) — — Stockholders’ equity 199,442 35,681 178,344 (213,267) 200,200 Total liabilities and equity $ 386,134 $ 629,477 $ 1,457,746 $ (213,267) $ 2,260,090 (1) Other assets
Condensed Consolidating Statement of Cash Flows	Condensed Consolidating Statement of Cash Flows Six Months Ended June 30, 2021 In millions of dollars Citigroup parent company CGMHI Other Citigroup subsidiaries and eliminations Consolidating adjustments Citigroup consolidated Net cash provided by operating activities of continuing operations $ 1,429 $ 5,912 $ 16,222 $ — $ 23,563 Cash flows from investing activities of continuing operations Purchases of investments $ — $ — $ (201,567) $ — $ (201,567) Proceeds from sales of investments — — 66,477 — 66,477 Proceeds from maturities of investments — — 75,195 — 75,195 Change in loans — — (3,088) — (3,088) Proceeds from sales and securitizations of loans — — 869 — 869 Change in securities borrowed and purchased under agreements to resell — (14,084) (251) — (14,335) Changes in investments and advances—intercompany (2,424) (7,360) 9,784 — — Other investing activities — (15) (1,647) — (1,662) Net cash used in investing activities of continuing operations $ (2,424) $ (21,459) $ (54,228) $ — $ (78,111) Cash flows from financing activities of continuing operations Dividends paid $ (2,663) $ (187) $ 187 $ — $ (2,663) Issuance of preferred stock 2,300 — — — 2,300 Redemption of preferred stock (3,785) — — — (3,785) Treasury stock acquired (4,381) — — — (4,381) Proceeds (repayments) from issuance of long-term debt, net 7,576 8,446 (16,405) — (383) Proceeds (repayments) from issuance of long-term debt—intercompany, net — 11,040 (11,040) — — Change in deposits — — 29,610 — 29,610 Change in securities loaned and sold under agreements to repurchase — (9,152) 31,444 — 22,292 Change in short-term borrowings — 3,358 (1,410) — 1,948 Net change in short-term borrowings and other advances—intercompany 772 4,885 (5,657) — — Other financing activities (324) — — — (324) Net cash provided by (used in) financing activities of continuing operations $ (505) $ 18,390 $ 26,729 $ — $ 44,614 Effect of exchange rate changes on cash and due from banks $ — $ — $ (443) $ — $ (443) Change in cash and due from banks and deposits with banks $ (1,500) $ 2,843 $ (11,720) $ — $ (10,377) Cash and due from banks and deposits with banks at beginning of period 4,516 20,112 284,987 — 309,615 Cash and due from banks and deposits with banks at end of period $ 3,016 $ 22,955 $ 273,267 $ — $ 299,238 Cash and due from banks $ 16 $ 6,642 $ 20,459 $ — $ 27,117 Deposits with banks, net of allowance 3,000 16,313 252,808 — 272,121 Cash and due from banks and deposits with banks at end of period $ 3,016 $ 22,955 $ 273,267 $ — $ 299,238 Supplemental disclosure of cash flow information for continuing operations Cash paid (received) during the period for income taxes $ (1,437) $ 649 $ 2,964 $ — $ 2,176 Cash paid during the period for interest 1,287 1,197 2,061 — 4,545 Non-cash investing activities Transfers to loans HFS from loans $ — $ — $ 961 $ — $ 961 Condensed Consolidating Statement of Cash Flows Six Months Ended June 30, 2020 In millions of dollars Citigroup parent company CGMHI Other Citigroup subsidiaries and eliminations Consolidating adjustments Citigroup consolidated Net cash provided by (used in) operating activities of continuing operations $ 2,857 $ (53,782) $ 31,717 $ — $ (19,208) Cash flows from investing activities of continuing operations Purchases of investments $ — $ — $ (207,701) $ — $ (207,701) Proceeds from sales of investments — — 86,191 — 86,191 Proceeds from maturities of investments — — 53,909 — 53,909 Change in loans — — 7,943 — 7,943 Proceeds from sales and securitizations of loans — — 826 — 826 Change in securities borrowed and purchased under agreements to resell — (29,475) (2,120) — (31,595) Changes in investments and advances—intercompany (7,371) (4,890) 12,261 — — Other investing activities — — (1,262) — (1,262) Net cash used in investing activities of continuing operations $ (7,371) $ (34,365) $ (49,953) $ — $ (91,689) Cash flows from financing activities of continuing operations Dividends paid $ (2,679) $ — $ — $ — $ (2,679) Issuance of preferred stock 1,500 — — — 1,500 Redemption of preferred stock (1,500) — — — (1,500) Treasury stock acquired (2,925) — — — (2,925) Proceeds (repayments) from issuance of long-term debt, net 17,353 8,907 (86) — 26,174 Proceeds (repayments) from issuance of long-term debt—intercompany, net — 6,815 (6,815) — — Change in deposits — — 163,070 — 163,070 Change in securities loaned and sold under agreements to repurchase — 68,650 (19,267) — 49,383 Change in short-term borrowings — 1,074 (5,967) — (4,893) Net change in short-term borrowings and other advances—intercompany (6,826) 3,035 3,791 — — Other financing activities (407) (118) 118 — (407) Net cash provided by financing activities of continuing operations $ 4,516 $ 88,363 $ 134,844 $ — $ 227,723 Effect of exchange rate changes on cash and due from banks $ — $ — $ (972) $ — $ (972) Change in cash and due from banks and deposits with banks $ 2 $ 216 $ 115,636 $ — $ 115,854 Cash and due from banks and deposits with banks at beginning of period 3,021 16,441 174,457 — 193,919 Cash and due from banks and deposits with banks at end of period $ 3,023 $ 16,657 $ 290,093 $ — $ 309,773 Cash and due from banks $ 23 $ 3,728 $ 19,138 $ — $ 22,889 Deposits with banks, net of allowance 3,000 12,929 270,955 — 286,884 Cash and due from banks and deposits with banks at end of period $ 3,023 $ 16,657 $ 290,093 $ — $ 309,773 Supplemental disclosure of cash flow information for continuing operations Cash paid during the period for income taxes $ 39 $ 174 $ 2,330 $ — $ 2,543 Cash paid during the period for interest 1,757 3,006 3,988 — 8,751 Non-cash investing activities Transfers to loans HFS from loans $ — $ — $ 1,036 $ — $ 1,036

BASIS OF PRESENTATION, UPDATE_3

BASIS OF PRESENTATION, UPDATED ACCOUNTING POLICIES AND ACCOUNTING CHANGES - Accounting Changes (Details) - USD ($) $ in Millions	Jan. 01, 2020	Jun. 30, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		$ 19,238		$ 26,298	$ 20,380	$ 19,238	$ 26,298	$ 21,638	$ 24,956	$ 12,783
Pretax percentage increase allowance for credit losses	29.00%
Increase (decrease) in retained earnings		179,686				179,686			168,272
Build to allowance for credit losses		(2,184)		5,195		(5,252)	9,289
Decrease in other assets		(116,089)				(116,089)			(110,683)
Increase (decrease) in provisions for credit losses on loans		(1,126)		7,990		(2,605)	14,367
Increase in operating expenses		$ 11,192		10,460		$ 22,265	$ 21,103
Variable post-charge-off third-party collection costs
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses	$ (443)				0			0	0	(443)
Increase (decrease) in retained earnings	330
Decrease in other assets	113
Increase (decrease) in provisions for credit losses on loans			$ 122	339	(18)
Increase in operating expenses				$ 45	49
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses	4,100				$ 0			$ 0	$ 0	$ 4,201
Increase (decrease) in retained earnings	(3,100)
Increase in deferred tax assets	1,000
Build to allowance for credit losses	4,900
Release of reserves	$ 800
Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loss coverage period	23 months
Accounting Guidance Prior to Adoption of Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loss coverage period	14 months

DISCONTINUED OPERATIONS AND S_3

DISCONTINUED OPERATIONS AND SIGNIFICANT DISPOSALS - Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Results of Discontinued Operations
Total revenues, net of interest expense	$ 0	$ 0	$ 0	$ 0
Income (loss) from discontinued operations	10	(1)	8	(19)
Benefit for income taxes	0	0	0	0
Income (loss) from discontinued operations, net of taxes	$ 10	$ (1)	$ 8	$ (19)

BUSINESS SEGMENTS (Details)

BUSINESS SEGMENTS (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)segment	Jun. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Segment Reporting [Abstract]
Number of business segments | segment			2
Segment Reporting Information [Line Items]
Revenues, net of interest expense	$ 17,474	$ 19,766	$ 36,801	$ 40,497
Provision (benefits) for income taxes	1,155	52	3,487	632
Income (loss) from continuing operations	6,193	1,057	14,170	3,605
Identifiable assets	2,327,868		2,327,868		$ 2,260,090
Operating Segments | Citicorp | North America
Segment Reporting Information [Line Items]
Revenues, net of interest expense	7,900	9,700	17,200	19,900
Operating Segments | Citicorp | EMEA
Segment Reporting Information [Line Items]
Revenues, net of interest expense	3,300	3,400	7,000	6,900
Operating Segments | Citicorp | Latin America
Segment Reporting Information [Line Items]
Revenues, net of interest expense	2,200	2,300	4,400	4,900
Operating Segments | Citicorp | Asia
Segment Reporting Information [Line Items]
Revenues, net of interest expense	3,800	4,100	7,900	8,500
Operating Segments | Global Consumer Banking
Segment Reporting Information [Line Items]
Revenues, net of interest expense	6,820	7,339	13,857	15,513
Provision (benefits) for income taxes	573	(257)	1,230	(538)
Income (loss) from continuing operations	1,832	(705)	4,003	(1,489)
Identifiable assets	432,000		432,000		434,000
Provisions for credit losses and for benefits and claims	(100)	4,200	(300)	8,900
Operating Segments | Institutional Clients Group
Segment Reporting Information [Line Items]
Revenues, net of interest expense	10,387	12,137	22,607	24,621
Provision (benefits) for income taxes	1,104	455	2,830	1,484
Income (loss) from continuing operations	3,829	1,822	9,767	5,396
Identifiable assets	1,795,000		1,795,000		1,730,000
Provisions for credit losses and for benefits and claims	(800)	3,900	(2,600)	5,900
Corporate/Other
Segment Reporting Information [Line Items]
Revenues, net of interest expense	267	290	337	363
Provision (benefits) for income taxes	(522)	(146)	(573)	(314)
Income (loss) from continuing operations	532	(60)	400	(302)
Identifiable assets	101,000		101,000		$ 96,000
Provisions for credit losses and for benefits and claims	$ (100)	$ 200	$ (200)	$ 400

INTEREST REVENUE AND EXPENSE (D

INTEREST REVENUE AND EXPENSE (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Interest revenue
Loan interest, including fees	$ 8,733	$ 10,149	$ 17,642	$ 21,399
Deposits with banks	126	159	271	686
Securities borrowed and purchased under agreements to resell	205	401	499	1,609
Investments, including dividends	1,818	2,097	3,570	4,378
Trading account assets	1,470	1,673	2,807	3,263
Other interest-bearing assets	111	110	208	393
Total interest revenue	12,463	14,589	24,997	31,728
Interest expense
Deposits	955	1,469	2,007	4,083
Securities loaned and sold under agreements to repurchase	260	453	513	1,538
Trading account liabilities	150	144	264	383
Short-term borrowings and other interest-bearing liabilities	31	140	62	524
Long-term debt	868	1,303	1,786	2,628
Total interest expense	2,264	3,509	4,632	9,156
Net interest revenue	10,199	11,080	20,365	22,572
Provision (benefit) for credit losses on loans	(1,126)	7,990	(2,605)	14,367
Net interest revenue after provision for credit losses on loans	11,325	3,090	22,970	8,205
Insurance fees and charges	$ 279	$ 270	$ 619	$ 495

COMMISSIONS AND FEES; ADMINIS_3

COMMISSIONS AND FEES; ADMINISTRATION AND OTHER FIDUCIARY FEES - Commissions and Fees Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Commissions and fees
Total commissions and fees	$ 3,374	$ 2,933	$ 7,044	$ 5,954
Investment banking
Commissions and fees
Total commissions and fees	1,386	1,358	3,010	2,398
Brokerage commissions
Commissions and fees
Total commissions and fees	821	686	1,763	1,512
Interchange fees
Commissions and fees
Total commissions and fees	2,470	1,628	4,534	3,806
Card-related loan fees
Commissions and fees
Total commissions and fees	177	135	359	312
Card rewards and partner payments
Commissions and fees
Total commissions and fees	(2,515)	(1,815)	(4,686)	(4,057)
Deposit-related fees
Commissions and fees
Total commissions and fees	325	305	654	653
Transactional service fees
Commissions and fees
Total commissions and fees	277	235	542	486
Corporate finance
Commissions and fees
Total commissions and fees	180	149	338	295
Insurance distribution revenue
Commissions and fees
Total commissions and fees	113	114	248	243
Insurance premiums
Commissions and fees
Total commissions and fees	30	31	50	74
Loan servicing
Commissions and fees
Total commissions and fees	24	31	47	70
Other
Commissions and fees
Total commissions and fees	86	76	185	162
Overdraft fees
Commissions and fees
Total commissions and fees	24	20	47	51
Commissions and fees
Commissions and fees
Revenue not accounted for under ASC 606, revenue from contracts with customers	(2,073)	(1,426)	(3,822)	(3,228)
ICG
Commissions and fees
Total commissions and fees	2,743	2,526	5,771	4,926
ICG | Investment banking
Commissions and fees
Total commissions and fees	1,386	1,358	3,010	2,398
ICG | Brokerage commissions
Commissions and fees
Total commissions and fees	528	482	1,143	1,059
ICG | Interchange fees
Commissions and fees
Total commissions and fees	197	123	355	384
ICG | Card-related loan fees
Commissions and fees
Total commissions and fees	7	3	12	14
ICG | Card rewards and partner payments
Commissions and fees
Total commissions and fees	(104)	(70)	(179)	(219)
ICG | Deposit-related fees
Commissions and fees
Total commissions and fees	260	220	504	453
ICG | Transactional service fees
Commissions and fees
Total commissions and fees	251	215	492	442
ICG | Corporate finance
Commissions and fees
Total commissions and fees	180	149	338	295
ICG | Insurance distribution revenue
Commissions and fees
Total commissions and fees	1	1	6	5
ICG | Insurance premiums
Commissions and fees
Total commissions and fees	0	0	0	0
ICG | Loan servicing
Commissions and fees
Total commissions and fees	10	18	22	38
ICG | Other
Commissions and fees
Total commissions and fees	27	27	68	57
GCB
Commissions and fees
Total commissions and fees	624	402	1,262	1,015
GCB | Investment banking
Commissions and fees
Total commissions and fees	0	0	0	0
GCB | Brokerage commissions
Commissions and fees
Total commissions and fees	293	204	620	453
GCB | Interchange fees
Commissions and fees
Total commissions and fees	2,273	1,505	4,179	3,422
GCB | Card-related loan fees
Commissions and fees
Total commissions and fees	170	132	347	298
GCB | Card rewards and partner payments
Commissions and fees
Total commissions and fees	(2,411)	(1,745)	(4,507)	(3,838)
GCB | Deposit-related fees
Commissions and fees
Total commissions and fees	65	85	150	200
GCB | Transactional service fees
Commissions and fees
Total commissions and fees	26	20	50	44
GCB | Corporate finance
Commissions and fees
Total commissions and fees	0	0	0	0
GCB | Insurance distribution revenue
Commissions and fees
Total commissions and fees	112	113	242	238
GCB | Insurance premiums
Commissions and fees
Total commissions and fees	30	31	50	74
GCB | Loan servicing
Commissions and fees
Total commissions and fees	10	11	17	22
GCB | Other
Commissions and fees
Total commissions and fees	56	46	114	102
Corporate/Other
Commissions and fees
Total commissions and fees	7	5	11	13
Corporate/Other | Investment banking
Commissions and fees
Total commissions and fees	0	0	0	0
Corporate/Other | Brokerage commissions
Commissions and fees
Total commissions and fees	0	0	0	0
Corporate/Other | Interchange fees
Commissions and fees
Total commissions and fees	0	0	0	0
Corporate/Other | Card-related loan fees
Commissions and fees
Total commissions and fees	0	0	0	0
Corporate/Other | Card rewards and partner payments
Commissions and fees
Total commissions and fees	0	0	0	0
Corporate/Other | Deposit-related fees
Commissions and fees
Total commissions and fees	0	0	0	0
Corporate/Other | Transactional service fees
Commissions and fees
Total commissions and fees	0	0	0	0
Corporate/Other | Corporate finance
Commissions and fees
Total commissions and fees	0	0	0	0
Corporate/Other | Insurance distribution revenue
Commissions and fees
Total commissions and fees	0	0	0	0
Corporate/Other | Insurance premiums
Commissions and fees
Total commissions and fees	0	0	0	0
Corporate/Other | Loan servicing
Commissions and fees
Total commissions and fees	4	2	8	10
Corporate/Other | Other
Commissions and fees
Total commissions and fees	$ 3	$ 3	$ 3	$ 3

COMMISSIONS AND FEES; ADMINIS_4

COMMISSIONS AND FEES; ADMINISTRATION AND OTHER FIDUCIARY FEES - Administration and Other Fiduciary Fees (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Commissions and fees
Administration and other fiduciary fees	$ 1,022	$ 819	$ 1,983	$ 1,673
Custody fees
Commissions and fees
Administration and other fiduciary fees	503	399	960	788
Custody fees | ICG
Commissions and fees
Administration and other fiduciary fees	497	372	948	738
Custody fees | GCB
Commissions and fees
Administration and other fiduciary fees	6	6	12	14
Custody fees | Corporate/Other
Commissions and fees
Administration and other fiduciary fees	0	21	0	36
Fiduciary fees
Commissions and fees
Administration and other fiduciary fees	372	290	731	618
Fiduciary fees | ICG
Commissions and fees
Administration and other fiduciary fees	200	158	392	330
Fiduciary fees | GCB
Commissions and fees
Administration and other fiduciary fees	169	132	336	288
Fiduciary fees | Corporate/Other
Commissions and fees
Administration and other fiduciary fees	3	0	3	0
Guarantee fees
Commissions and fees
Administration and other fiduciary fees	147	130	292	267
Guarantee fees | ICG
Commissions and fees
Administration and other fiduciary fees	143	127	285	261
Guarantee fees | GCB
Commissions and fees
Administration and other fiduciary fees	2	1	4	3
Guarantee fees | Corporate/Other
Commissions and fees
Administration and other fiduciary fees	2	2	3	3
Administration and other fiduciary fees
Commissions and fees
Administration and other fiduciary fees	1,022	819	1,983	1,673
Revenue not accounted for under ASC 606, revenue from contracts with customers	147	130	292	267
Administration and other fiduciary fees | ICG
Commissions and fees
Administration and other fiduciary fees	840	657	1,625	1,329
Administration and other fiduciary fees | GCB
Commissions and fees
Administration and other fiduciary fees	177	139	352	305
Administration and other fiduciary fees | Corporate/Other
Commissions and fees
Administration and other fiduciary fees	$ 5	$ 23	$ 6	$ 39

PRINCIPAL TRANSACTIONS (Details

PRINCIPAL TRANSACTIONS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Principal transactions revenue
Principal transactions revenue	$ 2,304	$ 4,157	$ 6,217	$ 9,418
Interest rate risks
Principal transactions revenue
Principal transactions revenue	530	1,847	1,964	3,757
Foreign exchange risks
Principal transactions revenue
Principal transactions revenue	965	1,114	1,927	2,109
Equity risks
Principal transactions revenue
Principal transactions revenue	358	103	1,203	921
Commodity and other risks
Principal transactions revenue
Principal transactions revenue	393	365	593	760
Credit products and risks
Principal transactions revenue
Principal transactions revenue	$ 58	$ 728	$ 530	$ 1,871

RETIREMENT BENEFITS - Net (Bene

RETIREMENT BENEFITS - Net (Benefit) Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
U.S. | Pension Plans
Service-related expense
Benefits earned during the period	$ 0	$ 0	$ 0	$ 0
Interest cost on benefit obligation	95	101	177	207
Expected return on plan assets	(174)	(206)	(356)	(414)
Amortization of unrecognized:
Prior service cost (benefit)	0	0	1	1
Net actuarial loss	54	53	116	109
Settlement loss	0	0	0	0
Total net expense	(25)	(52)	(62)	(97)
U.S. | Postretirement Benefit Plans
Service-related expense
Benefits earned during the period	0	0	0	0
Interest cost on benefit obligation	3	5	6	10
Expected return on plan assets	(3)	(4)	(7)	(9)
Amortization of unrecognized:
Prior service cost (benefit)	(2)	0	(4)	0
Net actuarial loss	(1)	0	(1)	0
Settlement loss	0	0	0	0
Total net expense	(3)	1	(6)	1
Non-U.S. plans | Pension Plans
Service-related expense
Benefits earned during the period	38	34	77	71
Interest cost on benefit obligation	70	61	132	125
Expected return on plan assets	(63)	(56)	(124)	(121)
Amortization of unrecognized:
Prior service cost (benefit)	(2)	(2)	(3)	(3)
Net actuarial loss	14	17	32	34
Settlement loss	4	3	4	3
Total net expense	61	57	118	109
Non-U.S. plans | Postretirement Benefit Plans
Service-related expense
Benefits earned during the period	2	2	4	4
Interest cost on benefit obligation	24	22	49	46
Expected return on plan assets	(21)	(18)	(43)	(38)
Amortization of unrecognized:
Prior service cost (benefit)	(3)	(2)	(5)	(4)
Net actuarial loss	3	5	8	10
Settlement loss	0	0	0	0
Total net expense	$ 5	$ 9	$ 13	$ 18

RETIREMENT BENEFITS - Funded St

RETIREMENT BENEFITS - Funded Status and Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
U.S. | Pension Plans
Change in projected benefit obligation
Projected benefit obligation at beginning of year		$ 13,815		$ 13,815
Benefits earned during the period	$ 0		$ 0	0	$ 0
Interest cost on benefit obligation	95		101	177	207
Change in plan assets
Plan assets at fair value at beginning of year		13,309		13,309
Net amount recognized at period end
Benefit asset	802			802
Benefit liability	(680)			(680)
Net amount recognized on the balance sheet—Significant Plans	122			122
Amounts recognized in AOCI at period end
Prior service benefit	0			0
Net actuarial (loss) gain	(6,611)			(6,611)
Net amount recognized in equity-pretax	(6,611)			(6,611)
Accumulated benefit obligation at period end—Significant Plans	13,071			13,071
U.S. | Pension Plans | Other than Significant Plans Measured Annually
Change in projected benefit obligation
Projected benefit obligation at beginning of year		25		25
Change in plan assets
Plan assets at fair value at beginning of year		0		0
U.S. | Pension Plans | Significant Plans Measured Quarterly
Change in projected benefit obligation
Projected benefit obligation at beginning of year	12,807	13,790		13,790
Quarter activity		(983)
Benefits earned during the period	0
Interest cost on benefit obligation	95
Actuarial loss	429
Benefits paid, net of participants’ contributions and government subsidy	(259)
Foreign exchange impact and other	0
Projected benefit obligation at period end—Significant Plans	13,072	12,807		13,072
Change in plan assets
Plan assets at fair value at beginning of year	12,874	13,309		13,309
Quarterly activity		(435)
Actual return on plan assets	566
Company contributions, net of reimbursements	13
Benefits paid, net of participants’ contributions and government subsidy	(259)
Foreign exchange impact and other	0
Plan assets at fair value at period end—Significant Plans	13,194	12,874		13,194
Funded status of the Significant Plans	122			122
U.S. | Postretirement Benefit Plans
Change in projected benefit obligation
Projected benefit obligation at beginning of year		559		559
Benefits earned during the period	0		0	0	0
Interest cost on benefit obligation	3		5	6	10
Change in plan assets
Plan assets at fair value at beginning of year		331		331
Net amount recognized at period end
Benefit asset	0			0
Benefit liability	(188)			(188)
Net amount recognized on the balance sheet—Significant Plans	(188)			(188)
Amounts recognized in AOCI at period end
Prior service benefit	97			97
Net actuarial (loss) gain	85			85
Net amount recognized in equity-pretax	182			182
Accumulated benefit obligation at period end—Significant Plans	516			516
U.S. | Postretirement Benefit Plans | Other than Significant Plans Measured Annually
Change in projected benefit obligation
Projected benefit obligation at beginning of year		0		0
Change in plan assets
Plan assets at fair value at beginning of year		0		0
U.S. | Postretirement Benefit Plans | Significant Plans Measured Quarterly
Change in projected benefit obligation
Projected benefit obligation at beginning of year	522	559		559
Quarter activity		(37)
Benefits earned during the period	0
Interest cost on benefit obligation	3
Actuarial loss	0
Benefits paid, net of participants’ contributions and government subsidy	(9)
Foreign exchange impact and other	0
Projected benefit obligation at period end—Significant Plans	516	522		516
Change in plan assets
Plan assets at fair value at beginning of year	323	331		331
Quarterly activity		(8)
Actual return on plan assets	10
Company contributions, net of reimbursements	4
Benefits paid, net of participants’ contributions and government subsidy	(9)
Foreign exchange impact and other	0
Plan assets at fair value at period end—Significant Plans	328	323		328
Funded status of the Significant Plans	(188)			(188)
Non-U.S. plans | Pension Plans
Change in projected benefit obligation
Projected benefit obligation at beginning of year		8,629		8,629
Benefits earned during the period	38		34	77	71
Interest cost on benefit obligation	70		61	132	125
Change in plan assets
Plan assets at fair value at beginning of year		7,831		7,831
Net amount recognized at period end
Benefit asset	789			789
Benefit liability	(596)			(596)
Net amount recognized on the balance sheet—Significant Plans	193			193
Amounts recognized in AOCI at period end
Prior service benefit	0			0
Net actuarial (loss) gain	(976)			(976)
Net amount recognized in equity-pretax	(976)			(976)
Accumulated benefit obligation at period end—Significant Plans	5,641			5,641
Non-U.S. plans | Pension Plans | Other than Significant Plans Measured Annually
Change in projected benefit obligation
Projected benefit obligation at beginning of year		2,248		2,248
Change in plan assets
Plan assets at fair value at beginning of year		1,500		1,500
Non-U.S. plans | Pension Plans | Significant Plans Measured Quarterly
Change in projected benefit obligation
Projected benefit obligation at beginning of year	5,809	6,381		6,381
Quarter activity		(572)
Benefits earned during the period	22
Interest cost on benefit obligation	59
Actuarial loss	25
Benefits paid, net of participants’ contributions and government subsidy	(76)
Foreign exchange impact and other	108
Projected benefit obligation at period end—Significant Plans	5,947	5,809		5,947
Change in plan assets
Plan assets at fair value at beginning of year	5,927	6,331		6,331
Quarterly activity		(404)
Actual return on plan assets	157
Company contributions, net of reimbursements	18
Benefits paid, net of participants’ contributions and government subsidy	(76)
Foreign exchange impact and other	114
Plan assets at fair value at period end—Significant Plans	6,140	5,927		6,140
Funded status of the Significant Plans	193			193
Non-U.S. plans | Postretirement Benefit Plans
Change in projected benefit obligation
Projected benefit obligation at beginning of year		1,390		1,390
Benefits earned during the period	2		2	4	4
Interest cost on benefit obligation	24		$ 22	49	$ 46
Change in plan assets
Plan assets at fair value at beginning of year		1,146		1,146
Net amount recognized at period end
Benefit asset	109			109
Benefit liability	0			0
Net amount recognized on the balance sheet—Significant Plans	109			109
Amounts recognized in AOCI at period end
Prior service benefit	54			54
Net actuarial (loss) gain	(243)			(243)
Net amount recognized in equity-pretax	(189)			(189)
Accumulated benefit obligation at period end—Significant Plans	1,020			1,020
Non-U.S. plans | Postretirement Benefit Plans | Other than Significant Plans Measured Annually
Change in projected benefit obligation
Projected benefit obligation at beginning of year		277		277
Change in plan assets
Plan assets at fair value at beginning of year		8		8
Non-U.S. plans | Postretirement Benefit Plans | Significant Plans Measured Quarterly
Change in projected benefit obligation
Projected benefit obligation at beginning of year	967	1,113		1,113
Quarter activity		(146)
Benefits earned during the period	1
Interest cost on benefit obligation	23
Actuarial loss	20
Benefits paid, net of participants’ contributions and government subsidy	(18)
Foreign exchange impact and other	27
Projected benefit obligation at period end—Significant Plans	1,020	967		1,020
Change in plan assets
Plan assets at fair value at beginning of year	1,094	1,138		1,138
Quarterly activity		(44)
Actual return on plan assets	24
Company contributions, net of reimbursements	0
Benefits paid, net of participants’ contributions and government subsidy	(18)
Foreign exchange impact and other	29
Plan assets at fair value at period end—Significant Plans	1,129	$ 1,094		1,129
Funded status of the Significant Plans	109			109
Qualified plans | U.S. | Pension Plans | Significant Plans Measured Quarterly
Change in plan assets
Funded status of the Significant Plans	802			802
Qualified plans | U.S. | Postretirement Benefit Plans | Significant Plans Measured Quarterly
Change in plan assets
Funded status of the Significant Plans	(188)			(188)
Qualified plans | Non-U.S. plans | Pension Plans | Significant Plans Measured Quarterly
Change in plan assets
Funded status of the Significant Plans	193			193
Qualified plans | Non-U.S. plans | Postretirement Benefit Plans | Significant Plans Measured Quarterly
Change in plan assets
Funded status of the Significant Plans	109			109
Nonqualified plans | U.S. | Pension Plans | Significant Plans Measured Quarterly
Change in plan assets
Funded status of the Significant Plans	(680)			(680)
Nonqualified plans | U.S. | Postretirement Benefit Plans | Significant Plans Measured Quarterly
Change in plan assets
Funded status of the Significant Plans	0			0
Nonqualified plans | Non-U.S. plans | Pension Plans | Significant Plans Measured Quarterly
Change in plan assets
Funded status of the Significant Plans	0			0
Nonqualified plans | Non-U.S. plans | Postretirement Benefit Plans | Significant Plans Measured Quarterly
Change in plan assets
Funded status of the Significant Plans	$ 0			$ 0

RETIREMENT BENEFITS - Accumulat

RETIREMENT BENEFITS - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Change in accumulated other comprehensive income (loss)
Balance, beginning of period				$ 200,200
Change, net of tax	[1]	$ 87	$ (77)	801	$ (363)
Balance, end of period		202,910	192,386	202,910	192,386
Benefit plans
Change in accumulated other comprehensive income (loss)
Balance, beginning of period		(6,150)	(7,095)	(6,864)	(6,809)
Actuarial assumptions changes and plan experience		(480)		950
Net asset gain (loss) due to difference between actual and expected returns		509		(209)
Net amortization		66		147
Curtailment/settlement gain		(4)		(4)
Foreign exchange impact and other		(7)		107
Change in deferred taxes, net		3		(190)
Change, net of tax		87		801
Balance, end of period		$ (6,063)	$ (7,172)	$ (6,063)	$ (7,172)
[1]	See Note 17 to the Consolidated Financial Statements.

RETIREMENT BENEFITS - Assumptio

RETIREMENT BENEFITS - Assumptions Used (Details)	3 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021	Dec. 31, 2020
U.S. | Postretirement Benefit Plans
Plan Assumptions - During the year
Discount rate	2.85%	3.20%
Plan Assumptions - At period end
Discount rate	2.60%		2.85%	2.20%
Non-U.S. plans | Pension Plans | Weighted Average
Plan Assumptions - During the year
Discount rate	4.26%	4.38%
Plan Assumptions - At period end
Discount rate	4.23%		4.26%	3.60%
Non-U.S. plans | Pension Plans | Minimum
Plan Assumptions - During the year
Discount rate	0.25%	0.45%
Plan Assumptions - At period end
Discount rate	0.25%		0.25%	0.05%
Non-U.S. plans | Pension Plans | Maximum
Plan Assumptions - During the year
Discount rate	9.30%	9.45%
Plan Assumptions - At period end
Discount rate	9.25%		9.30%	8.15%
Non-U.S. plans | Postretirement Benefit Plans
Plan Assumptions - During the year
Discount rate	9.70%	9.75%
Plan Assumptions - At period end
Discount rate	9.50%		9.70%	8.55%
Qualified plans | U.S. | Pension Plans
Plan Assumptions - During the year
Discount rate	3.10%	3.20%
Plan Assumptions - At period end
Discount rate	2.75%		3.10%	2.45%
Nonqualified plans | U.S. | Pension Plans
Plan Assumptions - During the year
Discount rate	3.00%	3.25%
Plan Assumptions - At period end
Discount rate	2.70%		3.00%	2.35%

RETIREMENT BENEFITS - Sensitivi

RETIREMENT BENEFITS - Sensitivities of Certain Key Assumptions (Details) $ in Millions	3 Months Ended
	Jun. 30, 2021USD ($)
U.S. | Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Effect of one-percentage-point increase in discount rates	$ 8
Effect of one-percentage-point decrease in discount rates	(11)
U.S. | Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Effect of one-percentage-point increase in discount rates	0
Effect of one-percentage-point decrease in discount rates	0
Non-U.S. plans | Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Effect of one-percentage-point increase in discount rates	0
Effect of one-percentage-point decrease in discount rates	5
Non-U.S. plans | Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Effect of one-percentage-point increase in discount rates	(2)
Effect of one-percentage-point decrease in discount rates	$ 2

RETIREMENT BENEFITS - Contribut

RETIREMENT BENEFITS - Contributions (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
U.S. | Pension Plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Company contributions	$ 27	$ 28
Company contributions expected to be made during the remainder of the year	32	28
U.S. | Postretirement Benefit Plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Company contributions	9	0
Company contributions expected to be made during the remainder of the year	3
Company reimbursements expected to be received during the remainder of the year		(15)
Non-U.S. plans | Pension Plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Company contributions	78	72
Company contributions expected to be made during the remainder of the year	78	86
Non-U.S. plans | Postretirement Benefit Plans
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Company contributions	4	5
Company contributions expected to be made during the remainder of the year	$ 4	$ 4

RETIREMENT BENEFITS - Defined C

RETIREMENT BENEFITS - Defined Contribution Plans and Postemployment Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Postemployment Retirement Benefits
Amortization of unrecognized:
Net actuarial loss	$ 1	$ 1	$ 1	$ 1
Total service-related expense	1	1	1	1
Non-service-related (benefit) expense	(1)	3	4	8
Total net expense	0	4	5	9
U.S. | Postretirement Benefit Plans
Defined Benefit Plan Disclosure
Company's contributions for defined contribution plans	106	101	211	203
Amortization of unrecognized:
Total net expense	(3)	1	(6)	1
Non-U.S. plans | Postretirement Benefit Plans
Defined Benefit Plan Disclosure
Company's contributions for defined contribution plans	91	74	183	150
Amortization of unrecognized:
Total net expense	$ 5	$ 9	$ 13	$ 18

EARNINGS PER SHARE (Details)

EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		3 Months Ended					6 Months Ended
		Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share [Abstract]
Income from continuing operations before attribution of noncontrolling interests				$ 6,193		$ 1,057	$ 14,170	$ 3,605
Noncontrolling interests				10		0	43	(6)
Net income from continuing operations (for EPS purposes)				6,183		1,057	14,127	3,611
Income (loss) from discontinued operations, net of taxes				10		(1)	8	(19)
Citigroup’s net income				6,193		1,056	14,135	3,592
Less: Preferred dividends				253		253	545	544
Net income available to common shareholders				5,940		803	13,590	3,048
Less: Dividends and undistributed earnings allocated to employee restricted and deferred shares with rights to dividends, applicable to basic EPS				41		11	107	32
Net income allocated to common shareholders for basic EPS				$ 5,899		$ 792	$ 13,483	$ 3,016
Weighted-average common shares outstanding applicable to basic EPS (in shares)				2,056,500		2,081,700	2,069,300	2,089,800
Basic earnings per share
Income from continuing operations (in dollars per share)	[1]			$ 2.86		$ 0.38	$ 6.51	$ 1.45
Discontinued operations (in dollars per share)	[1]			0		0	0	(0.01)
Net income (in dollars per share)	[1]			$ 2.87		$ 0.38	$ 6.52	$ 1.44
Add back: Dividends allocated to employee restricted and deferred shares with rights to dividends that are forfeitable				$ 8		$ 0	$ 15	$ 15
Net income allocated to common shareholders to diluted EPS				$ 5,907		$ 792	$ 13,498	$ 3,031
Effect of dilutive securities
Options (in shares)				0		0	0	0
Other employee plans (in shares)				16,500		2,600	15,500	13,200
Adjusted weighted-average common shares outstanding applicable to diluted EPS (in shares)				2,073,000		2,084,300	2,084,800	2,103,000
Diluted earnings per share
Income from continuing operations (in dollars per share)	[1]			$ 2.84		$ 0.38	$ 6.47	$ 1.45
Discontinued operations (in dollars per share)	[1]			0		0	0	(0.01)
Net income (in dollars per share)	[1]			$ 2.85		$ 0.38	$ 6.47	$ 1.44
Preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share
Redemption of preferred stock				$ 2,285			$ 3,785	$ 1,500
Issuance of new preferred stock							$ 2,300	$ 1,500
Preferred stock | Forecast
Antidilutive Securities Excluded from Computation of Earnings Per Share
Preferred dividends declared			$ 266
Distribution of preferred dividends		$ 228
Series S | Preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share
Redemption of preferred stock (in shares)					41,400
Redemption of preferred stock					$ 1,035
Series R | Preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share
Redemption of preferred stock (in shares)				1,035	465,000
Redemption of preferred stock				$ 1,035	$ 465
Series X | Preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share
Stock issued (in shares)					2,300
Issuance of new preferred stock					$ 2,300
Series Q | Preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share
Redemption of preferred stock (in shares)				1,250
Redemption of preferred stock				$ 1,250
[1]	Due to rounding, earnings per share on continuing operations and discontinued operations may not sum to earnings per share on net income.

SECURITIES BORROWED, LOANED A_3

SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS - Securities (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Abstract]
Securities purchased under agreements to resell	$ 209,300	$ 204,655
Deposits paid for securities borrowed	99,755	90,067
Total, net	309,055	294,722
Allowance for credit losses on securities purchased and borrowed	(8)	(10)
Total, net of allowance	309,047	294,712
Securities sold under agreements to repurchase	198,353	181,194
Deposits received for securities loaned	23,464	18,331
Total, net	221,817	199,525
Securities-for-securities lending transactions	$ 3,300	$ 6,800

SECURITIES BORROWED, LOANED A_4

SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS - Offsetting (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Securities purchased under agreements to resell
Gross amounts of recognized assets	$ 303,476	$ 362,025
Gross amounts offset on the Consolidated Balance Sheet	94,176	157,370
Net amounts of assets included on the Consolidated Balance Sheet	209,300	204,655
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	174,835	159,232
Net amounts	34,465	45,423
Deposits paid for securities borrowed
Gross amounts of recognized assets	116,070	96,425
Gross amounts offset on the Consolidated Balance Sheet	16,315	6,358
Net amounts of assets included on the Consolidated Balance Sheet	99,755	90,067
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	18,037	13,474
Net amounts	81,718	76,593
Total
Gross amounts of recognized assets	419,546	458,450
Gross amounts offset on the Consolidated Balance Sheet	110,491	163,728
Net amounts of assets included on the Consolidated Balance Sheet	309,055	294,722
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	192,872	172,706
Net amounts	116,183	122,016
Securities sold under agreements to repurchase
Gross amounts of recognized liabilities	292,529	338,564
Gross amounts offset on the Consolidated Balance Sheet	94,176	157,370
Net amounts of liabilities included on the Consolidated Balance Sheet	198,353	181,194
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	97,308	95,563
Net amounts	101,045	85,631
Deposits received for securities loaned
Gross amounts of recognized liabilities	39,779	24,689
Gross amounts offset on the Consolidated Balance Sheet	16,315	6,358
Net amounts of liabilities included on the Consolidated Balance Sheet	23,464	18,331
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	4,173	7,982
Net amounts	19,291	10,349
Total
Gross amounts of recognized liabilities	332,308	363,253
Gross amounts offset on the Consolidated Balance Sheet	110,491	163,728
Net amounts of liabilities included on the Consolidated Balance Sheet	221,817	199,525
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	101,481	103,545
Net amounts	$ 120,336	$ 95,980

SECURITIES BORROWED, LOANED A_5

SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS - Repurchase Agreements (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	$ 292,529	$ 338,564
Deposits received for securities loaned	39,779	24,689
Total	332,308	363,253
U.S. Treasury and federal agency securities
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	106,277	112,437
Deposits received for securities loaned	0	0
Total	106,277	112,437
State and municipal securities
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	700	664
Deposits received for securities loaned	0	2
Total	700	666
Foreign government securities
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	106,812	130,017
Deposits received for securities loaned	204	194
Total	107,016	130,211
Corporate bonds
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	22,993	20,149
Deposits received for securities loaned	265	78
Total	23,258	20,227
Equity securities
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	26,227	21,497
Deposits received for securities loaned	39,113	24,149
Total	65,340	45,646
Mortgage-backed securities
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	23,699	45,566
Deposits received for securities loaned	0	0
Total	23,699	45,566
Asset-backed securities
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	2,052	3,307
Deposits received for securities loaned	0	0
Total	2,052	3,307
Other
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	3,769	4,927
Deposits received for securities loaned	197	266
Total	3,966	5,193
Open and overnight
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	138,514	160,754
Deposits received for securities loaned	29,519	17,038
Total	168,033	177,792
Up to 30 days
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	75,384	98,226
Deposits received for securities loaned	1,058	3
Total	76,442	98,229
31–90 days
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	31,346	41,679
Deposits received for securities loaned	1,677	2,770
Total	33,023	44,449
Greater than 90 days
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	47,285	37,905
Deposits received for securities loaned	7,525	4,878
Total	$ 54,810	$ 42,783

BROKERAGE RECEIVABLES AND BRO_3

BROKERAGE RECEIVABLES AND BROKERAGE PAYABLES (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Brokers and Dealers [Abstract]
Receivables from customers	$ 26,744	$ 18,097
Receivables from brokers, dealers and clearing organizations	34,394	26,709
Total brokerage receivables	61,138	44,806
Payables to customers	46,413	39,319
Payables to brokers, dealers and clearing organizations	13,003	11,165
Total brokerage payables	$ 59,416	$ 50,484

INVESTMENTS - Overview (Details

INVESTMENTS - Overview (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Investment Holdings
Total investments	$ 487,063		$ 487,063			$ 447,359
Interest and dividends on investments
Taxable interest	1,723	$ 1,984	3,375	$ 4,163
Interest exempt from U.S. federal income tax	57	70	123	146
Dividend income	38	43	72	69
Total interest and dividend income on investments	1,818	2,097	3,570	4,378
Gross realized investments losses, excluding losses from other-than-temporary impairment
Gross realized investment gains	155	775	615	1,237
Gross realized investment losses	(18)	(27)	(77)	(57)
Net realized gains on sales of investments	137	748	538	1,180
Debt securities AFS
Allowance for credit losses	5	$ 8	5	$ 8	$ 5	5	$ 0	$ 0
Fair value	302,977		302,977			335,084
Debt securities available-for-sale (AFS)
Investment Holdings
Total investments	302,977		302,977			335,084
Debt securities held-to-maturity (HTM)
Investment Holdings
Total investments	176,742		176,742			104,943
Marketable equity securities carried at fair value | Fair value
Investment Holdings
Total investments	195		195			515
Non-marketable equity securities | Fair value
Investment Holdings
Total investments	598		598			551
Non-marketable equity securities | Carried at cost
Investment Holdings
Total investments	5,170		5,170			5,304
Non-marketable securities measured using measurement alternative
Investment Holdings
Total investments	1,381		1,381			962
Mortgage-backed securities - U.S. government-sponsored agency guaranteed
Debt securities AFS
Amortized cost	38,842		38,842			42,836
Gross unrealized gains	697		697			1,134
Gross unrealized losses	229		229			52
Allowance for credit losses	0		0			0
Fair value	39,310		39,310			43,918
Mortgage-backed securities - Non-U.S. residential
Debt securities AFS
Amortized cost	403		403			568
Gross unrealized gains	1		1			3
Gross unrealized losses	0		0			0
Allowance for credit losses	0		0			0
Fair value	404		404			571
Commercial
Debt securities AFS
Amortized cost	43		43			49
Gross unrealized gains	0		0			1
Gross unrealized losses	0		0			0
Allowance for credit losses	0		0			0
Fair value	43		43			50
Mortgage-backed securities
Debt securities AFS
Amortized cost	39,288		39,288			43,453
Gross unrealized gains	698		698			1,138
Gross unrealized losses	229		229			52
Allowance for credit losses	0		0			0
Fair value	39,757		39,757			44,539
U.S. Treasury
Debt securities AFS
Amortized cost	125,224		125,224			144,094
Gross unrealized gains	1,336		1,336			2,108
Gross unrealized losses	413		413			49
Allowance for credit losses	0		0			0
Fair value	126,147		126,147			146,153
Agency obligations
Debt securities AFS
Amortized cost	0		0			50
Gross unrealized gains	0		0			1
Gross unrealized losses	0		0			0
Allowance for credit losses	0		0			0
Fair value	0		0			51
U.S. Treasury and federal agency securities
Debt securities AFS
Amortized cost	125,224		125,224			144,144
Gross unrealized gains	1,336		1,336			2,109
Gross unrealized losses	413		413			49
Allowance for credit losses	0		0			0
Fair value	126,147		126,147			146,204
State and municipal
Debt securities AFS
Amortized cost	3,096		3,096			3,753
Gross unrealized gains	95		95			123
Gross unrealized losses	112		112			157
Allowance for credit losses	0		0			0
Fair value	3,079		3,079			3,719
Foreign government
Debt securities AFS
Amortized cost	120,122		120,122			123,467
Gross unrealized gains	587		587			1,623
Gross unrealized losses	492		492			122
Allowance for credit losses	0		0			0
Fair value	120,217		120,217			124,968
Corporate
Debt securities AFS
Amortized cost	7,902		7,902			10,444
Gross unrealized gains	74		74			152
Gross unrealized losses	68		68			91
Allowance for credit losses	5		5			5
Fair value	7,903		7,903			10,500
Asset-backed securities
Debt securities AFS
Amortized cost	211		211			277
Gross unrealized gains	0		0			5
Gross unrealized losses	0		0			4
Allowance for credit losses	0		0			0
Fair value	211		211			278
Other debt securities
Debt securities AFS
Amortized cost	5,661		5,661			4,871
Gross unrealized gains	2		2			5
Gross unrealized losses	0		0			0
Allowance for credit losses	0		0			0
Fair value	5,663		5,663			4,876
Debt securities AFS
Debt securities AFS
Amortized cost	301,504		301,504			330,409
Gross unrealized gains	2,792		2,792			5,155
Gross unrealized losses	1,314		1,314			475
Allowance for credit losses	5		5			5
Fair value	$ 302,977		$ 302,977			$ 335,084

INVESTMENTS - Fair Value of AFS

INVESTMENTS - Fair Value of AFS Securities (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Debt securities AFS
Less than 12 months	$ 114,730	$ 60,316
12 months or longer	7,979	4,760
Total	122,709	65,076
Gross unrealized losses
Less than 12 months	1,053	267
12 months or longer	261	208
Total	1,314	475
Mortgage-backed securities - U.S. government-sponsored agency guaranteed
Debt securities AFS
Less than 12 months	14,217	3,588
12 months or longer	343	298
Total	14,560	3,886
Gross unrealized losses
Less than 12 months	208	30
12 months or longer	21	22
Total	229	52
Mortgage-backed securities - Non-U.S. residential
Debt securities AFS
Less than 12 months	22	1
12 months or longer	0	0
Total	22	1
Gross unrealized losses
Less than 12 months	0	0
12 months or longer	0	0
Total	0	0
Commercial
Debt securities AFS
Less than 12 months		7
12 months or longer		4
Total		11
Gross unrealized losses
Less than 12 months		0
12 months or longer		0
Total		0
Mortgage-backed securities
Debt securities AFS
Less than 12 months	14,239	3,596
12 months or longer	343	302
Total	14,582	3,898
Gross unrealized losses
Less than 12 months	208	30
12 months or longer	21	22
Total	229	52
U.S. Treasury
Debt securities AFS
Less than 12 months	52,548	25,031
12 months or longer	0	0
Total	52,548	25,031
Gross unrealized losses
Less than 12 months	413	49
12 months or longer	0	0
Total	413	49
Agency obligations
Debt securities AFS
Less than 12 months		50
12 months or longer		0
Total		50
Gross unrealized losses
Less than 12 months		0
12 months or longer		0
Total		0
U.S. Treasury and federal agency securities
Debt securities AFS
Less than 12 months		25,081
12 months or longer		0
Total		25,081
Gross unrealized losses
Less than 12 months		49
12 months or longer		0
Total		49
State and municipal
Debt securities AFS
Less than 12 months	101	836
12 months or longer	1,107	893
Total	1,208	1,729
Gross unrealized losses
Less than 12 months	2	34
12 months or longer	110	123
Total	112
Foreign government
Debt securities AFS
Less than 12 months	43,680	29,344
12 months or longer	6,510	3,502
Total	50,190	32,846
Gross unrealized losses
Less than 12 months	363	61
12 months or longer	129	61
Total	492	122
Corporate
Debt securities AFS
Less than 12 months	1,896	1,083
12 months or longer	19	24
Total	1,915	1,107
Gross unrealized losses
Less than 12 months	67	90
12 months or longer	1	1
Total	68	91
Asset-backed securities
Debt securities AFS
Less than 12 months	3	194
12 months or longer	0	39
Total	3	233
Gross unrealized losses
Less than 12 months	0	3
12 months or longer	0	1
Total	0	4
Other debt securities
Debt securities AFS
Less than 12 months	2,263	182
12 months or longer	0	0
Total	2,263	182
Gross unrealized losses
Less than 12 months	0	0
12 months or longer	0	0
Total	$ 0	$ 0

INVESTMENTS - Fair Value of A_2

INVESTMENTS - Fair Value of AFS Debt Securities by Contractual Maturity Date (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Fair value
Total fair value	$ 302,977	$ 335,084
Mortgage-backed securities
Amoritzed cost
Amortized cost, due within 1 year	107	27
Amortized cost, after 1 but within 5 years	315	567
Amortized cost, after 5 but within 10 years	679	688
Amortized cost, after 10 years	38,187	42,171
Amortized cost	39,288	43,453
Fair value
Fair value, due within 1 year	107	27
Fair value, after 1 but within 5 years	317	571
Fair value, after 5 but within 10 years	732	757
Fair value, after 10 years	38,601	43,184
Total fair value	39,757	44,539
U.S. Treasury and federal agency securities
Amoritzed cost
Amortized cost, due within 1 year	30,179	34,834
Amortized cost, after 1 but within 5 years	93,736	108,160
Amortized cost, after 5 but within 10 years	1,309	1,150
Amortized cost, after 10 years	0	0
Amortized cost	125,224	144,144
Fair value
Fair value, due within 1 year	30,264	34,951
Fair value, after 1 but within 5 years	94,589	110,091
Fair value, after 5 but within 10 years	1,294	1,162
Fair value, after 10 years	0	0
Total fair value	126,147	146,204
State and municipal
Amoritzed cost
Amortized cost, due within 1 year	379	427
Amortized cost, after 1 but within 5 years	92	189
Amortized cost, after 5 but within 10 years	245	276
Amortized cost, after 10 years	2,380	2,861
Amortized cost	3,096	3,753
Fair value
Fair value, due within 1 year	379	428
Fair value, after 1 but within 5 years	94	198
Fair value, after 5 but within 10 years	250	267
Fair value, after 10 years	2,356	2,826
Total fair value	3,079	3,719
Foreign government
Amoritzed cost
Amortized cost, due within 1 year	48,404	48,133
Amortized cost, after 1 but within 5 years	64,721	67,365
Amortized cost, after 5 but within 10 years	4,900	5,908
Amortized cost, after 10 years	2,097	2,061
Amortized cost	120,122	123,467
Fair value
Fair value, due within 1 year	48,458	48,258
Fair value, after 1 but within 5 years	64,846	68,586
Fair value, after 5 but within 10 years	4,803	6,011
Fair value, after 10 years	2,110	2,113
Total fair value	120,217	124,968
All other
Amoritzed cost
Amortized cost, due within 1 year	6,436	6,661
Amortized cost, after 1 but within 5 years	6,200	7,814
Amortized cost, after 5 but within 10 years	1,078	1,018
Amortized cost, after 10 years	60	99
Amortized cost	13,774	15,592
Fair value
Fair value, due within 1 year	6,435	6,665
Fair value, after 1 but within 5 years	6,234	7,891
Fair value, after 5 but within 10 years	1,080	1,034
Fair value, after 10 years	28	64
Total fair value	$ 13,777	$ 15,654

INVESTMENTS - Debt Securities H

INVESTMENTS - Debt Securities Held-to-Maturity (Details) - USD ($) $ in Millions	1 Months Ended
	Feb. 28, 2021	Aug. 31, 2020	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Debt Securities Held-to-maturity
Amortized cost, net			$ 176,742		$ 104,943
Gross unrealized gains			2,340		3,022
Gross unrealized losses			980		175
Fair value			178,102		107,790
Allowance for credit losses on HTM debt securities			83	$ 78	86	$ 107	$ 76	$ 0
Mortgage-backed securities - U.S. government-sponsored agency guaranteed
Debt Securities Held-to-maturity
Amortized cost, net			65,387		49,004
Gross unrealized gains			1,525		2,162
Gross unrealized losses			472		15
Fair value			66,440		51,151
Mortgage-backed securities - Non-U.S. residential
Debt Securities Held-to-maturity
Amortized cost, net			757		1,124
Gross unrealized gains			1		3
Gross unrealized losses			0		1
Fair value			758		1,126
Commercial
Debt Securities Held-to-maturity
Amortized cost, net			891		825
Gross unrealized gains			2		1
Gross unrealized losses			2		1
Fair value			891		825
Mortgage-backed securities
Debt Securities Held-to-maturity
Amortized cost, net			67,035		50,953
Gross unrealized gains			1,528		2,166
Gross unrealized losses			474		17
Fair value			68,089		53,102
U.S. treasury securities
Debt Securities Held-to-maturity
Amortized cost, net			72,342		21,293
Gross unrealized gains			120		4
Gross unrealized losses			452		55
Fair value			72,010		21,242
Fair value of securities transferred from AFS to HTM		$ 13,100
Securities transferred from AFS to HTM, unrealized gain position		$ 144
State and municipal
Debt Securities Held-to-maturity
Amortized cost, net			9,030		9,185
Gross unrealized gains			655		755
Gross unrealized losses			9		11
Fair value			9,676		9,929
Fair value of securities transferred from AFS to HTM	$ 237
Securities transferred from AFS to HTM, unrealized gain position	$ 14
Foreign government
Debt Securities Held-to-maturity
Amortized cost, net			1,755		1,931
Gross unrealized gains			25		91
Gross unrealized losses			14		0
Fair value			1,766		2,022
Asset-backed securities
Debt Securities Held-to-maturity
Amortized cost, net			26,580		21,581
Gross unrealized gains			12		6
Gross unrealized losses			31		92
Fair value			$ 26,561		$ 21,495

INVESTMENTS - Carrying Value an

INVESTMENTS - Carrying Value and Fair Value of HTM Debt Securities by Contractual Maturity Dates (Details) - USD ($) $ in Millions	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount;
Amortized cost	$ 176,742		$ 104,943
Held-to-maturity Securities, Debt Maturities, Fair Value;
Fair value	178,102		107,790
Allowance for credit losses on HTM debt securities	83	$ 78	86	$ 107	$ 76	$ 0
Mortgage-backed securities
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount;
Due within 1 year, amortized cost	307		81
After 1 but within 5 years, amortized cost	855		463
After 5 but within 10 years, amortized cost	1,571		1,699
After 10 years, amortized cost	64,302		48,710
Amortized cost	67,035		50,953
Held-to-maturity Securities, Debt Maturities, Fair Value;
Due within 1 year, fair value	304		81
After 1 but within 5 years, fair value	919		477
After 5 but within 10 years, fair value	1,676		1,873
After 10 years, fair value	65,190		50,671
Fair value	68,089		53,102
U.S. treasury securities
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount;
Due within 1 year, amortized cost	0		0
After 1 but within 5 years, amortized cost	32,125		18,955
After 5 but within 10 years, amortized cost	40,217		2,338
After 10 years, amortized cost	0		0
Amortized cost	72,342		21,293
Held-to-maturity Securities, Debt Maturities, Fair Value;
Due within 1 year, fair value	0		0
After 1 but within 5 years, fair value	31,742		19,127
After 5 but within 10 years, fair value	40,268		2,115
After 10 years, fair value	0		0
Fair value	72,010		21,242
State and municipal
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount;
Due within 1 year, amortized cost	11		6
After 1 but within 5 years, amortized cost	193		139
After 5 but within 10 years, amortized cost	742		818
After 10 years, amortized cost	8,084		8,222
Amortized cost	9,030		9,185
Held-to-maturity Securities, Debt Maturities, Fair Value;
Due within 1 year, fair value	11		6
After 1 but within 5 years, fair value	197		142
After 5 but within 10 years, fair value	785		869
After 10 years, fair value	8,683		8,912
Fair value	9,676		9,929
Foreign government
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount;
Due within 1 year, amortized cost	344		361
After 1 but within 5 years, amortized cost	1,411		1,570
After 5 but within 10 years, amortized cost	0		0
After 10 years, amortized cost	0		0
Amortized cost	1,755		1,931
Held-to-maturity Securities, Debt Maturities, Fair Value;
Due within 1 year, fair value	347		360
After 1 but within 5 years, fair value	1,419		1,662
After 5 but within 10 years, fair value	0		0
After 10 years, fair value	0		0
Fair value	1,766		2,022
All other
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount;
Due within 1 year, amortized cost	0		0
After 1 but within 5 years, amortized cost	0		0
After 5 but within 10 years, amortized cost	10,452		11,795
After 10 years, amortized cost	16,128		9,786
Amortized cost	26,580		21,581
Held-to-maturity Securities, Debt Maturities, Fair Value;
Due within 1 year, fair value	0		0
After 1 but within 5 years, fair value	0		0
After 5 but within 10 years, fair value	10,449		15,020
After 10 years, fair value	16,112		6,475
Fair value	$ 26,561		$ 21,495

INVESTMENTS - Recognition and M

INVESTMENTS - Recognition and Measurement of Impairment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
OTTI on Investments disclosures
Total impairment losses recognized during the period	$ 0	$ 0	$ 0	$ 0
Less: portion of impairment loss recognized in AOCI (before taxes)	0	0	0	0
Net impairment losses recognized in earnings for debt securities that the Company does not intend to sell nor will likely be required to sell	0	0	0	0
Impairment losses recognized in earnings for debt securities that the Company intends to sell, would more-likely-than-not be required to sell or will be subject to an issuer call deemed probable of exercise	9	19	78	71
Total impairment losses recognized in earnings	9	19	78	71
Debt securities available-for-sale (AFS)
OTTI on Investments disclosures
Total impairment losses recognized during the period	0	0	0	0
Less: portion of impairment loss recognized in AOCI (before taxes)	0	0	0	0
Net impairment losses recognized in earnings for debt securities that the Company does not intend to sell nor will likely be required to sell	0	0	0	0
Impairment losses recognized in earnings for debt securities that the Company intends to sell, would more-likely-than-not be required to sell or will be subject to an issuer call deemed probable of exercise	9	19	78	71
Total impairment losses recognized in earnings	9	19	78	71
Other assets
OTTI on Investments disclosures
Total impairment losses recognized during the period	0	0	0	0
Less: portion of impairment loss recognized in AOCI (before taxes)	0	0	0	0
Net impairment losses recognized in earnings for debt securities that the Company does not intend to sell nor will likely be required to sell	0	0	0	0
Impairment losses recognized in earnings for debt securities that the Company intends to sell, would more-likely-than-not be required to sell or will be subject to an issuer call deemed probable of exercise	0	0	0	0
Total impairment losses recognized in earnings	$ 0	$ 0	$ 0	$ 0

INVESTMENTS - Schedule of Allow

INVESTMENTS - Schedule of Allowance for Credit Losses for AFS Debt Securities (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period		$ 5	$ 0	$ 5	$ 0
Less: Write-offs		0	0	0	0
Recoveries of amounts written-off		0	0	0	0
Net credit losses (NCLs)		0	0	0	0
Credit losses on securities without previous credit losses		0	8	0	8
Net reserve builds (releases) on securities with previous credit losses		0	0	0	0
Total provision for credit losses	[1]	0	8	0	8
Initial allowance on newly purchased credit-deteriorated securities during the period		0	0	0	0
Allowance for credit losses at end of period		5	8	5	8
Mortgage-backed securities
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period		0	0	0	0
Less: Write-offs		0	0	0	0
Recoveries of amounts written-off		0	0	0	0
Net credit losses (NCLs)		0	0	0	0
Credit losses on securities without previous credit losses		0	0	0	0
Net reserve builds (releases) on securities with previous credit losses		0	0	0	0
Total provision for credit losses		0	0	0	0
Initial allowance on newly purchased credit-deteriorated securities during the period		0	0	0	0
Allowance for credit losses at end of period		0	0	0	0
U.S. Treasury and federal agency securities
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period		0	0	0	0
Less: Write-offs		0	0	0	0
Recoveries of amounts written-off		0	0	0	0
Net credit losses (NCLs)		0	0	0	0
Credit losses on securities without previous credit losses		0	0	0	0
Net reserve builds (releases) on securities with previous credit losses		0	0	0	0
Total provision for credit losses		0	0	0	0
Initial allowance on newly purchased credit-deteriorated securities during the period		0	0	0	0
Allowance for credit losses at end of period		0	0	0	0
State and municipal securities
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period		0	0	0	0
Less: Write-offs		0	0	0	0
Recoveries of amounts written-off		0	0	0	0
Net credit losses (NCLs)		0	0	0	0
Credit losses on securities without previous credit losses		0	0	0	0
Net reserve builds (releases) on securities with previous credit losses		0	0	0	0
Total provision for credit losses		0	0	0	0
Initial allowance on newly purchased credit-deteriorated securities during the period		0	0	0	0
Allowance for credit losses at end of period		0	0	0	0
Foreign government
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period		0	0	0	0
Less: Write-offs		0	0	0	0
Recoveries of amounts written-off		0	0	0	0
Net credit losses (NCLs)		0	0	0	0
Credit losses on securities without previous credit losses		0	3	0	3
Net reserve builds (releases) on securities with previous credit losses		0	0	0	0
Total provision for credit losses		0	3	0	3
Initial allowance on newly purchased credit-deteriorated securities during the period		0	0	0	0
Allowance for credit losses at end of period		0	3	0	3
Corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period		5	0	5	0
Less: Write-offs		0	0	0	0
Recoveries of amounts written-off		0	0	0	0
Net credit losses (NCLs)		0	0	0	0
Credit losses on securities without previous credit losses		0	5	0	5
Net reserve builds (releases) on securities with previous credit losses		0	0	0	0
Total provision for credit losses		0	5	0	5
Initial allowance on newly purchased credit-deteriorated securities during the period		0	0	0	0
Allowance for credit losses at end of period		$ 5	$ 5	$ 5	$ 5
[1]	In accordance with ASC 326.

INVESTMENTS - Carrying Value of

INVESTMENTS - Carrying Value of Non-marketable Equity Securities Measured Using the Measurement Alternative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Equity Securities without Readily Determinable Fair Value, Annual Amount [Abstract]
Measurement alternative—carrying value	$ 1,381		$ 1,381		$ 962
Measurement alternative—impairment losses	4	$ 50	4	$ 53
Measurement alternative—downward changes for observable prices	0	19	0	19
Measurement alternative—upward changes for observable prices	215	17	296	42
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Cumulative Amount [Abstract]
Measurement alternative—impairment losses	73		73
Measurement alternative—downward changes for observable prices	53		53
Measurement alternative—upward changes for observable prices	783		783
Non-marketable equity securities, impairment loss recognized in earnings	$ 0	$ 0	$ 0	$ 0

INVESTMENTS - Alternative Inves

INVESTMENTS - Alternative Investment Funds (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Investments in Alternative Investment Funds
Alternative investment funds, unfunded commitments	$ 63	$ 82
Private equity funds
Investments in Alternative Investment Funds
Alternative investment funds, unfunded commitments	60	62
Real estate funds
Investments in Alternative Investment Funds
Alternative investment funds, unfunded commitments	3	20
Mutual/collective investment funds
Investments in Alternative Investment Funds
Alternative investment funds, unfunded commitments	0	0
Fair value
Investments in Alternative Investment Funds
Non-marketable equity securities measured using the measurement alternative	147	152
Fair value | Private equity funds
Investments in Alternative Investment Funds
Non-marketable equity securities measured using the measurement alternative	124	123
Fair value | Real estate funds
Investments in Alternative Investment Funds
Non-marketable equity securities measured using the measurement alternative	2	9
Fair value | Mutual/collective investment funds
Investments in Alternative Investment Funds
Non-marketable equity securities measured using the measurement alternative	$ 21	$ 20

LOANS - Consumer Loans, Delinqu

LOANS - Consumer Loans, Delinquencies and Non-Accrual Details (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)category	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)category	Jun. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Financing Receivable, Past Due [Line Items]
Number of loan categories | category	2		2
Total loans	$ 676,834		$ 676,834		$ 675,883
Loans held at fair value	7,707		7,707		6,854
Consumer
Financing Receivable, Past Due [Line Items]
Total loans	275,895		275,895		288,839
Non-accrual loans for which there is no ACLL	201		201		210
Non-accrual loans for which there is an ACLL	1,605		1,605		1,931
Total non-accrual	1,806		1,806		2,141
90 days  past due and accruing	1,409		1,409		2,038
Loans held at fair value	14		14		14
Unearned income	676		676		749
Loans sold and/or reclassified to held-for-sale	95	$ 12	191	$ 36
Consumer | Current
Financing Receivable, Past Due [Line Items]
Total loans	271,572		271,572		282,799
Consumer | Past Due | Government-guaranteed
Financing Receivable, Past Due [Line Items]
Total loans	402		402		524
Consumer | 30 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	1,872		1,872		2,696
Consumer | 90 days or more past due
Financing Receivable, Past Due [Line Items]
Total loans	2,049		2,049		2,820
Consumer | In North America offices
Financing Receivable, Past Due [Line Items]
Total loans	179,502		179,502		189,800
Non-accrual loans for which there is no ACLL	201		201		210
Non-accrual loans for which there is an ACLL	678		678		849
Total non-accrual	879		879		1,059
90 days  past due and accruing	1,177		1,177		1,662
Consumer | In North America offices | Current
Financing Receivable, Past Due [Line Items]
Total loans	176,536		176,536		185,599
Consumer | In North America offices | Past Due | Government-guaranteed
Financing Receivable, Past Due [Line Items]
Total loans	402		402		524
Consumer | In North America offices | 30 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	1,149		1,149		1,735
Consumer | In North America offices | 90 days or more past due
Financing Receivable, Past Due [Line Items]
Total loans	1,415		1,415		1,942
Consumer | In offices outside North America
Financing Receivable, Past Due [Line Items]
Total loans	96,393		96,393		99,039
Non-accrual loans for which there is no ACLL	0		0		0
Non-accrual loans for which there is an ACLL	927		927		1,082
Total non-accrual	927		927		1,082
90 days  past due and accruing	232		232		376
Consumer | In offices outside North America | Current
Financing Receivable, Past Due [Line Items]
Total loans	95,036		95,036		97,200
Consumer | In offices outside North America | Past Due | Government-guaranteed
Financing Receivable, Past Due [Line Items]
Total loans	0		0		0
Consumer | In offices outside North America | 30 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	723		723		961
Consumer | In offices outside North America | 90 days or more past due
Financing Receivable, Past Due [Line Items]
Total loans	634		634		878
Consumer | Residential first mortgages
Financing Receivable, Past Due [Line Items]
Total loans	44,835		44,835		47,778
Loans held at fair value	14		14		14
Consumer | Residential first mortgages | In North America offices
Financing Receivable, Past Due [Line Items]
Total loans	44,835		44,835		47,778
Non-accrual loans for which there is no ACLL	133		133		136
Non-accrual loans for which there is an ACLL	407		407		509
Total non-accrual	540		540		645
90 days  past due and accruing	257		257		332
Mortgage loans in process of foreclosure	100		100		100
Consumer | Residential first mortgages | In North America offices | Current
Financing Receivable, Past Due [Line Items]
Total loans	43,811		43,811		46,471
Consumer | Residential first mortgages | In North America offices | Past Due | Government-guaranteed
Financing Receivable, Past Due [Line Items]
Total loans	402		402		524
Consumer | Residential first mortgages | In North America offices | 30 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	315		315		402
Consumer | Residential first mortgages | In North America offices | 30 to 89 Days Past Due | Government-guaranteed
Financing Receivable, Past Due [Line Items]
Total loans	100		100		200
Consumer | Residential first mortgages | In North America offices | 90 days or more past due
Financing Receivable, Past Due [Line Items]
Total loans	307		307		381
Consumer | Residential first mortgages | In North America offices | 90 days or more past due | Government-guaranteed
Financing Receivable, Past Due [Line Items]
Total loans	300		300		300
Consumer | Residential first mortgages | In offices outside North America
Financing Receivable, Past Due [Line Items]
Total loans	40,344		40,344		39,969
Non-accrual loans for which there is no ACLL	0		0		0
Non-accrual loans for which there is an ACLL	476		476		486
Total non-accrual	476		476		486
90 days  past due and accruing	0		0		0
Consumer | Residential first mortgages | In offices outside North America | Current
Financing Receivable, Past Due [Line Items]
Total loans	39,964		39,964		39,557
Consumer | Residential first mortgages | In offices outside North America | Past Due | Government-guaranteed
Financing Receivable, Past Due [Line Items]
Total loans	0		0		0
Consumer | Residential first mortgages | In offices outside North America | 30 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	184		184		213
Consumer | Residential first mortgages | In offices outside North America | 90 days or more past due
Financing Receivable, Past Due [Line Items]
Total loans	196		196		199
Consumer | Home equity loans
Financing Receivable, Past Due [Line Items]
Total loans	6,168		6,168		7,128
Consumer | Home equity loans | In North America offices
Financing Receivable, Past Due [Line Items]
Total loans	6,168		6,168		7,128
Non-accrual loans for which there is no ACLL	68		68		72
Non-accrual loans for which there is an ACLL	253		253		307
Total non-accrual	321		321		379
90 days  past due and accruing	0		0		0
Home equity loans in process of foreclosure	100		100		100
Consumer | Home equity loans | In North America offices | Current
Financing Receivable, Past Due [Line Items]
Total loans	5,937		5,937		6,829
Consumer | Home equity loans | In North America offices | Past Due | Government-guaranteed
Financing Receivable, Past Due [Line Items]
Total loans	0		0		0
Consumer | Home equity loans | In North America offices | 30 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	51		51		78
Consumer | Home equity loans | In North America offices | 90 days or more past due
Financing Receivable, Past Due [Line Items]
Total loans	180		180		221
Consumer | Credit cards
Financing Receivable, Past Due [Line Items]
Total loans	124,295		124,295		129,813
Consumer | Credit cards | In North America offices
Financing Receivable, Past Due [Line Items]
Total loans	124,823		124,823		130,385
Non-accrual loans for which there is no ACLL	0		0		0
Non-accrual loans for which there is an ACLL	0		0		0
Total non-accrual	0		0		0
90 days  past due and accruing	920		920		1,330
Consumer | Credit cards | In North America offices | Current
Financing Receivable, Past Due [Line Items]
Total loans	123,133		123,133		127,827
Consumer | Credit cards | In North America offices | Past Due | Government-guaranteed
Financing Receivable, Past Due [Line Items]
Total loans	0		0		0
Consumer | Credit cards | In North America offices | 30 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	770		770		1,228
Consumer | Credit cards | In North America offices | 90 days or more past due
Financing Receivable, Past Due [Line Items]
Total loans	920		920		1,330
Consumer | Credit cards | In offices outside North America
Financing Receivable, Past Due [Line Items]
Total loans	20,776		20,776		22,692
Non-accrual loans for which there is no ACLL	0		0		0
Non-accrual loans for which there is an ACLL	233		233		384
Total non-accrual	233		233		384
90 days  past due and accruing	232		232		376
Consumer | Credit cards | In offices outside North America | Current
Financing Receivable, Past Due [Line Items]
Total loans	20,162		20,162		21,718
Consumer | Credit cards | In offices outside North America | Past Due | Government-guaranteed
Financing Receivable, Past Due [Line Items]
Total loans	0		0		0
Consumer | Credit cards | In offices outside North America | 30 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	304		304		429
Consumer | Credit cards | In offices outside North America | 90 days or more past due
Financing Receivable, Past Due [Line Items]
Total loans	310		310		545
Consumer | Personal, small business and other
Financing Receivable, Past Due [Line Items]
Total loans	3,676		3,676		4,509
Consumer | Personal, small business and other | In North America offices
Financing Receivable, Past Due [Line Items]
Total loans	3,676		3,676		4,509
Non-accrual loans for which there is no ACLL	0		0		2
Non-accrual loans for which there is an ACLL	18		18		33
Total non-accrual	18		18		35
90 days  past due and accruing	0		0		0
Consumer | Personal, small business and other | In North America offices | Current
Financing Receivable, Past Due [Line Items]
Total loans	3,655		3,655		4,472
Consumer | Personal, small business and other | In North America offices | Past Due | Government-guaranteed
Financing Receivable, Past Due [Line Items]
Total loans	0		0		0
Consumer | Personal, small business and other | In North America offices | 30 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	13		13		27
Consumer | Personal, small business and other | In North America offices | 90 days or more past due
Financing Receivable, Past Due [Line Items]
Total loans	8		8		10
Consumer | Personal, small business and other | In offices outside North America
Financing Receivable, Past Due [Line Items]
Total loans	35,273		35,273		36,378
Non-accrual loans for which there is no ACLL	0		0		0
Non-accrual loans for which there is an ACLL	218		218		212
Total non-accrual	218		218		212
90 days  past due and accruing	0		0		0
Consumer | Personal, small business and other | In offices outside North America | Current
Financing Receivable, Past Due [Line Items]
Total loans	34,910		34,910		35,925
Consumer | Personal, small business and other | In offices outside North America | Past Due | Government-guaranteed
Financing Receivable, Past Due [Line Items]
Total loans	0		0		0
Consumer | Personal, small business and other | In offices outside North America | 30 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	235		235		319
Consumer | Personal, small business and other | In offices outside North America | 90 days or more past due
Financing Receivable, Past Due [Line Items]
Total loans	$ 128		$ 128		$ 134

LOANS - Schedule of Interest In

LOANS - Schedule of Interest Income Recognized for Non-Accrual Consumer Loans (Details) - Consumer - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Financing Receivable, Nonaccrual [Line Items]
Interest income	$ 5	$ 6	$ 10	$ 11
In North America offices
Financing Receivable, Nonaccrual [Line Items]
Interest income	5	6	10	11
In offices outside North America
Financing Receivable, Nonaccrual [Line Items]
Interest income	0	0	0	0
Residential first mortgages | In North America offices
Financing Receivable, Nonaccrual [Line Items]
Interest income	3	4	6	7
Residential first mortgages | In offices outside North America
Financing Receivable, Nonaccrual [Line Items]
Interest income	0	0	0	0
Home equity loans | In North America offices
Financing Receivable, Nonaccrual [Line Items]
Interest income	2	2	4	4
Credit cards | In North America offices
Financing Receivable, Nonaccrual [Line Items]
Interest income	0	0	0	0
Credit cards | In offices outside North America
Financing Receivable, Nonaccrual [Line Items]
Interest income	0	0	0	0
Personal, small business and other | In North America offices
Financing Receivable, Nonaccrual [Line Items]
Interest income	0	0	0	0
Personal, small business and other | In offices outside North America
Financing Receivable, Nonaccrual [Line Items]
Interest income	$ 0	$ 0	$ 0	$ 0

LOANS - Credit Quality Indicato

LOANS - Credit Quality Indicators (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	$ 676,834	$ 675,883
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	275,895	288,839
Consumer | Residential first mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	44,835	47,778
Consumer | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	124,295	129,813
Consumer | Home equity loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	6,168	7,128
Consumer | Personal, small business and other
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	3,676	4,509
Consumer | Less than or equal to 80%
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	47,429	49,851
Consumer | Less than or equal to 80% | Residential first mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	4,698	11,447
One year prior to current fiscal year	11,573	7,029
Two years prior to current fiscal year	5,513	1,617
Three years prior to current fiscal year	1,398	2,711
Four years prior to current fiscal year	2,232	5,423
Prior	16,129	14,966
Total loans, net of unearned income	41,543	43,193
Consumer | Less than or equal to 80% | Home equity loans (pre-reset)
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	2,562	2,876
Consumer | Less than or equal to 80% | Home equity loans (post-reset)
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	3,324	3,782
Consumer | Less than or equal to 80% | Home equity loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	5,886	6,658
Consumer | 80% but less than or equal to 100%
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	1,747	3,185
Consumer | 80% but less than or equal to 100% | Residential first mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	454	1,543
One year prior to current fiscal year	430	376
Two years prior to current fiscal year	211	507
Three years prior to current fiscal year	262	269
Four years prior to current fiscal year	130	84
Prior	73	66
Total loans, net of unearned income	1,560	2,845
Consumer | 80% but less than or equal to 100% | Home equity loans (pre-reset)
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	42	50
Consumer | 80% but less than or equal to 100% | Home equity loans (post-reset)
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	145	290
Consumer | 80% but less than or equal to 100% | Home equity loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	187	340
Consumer | Greater than 100%
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	75	109
Consumer | Greater than 100% | Residential first mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	2
Two years prior to current fiscal year	3	11
Three years prior to current fiscal year	7	4
Four years prior to current fiscal year	3	2
Prior	13	16
Total loans, net of unearned income	26	35
Consumer | Greater than 100% | Home equity loans (pre-reset)
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	14	16
Consumer | Greater than 100% | Home equity loans (post-reset)
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	35	58
Consumer | Greater than 100% | Home equity loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	49	74
Consumer | LTV not available
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	1,752	1,761
Consumer | LTV not available | Residential first mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	1,706	1,705
Consumer | LTV not available | Home equity loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	46	56
Consumer | Total
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	51,003	54,906
Consumer | Less than 680
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	24,923	30,920
Consumer | Less than 680 | Residential first mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	40	187
One year prior to current fiscal year	213	150
Two years prior to current fiscal year	127	246
Three years prior to current fiscal year	208	298
Four years prior to current fiscal year	257	323
Prior	1,707	1,708
Total loans, net of unearned income	2,552	2,912
Consumer | Less than 680 | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	21,014	26,227
Consumer | Less than 680 | Credit cards | CANADA
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	528	572
Consumer | Less than 680 | Home equity loans (pre-reset)
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	237	292
Consumer | Less than 680 | Home equity loans (post-reset)
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	846	1,055
Consumer | Less than 680 | Home equity loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	1,083	1,347
Consumer | Less than 680 | Personal, small business and other
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	8	23
One year prior to current fiscal year	24	79
Two years prior to current fiscal year	55	82
Three years prior to current fiscal year	51	26
Four years prior to current fiscal year	14	10
Prior	122	214
Total loans, net of unearned income	274	434
Consumer | 680 to 760
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	64,938	68,634
Consumer | 680 to 760 | Residential first mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	1,465	3,741
One year prior to current fiscal year	3,175	1,857
Two years prior to current fiscal year	1,527	655
Three years prior to current fiscal year	533	846
Four years prior to current fiscal year	697	1,368
Prior	4,593	4,133
Total loans, net of unearned income	11,990	12,600
Consumer | 680 to 760 | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	50,253	52,778
Consumer | 680 to 760 | Home equity loans (pre-reset)
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	932	1,014
Consumer | 680 to 760 | Home equity loans (post-reset)
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	1,347	1,569
Consumer | 680 to 760 | Home equity loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	2,279	2,583
Consumer | 680 to 760 | Personal, small business and other
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	35	58
One year prior to current fiscal year	56	106
Two years prior to current fiscal year	77	80
Three years prior to current fiscal year	55	27
Four years prior to current fiscal year	16	9
Prior	177	393
Total loans, net of unearned income	416	673
Consumer | Greater than 760
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	82,547	84,224
Consumer | Greater than 760 | Residential first mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	3,637	9,052
One year prior to current fiscal year	8,605	5,384
Two years prior to current fiscal year	4,063	1,227
Three years prior to current fiscal year	919	1,829
Four years prior to current fiscal year	1,403	3,799
Prior	9,816	9,105
Total loans, net of unearned income	28,443	30,396
Consumer | Greater than 760 | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	50,827	49,767
Consumer | Greater than 760 | Home equity loans (pre-reset)
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	1,470	1,657
Consumer | Greater than 760 | Home equity loans (post-reset)
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	1,327	1,524
Consumer | Greater than 760 | Home equity loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	2,797	3,181
Consumer | Greater than 760 | Personal, small business and other
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	68	95
One year prior to current fiscal year	95	134
Two years prior to current fiscal year	99	84
Three years prior to current fiscal year	58	30
Four years prior to current fiscal year	18	8
Prior	142	529
Total loans, net of unearned income	480	880
Consumer | FICO not available
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	6,566	5,450
Consumer | FICO not available | Residential first mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	1,850	1,870
Consumer | FICO not available | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	2,201	1,041
Consumer | FICO not available | Home equity loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	9	17
Consumer | FICO not available | Personal, small business and other
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	2,506	2,522
Consumer | Total loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	$ 178,974	$ 189,228

LOANS - Impaired Consumer Loans

LOANS - Impaired Consumer Loans (Details) - Consumer $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021USD ($)Q	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)Q	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)Q	Dec. 31, 2020USD ($)
Financing Receivable, Impaired [Line Items]
Recorded investment	$ 4,469		$ 4,469		$ 4,469	$ 4,799
Unpaid principal balance	4,972		4,972		4,972	5,300
Related specific allowance	1,084		1,084		1,084	1,345
Average carrying value					$ 4,632	4,577
Interest income recognized	$ 72	$ 60	$ 143	$ 119
Number of quarters used to calculate the average recorded investment balance | Q	4		4		4
Residential first mortgages
Financing Receivable, Impaired [Line Items]
Recorded investment	$ 1,606		$ 1,606		$ 1,606	1,787
Unpaid principal balance	1,768		1,768		1,768	1,962
Related specific allowance	122		122		122	157
Average carrying value					1,689	1,661
Interest income recognized	21	15	42	29
Impaired financing receivable without specific allowance	202		202		202	211
Home equity loans
Financing Receivable, Impaired [Line Items]
Recorded investment	433		433		433	478
Unpaid principal balance	587		587		587	651
Related specific allowance	33		33		33	60
Average carrying value					468	527
Interest income recognized	3	4	6	7
Impaired financing receivable without specific allowance	127		127		127	147
Credit cards
Financing Receivable, Impaired [Line Items]
Recorded investment	1,906		1,906		1,906	1,982
Unpaid principal balance	1,942		1,942		1,942	2,135
Related specific allowance	770		770		770	918
Average carrying value					1,951	1,926
Interest income recognized	33	25	68	51
Personal, small business and other
Financing Receivable, Impaired [Line Items]
Recorded investment	524		524		524	552
Unpaid principal balance	675		675		675	552
Related specific allowance	159		159		159	210
Average carrying value					$ 524	$ 463
Interest income recognized	$ 15	$ 16	$ 27	$ 32

LOANS - Consumer Troubled Debt

LOANS - Consumer Troubled Debt Restructurings (Details) - Consumer $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)loan	Jun. 30, 2020USD ($)loan	Jun. 30, 2021USD ($)loan	Jun. 30, 2020USD ($)loan
Loans receivable
Period within which default occurred post-modification			1 year
Number of days past due, non-accrual status			60 days
In North America offices
Loans receivable
Number of loans modified | loan	36,938	51,615	96,837	119,689
Post-modification recorded investment	$ 245	$ 282	$ 614	$ 643
TDR loans in payment default	$ 92	$ 118	$ 178	$ 226
In North America offices | Residential first mortgages
Loans receivable
Number of loans modified | loan	326	298	661	575
Post-modification recorded investment	$ 57	$ 51	$ 115	$ 95
Average interest rate reduction	0.00%	0.00%	0.00%	0.00%
Post-modification recorded investment for borrowers that have gone through Chapter 7 bankruptcy	$ 4	$ 3	$ 7	$ 7
TDR loans in payment default	15	21	33	35
In North America offices | Residential first mortgages | New OCC guidance
Loans receivable
Post-modification recorded investment for borrowers that have gone through Chapter 7 bankruptcy	$ 1	$ 2	$ 2	$ 5
In North America offices | Home equity loans
Loans receivable
Number of loans modified | loan	50	83	107	165
Post-modification recorded investment	$ 4	$ 8	$ 8	$ 16
Average interest rate reduction	0.00%	0.00%	0.00%	1.00%
Post-modification recorded investment for borrowers that have gone through Chapter 7 bankruptcy	$ 0.3	$ 1	$ 0.4	$ 2
TDR loans in payment default	3	4	7	6
In North America offices | Home equity loans | New OCC guidance
Loans receivable
Post-modification recorded investment for borrowers that have gone through Chapter 7 bankruptcy	$ 0.3	$ 1	$ 0.3	$ 1
In North America offices | Credit cards
Loans receivable
Number of loans modified | loan	36,337	50,891	95,383	118,173
Post-modification recorded investment	$ 181	$ 220	$ 481	$ 525
Average interest rate reduction	17.00%	17.00%	17.00%	17.00%
TDR loans in payment default	$ 73	$ 92	$ 136	$ 182
In North America offices | Personal, small business and other
Loans receivable
Number of loans modified | loan	225	343	686	776
Post-modification recorded investment	$ 3	$ 3	$ 10	$ 7
Average interest rate reduction	3.00%	4.00%	3.00%	3.00%
TDR loans in payment default	$ 1	$ 1	$ 2	$ 3
In offices outside North America
Loans receivable
Number of loans modified | loan	25,607	33,202	58,210	60,707
Post-modification recorded investment	$ 179	$ 215	$ 362	$ 353
TDR loans in payment default	$ 92	$ 61	$ 177	$ 117
In offices outside North America | Residential first mortgages
Loans receivable
Number of loans modified | loan	530	642	997	1,178
Post-modification recorded investment	$ 28	$ 44	$ 52	$ 58
Average interest rate reduction	1.00%	4.00%	1.00%	4.00%
TDR loans in payment default	$ 10	$ 5	$ 22	$ 11
In offices outside North America | Credit cards
Loans receivable
Number of loans modified | loan	18,297	21,276	42,896	40,591
Post-modification recorded investment	$ 94	$ 94	$ 196	$ 167
Average interest rate reduction	12.00%	16.00%	14.00%	16.00%
TDR loans in payment default	$ 45	$ 38	$ 97	$ 71
In offices outside North America | Personal, small business and other
Loans receivable
Number of loans modified | loan	6,780	11,284	14,317	18,938
Post-modification recorded investment	$ 57	$ 77	$ 114	$ 128
Average interest rate reduction	10.00%	10.00%	10.00%	10.00%
TDR loans in payment default	$ 37	$ 18	$ 58	$ 35
Deferred principal | In North America offices
Loans receivable
Post-modification recorded investment	0	0	0	0
Deferred principal | In North America offices | Residential first mortgages
Loans receivable
Post-modification recorded investment	0	0	0	0
Deferred principal | In North America offices | Home equity loans
Loans receivable
Post-modification recorded investment	0	0	0	0
Deferred principal | In North America offices | Credit cards
Loans receivable
Post-modification recorded investment	0	0	0	0
Deferred principal | In North America offices | Personal, small business and other
Loans receivable
Post-modification recorded investment	0	0	0	0
Deferred principal | In offices outside North America
Loans receivable
Post-modification recorded investment	0	0	0	0
Deferred principal | In offices outside North America | Residential first mortgages
Loans receivable
Post-modification recorded investment	0	0	0	0
Deferred principal | In offices outside North America | Credit cards
Loans receivable
Post-modification recorded investment	0	0	0	0
Deferred principal | In offices outside North America | Personal, small business and other
Loans receivable
Post-modification recorded investment	0	0	0	0
Contingent principal forgiveness | In North America offices
Loans receivable
Post-modification recorded investment	0	0	0	0
Contingent principal forgiveness | In North America offices | Residential first mortgages
Loans receivable
Post-modification recorded investment	0	0	0	0
Contingent principal forgiveness | In North America offices | Home equity loans
Loans receivable
Post-modification recorded investment	0	0	0	0
Contingent principal forgiveness | In North America offices | Credit cards
Loans receivable
Post-modification recorded investment	0	0	0	0
Contingent principal forgiveness | In North America offices | Personal, small business and other
Loans receivable
Post-modification recorded investment	0	0	0	0
Contingent principal forgiveness | In offices outside North America
Loans receivable
Post-modification recorded investment	0	0	0	0
Contingent principal forgiveness | In offices outside North America | Residential first mortgages
Loans receivable
Post-modification recorded investment	0	0	0	0
Contingent principal forgiveness | In offices outside North America | Credit cards
Loans receivable
Post-modification recorded investment	0	0	0	0
Contingent principal forgiveness | In offices outside North America | Personal, small business and other
Loans receivable
Post-modification recorded investment	0	0	0	0
Principal forgiveness | In North America offices
Loans receivable
Post-modification recorded investment	0	0	0	0
Principal forgiveness | In North America offices | Residential first mortgages
Loans receivable
Post-modification recorded investment	0	0	0	0
Principal forgiveness | In North America offices | Home equity loans
Loans receivable
Post-modification recorded investment	0	0	0	0
Principal forgiveness | In North America offices | Credit cards
Loans receivable
Post-modification recorded investment	0	0	0	0
Principal forgiveness | In North America offices | Personal, small business and other
Loans receivable
Post-modification recorded investment	0	0	0	0
Principal forgiveness | In offices outside North America
Loans receivable
Post-modification recorded investment	3	5	13	9
Principal forgiveness | In offices outside North America | Residential first mortgages
Loans receivable
Post-modification recorded investment	0	0	0	0
Principal forgiveness | In offices outside North America | Credit cards
Loans receivable
Post-modification recorded investment	1	3	9	5
Principal forgiveness | In offices outside North America | Personal, small business and other
Loans receivable
Post-modification recorded investment	$ 2	$ 2	$ 4	$ 4

LOANS - Schedule of Purchased C

LOANS - Schedule of Purchased Credit Deteriorated Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Credit cards
Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price [Abstract]
Purchase price	$ 0	$ 0	$ 0
Allowance for credit losses at acquisition date	0	0	0
Discount or premium attributable to non-credit factors	0	0	0
Par value (amortized cost basis)	0	0	0
Mortgages
Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price [Abstract]
Purchase price	10	12	3
Allowance for credit losses at acquisition date	0	0	0
Discount or premium attributable to non-credit factors	0	0	0
Par value (amortized cost basis)	10	12	3
Installment and other
Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price [Abstract]
Purchase price	0	0	0
Allowance for credit losses at acquisition date	0	0	0
Discount or premium attributable to non-credit factors	0	0	0
Par value (amortized cost basis)	$ 0	$ 0	$ 0

LOANS - Corporate Loans (Detail

LOANS - Corporate Loans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Loans
Total loans, net of unearned income	$ 676,834		$ 676,834		$ 675,883
Lease financing
Loans
Total loans, net of unearned income	600		600		700
Corporate
Loans
Total loans, net of unearned income	400,939		400,939		387,044
Unearned income	(841)		(841)		(844)
Loans sold and/or reclassified to held-for-sale	1,700	$ 800	3,100	$ 1,000
Corporate | Commercial and industrial
Loans
Total loans, net of unearned income	152,134		152,134		156,340
Corporate | Financial institutions
Loans
Total loans, net of unearned income	100,989		100,989		87,689
Corporate | Mortgage and real estate
Loans
Total loans, net of unearned income	73,156		73,156		72,038
Corporate | Lease financing
Loans
Total loans, net of unearned income	602		602		738
Corporate | In North America offices
Loans
Total loans, net of unearned income	208,509		208,509		201,632
Corporate | In North America offices | Commercial and industrial
Loans
Total loans, net of unearned income	53,549		53,549		57,731
Corporate | In North America offices | Financial institutions
Loans
Total loans, net of unearned income	65,494		65,494		55,809
Corporate | In North America offices | Mortgage and real estate
Loans
Total loans, net of unearned income	62,162		62,162		60,675
Corporate | In North America offices | Installment and other
Loans
Total loans, net of unearned income	26,757		26,757		26,744
Corporate | In North America offices | Lease financing
Loans
Total loans, net of unearned income	547		547		673
Corporate | In offices outside North America
Loans
Total loans, net of unearned income	192,430		192,430		185,412
Corporate | In offices outside North America | Commercial and industrial
Loans
Total loans, net of unearned income	105,486		105,486		104,072
Corporate | In offices outside North America | Financial institutions
Loans
Total loans, net of unearned income	35,713		35,713		32,334
Corporate | In offices outside North America | Mortgage and real estate
Loans
Total loans, net of unearned income	10,995		10,995		11,371
Corporate | In offices outside North America | Installment and other
Loans
Total loans, net of unearned income	35,787		35,787		33,759
Corporate | In offices outside North America | Lease financing
Loans
Total loans, net of unearned income	54		54		65
Corporate | In offices outside North America | Government and official institutions
Loans
Total loans, net of unearned income	$ 4,395		$ 4,395		$ 3,811

LOANS - Corporate Loan Delinque

LOANS - Corporate Loan Delinquency (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of unearned income	$ 676,834	$ 675,883
Loans held at fair value	7,707	6,854
Lease financing
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of unearned income	600	700
Corporate
Financing Receivable, Credit Quality Indicator [Line Items]
Past due and accruing	2,305	2,144
Total non-accrual	2,576	3,527
Loans, net of unearned income	400,939	387,044
Loans held at fair value	7,693	6,840
Corporate | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Past due and accruing	939	509
Total non-accrual	1,878	2,795
Loans, net of unearned income	152,134	156,340
Corporate | Financial institutions
Financing Receivable, Credit Quality Indicator [Line Items]
Past due and accruing	801	733
Total non-accrual	39	92
Loans, net of unearned income	100,989	87,689
Corporate | Mortgage and real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Past due and accruing	231	697
Total non-accrual	458	505
Loans, net of unearned income	73,156	72,038
Corporate | Lease financing
Financing Receivable, Credit Quality Indicator [Line Items]
Past due and accruing	26	74
Total non-accrual	22	24
Loans, net of unearned income	602	738
Corporate | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Past due and accruing	308	131
Total non-accrual	179	111
Loans, net of unearned income	66,365	63,399
Corporate | 30 to 89 Days Past Due
Financing Receivable, Credit Quality Indicator [Line Items]
Past due and accruing	1,602	1,692
Corporate | 30 to 89 Days Past Due | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Past due and accruing	818	400
Corporate | 30 to 89 Days Past Due | Financial institutions
Financing Receivable, Credit Quality Indicator [Line Items]
Past due and accruing	477	668
Corporate | 30 to 89 Days Past Due | Mortgage and real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Past due and accruing	210	450
Corporate | 30 to 89 Days Past Due | Lease financing
Financing Receivable, Credit Quality Indicator [Line Items]
Past due and accruing	26	62
Corporate | 30 to 89 Days Past Due | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Past due and accruing	71	112
Corporate | Equal to and greater than 90 days past due and accruing
Financing Receivable, Credit Quality Indicator [Line Items]
Past due and accruing	703	452
Corporate | Equal to and greater than 90 days past due and accruing | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Past due and accruing	121	109
Corporate | Equal to and greater than 90 days past due and accruing | Financial institutions
Financing Receivable, Credit Quality Indicator [Line Items]
Past due and accruing	324	65
Corporate | Equal to and greater than 90 days past due and accruing | Mortgage and real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Past due and accruing	21	247
Corporate | Equal to and greater than 90 days past due and accruing | Lease financing
Financing Receivable, Credit Quality Indicator [Line Items]
Past due and accruing	0	12
Corporate | Equal to and greater than 90 days past due and accruing | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Past due and accruing	237	19
Corporate | Current
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of unearned income	388,365	374,533
Corporate | Current | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of unearned income	149,317	153,036
Corporate | Current | Financial institutions
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of unearned income	100,149	86,864
Corporate | Current | Mortgage and real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of unearned income	72,467	70,836
Corporate | Current | Lease financing
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of unearned income	554	640
Corporate | Current | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of unearned income	$ 65,878	$ 63,157

LOANS - Corporate Loans Credit

LOANS - Corporate Loans Credit Quality Indicators (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	$ 676,834	$ 675,883
Loans held at fair value	7,707	6,854
Lease financing
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	600	700
Corporate
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	400,939	387,044
Total non-accrual	2,576	3,527
Loans held at fair value	7,693	6,840
Corporate | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	152,134	156,340
Total non-accrual	1,878	2,795
Corporate | Financial institutions
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	100,989	87,689
Total non-accrual	39	92
Corporate | Mortgage and real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	73,156	72,038
Total non-accrual	458	505
Corporate | Lease financing
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	602	738
Total non-accrual	22	24
Corporate | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net of unearned income	66,365	63,399
Total non-accrual	179	111
Corporate | Non-rated private bank loans managed on a delinquency basis
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	5,600	9,823
One year prior to current fiscal year	9,537	7,121
Two years prior to current fiscal year	6,551	3,533
Three years prior to current fiscal year	3,210	3,674
Four years prior to current fiscal year	3,248	4,300
Prior	10,043	7,942
Revolving line of credit arrangements	0	0
Total loans, net of unearned income	38,189	36,393
Corporate | Corporate loans, net of unearned income
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	91,572	107,122
One year prior to current fiscal year	40,794	36,513
Two years prior to current fiscal year	29,777	29,628
Three years prior to current fiscal year	23,864	17,059
Four years prior to current fiscal year	14,017	11,340
Prior	38,628	32,195
Revolving line of credit arrangements	154,594	146,347
Total loans, net of unearned income	400,939	387,044
Loans held at fair value	7,693	6,840
Corporate | Investment grade
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	62,964	66,625
One year prior to current fiscal year	23,677	20,851
Two years prior to current fiscal year	15,800	17,806
Three years prior to current fiscal year	14,649	8,211
Four years prior to current fiscal year	6,861	4,767
Prior	22,076	17,709
Revolving line of credit arrangements	127,410	115,311
Total loans, net of unearned income	273,437	251,280
Corporate | Investment grade | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	37,302	38,398
One year prior to current fiscal year	7,576	7,607
Two years prior to current fiscal year	5,592	5,929
Three years prior to current fiscal year	5,066	3,909
Four years prior to current fiscal year	3,302	2,094
Prior	9,628	8,670
Revolving line of credit arrangements	28,121	25,819
Total loans, net of unearned income	96,587	92,426
Corporate | Investment grade | Financial institutions
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	12,951	10,560
One year prior to current fiscal year	4,271	2,964
Two years prior to current fiscal year	1,809	2,106
Three years prior to current fiscal year	1,409	782
Four years prior to current fiscal year	914	681
Prior	2,615	2,030
Revolving line of credit arrangements	66,706	56,239
Total loans, net of unearned income	90,675	75,362
Corporate | Investment grade | Mortgage and real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	2,896	6,793
One year prior to current fiscal year	5,748	6,714
Two years prior to current fiscal year	5,845	5,174
Three years prior to current fiscal year	3,859	2,568
Four years prior to current fiscal year	2,010	1,212
Prior	3,204	1,719
Revolving line of credit arrangements	1,545	1,557
Total loans, net of unearned income	25,107	25,737
Corporate | Investment grade | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	9,815	10,874
One year prior to current fiscal year	6,082	3,566
Two years prior to current fiscal year	2,554	4,597
Three years prior to current fiscal year	4,315	952
Four years prior to current fiscal year	635	780
Prior	6,629	5,290
Revolving line of credit arrangements	31,038	31,696
Total loans, net of unearned income	61,068	57,755
Corporate | Non-investment grade, accrual | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	15,439	19,683
One year prior to current fiscal year	4,660	4,794
Two years prior to current fiscal year	3,892	4,645
Three years prior to current fiscal year	3,334	2,883
Four years prior to current fiscal year	2,304	1,182
Prior	4,020	4,533
Revolving line of credit arrangements	20,021	23,400
Total loans, net of unearned income	53,670	61,120
Corporate | Non-investment grade, accrual | Financial institutions
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	5,008	7,413
One year prior to current fiscal year	936	700
Two years prior to current fiscal year	546	654
Three years prior to current fiscal year	334	274
Four years prior to current fiscal year	101	141
Prior	273	197
Revolving line of credit arrangements	3,076	2,855
Total loans, net of unearned income	10,274	12,234
Corporate | Non-investment grade, accrual | Mortgage and real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	1,302	1,882
One year prior to current fiscal year	1,314	1,919
Two years prior to current fiscal year	2,133	2,058
Three years prior to current fiscal year	1,633	1,457
Four years prior to current fiscal year	1,045	697
Prior	1,304	837
Revolving line of credit arrangements	672	551
Total loans, net of unearned income	9,403	9,401
Corporate | Non-investment grade, accrual | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	1,127	1,407
One year prior to current fiscal year	456	918
Two years prior to current fiscal year	644	725
Three years prior to current fiscal year	516	370
Four years prior to current fiscal year	312	186
Prior	647	657
Revolving line of credit arrangements	1,995	1,986
Total loans, net of unearned income	5,697	6,249
Corporate | Non-investment grade, non-accrual | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	40	260
One year prior to current fiscal year	182	203
Two years prior to current fiscal year	201	192
Three years prior to current fiscal year	83	143
Four years prior to current fiscal year	108	57
Prior	172	223
Revolving line of credit arrangements	1,091	1,717
Total non-accrual	1,877	2,795
Corporate | Non-investment grade, non-accrual | Financial institutions
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	1
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	11	0
Revolving line of credit arrangements	29	91
Total non-accrual	40	92
Corporate | Non-investment grade, non-accrual | Mortgage and real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	2	13
One year prior to current fiscal year	13	4
Two years prior to current fiscal year	5	3
Three years prior to current fiscal year	85	18
Four years prior to current fiscal year	10	8
Prior	62	32
Revolving line of credit arrangements	280	427
Total non-accrual	457	505
Corporate | Non-investment grade, non-accrual | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	90	15
One year prior to current fiscal year	19	3
Two years prior to current fiscal year	5	12
Three years prior to current fiscal year	20	29
Four years prior to current fiscal year	28	2
Prior	20	65
Revolving line of credit arrangements	20	9
Total non-accrual	202	135
Corporate | Non-investment grade
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	23,008	30,674
One year prior to current fiscal year	7,580	8,541
Two years prior to current fiscal year	7,426	8,289
Three years prior to current fiscal year	6,005	5,174
Four years prior to current fiscal year	3,908	2,273
Prior	6,509	6,544
Revolving line of credit arrangements	27,184	31,036
Total loans, net of unearned income	$ 81,620	$ 92,531

LOANS - Non-accrual Corporate L

LOANS - Non-accrual Corporate Loans (Details) - Corporate - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Financing Receivable, Impaired [Line Items]
Recorded investment	$ 2,576		$ 2,576		$ 3,527
Unpaid principal balance	3,591		3,591		4,907
Related specific allowance	345		345		515
Average carrying value			3,199		3,402
Interest income recognized	15	$ 4	31	$ 19
Recorded investment	1,768		1,768		1,927
Recorded investment	808		808		1,600
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Recorded investment	1,878		1,878		2,795
Unpaid principal balance	2,453		2,453		3,664
Related specific allowance	314		314		442
Average carrying value			2,481		2,649
Interest income recognized	15		25
Recorded investment	1,568		1,568		1,523
Recorded investment	310		310		1,272
Financial institutions
Financing Receivable, Impaired [Line Items]
Recorded investment	39		39		92
Unpaid principal balance	116		116		181
Related specific allowance	0		0		17
Average carrying value			83		132
Interest income recognized	0		0
Recorded investment	0		0		90
Recorded investment	39		39		2
Mortgage and real estate
Financing Receivable, Impaired [Line Items]
Recorded investment	458		458		505
Unpaid principal balance	749		749		803
Related specific allowance	28		28		38
Average carrying value			486		413
Interest income recognized	0		0
Recorded investment	142		142		246
Recorded investment	316		316		259
Lease financing
Financing Receivable, Impaired [Line Items]
Recorded investment	22		22		24
Unpaid principal balance	22		22		24
Related specific allowance	0		0		0
Average carrying value			28		34
Interest income recognized	0		0
Recorded investment	22		22		24
Other
Financing Receivable, Impaired [Line Items]
Recorded investment	179		179		111
Unpaid principal balance	251		251		235
Related specific allowance	3		3		18
Average carrying value			121		174
Interest income recognized	0		6
Recorded investment	58		58		68
Recorded investment	$ 121		$ 121		$ 43

LOANS - Corporate Troubled Debt

LOANS - Corporate Troubled Debt Restructurings (Details) - Corporate - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Financing receivable impaired
Carrying value of TDRs modified during the period	$ 57	$ 94	$ 80	$ 160
Period within which default occurred post-modification			1 year
Number of days past due, default status			60 days
TDR balance	416	507	$ 416	507
TDR loans in payment default	0	0	0	0
Commercial and industrial
Financing receivable impaired
Carrying value of TDRs modified during the period	52	86	73	148
TDR balance	298	406	298	406
TDR loans in payment default	0	0	0	0
Mortgage and real estate
Financing receivable impaired
Carrying value of TDRs modified during the period	5	4	6	8
TDR balance	80	91	80	91
TDR loans in payment default	0	0	0	0
Other
Financing receivable impaired
Carrying value of TDRs modified during the period	0	4	1	4
TDR balance	38	10	38	10
TDR loans in payment default	0	0	$ 0	0
Commercial banking loans
Financing receivable impaired
Number of days past due, default status			90 days
TDRs involving changes in the amount and/or timing of principal payments
Financing receivable impaired
Carrying value of TDRs modified during the period	0	4	$ 1	4
TDRs involving changes in the amount and/or timing of principal payments | Commercial and industrial
Financing receivable impaired
Carrying value of TDRs modified during the period	0	0	0	0
TDRs involving changes in the amount and/or timing of principal payments | Mortgage and real estate
Financing receivable impaired
Carrying value of TDRs modified during the period	0	0	0	0
TDRs involving changes in the amount and/or timing of principal payments | Other
Financing receivable impaired
Carrying value of TDRs modified during the period	0	4	1	4
TDRs involving changes in the amount and/or timing of interest payments
Financing receivable impaired
Carrying value of TDRs modified during the period	0	0	0	0
TDRs involving changes in the amount and/or timing of interest payments | Commercial and industrial
Financing receivable impaired
Carrying value of TDRs modified during the period	0	0	0	0
TDRs involving changes in the amount and/or timing of interest payments | Mortgage and real estate
Financing receivable impaired
Carrying value of TDRs modified during the period	0	0	0	0
TDRs involving changes in the amount and/or timing of interest payments | Other
Financing receivable impaired
Carrying value of TDRs modified during the period	0	0	0	0
TDRs involving changes in the amount and/or timing of both principal and interest payments
Financing receivable impaired
Carrying value of TDRs modified during the period	57	90	79	156
TDRs involving changes in the amount and/or timing of both principal and interest payments | Commercial and industrial
Financing receivable impaired
Carrying value of TDRs modified during the period	52	86	73	148
TDRs involving changes in the amount and/or timing of both principal and interest payments | Mortgage and real estate
Financing receivable impaired
Carrying value of TDRs modified during the period	5	4	6	8
TDRs involving changes in the amount and/or timing of both principal and interest payments | Other
Financing receivable impaired
Carrying value of TDRs modified during the period	$ 0	$ 0	$ 0	$ 0

ALLOWANCE FOR CREDIT LOSSES - A

ALLOWANCE FOR CREDIT LOSSES - Allowance for Credit Losses Roll Forward (Details) - USD ($) $ in Millions	Jan. 01, 2020	Jun. 30, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Allowance for credit losses
Allowance for credit losses on loans (ACLL) at beginning of period	$ 12,783	$ 21,638	$ 26,298	$ 20,380	$ 12,783	$ 24,956	$ 12,783
Gross credit losses on loans		(1,844)		(2,528)		(4,052)	(5,007)
Gross recoveries on loans		524		367		984	787
Net credit losses on loans (NCLs)		(1,320)		(2,161)		(3,068)	(4,220)
Net reserve builds (releases)		(2,184)		5,195		(5,252)	9,289
Net specific reserve builds (releases) for loans		(262)		634		(421)	858
Total provision for credit losses on loans (PCLL)		(1,126)		7,990		(2,605)	14,367
Initial allowance for credit losses on newly purchased credit-deteriorated assets during the period		0		0		0	4
Other, net		46		89		(45)	(394)
ACLL at end of period		19,238		26,298	20,380	19,238	26,298
Allowance for credit losses on unfunded commitments
Allowance for credit losses on unfunded commitments (ACLUC) at beginning of period	1,456	2,012	1,859	1,813	1,456	2,655	1,456
Provision (release) for credit losses on unfunded lending commitments		44		113		(582)	670
Other, net		17		(67)		0	(73)
ACLUC at end of period		2,073		1,859	1,813	2,073	1,859
Total allowance for credit losses on loans, leases and unfunded lending commitments		21,311		28,157		21,311	28,157
Sales or transfers of various consumer loan portfolios to HFS
Sales or transfers of various consumer loan portfolios to HFS		0		(1)		0	(4)
FX translation		62		88		(46)	(395)
Other		(16)		2		1	5
Other, net		46		89		(45)	(394)
Variable post-charge-off third-party collection costs
Allowance for credit losses
Allowance for credit losses on loans (ACLL) at beginning of period	(443)	0		0	(443)	0	(443)
Total provision for credit losses on loans (PCLL)			$ 122	339	(18)
ACLL at end of period	(443)				0
Cumulative Effect, Period of Adoption, Adjustment
Allowance for credit losses
Allowance for credit losses on loans (ACLL) at beginning of period	4,201	0		0	4,201	0	4,201
Net reserve builds (releases)	4,900
ACLL at end of period	4,100				0
Allowance for credit losses on unfunded commitments
Allowance for credit losses on unfunded commitments (ACLUC) at beginning of period	(194)	0		0	(194)	0	(194)
ACLUC at end of period					0
Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for credit losses
Allowance for credit losses on loans (ACLL) at beginning of period	$ 16,541	$ 21,638		$ 20,380	16,541	$ 24,956	$ 16,541
ACLL at end of period					$ 20,380

ALLOWANCE FOR CREDIT LOSSES -_2

ALLOWANCE FOR CREDIT LOSSES - Allowance for Credit Losses Roll Forward by Segment (Details) - USD ($) $ in Millions	Jan. 01, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Allowance for credit losses
Allowance for credit losses on loans (ACLL) at beginning of period	$ 12,783	$ 21,638	$ 20,380	$ 24,956	$ 12,783
Charge-offs		(1,844)	(2,528)	(4,052)	(5,007)
Recoveries		524	367	984	787
Replenishment of NCLs		1,320	2,161	3,068	4,220
Net reserve builds (releases)		(2,184)	5,195	(5,252)	9,289
Net specific reserve builds (releases)		(262)	634	(421)	858
Initial allowance for credit losses on newly purchased credit-deteriorated assets during the period		0	0	0	4
Other		46	89	(45)	(394)
ACLL at end of period		19,238	26,298	19,238	26,298
ACLL
Collectively evaluated		17,810		17,810		$ 23,094
Individually evaluated		1,429		1,429		1,860
Total ACLL		19,238	26,298	19,238	26,298	24,956
Loans, net of unearned income
Collectively evaluated		661,948		661,948		660,562
Individually evaluated		7,045		7,045		8,326
Loans held at fair value		7,707		7,707		6,854
Total loans, net of unearned income		676,834		676,834		675,883
Variable post-charge-off third-party collection costs
Allowance for credit losses
Allowance for credit losses on loans (ACLL) at beginning of period	(443)	0	0	0	(443)
ACLL at end of period	(443)
ACLL
Total ACLL	(443)					0
Purchased credit deteriorated(1)
ACLL
Purchased credit deteriorated(1)		(1)		(1)		2
Loans, net of unearned income
Purchased credit deteriorated		134		134		141
Corporate
Allowance for credit losses
Allowance for credit losses on loans (ACLL) at beginning of period	2,886	4,084	3,451	5,402	2,886
Charge-offs		(151)	(347)	(354)	(485)
Recoveries		62	23	79	34
Replenishment of NCLs		89	324	275	451
Net reserve builds (releases)		(820)	2,883	(2,093)	4,151
Net specific reserve builds (releases)		(130)	486	(168)	534
Initial allowance for credit losses on newly purchased credit-deteriorated assets during the period		0	0	0	0
Other		(7)	4	(14)	(26)
ACLL at end of period		3,127	6,824	3,127	6,824
ACLL
Collectively evaluated		2,782		2,782		4,887
Individually evaluated		345		345		515
Total ACLL		3,127	6,824	3,127	6,824	5,402
Loans, net of unearned income
Collectively evaluated		390,670		390,670		376,677
Individually evaluated		2,576		2,576		3,527
Loans held at fair value		7,693		7,693		6,840
Total loans, net of unearned income		400,939		400,939		387,044
Corporate | Variable post-charge-off third-party collection costs
Allowance for credit losses
Allowance for credit losses on loans (ACLL) at beginning of period	0			0	0
ACLL
Total ACLL						0
Corporate | Purchased credit deteriorated(1)
ACLL
Purchased credit deteriorated(1)		0		0		0
Loans, net of unearned income
Purchased credit deteriorated		0		0		0
Consumer
Allowance for credit losses
Allowance for credit losses on loans (ACLL) at beginning of period	9,897	17,554	16,929	19,554	9,897
Charge-offs		(1,693)	(2,181)	(3,698)	(4,522)
Recoveries		462	344	905	753
Replenishment of NCLs		1,231	1,837	2,793	3,769
Net reserve builds (releases)		(1,364)	2,312	(3,159)	5,138
Net specific reserve builds (releases)		(132)	148	(253)	324
Initial allowance for credit losses on newly purchased credit-deteriorated assets during the period		0	0	0	4
Other		53	85	(31)	(368)
ACLL at end of period		16,111	19,474	16,111	19,474
ACLL
Collectively evaluated		15,028		15,028		18,207
Individually evaluated		1,084		1,084		1,345
Total ACLL		16,111	19,474	16,111	19,474	19,554
Loans, net of unearned income
Collectively evaluated		271,278		271,278		283,885
Individually evaluated		4,469		4,469		4,799
Loans held at fair value		14		14		14
Total loans, net of unearned income		275,895		275,895		288,839
Consumer | Variable post-charge-off third-party collection costs
Allowance for credit losses
Allowance for credit losses on loans (ACLL) at beginning of period	(443)			0	(443)
ACLL
Total ACLL						0
Consumer | Purchased credit deteriorated(1)
ACLL
Purchased credit deteriorated(1)		(1)		(1)		2
Loans, net of unearned income
Purchased credit deteriorated		134		134		141
Cumulative Effect, Period of Adoption, Adjustment
Allowance for credit losses
Allowance for credit losses on loans (ACLL) at beginning of period	4,201	$ 0	$ 0	0	4,201
Net reserve builds (releases)	4,900
ACLL at end of period	4,100
ACLL
Total ACLL	4,100					0
Cumulative Effect, Period of Adoption, Adjustment | Corporate
Allowance for credit losses
Allowance for credit losses on loans (ACLL) at beginning of period	(721)			0	(721)
ACLL
Total ACLL						0
Cumulative Effect, Period of Adoption, Adjustment | Consumer
Allowance for credit losses
Allowance for credit losses on loans (ACLL) at beginning of period	$ 4,922			$ 0	$ 4,922
ACLL
Total ACLL						$ 0

ALLOWANCE FOR CREDIT LOSSES - S

ALLOWANCE FOR CREDIT LOSSES - Schedule of Allowance for Credit Losses for HTM Debt Securities (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses on HTM debt securities at beginning of quarter	$ 78	$ 76	$ 86	$ 0
Gross credit losses	0	0	0	0
Gross recoveries	0	0	3	0
Net credit losses (NCLs)	0	0	3	0
Net reserve builds (releases)	4	31	(4)	37
Net specific reserve builds (releases)	0	0	0	0
Total provision for credit losses on HTM debt securities	4	31	(7)	37
Other, net	1	0	1	0
Initial allowance for credit losses on newly purchased credit-deteriorated securities during the period	0	0	0	0
Allowance for credit losses on HTM debt securities at end of quarter	83	107	83	107
Mortgage-backed securities
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses on HTM debt securities at beginning of quarter	4		3
Gross credit losses	0		0
Gross recoveries	0		3
Net credit losses (NCLs)	0		3
Net reserve builds (releases)	1		2
Net specific reserve builds (releases)	0		0
Total provision for credit losses on HTM debt securities	1		(1)
Other, net	0		0
Initial allowance for credit losses on newly purchased credit-deteriorated securities during the period	0		0
Allowance for credit losses on HTM debt securities at end of quarter	5		5
State and municipal
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses on HTM debt securities at beginning of quarter	69	66	74	0
Gross credit losses	0	0	0	0
Gross recoveries	0	0	0	0
Net credit losses (NCLs)	0	0	0	0
Net reserve builds (releases)	3	30	(2)	35
Net specific reserve builds (releases)	0	0	0	0
Total provision for credit losses on HTM debt securities	3	30	(2)	35
Other, net	0	3	0	3
Initial allowance for credit losses on newly purchased credit-deteriorated securities during the period	0	0	0	0
Allowance for credit losses on HTM debt securities at end of quarter	72	99	72	99
Foreign government
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses on HTM debt securities at beginning of quarter	5	4	6	0
Gross credit losses	0	0	0	0
Gross recoveries	0	0	0	0
Net credit losses (NCLs)	0	0	0	0
Net reserve builds (releases)	0	2	(1)	2
Net specific reserve builds (releases)	0	0	0	0
Total provision for credit losses on HTM debt securities	0	2	(1)	2
Other, net	0	0	0	0
Initial allowance for credit losses on newly purchased credit-deteriorated securities during the period	0	0	0	0
Allowance for credit losses on HTM debt securities at end of quarter	5	6	5	6
Asset-based financing
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses on HTM debt securities at beginning of quarter	0	6	3	0
Gross credit losses	0	0	0	0
Gross recoveries	0	0	0	0
Net credit losses (NCLs)	0	0	0	0
Net reserve builds (releases)	0	(1)	(3)	0
Net specific reserve builds (releases)	0	0	0	0
Total provision for credit losses on HTM debt securities	0	(1)	(3)	0
Other, net	1	(3)	1	(3)
Initial allowance for credit losses on newly purchased credit-deteriorated securities during the period	0	0	0	0
Allowance for credit losses on HTM debt securities at end of quarter	$ 1	2	$ 1	2
Cumulative Effect, Period of Adoption, Adjustment
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses on HTM debt securities at beginning of quarter		0		70
Cumulative Effect, Period of Adoption, Adjustment | State and municipal
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses on HTM debt securities at beginning of quarter		0		61
Cumulative Effect, Period of Adoption, Adjustment | Foreign government
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses on HTM debt securities at beginning of quarter		0		4
Cumulative Effect, Period of Adoption, Adjustment | Asset-based financing
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses on HTM debt securities at beginning of quarter		$ 0		$ 5

ALLOWANCE FOR CREDIT LOSSES -_3

ALLOWANCE FOR CREDIT LOSSES - Schedule of Allowance for Credit Losses for Other Assets (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Financing Receivable, Other Assets, Allowance For Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	$ 63	$ 54	$ 55	$ 0
Gross credit losses	0	0	0	0
Gross recoveries	0	0	0	0
Net credit losses (NCLs)	0	0	0	0
Net reserve builds (releases)	(3)	48	6	44
Total provision for credit losses	(3)	48	6	44
Other, net	0	0	(1)	32
Allowance for credit losses at end of period	60	102	60	102
Cash and due from banks
Financing Receivable, Other Assets, Allowance For Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	0	0	0	0
Gross credit losses	0	0	0	0
Gross recoveries	0	0	0	0
Net credit losses (NCLs)	0	0	0	0
Net reserve builds (releases)	0	0	0	(6)
Total provision for credit losses	0	0	0	(6)
Other, net	0	0	0	0
Allowance for credit losses at end of period	0	0	0	0
Deposits with banks
Financing Receivable, Other Assets, Allowance For Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	28	8	20	0
Gross credit losses	0	0	0	0
Gross recoveries		0	0	0
Net credit losses (NCLs)	0	0	0	0
Net reserve builds (releases)	(4)	10	5	4
Total provision for credit losses	(4)	10	5	4
Other, net	0	0	(1)	0
Allowance for credit losses at end of period	24	18	24	18
Securities borrowed and purchased under agreements to resell
Financing Receivable, Other Assets, Allowance For Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	5	5	10	0
Gross credit losses	0	0	0	0
Gross recoveries	0	0	0	0
Net credit losses (NCLs)	0	0	0	0
Net reserve builds (releases)	3	2	(2)	5
Total provision for credit losses	3	2	(2)	5
Other, net	0	0	0	0
Allowance for credit losses at end of period	8	7	8	7
Brokerage receivables
Financing Receivable, Other Assets, Allowance For Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	0	0	0	0
Gross credit losses	0	0	0	0
Gross recoveries	0	0	0	0
Net credit losses (NCLs)	0	0	0	0
Net reserve builds (releases)	0	0	0	(1)
Total provision for credit losses	0	0	0	(1)
Other, net	0	0	0	0
Allowance for credit losses at end of period	0	0	0	0
All other assets
Financing Receivable, Other Assets, Allowance For Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period	30	41	25	0
Gross credit losses	0	0	0	0
Gross recoveries	0	0	0	0
Net credit losses (NCLs)	0	0	0	0
Net reserve builds (releases)	(2)	36	3	42
Total provision for credit losses	(2)	36	3	42
Other, net	0	0	0	32
Allowance for credit losses at end of period	$ 28	77	$ 28	77
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Other Assets, Allowance For Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period		0		26
Cumulative Effect, Period of Adoption, Adjustment | Cash and due from banks
Financing Receivable, Other Assets, Allowance For Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period		0		6
Cumulative Effect, Period of Adoption, Adjustment | Deposits with banks
Financing Receivable, Other Assets, Allowance For Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period		0		14
Cumulative Effect, Period of Adoption, Adjustment | Securities borrowed and purchased under agreements to resell
Financing Receivable, Other Assets, Allowance For Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period		0		2
Cumulative Effect, Period of Adoption, Adjustment | Brokerage receivables
Financing Receivable, Other Assets, Allowance For Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period		0		1
Cumulative Effect, Period of Adoption, Adjustment | All other assets
Financing Receivable, Other Assets, Allowance For Credit Loss [Roll Forward]
Allowance for credit losses at beginning of period		$ 0		$ 3

GOODWILL AND INTANGIBLE ASSET_2

GOODWILL AND INTANGIBLE ASSETS - Changes in Goodwill (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2021	Mar. 31, 2021
Goodwill
Balance of goodwill at beginning of period	$ 21,905	$ 22,162
Foreign currency translation	155	(257)
Balance of goodwill at end of period	22,060	21,905
Global Consumer Banking
Goodwill
Balance of goodwill at beginning of period	12,074	12,142
Foreign currency translation	34	(68)
Balance of goodwill at end of period	12,108	12,074
Institutional Clients Group
Goodwill
Balance of goodwill at beginning of period	9,831	10,020
Foreign currency translation	121	(189)
Balance of goodwill at end of period	$ 9,952	$ 9,831

GOODWILL AND INTANGIBLE ASSET_3

GOODWILL AND INTANGIBLE ASSETS - Additional Information (Details)	Jul. 01, 2020
Minimum
Goodwill [Line Items]
Percentage fair value exceeds carrying value	115.00%
Maximum
Goodwill [Line Items]
Percentage fair value exceeds carrying value	136.00%

GOODWILL AND INTANGIBLE ASSET_4

GOODWILL AND INTANGIBLE ASSETS - Components of Intangible Assets (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Finite and Indefinite-lived Intangible Assets
Gross carrying amount of Intangible assets (excluding MSRs)	$ 10,314	$ 10,371
Accumulated amortization of Intangible assets (excluding MSRs)	6,046	5,960
Net carrying amount of Intangible assets (excluding MSRs)	4,268	4,411
Gross carrying amount, Mortgage servicing rights (MSRs)	419	336
Mortgage servicing rights (MSRs)	419	336
Gross carrying amount of Intangible assets	10,733	10,707
Accumulated amortization of Intangible assets	6,046	5,960
Total intangible assets	4,687	4,747
Indefinite-lived intangible assets
Finite and Indefinite-lived Intangible Assets
Gross carrying amount of Intangible assets (excluding MSRs)	189	190
Net carrying amount of Intangible assets (excluding MSRs)	189	190
Purchased credit card relationships
Finite and Indefinite-lived Intangible Assets
Gross carrying amount of Intangible assets (excluding MSRs)	5,615	5,648
Accumulated amortization of Intangible assets (excluding MSRs)	4,283	4,229
Net carrying amount of Intangible assets (excluding MSRs)	1,332	1,419
Credit card contract related intangibles
Finite and Indefinite-lived Intangible Assets
Gross carrying amount of Intangible assets (excluding MSRs)	3,924	3,929
Accumulated amortization of Intangible assets (excluding MSRs)	1,323	1,276
Net carrying amount of Intangible assets (excluding MSRs)	2,601	2,653
Core deposit intangibles
Finite and Indefinite-lived Intangible Assets
Gross carrying amount of Intangible assets (excluding MSRs)	44	45
Accumulated amortization of Intangible assets (excluding MSRs)	44	44
Net carrying amount of Intangible assets (excluding MSRs)	0	1
Other customer relationships
Finite and Indefinite-lived Intangible Assets
Gross carrying amount of Intangible assets (excluding MSRs)	434	455
Accumulated amortization of Intangible assets (excluding MSRs)	306	314
Net carrying amount of Intangible assets (excluding MSRs)	128	141
Present value of future profits
Finite and Indefinite-lived Intangible Assets
Gross carrying amount of Intangible assets (excluding MSRs)	32	32
Accumulated amortization of Intangible assets (excluding MSRs)	30	30
Net carrying amount of Intangible assets (excluding MSRs)	2	2
Other
Finite and Indefinite-lived Intangible Assets
Gross carrying amount of Intangible assets (excluding MSRs)	76	72
Accumulated amortization of Intangible assets (excluding MSRs)	60	67
Net carrying amount of Intangible assets (excluding MSRs)	$ 16	$ 5
Customer Concentration Risk | American Airlines, Costco, The Home Depot and AT&T | Intangible Assets, Excluding Mortgage Servicing Rights | Credit card contract related intangibles
Finite and Indefinite-lived Intangible Assets
Concentration risk, percentage	97.00%	96.00%

GOODWILL AND INTANGIBLE ASSET_5

GOODWILL AND INTANGIBLE ASSETS - Changes in Intangible Assets (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Finite and Indefinite-lived Intangible Assets
Beginning balance	$ 4,411
Acquisitions/renewals/ divestitures	49
Amortization	(182)
Impairments	(1)
FX translation and other	(9)
Ending balance	4,268	$ 4,411
Mortgage servicing rights (MSRs)	419	336
Total intangible assets	4,687	4,747
Indefinite-lived intangible assets
Finite and Indefinite-lived Intangible Assets
Beginning balance	190
Acquisitions/renewals/ divestitures	0
Amortization	0
Impairments	0
FX translation and other	(1)
Ending balance	189	190
Purchased credit card relationships
Finite and Indefinite-lived Intangible Assets
Beginning balance	1,419
Acquisitions/renewals/ divestitures	0
Amortization	(86)
Impairments	0
FX translation and other	(1)
Ending balance	1,332	1,419
Credit card contract related intangibles
Finite and Indefinite-lived Intangible Assets
Beginning balance	2,653
Acquisitions/renewals/ divestitures	19
Amortization	(70)
Impairments	(1)
FX translation and other	0
Ending balance	2,601	2,653
Core deposit intangibles
Finite and Indefinite-lived Intangible Assets
Beginning balance	1
Acquisitions/renewals/ divestitures	0
Amortization	(1)
Impairments	0
FX translation and other	0
Ending balance	0	1
Other customer relationships
Finite and Indefinite-lived Intangible Assets
Beginning balance	141
Acquisitions/renewals/ divestitures	7
Amortization	(12)
Impairments	0
FX translation and other	(8)
Ending balance	128	141
Present value of future profits
Finite and Indefinite-lived Intangible Assets
Beginning balance	2
Acquisitions/renewals/ divestitures	0
Amortization	0
Impairments	0
FX translation and other	0
Ending balance	2	2
Other
Finite and Indefinite-lived Intangible Assets
Beginning balance	5
Acquisitions/renewals/ divestitures	23
Amortization	(13)
Impairments	0
FX translation and other	1
Ending balance	$ 16	$ 5
American Airlines, Costco, The Home Depot and AT&T | Customer Concentration Risk | Intangible Assets, Excluding Mortgage Servicing Rights | Credit card contract related intangibles
Finite and Indefinite-lived Intangible Assets
Concentration risk, percentage	97.00%	96.00%

DEBT - Short-Term Borrowings (D

DEBT - Short-Term Borrowings (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Short-term Debt [Line Items]
Commercial paper	$ 18,666	$ 18,010
Other borrowings	12,796	11,504
Total short-term borrowings	31,462	29,514
Collateralized short-term advances from Federal Home Loan Bank	2,000	4,000
Bank
Short-term Debt [Line Items]
Commercial paper	8,974	10,022
Broker-dealer and other
Short-term Debt [Line Items]
Commercial paper	$ 9,692	$ 7,988

DEBT - Long-Term Debt (Details)

DEBT - Long-Term Debt (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Debt Instrument
Long-term debt, at fair value	$ 264,575	$ 271,686
Trust preferred securities	1,700	1,700
Citigroup Inc.
Debt Instrument
Long-term debt, at fair value	174,366	170,563
Bank
Debt Instrument
Long-term debt, at fair value	28,661	44,742
Bank | Senior notes
Debt Instrument
Collateralized long-term advances from Federal Home Loan Bank	9,500	10,900
Broker-dealer and other
Debt Instrument
Long-term debt, at fair value	$ 61,548	$ 56,381

DEBT - Trust Preferred Securiti

DEBT - Trust Preferred Securities (Details) $ in Millions	Jun. 30, 2021USD ($)shares
Trust Preferred Securities
Liquidation value	$ 2,578
Junior subordinated debentures owned by the Trust, amount	$ 2,584
Citigroup Capital III
Trust Preferred Securities
Securities issued (in shares) | shares	194,053
Liquidation value	$ 194
Coupon rate	7.625%
Common shares issued to parent (in shares) | shares	6,003
Junior subordinated debentures owned by the Trust, amount	$ 200
Citigroup Capital XIII
Trust Preferred Securities
Securities issued (in shares) | shares	89,840,000
Liquidation value	$ 2,246
Common shares issued to parent (in shares) | shares	1,000
Junior subordinated debentures owned by the Trust, amount	$ 2,246
Citigroup Capital XIII | LIBOR
Trust Preferred Securities
Basis spread on variable rate	0.0637
Citigroup Capital XVIII
Trust Preferred Securities
Securities issued (in shares) | shares	99,901
Liquidation value	$ 138
Common shares issued to parent (in shares) | shares	50
Junior subordinated debentures owned by the Trust, amount	$ 138
Citigroup Capital XVIII | LIBOR
Trust Preferred Securities
Basis spread on variable rate	0.008875

CHANGES IN ACCUMULATED OTHER _3

CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI) - Change in Each Component of AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Change in accumulated other comprehensive income (loss)
Balance, beginning of period			$ 200,200
Balance, end of period	$ 202,910	$ 192,386	202,910	$ 192,386
Net unrealized gains (losses) on debt securities
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	1,535	2,863	3,320	(265)
Other comprehensive income before reclassifications	(379)	1,391	(1,898)	4,795
Increase (decrease) due to amounts reclassified from AOCI	(95)	(554)	(361)	(830)
Total other comprehensive income	(474)	837	(2,259)	3,965
Balance, end of period	1,061	3,700	1,061	3,700
Debt valuation adjustment (DVA)
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	(1,461)	2,196	(1,419)	(944)
Other comprehensive income before reclassifications	(72)	(2,204)	(156)	913
Increase (decrease) due to amounts reclassified from AOCI	10	(28)	52	(5)
Total other comprehensive income	(62)	(2,232)	(104)	908
Balance, end of period	(1,523)	(36)	(1,523)	(36)
Cash flow hedges
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	1,037	2,020	1,593	123
Other comprehensive income before reclassifications	28	226	(316)	2,124
Increase (decrease) due to amounts reclassified from AOCI	(201)	(152)	(413)	(153)
Total other comprehensive income	(173)	74	(729)	1,971
Balance, end of period	864	2,094	864	2,094
Benefit plans
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	(6,150)	(7,095)	(6,864)	(6,809)
Other comprehensive income before reclassifications	36	(132)	689	(476)
Increase (decrease) due to amounts reclassified from AOCI	51	55	112	113
Total other comprehensive income	87	(77)	801	(363)
Balance, end of period	(6,063)	(7,172)	(6,063)	(7,172)
Foreign currency translation adjustment (CTA), net of hedges
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	(29,915)	(32,500)	(28,641)	(28,391)
Other comprehensive income before reclassifications	523	561	(751)	(3,548)
Increase (decrease) due to amounts reclassified from AOCI	0	0	0	0
Total other comprehensive income	523	561	(751)	(3,548)
Balance, end of period	(29,392)	(31,939)	(29,392)	(31,939)
Excluded component of fair value hedges
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	(57)	(5)	(47)	(32)
Other comprehensive income before reclassifications	(11)	13	(21)	40
Increase (decrease) due to amounts reclassified from AOCI	1	0	1	0
Total other comprehensive income	(10)	13	(20)	40
Balance, end of period	(67)	8	(67)	8
Accumulated other comprehensive income (loss)
Change in accumulated other comprehensive income (loss)
Balance, beginning of period	(35,011)	(32,521)	(32,058)	(36,318)
Other comprehensive income before reclassifications	125	(145)	(2,453)	3,848
Increase (decrease) due to amounts reclassified from AOCI	(234)	(679)	(609)	(875)
Total other comprehensive income	(109)	(824)	(3,062)	2,973
Balance, end of period	$ (35,120)	$ (33,345)	$ (35,120)	$ (33,345)

CHANGES IN ACCUMULATED OTHER _4

CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI) - Schedule of Pre-Tax and After-Tax (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Change in accumulated other comprehensive income (loss), after-tax
Balance, beginning of period			$ 200,200
Balance, end of period	$ 202,910	$ 192,386	202,910	$ 192,386
Change in net unrealized gains (losses) on debt securities
Change in accumulated other comprehensive income (loss), pretax
Other comprehensive income (loss), pretax	(638)	1,178	(3,065)	5,298
Change in accumulated other comprehensive income (loss), tax effect
Other comprehensive income (loss), tax effect	164	(341)	806	(1,333)
Change in accumulated other comprehensive income (loss), after-tax
Balance, beginning of period	1,535	2,863	3,320	(265)
Total other comprehensive income	(474)	837	(2,259)	3,965
Balance, end of period	1,061	3,700	1,061	3,700
Debt valuation adjustment (DVA)
Change in accumulated other comprehensive income (loss), pretax
Other comprehensive income (loss), pretax	(110)	(2,935)	(148)	1,253
Change in accumulated other comprehensive income (loss), tax effect
Other comprehensive income (loss), tax effect	48	703	44	(345)
Change in accumulated other comprehensive income (loss), after-tax
Balance, beginning of period	(1,461)	2,196	(1,419)	(944)
Total other comprehensive income	(62)	(2,232)	(104)	908
Balance, end of period	(1,523)	(36)	(1,523)	(36)
Hedges
Change in accumulated other comprehensive income (loss), after-tax
Balance, beginning of period	(57)	(5)	(47)	(32)
Total other comprehensive income	(10)	13	(20)	40
Balance, end of period	(67)	8	(67)	8
Benefit plans
Change in accumulated other comprehensive income (loss), pretax
Other comprehensive income (loss), pretax	84	(93)	991	(510)
Change in accumulated other comprehensive income (loss), tax effect
Other comprehensive income (loss), tax effect	3	16	(190)	147
Change in accumulated other comprehensive income (loss), after-tax
Balance, beginning of period	(6,150)	(7,095)	(6,864)	(6,809)
Total other comprehensive income	87	(77)	801	(363)
Balance, end of period	(6,063)	(7,172)	(6,063)	(7,172)
Foreign currency translation adjustment
Change in accumulated other comprehensive income (loss), pretax
Other comprehensive income (loss), pretax	445	485	(894)	(3,570)
Change in accumulated other comprehensive income (loss), tax effect
Other comprehensive income (loss), tax effect	78	76	143	22
Change in accumulated other comprehensive income (loss), after-tax
Balance, beginning of period	(29,915)	(32,500)	(28,641)	(28,391)
Total other comprehensive income	523	561	(751)	(3,548)
Balance, end of period	(29,392)	(31,939)	(29,392)	(31,939)
Citigroup's accumulated other comprehensive income (loss)
Change in accumulated other comprehensive income (loss), pretax
Balance, beginning of period, pretax	(40,631)	(36,419)	(36,992)	(42,772)
Other comprehensive income (loss), pretax	(456)	(1,259)	(4,095)	5,094
Balance, end of period, pretax	(41,087)	(37,678)	(41,087)	(37,678)
Change in accumulated other comprehensive income (loss), tax effect
Balance, beginning of period, tax effect	5,620	3,898	4,934	6,454
Other comprehensive income (loss), tax effect	347	435	1,033	(2,121)
Balance, end of period, tax effect	5,967	4,333	5,967	4,333
Change in accumulated other comprehensive income (loss), after-tax
Balance, beginning of period	(35,011)	(32,521)	(32,058)	(36,318)
Total other comprehensive income	(109)	(824)	(3,062)	2,973
Balance, end of period	(35,120)	(33,345)	(35,120)	(33,345)
Cash flow hedges | Hedges
Change in accumulated other comprehensive income (loss), pretax
Other comprehensive income (loss), pretax	(224)	90	(953)	2,574
Change in accumulated other comprehensive income (loss), tax effect
Other comprehensive income (loss), tax effect	51	(16)	224	(603)
Change in accumulated other comprehensive income (loss), after-tax
Total other comprehensive income	(173)	74	(729)	1,971
Fair value hedges | Hedges
Change in accumulated other comprehensive income (loss), pretax
Other comprehensive income (loss), pretax	(13)	16	(26)	49
Change in accumulated other comprehensive income (loss), tax effect
Other comprehensive income (loss), tax effect	3	(3)	6	(9)
Change in accumulated other comprehensive income (loss), after-tax
Total other comprehensive income	$ (10)	$ 13	$ (20)	$ 40

CHANGES IN ACCUMULATED OTHER _5

CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI) - Reclassification out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Realized (gains) losses on sales of investments	$ (137)	$ (748)	$ (538)	$ (1,180)
Tax effect	1,155	52	3,487	632
Income (loss) from continuing operations	(6,193)	(1,057)	(14,170)	(3,605)
Realized gains (losses) on investment securities
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Total amounts reclassified out of AOCI, after-tax	(95)	(554)	(361)	(830)
Realized gains (losses) on investment securities | (Gain) loss reclassified from AOCI
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Realized (gains) losses on sales of investments	(137)	(748)	(538)	(1,180)
Gross impairment losses	9	19	78	71
Income from continuing operations before income taxes	(128)	(729)	(460)	(1,109)
Tax effect	33	175	99	279
Income (loss) from continuing operations	(95)	(554)	(361)	(830)
Debt valuation adjustment (DVA)
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Total amounts reclassified out of AOCI, after-tax	10	(28)	52	(5)
Debt valuation adjustment (DVA) | (Gain) loss reclassified from AOCI
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Realized (gains) losses on sales of investments	13	(37)	69	(6)
Tax effect	(3)	9	(17)	1
Income (loss) from continuing operations	10	(28)	52	(5)
Cash flow hedges
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Total amounts reclassified out of AOCI, after-tax	(201)	(152)	(413)	(153)
Cash flow hedges | (Gain) loss reclassified from AOCI
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Income from continuing operations before income taxes	(265)	(199)	(542)	(201)
Tax effect	64	47	129	48
Cash flow hedges | (Gain) loss reclassified from AOCI | Interest rate contracts
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Income from continuing operations before income taxes	(266)	(200)	(544)	(203)
Cash flow hedges | (Gain) loss reclassified from AOCI | Foreign exchange contracts
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Income from continuing operations before income taxes	1	1	2	2
Benefit plan adjustments
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Total amounts reclassified out of AOCI, pretax	69	75	150	151
Total tax effect	(18)	(20)	(38)	(38)
Total amounts reclassified out of AOCI, after-tax	51	55	112	113
Prior service cost (benefit)
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Total amounts reclassified out of AOCI, pretax	(6)	(3)	(12)	(6)
Net actuarial loss
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Total amounts reclassified out of AOCI, pretax	71	75	158	154
Curtailment/settlement impact
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Total amounts reclassified out of AOCI, pretax	4	3	4	3
Excluded component of fair value hedges
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Total amounts reclassified out of AOCI, after-tax	1	0	1	0
Excluded component of fair value hedges | (Gain) loss reclassified from AOCI
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Income from continuing operations before income taxes	1		1
Tax effect	0	0	0	0
Total amounts reclassified out of AOCI, after-tax	1	0	1	0
Foreign currency translation adjustment
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Total amounts reclassified out of AOCI, after-tax	0	0	0	0
Foreign currency translation adjustment | (Gain) loss reclassified from AOCI
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Income from continuing operations before income taxes	0	0	0	0
Tax effect	0	0	0	0
Citigroup's accumulated other comprehensive income (loss)
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Total amounts reclassified out of AOCI, pretax	(310)	(890)	(782)	(1,165)
Total tax effect	76	211	173	290
Total amounts reclassified out of AOCI, after-tax	$ (234)	$ (679)	$ (609)	$ (875)

SECURITIZATIONS AND VARIABLE _3

SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Schedule of Variable Interest Entities (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Variable Interest Entity
Total involvement with SPE assets	$ 512,202	$ 485,411
Consolidated VIE/SPE assets	56,487	60,056
Significant unconsolidated VIE assets	455,715	425,355
Funded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, debt investments	39,890	36,581
Maximum exposure to loss in significant unconsolidated VIEs, equity investments	4,992	5,643
Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments	15,335	13,783
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives	107	118
Funded and Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs	60,324	56,125
Private equity
Variable Interest Entity
Significant unconsolidated VIE assets	109,000	78,000
Funded and Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs	507	425
Venture capital investments
Funded and Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs	59,600	57,000
Credit card securitizations
Variable Interest Entity
Total involvement with SPE assets	30,948	32,420
Consolidated VIE/SPE assets	30,948	32,420
Significant unconsolidated VIE assets	0	0
Funded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, debt investments	0	0
Maximum exposure to loss in significant unconsolidated VIEs, equity investments	0	0
Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments	0	0
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives	0	0
Funded and Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs	0	0
Mortgage securitizations - U.S. agency-sponsored
Variable Interest Entity
Total involvement with SPE assets	114,664	123,999
Consolidated VIE/SPE assets	0	0
Significant unconsolidated VIE assets	114,664	123,999
Funded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, debt investments	1,533	1,948
Maximum exposure to loss in significant unconsolidated VIEs, equity investments	0	0
Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments	0	0
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives	50	61
Funded and Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs	1,583	2,009
Mortgage securitizations - Non-agency-sponsored
Variable Interest Entity
Total involvement with SPE assets	57,157	46,132
Consolidated VIE/SPE assets	773	939
Significant unconsolidated VIE assets	56,384	45,193
Funded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, debt investments	2,893	2,550
Maximum exposure to loss in significant unconsolidated VIEs, equity investments	0	0
Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments	5	2
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives	0	1
Funded and Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs	2,898	2,553
Citi-administered asset-backed commercial paper conduits
Variable Interest Entity
Total involvement with SPE assets	14,566	16,730
Consolidated VIE/SPE assets	14,566	16,730
Significant unconsolidated VIE assets	0	0
Funded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, debt investments	0	0
Maximum exposure to loss in significant unconsolidated VIEs, equity investments	0	0
Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments	0	0
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives	0	0
Funded and Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs	0	0
Collateralized loan obligations (CLOs)
Variable Interest Entity
Total involvement with SPE assets	11,430	18,332
Consolidated VIE/SPE assets	0	0
Significant unconsolidated VIE assets	11,430	18,332
Funded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, debt investments	3,529	4,273
Maximum exposure to loss in significant unconsolidated VIEs, equity investments	0	0
Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments	0	0
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives	0	0
Funded and Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs	3,529	4,273
Asset-based financing
Variable Interest Entity
Total involvement with SPE assets	256,827	222,274
Consolidated VIE/SPE assets	8,657	8,069
Significant unconsolidated VIE assets	248,170	214,205
Funded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, debt investments	29,196	25,153
Maximum exposure to loss in significant unconsolidated VIEs, equity investments	1,195	1,587
Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments	10,255	9,114
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives	0	0
Funded and Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs	40,646	35,854
Municipal securities tender option bond trusts (TOBs)
Variable Interest Entity
Total involvement with SPE assets	3,302	3,349
Consolidated VIE/SPE assets	915	835
Significant unconsolidated VIE assets	2,387	2,514
Funded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, debt investments	0	0
Maximum exposure to loss in significant unconsolidated VIEs, equity investments	0	0
Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments	1,523	1,611
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives	0	0
Funded and Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs	1,523	1,611
Municipal investments
Variable Interest Entity
Total involvement with SPE assets	21,914	20,335
Consolidated VIE/SPE assets	0	0
Significant unconsolidated VIE assets	21,914	20,335
Funded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, debt investments	2,662	2,569
Maximum exposure to loss in significant unconsolidated VIEs, equity investments	3,797	4,056
Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments	3,539	3,041
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives	0	0
Funded and Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs	9,998	9,666
Client intermediation
Variable Interest Entity
Total involvement with SPE assets	911	1,352
Consolidated VIE/SPE assets	470	910
Significant unconsolidated VIE assets	441	442
Funded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, debt investments	75	88
Maximum exposure to loss in significant unconsolidated VIEs, equity investments	0	0
Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments	0	0
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives	56	56
Funded and Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs	131	144
Investment funds
Variable Interest Entity
Total involvement with SPE assets	483	488
Consolidated VIE/SPE assets	158	153
Significant unconsolidated VIE assets	325	335
Funded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, debt investments	2	0
Maximum exposure to loss in significant unconsolidated VIEs, equity investments	0	0
Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments	13	15
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives	1	0
Funded and Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs	16	15
Other
Variable Interest Entity
Total involvement with SPE assets	0	0
Consolidated VIE/SPE assets	0	0
Significant unconsolidated VIE assets	0	0
Funded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, debt investments	0	0
Maximum exposure to loss in significant unconsolidated VIEs, equity investments	0	0
Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs, funding commitments	0	0
Maximum exposure to loss in significant unconsolidated VIEs, guarantees and derivatives	0	0
Funded and Unfunded Exposure
Maximum exposure to loss in significant unconsolidated VIEs	0	0
Mortgage-backed securities
Funded and Unfunded Exposure
Outstanding balance of mortgage loans securitized	$ 5,000	$ 5,200

SECURITIZATIONS AND VARIABLE _4

SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Funding Commitments (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Funding Commitments for Significant Unconsolidated VIEs
Notional amount	$ 15,335	$ 13,783
Liquidity facilities
Funding Commitments for Significant Unconsolidated VIEs
Notional amount	1,523	1,611
Liquidity facilities | Non-agency-sponsored mortgage securitizations
Funding Commitments for Significant Unconsolidated VIEs
Notional amount	0	0
Liquidity facilities | Asset-based financing
Funding Commitments for Significant Unconsolidated VIEs
Notional amount	0	0
Liquidity facilities | Municipal securities tender option bond trusts (TOBs)
Funding Commitments for Significant Unconsolidated VIEs
Notional amount	1,523	1,611
Liquidity facilities | Municipal investments
Funding Commitments for Significant Unconsolidated VIEs
Notional amount	0	0
Liquidity facilities | Investment funds
Funding Commitments for Significant Unconsolidated VIEs
Notional amount	0	0
Liquidity facilities | Other
Funding Commitments for Significant Unconsolidated VIEs
Notional amount	0	0
Loan / equity commitments
Funding Commitments for Significant Unconsolidated VIEs
Notional amount	13,812	12,172
Loan / equity commitments | Non-agency-sponsored mortgage securitizations
Funding Commitments for Significant Unconsolidated VIEs
Notional amount	5	2
Loan / equity commitments | Asset-based financing
Funding Commitments for Significant Unconsolidated VIEs
Notional amount	10,255	9,114
Loan / equity commitments | Municipal securities tender option bond trusts (TOBs)
Funding Commitments for Significant Unconsolidated VIEs
Notional amount	0	0
Loan / equity commitments | Municipal investments
Funding Commitments for Significant Unconsolidated VIEs
Notional amount	3,539	3,041
Loan / equity commitments | Investment funds
Funding Commitments for Significant Unconsolidated VIEs
Notional amount	13	15
Loan / equity commitments | Other
Funding Commitments for Significant Unconsolidated VIEs
Notional amount	$ 0	$ 0

SECURITIZATIONS AND VARIABLE _5

SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Carrying Amounts and Classifications of Consolidated Assets (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Variable Interest Entity
Cash	$ 27,117	$ 26,349	$ 22,889
Trading account assets	370,950	375,079
Investments	487,063	447,359
Total loans, net of allowance	657,596	650,927
Increase in other assets	116,089	110,683
Total assets	2,327,868	2,260,090
Unconsolidated VIEs
Variable Interest Entity
Cash	0	0
Trading account assets	1,400	2,000
Investments	9,600	10,600
Total loans, net of allowance	33,200	29,300
Increase in other assets	700	300
Total assets	$ 44,900	$ 42,200

SECURITIZATIONS AND VARIABLE _6

SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Credit Card Securitizations (Details) $ in Billions	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)trust	Jun. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Securitized credit card receivables
Number of trusts to hold securitized credit card receivables | trust			2
Ownership interests in principal amount of trust credit card receivables
Sold to investors via trust-issued securities	$ 11		$ 11		$ 15.7
Retained by Citigroup as trust-issued securities	7.2		7.2		7.9
Retained by Citigroup via non-certificated interests	14.6		14.6		11.1
Total ownership interests in principal amount of trust credit card receivables	32.8		32.8		$ 34.7
Credit card securitizations
Cash Flows Between Transferor and Transferee
Proceeds from new securitizations	0	$ 0	0	$ 0
Pay down of maturing notes	$ (1.1)	$ (3.2)	$ (4.7)	$ (3.2)

SECURITIZATIONS AND VARIABLE _7

SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Funding, Liquidity Facilities and Subordinated Interests (Details) - USD ($) $ in Billions	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Citibank Credit Card Master Trust (Master Trust)
Funding, Liquidity Facilities and Subordinated Interests
Weighted average maturity of term notes	3 years 7 months 6 days	2 years 10 months 24 days
Term notes issued to third parties	$ 9.7	$ 13.9
Term notes retained by Citigroup affiliates	2.2	2.7
Total Master Trust liabilities	$ 11.9	$ 16.6
Citibank OMNI Master Trust (Omni Trust)
Funding, Liquidity Facilities and Subordinated Interests
Weighted average maturity of term notes	1 year 9 months 18 days	1 year 1 month 6 days
Term notes issued to third parties	$ 1.3	$ 1.8
Term notes retained by Citigroup affiliates	5	5.2
Total Master Trust liabilities	$ 6.3	$ 7

SECURITIZATIONS AND VARIABLE _8

SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Mortgage Securitizations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Mortgage securitizations - U.S. agency sponsored
Cash Flows Between Transferor and Transferee
Principal securitized	$ 1,900	$ 2,400	$ 4,900	$ 4,500
Proceeds from new securitizations	1,900	2,600	5,100	4,700
Purchases of previously transferred financial assets	0	0	100	100
Gains recognized on the securitization	0.2	$ 2	1.3	$ 4
Carrying value of retained interests	$ 388		$ 388		$ 315
Key assumptions used in measuring fair value of retained interests at date of sale or securitization of mortgage receivables
Weighted average life (in years)	7 years 9 months 18 days	4 years 1 month 6 days	7 years 9 months 18 days	4 years 8 months 12 days
Key assumptions used in measuring fair value related to transferor's continuing involvement
Weighted average life (in years)			5 years 6 months		4 years 6 months
Sensitivity analysis of fair value of interests continued to be held by transferor
Carrying value of retained interests, impact of 10% adverse change in discount rate	$ (9)		$ (9)		$ (8)
Carrying value of retained interests, impact of 20% adverse change in discount rate	(18)		(18)		(15)
Carrying value of retained interests, impact of 10% adverse change in constant prepayment rate	(20)		(20)		(21)
Carrying value of retained interests, impact of 20% adverse change in constant prepayment rate	$ (38)		$ (38)		$ (40)
Mortgage securitizations - U.S. agency sponsored | Weighted Average
Key assumptions used in measuring fair value of retained interests at date of sale or securitization of mortgage receivables
Weighted average discount rate (as a percent)	9.00%	3.50%	8.90%	6.00%
Weighted average constant prepayment rate (as a percent)	4.20%	28.70%	5.00%	27.10%
Key assumptions used in measuring fair value related to transferor's continuing involvement
Weighted average discount rate (as a percent)			6.40%		5.90%
Weighted average constant prepayment rate (as a percent)			12.50%		22.70%
Mortgage securitizations - Non-agency-sponsored
Cash Flows Between Transferor and Transferee
Principal securitized	$ 7,100	$ 900	$ 18,100	$ 1,600
Proceeds from new securitizations	7,200	900	17,800	3,400
Purchases of previously transferred financial assets	0	0	0	0
Gains recognized on the securitization	135.6	$ 27	301.7	$ 65
Senior interests
Cash Flows Between Transferor and Transferee
Carrying value of retained interests	$ 2,393		$ 2,393		$ 1,210
Key assumptions used in measuring fair value of retained interests at date of sale or securitization of mortgage receivables
Weighted average life (in years)	6 years 8 months 12 days	9 years 9 months 18 days	3 years 4 months 24 days	4 years 9 months 18 days
Key assumptions used in measuring fair value related to transferor's continuing involvement
Weighted average life (in years)			4 years 8 months 12 days		5 years 3 months 18 days
Sensitivity analysis of fair value of interests continued to be held by transferor
Carrying value of retained interests, impact of 10% adverse change in discount rate	$ 0		$ 0		$ 0
Carrying value of retained interests, impact of 20% adverse change in discount rate	0		0		(1)
Carrying value of retained interests, impact of 10% adverse change in constant prepayment rate	0		0		0
Carrying value of retained interests, impact of 20% adverse change in constant prepayment rate	0		0		0
Carrying value of retained interests, impact of 10% adverse change in anticipated net credit losses	0		0		0
Carrying value of retained interests, impact of 20% adverse change in anticipated net credit losses	$ 0		$ 0		$ 0
Senior interests | Weighted Average
Key assumptions used in measuring fair value of retained interests at date of sale or securitization of mortgage receivables
Weighted average discount rate (as a percent)	1.80%	6.20%	0.40%	1.80%
Weighted average constant prepayment rate (as a percent)	0.00%	0.00%	0.00%	0.00%
Weighted average anticipated net credit losses (as a percent)	0.00%	0.00%	0.40%	1.60%
Key assumptions used in measuring fair value related to transferor's continuing involvement
Weighted average discount rate (as a percent)			7.90%		7.20%
Weighted average constant prepayment rate (as a percent)			4.50%		5.30%
Weighted average anticipated net credit losses (as a percent)			1.00%		1.20%
Subordinated interests
Cash Flows Between Transferor and Transferee
Carrying value of retained interests	$ 479		$ 479		$ 145
Key assumptions used in measuring fair value of retained interests at date of sale or securitization of mortgage receivables
Weighted average life (in years)	5 years 8 months 12 days	2 years 3 months 18 days	5 years 6 months	2 years 3 months 18 days
Key assumptions used in measuring fair value related to transferor's continuing involvement
Weighted average life (in years)			18 years 2 months 12 days		4 years 8 months 12 days
Sensitivity analysis of fair value of interests continued to be held by transferor
Carrying value of retained interests, impact of 10% adverse change in discount rate	$ (1)		$ (1)		$ (1)
Carrying value of retained interests, impact of 20% adverse change in discount rate	(2)		(2)		(1)
Carrying value of retained interests, impact of 10% adverse change in constant prepayment rate	0		0		0
Carrying value of retained interests, impact of 20% adverse change in constant prepayment rate	0		0		0
Carrying value of retained interests, impact of 10% adverse change in anticipated net credit losses	0		0		0
Carrying value of retained interests, impact of 20% adverse change in anticipated net credit losses	$ 0		$ 0		$ 0
Subordinated interests | Weighted Average
Key assumptions used in measuring fair value of retained interests at date of sale or securitization of mortgage receivables
Weighted average discount rate (as a percent)	2.80%	3.00%	2.90%	3.00%
Weighted average constant prepayment rate (as a percent)	10.00%	25.00%	10.30%	25.00%
Weighted average anticipated net credit losses (as a percent)	1.00%	0.50%	1.10%	0.50%
Key assumptions used in measuring fair value related to transferor's continuing involvement
Weighted average discount rate (as a percent)			3.00%		4.30%
Weighted average constant prepayment rate (as a percent)			4.60%		4.70%
Weighted average anticipated net credit losses (as a percent)			1.20%		1.40%
Personal loan
Cash Flows Between Transferor and Transferee
Carrying value of retained interests	$ 93		$ 93

SECURITIZATIONS AND VARIABLE _9

SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Loan Delinquencies and Liquidation Losses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Residential mortgages
Variable Interest Entity
Securitized assets	$ 28,700		$ 28,700		$ 16,900
Liquidation losses	5	$ 7	6.6	$ 18
Commercial and other
Variable Interest Entity
Securitized assets	25,800		25,800		23,900
Liquidation losses	0	0	0	0
Mortgage securitizations - Non-agency-sponsored
Variable Interest Entity
Securitized assets	54,500		54,500		40,800
Liquidation losses	5	$ 7	6.6	$ 18
Personal loan
Variable Interest Entity
Securitized assets	200		200
90 days or more past due | Residential mortgages
Variable Interest Entity
Securitized assets	400		400		500
90 days or more past due | Commercial and other
Variable Interest Entity
Securitized assets	0		0		0
90 days or more past due | Mortgage securitizations - Non-agency-sponsored
Variable Interest Entity
Securitized assets	$ 400		$ 400		$ 500

SECURITIZATIONS AND VARIABLE_10

SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Mortgage Servicing Rights (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Mortgage servicing rights
Classification of Securitizations
Fair value of capitalized mortgage servicing rights	$ 419,000,000	$ 345,000,000	$ 419,000,000	$ 345,000,000
Principal amount of loans and other financial instruments	50,000,000,000	57,000,000,000	50,000,000,000	57,000,000,000
Capitalized MSRs
Balance, at beginning of period	433,000,000	367,000,000	336,000,000	495,000,000
Originations	25,000,000	24,000,000	68,000,000	56,000,000
Changes in fair value of MSRs due to changes in inputs and assumptions	(21,000,000)	(26,000,000)	52,000,000	(169,000,000)
Other changes	(18,000,000)	(20,000,000)	(37,000,000)	(37,000,000)
Sale of MSRs	0	0	0	0
Balance, as of June 30	419,000,000	345,000,000	419,000,000	345,000,000
MSR fees
Servicing fees	37,000,000	34,000,000	68,000,000	73,000,000
Late fees	0	1,000,000	1,000,000	3,000,000
Ancillary fees	0	0	0	0
Total MSR fees	37,000,000	35,000,000	69,000,000	76,000,000
Mortgage securitizations - Non-agency-sponsored
Re-securitizations
Fair value of re-securitizations deals in which the entity holds a retained interest	0		0		$ 0
Mortgage securitizations - U.S. agency-sponsored
Re-securitizations
Fair value of re-securitizations deals in which the entity holds a retained interest	1,200,000,000		1,200,000,000		1,600,000,000
Securities transferred to re-securitization entities	11,400,000,000	$ 12,000,000,000	24,500,000,000	$ 19,400,000,000
Market value of retained interest related to re-securitization transaction	410,000,000		410,000,000		916,000,000
Original fair value of re-securitizations deals in which the entity holds a retained interest	$ 76,000,000,000		$ 76,000,000,000		$ 83,600,000,000

SECURITIZATIONS AND VARIABLE_11

SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Asset-Backed Commercial Paper Conduits (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Classification of Other Securitization Details
Commercial paper	$ 18,666,000,000	$ 18,010,000,000
Citi-administered asset-backed commercial paper conduits
Classification of Other Securitization Details
Purchased assets outstanding under conduits	14,600,000,000	16,700,000,000
Incremental funding commitments with clients	$ 20,000,000,000	$ 17,100,000,000
Weighted average life of commercial paper issued by conduits	52 days	54 days
Citi-administered asset-backed commercial paper conduits | Minimum
Classification of Other Securitization Details
Letters of credit as percentage of conduit assets	8.00%
Floor price of conduit's assets	$ 200,000,000
Citi-administered asset-backed commercial paper conduits | Maximum
Classification of Other Securitization Details
Letters of credit as percentage of conduit assets	10.00%
Citi-administered asset-backed consolidated commercial paper conduits (ABCP)
Classification of Other Securitization Details
Letters of credit provided to conduits	$ 1,300,000,000	$ 1,500,000,000
Commercial paper	$ 5,600,000,000	$ 6,600,000,000

SECURITIZATIONS AND VARIABLE_12

SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Collateralized Loan Obligations (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Collateralized loan obligations (CLOs)
Variable Interest Entity
Carrying value of retained interests	$ 1,574	$ 1,611

SECURITIZATIONS AND VARIABLE_13

SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Asset Based Financing (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Variable Interest Entity
Total unconsolidated VIE assets	$ 455,715	$ 425,355
Maximum exposure to unconsolidated VIEs	60,324	56,125
Commercial and other real estate | Asset-based financing
Variable Interest Entity
Total unconsolidated VIE assets	33,341	34,570
Maximum exposure to unconsolidated VIEs	7,073	7,758
Corporate loans | Asset-based financing
Variable Interest Entity
Total unconsolidated VIE assets	15,963	12,022
Maximum exposure to unconsolidated VIEs	10,588	7,654
Other (including investment funds, airlines and shipping) | Asset-based financing
Variable Interest Entity
Total unconsolidated VIE assets	198,866	167,613
Maximum exposure to unconsolidated VIEs	22,985	20,442
Asset-based financing
Variable Interest Entity
Total unconsolidated VIE assets	248,170	214,205
Maximum exposure to unconsolidated VIEs	$ 40,646	$ 35,854

SECURITIZATIONS AND VARIABLE_14

SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Municipal Securities Tender Option Bond Trusts (Details) - Municipal securities tender option bond trusts (TOBs) - USD ($) $ in Billions	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Variable Interest Entity
Liquidity agreements, customer TOB trust	$ 1.5	$ 1.6
Notional amount of offsetting reimbursement agreements	0.7	0.8
Liquidity agreements, other trusts	$ 2.5	$ 3.6
Maximum
Variable Interest Entity
The threshold ownership percentage on Residual value of customers TOBs for which the reimbursement agreement applied	25.00%

DERIVATIVES - Derivative Notion

DERIVATIVES - Derivative Notionals (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Hedging instruments under ASC 815
Derivatives
Derivative notionals	$ 395,224	$ 438,164
Hedging instruments under ASC 815 | Interest rate contracts
Derivatives
Derivative notionals	295,160	334,351
Hedging instruments under ASC 815 | Interest rate swaps
Derivatives
Derivative notionals	295,160	334,351
Hedging instruments under ASC 815 | Interest rate futures and forwards
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Interest rate contract options | Written
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Interest rate contract options | Purchased
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Foreign exchange contracts
Derivatives
Derivative notionals	98,135	102,889
Hedging instruments under ASC 815 | Foreign exchange swaps
Derivatives
Derivative notionals	55,575	65,709
Hedging instruments under ASC 815 | Foreign exchange futures, forwards and spot
Derivatives
Derivative notionals	42,510	37,080
Hedging instruments under ASC 815 | Foreign exchange contract options | Written
Derivatives
Derivative notionals	24	47
Hedging instruments under ASC 815 | Foreign exchange contract options | Purchased
Derivatives
Derivative notionals	26	53
Hedging instruments under ASC 815 | Equity contracts
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Equity swaps
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Equity futures and forwards
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Equity contract options | Written
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Equity contract options | Purchased
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Commodity and other contracts
Derivatives
Derivative notionals	1,929	924
Hedging instruments under ASC 815 | Commodity and other swaps
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Commodity and other futures and forwards
Derivatives
Derivative notionals	1,929	924
Hedging instruments under ASC 815 | Commodity and other contracts | Written
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Commodity and other contracts | Purchased
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Credit derivatives
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Credit derivatives | Written
Derivatives
Derivative notionals	0	0
Hedging instruments under ASC 815 | Credit derivatives | Purchased
Derivatives
Derivative notionals	0	0
Other derivative instruments, Trading derivatives
Derivatives
Derivative notionals	42,688,843	39,808,290
Other derivative instruments, Trading derivatives | Interest rate contracts
Derivatives
Derivative notionals	27,081,888	24,858,399
Other derivative instruments, Trading derivatives | Interest rate swaps
Derivatives
Derivative notionals	19,629,538	17,724,147
Other derivative instruments, Trading derivatives | Interest rate futures and forwards
Derivatives
Derivative notionals	4,381,531	4,142,514
Other derivative instruments, Trading derivatives | Interest rate contract options | Written
Derivatives
Derivative notionals	1,598,478	1,573,483
Other derivative instruments, Trading derivatives | Interest rate contract options | Purchased
Derivatives
Derivative notionals	1,472,341	1,418,255
Other derivative instruments, Trading derivatives | Foreign exchange contracts
Derivatives
Derivative notionals	12,668,170	12,320,659
Other derivative instruments, Trading derivatives | Foreign exchange swaps
Derivatives
Derivative notionals	6,495,324	6,567,304
Other derivative instruments, Trading derivatives | Foreign exchange futures, forwards and spot
Derivatives
Derivative notionals	4,586,090	3,945,391
Other derivative instruments, Trading derivatives | Foreign exchange contract options | Written
Derivatives
Derivative notionals	796,584	907,338
Other derivative instruments, Trading derivatives | Foreign exchange contract options | Purchased
Derivatives
Derivative notionals	790,172	900,626
Other derivative instruments, Trading derivatives | Equity contracts
Derivatives
Derivative notionals	1,350,747	1,110,328
Other derivative instruments, Trading derivatives | Equity swaps
Derivatives
Derivative notionals	306,856	274,098
Other derivative instruments, Trading derivatives | Equity futures and forwards
Derivatives
Derivative notionals	82,175	67,025
Other derivative instruments, Trading derivatives | Equity contract options | Written
Derivatives
Derivative notionals	525,671	441,003
Other derivative instruments, Trading derivatives | Equity contract options | Purchased
Derivatives
Derivative notionals	436,045	328,202
Other derivative instruments, Trading derivatives | Commodity and other contracts
Derivatives
Derivative notionals	391,691	362,527
Other derivative instruments, Trading derivatives | Commodity and other swaps
Derivatives
Derivative notionals	90,785	80,127
Other derivative instruments, Trading derivatives | Commodity and other futures and forwards
Derivatives
Derivative notionals	168,072	143,175
Other derivative instruments, Trading derivatives | Commodity and other contracts | Written
Derivatives
Derivative notionals	68,024	71,376
Other derivative instruments, Trading derivatives | Commodity and other contracts | Purchased
Derivatives
Derivative notionals	64,810	67,849
Other derivative instruments, Trading derivatives | Credit derivatives
Derivatives
Derivative notionals	1,196,347	1,156,377
Other derivative instruments, Trading derivatives | Credit derivatives | Written
Derivatives
Derivative notionals	563,906	543,607
Other derivative instruments, Trading derivatives | Credit derivatives | Purchased
Derivatives
Derivative notionals	632,441	612,770
Rule Changes Adopted by Clearing Organizations
Derivatives
Reduction in derivative receivables	$ 275,000	$ 280,000

DERIVATIVES - Derivative Mark-t

DERIVATIVES - Derivative Mark-to-Market (MTM) Receivables/Payables (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Assets
Less: Netting of cash collateral received	$ (43,554)	$ (63,915)
Liabilities
Less: Netting of cash collateral paid	(48,079)	(45,628)
Trading account assets
Assets
Derivative receivables	388,112	472,977
Cash collateral paid, net of amount used to offset derivative liabilities	22,104	32,778
Less: Netting agreements to assets	(293,047)	(364,879)
Less: Netting of cash collateral received	(43,554)	(63,915)
Total trading account derivatives, assets	73,615	76,961
Less: Cash collateral received	(982)	(1,567)
Less: Non-cash collateral received	(6,800)	(7,408)
Total Net receivables	65,833	67,986
Liabilities
Cash collateral paid, gross	70,183	78,406
Does not meet applicable offsetting guidance, assets	12,000	6,000
Trading account assets | Over-the-counter
Liabilities
Less: Netting agreements to liabilities	(262,000)	(336,000)
Trading account assets | Cleared
Liabilities
Less: Netting agreements to liabilities	(12,000)	(9,000)
Trading account assets | Exchange traded
Liabilities
Less: Netting agreements to liabilities	(19,000)	(20,000)
Trading accounts liabilities
Liabilities
Derivative payables	384,066	470,268
Cash collateral received, net of amount used to offset derivative assets	17,965	8,196
Less: Netting agreements to liabilities	(293,047)	(364,879)
Less: Netting of cash collateral paid	(48,079)	(45,628)
Total derivative liabilities	60,905	67,957
Less: Cash collateral paid	(1,586)	(473)
Less: Non-cash collateral paid	(13,639)	(13,087)
Total Net payables	45,680	54,397
Cash collateral received, gross	61,519	72,111
Does not meet applicable offsetting guidance, liabilities	13,000	8,000
Trading accounts liabilities | Over-the-counter
Assets
Less: Netting agreements to assets	(262,000)	(336,000)
Trading accounts liabilities | Cleared
Assets
Less: Netting agreements to assets	(12,000)	(9,000)
Trading accounts liabilities | Exchange traded
Assets
Less: Netting agreements to assets	(19,000)	(20,000)
Derivative instruments designated as ASC 815 hedges | Trading account assets
Assets
Derivative receivables	2,298	3,892
Derivative instruments designated as ASC 815 hedges | Trading accounts liabilities
Liabilities
Derivative payables	1,531	2,522
Derivative instruments designated as ASC 815 hedges | Interest rate contracts | Trading account assets
Assets
Derivative receivables	1,419	1,855
Derivative instruments designated as ASC 815 hedges | Interest rate contracts | Trading account assets | Over-the-counter
Assets
Derivative receivables	1,331	1,781
Derivative instruments designated as ASC 815 hedges | Interest rate contracts | Trading account assets | Cleared
Assets
Derivative receivables	88	74
Derivative instruments designated as ASC 815 hedges | Interest rate contracts | Trading accounts liabilities
Liabilities
Derivative payables	186	480
Derivative instruments designated as ASC 815 hedges | Interest rate contracts | Trading accounts liabilities | Over-the-counter
Liabilities
Derivative payables	38	161
Derivative instruments designated as ASC 815 hedges | Interest rate contracts | Trading accounts liabilities | Cleared
Liabilities
Derivative payables	148	319
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts | Trading account assets
Assets
Derivative receivables	879	2,037
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts | Trading account assets | Over-the-counter
Assets
Derivative receivables	879	2,037
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts | Trading account assets | Cleared
Assets
Derivative receivables	0
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts | Trading accounts liabilities
Liabilities
Derivative payables	1,345	2,042
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts | Trading accounts liabilities | Over-the-counter
Liabilities
Derivative payables	1,342	2,042
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts | Trading accounts liabilities | Cleared
Liabilities
Derivative payables	3
Derivatives instruments not designated as ASC 815 hedges | Trading account assets
Assets
Derivative receivables	385,814	469,085
Derivatives instruments not designated as ASC 815 hedges | Trading accounts liabilities
Liabilities
Derivative payables	382,535	467,746
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Trading account assets
Assets
Derivative receivables	184,558	239,606
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Trading account assets | Over-the-counter
Assets
Derivative receivables	172,044	228,519
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Trading account assets | Cleared
Assets
Derivative receivables	12,425	11,041
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Trading account assets | Exchange traded
Assets
Derivative receivables	89	46
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Trading accounts liabilities
Liabilities
Derivative payables	168,555	221,931
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Trading accounts liabilities | Over-the-counter
Liabilities
Derivative payables	157,764	209,330
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Trading accounts liabilities | Cleared
Liabilities
Derivative payables	10,770	12,563
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Trading accounts liabilities | Exchange traded
Liabilities
Derivative payables	21	38
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading account assets
Assets
Derivative receivables	117,692	154,633
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading account assets | Over-the-counter
Assets
Derivative receivables	117,330	153,791
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading account assets | Cleared
Assets
Derivative receivables	362	842
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading account assets | Exchange traded
Assets
Derivative receivables		0
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading accounts liabilities
Liabilities
Derivative payables	115,390	154,024
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading accounts liabilities | Over-the-counter
Liabilities
Derivative payables	115,100	152,784
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading accounts liabilities | Cleared
Liabilities
Derivative payables	290	1,239
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading accounts liabilities | Exchange traded
Liabilities
Derivative payables		1
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Trading account assets
Assets
Derivative receivables	48,515	50,519
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Trading account assets | Over-the-counter
Assets
Derivative receivables	28,687	29,244
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Trading account assets | Cleared
Assets
Derivative receivables	0	1
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Trading account assets | Exchange traded
Assets
Derivative receivables	19,828	21,274
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Trading accounts liabilities
Liabilities
Derivative payables	59,927	63,569
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Trading accounts liabilities | Over-the-counter
Liabilities
Derivative payables	40,156	41,036
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Trading accounts liabilities | Cleared
Liabilities
Derivative payables	1	18
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Trading accounts liabilities | Exchange traded
Liabilities
Derivative payables	19,770	22,515
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts | Trading account assets
Assets
Derivative receivables	25,197	14,538
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts | Trading account assets | Over-the-counter
Assets
Derivative receivables	23,419	13,659
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts | Trading account assets | Exchange traded
Assets
Derivative receivables	1,778	879
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts | Trading accounts liabilities
Liabilities
Derivative payables	28,186	18,093
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts | Trading accounts liabilities | Over-the-counter
Liabilities
Derivative payables	25,917	17,076
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts | Trading accounts liabilities | Exchange traded
Liabilities
Derivative payables	2,269	1,017
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives | Trading account assets
Assets
Derivative receivables	9,852	9,789
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives | Trading account assets | Over-the-counter
Assets
Derivative receivables	7,108	7,826
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives | Trading account assets | Cleared
Assets
Derivative receivables	2,744	1,963
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives | Trading accounts liabilities
Liabilities
Derivative payables	10,477	10,129
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives | Trading accounts liabilities | Over-the-counter
Liabilities
Derivative payables	7,206	7,951
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives | Trading accounts liabilities | Cleared
Liabilities
Derivative payables	$ 3,271	$ 2,178

DERIVATIVES - Gains (Losses) In

DERIVATIVES - Gains (Losses) Included in Other Revenue (Details) - Other revenue - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Derivative gain (losses)
Gains (losses) recognized in Other revenue related to derivatives not designated in a qualifying hedging relationship	$ (28)	$ (42)	$ (109)	$ 137
Interest rate contracts
Derivative gain (losses)
Gains (losses) recognized in Other revenue related to derivatives not designated in a qualifying hedging relationship	(15)	19	(75)	174
Foreign exchange contracts
Derivative gain (losses)
Gains (losses) recognized in Other revenue related to derivatives not designated in a qualifying hedging relationship	$ (13)	$ (61)	$ (34)	$ (37)

DERIVATIVES - Fair Value Hedges

DERIVATIVES - Fair Value Hedges (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Other revenue
Gain (loss) on fair value hedges
Gain (loss) on the hedging derivatives included in assessment of the effectiveness of fair value hedges	$ (57)	$ 53	$ (556)	$ (1,568)
Gain (loss) on the hedged item in designated and qualifying fair value hedges	57	(53)	556	1,568
Net gain (loss) on the hedging derivatives excluded from assessment of the effectiveness of fair value hedges	(40)	32	(58)	(51)
Net interest revenue
Gain (loss) on fair value hedges
Gain (loss) on the hedging derivatives included in assessment of the effectiveness of fair value hedges	454	239	(3,481)	7,086
Gain (loss) on the hedged item in designated and qualifying fair value hedges	(559)	(313)	3,267	(7,128)
Net gain (loss) on the hedging derivatives excluded from assessment of the effectiveness of fair value hedges	1	(18)	(3)	(23)
Interest rate contracts (gross) | Other revenue
Gain (loss) on fair value hedges
Gain (loss) on the hedging derivatives included in assessment of the effectiveness of fair value hedges	0	0	0	0
Gain (loss) on the hedged item in designated and qualifying fair value hedges	0	0	0	0
Net gain (loss) on the hedging derivatives excluded from assessment of the effectiveness of fair value hedges	0	0	0	0
Interest rate contracts (gross) | Net interest revenue
Gain (loss) on fair value hedges
Gain (loss) on the hedging derivatives included in assessment of the effectiveness of fair value hedges	454	239	(3,481)	7,086
Gain (loss) on the hedged item in designated and qualifying fair value hedges	(559)	(313)	3,267	(7,128)
Net gain (loss) on the hedging derivatives excluded from assessment of the effectiveness of fair value hedges	1	(18)	(3)	(23)
Foreign exchange contracts (gross)
Gain (loss) on fair value hedges
Amount of cross currency basis included in AOCI	(13)	16	(26)	49
Foreign exchange contracts (gross) | Other revenue
Gain (loss) on fair value hedges
Gain (loss) on the hedging derivatives included in assessment of the effectiveness of fair value hedges	220	434	10	(1,477)
Gain (loss) on the hedged item in designated and qualifying fair value hedges	(220)	(434)	(10)	1,477
Net gain (loss) on the hedging derivatives excluded from assessment of the effectiveness of fair value hedges	13	17	17	(41)
Foreign exchange contracts (gross) | Net interest revenue
Gain (loss) on fair value hedges
Gain (loss) on the hedging derivatives included in assessment of the effectiveness of fair value hedges	0	0	0	0
Gain (loss) on the hedged item in designated and qualifying fair value hedges	0	0	0	0
Net gain (loss) on the hedging derivatives excluded from assessment of the effectiveness of fair value hedges	0	0	0	0
Commodity hedges | Other revenue
Gain (loss) on fair value hedges
Gain (loss) on the hedging derivatives included in assessment of the effectiveness of fair value hedges	(277)	(381)	(566)	(91)
Gain (loss) on the hedged item in designated and qualifying fair value hedges	277	381	566	91
Net gain (loss) on the hedging derivatives excluded from assessment of the effectiveness of fair value hedges	(53)	15	(75)	(10)
Commodity hedges | Net interest revenue
Gain (loss) on fair value hedges
Gain (loss) on the hedging derivatives included in assessment of the effectiveness of fair value hedges	0	0	0	0
Gain (loss) on the hedged item in designated and qualifying fair value hedges	0	0	0	0
Net gain (loss) on the hedging derivatives excluded from assessment of the effectiveness of fair value hedges	$ 0	$ 0	$ 0	$ 0

DERIVATIVES - Cumulative Basis

DERIVATIVES - Cumulative Basis Adjustment (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Debt securities AFS, carrying amount of hedged asset/liability	$ 78,108	$ 81,082
Debt securities AFS, cumulative fair value hedging adjustment included in the carrying amount, active	59	28
Debt securities AFS, cumulative fair value hedging adjustment included in the carrying amount, de-designated	126	342
Long-term debt, carrying amount of hedged asset/liability	159,712	169,026
Long-term debt, cumulative fair value hedging adjustment included in the carrying amount, active	2,563	5,554
Long-term debt, cumulative fair value hedging adjustment included in the carrying amount, de-designated	4,177	4,989
Cumulative basis adjustment within active hedges	111	(18)
Cumulative basis adjustment within de-designated hedges	(131)	62
Amount of designated hedged items	7,000	3,000
Amortized cost basis of closed portfolios used in hedging relations	$ 33,000	$ 19,000

DERIVATIVES - Cash Flow Hedges

DERIVATIVES - Cash Flow Hedges (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Pretax change in accumulated other comprehensive income (loss)
Amount of gain (loss) recognized in AOCI on derivative	$ 36	$ 289	$ (416)	$ 2,775
Net pretax change in cash flow hedges included within AOCI	(229)	90	(958)	2,574
Cash flow hedge gain expected to be reclassified from AOCI within 12 months			$ 1,000
Maximum length of time hedged in cash flow hedge			10 years
Interest rate contracts
Pretax change in accumulated other comprehensive income (loss)
Amount of gain (loss) recognized in AOCI on derivative	39	294	$ (416)	2,791
Foreign exchange contracts
Pretax change in accumulated other comprehensive income (loss)
Amount of gain (loss) recognized in AOCI on derivative	(3)	(5)	0	(16)
Other revenue
Pretax change in accumulated other comprehensive income (loss)
Amount of gain (loss) reclassified from AOCI to earnings	(1)	(1)	(2)	(2)
Other revenue | Interest rate contracts
Pretax change in accumulated other comprehensive income (loss)
Amount of gain (loss) reclassified from AOCI to earnings	0	0	0	0
Other revenue | Foreign exchange contracts
Pretax change in accumulated other comprehensive income (loss)
Amount of gain (loss) reclassified from AOCI to earnings	(1)	(1)	(2)	(2)
Net interest revenue
Pretax change in accumulated other comprehensive income (loss)
Amount of gain (loss) reclassified from AOCI to earnings	266	200	544	203
Net interest revenue | Interest rate contracts
Pretax change in accumulated other comprehensive income (loss)
Amount of gain (loss) reclassified from AOCI to earnings	266	200	544	203
Net interest revenue | Foreign exchange contracts
Pretax change in accumulated other comprehensive income (loss)
Amount of gain (loss) reclassified from AOCI to earnings	$ 0	$ 0	$ 0	$ 0

DERIVATIVES - Net Investment He

DERIVATIVES - Net Investment Hedges (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net investment hedges | Foreign currency translation adjustment
Derivative gain (losses)
Gain (loss) recognized in AOCI	$ (426)	$ (741)	$ 131	$ 1,419

DERIVATIVES - Credit Derivative

DERIVATIVES - Credit Derivatives (Details) $ in Millions	6 Months Ended
	Jun. 30, 2021USD ($)agency	Dec. 31, 2020USD ($)
Credit Risk Derivatives
Fair values, receivable	$ 9,852	$ 9,789
Fair values, payable	10,477	10,129
Notionals, protection purchased	632,441	612,770
Notionals, protection sold	563,906	543,607
Fair value of derivative in liability position	21,000	25,000
Fair value of collateral already posted	$ 19,000	22,000
Number of rating agencies | agency	3
Additional collateral to be posted	$ 1,200
Collateral to be segregated	200
Aggregate cash obligations and collateral requirements	1,400
Purchased
Credit Risk Derivatives
Fair values, receivable	3,376	3,514
Fair values, payable	7,228	7,037
Sold
Credit Risk Derivatives
Fair values, receivable	6,476	6,275
Fair values, payable	3,249	3,092
Within 1 year
Credit Risk Derivatives
Fair values, receivable	937	914
Fair values, payable	1,479	1,355
Notionals, protection purchased	132,426	134,080
Notionals, protection sold	123,092	125,464
From 1 to 5 years
Credit Risk Derivatives
Fair values, receivable	6,157	6,022
Fair values, payable	6,323	5,991
Notionals, protection purchased	441,620	421,682
Notionals, protection sold	396,219	374,376
After 5 years
Credit Risk Derivatives
Fair values, receivable	2,758	2,853
Fair values, payable	2,675	2,783
Notionals, protection purchased	58,395	57,008
Notionals, protection sold	44,595	43,767
Investment grade
Credit Risk Derivatives
Fair values, receivable	4,192	4,136
Fair values, payable	4,036	4,037
Notionals, protection purchased	477,097	478,643
Notionals, protection sold	421,549	418,147
Non-investment grade
Credit Risk Derivatives
Fair values, receivable	5,660	5,653
Fair values, payable	6,441	6,092
Notionals, protection purchased	155,344	134,127
Notionals, protection sold	142,357	125,460
Credit default swaps and options
Credit Risk Derivatives
Fair values, receivable	9,170	9,254
Fair values, payable	9,784	9,254
Notionals, protection purchased	615,504	599,633
Notionals, protection sold	556,760	538,426
Total return swaps and other
Credit Risk Derivatives
Fair values, receivable	682	535
Fair values, payable	693	875
Notionals, protection purchased	16,937	13,137
Notionals, protection sold	7,146	5,181
Banks
Credit Risk Derivatives
Fair values, receivable	2,498	2,902
Fair values, payable	3,167	3,187
Notionals, protection purchased	107,848	117,685
Notionals, protection sold	103,288	120,739
Broker-dealers
Credit Risk Derivatives
Fair values, receivable	1,817	1,770
Fair values, payable	1,124	1,215
Notionals, protection purchased	45,629	46,928
Notionals, protection sold	41,188	44,692
Non-financial
Credit Risk Derivatives
Fair values, receivable	119	109
Fair values, payable	79	90
Notionals, protection purchased	6,089	5,740
Notionals, protection sold	2,774	2,217
Insurance and other financial institutions
Credit Risk Derivatives
Fair values, receivable	5,418	5,008
Fair values, payable	6,107	5,637
Notionals, protection purchased	472,875	442,417
Notionals, protection sold	416,656	375,959
Interest rate swaps
Credit Risk Derivatives
Cash proceeds received for assets derecognized	3,900	2,000
Fair value of derecognized assets	3,900	2,200
Fair value gross derivative assets	62	135
Trading derivatives, liability	$ 21	$ 7

FAIR VALUE MEASUREMENT - Market

FAIR VALUE MEASUREMENT - Market Valuation Adjustments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Credit and funding valuation adjustments contra-liability (contra-asset)
Counterparty CVA	$ (617)		$ (617)		$ (800)
Asset FVA	(434)		(434)		(525)
Citigroup (own credit) CVA	335		335		403
Liability FVA	78		78		67
Total CVA—derivative instruments	(638)		(638)		$ (855)
Credit, Funding and Debt Valuation Adjustments Gain (Loss) [Abstract]
Counterparty CVA	34	$ 45	43	$ (238)
Asset FVA	25	632	94	(421)
Own credit CVA	(41)	(271)	(78)	262
Liability FVA	(13)	(214)	11	123
Total CVA—derivative instruments	5	192	70	(274)
DVA related to own FVO liabilities	(110)	(2,935)	(148)	1,253
Total CVA and DVA	$ (105)	$ (2,743)	$ (78)	$ 979

FAIR VALUE MEASUREMENT - Items

FAIR VALUE MEASUREMENT - Items Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Assets, Fair Value Disclosure [Abstract]
Federal funds sold and securities borrowed and purchased under agreements to resell, Netting	$ (94,176)	$ (157,370)
Trading account assets	370,950	375,079
Netting of cash collateral received	(43,554)	(63,915)
Investments	487,063	447,359
Loans held at fair value	7,707	6,854
Liabilities, Fair Value Disclosure [Abstract]
Federal funds purchased and securities loaned and sold under agreements to repurchase, Netting	(94,176)	(157,370)
Netting of cash collateral paid	(48,079)	(45,628)
Fair value
Liabilities, Fair Value Disclosure [Abstract]
Investments measured at net asset value excluded from Level 3	147	152
Recurring
Assets, Fair Value Disclosure [Abstract]
Federal funds sold and securities borrowed and purchased under agreements to resell	275,524	335,393
Federal funds sold and securities borrowed and purchased under agreements to resell, Netting	(87,648)	(150,189)
Federal funds sold and securities borrowed and purchased under agreements to resell	187,876	185,204
Investments	303,623	335,998
Loans held at fair value	7,707	6,854
Mortgage servicing rights	419	336
Assets before netting	1,305,907	1,497,067
Netting, Assets, total of netting agreements and cash collateral received	(424,249)	(578,983)
Total assets	881,658	918,084
Liabilities, Fair Value Disclosure [Abstract]
Interest-bearing deposits	2,749	1,958
Federal funds purchased and securities loaned and sold under agreements to repurchase, Gross	157,576	157,275
Federal funds purchased and securities loaned and sold under agreements to repurchase, Netting	(80,871)	(97,069)
Federal funds purchased and securities loaned and sold under agreements to repurchase	76,705	60,206
Securities sold, not yet purchased	113,787	100,044
Trading liabilities	113,801	100,070
Short-term borrowings	7,358	4,683
Long-term debt	76,375	67,063
Total liabilities, Gross	763,169	816,348
Total liabilities, Netting	(421,997)	(507,576)
Total liabilities	341,172	308,772
Recurring | Trading derivatives
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	384,066	470,268
Cash collateral received	17,965	8,196
Total trading derivatives and cash collateral, liability	402,031	478,464
Netting agreements	(293,047)	(364,879)
Netting of cash collateral paid	(48,079)	(45,628)
Netting, Liabilities, total of netting agreements and cash collateral received	(341,126)	(410,507)
Total derivative liabilities	60,905	67,957
Cash collateral received, gross	61,519	72,111
Recurring | Trading derivatives | Interest rate contracts
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	168,741	222,411
Recurring | Trading derivatives | Foreign exchange contracts
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	116,735	156,066
Recurring | Trading derivatives | Equity contracts
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	59,927	63,569
Recurring | Trading derivatives | Commodity contracts
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	28,186	18,093
Recurring | Trading derivatives | Credit derivatives
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	10,477	10,129
Recurring | Non-trading derivatives and other financial liabilities measured on a recurring basis
Liabilities, Fair Value Disclosure [Abstract]
Netting of cash collateral paid		0
Netting, Liabilities, total of netting agreements and cash collateral received
Non-trading derivatives and other financial liabilities measured on a recurring basis, gross	3,279	6,835
Total other assets and cash collateral, gross	3,279	6,835
Recurring | Trading account liabilities
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	14	26
Recurring | Mortgage-backed securities - U.S. government-sponsored agency guaranteed
Assets, Fair Value Disclosure [Abstract]
Trading account assets	32,374	42,930
Investments	39,310	43,918
Recurring | Residential mortgages
Assets, Fair Value Disclosure [Abstract]
Trading account assets	463	731
Investments	404	571
Recurring | Commercial and other
Assets, Fair Value Disclosure [Abstract]
Trading account assets	987	1,029
Investments	43	50
Recurring | Mortgage-backed securities
Assets, Fair Value Disclosure [Abstract]
Trading account assets	33,824	44,690
Investments	39,757	44,539
Recurring | U.S. Treasury and federal agency securities
Assets, Fair Value Disclosure [Abstract]
Trading account assets	63,495	66,798
Investments	126,147	146,204
Recurring | State and municipal
Assets, Fair Value Disclosure [Abstract]
Trading account assets	1,610	1,318
Investments	3,079	3,719
Recurring | Foreign government
Assets, Fair Value Disclosure [Abstract]
Trading account assets	91,072	83,389
Investments	120,217	124,968
Recurring | Corporate
Assets, Fair Value Disclosure [Abstract]
Trading account assets	21,602	20,822
Investments	7,903	10,500
Recurring | Equity securities
Assets, Fair Value Disclosure [Abstract]
Trading account assets	68,326	66,479
Investments	195	515
Recurring | Asset-backed securities
Assets, Fair Value Disclosure [Abstract]
Trading account assets	1,708	2,382
Investments	211	278
Recurring | Other debt securities
Assets, Fair Value Disclosure [Abstract]
Trading account assets	15,698	12,240
Investments	5,663	4,876
Recurring | Non-marketable equity securities measured using the measurement alternative
Assets, Fair Value Disclosure [Abstract]
Investments	451	399
Recurring | Trading non-derivative assets
Assets, Fair Value Disclosure [Abstract]
Trading account assets	297,335	298,118
Recurring | Trading account derivatives
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	388,112	472,977
Cash collateral paid	22,104	32,778
Trading derivative, asset, gross net cash collateral paid	410,216	505,755
Netting agreements	(293,047)	(364,879)
Netting of cash collateral received	(43,554)	(63,915)
Total trading derivatives, netting	(336,601)	(428,794)
Trading derivatives	73,615	76,961
Liabilities, Fair Value Disclosure [Abstract]
Cash collateral paid, gross	70,183	78,406
Recurring | Trading account derivatives | Interest rate contracts
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	185,977	241,461
Recurring | Trading account derivatives | Foreign exchange contracts
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	118,571	156,670
Recurring | Trading account derivatives | Equity contracts
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	48,515	50,519
Recurring | Trading account derivatives | Commodity contracts
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	25,197	14,538
Recurring | Trading account derivatives | Credit derivatives
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	9,852	9,789
Recurring | Non-trading derivatives and other financial assets measured on a recurring basis
Assets, Fair Value Disclosure [Abstract]
Total trading derivatives, netting	0	0
Total other assets and cash collateral, gross	11,083	14,613
Other assets	11,083	14,613
Recurring | Level 1
Assets, Fair Value Disclosure [Abstract]
Federal funds sold and securities borrowed and purchased under agreements to resell	0	0
Investments	197,191	229,701
Loans held at fair value	0	0
Mortgage servicing rights	0	0
Assets before netting	$ 379,311	$ 424,489
Total as a percentage of gross assets	29.50%	29.00%
Liabilities, Fair Value Disclosure [Abstract]
Interest-bearing deposits	$ 0	$ 0
Federal funds purchased and securities loaned and sold under agreements to repurchase, Gross	0	0
Securities sold, not yet purchased	91,879	85,353
Trading liabilities	91,879	85,353
Short-term borrowings	0	0
Long-term debt	0	0
Total liabilities, Gross	$ 95,075	$ 92,196
Total as a percentage of gross liabilities	12.80%	11.40%
Recurring | Level 1 | Trading derivatives
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	$ 44	$ 81
Recurring | Level 1 | Trading derivatives | Interest rate contracts
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	42	25
Recurring | Level 1 | Trading derivatives | Foreign exchange contracts
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	2	3
Recurring | Level 1 | Trading derivatives | Equity contracts
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	0	53
Recurring | Level 1 | Trading derivatives | Commodity contracts
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	0	0
Recurring | Level 1 | Trading derivatives | Credit derivatives
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	0	0
Recurring | Level 1 | Non-trading derivatives and other financial liabilities measured on a recurring basis
Liabilities, Fair Value Disclosure [Abstract]
Other liabilities, gross	3,152	6,762
Recurring | Level 1 | Trading account liabilities
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	0	0
Recurring | Level 1 | Mortgage-backed securities - U.S. government-sponsored agency guaranteed
Assets, Fair Value Disclosure [Abstract]
Trading account assets	0	0
Investments	0	0
Recurring | Level 1 | Residential mortgages
Assets, Fair Value Disclosure [Abstract]
Trading account assets	0	0
Investments	0	0
Recurring | Level 1 | Commercial and other
Assets, Fair Value Disclosure [Abstract]
Trading account assets	0	0
Investments	0	0
Recurring | Level 1 | Mortgage-backed securities
Assets, Fair Value Disclosure [Abstract]
Trading account assets	0	0
Investments	0	0
Recurring | Level 1 | U.S. Treasury and federal agency securities
Assets, Fair Value Disclosure [Abstract]
Trading account assets	60,491	64,529
Investments	126,147	146,032
Recurring | Level 1 | State and municipal
Assets, Fair Value Disclosure [Abstract]
Trading account assets	0	0
Investments	0	0
Recurring | Level 1 | Foreign government
Assets, Fair Value Disclosure [Abstract]
Trading account assets	60,726	68,195
Investments	66,557	77,056
Recurring | Level 1 | Corporate
Assets, Fair Value Disclosure [Abstract]
Trading account assets	1,939	1,607
Investments	4,358	6,326
Recurring | Level 1 | Equity securities
Assets, Fair Value Disclosure [Abstract]
Trading account assets	55,141	54,117
Investments	129	287
Recurring | Level 1 | Asset-backed securities
Assets, Fair Value Disclosure [Abstract]
Trading account assets	0	0
Investments	0	0
Recurring | Level 1 | Other debt securities
Assets, Fair Value Disclosure [Abstract]
Trading account assets	305	0
Investments	0	0
Recurring | Level 1 | Non-marketable equity securities measured using the measurement alternative
Assets, Fair Value Disclosure [Abstract]
Investments	0	0
Recurring | Level 1 | Trading non-derivative assets
Assets, Fair Value Disclosure [Abstract]
Trading account assets	178,602	188,448
Recurring | Level 1 | Trading account derivatives
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	61	110
Recurring | Level 1 | Trading account derivatives | Interest rate contracts
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	61	42
Recurring | Level 1 | Trading account derivatives | Foreign exchange contracts
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	0	2
Recurring | Level 1 | Trading account derivatives | Equity contracts
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	0	66
Recurring | Level 1 | Trading account derivatives | Commodity contracts
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	0	0
Recurring | Level 1 | Trading account derivatives | Credit derivatives
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	0	0
Recurring | Level 1 | Non-trading derivatives and other financial assets measured on a recurring basis
Assets, Fair Value Disclosure [Abstract]
Other assets, gross	3,457	6,230
Recurring | Level 2
Assets, Fair Value Disclosure [Abstract]
Federal funds sold and securities borrowed and purchased under agreements to resell	275,313	335,073
Investments	104,186	104,755
Loans held at fair value	7,278	4,869
Mortgage servicing rights	0	0
Assets before netting	$ 891,525	$ 1,023,665
Total as a percentage of gross assets	69.40%	69.90%
Liabilities, Fair Value Disclosure [Abstract]
Interest-bearing deposits	$ 2,595	$ 1,752
Federal funds purchased and securities loaned and sold under agreements to repurchase, Gross	157,088	156,644
Securities sold, not yet purchased	21,740	14,477
Trading liabilities	21,753	14,477
Short-term borrowings	7,317	4,464
Long-term debt	51,307	41,853
Total liabilities, Gross	$ 616,715	$ 679,937
Total as a percentage of gross liabilities	82.80%	84.10%
Recurring | Level 2 | Trading derivatives
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	$ 376,532	$ 460,675
Recurring | Level 2 | Trading derivatives | Interest rate contracts
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	167,686	220,607
Recurring | Level 2 | Trading derivatives | Foreign exchange contracts
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	115,996	155,441
Recurring | Level 2 | Trading derivatives | Equity contracts
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	55,835	58,212
Recurring | Level 2 | Trading derivatives | Commodity contracts
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	27,437	17,393
Recurring | Level 2 | Trading derivatives | Credit derivatives
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	9,578	9,022
Recurring | Level 2 | Non-trading derivatives and other financial liabilities measured on a recurring basis
Liabilities, Fair Value Disclosure [Abstract]
Other liabilities, gross	123	72
Recurring | Level 2 | Trading account liabilities
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	13	0
Recurring | Level 2 | Mortgage-backed securities - U.S. government-sponsored agency guaranteed
Assets, Fair Value Disclosure [Abstract]
Trading account assets	31,998	42,903
Investments	39,258	43,888
Recurring | Level 2 | Residential mortgages
Assets, Fair Value Disclosure [Abstract]
Trading account assets	368	391
Investments	404	571
Recurring | Level 2 | Commercial and other
Assets, Fair Value Disclosure [Abstract]
Trading account assets	900	893
Investments	43	50
Recurring | Level 2 | Mortgage-backed securities
Assets, Fair Value Disclosure [Abstract]
Trading account assets	33,266	44,187
Investments	39,705	44,509
Recurring | Level 2 | U.S. Treasury and federal agency securities
Assets, Fair Value Disclosure [Abstract]
Trading account assets	3,004	2,269
Investments	0	172
Recurring | Level 2 | State and municipal
Assets, Fair Value Disclosure [Abstract]
Trading account assets	1,540	1,224
Investments	2,331	2,885
Recurring | Level 2 | Foreign government
Assets, Fair Value Disclosure [Abstract]
Trading account assets	30,205	15,143
Investments	52,703	47,644
Recurring | Level 2 | Corporate
Assets, Fair Value Disclosure [Abstract]
Trading account assets	18,840	18,840
Investments	3,441	4,114
Recurring | Level 2 | Equity securities
Assets, Fair Value Disclosure [Abstract]
Trading account assets	13,038	12,289
Investments	66	228
Recurring | Level 2 | Asset-backed securities
Assets, Fair Value Disclosure [Abstract]
Trading account assets	1,016	776
Investments	208	277
Recurring | Level 2 | Other debt securities
Assets, Fair Value Disclosure [Abstract]
Trading account assets	14,838	11,295
Investments	5,663	4,876
Recurring | Level 2 | Non-marketable equity securities measured using the measurement alternative
Assets, Fair Value Disclosure [Abstract]
Investments	69	50
Recurring | Level 2 | Trading non-derivative assets
Assets, Fair Value Disclosure [Abstract]
Trading account assets	115,747	106,023
Recurring | Level 2 | Trading account derivatives
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	381,430	464,562
Recurring | Level 2 | Trading account derivatives | Interest rate contracts
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	183,139	238,026
Recurring | Level 2 | Trading account derivatives | Foreign exchange contracts
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	118,018	155,994
Recurring | Level 2 | Trading account derivatives | Equity contracts
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	46,973	48,362
Recurring | Level 2 | Trading account derivatives | Commodity contracts
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	24,306	13,546
Recurring | Level 2 | Trading account derivatives | Credit derivatives
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	8,994	8,634
Recurring | Level 2 | Non-trading derivatives and other financial assets measured on a recurring basis
Assets, Fair Value Disclosure [Abstract]
Other assets, gross	7,571	8,383
Recurring | Level 3
Assets, Fair Value Disclosure [Abstract]
Federal funds sold and securities borrowed and purchased under agreements to resell	211	320
Investments	2,246	1,542
Loans held at fair value	429	1,985
Mortgage servicing rights	419	336
Assets before netting	$ 12,967	$ 16,135
Total as a percentage of gross assets	1.00%	1.10%
Liabilities, Fair Value Disclosure [Abstract]
Interest-bearing deposits	$ 154	$ 206
Federal funds purchased and securities loaned and sold under agreements to repurchase, Gross	488	631
Securities sold, not yet purchased	168	214
Trading liabilities	169	240
Short-term borrowings	41	219
Long-term debt	25,068	25,210
Total liabilities, Gross	$ 33,414	$ 36,019
Total as a percentage of gross liabilities	4.50%	4.50%
Recurring | Level 3 | Trading derivatives
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	$ 7,490	$ 9,512
Recurring | Level 3 | Trading derivatives | Interest rate contracts
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	1,013	1,779
Recurring | Level 3 | Trading derivatives | Foreign exchange contracts
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	737	622
Recurring | Level 3 | Trading derivatives | Equity contracts
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	4,092	5,304
Recurring | Level 3 | Trading derivatives | Commodity contracts
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	749	700
Recurring | Level 3 | Trading derivatives | Credit derivatives
Liabilities, Fair Value Disclosure [Abstract]
Trading derivatives, liability	899	1,107
Recurring | Level 3 | Non-trading derivatives and other financial liabilities measured on a recurring basis
Liabilities, Fair Value Disclosure [Abstract]
Other liabilities, gross	4	1
Recurring | Level 3 | Trading account liabilities
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	1	26
Recurring | Level 3 | Mortgage-backed securities - U.S. government-sponsored agency guaranteed
Assets, Fair Value Disclosure [Abstract]
Trading account assets	376	27
Investments	52	30
Recurring | Level 3 | Residential mortgages
Assets, Fair Value Disclosure [Abstract]
Trading account assets	95	340
Investments	0	0
Recurring | Level 3 | Commercial and other
Assets, Fair Value Disclosure [Abstract]
Trading account assets	87	136
Investments	0	0
Recurring | Level 3 | Mortgage-backed securities
Assets, Fair Value Disclosure [Abstract]
Trading account assets	558	503
Investments	52	30
Recurring | Level 3 | U.S. Treasury and federal agency securities
Assets, Fair Value Disclosure [Abstract]
Trading account assets	0	0
Investments	0	0
Recurring | Level 3 | State and municipal
Assets, Fair Value Disclosure [Abstract]
Trading account assets	70	94
Investments	748	834
Recurring | Level 3 | Foreign government
Assets, Fair Value Disclosure [Abstract]
Trading account assets	141	51
Investments	957	268
Recurring | Level 3 | Corporate
Assets, Fair Value Disclosure [Abstract]
Trading account assets	823	375
Investments	104	60
Recurring | Level 3 | Equity securities
Assets, Fair Value Disclosure [Abstract]
Trading account assets	147	73
Investments	0	0
Recurring | Level 3 | Asset-backed securities
Assets, Fair Value Disclosure [Abstract]
Trading account assets	692	1,606
Investments	3	1
Recurring | Level 3 | Other debt securities
Assets, Fair Value Disclosure [Abstract]
Trading account assets	555	945
Investments	0	0
Recurring | Level 3 | Non-marketable equity securities measured using the measurement alternative
Assets, Fair Value Disclosure [Abstract]
Investments	382	349
Recurring | Level 3 | Trading non-derivative assets
Assets, Fair Value Disclosure [Abstract]
Trading account assets	2,986	3,647
Recurring | Level 3 | Trading account derivatives
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	6,621	8,305
Recurring | Level 3 | Trading account derivatives | Interest rate contracts
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	2,777	3,393
Recurring | Level 3 | Trading account derivatives | Foreign exchange contracts
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	553	674
Recurring | Level 3 | Trading account derivatives | Equity contracts
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	1,542	2,091
Recurring | Level 3 | Trading account derivatives | Commodity contracts
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	891	992
Recurring | Level 3 | Trading account derivatives | Credit derivatives
Assets, Fair Value Disclosure [Abstract]
Trading derivatives, asset, Gross	858	1,155
Recurring | Level 3 | Non-trading derivatives and other financial assets measured on a recurring basis
Assets, Fair Value Disclosure [Abstract]
Other assets, gross	$ 55	$ 0

FAIR VALUE MEASUREMENT - Level

FAIR VALUE MEASUREMENT - Level 3 Fair Value Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Trading account assets and liabilities
Fair value, Derivative assets (liabilities) measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset (liability), net	$ (930)	$ 195	$ (1,207)	$ (1,715)
Net realized/unrealized gains (losses) included in principal transactions	421	(481)	664	132
Other	0	0	0	0
Transfers into Level 3	(616)	135	(392)	1,398
Transfers out of Level 3	531	(52)	535	(183)
Purchases	226	47	339	141
Issuances	0	0	(84)	56
Sales	(421)	(20)	(569)	(50)
Settlements	(80)	7	(155)	52
Balance at end of period, asset (liability), net	(869)	(169)	(869)	(169)
Unrealized gains (losses) still held	(50)	(515)	41	(11)
Trading account assets and liabilities | Interest rate contracts
Fair value, Derivative assets (liabilities) measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset (liability), net	1,229	1,755	1,614	1
Net realized/unrealized gains (losses) included in principal transactions	(126)	24	(298)	375
Other	0	0	0	0
Transfers into Level 3	218	231	173	1,614
Transfers out of Level 3	321	20	321	(2)
Purchases	2	1	2	2
Issuances	0	0	(84)	56
Sales	0	0	0	13
Settlements	120	(63)	36	(91)
Balance at end of period, asset (liability), net	1,764	1,968	1,764	1,968
Unrealized gains (losses) still held	(70)	7	(197)	387
Trading account assets and liabilities | Foreign exchange contracts
Fair value, Derivative assets (liabilities) measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset (liability), net	(86)	2	52	(5)
Net realized/unrealized gains (losses) included in principal transactions	59	(37)	(79)	(52)
Other	0	0	0	0
Transfers into Level 3	0	(8)	8	(33)
Transfers out of Level 3	4	2	4	11
Purchases	111	5	134	49
Issuances	0	0	0	0
Sales	(282)	(5)	(297)	(13)
Settlements	10	15	(6)	17
Balance at end of period, asset (liability), net	(184)	(26)	(184)	(26)
Unrealized gains (losses) still held	(28)	(47)	(57)	104
Trading account assets and liabilities | Equity contracts
Fair value, Derivative assets (liabilities) measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset (liability), net	(2,876)	(1,836)	(3,213)	(1,596)
Net realized/unrealized gains (losses) included in principal transactions	309	(354)	612	(564)
Other	0	0	0	0
Transfers into Level 3	(634)	(104)	(598)	(391)
Transfers out of Level 3	892	12	898	236
Purchases	85	21	109	24
Issuances	0	0	0	0
Sales	(94)	(5)	(117)	(6)
Settlements	(232)	31	(241)	62
Balance at end of period, asset (liability), net	(2,550)	(2,235)	(2,550)	(2,235)
Unrealized gains (losses) still held	349	(349)	213	(663)
Trading account assets and liabilities | Commodity contracts
Fair value, Derivative assets (liabilities) measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset (liability), net	732	(542)	292	(59)
Net realized/unrealized gains (losses) included in principal transactions	236	253	550	(206)
Other	0	0	0	0
Transfers into Level 3	(148)	(1)	10	37
Transfers out of Level 3	(612)	(14)	(617)	(70)
Purchases	28	20	94	66
Issuances	0	0	0	0
Sales	(45)	(10)	(155)	(44)
Settlements	(49)	16	(32)	(2)
Balance at end of period, asset (liability), net	142	(278)	142	(278)
Unrealized gains (losses) still held	(194)	241	280	(211)
Trading account assets and liabilities | Credit derivatives
Fair value, Derivative assets (liabilities) measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset (liability), net	71	816	48	(56)
Net realized/unrealized gains (losses) included in principal transactions	(57)	(367)	(121)	579
Other	0	0	0	0
Transfers into Level 3	(52)	17	15	171
Transfers out of Level 3	(74)	(72)	(71)	(358)
Purchases	0	0	0	0
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	71	8	88	66
Balance at end of period, asset (liability), net	(41)	402	(41)	402
Unrealized gains (losses) still held	(107)	(367)	(198)	372
Interest-bearing deposits
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	199	491	206	215
Net realized/unrealized gains (losses) included in principal transactions, liabilities	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	2	(5)	18	(11)
Transfers into Level 3, liabilities	0	0	0	278
Transfers out of Level 3, liabilities	(44)	(151)	(44)	(151)
Purchases, liability	0	0	0	0
Issuance, liability	11	30	20	30
Sales, liability	0	0	0	0
Settlements, liability	(10)	(138)	(10)	(146)
Balance at end of period, liability	154	237	154	237
Unrealized gains (losses) still held, liabilities	0	(27)	(45)	(6)
Securities loaned and sold under agreements to repurchase
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	977	730	631	757
Net realized/unrealized gains (losses) included in principal transactions, liabilities	22	0	7	27
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	0	0	0	0
Transfers out of Level 3, liabilities	(483)	0	(483)	0
Purchases, liability	80	0	488	0
Issuance, liability	0	0	0	0
Sales, liability	0	0	0	0
Settlements, liability	(64)	(105)	(141)	(105)
Balance at end of period, liability	488	625	488	625
Unrealized gains (losses) still held, liabilities	0	0	19	(33)
Trading account liabilities | Securities sold, not yet purchased
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	167	200	214	48
Net realized/unrealized gains (losses) included in principal transactions, liabilities	7	(28)	61	(129)
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	54	43	62	117
Transfers out of Level 3, liabilities	(21)	(8)	(25)	(18)
Purchases, liability	10	0	20	0
Issuance, liability	0	0	0	9
Sales, liability	0	0	0	0
Settlements, liability	(35)	(159)	(42)	(181)
Balance at end of period, liability	168	104	168	104
Unrealized gains (losses) still held, liabilities	26	24	(2)	(7)
Trading account liabilities | Other trading liabilities
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	6	0	26	0
Net realized/unrealized gains (losses) included in principal transactions, liabilities	5	0	25	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	0	0	0	0
Transfers out of Level 3, liabilities	0	0	0	0
Purchases, liability	0	0	0	0
Issuance, liability	0	0	0	0
Sales, liability	0	0	0	0
Settlements, liability	0	0	0	0
Balance at end of period, liability	1	0	1	0
Unrealized gains (losses) still held, liabilities	4	0	0	0
Short-term borrowings
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	49	52	219	13
Net realized/unrealized gains (losses) included in principal transactions, liabilities	33	9	32	19
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	40	75	42	86
Transfers out of Level 3, liabilities	(32)	(6)	(44)	(6)
Purchases, liability	0	0	0	0
Issuance, liability	17	23	25	61
Sales, liability	0	0	0	0
Settlements, liability	0	(7)	(169)	(7)
Balance at end of period, liability	41	128	41	128
Unrealized gains (losses) still held, liabilities	17	16	17	21
Long-term debt
Fair value, Derivative assets (liabilities) measured on recurring basis, level 3 fair-value category reconciliation
Transfers out of Level 3	6,000	(1,500)	6,000	(4,200)
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	26,337	19,269	25,210	17,169
Net realized/unrealized gains (losses) included in principal transactions, liabilities	(849)	(1,691)	1,773	(380)
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	3,937	1,875	4,869	5,063
Transfers out of Level 3, liabilities	(5,966)	(1,475)	(5,968)	(4,168)
Purchases, liability	0	0	0	0
Issuance, liability	1,825	2,527	7,545	6,788
Sales, liability	0	0	0	0
Settlements, liability	(1,914)	(2,254)	(4,815)	(3,600)
Balance at end of period, liability	25,068	21,633	25,068	21,633
Unrealized gains (losses) still held, liabilities	(699)	(1,518)	791	(746)
Other financial liabilities
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	8	0	1	0
Net realized/unrealized gains (losses) included in principal transactions, liabilities	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	(3)	0
Transfers into Level 3, liabilities	0	0	0	0
Transfers out of Level 3, liabilities	(4)	0	(4)	0
Purchases, liability	0	0	0	0
Issuance, liability	0	0	14	2
Sales, liability		0	0	0
Settlements, liability	0	0	(10)	(2)
Balance at end of period, liability	4	0	4	0
Unrealized gains (losses) still held, liabilities	0	0	0	0
Securities borrowed and purchased under agreements to resell
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	262	300	320	303
Net realized/unrealized gains (losses) included in principal transactions	(2)	34	(11)	14
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3, assets	(49)	0	(49)	0
Purchases, assets	43	42	276	108
Issuance, assets	0	0	0	0
Sales, assets	0	0	0	0
Settlements, assets	(43)	(50)	(325)	(99)
Balance at end of period, asset	211	326	211	326
Unrealized gains (losses) still held, assets	1	36	1	39
Trading non-derivative assets
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	2,698	3,319	3,647	2,455
Net realized/unrealized gains (losses) included in principal transactions	279	167	437	327
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	904	779	1,031	1,181
Transfers out of Level 3, assets	(496)	(211)	(711)	(359)
Purchases, assets	1,184	1,060	2,207	2,333
Issuance, assets	0	6	4	14
Sales, assets	(1,583)	(1,147)	(3,625)	(1,968)
Settlements, assets	0	(11)	(4)	(21)
Balance at end of period, asset	2,986	3,962	2,986	3,962
Unrealized gains (losses) still held, assets	(1)	49	59	(303)
Trading non-derivative assets | Mortgage securitizations - U.S. agency-sponsored
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	38	85	27	10
Net realized/unrealized gains (losses) included in principal transactions	2	1	1	(74)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	238	4	252	16
Transfers out of Level 3, assets	(7)	(6)	(8)	(9)
Purchases, assets	113	67	114	208
Issuance, assets	0	0	0	0
Sales, assets	(8)	(55)	(10)	(55)
Settlements, assets	0	0	0	0
Balance at end of period, asset	376	96	376	96
Unrealized gains (losses) still held, assets	(12)	4	16	5
Trading non-derivative assets | Residential
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	268	304	340	123
Net realized/unrealized gains (losses) included in principal transactions	(1)	14	22	6
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	41	144	69	204
Transfers out of Level 3, assets	(65)	(39)	(68)	(43)
Purchases, assets	57	96	201	274
Issuance, assets	0	0	0	0
Sales, assets	(205)	(86)	(469)	(131)
Settlements, assets	0	0	0	0
Balance at end of period, asset	95	433	95	433
Unrealized gains (losses) still held, assets	2	7	18	0
Trading non-derivative assets | Commercial
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	59	44	136	61
Net realized/unrealized gains (losses) included in principal transactions	16	4	21	4
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	60	140	76	143
Transfers out of Level 3, assets	(8)	(14)	(41)	(17)
Purchases, assets	11	62	24	89
Issuance, assets	0	0	0	0
Sales, assets	(51)	(19)	(129)	(63)
Settlements, assets	0	0	0	0
Balance at end of period, asset	87	217	87	217
Unrealized gains (losses) still held, assets	3	11	2	(10)
Trading non-derivative assets | Mortgage-backed securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	365	433	503	194
Net realized/unrealized gains (losses) included in principal transactions	17	19	44	(64)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	339	288	397	363
Transfers out of Level 3, assets	(80)	(59)	(117)	(69)
Purchases, assets	181	225	339	571
Issuance, assets	0	0	0	0
Sales, assets	(264)	(160)	(608)	(249)
Settlements, assets	0	0	0	0
Balance at end of period, asset	558	746	558	746
Unrealized gains (losses) still held, assets	(7)	22	36	(5)
Trading non-derivative assets | U.S. Treasury and federal agency securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	0	0	0	0
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3, assets	0	0	0	0
Purchases, assets	0	0	0	0
Issuance, assets	0	0	0	0
Sales, assets	0	0	0	0
Settlements, assets	0	0	0	0
Balance at end of period, asset	0	0	0	0
Unrealized gains (losses) still held, assets	0	0	0	0
Trading non-derivative assets | State and municipal
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	94	92	94	64
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	2
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	0	5	0	15
Transfers out of Level 3, assets	(29)	(1)	(29)	(3)
Purchases, assets	5	41	5	62
Issuance, assets	0	0	0	0
Sales, assets	0	(20)	0	(23)
Settlements, assets	0	0	0	0
Balance at end of period, asset	70	117	70	117
Unrealized gains (losses) still held, assets	0	0	1	1
Trading non-derivative assets | Foreign government
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	81	39	51	52
Net realized/unrealized gains (losses) included in principal transactions	4	57	5	(28)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	125	2	136	2
Transfers out of Level 3, assets	(28)	(2)	(28)	(2)
Purchases, assets	14	18	71	104
Issuance, assets	0	0	0	0
Sales, assets	(55)	(88)	(94)	(102)
Settlements, assets	0	0	0	0
Balance at end of period, asset	141	26	141	26
Unrealized gains (losses) still held, assets	1	54	(6)	52
Trading non-derivative assets | Corporate
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	290	412	375	313
Net realized/unrealized gains (losses) included in principal transactions	(15)	(12)	75	290
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	312	64	318	86
Transfers out of Level 3, assets	(50)	(78)	(168)	(70)
Purchases, assets	408	204	475	419
Issuance, assets	0	0	0	0
Sales, assets	(122)	(185)	(252)	(633)
Settlements, assets	0	(6)	0	(6)
Balance at end of period, asset	823	399	823	399
Unrealized gains (losses) still held, assets	(36)	(71)	(7)	(87)
Trading non-derivative assets | Marketable equity securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	89	143	73	100
Net realized/unrealized gains (losses) included in principal transactions	2	9	47	9
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	80	10	84	38
Transfers out of Level 3, assets	(40)	0	(42)	(3)
Purchases, assets	23	174	35	206
Issuance, assets	0	0	0	0
Sales, assets	(7)	(244)	(50)	(258)
Settlements, assets	0	0	0	0
Balance at end of period, asset	147	92	147	92
Unrealized gains (losses) still held, assets	15	(3)	32	(19)
Trading non-derivative assets | Asset-backed securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	1,208	1,561	1,606	1,117
Net realized/unrealized gains (losses) included in principal transactions	209	67	248	(102)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	17	257	35	496
Transfers out of Level 3, assets	(148)	(56)	(198)	(60)
Purchases, assets	352	272	934	740
Issuance, assets	0	0	0	0
Sales, assets	(946)	(316)	(1,933)	(466)
Settlements, assets	0	0	0	0
Balance at end of period, asset	692	1,785	692	1,785
Unrealized gains (losses) still held, assets	22	46	8	(222)
Trading non-derivative assets | Other trading assets
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	571	639	945	555
Net realized/unrealized gains (losses) included in principal transactions	62	27	18	220
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	31	153	61	181
Transfers out of Level 3, assets	(121)	(15)	(129)	(152)
Purchases, assets	201	126	348	231
Issuance, assets	0	6	4	14
Sales, assets	(189)	(134)	(688)	(237)
Settlements, assets	0	(5)	(4)	(15)
Balance at end of period, asset	555	797	555	797
Unrealized gains (losses) still held, assets	4	1	(5)	(23)
Investments
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	1,759	1,567	1,542	1,259
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	15	41	1	(55)
Transfers into Level 3	581	174	589	388
Transfers out of Level 3, assets	(397)	(347)	(397)	(346)
Purchases, assets	350	169	681	468
Issuance, assets	0	0	0	0
Sales, assets	(62)	(63)	(170)	(163)
Settlements, assets	0	(45)	0	(55)
Balance at end of period, asset	2,246	1,496	2,246	1,496
Unrealized gains (losses) still held, assets	(10)	16	(83)	49
Investments | Mortgage securitizations - U.S. agency-sponsored
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	30	47	30	32
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	2	(19)	2	(5)
Transfers into Level 3	22	1	22	1
Transfers out of Level 3, assets	0	0	0	1
Purchases, assets	3	1	3	1
Issuance, assets	0	0	0	0
Sales, assets	(5)	0	(5)	0
Settlements, assets	0	0	0	0
Balance at end of period, asset	52	30	52	30
Unrealized gains (losses) still held, assets	(21)	(36)	(42)	(23)
Investments | Residential
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset		0		0
Net realized/unrealized gains (losses) included in principal transactions		0		0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets		0		0
Transfers into Level 3		0		0
Transfers out of Level 3, assets		0		0
Purchases, assets		0		0
Issuance, assets		0		0
Sales, assets		0		0
Settlements, assets		0		0
Balance at end of period, asset		0		0
Unrealized gains (losses) still held, assets		0		0
Investments | Commercial
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset		0		0
Net realized/unrealized gains (losses) included in principal transactions		0		0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets		0		0
Transfers into Level 3		0		0
Transfers out of Level 3, assets		0		0
Purchases, assets		0		0
Issuance, assets		0		0
Sales, assets		0		0
Settlements, assets		0		0
Balance at end of period, asset		0		0
Unrealized gains (losses) still held, assets		0		0
Investments | Mortgage-backed securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	30	47	30	32
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	2	(19)	2	(5)
Transfers into Level 3	22	1	22	1
Transfers out of Level 3, assets	0	0	0	1
Purchases, assets	3	1	3	1
Issuance, assets	0	0	0	0
Sales, assets	(5)	0	(5)	0
Settlements, assets	0	0	0	0
Balance at end of period, asset	52	30	52	30
Unrealized gains (losses) still held, assets	(21)	(36)	(42)	(23)
Investments | U.S. Treasury and federal agency securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	0	0	0	0
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3, assets	0	0	0	0
Purchases, assets	0	0	0	0
Issuance, assets	0	0	0	0
Sales, assets	0	0	0	0
Settlements, assets	0	0	0	0
Balance at end of period, asset	0	0	0	0
Unrealized gains (losses) still held, assets	0	0	0	0
Investments | State and municipal
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	794	687	834	623
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	8	24	(10)	(7)
Transfers into Level 3	54	172	58	310
Transfers out of Level 3, assets	(108)	(131)	(108)	(131)
Purchases, assets	2	95	3	95
Issuance, assets	0	0	0	0
Sales, assets	(2)	(22)	(29)	(65)
Settlements, assets	0	0	0	0
Balance at end of period, asset	748	825	748	825
Unrealized gains (losses) still held, assets	6	21	(8)	25
Investments | Foreign government
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	523	225	268	96
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	3	7	1	5
Transfers into Level 3	440	0	440	27
Transfers out of Level 3, assets	(289)	(64)	(289)	(64)
Purchases, assets	315	61	645	208
Issuance, assets	0	0	0	0
Sales, assets	(35)	(33)	(108)	(76)
Settlements, assets	0	0	0	0
Balance at end of period, asset	957	196	957	196
Unrealized gains (losses) still held, assets	3	6	3	(9)
Investments | Corporate
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	56	238	60	45
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	(7)	10	(11)	2
Transfers into Level 3	32	0	32	49
Transfers out of Level 3, assets	0	(152)	0	(152)
Purchases, assets	30	10	30	162
Issuance, assets	0	0	0	0
Sales, assets	(7)	0	(7)	0
Settlements, assets	0	0	0	0
Balance at end of period, asset	104	106	104	106
Unrealized gains (losses) still held, assets	(1)	0	(1)	0
Investments | Marketable equity securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset		0		0
Net realized/unrealized gains (losses) included in principal transactions		0		0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets		0		0
Transfers into Level 3		1		1
Transfers out of Level 3, assets		0		0
Purchases, assets		0		0
Issuance, assets		0		0
Sales, assets		0		0
Settlements, assets		0		0
Balance at end of period, asset		1		1
Unrealized gains (losses) still held, assets		0		0
Investments | Asset-backed securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	4	16	1	22
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	(21)	(2)	(21)	3
Transfers into Level 3	33	0	36	0
Transfers out of Level 3, assets	0	0	0	0
Purchases, assets	0	0	0	0
Issuance, assets	0	0	0	0
Sales, assets	(13)	(8)	(13)	(19)
Settlements, assets	0	0	0	0
Balance at end of period, asset	3	6	3	6
Unrealized gains (losses) still held, assets	1	0	(37)	34
Investments | Other trading assets
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset		0		0
Net realized/unrealized gains (losses) included in principal transactions		0		0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets		0		0
Transfers into Level 3		0		0
Transfers out of Level 3, assets		0		0
Purchases, assets		0		0
Issuance, assets		0		0
Sales, assets		0		0
Settlements, assets		0		0
Balance at end of period, asset		0		0
Unrealized gains (losses) still held, assets		0		0
Investments | Non-marketable equity securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	352	354	349	441
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	30	21	40	(53)
Transfers into Level 3	0	0	1	0
Transfers out of Level 3, assets	0	0	0	0
Purchases, assets	0	2	0	2
Issuance, assets	0	0	0	0
Sales, assets	0	0	(8)	(3)
Settlements, assets	0	(45)	0	(55)
Balance at end of period, asset	382	332	382	332
Unrealized gains (losses) still held, assets	2	25	2	22
Loans
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	1,944	537	1,985	402
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	476	447	348	368
Transfers into Level 3	60	0	271	217
Transfers out of Level 3, assets	(2,051)	(5)	(2,051)	(6)
Purchases, assets	0	0	0	0
Issuance, assets	0	0	1	0
Sales, assets	0	0	0	0
Settlements, assets	0	(1)	(125)	(3)
Balance at end of period, asset	429	978	429	978
Unrealized gains (losses) still held, assets	169	355	100	509
Fair value, Derivative assets (liabilities) measured on recurring basis, level 3 fair-value category reconciliation
Transfers out of Level 3	(2,100)		(2,100)
Mortgage servicing rights
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	433	367	336	495
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	(21)	(26)	52	(169)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3, assets	0	0	0	0
Purchases, assets	0	0	0	0
Issuance, assets	25	24	68	56
Sales, assets	0	0	0	0
Settlements, assets	(18)	(20)	(37)	(37)
Balance at end of period, asset	419	345	419	345
Unrealized gains (losses) still held, assets	(21)	(14)	59	(147)
Other financial assets measured on a recurring basis
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	0	0	0	1
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	14	0	14
Transfers into Level 3	55	0	55	0
Transfers out of Level 3, assets	0	0	0	0
Purchases, assets	0	0	0	0
Issuance, assets	0	(6)	0	(6)
Sales, assets	0	(4)	0	(5)
Settlements, assets	0	(4)	0	(4)
Balance at end of period, asset	55	0	55	0
Unrealized gains (losses) still held, assets	$ 0	$ 2	$ 0	$ 16

FAIR VALUE MEASUREMENT - Leve_2

FAIR VALUE MEASUREMENT - Level 3 Fair Value Rollforward Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Loans
Fair value, assets and liabilities measured on recurring basis, level 3 fair-value category disclosures
Assets (liabilities) transferred out of Level 3	$ 2,100		$ 2,100
Long-term debt
Fair value, assets and liabilities measured on recurring basis, level 3 fair-value category disclosures
Assets (liabilities) transferred out of Level 3	(6,000)	$ 1,500	(6,000)	$ 4,200
Transfers into Level 3, liabilities	3,937	1,875	4,869	5,063
Long-term debt | Option Volatility
Fair value, assets and liabilities measured on recurring basis, level 3 fair-value category disclosures
Transfers into Level 3, liabilities			4,000
Long-term debt | Equity Volatility
Fair value, assets and liabilities measured on recurring basis, level 3 fair-value category disclosures
Transfers into Level 3, liabilities			800
Trading account assets and liabilities
Fair value, assets and liabilities measured on recurring basis, level 3 fair-value category disclosures
Assets (liabilities) transferred out of Level 3	(531)	52	(535)	183
Transfers into Level 3, derivative asset	(616)	135	(392)	1,398
Trading account assets and liabilities | Interest rate contracts
Fair value, assets and liabilities measured on recurring basis, level 3 fair-value category disclosures
Assets (liabilities) transferred out of Level 3	(321)	(20)	(321)	2
Transfers into Level 3, derivative asset	$ 218	$ 231	$ 173	$ 1,614

FAIR VALUE MEASUREMENT - Valuat

FAIR VALUE MEASUREMENT - Valuation Techniques and Inputs for Level 3 Fair Value Measurements (Details)	Jun. 30, 2021USD ($)year	Dec. 31, 2020USD ($)year
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities	$ 793,000,000	$ 1,066,000,000
Model-based | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities borrowed and purchased under agreements to resell	211,000,000	320,000,000
State and municipal, foreign government, corporate and other debt securities	973,000,000	852,000,000
Marketable equity securities		36,000,000
Loans and leases	335,000,000	1,804,000,000
Mortgage servicing rights	80,000,000	78,000,000
Interest-bearing deposits	154,000,000	206,000,000
Securities loaned and sold under agreement to repurchase	488,000,000	631,000,000
Securities sold, not yet purchased	116,000,000	178,000,000
Short-term borrowings and long-term debt	24,881,000,000	24,827,000,000
Model-based | Level 3 | Interest rate contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	3,740,000,000	5,143,000,000
Model-based | Level 3 | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	1,240,000,000	1,296,000,000
Model-based | Level 3 | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	5,608,000,000	7,330,000,000
Model-based | Level 3 | Commodity and other contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	1,640,000,000	1,636,000,000
Model-based | Level 3 | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	1,283,000,000	1,854,000,000
Price-based | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage-backed securities	136,000,000	344,000,000
State and municipal, foreign government, corporate and other debt securities	2,069,000,000	1,566,000,000
Marketable equity securities		36,000,000
Asset-backed securities	418,000,000	863,000,000
Non-marketable equities	97,000,000	142,000,000
Nontrading derivatives and other financial assets and liabilities measured on a recurring basis (gross)	17,000,000
Loans and leases	87,000,000
Securities sold, not yet purchased	52,000,000	62,000,000
Price-based | Level 3 | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	466,000,000	408,000,000
Price-based | Level 3 | Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities	139,000,000
Price-based | Level 3 | Illiquidity Discount
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities
Yield analysis | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage-backed securities	452,000,000	168,000,000
Asset-backed securities	211,000,000	744,000,000
Comparable analysis | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	248,000,000	205,000,000
Cash flow | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights	$ 339,000,000	$ 258,000,000
Minimum | Model-based | Level 3 | Credit Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities borrowed and purchased under agreements to resell	0.15%	0.15%
State and municipal, foreign government, corporate and other debt securities	0.0035	0.0035
Minimum | Model-based | Level 3 | Credit Spread | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0004	0.000350
Minimum | Model-based | Level 3 | Interest Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities borrowed and purchased under agreements to resell	0.30%	0.30%
Securities loaned and sold under agreement to repurchase	0.0006	0.0008
Minimum | Model-based | Level 3 | Interest Rate | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		0.0084
Minimum | Model-based | Level 3 | Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities		$ 0
Minimum | Model-based | Level 3 | IR Normal Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Interest-bearing deposits	0.0013	0.0011
Short-term borrowings and long-term debt	0.0011	0.0011
Minimum | Model-based | Level 3 | IR Normal Volatility | Interest rate contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0010	0.0011
Minimum | Model-based | Level 3 | IR Normal Volatility | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0011	0.0011
Minimum | Model-based | Level 3 | Inflation Volatility | Interest rate contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0028	0.0027
Minimum | Model-based | Level 3 | IR Basis | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	(0.0070)
Minimum | Model-based | Level 3 | FX Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt	0
Minimum | Model-based | Level 3 | FX Volatility | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0500	0.0170
Minimum | Model-based | Level 3 | IR-FX Correlation | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		0.4000
Minimum | Model-based | Level 3 | IR-IR Correlation | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		(0.2171)
Minimum | Model-based | Level 3 | IR Lognormal Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities sold, not yet purchased	0.5587	0.5206
Minimum | Model-based | Level 3 | Equity Forward
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt	0.5700
Minimum | Model-based | Level 3 | Equity Forward | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.5700
Minimum | Model-based | Level 3 | Equity - FX Correlation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt	(0.8100)
Minimum | Model-based | Level 3 | Forward Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt		0.1540
Minimum | Model-based | Level 3 | Forward Price | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		0.6588
Minimum | Model-based | Level 3 | Forward Price | Commodity and other contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0999	0.1540
Minimum | Model-based | Level 3 | Commodity Correlation | Commodity and other contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	(0.4900)	(0.4492)
Minimum | Model-based | Level 3 | Equity Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans and leases	0.2206	0.2465
Short-term borrowings and long-term debt	0.0007
Minimum | Model-based | Level 3 | Equity Volatility | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0	0.0500
Minimum | Model-based | Level 3 | WAL
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights | year	3.15	2.66
Minimum | Model-based | Level 3 | Commodity Volatility | Commodity and other contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.1000	0.0016
Minimum | Model-based | Level 3 | Contingent Event | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		1
Minimum | Price-based | Level 3 | Interest Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities sold, not yet purchased	0.0017	0.1003
Minimum | Price-based | Level 3 | Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage-backed securities	$ 4	$ 30
State and municipal, foreign government, corporate and other debt securities	5.24	0
Marketable equity securities	0
Asset-backed securities	2.08	2
Non-marketable equities	11.03	136
Nontrading derivatives and other financial assets and liabilities measured on a recurring basis (gross)	4.96
Loans and leases	35.23
Securities sold, not yet purchased	0	$ 0
Minimum | Price-based | Level 3 | Price | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	$ 15.06
Minimum | Price-based | Level 3 | Illiquidity Discount
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities	0.2470
Minimum | Price-based | Level 3 | PE Ratio
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	12
Minimum | Price-based | Level 3 | Adjustment Factor
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	0.18	0.20
Minimum | Price-based | Level 3 | EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	5.70	3.30
Minimum | Price-based | Level 3 | Revenue Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	10.20	2.70
Minimum | Price-based | Level 3 | WAL
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities | year		1.48
Minimum | Price-based | Level 3 | Recovery
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities		$ 5,733,000,000
Minimum | Price-based | Level 3 | Credit Correlation | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		0.2500
Minimum | Price-based | Level 3 | Upfront Points | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0505	0
Minimum | Price-based | Level 3 | Recovery Rate | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.2500	0.2000
Minimum | Price-based | Level 3 | Appraised Value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities		$ 287,000
Minimum | Yield analysis | Level 3 | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage-backed securities	1.64%	2.63%
Asset-backed securities	2.29%	3.77%
Minimum | Comparable analysis | Level 3 | Illiquidity Discount
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	100,000	0.1000
Minimum | Comparable analysis | Level 3 | PE Ratio
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities		13.60
Minimum | Cash flow | Level 3 | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights	0.0200	0.0286
Maximum | Model-based | Level 3 | Credit Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities borrowed and purchased under agreements to resell	0.15%	0.15%
State and municipal, foreign government, corporate and other debt securities	0.0583	0.0375
Maximum | Model-based | Level 3 | Credit Spread | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0600	0.035235
Maximum | Model-based | Level 3 | Interest Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities borrowed and purchased under agreements to resell	0.30%	0.35%
Securities loaned and sold under agreement to repurchase	0.0204	0.0186
Maximum | Model-based | Level 3 | Interest Rate | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		0.8409
Maximum | Model-based | Level 3 | Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities		$ 31,000
Maximum | Model-based | Level 3 | IR Normal Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Interest-bearing deposits	0.0075	0.0073
Short-term borrowings and long-term debt	0.0075	0.0073
Maximum | Model-based | Level 3 | IR Normal Volatility | Interest rate contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0075	0.0073
Maximum | Model-based | Level 3 | IR Normal Volatility | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0058	0.0052
Maximum | Model-based | Level 3 | Inflation Volatility | Interest rate contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0258	0.0236
Maximum | Model-based | Level 3 | IR Basis | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0107
Maximum | Model-based | Level 3 | FX Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt	0.3700
Maximum | Model-based | Level 3 | FX Volatility | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.2855	0.1263
Maximum | Model-based | Level 3 | IR-FX Correlation | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		0.6000
Maximum | Model-based | Level 3 | IR-IR Correlation | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		0.4000
Maximum | Model-based | Level 3 | IR Lognormal Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities sold, not yet purchased	1.3901	1.2887
Maximum | Model-based | Level 3 | Equity Forward
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt	1.2500
Maximum | Model-based | Level 3 | Equity Forward | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	1.2500
Maximum | Model-based | Level 3 | Equity - FX Correlation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt	0.8000
Maximum | Model-based | Level 3 | Forward Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt		2.6200
Maximum | Model-based | Level 3 | Forward Price | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		1.0520
Maximum | Model-based | Level 3 | Forward Price | Commodity and other contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	4.2106	2.6200
Maximum | Model-based | Level 3 | Commodity Correlation | Commodity and other contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.9200	0.9591
Maximum | Model-based | Level 3 | Equity Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans and leases	0.6396	0.8309
Short-term borrowings and long-term debt	2.9900
Maximum | Model-based | Level 3 | Equity Volatility | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	2.9900	0.9143
Maximum | Model-based | Level 3 | WAL
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights | year	6.32	5.40
Maximum | Model-based | Level 3 | Commodity Volatility | Commodity and other contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.6900	0.8017
Maximum | Model-based | Level 3 | Contingent Event | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		1
Maximum | Price-based | Level 3 | Interest Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities sold, not yet purchased	0.0023	0.2007
Maximum | Price-based | Level 3 | Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage-backed securities	$ 120.68	$ 111
State and municipal, foreign government, corporate and other debt securities	1,027.67	2,265
Marketable equity securities	97,500
Asset-backed securities	166.03	157
Non-marketable equities	1,610	2,041
Nontrading derivatives and other financial assets and liabilities measured on a recurring basis (gross)	44.50
Loans and leases	409.11
Securities sold, not yet purchased	12,351.44	$ 866
Maximum | Price-based | Level 3 | Price | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	$ 103.63
Maximum | Price-based | Level 3 | Illiquidity Discount
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities	0.2500
Maximum | Price-based | Level 3 | PE Ratio
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	31
Maximum | Price-based | Level 3 | Adjustment Factor
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	0.80	0.61
Maximum | Price-based | Level 3 | EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	19.40	36.70
Maximum | Price-based | Level 3 | Revenue Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	15.30	28
Maximum | Price-based | Level 3 | WAL
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities | year		1.48
Maximum | Price-based | Level 3 | Recovery
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities		$ 5,733,000,000
Maximum | Price-based | Level 3 | Credit Correlation | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		0.8000
Maximum | Price-based | Level 3 | Upfront Points | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	1	1.0720
Maximum | Price-based | Level 3 | Recovery Rate | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.7500	0.6000
Maximum | Price-based | Level 3 | Appraised Value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities		$ 39,745,000
Maximum | Yield analysis | Level 3 | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage-backed securities	17.78%	21.80%
Asset-backed securities	15.40%	21.77%
Maximum | Comparable analysis | Level 3 | Illiquidity Discount
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	350,000	0.4500
Maximum | Comparable analysis | Level 3 | PE Ratio
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities		28
Maximum | Cash flow | Level 3 | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights	0.1500	0.1600
Weighted Average | Model-based | Level 3 | Credit Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities borrowed and purchased under agreements to resell	0.15%	0.15%
State and municipal, foreign government, corporate and other debt securities	0.0246	0.0226
Weighted Average | Model-based | Level 3 | Credit Spread | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0052	0.009989
Weighted Average | Model-based | Level 3 | Interest Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities borrowed and purchased under agreements to resell	0.30%	0.32%
Securities loaned and sold under agreement to repurchase	0.0125	0.0071
Weighted Average | Model-based | Level 3 | Interest Rate | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		0.1755
Weighted Average | Model-based | Level 3 | Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities		$ 5,132
Weighted Average | Model-based | Level 3 | IR Normal Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Interest-bearing deposits	0.0061	0.0054
Short-term borrowings and long-term debt	0.0055	0.0051
Weighted Average | Model-based | Level 3 | IR Normal Volatility | Interest rate contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0055	0.0052
Weighted Average | Model-based | Level 3 | IR Normal Volatility | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0051	0.0046
Weighted Average | Model-based | Level 3 | Inflation Volatility | Interest rate contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0147	0.0078
Weighted Average | Model-based | Level 3 | IR Basis | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0010
Weighted Average | Model-based | Level 3 | FX Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt	0.1012
Weighted Average | Model-based | Level 3 | FX Volatility | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.0994	0.0541
Weighted Average | Model-based | Level 3 | IR-FX Correlation | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		0.5000
Weighted Average | Model-based | Level 3 | IR-IR Correlation | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		0.3809
Weighted Average | Model-based | Level 3 | IR Lognormal Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities sold, not yet purchased	1.0626	0.8982
Weighted Average | Model-based | Level 3 | Equity Forward
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt	0.8978
Weighted Average | Model-based | Level 3 | Equity Forward | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.8982
Weighted Average | Model-based | Level 3 | Equity - FX Correlation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt	(0.1254)
Weighted Average | Model-based | Level 3 | Forward Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short-term borrowings and long-term debt		0.9248
Weighted Average | Model-based | Level 3 | Forward Price | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		0.9182
Weighted Average | Model-based | Level 3 | Forward Price | Commodity and other contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	1.1004	0.9853
Weighted Average | Model-based | Level 3 | Commodity Correlation | Commodity and other contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.1834	0.7060
Weighted Average | Model-based | Level 3 | Equity Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans and leases	0.3076	0.5823
Short-term borrowings and long-term debt	0.6451
Weighted Average | Model-based | Level 3 | Equity Volatility | Equity contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.5026	0.4274
Weighted Average | Model-based | Level 3 | WAL
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights | year	5.49	4.46
Weighted Average | Model-based | Level 3 | Commodity Volatility | Commodity and other contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.2491	0.2372
Weighted Average | Model-based | Level 3 | Contingent Event | Foreign exchange contracts (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		1
Weighted Average | Price-based | Level 3 | Interest Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities sold, not yet purchased	0.0020	0.1370
Weighted Average | Price-based | Level 3 | Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage-backed securities	$ 91.67	$ 80
State and municipal, foreign government, corporate and other debt securities	213.01	90
Marketable equity securities	25,976.84
Asset-backed securities	68.96	59
Non-marketable equities	1,269.53	1,647
Nontrading derivatives and other financial assets and liabilities measured on a recurring basis (gross)	39.76
Loans and leases	111.37
Securities sold, not yet purchased	2,184.24	$ 80
Weighted Average | Price-based | Level 3 | Price | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	$ 72.48
Weighted Average | Price-based | Level 3 | Illiquidity Discount
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities	0.2487
Weighted Average | Price-based | Level 3 | PE Ratio
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	18.52
Weighted Average | Price-based | Level 3 | Adjustment Factor
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	0.47	0.25
Weighted Average | Price-based | Level 3 | EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	13.18	15.10
Weighted Average | Price-based | Level 3 | Revenue Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	13.58	8.92
Weighted Average | Price-based | Level 3 | WAL
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities | year		1.48
Weighted Average | Price-based | Level 3 | Recovery
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Marketable equity securities		$ 5,733,000,000
Weighted Average | Price-based | Level 3 | Credit Correlation | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets		0.4336
Weighted Average | Price-based | Level 3 | Upfront Points | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.5873	0.4810
Weighted Average | Price-based | Level 3 | Recovery Rate | Credit derivatives (gross)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative assets	0.4624	0.4160
Weighted Average | Price-based | Level 3 | Appraised Value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities		$ 21,754,000
Weighted Average | Yield analysis | Level 3 | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage-backed securities	7.31%	10.13%
Asset-backed securities	6.35%	9.01%
Weighted Average | Comparable analysis | Level 3 | Illiquidity Discount
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities	215,300	0.2529
Weighted Average | Comparable analysis | Level 3 | PE Ratio
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Non-marketable equities		22.83
Weighted Average | Cash flow | Level 3 | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights	0.0674	0.0632

FAIR VALUE MEASUREMENT - Item_2

FAIR VALUE MEASUREMENT - Items Measured at Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Items Measured at Fair Value on a Nonrecurring Basis
Non-marketable equity securities measured using the measurement alternative	$ 7,344	$ 7,332
Nonrecurring | Level 2
Items Measured at Fair Value on a Nonrecurring Basis
Loans held-for-sale	212	478
Other real estate owned	0	4
Loans	0	679
Non-marketable equity securities measured using the measurement alternative	152	312
Total assets	364	1,473
Nonrecurring | Level 3
Items Measured at Fair Value on a Nonrecurring Basis
Loans held-for-sale	375	2,897
Other real estate owned	22	13
Loans	354	336
Non-marketable equity securities measured using the measurement alternative	335	3
Total assets	1,086	3,249
Fair value | Nonrecurring
Items Measured at Fair Value on a Nonrecurring Basis
Loans held-for-sale	587	3,375
Other real estate owned	22	17
Loans	354	1,015
Non-marketable equity securities measured using the measurement alternative	487	315
Total assets	$ 1,450	$ 4,722

FAIR VALUE MEASUREMENT - Valu_2

FAIR VALUE MEASUREMENT - Valuation Techniques and Inputs for Level 3 Nonrecurring Fair Value Measurements (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Level 3 | Price-based
Valuation techniques and inputs
Non-marketable equities	$ 97,000,000		$ 97,000,000		$ 142,000,000
Nonrecurring
Nonrecurring fair value changes included in earnings
Nonrecurring fair value measurements included in earnings	245,000,000	$ (287,000,000)	334,000,000	$ (417,000,000)
Nonrecurring | Level 3
Valuation techniques and inputs
Loans held-for-sale	375,000,000		375,000,000		2,897,000,000
Nonrecurring | Level 3 | Price-based
Valuation techniques and inputs
Loans held-for-sale	375,000,000		375,000,000		2,683,000,000
Other real estate owned					7,000,000
Loans	128,000,000		128,000,000		147,000,000
Non-marketable equities	331,000,000		331,000,000
Nonrecurring | Level 3 | Recovery analysis
Valuation techniques and inputs
Other real estate owned	13,000,000		13,000,000		4,000,000
Loans	224,000,000		224,000,000		73,000,000
Price | Level 3 | Price-based | Minimum
Valuation techniques and inputs
Non-marketable equities	11.03		11.03		136
Price | Level 3 | Price-based | Maximum
Valuation techniques and inputs
Non-marketable equities	1,610		1,610		2,041
Price | Level 3 | Price-based | Weighted Average
Valuation techniques and inputs
Non-marketable equities	1,269.53		1,269.53		1,647
Price | Nonrecurring | Level 3 | Price-based | Minimum
Valuation techniques and inputs
Loans held-for-sale	90.32		90.32		79
Loans	2.55		2.55		2
Non-marketable equities	5.41		5.41
Price | Nonrecurring | Level 3 | Price-based | Maximum
Valuation techniques and inputs
Loans held-for-sale	100		100		100
Loans	60		60		49
Non-marketable equities	1,592.82		1,592.82
Price | Nonrecurring | Level 3 | Price-based | Weighted Average
Valuation techniques and inputs
Loans held-for-sale	96.68		96.68		98
Loans	29.10		29.10		23
Non-marketable equities	468.68		468.68
Price | Nonrecurring | Level 3 | Recovery analysis | Minimum
Valuation techniques and inputs
Other real estate owned					51
Price | Nonrecurring | Level 3 | Recovery analysis | Maximum
Valuation techniques and inputs
Other real estate owned					51
Price | Nonrecurring | Level 3 | Recovery analysis | Weighted Average
Valuation techniques and inputs
Other real estate owned					51
Appraised Value | Level 3 | Price-based | Minimum
Valuation techniques and inputs
Non-marketable equities					287,000
Appraised Value | Level 3 | Price-based | Maximum
Valuation techniques and inputs
Non-marketable equities					39,745,000
Appraised Value | Level 3 | Price-based | Weighted Average
Valuation techniques and inputs
Non-marketable equities					21,754,000
Appraised Value | Nonrecurring | Level 3 | Price-based | Minimum
Valuation techniques and inputs
Other real estate owned					3,110,711
Appraised Value | Nonrecurring | Level 3 | Price-based | Maximum
Valuation techniques and inputs
Other real estate owned					4,241,357
Appraised Value | Nonrecurring | Level 3 | Price-based | Weighted Average
Valuation techniques and inputs
Other real estate owned					3,586,975
Appraised Value | Nonrecurring | Level 3 | Recovery analysis | Minimum
Valuation techniques and inputs
Other real estate owned	20,000		20,000
Loans	4,000		4,000		34
Appraised Value | Nonrecurring | Level 3 | Recovery analysis | Maximum
Valuation techniques and inputs
Other real estate owned	1,800,000		1,800,000
Loans	21,240,661		21,240,661		43,646,426
Appraised Value | Nonrecurring | Level 3 | Recovery analysis | Weighted Average
Valuation techniques and inputs
Other real estate owned	599,971		599,971
Loans	4,002,656		4,002,656		$ 17,762,950
Recovery Rate | Nonrecurring | Level 3 | Recovery analysis | Minimum
Valuation techniques and inputs
Loans					0.99%
Recovery Rate | Nonrecurring | Level 3 | Recovery analysis | Maximum
Valuation techniques and inputs
Loans					78.00%
Recovery Rate | Nonrecurring | Level 3 | Recovery analysis | Weighted Average
Valuation techniques and inputs
Loans					13.37%
Loans held-for-sale | Nonrecurring
Nonrecurring fair value changes included in earnings
Nonrecurring fair value measurements included in earnings	(15,000,000)	32,000,000	(17,000,000)	(198,000,000)
Other real estate owned | Nonrecurring
Nonrecurring fair value changes included in earnings
Nonrecurring fair value measurements included in earnings	0	(1,000,000)	0	(1,000,000)
Loans | Nonrecurring
Nonrecurring fair value changes included in earnings
Nonrecurring fair value measurements included in earnings	49,000,000	(266,000,000)	60,000,000	(189,000,000)
Non-marketable equity securities measured using the measurement alternative | Nonrecurring
Nonrecurring fair value changes included in earnings
Nonrecurring fair value measurements included in earnings	$ 211,000,000	$ (52,000,000)	$ 291,000,000	$ (29,000,000)

FAIR VALUE MEASUREMENT - Estima

FAIR VALUE MEASUREMENT - Estimate Fair Value of Financial Instruments Not Carried at Fair Value (Details) - USD ($) $ in Millions	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Assets
Loans	$ 7,707		$ 6,854
Liabilities
Deposits	1,310,281		1,280,671
Purchased credit-deteriorated	19,238	$ 21,638	24,956	$ 26,298	$ 20,380	$ 12,783
Loans, net of unearned income	676,834		675,883
Corporate
Assets
Loans	7,693		6,840
Liabilities
Purchased credit-deteriorated	3,127	$ 4,084	5,402	$ 6,824	$ 3,451	$ 2,886
Loans, net of unearned income	400,939		387,044
Carrying value
Assets
Investments, net of allowance	181,900		110,300
Securities borrowed and purchased under agreements to resell	121,200		109,500
Loans	649,300		643,300
Other financial assets	397,900		383,200
Liabilities
Deposits	1,307,500		1,278,700
Securities loaned and sold under agreements to repurchase	145,100		139,300
Long-term debt	188,200		204,600
Other financial liabilities	114,800		102,400
Purchased credit-deteriorated	19,200		25,000
Fair value
Assets
Investments, net of allowance	183,400		113,200
Securities borrowed and purchased under agreements to resell	121,200		109,500
Loans	665,200		663,900
Other financial assets	397,900		383,200
Liabilities
Deposits	1,308,300		1,278,800
Securities loaned and sold under agreements to repurchase	145,100		139,300
Long-term debt	203,100		221,200
Other financial liabilities	114,800		102,400
Fair value | Corporate
Liabilities
Loans, net of unearned income	7,693		6,840
Fair value | Level 1
Assets
Investments, net of allowance	73,800		23,300
Securities borrowed and purchased under agreements to resell	0		0
Loans	0		0
Other financial assets	279,300		291,500
Liabilities
Deposits	0		0
Securities loaned and sold under agreements to repurchase	0		0
Long-term debt	0		0
Other financial liabilities	0		0
Fair value | Level 2
Assets
Investments, net of allowance	106,900		87,000
Securities borrowed and purchased under agreements to resell	120,900		109,500
Loans	0		600
Other financial assets	19,900		18,100
Liabilities
Deposits	1,138,600		1,093,300
Securities loaned and sold under agreements to repurchase	145,000		139,300
Long-term debt	184,000		197,800
Other financial liabilities	19,600		19,200
Fair value | Level 3
Assets
Investments, net of allowance	2,700		2,900
Securities borrowed and purchased under agreements to resell	300		0
Loans	665,200		663,300
Other financial assets	98,700		73,600
Liabilities
Deposits	169,700		185,500
Securities loaned and sold under agreements to repurchase	100		0
Long-term debt	19,100		23,400
Other financial liabilities	95,200		83,200
Fair value | Level 3 | Corporate
Fair value measurements additional disclosures
Unfunded lending commitments	6,700		7,300
Lease financing
Liabilities
Loans, net of unearned income	600		700
Lease financing | Corporate
Liabilities
Loans, net of unearned income	$ 602		$ 738

FAIR VALUE ELECTIONS - Changes

FAIR VALUE ELECTIONS - Changes in Fair Value Gains (Losses) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Securities borrowed and purchased under agreements to resell
Fair Value, Balance Sheet Grouping, Financial Statement Captions.
Gain (loss) from changes in fair value	$ (8)	$ (48)	$ (36)	$ 44
Trading account assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions.
Gain (loss) from changes in fair value	52	373	153	(461)
Certain corporate loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions.
Gain (loss) from changes in fair value	539	(154)	668	(1,017)
Certain consumer loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions.
Gain (loss) from changes in fair value	0	(1)	0	0
Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions.
Gain (loss) from changes in fair value	539	(155)	668	(1,017)
MSRs
Fair Value, Balance Sheet Grouping, Financial Statement Captions.
Gain (loss) from changes in fair value	(21)	(26)	52	(169)
Certain mortgage loans HFS
Fair Value, Balance Sheet Grouping, Financial Statement Captions.
Gain (loss) from changes in fair value	47	72	44	134
Total other assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions.
Gain (loss) from changes in fair value	26	46	96	(35)
Total assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions.
Gain (loss) from changes in fair value	609	216	881	(1,469)
Interest-bearing deposits
Fair Value, Balance Sheet Grouping, Financial Statement Captions.
Gain (loss) from changes in fair value	(130)	(164)	(93)	(52)
Securities loaned and sold under agreements to repurchase
Fair Value, Balance Sheet Grouping, Financial Statement Captions.
Gain (loss) from changes in fair value	5	196	18	(92)
Trading account liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions.
Gain (loss) from changes in fair value	8	44	10	(17)
Short-term borrowings
Fair Value, Balance Sheet Grouping, Financial Statement Captions.
Gain (loss) from changes in fair value	327	(259)	192	997
Long-term debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions.
Gain (loss) from changes in fair value	(2,441)	(5,402)	(433)	1,963
Total liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions.
Gain (loss) from changes in fair value	$ (2,231)	$ (5,585)	$ (306)	$ 2,799

FAIR VALUE ELECTIONS - Valuatio

FAIR VALUE ELECTIONS - Valuation Adjustments, Fair Value Option for Financial Assets and Financial Liabilities (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Fair Value Option Quantitative Disclosures
Gain (loss) on change in estimated fair value of debt liabilities due to change in company's own credit risk	$ (110)	$ (2,935)	$ (148)	$ 1,253
Balance of non-accrual loans or loans more than 90 days past due	0		0		$ 0
Aggregate unpaid principal balance in excess of fair value for non-accrual loans or loans more than 90 days past due	0		0		0
Certain loans and other credit product
Fair Value Option Quantitative Disclosures
Changes in fair value due to instrument-specific credit risk loss			2	$ 40
Certain loans and other credit product | Trading assets
Fair Value Option Quantitative Disclosures
Aggregate unpaid principal balance in excess of (less than) fair value	(203)		(203)		(915)
Balance of non-accrual loans or loans more than 90 days past due	0		0		0
Aggregate unpaid principal balance in excess of fair value for non-accrual loans or loans more than 90 days past due	0		0		0
Certain loans and other credit product | Loans
Fair Value Option Quantitative Disclosures
Aggregate unpaid principal balance in excess of (less than) fair value	(197)		(197)		(14)
Balance of non-accrual loans or loans more than 90 days past due	17		17		4
Aggregate unpaid principal balance in excess of fair value for non-accrual loans or loans more than 90 days past due	(15)		(15)		0
Certain debt host contracts across unallocated precious metals accounts
Fair Value Option Quantitative Disclosures
Carrying amount reported on the Consolidated Balance Sheet	400		400		500
Certain Investments in Unallocated Precious Metals | Forward derivative contract | Purchased
Fair Value Option Quantitative Disclosures
Derivative notionals	5,000		5,000
Certain Investments in Unallocated Precious Metals | Forward derivative contract | Sold
Fair Value Option Quantitative Disclosures
Derivative notionals	5,000		5,000
Mortgage receivable
Fair Value Option Quantitative Disclosures
Aggregate unpaid principal balance in excess of (less than) fair value	52		52		91
Carrying amount | Certain loans and other credit product | Trading assets
Fair Value Option Quantitative Disclosures
Carrying amount reported on the Consolidated Balance Sheet	8,594		8,594		8,063
Carrying amount | Certain loans and other credit product | Loans
Fair Value Option Quantitative Disclosures
Carrying amount reported on the Consolidated Balance Sheet	7,707		7,707		6,854
Carrying amount | Loans held-for-sale
Fair Value Option Quantitative Disclosures
Carrying amount reported on the Consolidated Balance Sheet	1,681		1,681		1,742
Fair value | Certain loans and other credit product
Fair Value Option Quantitative Disclosures
Unfunded lending commitments	$ 763		$ 763		$ 1,068

FAIR VALUE ELECTIONS - Certain

FAIR VALUE ELECTIONS - Certain Structured and Non-Structured Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Carrying value of structured notes, disaggregated by type of embedded derivative instrument
Carrying value of structured notes	$ 76,400	$ 67,000
Long-term debt
Carrying value of structured notes, disaggregated by type of embedded derivative instrument
Aggregate unpaid principal balance in excess of (less than) fair value	(4,638)	(5,130)
Short-term borrowings
Carrying value of structured notes, disaggregated by type of embedded derivative instrument
Aggregate unpaid principal balance in excess of (less than) fair value	0	68
Carrying amount | Long-term debt
Carrying value of structured notes, disaggregated by type of embedded derivative instrument
Carrying amount reported on the consolidated balance sheet	76,375	67,063
Carrying amount | Short-term borrowings
Carrying value of structured notes, disaggregated by type of embedded derivative instrument
Carrying amount reported on the consolidated balance sheet	7,358	4,683
Interest rate linked
Carrying value of structured notes, disaggregated by type of embedded derivative instrument
Carrying value of structured notes	38,900	34,500
Foreign exchange linked
Carrying value of structured notes, disaggregated by type of embedded derivative instrument
Carrying value of structured notes	600	1,200
Equity linked
Carrying value of structured notes, disaggregated by type of embedded derivative instrument
Carrying value of structured notes	31,300	27,300
Commodity linked
Carrying value of structured notes, disaggregated by type of embedded derivative instrument
Carrying value of structured notes	2,900	1,400
Credit linked
Carrying value of structured notes, disaggregated by type of embedded derivative instrument
Carrying value of structured notes	$ 2,700	$ 2,600

GUARANTEES, LEASES AND COMMIT_3

GUARANTEES, LEASES AND COMMITMENTS - Guarantees (Details)	Jun. 30, 2021USD ($)trust	Dec. 31, 2020USD ($)
Maximum potential amount of future payments
Expire within 1 year	$ 292,500,000,000	$ 266,900,000,000
Expire after 1 year	159,300,000,000	174,600,000,000
Total amount outstanding	451,800,000,000	441,500,000,000
Carrying value	$ 1,298,000,000	2,204,000,000
Number of trusts funded by the reinsurer | trust	2
Liability related to long-term care insurance indemnification	$ 0	0
Amount of cash initial margin collected and remitted	16,800,000,000	16,600,000,000
Cash collateral available to reimburse losses realized under guarantees and indemnifications	64,600,000,000	51,600,000,000
Securities and other marketable assets held as collateral	94,100,000,000	80,100,000,000
Letters of credit in favor of the Company held as collateral	4,500,000,000	6,600,000,000
Financial standby letters of credit
Maximum potential amount of future payments
Expire within 1 year	24,300,000,000	25,300,000,000
Expire after 1 year	68,200,000,000	68,400,000,000
Total amount outstanding	92,500,000,000	93,700,000,000
Carrying value	882,000,000	1,407,000,000
Performance guarantees
Maximum potential amount of future payments
Expire within 1 year	6,800,000,000	7,300,000,000
Expire after 1 year	5,900,000,000	6,000,000,000
Total amount outstanding	12,700,000,000	13,300,000,000
Carrying value	48,000,000	72,000,000
Derivative instruments considered to be guarantees
Maximum potential amount of future payments
Expire within 1 year	16,100,000,000	20,000,000,000
Expire after 1 year	58,500,000,000	60,900,000,000
Total amount outstanding	74,600,000,000	80,900,000,000
Carrying value	304,000,000	671,000,000
Loans sold with recourse
Maximum potential amount of future payments
Expire within 1 year	0	0
Expire after 1 year	1,700,000,000	1,200,000,000
Total amount outstanding	1,700,000,000	1,200,000,000
Carrying value	16,000,000	9,000,000
Repurchase reserve for consumer mortgages representations and warranties	32,000,000	31,000,000
Securities lending indemnifications
Maximum potential amount of future payments
Expire within 1 year	134,400,000,000	112,200,000,000
Expire after 1 year	0	0
Total amount outstanding	134,400,000,000	112,200,000,000
Carrying value	0	0
Credit card merchant processing
Maximum potential amount of future payments
Expire within 1 year	110,900,000,000	101,900,000,000
Expire after 1 year	0	0
Total amount outstanding	110,900,000,000	101,900,000,000
Carrying value	4,000,000	3,000,000
Credit card arrangements with partners
Maximum potential amount of future payments
Expire within 1 year	0	200,000,000
Expire after 1 year	800,000,000	800,000,000
Total amount outstanding	800,000,000	1,000,000,000
Carrying value	7,000,000	7,000,000
Custody indemnifications and other
Maximum potential amount of future payments
Expire within 1 year	0	0
Expire after 1 year	24,200,000,000	37,300,000,000
Total amount outstanding	24,200,000,000	37,300,000,000
Carrying value	$ 37,000,000	$ 35,000,000

GUARANTEES, LEASES AND COMMIT_4

GUARANTEES, LEASES AND COMMITMENTS - Performance Risk (Details) - USD ($) $ in Billions	Jun. 30, 2021	Dec. 31, 2020
Guarantor Obligations
Maximum potential amount of future payments	$ 451.8	$ 441.5
Investment grade
Guarantor Obligations
Maximum potential amount of future payments	99.4	113.2
Non-investment grade
Guarantor Obligations
Maximum potential amount of future payments	29.9	30
Not rated
Guarantor Obligations
Maximum potential amount of future payments	322.5	298.3
Financial standby letters of credit
Guarantor Obligations
Maximum potential amount of future payments	92.5	93.7
Financial standby letters of credit | Investment grade
Guarantor Obligations
Maximum potential amount of future payments	77.7	78.5
Financial standby letters of credit | Non-investment grade
Guarantor Obligations
Maximum potential amount of future payments	14.7	14.6
Financial standby letters of credit | Not rated
Guarantor Obligations
Maximum potential amount of future payments	0.1	0.6
Performance guarantees
Guarantor Obligations
Maximum potential amount of future payments	12.7	13.3
Performance guarantees | Investment grade
Guarantor Obligations
Maximum potential amount of future payments	10.1	9.8
Performance guarantees | Non-investment grade
Guarantor Obligations
Maximum potential amount of future payments	2.6	3
Performance guarantees | Not rated
Guarantor Obligations
Maximum potential amount of future payments	0	0.5
Derivative instruments deemed to be guarantees
Guarantor Obligations
Maximum potential amount of future payments	74.6	80.9
Derivative instruments deemed to be guarantees | Investment grade
Guarantor Obligations
Maximum potential amount of future payments	0	0
Derivative instruments deemed to be guarantees | Non-investment grade
Guarantor Obligations
Maximum potential amount of future payments	0	0
Derivative instruments deemed to be guarantees | Not rated
Guarantor Obligations
Maximum potential amount of future payments	74.6	80.9
Loans sold with recourse
Guarantor Obligations
Maximum potential amount of future payments	1.7	1.2
Loans sold with recourse | Investment grade
Guarantor Obligations
Maximum potential amount of future payments	0	0
Loans sold with recourse | Non-investment grade
Guarantor Obligations
Maximum potential amount of future payments	0	0
Loans sold with recourse | Not rated
Guarantor Obligations
Maximum potential amount of future payments	1.7	1.2
Securities lending indemnifications
Guarantor Obligations
Maximum potential amount of future payments	134.4	112.2
Securities lending indemnifications | Investment grade
Guarantor Obligations
Maximum potential amount of future payments	0	0
Securities lending indemnifications | Non-investment grade
Guarantor Obligations
Maximum potential amount of future payments	0	0
Securities lending indemnifications | Not rated
Guarantor Obligations
Maximum potential amount of future payments	134.4	112.2
Credit card merchant processing
Guarantor Obligations
Maximum potential amount of future payments	110.9	101.9
Credit card merchant processing | Investment grade
Guarantor Obligations
Maximum potential amount of future payments	0	0
Credit card merchant processing | Non-investment grade
Guarantor Obligations
Maximum potential amount of future payments	0	0
Credit card merchant processing | Not rated
Guarantor Obligations
Maximum potential amount of future payments	110.9	101.9
Credit card arrangements with partners
Guarantor Obligations
Maximum potential amount of future payments	0.8	1
Credit card arrangements with partners | Investment grade
Guarantor Obligations
Maximum potential amount of future payments	0	0
Credit card arrangements with partners | Non-investment grade
Guarantor Obligations
Maximum potential amount of future payments	0	0
Credit card arrangements with partners | Not rated
Guarantor Obligations
Maximum potential amount of future payments	0.8	1
Custody indemnifications and other
Guarantor Obligations
Maximum potential amount of future payments	24.2	37.3
Custody indemnifications and other | Investment grade
Guarantor Obligations
Maximum potential amount of future payments	11.6	24.9
Custody indemnifications and other | Non-investment grade
Guarantor Obligations
Maximum potential amount of future payments	12.6	12.4
Custody indemnifications and other | Not rated
Guarantor Obligations
Maximum potential amount of future payments	$ 0	$ 0

GUARANTEES, LEASES AND COMMIT_5

GUARANTEES, LEASES AND COMMITMENTS - Leases (Details) - USD ($) $ in Billions	Jun. 30, 2021	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Operating lease ROU asset	$ 2.8	$ 2.8
Operating lease, liability	$ 3	$ 3.1
Weighted Average
Lessee, Lease, Description [Line Items]
Operating lease term	6 years

GUARANTEES, LEASES AND COMMIT_6

GUARANTEES, LEASES AND COMMITMENTS - Credit Commitments and Lines of Credit (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Guarantor Obligations
Credit commitments	$ 1,084,183	$ 1,071,288
Unsettled reverse repurchase and securities borrowing agreements	92,400	71,800
Unsettled repurchase and securities lending agreements	38,200	62,500
Commercial and similar letters of credit
Guarantor Obligations
Credit commitments	5,769	5,221
One- to four-family residential mortgages
Guarantor Obligations
Credit commitments	4,343	5,002
Revolving open-end loans secured by one- to four-family residential properties
Guarantor Obligations
Credit commitments	8,841	9,626
Commercial real estate, construction and land development
Guarantor Obligations
Credit commitments	16,466	12,867
Credit card lines
Guarantor Obligations
Credit commitments	707,951	710,399
Commercial and other consumer loan commitments
Guarantor Obligations
Credit commitments	335,011	322,458
Other commitments and contingencies
Guarantor Obligations
Credit commitments	5,802	$ 5,715
U.S.
Guarantor Obligations
Credit commitments	850,643
U.S. | Commercial and similar letters of credit
Guarantor Obligations
Credit commitments	929
U.S. | One- to four-family residential mortgages
Guarantor Obligations
Credit commitments	1,823
U.S. | Revolving open-end loans secured by one- to four-family residential properties
Guarantor Obligations
Credit commitments	7,687
U.S. | Commercial real estate, construction and land development
Guarantor Obligations
Credit commitments	14,959
U.S. | Credit card lines
Guarantor Obligations
Credit commitments	605,944
U.S. | Commercial and other consumer loan commitments
Guarantor Obligations
Credit commitments	214,023
U.S. | Other commitments and contingencies
Guarantor Obligations
Credit commitments	5,278
Outside of  U.S.
Guarantor Obligations
Credit commitments	233,540
Outside of  U.S. | Commercial and similar letters of credit
Guarantor Obligations
Credit commitments	4,840
Outside of  U.S. | One- to four-family residential mortgages
Guarantor Obligations
Credit commitments	2,520
Outside of  U.S. | Revolving open-end loans secured by one- to four-family residential properties
Guarantor Obligations
Credit commitments	1,154
Outside of  U.S. | Commercial real estate, construction and land development
Guarantor Obligations
Credit commitments	1,507
Outside of  U.S. | Credit card lines
Guarantor Obligations
Credit commitments	102,007
Outside of  U.S. | Commercial and other consumer loan commitments
Guarantor Obligations
Credit commitments	120,988
Outside of  U.S. | Other commitments and contingencies
Guarantor Obligations
Credit commitments	$ 524

GUARANTEES, LEASES AND COMMIT_7

GUARANTEES, LEASES AND COMMITMENTS - Restricted Cash (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 17,751	$ 17,977
Cash and due from banks
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	4,001	3,774
Deposits with banks
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 13,750	$ 14,203

CONTINGENCIES (Details)

CONTINGENCIES (Details) $ in Billions	Jun. 30, 2021USD ($)
Commitments and Contingencies Disclosure [Abstract]
Loss contingency, portion not accrued	$ 1.4

CONDENSED CONSOLIDATING FINAN_3

CONDENSED CONSOLIDATING FINANCIAL STATEMENTS - Condensed Consolidating Statements of Income and Comprehensive Income (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues
Dividends from subsidiaries		$ 0	$ 0	$ 0	$ 0
Interest revenue		12,463	14,589	24,997	31,728
Interest revenue—intercompany		0	0	0	0
Interest expense		2,264	3,509	4,632	9,156
Interest expense—intercompany		0	0	0	0
Net interest revenue		10,199	11,080	20,365	22,572
Commissions and fees		3,374	2,933	7,044	5,954
Commissions and fees—intercompany		0	0	0	0
Principal transactions		2,304	4,157	6,217	9,418
Principal transactions—intercompany		0	0	0	0
Other revenue		1,597	1,596	3,175	2,553
Other revenue—intercompany		0	0	0	0
Total non-interest revenues		7,275	8,686	16,436	17,925
Total revenues, net of interest expense		17,474	19,766	36,801	40,497
Total provisions for credit losses and for benefits and claims	[1]	(1,066)	8,197	(3,121)	15,157
Operating expenses
Compensation and benefits		5,982	5,624	11,983	11,278
Compensation and benefits—intercompany		0	0	0	0
Other operating		5,210	4,836	10,282	9,825
Other operating—intercompany		0	0	0	0
Total operating expenses		11,192	10,460	22,265	21,103
Equity in undistributed income of subsidiaries		0	0	0	0
Income (loss) from continuing operations before income taxes		7,348	1,109	17,657	4,237
Provision (benefits) for income taxes		1,155	52	3,487	632
Income (loss) from continuing operations		6,193	1,057	14,170	3,605
Income (loss) from discontinued operations, net of taxes		10	(1)	8	(19)
Net income (loss) before attribution of noncontrolling interests		6,203	1,056	14,178	3,586
Noncontrolling interests		10	0	43	(6)
Citigroup’s net income		6,193	1,056	14,135	3,592
Comprehensive income
Add: Other comprehensive income (loss)	[2]	(109)	(824)	(3,062)	2,973
Total Citigroup comprehensive income (loss)		6,084	232	11,073	6,565
Add: Other comprehensive income (loss) attributable to noncontrolling interests		18	39	(40)	(12)
Add: Net income (loss) attributable to noncontrolling interests		10	0	43	(6)
Total comprehensive income (loss)		6,112	271	11,076	6,547
Reportable legal entities | Citigroup parent company
Revenues
Dividends from subsidiaries		3,700	0	3,800	105
Interest revenue		0	0	0	0
Interest revenue—intercompany		954	1,067	1,912	2,211
Interest expense		1,209	1,265	2,421	2,408
Interest expense—intercompany		94	142	178	390
Net interest revenue		(349)	(340)	(687)	(587)
Commissions and fees		0	0	0	0
Commissions and fees—intercompany		(1)	0	(27)	(19)
Principal transactions		(892)	(258)	877	(930)
Principal transactions—intercompany		910	62	(968)	564
Other revenue		(4)	(14)	51	66
Other revenue—intercompany		3	8	(61)	(62)
Total non-interest revenues		16	(202)	(128)	(381)
Total revenues, net of interest expense		3,367	(542)	2,985	(863)
Total provisions for credit losses and for benefits and claims		2	0	2	0
Operating expenses
Compensation and benefits		0	105	28	133
Compensation and benefits—intercompany		24	1	48	75
Other operating		14	9	25	32
Other operating—intercompany		3	4	6	8
Total operating expenses		41	119	107	248
Equity in undistributed income of subsidiaries		2,567	1,847	10,740	4,229
Income (loss) from continuing operations before income taxes		5,891	1,186	13,616	3,118
Provision (benefits) for income taxes		(302)	130	(519)	(474)
Income (loss) from continuing operations		6,193	1,056	14,135	3,592
Income (loss) from discontinued operations, net of taxes		0	0	0	0
Net income (loss) before attribution of noncontrolling interests		6,193	1,056	14,135	3,592
Noncontrolling interests		0	0	0	0
Citigroup’s net income		6,193	1,056	14,135	3,592
Comprehensive income
Add: Other comprehensive income (loss)		(109)	(824)	(3,062)	2,973
Total Citigroup comprehensive income (loss)		6,084	232	11,073	6,565
Add: Other comprehensive income (loss) attributable to noncontrolling interests		0	0	0	0
Add: Net income (loss) attributable to noncontrolling interests		0	0	0	0
Total comprehensive income (loss)		6,084	232	11,073	6,565
Reportable legal entities | CGMHI
Revenues
Dividends from subsidiaries		0	0	0	0
Interest revenue		1,014	1,309	1,985	3,212
Interest revenue—intercompany		136	282	281	623
Interest expense		221	380	444	1,521
Interest expense—intercompany		330	621	659	1,403
Net interest revenue		599	590	1,163	911
Commissions and fees		1,836	1,771	3,997	3,321
Commissions and fees—intercompany		88	73	135	237
Principal transactions		919	(2,993)	6,577	3,261
Principal transactions—intercompany		(110)	4,890	(4,348)	499
Other revenue		139	211	242	260
Other revenue—intercompany		(8)	13	(28)	26
Total non-interest revenues		2,864	3,965	6,575	7,604
Total revenues, net of interest expense		3,463	4,555	7,738	8,515
Total provisions for credit losses and for benefits and claims		3	1	7	0
Operating expenses
Compensation and benefits		1,303	1,345	2,637	2,641
Compensation and benefits—intercompany		0	0	0	0
Other operating		680	594	1,322	1,192
Other operating—intercompany		808	375	1,488	857
Total operating expenses		2,791	2,314	5,447	4,690
Equity in undistributed income of subsidiaries		0	0	0	0
Income (loss) from continuing operations before income taxes		669	2,240	2,284	3,825
Provision (benefits) for income taxes		(119)	715	333	1,052
Income (loss) from continuing operations		788	1,525	1,951	2,773
Income (loss) from discontinued operations, net of taxes		0	0	0	0
Net income (loss) before attribution of noncontrolling interests		788	1,525	1,951	2,773
Noncontrolling interests		0	0	0	0
Citigroup’s net income		788	1,525	1,951	2,773
Comprehensive income
Add: Other comprehensive income (loss)		7	(1,429)	(43)	328
Total Citigroup comprehensive income (loss)		795	96	1,908	3,101
Add: Other comprehensive income (loss) attributable to noncontrolling interests		0	0	0	0
Add: Net income (loss) attributable to noncontrolling interests		0	0	0	0
Total comprehensive income (loss)		795	96	1,908	3,101
Reportable legal entities | Other Citigroup subsidiaries and eliminations
Revenues
Dividends from subsidiaries		0	0	0	0
Interest revenue		11,449	13,280	23,012	28,516
Interest revenue—intercompany		(1,090)	(1,349)	(2,193)	(2,834)
Interest expense		834	1,864	1,767	5,227
Interest expense—intercompany		(424)	(763)	(837)	(1,793)
Net interest revenue		9,949	10,830	19,889	22,248
Commissions and fees		1,538	1,162	3,047	2,633
Commissions and fees—intercompany		(87)	(73)	(108)	(218)
Principal transactions		2,277	7,408	(1,237)	7,087
Principal transactions—intercompany		(800)	(4,952)	5,316	(1,063)
Other revenue		1,462	1,399	2,882	2,227
Other revenue—intercompany		5	(21)	89	36
Total non-interest revenues		4,395	4,923	9,989	10,702
Total revenues, net of interest expense		14,344	15,753	29,878	32,950
Total provisions for credit losses and for benefits and claims		(1,071)	8,196	(3,130)	15,157
Operating expenses
Compensation and benefits		4,679	4,174	9,318	8,504
Compensation and benefits—intercompany		(24)	(1)	(48)	(75)
Other operating		4,516	4,233	8,935	8,601
Other operating—intercompany		(811)	(379)	(1,494)	(865)
Total operating expenses		8,360	8,027	16,711	16,165
Equity in undistributed income of subsidiaries		0	0	0	0
Income (loss) from continuing operations before income taxes		7,055	(470)	16,297	1,628
Provision (benefits) for income taxes		1,576	(793)	3,673	54
Income (loss) from continuing operations		5,479	323	12,624	1,574
Income (loss) from discontinued operations, net of taxes		10	(1)	8	(19)
Net income (loss) before attribution of noncontrolling interests		5,489	322	12,632	1,555
Noncontrolling interests		10	0	43	(6)
Citigroup’s net income		5,479	322	12,589	1,561
Comprehensive income
Add: Other comprehensive income (loss)		(1,966)	(1,223)	(1,429)	12,236
Total Citigroup comprehensive income (loss)		3,513	(901)	11,160	13,797
Add: Other comprehensive income (loss) attributable to noncontrolling interests		18	39	(40)	(12)
Add: Net income (loss) attributable to noncontrolling interests		10	0	43	(6)
Total comprehensive income (loss)		3,541	(862)	11,163	13,779
Consolidating adjustments
Revenues
Dividends from subsidiaries		(3,700)	0	(3,800)	(105)
Interest revenue		0	0	0	0
Interest revenue—intercompany		0	0	0	0
Interest expense		0	0	0	0
Interest expense—intercompany		0	0	0	0
Net interest revenue		0	0	0	0
Commissions and fees		0	0	0	0
Commissions and fees—intercompany		0	0	0	0
Principal transactions		0	0	0	0
Principal transactions—intercompany		0	0	0	0
Other revenue		0	0	0	0
Other revenue—intercompany		0	0	0	0
Total non-interest revenues		0	0	0	0
Total revenues, net of interest expense		(3,700)	0	(3,800)	(105)
Total provisions for credit losses and for benefits and claims		0	0	0	0
Operating expenses
Compensation and benefits		0	0	0	0
Compensation and benefits—intercompany		0	0	0	0
Other operating		0	0	0	0
Other operating—intercompany		0	0	0	0
Total operating expenses		0	0	0	0
Equity in undistributed income of subsidiaries		(2,567)	(1,847)	(10,740)	(4,229)
Income (loss) from continuing operations before income taxes		(6,267)	(1,847)	(14,540)	(4,334)
Provision (benefits) for income taxes		0	0	0	0
Income (loss) from continuing operations		(6,267)	(1,847)	(14,540)	(4,334)
Income (loss) from discontinued operations, net of taxes		0	0	0	0
Net income (loss) before attribution of noncontrolling interests		(6,267)	(1,847)	(14,540)	(4,334)
Noncontrolling interests		0	0	0	0
Citigroup’s net income		(6,267)	(1,847)	(14,540)	(4,334)
Comprehensive income
Add: Other comprehensive income (loss)		1,959	2,652	1,472	(12,564)
Total Citigroup comprehensive income (loss)		(4,308)	805	(13,068)	(16,898)
Add: Other comprehensive income (loss) attributable to noncontrolling interests		0	0	0	0
Add: Net income (loss) attributable to noncontrolling interests		0	0	0	0
Total comprehensive income (loss)		$ (4,308)	$ 805	$ (13,068)	$ (16,898)
[1]	This total excludes the provision for credit losses on AFS securities, which is disclosed separately above.
[2]	See Note 17 to the Consolidated Financial Statements.

CONDENSED CONSOLIDATING FINAN_4

CONDENSED CONSOLIDATING FINANCIAL STATEMENTS - Condensed Consolidating Balance Sheets (Details) - USD ($) $ in Millions	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Assets
Cash and due from banks	$ 27,117		$ 26,349
Cash and due from banks—intercompany	0		0
Deposits with banks	272,121		283,266
Deposits with banks—intercompany	0		0
Securities borrowed or purchased under agreements to resell	309,047		294,712
Securities borrowed and purchased under resale agreements—intercompany	0		0
Trading account assets	370,950		375,079
Trading account assets—intercompany	0		0
Investments	487,063		447,359
Loans, net of unearned income	676,834		675,883
Loans, net of unearned income—intercompany	0		0
Allowance for credit losses on loans (ACLL)	(19,238)	$ (21,638)	(24,956)	$ (26,298)	$ (20,380)	$ (12,783)
Total loans, net	657,596		650,927
Advances to subsidiaries	0		0
Investments in subsidiaries	0		0
Other assets	203,974		182,398
Other assets—intercompany	0		0
Total assets	2,327,868		2,260,090
Liabilities and equity
Deposits	1,310,281		1,280,671
Deposits—intercompany	0		0
Securities loaned and sold under agreements to repurchase (including $76,705 and $60,206 as of June 30, 2021 and December 31, 2020, respectively, at fair value)	221,817		199,525
Securities loaned and sold under repurchase agreements—intercompany	0		0
Trading account liabilities	174,706		168,027
Trading account liabilities—intercompany	0		0
Short-term borrowings	31,462		29,514
Short-term borrowings—intercompany	0		0
Long-term debt	264,575		271,686
Long-term debt—intercompany	0		0
Advances from subsidiaries	0		0
Other liabilities, including allowance	122,117		110,467
Other liabilities—intercompany	0		0
Stockholders’ equity	202,910		200,200	$ 192,386
Total liabilities and equity	2,327,868		2,260,090
Increase in other assets	116,089		110,683
Citigroup parent company
Liabilities and equity
Long-term debt	174,366		170,563
Citibank, N.A.
Liabilities and equity
Increase in other assets	42,000		29,500
Citibank, N.A. | Up to 30 days
Liabilities and equity
Placements with term of less than 30 days	31,800		24,300
Reportable legal entities | Citigroup parent company
Assets
Cash and due from banks	0		0
Cash and due from banks—intercompany	16		16
Deposits with banks	0		0
Deposits with banks—intercompany	3,000		4,500
Securities borrowed or purchased under agreements to resell	0		0
Securities borrowed and purchased under resale agreements—intercompany	0		0
Trading account assets	264		307
Trading account assets—intercompany	1,069		723
Investments	1		1
Loans, net of unearned income	0		0
Loans, net of unearned income—intercompany	0		0
Allowance for credit losses on loans (ACLL)	0		0
Total loans, net	0		0
Advances to subsidiaries	153,845		152,383
Investments in subsidiaries	220,810		213,267
Other assets	11,302		12,156
Other assets—intercompany	3,354		2,781
Total assets	393,661		386,134
Liabilities and equity
Deposits	0		0
Deposits—intercompany	0		0
Securities loaned and sold under agreements to repurchase (including $76,705 and $60,206 as of June 30, 2021 and December 31, 2020, respectively, at fair value)	0		0
Securities loaned and sold under repurchase agreements—intercompany	0		0
Trading account liabilities	19		0
Trading account liabilities—intercompany	564		397
Short-term borrowings	0		0
Short-term borrowings—intercompany	0		0
Long-term debt	174,366		170,563
Long-term debt—intercompany	0		0
Advances from subsidiaries	13,747		12,975
Other liabilities, including allowance	2,806		2,692
Other liabilities—intercompany	0		65
Stockholders’ equity	202,159		199,442
Total liabilities and equity	393,661		386,134
Reportable legal entities | CGMHI
Assets
Cash and due from banks	723		628
Cash and due from banks—intercompany	5,919		6,081
Deposits with banks	7,398		5,224
Deposits with banks—intercompany	8,915		8,179
Securities borrowed or purchased under agreements to resell	251,864		238,718
Securities borrowed and purchased under resale agreements—intercompany	25,247		24,309
Trading account assets	222,808		222,278
Trading account assets—intercompany	9,759		9,400
Investments	265		374
Loans, net of unearned income	3,135		2,524
Loans, net of unearned income—intercompany	0		0
Allowance for credit losses on loans (ACLL)	0		0
Total loans, net	3,135		2,524
Advances to subsidiaries	0		0
Investments in subsidiaries	0		0
Other assets	74,398		60,273
Other assets—intercompany	58,861		51,489
Total assets	669,292		629,477
Liabilities and equity
Deposits	0		0
Deposits—intercompany	0		0
Securities loaned and sold under agreements to repurchase (including $76,705 and $60,206 as of June 30, 2021 and December 31, 2020, respectively, at fair value)	203,715		184,786
Securities loaned and sold under repurchase agreements—intercompany	48,508		76,590
Trading account liabilities	125,785		113,100
Trading account liabilities—intercompany	8,578		8,591
Short-term borrowings	15,681		12,323
Short-term borrowings—intercompany	18,337		12,757
Long-term debt	56,087		47,732
Long-term debt—intercompany	77,668		67,322
Advances from subsidiaries	0		0
Other liabilities, including allowance	61,526		55,217
Other liabilities—intercompany	16,004		15,378
Stockholders’ equity	37,403		35,681
Total liabilities and equity	669,292		629,477
Reportable legal entities | Other Citigroup subsidiaries and eliminations
Assets
Cash and due from banks	26,394		25,721
Cash and due from banks—intercompany	(5,935)		(6,097)
Deposits with banks	264,723		278,042
Deposits with banks—intercompany	(11,915)		(12,679)
Securities borrowed or purchased under agreements to resell	57,183		55,994
Securities borrowed and purchased under resale agreements—intercompany	(25,247)		(24,309)
Trading account assets	147,878		152,494
Trading account assets—intercompany	(10,828)		(10,123)
Investments	486,797		446,984
Loans, net of unearned income	673,699		673,359
Loans, net of unearned income—intercompany	0		0
Allowance for credit losses on loans (ACLL)	(19,238)		(24,956)
Total loans, net	654,461		648,403
Advances to subsidiaries	(153,845)		(152,383)
Investments in subsidiaries	0		0
Other assets	118,274		109,969
Other assets—intercompany	(62,215)		(54,270)
Total assets	1,485,725		1,457,746
Liabilities and equity
Deposits	1,310,281		1,280,671
Deposits—intercompany	0		0
Securities loaned and sold under agreements to repurchase (including $76,705 and $60,206 as of June 30, 2021 and December 31, 2020, respectively, at fair value)	18,102		14,739
Securities loaned and sold under repurchase agreements—intercompany	(48,508)		(76,590)
Trading account liabilities	48,902		54,927
Trading account liabilities—intercompany	(9,142)		(8,988)
Short-term borrowings	15,781		17,191
Short-term borrowings—intercompany	(18,337)		(12,757)
Long-term debt	34,122		53,391
Long-term debt—intercompany	(77,668)		(67,322)
Advances from subsidiaries	(13,747)		(12,975)
Other liabilities, including allowance	57,785		52,558
Other liabilities—intercompany	(16,004)		(15,443)
Stockholders’ equity	184,158		178,344
Total liabilities and equity	1,485,725		1,457,746
Consolidating adjustments
Assets
Cash and due from banks	0		0
Cash and due from banks—intercompany	0		0
Deposits with banks	0		0
Deposits with banks—intercompany	0		0
Securities borrowed or purchased under agreements to resell	0		0
Securities borrowed and purchased under resale agreements—intercompany	0		0
Trading account assets	0		0
Trading account assets—intercompany	0		0
Investments	0		0
Loans, net of unearned income	0		0
Loans, net of unearned income—intercompany	0		0
Allowance for credit losses on loans (ACLL)	0		0
Total loans, net	0		0
Advances to subsidiaries	0		0
Investments in subsidiaries	(220,810)		(213,267)
Other assets	0		0
Other assets—intercompany	0		0
Total assets	(220,810)		(213,267)
Liabilities and equity
Deposits	0		0
Deposits—intercompany	0		0
Securities loaned and sold under agreements to repurchase (including $76,705 and $60,206 as of June 30, 2021 and December 31, 2020, respectively, at fair value)	0		0
Securities loaned and sold under repurchase agreements—intercompany	0		0
Trading account liabilities	0		0
Trading account liabilities—intercompany	0		0
Short-term borrowings	0		0
Short-term borrowings—intercompany	0		0
Long-term debt	0		0
Long-term debt—intercompany	0		0
Advances from subsidiaries	0		0
Other liabilities, including allowance	0		0
Other liabilities—intercompany	0		0
Stockholders’ equity	(220,810)		(213,267)
Total liabilities and equity	$ (220,810)		$ (213,267)

CONDENSED CONSOLIDATING FINAN_5

CONDENSED CONSOLIDATING FINANCIAL STATEMENTS - Condensed Consolidating Statement of Cash Flows (Details) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities of continuing operations		$ 23,563	$ (19,208)
Cash flows from investing activities of continuing operations
Purchases of investments		(201,567)	(207,701)
Proceeds from sales of investments		66,477	86,191
Proceeds from maturities of investments		75,195	53,909
Change in loans		(3,088)	7,943
Proceeds from sales and securitizations of loans		869	826
Change in securities borrowed and purchased under agreements to resell		(14,335)	(31,595)
Changes in investments and advances—intercompany		0	0
Other investing activities		(1,662)	(1,262)
Net cash used in investing activities of continuing operations		(78,111)	(91,689)
Cash flows from financing activities of continuing operations
Dividends paid		(2,663)	(2,679)
Issuance of preferred stock		2,300	1,500
Redemption of preferred stock		(3,785)	(1,500)
Treasury stock acquired		(4,381)	(2,925)
Proceeds (repayments) from issuance of long-term debt, net		(383)	26,174
Proceeds (repayments) from issuance of long-term debt—intercompany, net		0	0
Change in deposits		29,610	163,070
Change in securities loaned and sold under agreements to repurchase		22,292	49,383
Change in short-term borrowings		1,948	(4,893)
Net change in short-term borrowings and other advances—intercompany		0	0
Other financing activities		(324)	(407)
Net cash provided by financing activities of continuing operations		44,614	227,723
Effect of exchange rate changes on cash and due from banks		(443)	(972)
Change in cash, due from banks and deposits with banks		(10,377)	115,854
Cash, due from banks and deposits with banks at beginning of period		309,615	193,919
Cash, due from banks and deposits with banks at end of period		299,238	309,773
Cash and due from banks (including segregated cash and other deposits)		27,117	22,889	$ 26,349
Deposits with banks, net of allowance		272,121	286,884	283,266
Cash, due from banks and deposits with banks at end of period		299,238	309,773	309,615
Supplemental disclosure of cash flow information for continuing operations
Cash paid (received) during the period for income taxes		2,176	2,543
Cash paid during the period for interest		4,545	8,751
Non-cash investing activities
Transfers to loans HFS from loans	[1]	961	1,036
Reportable legal entities | Citigroup parent company
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities of continuing operations		1,429	2,857
Cash flows from investing activities of continuing operations
Purchases of investments		0	0
Proceeds from sales of investments		0	0
Proceeds from maturities of investments		0	0
Change in loans		0	0
Proceeds from sales and securitizations of loans		0	0
Change in securities borrowed and purchased under agreements to resell		0	0
Changes in investments and advances—intercompany		(2,424)	(7,371)
Other investing activities		0	0
Net cash used in investing activities of continuing operations		(2,424)	(7,371)
Cash flows from financing activities of continuing operations
Dividends paid		(2,663)	(2,679)
Issuance of preferred stock		2,300	1,500
Redemption of preferred stock		(3,785)	(1,500)
Treasury stock acquired		(4,381)	(2,925)
Proceeds (repayments) from issuance of long-term debt, net		7,576	17,353
Proceeds (repayments) from issuance of long-term debt—intercompany, net		0	0
Change in deposits		0	0
Change in securities loaned and sold under agreements to repurchase		0	0
Change in short-term borrowings		0	0
Net change in short-term borrowings and other advances—intercompany		772	(6,826)
Other financing activities		(324)	(407)
Net cash provided by financing activities of continuing operations		(505)	4,516
Effect of exchange rate changes on cash and due from banks		0	0
Change in cash, due from banks and deposits with banks		(1,500)	2
Cash, due from banks and deposits with banks at beginning of period		4,516	3,021
Cash, due from banks and deposits with banks at end of period		3,016	3,023
Cash and due from banks (including segregated cash and other deposits)		16	23
Deposits with banks, net of allowance		3,000	3,000
Cash, due from banks and deposits with banks at end of period		3,016	3,023	4,516
Supplemental disclosure of cash flow information for continuing operations
Cash paid (received) during the period for income taxes		(1,437)	39
Cash paid during the period for interest		1,287	1,757
Non-cash investing activities
Transfers to loans HFS from loans		0	0
Reportable legal entities | CGMHI
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities of continuing operations		5,912	(53,782)
Cash flows from investing activities of continuing operations
Purchases of investments		0	0
Proceeds from sales of investments		0	0
Proceeds from maturities of investments		0	0
Change in loans		0	0
Proceeds from sales and securitizations of loans		0	0
Change in securities borrowed and purchased under agreements to resell		(14,084)	(29,475)
Changes in investments and advances—intercompany		(7,360)	(4,890)
Other investing activities		(15)	0
Net cash used in investing activities of continuing operations		(21,459)	(34,365)
Cash flows from financing activities of continuing operations
Dividends paid		(187)	0
Issuance of preferred stock		0	0
Redemption of preferred stock		0	0
Treasury stock acquired		0	0
Proceeds (repayments) from issuance of long-term debt, net		8,446	8,907
Proceeds (repayments) from issuance of long-term debt—intercompany, net		11,040	6,815
Change in deposits		0	0
Change in securities loaned and sold under agreements to repurchase		(9,152)	68,650
Change in short-term borrowings		3,358	1,074
Net change in short-term borrowings and other advances—intercompany		4,885	3,035
Other financing activities		0	(118)
Net cash provided by financing activities of continuing operations		18,390	88,363
Effect of exchange rate changes on cash and due from banks		0	0
Change in cash, due from banks and deposits with banks		2,843	216
Cash, due from banks and deposits with banks at beginning of period		20,112	16,441
Cash, due from banks and deposits with banks at end of period		22,955	16,657
Cash and due from banks (including segregated cash and other deposits)		6,642	3,728
Deposits with banks, net of allowance		16,313	12,929
Cash, due from banks and deposits with banks at end of period		22,955	16,657	20,112
Supplemental disclosure of cash flow information for continuing operations
Cash paid (received) during the period for income taxes		649	174
Cash paid during the period for interest		1,197	3,006
Non-cash investing activities
Transfers to loans HFS from loans		0	0
Reportable legal entities | Other Citigroup subsidiaries and eliminations
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities of continuing operations		16,222	31,717
Cash flows from investing activities of continuing operations
Purchases of investments		(201,567)	(207,701)
Proceeds from sales of investments		66,477	86,191
Proceeds from maturities of investments		75,195	53,909
Change in loans		(3,088)	7,943
Proceeds from sales and securitizations of loans		869	826
Change in securities borrowed and purchased under agreements to resell		(251)	(2,120)
Changes in investments and advances—intercompany		9,784	12,261
Other investing activities		(1,647)	(1,262)
Net cash used in investing activities of continuing operations		(54,228)	(49,953)
Cash flows from financing activities of continuing operations
Dividends paid		187	0
Issuance of preferred stock		0	0
Redemption of preferred stock		0	0
Treasury stock acquired		0	0
Proceeds (repayments) from issuance of long-term debt, net		(16,405)	(86)
Proceeds (repayments) from issuance of long-term debt—intercompany, net		(11,040)	(6,815)
Change in deposits		29,610	163,070
Change in securities loaned and sold under agreements to repurchase		31,444	(19,267)
Change in short-term borrowings		(1,410)	(5,967)
Net change in short-term borrowings and other advances—intercompany		(5,657)	3,791
Other financing activities		0	118
Net cash provided by financing activities of continuing operations		26,729	134,844
Effect of exchange rate changes on cash and due from banks		(443)	(972)
Change in cash, due from banks and deposits with banks		(11,720)	115,636
Cash, due from banks and deposits with banks at beginning of period		284,987	174,457
Cash, due from banks and deposits with banks at end of period		273,267	290,093
Cash and due from banks (including segregated cash and other deposits)		20,459	19,138
Deposits with banks, net of allowance		252,808	270,955
Cash, due from banks and deposits with banks at end of period		273,267	290,093	284,987
Supplemental disclosure of cash flow information for continuing operations
Cash paid (received) during the period for income taxes		2,964	2,330
Cash paid during the period for interest		2,061	3,988
Non-cash investing activities
Transfers to loans HFS from loans		961	1,036
Consolidating adjustments
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities of continuing operations		0	0
Cash flows from investing activities of continuing operations
Purchases of investments		0	0
Proceeds from sales of investments		0	0
Proceeds from maturities of investments		0	0
Change in loans		0	0
Proceeds from sales and securitizations of loans		0	0
Change in securities borrowed and purchased under agreements to resell		0	0
Changes in investments and advances—intercompany		0	0
Other investing activities		0	0
Net cash used in investing activities of continuing operations		0	0
Cash flows from financing activities of continuing operations
Dividends paid		0	0
Issuance of preferred stock		0	0
Redemption of preferred stock		0	0
Treasury stock acquired		0	0
Proceeds (repayments) from issuance of long-term debt, net		0	0
Proceeds (repayments) from issuance of long-term debt—intercompany, net		0	0
Change in deposits		0	0
Change in securities loaned and sold under agreements to repurchase		0	0
Change in short-term borrowings		0	0
Net change in short-term borrowings and other advances—intercompany		0	0
Other financing activities		0	0
Net cash provided by financing activities of continuing operations		0	0
Effect of exchange rate changes on cash and due from banks		0	0
Change in cash, due from banks and deposits with banks		0	0
Cash, due from banks and deposits with banks at beginning of period		0	0
Cash, due from banks and deposits with banks at end of period		0	0
Cash and due from banks (including segregated cash and other deposits)		0	0
Deposits with banks, net of allowance		0	0
Cash, due from banks and deposits with banks at end of period		0	0	$ 0
Supplemental disclosure of cash flow information for continuing operations
Cash paid (received) during the period for income taxes		0	0
Cash paid during the period for interest		0	0
Non-cash investing activities
Transfers to loans HFS from loans		$ 0	$ 0
[1]	Operating and finance lease right-of-use assets and lease liabilities represent non-cash investing and financing activities, respectively, and are not included in the non-cash investing activities presented here. See Note 22 to the Consolidated Financial Statements for more information and balances as of June 30, 2021.

Uncategorized Items - _IXDS

Label	Element	Value
Change in Accounting Principle, Type [Extensible Enumeration]	us-gaap_ChangeInAccountingPrincipleTypeExtensibleList	Change in Accounting Principle, Other [Member]
Accounting Standards Update [Extensible Enumeration]	us-gaap_AccountingStandardsUpdateExtensibleList	Accounting Standards Update 2016-13 [Member]