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