Banco Santander-Chile (BSAC) 20-F 26 Feb 21 2020 FY Annual report (foreign) Financial data

Document And Entity Information

Document And Entity Information	12 Months Ended
	Dec. 31, 2020shares
Document Information Line Items
Entity Registrant Name	BANCO SANTANDER CHILE
Document Type	20-F
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding	0
Amendment Flag	false
Entity Central Index Key	0001027552
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Well-known Seasoned Issuer	Yes
Document Period End Date	Dec. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Emerging Growth Company	false
Entity Shell Company	false
Document Annual Report	true
Document Shell Company Report	false
Document Transition Report	false
Entity File Number	1-14554
Entity Incorporation, State or Country Code	F3
Entity Interactive Data Current	Yes

Consolidated Statements of Fina

Consolidated Statements of Financial Position $ in Millions, $ in Millions	Dec. 31, 2020CLP ($)	Dec. 31, 2019CLP ($)
ASSETS
Cash and deposits in banks	$ 2,803,288	$ 3,554,520
Cash items in process of collection	452,963	355,062
Financial derivative contracts	9,032,085	8,148,608
Financial assets held for trading	133,718	270,204
Loans and account receivable at amortized cost	33,303,100	31,775,420
Loans and account receivable at fair value through other comprehensive income	69,331	66,065
Debt instrument at fair value through other comprehensive income	7,162,542	4,010,272
Equity instruments at fair value through other comprehensive income	548	482
Investments in associates and other companies	10,396	10,177
Intangible assets	82,537	73,389
Property, plant, and equipment	240,854	250,761
Right of use assets	147,997	157,572
Current taxes		11,648
Deferred taxes	516,490	451,388
Other assets	1,747,374	1,439,146
TOTAL ASSETS	55,703,223	50,574,714
LIABILITIES
Deposits and other demand liabilities	14,560,893	10,297,432
Cash items in process of being cleared	361,631	198,248
Obligations under repurchase agreements	969,808	380,055
Time deposits and other time liabilities	10,581,791	13,192,817
Financial derivative contracts	9,018,660	7,390,654
Interbank borrowings	6,328,599	2,519,818
Issued debt instruments	8,204,177	9,500,723
Other financial liabilities	184,318	226,358
Lease liabilities	149,585	158,494
Current taxes	12,977
Deferred taxes	129,493	99,157
Provisions	330,664	326,130
Other liabilities	1,165,853	2,806,325
TOTAL LIABILITIES	51,998,449	47,096,211
EQUITY
Attributable to the shareholders of the Bank:	3,620,091	3,398,870
Capital	891,303	891,303
Reserves	2,343,580	2,122,742
Valuation adjustments	(25,293)	(8,856)
Retained earnings	410,501	393,681
Retained earnings from prior years	27,171	(39,683)
Income for the year	547,614	619,091
Minus: Provision for mandatory dividends	(164,284)	(185,727)
Non-controlling interest	84,683	79,633
TOTAL EQUITY	3,704,774	3,478,503
TOTAL LIABILITIES AND EQUITY	$ 55,703,223	$ 50,574,714

Consolidated Statements of Inco

Consolidated Statements of Income $ in Millions	12 Months Ended
	Dec. 31, 2020CLP ($)$ / shares	Dec. 31, 2019CLP ($)$ / shares	Dec. 31, 2018CLP ($)$ / shares
OPERATING INCOME
Interest income	$ 2,232,327	$ 2,321,381	$ 2,244,317
Interest expense	(638,479)	(904,417)	(829,949)
Net interest income	1,593,848	1,416,964	1,414,368
Fee and commission income	451,162	498,658	484,463
Fee and commission expense	(183,884)	(211,572)	(193,578)
Net fee and commission income	267,278	287,086	290,885
Net income (expense) from financial operations	90,800	(78,165)	53,174
Net foreign exchange gain	58,997	279,857	51,908
Other operating income	8,206	13,001	23,129
Net operating profit before provision for loan losses	2,019,129	1,918,743	1,833,464
Provision for loan losses	(478,264)	(323,311)	(317,408)
NET OPERATING INCOME	1,540,865	1,595,432	1,516,056
Personnel salaries and expenses	(408,670)	(410,157)	(397,564)
Administrative expenses	(250,450)	(233,612)	(245,089)
Depreciation and amortization	(109,426)	(106,092)	(79,280)
Impairment of property, plant, and equipment	(638)	(2,726)	(39)
Other operating expenses	(77,806)	(49,303)	(32,342)
Total operating expenses	(846,990)	(801,890)	(754,314)
OPERATING INCOME	693,875	793,542	761,742
Income from investments in associates and other companies	1,388	1,146	1,324
Income from continuing operations before tax	695,263	794,688	763,066
Income tax expense	(142,533)	(175,074)	(167,144)
Result of continuing operations	552,730	619,614	595,922
Result of discontinued operations		1,699	3,771
NET INCOME FOR THE YEAR	552,730	621,313	599,693
Attributable to:
Shareholders of the Bank	547,614	619,091	595,333
Non-controlling interest	$ 5,116	$ 2,222	$ 4,360
Earnings per share from continued operations attributable to shareholders of the Bank:
Basic earnings (in Pesos per share) | (per share)	$ 2.906	$ 3.276	$ 3.139
Diluted earnings (in Pesos per share) | (per share)	2.906	3.276	3.139
Earnings per share from discontinued operations attributable to shareholders of the Bank:
Basic earnings (in Pesos per share) | (per share)		0.009	0.020
Diluted earnings (in Pesos per share) | (per share)		0.009	0.020
Earnings per share attributable to shareholders of the Bank:
Basic earnings (in Pesos per share) | (per share)	2.906	3.285	3.159
Diluted earnings (in Pesos per share) | (per share)	$ 2.906	$ 3.285	$ 3.159

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Consolidated Statements of Comprehensive Income [Abstract]
NET INCOME FOR THE YEAR	$ 552,730	$ 621,313	$ 599,693
Other comprehensive income that will not be reclassified to profit or loss
Equity instruments at fair value through other comprehensive income	(18)	(1)	(113)
Income tax related to the above	5		31
Total items that will not be reclassified to the income statements	(13)	(1)	(82)
Other comprehensive income that will be reclassified to profit or loss
Debt instruments at fair value through other comprehensive income	73,689	22,223	4,826
Cash flow hedge	(96,330)	(50,238)	13,365
Income tax related to the above	6,296	7,618	(4,903)
Total items that will be reclassified to the income statements	(16,345)	(20,397)	13,288
Other comprehensive income for the year, net of tax	(16,358)	(20,398)	13,206
TOTAL COMPREHENSIVE INCOME FOR THE YEAR	536,372	600,915	612,899
Attributable to:
Shareholders of the Bank	531,177	598,693	608,623
Non-controlling interests	$ 5,195	$ 2,222	$ 4,276

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - CLP ($) $ in Millions		Capital	Reserves and other retained earnings	Effects of merger of companies under common control	Fair value reserve	Cash flow hedge	Income tax effects	Retained earnings of prior years	Income for the year	Provision for mandatory dividends	Total attributable to shareholders of the Bank	Non-controlling interest	Total
Equity at Dec. 31, 2017		$ 891,303	$ 1,784,042	$ (2,224)	$ 459	$ (3,562)	$ 791	$ 41,267	$ 562,801	$ (168,840)	$ 3,106,037	$ 41,883	$ 3,147,920
Distribution of income from previous period								562,801	(562,801)
Equity		891,303	1,784,042	(2,224)	459	(3,562)	791	604,068		(168,840)	3,106,037	41,883	3,147,920
Impact of adopting IFRS 9					394		(19)	(82,367)			(81,992)		(81,992)
Restated opening balance under IFRS 9		891,303	1,784,042	(2,224)	853	(3,562)	772	521,701		(168,840)	3,024,045	41,883	3,065,928
Dividends distributions / withdrawals made								(423,611)		168,840	(254,771)	4	(254,767)
Transfer of retained earnings to reserves			141,204					(141,204)
Provision for mandatory dividends										(178,600)	(178,600)		(178,600)
Subtotal			141,204					(564,815)		(9,760)	(433,371)	4	(433,367)
Other comprehensive income					4,799	13,365	(4,874)				13,290	(84)	13,206
Result of continuous operations									591,563		591,563	4,360	595,923
Result of discontinuous operations									3,770		3,770		3,770
Subtotal					4,799	13,365	(4,874)		595,333		608,623	4,276	612,899
Equity at Dec. 31, 2018		891,303	1,925,246	(2,224)	5,652	9,803	(4,102)	(43,114)	595,333	(178,600)		46,163	3,245,460
Distribution of income from previous period								595,333	(595,333)
Equity		891,303	1,925,246	(2,224)	5,652	9,803	(4,102)	552,219		(178,600)		46,163	3,245,460
Purchase of Santander Consumer S.A.	[1]		(37,041)								(37,041)	31,437	(5,604)
Dividends distributions / withdrawals made								(355,141)		178,600	(176,541)		(176,541)
Transfer of retained earnings to reserves			236,761					(236,761)
Provision for mandatory dividends										(185,727)	(185,727)		(185,727)
Subtotal			199,720					(591,902)		(7,127)	(399,309)	31,437	(367,872)
Other comprehensive income					22,483	(50,238)	7,546				(20,209)	(189)	(20,398)
Result of continuous operations									617,392		617,392	2,222	619,614
Result of discontinuous operations									1,699		1,699		1,699
Subtotal					22,483	(50,238)	7,546		619,091		598,882	2,033	600,915
Equity at Dec. 31, 2019		891,303	2,124,966	(2,224)	28,135	(40,435)	3,444	(39,683)	619,091	(185,727)	3,398,870	79,633	3,478,503
Distribution of income from previous period								619,091	(619,091)
Equity		891,303	2,124,966	(2,224)	28,135	(40,435)	3,444	579,408		(185,727)	3,398,870	79,633	3,478,503
Dividends distributions / withdrawals made								(331,399)		185,727	(145,672)	(145)	(145,817)
Transfer of retained earnings to reserves			220,838					(220,838)
Provision for mandatory dividends										(164,284)	(164,284)		(164,284)
Subtotal			220,838					(552,237)		21,443	(309,956)	(145)	(310,101)
Other comprehensive income					73,561	(96,330)	6,332				(16,437)	79	(16,358)
Result of continuous operations									517,614		547,614	5,116	552,730
Result of discontinuous operations
Subtotal					73,561	(96,330)	6,332		547,614		531,177	5,195	536,372
Equity at Dec. 31, 2020		$ 891,303	$ 2,345,804	$ (2,224)	$ 101,696	$ (136,765)	$ 9,776	$ 27,171	$ 547,614	$ (164,284)	$ 3,620,091	$ 84,683	$ 3,704,774
[1]	The effect was generated by the acquisition of Santander Consumer S.A. See Note 2 Significant Event.

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Equity (Parentheticals) - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Total attributable to shareholders of the Bank	$ 552,093	$ 591,902	$ 564,815
Allocated to reserves	220,838	236,761	141,204
Allocated to dividends	$ 165,627	$ 355,141	$ 423,611
Percentage distributed	30.00%	60.00%	75.00%
Number of shares (in Shares)	188,446,126,794	188,446,126,794	188,446,126,794
Dividend per share (in pesos) (in Pesos per share)	$ 0.879	$ 1.885	$ 2.248
Extraordinary Shareholders Meeting [Member]
Total attributable to shareholders of the Bank	$ 552,093
Allocated to reserves	220,838
Allocated to dividends	$ 165,628
Percentage distributed	30.00%
Number of shares (in Shares)	188,446,126,794
Dividend per share (in pesos) (in Pesos per share)	$ 0.879

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of cash flows [abstract]
NET INCOME FOR THE YEAR	$ 552,730	$ 621,313	$ 599,693
Adjustments for non-cash items included in net income	(1,179,767)	(1,119,126)	(1,266,270)
Depreciation and amortization	109,426	106,092	79,280
Impairment of property, plant, and equipment	638	2,726	39
Provision for loan losses	553,190	406,024	405,889
Mark to market of trading investments	43,609	39,997	1,438
Income from investments in associates and other companies	(1,388)	(1,146)	(5,095)
Net gain on sale of assets received in lieu of payment	(5,934)	(5,613)	(7,106)
Provision on assets received in lieu of payment	1,456	1,809	816
Loss on sale of associate	20	126
Net gain on sale of property, plant and equipment	(865)	(2,456)	(2,490)
Net interest income	(1,593,848)	(1,416,964)	(1,414,368)
Net fee and commission income	(267,278)	(287,086)	(290,885)
Changes in deferred taxes	(28,465)	37,432	(25,517)
Other non-cash items	9,672	(67)	(8,271)
Increase/decrease in operating assets and liabilities	192,956	2,346,978	1,689,069
(Increase) of loans and accounts receivables from customers, net	(1,673,357)	(2,449,954)	(2,703,700)
Decrease (increase) of financial investments	(3,015,784)	(1,809,112)	588,918
Decrease (increase) of interbank loans	(4,078)	232	147,534
Decrease of assets received or awarded in lieu of payment	8,289	(1,743)	722
Increase of debits in customers checking accounts	3,249,540	1,298,976	521,476
(Decrease) increase of time deposits and other time liabilities	(2,611,026)	124,998	1,153,874
Increase (decrease) of obligations with domestic banks	(54,518)	271,620	(480)
Increase (decrease) of other demand liabilities or time obligations	842,080	257,039	451,775
Increase of obligations with foreign banks	(1,095,961)	459,572	90,754
(Decrease) increase of obligations with Central Bank of Chile	4,959,260		(5)
(Decrease) increase of obligations under repurchase agreements	589,753	331,510	(219,516)
Increase (decrease) in other financial liabilities	(42,040)	10,958	(26,630)
(Decrease) increase of other assets and liabilities	(1,850,030)	989,451	(872,264)
Redemption of letters of credit	(6,188)	(6,988)	(8,989)
Senior bond issuances	1,227,166	1,893,552	1,156,057
Redemption of mortgage bonds and payments of interest	(6,312)	(6,109)	(5,911)
Redemption of senior bonds and payments of interest	(2,571,384)	(714,783)	(289,837)
Interest received	2,232,327	2,321,381	2,244,317
Interest paid	(638,479)	(904,417)	(829,949)
Dividends received from investments in other companies	508	130	38
Fees and commissions received	451,162	498,658	484,463
Fees and commissions paid	(183,884)	(211,572)	(193,578)
Total cash flow (used in) provided by operating activities	(819,993)	1,855,586	1,022,492
B - CASH FLOWS FROM INVESTMENT ACTIVITIES:
Purchases of property, plant, and equipment	(50,613)	(57,390)	(68,329)
Sales of property, plant, and equipment	15,678	8,666	6,297
Sales of investments in associates		1,930
Purchases of investments in associates and other companies		(62,136)
Purchases of intangible assets	(35,170)	(32,860)	(29,563)
Total cash flow used in investment activities	(70,105)	(141,790)	(91,565)
C - CASH FLOW FROM FINANCING ACTIVITIES:
Dividends paid	(331,255)	(355,141)	(423,611)
Placement of subordinated bond	475,390
Lease obligation paid	(42,045)	(30,145)
Total cash flow used in financing activities	102,090	(385,286)	(423,611)
D – NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS DURING THE YEAR	(788,008)	1,328,510	507,316
E – EFFECTS OF FOREIGN EXCHANGE RATE FLUCTUATIONS	(28,706)	126,669	114,498
F - INITIAL BALANCE OF CASH AND CASH EQUIVALENTS	3,711,334	2,256,155	1,634,341
FINAL BALANCE OF CASH AND CASH EQUIVALENTS	2,984,620	3,711,334	2,256,155
Provision for loan losses for cash flow purposes	553,190	406,024	405,889
Recovery of loans previously charged off	(74,926)	(82,713)	(88,481)
Provision for loan losses – net	$ 478,264	$ 323,311	$ 317,408

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows (Parentheticals) - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Balance as of beginning		$ 432,798
Cash flow	$ (18,624)
Acquisition	39,394
Foreign currency exchange
UF Inflation effect	57,807
Fair value changes
Balance as of ending	632,089
Subordinated Bonds [Member]
Balance as of beginning		818,084
Cash flow	475,390
Acquisition
Foreign currency exchange
UF Inflation effect	64,065
Fair value changes
Balance as of ending	1,357,539
Paid Dividend [Member]
Balance as of beginning		(355,141)
Cash flow	(331,255)
Acquisition
Foreign currency exchange
UF Inflation effect
Fair value changes
Balance as of ending	(686,396)
Other Liabilities [Member]
Balance as of beginning		$ (30,145)
Cash flow	(42,045)
Acquisition	39,394
Foreign currency exchange
UF Inflation effect	(6,258)
Fair value changes
Balance as of ending	$ (39,054)

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
Disclosure of significant accounting policies [text block] [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES CORPORATE INFORMATION Banco Santander-Chile is a banking corporation (limited company) operating under the laws of the Republic of Chile, headquartered at Bandera N°140, Santiago. The corporation provides a broad range of general banking services to its customers, ranging from individuals to major corporations. Banco Santander-Chile and its subsidiaries (collectively referred to herein as the “Bank” or “Banco Santander-Chile”) offers commercial and consumer banking services, including (but not limited to) factoring, collection, leasing, securities and insurance brokering, mutual and investment fund management brokering, and investment banking. Banco Santander Spain controls Banco Santander-Chile through its holdings in Teatinos Siglo XXI Inversiones Ltda. and Santander Chile Holding S.A., which are controlled subsidiaries of Banco Santander Spain. As of December 31, 2020 Banco Santander Spain owns or controls directly and indirectly 99.5% of Santander Chile Holding S.A. and 100% of Teatinos Siglo XXI Inversiones Ltda. Banco Santander Spain, through its subsidiaries, has control over 67.18% of the Bank’s shares. a) Basis of preparation These Consolidated Financial Statements have been prepared in accordance with International Financial Reporting Standards (IFRS) as issued by the International Accounting Standards Board (IASB) (hereinafter referred to as IFRS). For purposes of these financial statements we use certain terms and conventions. References to “US$”, “U.S. dollars” and “dollars” are to United States dollars, references to “EUR” are to European Economic Community Euro, references to “CNY” are to Chinese Yuan, reference to “JPY” are to Japanese Yuan, references to “CHF” are to Swiss franc, references to “Chilean pesos”, “pesos” or “Ch$” are to Chilean pesos, and references to “UF” are to Unidades de Fomento. The UF is an inflation-indexed Chilean monetary unit with a value in Chilean pesos that changes daily to reflect changes in the official Consumer Price Index (“CPI”) of the Instituto Nacional de Estadísticas (the Chilean National Institute of Statistics) for the previous month. The UF is revalued in monthly cycles. Each day in the period beginning on the tenth day of the current month through the ninth day of the succeeding month, the nominal peso value of the UF is indexed up (or down in the event of deflation) in order to reflect a proportionate amount of the change in the Chilean Consumer Price Index during the prior calendar month. One UF is equaled to Ch$29,070.33 as of December 31, 2020 and Ch$28,309.94 as of December 31, 2019. In 2020, UF inflation was 2.7% The Notes to the Consolidated Financial Statements contain additional information to support the figures submitted in the Consolidated Statements of Financial Position, Consolidated Statements of Income, Consolidated Statements of Comprehensive Income, Consolidated Statements of Changes in Equity and Consolidated Statements of Cash Flows for the period. b) Basis of preparation for the Consolidated Financial Statements The Consolidated Financial Statements for the years ended December 31, 2020, 2019 and 2018, incorporate the financial statements of the entities over which the Bank has control (including structured entities); and includes the adjustments, reclassifications and eliminations needed to comply with the accounting and valuation criteria established by IFRS. Control is achieved when the Bank: I. has power over the investee; II. is exposed, or has rights, to variable returns from its involvement with the investee; and III. has the ability to use its power to affect its returns. The Bank reassesses whether or not it controls an investee if facts and circumstances indicate that there are changes to one or more of the three elements of control listed above. When the Bank has less than a majority of the voting rights of an investee, it has power over the investee when the voting rights are sufficient to give it the practical ability to direct the relevant activities over the investee unilaterally. The Bank considers all relevant facts and circumstances in assessing whether or not the Bank’s voting rights in an investee are sufficient to give it power, including: ● the size of the Bank’s holding of voting rights relative to the size and dispersion of holdings of the other vote holders; ● potential voting rights held by the Bank, other vote holders or other parties; ● rights arising from other agreements; and ● any additional facts and circumstances that indicate that the Bank has, or does not have, the current ability to direct the relevant activities at the time that decisions need to be made, including voting patterns at previous shareholders’ meetings. Consolidation of a subsidiary begins when the Bank obtains control over the subsidiary and ceases when the Bank loses control over the subsidiary. Specifically, income and expenses of a subsidiary acquired or disposed of during the year are included in the Consolidated Statements of Income and Comprehensive Income from the date the Bank gains control until the date when the Bank ceases to control the subsidiary. Profit or loss and each component of other comprehensive income are attributed to the owners of the Bank and to the non-controlling interests. Total comprehensive income of subsidiaries is attributed to the owners of the Bank and to the non-controlling interests even if this results in the non-controlling interests having a deficit in certain circumstances. When necessary, adjustments are made to the financial statements of the subsidiaries to ensure their accounting policies are consistent with the Bank’s accounting policies. All intragroup assets, liabilities, equity, income, expenses and cash flows relating to transactions between consolidated entities are eliminated in full on consolidation. Changes in the consolidated entities ownership interests in subsidiaries that do not result in a loss of control over the subsidiaries are accounted for as equity transactions. The carrying values of the Bank’s equity and the non-controlling interests’ equity are adjusted to reflect the changes to their relative interests in the subsidiaries. Any difference between the amount by which the non-controlling interests are adjusted and the fair value of the consideration paid or received is recognized directly in equity and attributed to owners of the Bank. In addition, third parties’ shares in the Bank’s consolidated equity are presented as “Non-controlling interests” in the Consolidated Statements of Changes in Equity. Their share in the income for the year is presented as “Attributable to non-controlling interest” in the Consolidated Statements of Income. The following companies are considered entities controlled by the Bank and are therefore within the scope of consolidation: i. Entities controlled by the Bank through participation in equity Name of the Subsidiary Percent ownership share As of December 31, Place of Incorporation and operation 2020 2019 2018 Direct Indirect Total Direct Indirect Total Direct Indirect Total Main Activity % % % % % % % % % Santander Corredora de Seguros Limitada Insurance brokerage Santiago, Chile 99.75 0.01 99.76 99.75 0.01 99.76 99.75 0.01 99.76 Santander Corredores de Bolsa Limitada Financial instruments brokerage Santiago, Chile 50.59 0.41 51.00 50.59 0.41 51.00 50.59 0.41 51.00 Santander Asesorias Financieras Limitada (1) Securities brokerage Santiago, Chile 99.03 - 99.03 99.03 - 99.03 99.03 - 99.03 Santander S.A. Sociedad Securitizadora Purchase of credits and issuance of debt instruments Santiago, Chile 99.64 - 99.64 99.64 - 99.64 99.64 - 99.64 Klare Corredora de Seguros S.A. (2) Insurance brokerage Santiago, Chile 50.10 - 50.10 50.10 - 50.10 - - - Santander Consumer Chile S.A. (3) Financing Santiago, Chile 51.00 - 51.00 51.00 - 51.00 - - - Sociedad operadora de Tarjetas de Pago Santander Getnet Chile S.A. (4) Card operator Santiago, Chile 99.99 0.01 100.00 - - - - - - The detail of non-controlling participation on all the remaining subsidiaries can be seen in Note 24– Non-controlling interest. (1) On December 18, 2019, Santander Agente de Valores Limitada changed its business name and the company’s object, to Santander Asesorías Financieras Limitada, and offering financial advice. (2) On October 19, 2019 Klare Corredora de Seguros S.A. was created as a digital insurance brokerage and supporting banking business company and thus is subject to banking regulations. The Banks owns the 50,10% of the company’s capital share. (3) On November 15, 2019, Financial Market Commission (FMC) authorized Banco Santander to acquire the 51% of the Santander Consumer Chile S.A. capital share from SK Berge (49%) and Banco Santander S.A. (2%). The sale was completed on November 27, 2019. (4) On July 6, 2020, Banco Santander registered as a new subsidiary and business support company named “Sociedad Operadora de Tarjeta de Pago Santander Getnet Chile S.A”. Entities controlled by the Bank through other considerations The following companies have been consolidated based on the determination that the Bank has control as previously defined above and in accordance with IFRS 10, Consolidated Financial Statements: - Santander Gestión de Recaudación y Cobranza Limitada (collection services) - Bansa Santander S.A. (financing revolving inventory lines to automotive dealers) (1) - Multiplica SpA (Development card incentive programs) (2) (1) Since December 2019, Bansa Santander S.A.(“Bansa”) modified it activity to financing revolving inventory lines to automotive dealers. Accordingly, Consumer has started to guide relevant activities of Bansa, and therefore it has begun to consolidate. (2) On October 4, 2019 Multiplica Spa was created as a supporting banking business company. In accordance with IFRS 10 Consolidated Financial Statement, the Bank controls the entity, since the relevant activities are addressed by the Bank, and the Bank is exposed, or has rights, to variable returns from its involvement with the investee. iii. Associates An associate is an entity over which the Bank has significant influence. Significant influence, in this case, is defined as the power to participate in the financial and operating policy decisions of the investee but is not control or joint control over those policies. An investment in an associate is accounted for using the equity method from the date on which the investee becomes an associate. The following companies are considered “Associates” in which the Bank accounts for its participation using the equity method: Percentage of ownership share As of December 31, Place of 2020 2019 2018 Associates Main activity Incorporation and % % % operation Redbanc S.A. (*) ATM services Santiago, Chile - - 33.43 Transbank S.A. (*) Debit and credit card services Santiago, Chile - - 25.00 Centro de Compensación Automatizado Electronic fund transfer and compensation services Santiago, Chile 33.33 33.33 33.33 Sociedad Interbancaria de Depósito de Valores S.A. Delivery of securities on public offer Santiago, Chile 29.29 29.29 29.29 Cámara Compensación de Alto Valor S.A. Payments clearing Santiago, Chile 15.00 15.00 15.00 Administrador Financiero del Transantiago S.A. Administration of boarding passes to public transportation Santiago, Chile 20.00 20.00 20.00 Sociedad Nexus S.A. (*) Credit card processor Santiago, Chile - - 12.90 Servicios de Infraestructura de Mercado OTC S.A. Administration of the infrastructure for the financial market of derivative instruments Santiago, Chile 12.48 12.48 12.48 (*) The Bank is in process to sell its share participation on Redbanc S.A. and Transbank S.A. therefore it has been classified in accordance to IFRS 5 “Non-current Assets Held for Sale and Discontinued Operations” as investment available for sale. Otherwise its share participation in Nexus S.A., has been sold. See Note N°38. In the case of Cámara Compensación de Pagos Alto Valor S.A., Banco Santander-Chile has a representative on the Board of Directors. As per the definition of associates, the Bank has concluded that it exerts significant influence over those entities. In the case of Servicios de Infraestructura de Mercado OTC S.A.The Bank participates, through its executives, actively in the administration and in the process of organization, which is why the Administration has concluded that it exerts significant influence on it. c) Non-controlling interest Non-controlling interest represents the portion of net income and net assets which the Bank does not own, either directly or indirectly. It is presented as “Attributable to non-controlling interest” separately in the Consolidated Statements of Income, and separately from shareholders’ equity in the Consolidated Statements of Financial Position. In the case of entities controlled by the Bank through other considerations, income and equity are presented in full as non-controlling interest, since the Bank controls them, but does not have any ownership expressed as a percentage. d) Reporting segments Operating segments are components of an entity: i. that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses from transactions with other components of the same entity); ii. whose operating results are regularly reviewed by the entity’s chief executive officer, who makes decisions about resources allocated to the segment and assess its performance; and iii. for which discrete financial information is available. Two or more segments can be combined only if aggregation is consistent with International Financial Reporting Standard 8 “Operating Segments” (IFRS 8) and the segments have similar economic characteristics and are similar in each of the following respects: i. the nature of the products and services; ii. the nature of the production processes; iii. the type or class of customers that use their products and services; iv. the methods used to distribute their products or services; and v. if applicable, the nature of the regulatory environment, for example, banking, insurance, or public utilities. The Bank reports separately on each operating segment that exceeds any of the following quantitative thresholds: i. its reported revenue, from both external customers and intersegment sales or transfers, is 10% or more of the combined internal and external revenue of all the operating segments. ii. the absolute amount of its reported profit or loss is 10% or more of the greater in absolute amount of: (i) the combined reported profit of all the operating segments that did not report a loss; (ii) the combined reported loss of all the operating segments that reported a loss. iii. its assets represent 10% or more of the combined assets of all the operating segments. Operating segments that do not meet any of the quantitative threshold may be treated as segments to be reported, in which case the information must be disclosed separately if management believes it could be useful for the users of the Consolidated Financial Statements. Information about other business activities of the operating segments not separately reported is combined and disclosed in the “Other segments” category. e) Functional and presentation currency According to International Accounting Standard (IAS) 21 “The Effects of Changes in Foreign Exchange Rates”, the Chilean peso, which is the currency of the primary economic environment in which the Bank operates and the currency which influences its costs and revenue structure, has been defined as the Bank’s functional and presentation currency. Accordingly, all balances and transactions denominated in currencies other than the Chilean Peso are treated as “foreign currency”. The Bank maintains its accounting records and prepares its financial statements in Chilean pesos. f) Foreign currency transactions The Bank performs transactions in foreign currencies, mainly in U.S. dollar. Assets and liabilities denominated in foreign currencies, held by the Bank and its subsidiaries are translated to Chilean pesos at the representative market exchange rate of the month for the reported period; the rate used was Ch$712.47 as of December 31, 2020 (Ch$747.37 per US$1 as of December 31, 2019). The amounts of net foreign exchange gains and losses includes recognition of the effects that exchange rate variations have on assets and liabilities denominated in foreign currencies and the profits and losses on foreign exchange spot and forward transactions undertaken by the Bank. g) Classification and measurement of financial instrument – under IFRS 9 (from January 1, 2018) Financial instruments must be classified and measured in accordance with IFRS 9 starting from January 1, 2018, which established guidance for the financial reporting of financial assets and financial liabilities that will present relevant and useful information to users of financial statements for their assessment of the amounts, timing and uncertainty of an entity’s future cash flows. I. Classification of financial instrument i) Classification of financial assets Financial assets are classified into a measurement category based on both the Bank’s business model for managing the financial asset and the contractual cash flow characteristics of the financial asset. Contractual cash flow assessment determines if the cash flows from the financial asset meet the SPPI (solely payment of principal and interest) criterion, i.e., whether the contractual terms of the financial asset give rise, on specific dates, to cash flows that are solely payments of principal and interest. Principal is the fair value of the financial assets at initial recognition, and interest is the consideration for the time value of money, the credit risk associated with the principal outstanding, and also may include liquidity risk, administrative cost and profit margin. For classification process the Bank perform the SPPI test, which assesses the contractual term to identify whether they meet SPI criterion, i.e., the contract is a basic lending arrangement. The Bank applies judgement and considers relevant factors such as currency in which the financial asset is denominated, and period for which the interest rate is set. Business model refers to how the Bank manages its financial assets in order to generate cash flows. The Bank determined its business model on initial application of IFRS 9 at the level that best reflects how it manages groups of financial assets to achieve its business objective. The Banks’s business model is not assessed on an instrument-by- instrument basis, but at a higher level of aggregated portfolio and is based on observable factors such as: performance of the financial assets, the risk that affect the performance, and the expected frequency, value and timing of sales. In accordance with IFRS 9 the business models are: ● Held to collect business model (HTC) - financial assets that are held within a business model whose objective is to hold assets in order to collect contractual cash flows are managed to realize cash flows by collecting contractual payments over the life of the instrument, under this business model sales made when there is an increase in the credit risk, or to manage credit concentration risk are not inconsistent with a business model whose objective is to hold financial assets to collect contractual cash flows. ● Held to collect and sell (HTC&S) - financial assets under this business model achieve the objective by both collecting contractual cash flows and selling financial assets, then involve a greater frequency and value of sales than HTC business model. ● Other business model - financial assets held in this business has the objective of realizing cash flows through the sale of the assets. The Bank makes decisions based on the assets’ fair values and manages the assets to realize those fair values. ii) Classification of financial liabilities The Bank classified all financial liabilities as subsequently measured at amortized cost, except for derivatives that are liabilities, which are measured at fair value through profit or loss. iii) Reclassification Reclassification of financial assets is required if, and only if, the objective of the Bank’s business model for managing those financial assets changes. Financial liabilities cannot be reclassified. II. Measurement of financial instruments i) Initial measurement On initial recognition, financial assets and financial liabilities are measured at the transaction price, i.e. the fair value of the consideration given or received (IFRS 13). In the case of financial instruments not at fair value through profit or loss, transaction costs are directly attributable to the acquisition or issue of the financial asset or financial liability. ii) Subsequent measurement- financial assets After initial recognition, the Bank shall measure a financial asset at: (a) Amortized cost Financial assets that are held in a business model to collect the contractual cash flows and contain contractual terms that give rise on specific dates to cash flows that are SPPI, are measured at amortized cost. The effective interest method is used in the calculation of the amortized cost of a financial asset or a financial liability and in the allocation and recognition of the interest revenue or interest expense in profit or loss over the relevant period. The effective interest rate (EIR) is the rate that exactly discounts estimated future cash payments or receipts through the expected life of the financial asset or financial liability to the gross carrying amount of a financial asset or to the amortized cost of a financial liability. (b) Fair value through other comprehensive income (FVOCI) Financial assets that are debt instruments held in a business model that is achieved by both collecting contractual cash flows and selling, and that contain contractual terms that give rise on specific dates to cash flows that are SPPI, are measured at FVOCI. They are subsequently remeasured at fair value and changes therein (except for those relating to impairment, interest income and foreign currency exchange gains and losses) are recognized in other comprehensive income, until the assets are sold. Upon disposal, the cumulative gain and losses in OCI are recognized in the income statements. (c) Fair value through profit or loss (FVTPL) Financial assets that do not contain contractual terms that give rise on specified dates to cash flows that are SPPI, or if the financial assets, or if the financial asset is not held in a business model that is either (i) a business model to collect the contractual cash flows or (ii) a business model that is achieved by both collecting contractual cash flows and selling. Financial assets held for trading are recognized at fair value through profit or loss, likewise derivatives contracts for trading purposes. (d) Equity instruments For certain equity instruments, the Bank may make an irrevocable election to present subsequent changes in the fair value of the instrument in other comprehensive income, except for dividend income which is recognized in profit or loss. Gains or losses on derecognition of these equity instruments are not transferred to profit or loss. iii) Subsequent measurement- financial liabilities After initial recognition, the Bank shall measure a financial liability at amortized cost. III. Derecognition of financial assets and liabilities Financial assets are derecognized when, and only when: ● the contractual rights to the cash flows from the financial asset expire, or ● the Bank transfers substantially all the risks and rewards of ownership of the financial asset, and therefore the Bank derecognizes the financial asset and recognize separately any rights and obligations created or retained in the transfer. In some cases, the Bank enters into transactions for which it retains the contractual rights to receive the cash flows of the financial asset, but assumes a contractual obligation to pay the cash flows in an arrangement that meets all the conditions required, i.e. the Bank only transfers collected amounts from original assets, selling or pledging original assets is prohibited, and the Bank has the obligation to remit cash flows collected without material delay. When a financial asset is sold and the Bank simultaneously agrees to repurchase it (or an asset that is substantially the same) at a fixed price on a future date, the Bank continues to recognize the financial assets in their entirety in the statements of financial position because it retains substantially all of the risks and rewards of ownership. The cash consideration received is recognized as a financial asset and a financial liability is recognized for the obligation to pay the repurchase price. Financial liabilities are derecognized when, and only when, they are extinguished, cancelled or expired. IV. Contingent loan The Bank issues contingent liabilities (including letters of credit, foreign letters of credit and performance guarantee) and loan commitments. Contingent liabilities and undrawn loan commitments are commitments under which, over the duration of the commitment, the Bank is required to provide a loan with pre-specified term to the customer. The nominal contractual loan value, when the loan agreed to be provided is on market terms, is not recorded in the statements of financial position. The related ECL allowances are disclosed in Note 22. V. Offsetting of financial instruments Financial asset and liability balances are offset, i.e., reported in the Consolidated Statements of Financial Position at their net amount, only if there is a legally enforceable right to offset the recorded amounts and the Bank intends either to settle them on a net basis or to realize the asset and settle the liability simultaneously. As of December 31, 2020 and 2019 the Bank does not have balance offsetting of financial instruments. h) Definitions and classification of financial instruments – under IAS 39 (prior to January 1, 2018) i. Definitions A “financial instrument” is any contract that gives rise to a financial asset of one entity, and a financial liability or equity instrument of another entity. An “equity instrument” is a legal transaction that evidences a residual interest in the assets of an entity deducting all of its liabilities. A “financial derivative” is a financial instrument whose value changes in response to the changes in an underlying observable market variable (such as an interest rate, a foreign exchange rate, a financial instrument’s price, or a market index, including credit ratings), whose initial investment is very small compared with other financial instruments having a similar response to changes in market factors, and which is generally settled at a future date. “Hybrid financial instruments” are contracts that simultaneously include a non-derivative host contract together with a financial derivative, known as an embedded derivative, which is not separately transferable and has the effect that some of the cash flows of the hybrid contract vary in a way similar to a stand-alone derivative. ii. Classification of financial assets for measurement purposes Financial assets are classified into the following specified categories: trading investments at fair value through profit or loss (FVTPL), ‘held to maturity investments’, ‘available for sale investments (AFS)’ and ‘loans and accounts receivable from customers. The classification depends on the nature and purpose of the financial assets and is determined at the time of initial recognition. All regular purchases or sales of financial asset are recognized and derecognized on a trade basis. Regular way purchases or sales of financial assets require delivery of the asset within the time frame established by regulation or convention in the marketplace. Effective interest method The effective interest method is a method of calculating the amortized cost of a debt instrument and of allocating interest income over the relevant period. The effective interest rate is the rate that exactly discounts estimated future cash receipts (including all fees and points paid or received that form an integral part of the effective interest rate, transaction costs and other premiums or discounts) through the expected life of the debt instrument, or, where appropriate, a shorter period, to the net carrying amount on initial recognition. Income is recognized on an effective interest basis for loans and accounts receivables other than those financial assets classified as at fair value through profit or loss. Financial assets FVTPL – trading investment Financial assets are classified as FVTPL when the financial asset is either held for trading or they are designated as at fair value through profit or loss. A financial asset is classified as held for trading if: ● it has been acquired principally for the purpose of selling it in the near term; or ● on initial recognition it is part of a portfolio of identified financial instruments that the Bank manages together and has a recent actual pattern of short-term profit-taking; or ● it is a derivative that is not designated and effective as a hedging instrument. A financial asset other than a financial asset held for trading may be designated as FVTPL upon initial recognition if: such designation eliminates or significantly reduces a measurement or recognition inconsistency that would otherwise arise; or ● the financial asset forms part of a group of financial assets or financial liabilities or both, which is managed and its performance is evaluated on a fair value basis, in accordance with the Bank’s documented risk management or investment strategy, and information about the grouping is provided internally on that basis; or ● it forms part of a contract containing one or more embedded derivatives, and IAS 39 permits the entire combined contract to be designated as FVTPL. Financial assets at FVTPL are stated at fair value, with any gains or losses arising on remeasurement recognized in profit or loss. The net gain or loss recognized in profit or loss incorporates any dividend or interest earned on the financial asset and is included in the ‘net income (expense) from financial operations’ line item. Held to maturity investments Held-to-maturity investments are non-derivative financial assets with fixed or determinable payments and fixed maturity dates that the Bank has the positive intent and ability to hold to maturity. Subsequent to initial recognition, held-to-maturity investments are measured at amortized cost using the effective interest method less any impairment. Available for sale investments (AFS investments) AFS investments are non-derivatives that are either designated as AFS or are not classified as (a) loans and accounts receivable from customers, (b) held-to-maturity investments or (c) financial assets at fair value through profit or loss (trading investments). Financial instruments held by the Bank that are traded in an active market are classified as AFS and are stated at fair value at the end of each reporting period. The Bank also has investments in financial instruments that are not traded in an active market but that are also classified as AFS investments and stated at fair value at the end of each reporting period (because the Bank considers that fair value can be reliably measured). Changes in the carrying amount of AFS monetary financial assets relating to changes in foreign currency rates, interest income calculated using the effective interest method and dividends on AFS equity investments are recognized in profit or loss. Other changes in the carrying amount of available for sale investments are recognized in other comprehensive income and accumulated under the heading of “Valuation Adjustment”. When the investment is disposed of or is determined to be impaired, the cumulative gain or loss previously accumulated in the investments revaluation reserve is reclassified to profit or loss. Dividends on AFS equity instruments are recognized in profit or loss when the Bank’s right to receive the dividends is established. The fair value of AFS monetary financial assets denominated in a foreign currency is determined in that foreign currency and translated as the described in f) above. The foreign exchange gains and losses that are recognized in profit or loss are determined based on the amortized cost of the monetary asset. Loans and accounts receivable from customers Loans and accounts receivable from customers are non-derivative financial assets with fixed or determinable payments that are not quoted in an active market. Loans and accounts receivables from customers (

Significant Events

Significant Events	12 Months Ended
	Dec. 31, 2020
Significant Events Explanatory [Abstract]
SIGNIFICANT EVENTS	SIGNIFICANT EVENTS As of December 31, 2020, the following significant events have occurred and affected the Bank’s operation and Consolidated Financial Statements. a) The Board On March 23, 2020, at the extraordinary session of the Board of Directors, the members agreed to amend the date of the Ordinary Shareholders’ Meeting originally scheduled for April 21, 2020 and set a new date for April 30, 2020, with the object of proposing a new profit distribution and payment of dividends, changing the 60% originally proposed to 30% of retained earnings as of December 31, 2019 (equivalent to $0.87891310 Chileans pesos per share), and propose that 30% of the earnings for the year 2019 will be classified as retained earnings, and the remaining 40% will be used to increase the Bank’s reserves. In accordance with Chilean laws, the Board of Directors of Banco Santander agreed, on the session held on October 21, 2020, to call an Extraordinary Shareholders’ Meeting for November 26, 2020 in order to discuss the proposed distribution of a dividend of $0.87891310 Chilean pesos per share, corresponding to 30% of the profits for the year 2019, which are classified as retained profits in the Bank’s equity, taking into account that, the ratio between the Bank’s regulatory capital and its risk-weighted assets reached 15.13%, and the ratio between basic capital and its risk-weighted assets was 10.70% as of September 30, 2020. b) Shareholders’ meeting At the extraordinary Shareholders’ Meeting of Banco Santander held on April 30, 2020, the members approved the Consolidated Financial Statements for 2019, and agreed to distribute 30% of the net profits for 2019 (“Net income attributable to shareholders of the Bank “), which amounted to $552,093 million, which correspond to a dividend of $0.87891310 Chilean pesos per share. Likewise, the members agreed to increase the Bank’s reserves by 40% and the remaining 30% will be classified as retained earnings from previous years. Board election: the members approved the election of Messrs. Alfonso Gómez, Claudio Melandri, Rodrigo Vergara, Félix de Vicente, Orlando Poblete, Juan Pedro Santa María, Ana Dorrego, Rodrigo Echenique and Lucía Santa Cruz, as Directors, and Blanca Bustamante and Oscar von Chrismar, as Alternate Directors, elected for a period of three years until the next renewal of the entire Board of Directors. Appointment of external auditors: the members approved PricewaterhouseCoopers Consultores Auditores SpA as external auditors for the 2020 financial year. At the Extraordinary Shareholders’ Meeting of Banco Santander held on November 26, 2020, the members agreed to distribute a dividend of $0.87891310 Chilean pesos per share, corresponding to 30% of the retained earnings for 2019, which was paid on the following banking business day after the meeting date. c) COVID-19 COVID-19 is a highly contagious infectious disease, which was first detected in Wuhan, China in December 2019. Subsequently, on March 11, 2020, the World Health Organization (WHO) declared it a pandemic. In Chile, on March 18, 2020, the President of the Republic decreed a state of national catastrophe to implement health and economic measures. Because of the pandemic, the economic activity and employment has been affected and hence the government and government entities and regulatory entities have implemented support measures to mitigate serious impact of the pandemic. On March 23, 2020, the FMC issued a package of measures aimed at granting greater flexibility to the financial system. In addition, the FMC asked for measures to facilitate the attention of customers and users and maintain adequate risk management policies and establish prudent dividend policy, given the situation. On April 9, 2020, the Central Bank of Chile (BCCh) announced new measures to support the operation of financial markets. On April 12, 2020 the government issued its first economic emergency plan, to protect families and employment, help our entrepreneurs, SMEs and businessmen through credit lines with government guarantees”.The largest measure was to provide additional funds to the Guarantee Fund for Small Companies (Fogape), a state fund that guarantees loans, leases and other credits provided to small businesses. The vaccination plan against COVID-19 began on December 24, 2020, with the first arrival of 9,750 doses of the vaccine from the Pfizer BioNtech laboratory. As of December 31, 2020, Chile had received 154,050 doses of the Pfizer BioNtech vaccine, for the vaccination plan in all regions of the country, and will receive more than 6.5 million doses of the AstraZeneca / Oxford vaccine during the first quarter of 2021 and more than 10 million of Coronavac vaccines, to continue the vaccination plan in its next stages. At the time of publication of these financial statements, 2,320,696 people have been vaccinated in Chile, which represents 13% of the population. During the first quarter of 2021, it is expected to vaccinate around 5 million people and reach 80% of the population, that is, approximately 15 million people, by the end of the first half of 2021. d) Laws and standards On February 24, 2020, the law that modernizes the tax system was published in the Official Gazette. This new regulation implies modifications to the Income Tax Law, to the Value-Added Tax (VAT) and to the Tax Code, among other aspects. On March 30, 2020, the FMC approved flexible deadlines for the Basel III implementation process. In coordination with Chilean Central Bank, decided to postpone for one more year the capital requirements implementation and keep the actual regulatory framework for banks’ capital requirements in effect until December 2021. In March 2020, the Chilean Central Bank announced the creation of two credit lines. The first line of credit is a facility available conditionally on loan growth (the “FCIC”) to ensure that banks continue to finance households and businesses in Chile, with maturities of up to 4 years. The second line of credit, the LCL, is unsecured and may have maturities of up to 2 years. See more details in Note N°17, letter a). On May 29, 2020, Law No. 21,234, which limits the legal responsibility of holders or users of payment cards and electronic transactions in the event of loss, theft, or fraud, was published. The law establishes that the issuer will always be responsible for the evidence related to operations that the user denies having authorized. Just the operations’ record will not necessarily be enough to demonstrate that these were authorized by the user, nor that the user acted with fault or carelessness attributable to them. The issuer must proceed to cancel the charges or restitute the funds within a period of 5 business days from the date of the claim if the amount is less than 35 UF or 7 additional days for higher amounts. Additionally, issuers are prohibited from offering insurance covering risks that must be assumed by the issuer in accordance with the new law. As a result of the new law’s application, the Bank has shown a decrease in its recurring income from commissions associated with insurance collection or selling and has proceeded to reduce the maintenance fees for its account plans. On June 9, 2020, the Law that regulates the financial portability of clients was published in the Official Gazette, and became effective 90 days after its publication (September 8, 2020). This Law’s main purpose is to facilitate the clients’ transfer between financial providers. The Bank adjusted its processes and controls to comply with the new Law. e) Subsidiaries On March 20, 2020, Klare Corredora de Seguros S.A. was notified by the FMC about its registration in the Insurance Trade Registry as a General and Life Insurance Broker. Currently the company operates under a 100% digital Insurance Broker modality. A Material Event published on July 6, 2020, Banco Santander Chile informed, prior authorization of the FMC through Resolution No. 3223 dated June 30 2020, that it had registered a new company named “Sociedad Operadora de Tarjeta de Pago Santander Getnet Chile S.A.”, whose purpose is to conduct operations of credit, debit and prepaid cards in accordance with the Chilean Central Bank and the FMC regulations. This is a banking support and subsidiary company of Banco Santander with a 99.99% share participation (Santander Asesorias Financieras Limitada has a 0.01% share participation). A Material Event published on December 22, 2020, disclosed that “Sociedad Operadora de Tarjetas de Pago Santander Getnet Chile S.A.” called for an Extraordinary Shareholders’ Meeting for January 7, 2021. The purpose was to discuss the monetary contribution and the analysis and appraisal of the assets that shareholders will contribute, account for the operations in scope of Title XVI of Law 18,046, and other social interest agreements and granting powers to comply with the resolutions reached in this meeting. On December 30, 2020, Banco Santander-Chile, made a capital contribution to “Sociedad Operadora de Tarjeta de Pago Santander Getnet Chile S.A.”. f) Bods issued at December 31, 2020 f.1 Senior bonds As of December 31, 2020 the Bank has issued senior bonds for an amount of USD742,500,000. The debt issuance information is included in Note 18. Series Currency Term Issuance Issuance Amount Maturity Bonos USD USD 5 years 2.70% 01-07-2020 750,000,000 01-07-2025 Total USD 750,000,000 f.2 Subordinated bonds As at December 31, 2020 the Bank has issued subordinated bonds for an amount of USD200,000,000 and UF5,000,000. The debt issuance information is included in Note 18. Series Currency Term Issuance rate (annual) Issuance Amount Maturity Bonos USD USD 10 years 3.79% 01-21-2020 200,000,000 01-21-2030 Total USD 200,000,000 USTDW20320 UF 15 years and 3 months 3.50% 03-01-2020 5,000,000 09-01-2035 Total UF 5,000,000

Reporting Segments

Reporting Segments	12 Months Ended
	Dec. 31, 2020
Disclosure of entity's operating segments [text block] [Abstract]
REPORTING SEGMENTS	REPORTING SEGMENTS The Bank manages and measures the performance of its operations by business segments. The information disclosed in this note is not necessarily comparable to that of other financial institutions, since it is based on management’s internal information system by segment. Inter-segment transactions are conducted under normal arm’s length commercial terms and conditions. Each segment’s assets, liabilities, and income include items directly attributable to the segment to which they can be allocated on a reasonable basis. Under IFRS 8, the Bank has aggregated operating segments with similar economic characteristics according to the aggregation criteria specified in the standard. A reporting segment consists of clients that are offered differentiated but, considering how their performance is measured, are homogenous services based on IFRS 8 aggregation criteria, thus they form part of the same reporting segment. Overall, this aggregation has no significant impact on the understanding of the nature and effects of the Bank’s business activities and the economic environment. The Bank has the reportable segments noted below: Retail Banking Consists of individuals and small to middle-sized entities (SMEs) with annual income less than Ch$2,000 million. This segment gives customers a variety of services, including consumer loans, credit cards, automobile loans, commercial loans, foreign exchange, mortgage loans, debit cards, checking accounts, savings products, mutual funds, stockbrokerage, and insurance brokerage. Additionally, the SME clients are offered government-guaranteed loans, leasing and factoring. Middle-market This segment is made up of companies and large corporations with annual sales exceeding Ch$2,000 million. It serves institutions such as universities, government entities, local and regional governments and companies engaged in the real estate industry who carry out projects to sell properties to third parties and annual sales exceeding Ch$800 million with no upper limit. The companies within this segment have access to many products including commercial loans, leasing, factoring, foreign trade, credit cards, mortgage loans, checking accounts, transactional services, treasury services, financial consulting, savings products, mutual funds, and insurance brokerage. Also companies in the real estate industry are offered specialized services to finance projects, chiefly residential, with the aim of expanding sales of mortgage loans. Corporate & Investment Banking (CIB) This segment consists of foreign and domestic multinational companies with sales over Ch$10,000 million. The companies within this segment have access to many products including commercial loans, leasing, factoring, foreign trade, credit cards, mortgage loans, checking accounts, transactional services, treasury services, financial consulting, investments, savings products, mutual funds and insurance brokerage. This segment also consists of a Treasury Division which provides sophisticated financial products, mainly to companies in the Middle-market and Global Investment Banking segments. These include products such as short-term financing and fund raising, brokerage services, derivatives, securitization, and other tailor-made products, The Treasury area may act as brokers to transactions and also manages the Bank’s investment portfolio. Corporate Activities (“Other”) This segment mainly includes the results of our Financial Management Division, which develops global management functions, including managing inflation rate risk, foreign currency gaps, interest rate risk and liquidity risk. Liquidity risk is managed mainly through wholesale deposits, debt issuances and the Bank’s available for sale portfolio. This segment also manages capital allocation by unit. These activities usually result in a negative contribution to income. In addition, this segment encompasses all the intra-segment income and all the activities not assigned to a given segment or product with customers. The segments’ accounting policies are those described in the summary of accounting policies, The Bank earns most of its income in the form of interest income, fee and commission income and income from financial operations. To evaluate a segment’s financial performance and make decisions regarding the resources to be assigned to segments, the Chief Operating Decision Maker (CODM) bases his assessment on the segment’s interest income, fee and commission income, and expenses. Below are the tables showing the Bank’s results by reporting segment for the years ended December 31, 2020, 2019 and 2018 in addition to the corresponding balances of loans and accounts receivable from customers: For the year ended December 31, 2020 Loans and Net interest income Net fee and commission income Financial transactions, Expected Support expenses (3) Segment’s MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Retail Banking 24,279,248 1,049,543 213,431 28,577 (317,050) (596,464) 378,038 Middle-market 8,136,402 346,225 38,335 21,859 (109,999) (91,132) 205,287 CIB 1,635,217 114,229 23,180 82,303 (51,097) (72,715) 95,900 Other 289,026 83,851 (7,668) 17,058 (118) (8,235) 84,888 Total 34,339,893 1,593,848 267,278 149,797 (478,264) (768,546) 764,113 Other operating income 8,206 Other operating expenses and impairment (78,444) Income from investments in associates and other companies 1,388 Income tax expense (142,533) Result of continuing operations 552,730 Result of discontinued operations - Net income for the year 552,730 (1) Corresponds to loans and accounts receivable at amortized cost under IFRS 9, without deducting their allowances for loan losses. (2) Corresponds to the sum of the net income from financial operations and the foreign exchange profit or loss. (3) Corresponds to the sum of personnel salaries and expenses, administrative expenses, depreciation and amortization. For the year ended December 31, 2019 Loans and accounts receivable at amortized cost (1) Net interest income Net fee and commission income Financial transactions, net (2) Expected Support expenses (3) Segment’s MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Retail Banking 22,926,377 960,361 230,627 28,426 (279,969) (575,511) 363,934 Middle-market 8,093,496 298,587 38,712 13,535 (38,746) (97,054) 215,034 CIB 1,603,633 98,154 29,103 94,761 223 (65,343) 156,898 Other 48,009 59,862 (11,356) 64,970 (4,819) (11,953) 96,704 Total 32,671,515 1,416,964 287,086 201,692 (323,311) (749,861) 832,570 Other operating income 13,001 Other operating expenses and impairment (52,029) Income from investments in associates and other companies 1,146 Income tax expense (175,074) Result of continuing operations 619,614 Result of discontinued operations 1,699 Net income for the year 621,313 (1) Corresponds to loans and accounts receivable at amortized cost under IFRS 9, without deducting their allowances for loan losses. (2) Corresponds to the sum of the net income from financial operations and the foreign exchange profit or loss. (3) Corresponds to the sum of personnel salaries and expenses, administrative expenses, depreciation and amortization. For the year ended December 31, 2018 Loans and accounts receivable at amortized cost (1) Net interest income Net fee and commission income Financial transactions, net (2) Expected Support expenses (3) Segment’s MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Retail Banking 20,786,637 949,764 220,532 19,694 (287,739) (553,157) 349,094 Middle-market 7,690,380 272,912 36,746 16,848 (26,314) (92,377) 207,815 CIB 1,613,088 96,722 35,064 57,340 2,339 (64,913) 126,552 Other 123,310 94,970 (1,457) 11,200 (5,694) (11,486) 87,533 Total 30,213,415 1,414,368 290,885 105,082 (317,408) (721,933) 770,994 Other operating income 23,129 Other operating expenses and impairment (32,381) Income from investments in associates and other companies 1,325 Income tax expense (167,144) Result of continuing operations 595,923 Result of discontinued operations 3,770 Net income for the year 599,693 (1) Corresponds to loans and accounts receivable at amortized cost under IFRS 9, without deducting their allowances for loan losses. (2) Corresponds to the sum of the net income from financial operations and the foreign exchange profit or loss. (3) Corresponds to the sum of personnel salaries and expenses, administrative expenses, depreciation and amortization.

Cash and Cash Equivalents

Cash and Cash Equivalents	12 Months Ended
	Dec. 31, 2020
Cash and cash equivalents [abstract]
CASH AND CASH EQUIVALENTS	CASH AND CASH EQUIVALENTS a) The detail of the balances included under cash and cash equivalents is as follows: As of December 31, 2020 2019 Cash and deposits in banks Cash 665,397 861,178 Deposits at the Central Bank of Chile 1,313,394 1,731,079 Deposits in local banks 1,571 948 Deposits in banks abroad 822,926 961,315 Subtotals – Cash and deposits in banks 2,803,288 3,554,520 Net cash items in process of collection 91,332 156,814 Cash and cash equivalents 2,894,620 3,711,334 The balance of funds held in cash and at the Central Bank of Chile reflects the monthly average that the Bank must maintain in accordance with the regulations governing minimum reserves although the balance can be withdrawn on demand. b) Cash in process of collection and in process of being cleared: Cash items in process of collection and in process of being cleared represent domestic transactions which have not been processed through the central domestic clearinghouse or international transactions which may be delayed in settlement due to timing differences. These transactions were as follows: As of December 31, 2020 2019 Assets Documents held by other banks (documents to be cleared) 137,396 217,394 Funds receivable 315,567 137,668 Subtotal 452,963 355,062 Liabilities Funds payable 361,631 198,248 Subtotal 361,631 198,248 Cash in process of collection, net 91,332 156,814

Financial Assets Held for Tradi

Financial Assets Held for Trading	12 Months Ended
	Dec. 31, 2020
Financial Assets Held For Trading Trading Investments Explanatory [Abstract]
FINANCIAL ASSETS HELD FOR TRADING	FINANCIAL ASSETS HELD FOR TRADING The detail of instruments deemed as financial trading investments is as follows: As of December 31, 2020 2019 MCh$ MCh$ Chilean Central Bank and Government securities Chilean Central Bank Bonds 419 1,952 Chilean Central Bank Notes - - Other Chilean Central Bank and Government securities 131,827 268,252 Subtotal 132,246 270,204 Other Chilean securities Time deposits in Chilean financial institutions - - Mortgage finance bonds of Chilean financial institutions - - Chilean financial institution bonds - - Chilean corporate bonds 1,472 - Other Chilean securities - - Subtotal 1,472 - Foreign financial securities Foreign Central Banks and Government securities - - Other foreign financial instruments - - Subtotal - Investments in mutual funds Funds managed by related entities - - Funds managed by others - - Subtotal - - Total 133,718 270,204 As of December 31, 2020 and 2019, there were no trading investments sold under contracts to resell to clients or financial institutions.

Investments under Resale Agreem

Investments under Resale Agreements and Obligations under Repurchase Agreements	12 Months Ended
	Dec. 31, 2020
Disclosure of repurchase and reverse repurchase agreements [text block] [Abstract]
INVESTMENTS UNDER RESALE AGREEMENTS AND OBLIGATIONS UNDER REPURCHASE AGREEMENTS	INVESTMENTS UNDER RESALE AGREEMENTS AND OBLIGATIONS UNDER REPURCHASE AGREEMENTS a) As of December 31, 2020 and 2019, the Bank does not have investment under resale agreements. b) Obligations arising from repurchase agreements The Bank raises funds by selling financial instruments and committing itself to buy them back at future dates, plus interest at a predetermined rate. As of December 31, 2020 and 2019, obligations related to instruments sold under repurchase agreements are as follows: As of December 31, 2020 2019 From 1 day More than 3 More than Total From 1 day More than 3 More Total MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Securities from Chilean Government and the Chilean Central Bank: Chilean Central Bank Bonds - - - - - - - - Chilean Central Bank Notes 461.961 - - 461.961 - - - - Other securities from the Government and the Chilean Central Bank 507.448 - - 507.448 379,891 33 - 379,924 Subtotal 969.409 - - 969.409 379,891 33 - 379,924 Instruments from other domestic institutions: Time deposits in Chilean financial institutions 399 - - 399 127 4 - 131 Subtotal 399 - - 399 127 4 - 131 Instruments from other foreign institutions: Securities from Government or foreign Central Banks - - - - - - - - Subtotal - - - - Total 969,808 - - 969,808 380,018 37 - 380,055 c) Below is the detail by portfolio of collateral associated with repurchase agreements as of December 31, 2020 and 2019, valued at fair value: As of December 31, 2020 2019 Debt Financial Total Debt Financial Total MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Chilean Central Bank and Government securities: Chilean Central Bank Bonds - - - - - - Chilean Central Bank Notes 461,965 - 461,965 - - - Other securities from the Government and the Chilean Central Bank 507,543 - 507,543 379,924 - 379,924 Subtotal 969,508 - 969,508 379,924 - 379,924 Other Chilean securities: Time deposits in Chilean financial institutions 399 - 399 131 - 131 Subtotal 399 - 399 131 - 131 Instruments from other foreign institutions: Securities from Government or foreign Central Banks - - - - - - Subtotal - - - - - - Total 969,907 969,907 380,055 - 380,055

Derivative Financial Instrument

Derivative Financial Instruments and Hedge Accounting	12 Months Ended
	Dec. 31, 2020
Disclosure of derivative financial instruments [text block] [Abstract]
DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGE ACCOUNTING	DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGE ACCOUNTING a) As of December 31, 2020 and 2019 the Bank holds the following portfolio of derivative instruments: As of December 31, 2020 Notional amount Fair value Up to 3 More than 3 More than Total Assets Liabilities MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Fair value hedge derivatives Interest rate swaps 50,000 410,687 5,064,113 5,524,800 33,816 83,666 Cross currency swaps 317,400 601,987 5,634,700 6,554,087 294,562 178,529 Subtotal 367,400 1,012,674 10,698,813 12,078,887 328,378 262,195 Cash flow hedge derivatives Currency forwards 2,121,326 503,280 601,582 3,226,188 2,985 3,556 Cross currency swaps 424,358 498,373 9,777,491 10,700,222 35,902 183,386 Subtotal 2,545,684 1,001,653 10,379,073 13,926,410 38,887 186,942 Trading derivatives Currency forwards 22,729,787 12,175,074 8,215,576 43,120,437 1,085,327 1,158,904 Interest rate swaps 14,006,503 22,118,742 97,803,009 133,928,254 3,651,651 3,588,912 Cross currency swaps 6,719,065 15,138,056 138,352,345 160,209,466 3,921,440 3,819,446 Call currency options 129,339 31,641 57,581 218,561 1,527 909 Put currency options 112,145 16,173 58,276 186,594 4,875 1,352 Subtotal 43,696,839 49,479,686 244,486,787 337,663,312 8,664,820 8,569,523 Total 46,609,923 51,494,013 265,564,673 363,668,609 9,032,085 9,018,660 As of December 31, 2019 Notional amount Fair value Up to 3 More than 3 More than Total Assets Liabilities MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Fair value hedge derivatives Interest rate swaps 381,638 317,610 1,847,138 2,546,386 39,460 34,264 Cross currency swaps 407,008 863,984 13,357,058 14,628,050 226,870 295,281 Subtotal 788,646 1,181,594 15,204,196 17,174,436 266,330 329,545 Cash flow hedge derivatives Currency forwards 99,105 1,018,656 768,256 1,886,017 4,131 3,505 Cross currency swaps 2,266,907 1,938,222 10,848,233 15,053,362 106,413 43,183 Subtotal 2,366,012 2,956,878 11,616,489 16,939,379 110,544 46,688 Trading derivatives Currency forwards 28,472,586 18,508,702 7,679,464 54,660,752 1,023,683 1,137,496 Interest rate swaps 16,678,487 40,892,909 89,109,046 146,680,442 2,465,235 2,270,686 Cross currency swaps 7,726,724 20,457,463 113,206,678 141,390,865 4,277,450 3,605,516 Call currency options 17,971 47,012 81,804 146,787 5,176 240 Put currency options 16,409 41,872 80,655 138,936 190 483 Subtotal 52,912,177 79,947,958 210,157,647 343,017,782 7,771,734 7,014,421 Total 56,066,835 84,086,430 236,978,332 377,131,597 8,148,608 7,390,654 b) Micro-hedge accounting Fair value micro-hedge The Bank uses cross-currency swaps and interest rate swaps to hedge its exposure to changes in fair value of hedged items attributable to interest rates. Those hedging instruments change the effective cost of long-term issuances from a fixed interest rate to a variable interest rate. Below is a detail of the hedged elements and hedge instruments under fair value hedges as of December 31, 2020 and 2019, classified by term to maturity: As of December 31, 2020 Within 1 year Between 1 and Between 3 and Over 6 years Total MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Debt instruments at FVOCI Chilean sovereign bonds 10,687 10,687 138,044 249,440 408,858 Mortgage financing bonds - 918 - - 918 US Treasury bonds - - 178,118 - 178,118 Time deposits and other time liabilities Time deposits 58,238 58,217 - - 116,455 Issued debt instruments Senior bonds 88,023 801,349 2,112,831 1,220,521 4,222,724 Subordinated bonds - - 249,363 142,494 391,857 Interbank borrowing Chilean Central Bank loans - - 3,865,000 - 3,865,000 Total 156,948 871,171 6,543,356 1,612,455 9,183,930 Hedging instrument Cross currency swaps 96,261 835,484 2,056,864 1,220,521 4,209,130 Interest rate swaps 60,687 35,687 4,486,492 391,934 4,974,800 Total 156,948 871,171 6,543,356 1,612,455 9,183,930 As of December 31, 2019 Within 1 year Between 1 and 3 years Between 3 and 6 years Over 6 years Total MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Debt instruments at FVOCI Chilean sovereign bonds - - 5,605 394,690 400,295 Mortgage financing bonds - 2,728 - - 2,728 US Treasury bonds - - 149,474 37,369 186,843 Chilean Treasury bonds - 289,369 - - 289,369 Chilean Central Bank bonds - 254,685 - - 254,685 Time deposits and other time liabilities Time deposits 685,259 281,921 225,515 - 1,192,695 Issued debt instruments Senior bonds 651,681 1,133,698 2,253,892 3,324,100 7,363,371 Total 1,336,940 1,962,401 2,634,486 3,756,158 9,689,985 Hedging instrument Cross currency swaps 637,692 1,602,401 2,229,407 3,324,099 7,793,599 Interest rate swaps 699,248 360,000 405,079 432,059 1,896,386 Total 1,336,940 1,962,401 2,634,486 3,756,158 9,689,985 Cash flow micro-hedges The Bank uses cross currency swaps to hedge the risk from variability of cash flows attributable to changes in the interest rates of bonds and interbank loans at a variable interest rate. The inflation risk that arises in some items is covered by both forwards as well as cross currency swaps. Below is the notional amount of the hedged items as of December 31, 2020 and 2019, and the period when the cash flows will be generated: As of December 31, 2020 Within 1 Between 1 and Between 3 and Over 6 Total MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Loans and accounts receivable at amortized cost Mortgage loans 1,926,918 2,520,951 2,761,742 2,084,180 9,293,791 Debt instruments at FVOCI Chilean sovereign bonds - - 42,532 - 42,532 Chilean Treasury bonds - 175,875 891,791 196,428 1,264,094 Issued debt instruments Senior bonds (variable rate) 167,430 - - - 167,430 Senior bonds (fixed rate) 1,125,253 610,385 643,700 415,865 2,795,203 Interbank borrowings Interbank loans 327,736 35,624 - - 363,360 Total 3,547,337 3,342,835 4,339,765 2,696,473 13,926,410 Hedging instrument Cross currency swaps 922,731 2,741,253 4,339,765 2,696,473 10,700,222 Currency forwards 2,624,606 601,582 - - 3,226,188 Total 3,547,337 3,342,835 4,339,765 2,696,473 13,926,410 As of December 31, 2019 Within 1 Between 1 and Between 3 and Over 6 Total MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Loans and accounts receivable at amortized cost Mortgage loans 3,334,734 1,505,595 1,995,156 3,136,962 9,972,447 Commercial loans - - - - - Debt instruments at FVOCI Chilean sovereign bonds - - - - - Chilean Central Bank bonds - - 82,727 - 82,727 Time deposits - - 267,286 225,981 493,267 Time deposits and other time liabilities Time deposits - - - - - Issued debt instruments Senior bonds (variable rate) 358,118 341,283 - - 699,401 Senior bonds (fixed rate) 803,596 1,696,595 1,152,461 1,069,511 4,722,163 Interbank borrowings Interbank loans 826,442 142,932 - - 969,374 Total 5,322,890 3,686,405 3,497,630 4,432,454 16,939,379 Hedging instrument Cross currency swaps 4,205,129 2,918,149 3,497,630 4,432,454 15,053,362 Currency forwards 1,117,761 768,256 - - 1,886,017 Total 5,322,890 3,686,405 3,497,630 4,432,454 16,939,379 Below is an estimate of the periods in which cash flows are expected to be produced: b.1 Forecasted cash flows for interest rate risk: As of December 31, 2020 Within 1 Between 1 and 3 Between 3 and 6 Over 6 years Total MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Inflows 18,219 2,284 2,512 - 23,015 Outflows (90,303) (123,604) (104,198) (83,397) (401,502) Net flows (72,084) (121,320) (101,686) (83,397) (378,487) Hedging instrument Inflows 90,303 123,604 104,198 83,397 401,502 Outflows (*) (18,219) (2,284) (2,512) - (23,015) Net flows 72,084 121,320 101,686 83,397 378,487 (*) Only includes cash flow forecast portion of the hedge instruments used to cover interest rate risk. As of December 31, 2019 Within 1 year Between 1 and Between 3 and 6 Over 6 years Total MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Inflows 25,328 10,220 217 - 35,765 Outflows (356,683) (245,480) (154,689) (163,151) (920,003) Net flows (331,355) (235,260) (154,472) (163,151) (884,238) Hedging instrument Inflows 356,683 245,480 154,689 163,151 920,003 Outflows (*) (25,328) (10,220) (217) - (35,765) Net flows 331,355 235,260 154,472 163,151 884,238 (*) Only includes cash flow forecast portion of the hedge instruments used to cover interest rate risk. b.2 Forecasted cash flows for inflation risk: As of December 31, 2020 Within 1 year Between 1 and Between 3 and Over 6 years Total MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Inflows 114,734 257,698 457,046 406,499 1,235,977 Outflows (32,238) (19,702) (55,388) (26,993) (134,321) Net flows 82,496 237,996 401,658 379,506 1,101,656 Hedging instrument Inflows 32,238 19,702 55,388 26,993 134,321 Outflows (114,734) (257,698) (457,046) (406,499) (1,235,977) Net flows (82,496) (237,996) (401,658) (379,506) (1,101,656) As of December 31, 2019 Within Between 1 and Between 3 and Over 6 Total MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Inflows 74,574 109,486 216,972 422,362 823,394 Outflows (19,466) (50,151) (33,140) (52,880) (155,637) Net flows 55,108 59,335 183,832 369,482 667,757 Hedging instrument Inflows 19,466 50,151 33,140 52,880 155,637 Outflows (74,574) (109,486) (216,972) (422,362) (823,394) Net flows (55,108) (59,335) (183,832) (369,482) (667,757) b.3 Forecasted cash flows for exchange rate risk: As of December 31, 2020 and 2019 the Bank has no forecasted cash flows for exchange rate risk. c) The accumulated effect of the mark to market adjustment of cash flow hedges generated by hedge instruments used in hedged cash flow was recorded in the Consolidated Statements of Changes in Equity, within Other comprehensive income, as of December 31, 2020 and 2019, is as follows: As of December 31, Hedged item 2020 2019 MCh$ MCh$ Interbank loans (962) (1,872) Issued debt instruments (6,990) (16,345) Debt instruments at FVOCI (25,833) (2,905) Loans and accounts receivable at amortized cost (102,980) (19,313) Total (136,765) (40,435) Since the inflows and outflows for both the hedged element and the hedging instrument mirror each other, the hedges are nearly 100% effective, which means that fluctuations of fair value attributable to risk components are almost completely offset. During the current year, the Bank did not enter into any cash flow hedges relating to forecasted transactions. d) Below is a presentation of income generated by cash flow hedges amount that were reclassified from other comprehensive income to income for the year: For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Bond hedging derivatives (3,149) (120) - Interbank loans hedging derivatives 1 (955) (683) Cash flow hedge net gain (loss) (3,148) (1,075) (683) See Note 23 - Equity, letter e) e) Net investment hedges in foreign operations As of December 31, 2020 and 2019, the Bank does not have any foreign net investment hedges nor hedge accounting. f) Fair value macro-hedges Notional amount As of December 31, 2020 Within 1 Between Between 3 Over 6 Total MCh$ MCh$ MCh$ MCh$ MCh$ Hedge item Loans and account receivable at amortized cost Mortgage loans 823,126 786,352 - 735,479 2,344,957 Commercial loans 400,000 150,000 - - 550,000 Total 1,223,126 936,352 - 735,479 2,894,957 Hedging instrument Cross currency swaps 823,126 786,352 - 735,479 2,344,957 Interest rate swaps 400,000 150,000 - - 550,000 Total 1,223,126 936,352 - 735,479 2,894,957 Notional amount As of December 31, 2019 Within 1 Between Between 3 Over 6 Total MCh$ MCh$ MCh$ MCh$ MCh$ Hedge item Loans and account receivable at amortized cost Mortgage loans 633,300 1,189,037 1,545,239 3,466,875 6,834,451 Commercial loans - 600,000 50,000 - 650,000 Total 633,300 1,789,037 1,595,239 3,466,875 7,484,451 Hedging instrument Cross currency swaps 633,300 1,189,037 1,545,239 3,466,875 6,834,451 Interest rate swaps - 600,000 50,000 - 650,000 Total 633,300 1,789,037 1,595,239 3,466,875 7,484,451 As of December 31, 2020 and 2019, Other Assets include MCh$327,938 and MCh$210,867 respectively, related to fair value measurement of net assets or liabilities subject to macrohedges. See Note 15.

Loans and Accounts Receivable a

Loans and Accounts Receivable at Amortized Cost	12 Months Ended
	Dec. 31, 2020
Disclosure of loans and advances to customers [text block] [Abstract]
LOANS AND ACCOUNTS RECEIVABLE AT AMORTIZED COST	LOANS AND ACCOUNTS RECEIVABLE AT AMORTIZED COST As of December 31, 2020 the composition of the loan portfolio is as follows: Assets before allowances ECL allowance (*) As of December 31, 2020 Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total Net MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Commercial loans Interbank loans 18,930 - - 18,930 1 - - 1 18,929 Commercial loans 11,453,377 1,285,770 751,471 13,490,618 60,987 87,295 349,864 498,146 12,992,472 Foreign trade loans 979,014 221,074 39,183 1,239,271 5,323 2,786 33,152 41,261 1,198,010 Checking accounts debtors 92,789 21,315 11,506 125,610 1,253 1,524 8,825 11,602 114,008 Factoring transactions 486,587 7,207 3,885 497,679 1,397 387 2,345 4,129 493,550 Student loans 49,768 4,905 8,707 63,380 1,551 714 6,533 8,798 54,582 Leasing transactions 1.015.298 267.062 72.797 1.355.157 7,377 14,934 37,376 59,687 1,295,470 Other loans and account receivable 163.035 10.973 22.536 196.544 2,643 2,127 16,678 21,448 175,096 Subtotal 14.258.798 1.818.306 910.085 16.987.189 80,532 109,767 454,773 645,072 16,342,117 Mortgage loans Loans with mortgage finance bonds 6,859 546 404 7,809 16 11 57 84 7,725 Endorsable mortgage mutual loans 86,786 2,463 3,711 92,960 221 63 474 758 92,202 Other mortgage mutual loans 11,424,718 389,363 496,975 12,311,056 24,828 8,367 78,485 111,680 12,199,376 Subtotal 11,518,363 392,372 501,090 12,411,825 25,065 8,441 79,016 112,522 12,299,303 Consumer loans Installment consumer loans 3,221,617 211,348 255,627 3,688,592 76,140 26,737 152,639 255,516 3,433,076 Credit card balances 1,097,680 20,380 7,848 1,125,908 10,781 4,141 5,037 19,959 1,105,949 Leasing transactions 2,956 139 26 3,121 29 22 16 67 3,054 Other consumer loans 116,910 4,728 1,620 123,258 1,875 832 950 3,657 119,601 Subtotal 4,439,163 236,595 265,121 4,940,879 88,825 31,732 158,642 279,199 4,661,680 Total 30,216,324 2,447,273 1,676,296 34,339,893 194,422 149,940 692,431 1,036,793 33,303,100 (*) Include overlays for an amount of MCh$59,000. See Note 37. As of December 31, 2019 the composition of the loan portfolio is as follows: Assets before allowances ECL allowance As of December 31, 2019 Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total Net MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Commercial loans Interbank loans 14,852 - - 14,852 1 - - 1 14,851 Commercial loans (*) 10,179,002 870,028 659,157 11,708,187 41,296 41,734 301,094 384,124 11,324,063 Foreign trade loans 1,519,757 155,324 38,552 1,713,633 4,113 705 23,569 28,387 1,685,246 Checking accounts debtors 166,771 16,108 14,014 196,893 1,492 764 9,644 11,900 184,993 Factoring transactions 478,465 7,946 2,989 489,400 1,158 234 1,904 3,296 486,104 Student loans 57,206 5,942 8,125 71,273 1,774 1,950 5,595 9,319 61,954 Leasing transactions 1,184,765 178,556 61,541 1,424,862 5,415 8,270 30,960 44,645 1,380,217 Other loans and account receivable 201,805 11,163 30,257 243,225 2,178 2,287 20,432 24,897 218,328 Subtotal 13,802,623 1,245,067 814,635 15,862,325 57,427 55,944 393,198 506,569 15,355,756 Mortgage loans Loans with mortgage finance bonds 10,774 744 780 12,298 13 21 103 137 12,161 Endorsable mortgage mutual loans 92,792 2,819 4,541 100,152 72 103 641 816 99,336 Other mortgage mutual loans 10,172,400 454,385 523,760 11,150,545 8,361 14,385 77,360 100,106 11,050,439 Subtotal 10,275,966 457,948 529,081 11,262,995 8,446 14,509 78,104 101,059 11,161,936 Consumer loans Installment consumer loans 3,378,489 270,347 268,700 3,917,536 51,289 45,102 158,670 255,061 3,662,475 Credit card balances 1,341,734 17,668 18,308 1,377,710 12,507 4,894 9,936 27,337 1,350,373 Leasing transactions 3,569 303 80 3,952 56 30 36 122 3,830 Other consumer loans 239,255 4,400 3,342 246,997 3,544 782 1,621 5,947 241,050 Subtotal 4,963,047 292,718 290,430 5,546,195 67,396 50,808 170,263 288,467 5,257,728 Total 29,041,636 1,995,733 1,634,146 32,671,515 133,269 121,261 641,565 896,095 31,775,420 a. Commercial loans An analysis of changes in the gross carrying amount and the corresponding ECL allowance as of December 31, 2020, is as follows: Stage1 Stage2 Stage3 TOTAL Individual Collective Individual Collective Individual Collective MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Gross carrying amount at 10,208,264 3,594,359 1,004,967 240,100 401,007 413,628 15,862,325 Transfers: Transfers from stage 1 to stage 2 (1,355,492) (277,926) 1,355,492 277,926 - - - Transfers from stage 1 to stage 3 (2,492) (52,304) - - 2,492 52,304 - Transfers from stage 2 to stage 3 - - (198,124) (163,049) 198,124 163,049 - Transfers from stage 2 to stage 1 239,349 162,768 (239,349) (162,768) - - - Transfers from stage 3 to stage 2 - - 4,022 117,446 (4,022) (117,446) - Transfers from stage 3 to stage 1 - 138 - - - (138) - Net changes of financial assets 676,413 1,056,882 (337,291) (80,505) (537) (29,882) 1,285,080 Write-off - - - - (66,989) (101,548) (168,537) FX and other adjustments (1,243) 10,082 (2) (559) (9) 52 8,321 At December 31, 2020 9,764,799 4,493,999 1,589,715 228,591 530,066 380,019 16,987,189 Stage 1 Stage 2 Stage 3 TOTAL Individual Collective Individual Collective Individual Collective MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ ECL allowance at January 1, 2020 21,539 35,888 30,389 25,555 196,165 197,033 506,569 Transfers Transfers to stage 2 (23,652) (16,137) 50,253 48,464 - - 58,928 Transfers to stage 3 (9) (3,007) - - 1,089 22,152 20,225 Transfers to stage 3 - - (25,214) (29,540) 73,885 55,645 74,776 Transfers to stage 1 2,919 4,921 (9,322) (20,605) - - (22,087) Transfers to stage 2 - - 943 4,424 (1,560) (22,995) (19,188) Transfers to stage 1 - 5 - - - (45) (40) Net changes of the exposure and modifications in credit risk 39,971 19,264 18,462 15,122 58,915 41,860 193,594 Write-off - - - - (66,989) (100,393) (167,382) FX and other adjustments (1,179) 9 (59) 895 - 11 (323) At December 31, 2020 39,589 40,943 65,452 44,315 261,505 193,268 645,072 An analysis of changes in the gross carrying amount and the corresponding ECL allowance as of December 31, 2019, is as follows: Stage1 Stage2 Stage3 TOTAL Individual Collective Individual Collective Individual Collective MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Gross carrying amount at January 1, 2019(*) 9,695,837 3,644,407 867,783 235,239 386,929 387,265 15,217,460 Transfers: Transfers from stage 1 to stage 2 (518,990) (347,678) 518,990 347,678 - - - Transfers from stage 1 to stage 3 - (41,696) - - - 41,696 - Transfers from stage 2 to stage 3 - - (132,136) (230,125) 132,136 230,125 - Transfers from stage 2 to stage 1 158,935 159,009 (158,935) (159,009) - - - Transfers from stage 3 to stage 2 - - 11,229 120,293 (11,229) (120,293) - Transfers from stage 3 to stage 1 - 1,134 - - - (1,134) - Net changes of financial assets 542,311 415,524 (119,884) (68,960) (24,788) (31,945) 712,258 Write-off - - - - (83,845) (94,004) (177,849) FX and other adjustments 330,171 (236,341) 17,920 (5,016) 1,804 1,918 110,456 At December 31, 2019 10,208,264 3,594,359 1,004,967 240,100 401,007 413,628 15,862,325 Stage 1 Stage 2 Stage 3 TOTAL Individual Collective Individual Collective Individual Collective MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ ECL allowance at January 1, 2019(*) 30,189 44,104 31,066 24,945 198,115 179,771 508,190 Transfers Transfers to stage 2 (7,786) (20,058) 17,237 68,705 - - 58,098 Transfers to stage 3 - (2,666) - - - 16,087 13,421 Transfers to stage 3 - - (8,567) (42,601) 44,203 71,200 64,235 Transfers to stage 1 1,576 4,838 (7,525) (22,278) - - (23,389) Transfers to stage 2 - - 685 9,667 (3,867) (27,482) (20,997) Transfers to stage 1 - 88 - - - (242) (154) Net changes of the exposure and modifications in credit risk (6,948) 14,199 (3,151) (12,533) 41,365 54,962 87,894 Write-off - - - - (83,844) (94,014) (177,858) FX and other adjustments 4,508 (4,617) 644 (350) 193 (3,249) (2,871) At December 31, 2019 21,539 35,888 30,389 25,555 196,165 197,033 506,569 (*) Include loans and ECL balances of the acquired Santander Consumer Chile S.A. b. Mortgage loans An analysis of changes in the gross carrying amount and the corresponding ECL allowance as of December 31, 2020, is as follows: Stage1 Stage2 Stage3 TOTAL Collective Collective Collective MCh$ MCh$ MCh$ MCh$ Gross carrying amount at January 1, 2020 10,275,966 457,948 529,081 11,262,995 Transfers: Transfers from stage 1 to stage 2 (248,167) 248,167 - - Transfers from stage 1 to stage 3 (53,621) - 53,621 - Transfers from stage 2 to stage 3 - (215,547) 215,547 - Transfers from stage 2 to stage 1 321,954 (321,954) - - Transfers from stage 3 to stage 2 - 248,635 (248,635) - Transfers from stage 3 to stage 1 463 - (463) - Net changes of financial assets 1,221,898 (25,440) (22,147) 1,174,311 Write-off - - (25,831) (25,831) FX and other adjustments (130) 563 (83) 350 At December 31, 2020 11,518,363 392,372 501,090 12,411,825 Stage 1 Stage 2 Stage 3 TOTAL Collective Collective Collective MCh$ MCh$ MCh$ MCh$ ECL allowance at January 1, 2020 8,446 14,509 78,104 101,059 Transfers Transfers from stage 1 to stage 2 (5,250) 12,502 - 7,252 Transfers from stage 1 to stage 3 (472) - 4,548 4,076 Transfers from stage 2 to stage 3 - (8,923) 20,034 11,111 Transfers from stage 2 to stage 1 3,187 (13,912) - (10,725) Transfers from stage 3 to stage 2 - 7,033 (28,146) (21,113) Transfers from stage 3 to stage 1 2 - (37) (35) Net changes of the exposure and modifications in credit risk 19,162 (2,791) 30,352 46,723 Write-off - - (25,831) (25,831) FX and other adjustments (10) 23 (8) 5 At December 31, 2020 25,065 8,441 79,016 112,522 An analysis of changes in the gross carrying amount and the corresponding ECL allowance as of December 31, 2019, is as follows: Stage1 Stage2 Stage3 TOTAL Collective Collective Collective MCh$ MCh$ MCh$ MCh$ Gross carrying amount at January 1, 2019 9,258,962 447,496 444,523 10,150,981 Transfers: Transfers from stage 1 to stage 2 (481,646) 481,646 - - Transfers from stage 1 to stage 3 (60,329) - 60,329 - Transfers from stage 2 to stage 3 - (333,706) 333,706 - Transfers from stage 2 to stage 1 361,293 (361,293) - - Transfers from stage 3 to stage 2 - 250,896 (250,896) - Transfers from stage 3 to stage 1 2,338 - (2,338) - Net changes of financial assets 1,131,941 (35,200) (24,539) 1,072,202 Write-off - - (34,184) (34,184) FX and other adjustments 63,407 8,109 2,480 73,996 At December 31, 2019 10,275,966 457,948 529,081 11,262,995 Stage 1 Stage 2 Stage 3 TOTAL Collective Collective Collective MCh$ MCh$ MCh$ MCh$ ECL allowance at January 1, 2019 9,006 15,102 67,162 91,270 Transfers Transfers from stage 1 to stage 2 (3,318) 20,509 - 17,191 Transfers from stage 1 to stage 3 (311) - 5,994 5,683 Transfers from stage 2 to stage 3 - (12,598) 31,654 19,056 Transfers from stage 2 to stage 1 1,374 (13,849) - (12,475) Transfers from stage 3 to stage 2 - 8,341 (29,303) (20,962) Transfers from stage 3 to stage 1 6 - (193) (187) Net changes of the exposure and modifications in credit risk 1,655 (3,054) 32,561 31,162 Write-off - - (34,184) (34,184) FX and other adjustments 34 58 4,413 4,505 At December 31, 2019 8,446 14,509 78,104 101,059 c. Consumer loans An analysis of changes in the gross carrying amount and the corresponding ECL allowance as of December 31, 2020, is as follows: Stage1 Stage2 Stage3 TOTAL Collective Collective Collective MCh$ MCh$ MCh$ MCh$ Gross carrying amount at January 1, 2020 4,963,047 292,718 290,430 5,546,195 Transfers: Transfers from stage 1 to stage 2 (410,942) 410,942 - - Transfers from stage 1 to stage 3 (16,962) - 16,962 - Transfers from stage 2 to stage 3 - (223,169) 223,169 - Transfers from stage 2 to stage 1 238,800 (238,800) - - Transfers from stage 3 to stage 2 - 57,574 (57,574) - Transfers from stage 3 to stage 1 2,225 - (2,225) - Net changes of financial assets (337,006) (62,658) 13,765 (385,899) Write-off - - (219,402) (219,402) FX and other adjustments 1 (12) (4) (15) At December 31, 2020 4,439,163 236,595 265,121 4,940,879 Stage 1 Stage 2 Stage 3 TOTAL Collective Collective Collective MCh$ MCh$ MCh$ MCh$ ECL allowance at January 1, 2020 67,396 50,808 170,263 288,467 Transfers: Transfers from stage 1 to stage 2 (36,422) 95,850 - 59,428 Transfers from stage 1 to stage 3 (1,484) - 9,061 7,577 Transfers from stage 2 to stage 3 - (75,229) 108,792 33,563 Transfers from stage 2 to stage 1 13,589 (41,928) - (28,339) Transfers from stage 3 to stage 2 - 10,162 (28,649) (18,487) Transfers from stage 3 to stage 1 254 - (865) (611) Net changes of the exposure and 45,492 (7,926) 104,328 141,894 Write-off - - (204,286) (204,286) FX and other adjustments - (5) (2) (7) At December 31, 2019 88,825 31,732 158,642 279,199 An analysis of changes in the gross carrying amount and the corresponding ECL allowance as of December 31, 2019, is as follows: Stage1 Stage2 Stage3 TOTAL Collective Collective Collective MCh$ MCh$ MCh$ MCh$ Gross carrying amount at January 1, 2019(*) 4,727,464 295,132 300,193 5,322,789 Transfers: Transfers from stage 1 to stage 2 (358,403) 358,403 - - Transfers from stage 1 to stage 3 (25,210) - 25,210 - Transfers from stage 2 to stage 3 - (248,494) 248,494 - Transfers from stage 2 to stage 1 130,611 (130,611) - - Transfers from stage 3 to stage 2 - 56,489 (56,489) - Transfers from stage 3 to stage 1 514 - (514) - Net changes of financial assets 430,777 (45,093) (3,605) 382,079 Write-off - - (223,919) (223,919) FX and other adjustments 57,294 6,892 1,060 65,246 At December 31, 2019 4,963,047 292,718 290,430 5,546,195 Stage 1 Stage 2 Stage 3 TOTAL Collective Collective Collective MCh$ MCh$ MCh$ MCh$ ECL allowance at January 1, 2019 (*) 75,495 60,467 165,052 301,014 Transfers Transfers to stage 2 (28,717) 109,916 - 81,199 Transfers to stage 3 (1,633) - 11,699 10,066 Transfers to stage 3 - (78,909) 111,334 32,425 Transfers to stage 1 7,941 (32,506) - (24,565) Transfers to stage 2 - 17,002 (31,914) (14,912) Transfers to stage 1 47 - (233) (186) Net changes of the exposure and modifications in the credit risk 15,641 (25,712) 135,298 125,227 Write-off - - (223,919) (223,919) FX and other adjustments (1,378) 550 2,946 2,118 At December 31, 2019 67,396 50,808 170,263 288,467 (*) Include loans and ECL balances of the acquired Santander Consumer Chile S.A. For 2020, there were no changes in forward-looking variables. However, on April 2020, the Bank completed a calibration of parameters, in accordance with internal policies, resulting in an increase of MCh$2,066 within the expected credit losses allowance. For 2019, there were no changes to the assumptions used within the model. However, the Bank completed an update of the 2018 forward-looking assessment, resulting in an increase of MCh$6,998 within the provision for loan losses.

Loans and Accounts Receivable_2

Loans and Accounts Receivable at Fair Value Through Other Comprehensive Income	12 Months Ended
	Dec. 31, 2020
Disclosure of Loans and Accounts Receivable at Fair Value Through Other Comprehensive Income [Abstract]
LOANS AND ACCOUNTS RECEIVABLE AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME	LOANS AND ACCOUNTS RECEIVABLE AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME The Bank has decided to classify a portfolio at fair value through other comprehensive income (FVOCI) related to loans and account receivable with its major customer, when they request a credit operation which exceeds single client exposure under the Bank’s credit risk policy. The risk committee approved the operation with the condition to sell a portion of the loan in the medium term, and meanwhile the Bank is looking for a buyer the portion is classified into this category. Additionally, the Bank includes operations which are expecting to sell or maintain, depending if market conditions are favorable, these loans are classified into this category according to management business model. This portfolio is initially measured at amortized cost and afterward is adjusted at fair value, recognizing the adjustment in other comprehensive income, while the Bank do not sell the loan. The portfolio is assessed for impairment loss under the new ECL model, same as loans at amortized cost. An analysis of changes in the gross carrying amount and the corresponding ECL allowance is, as of December 31, 2020 is as follows: Stage1 Stage2 Stage3 TOTAL Individual Individual Individual MCh$ MCh$ MCh$ MCh$ Gross carrying amount at January 1, 2020 66,166 - - 66,166 Transfers Transfers to stage 1 - - - - Transfers to stage 2 - - - - Transfers to stage 3 - - - - Net changes on financial assets 3,857 - - 3,857 Write-off - - - - FX and other adjustments 662 - - 662 At December 31, 2020 70,685 - - 70,685 Stage 1 Stage 2 Stage 3 TOTAL Individual Individual Individual MCh$ MCh$ MCh$ MCh$ ECL allowance at January 1, 2020 101 - - 101 Transfers Transfers to stage 1 - - - - Transfers to stage 2 - - - - Transfers to stage 3 - - - - Net changes of the exposure and modifications in the credit risk 1,252 - - 1,252 Write-off - - - - FX and other adjustments 1 - - 1 At December 31, 2020 1,354 1,354 An analysis of changes in the gross carrying amount and the corresponding ECL allowance is, as of December 31, 2019 is as follows: Stage1 Stage2 Stage3 TOTAL Individual Individual Individual MCh$ MCh$ MCh$ MCh$ Gross carrying amount at January 1, 2019 63,745 4,949 - 68,694 Transfers Transfers to stage 1 - - - - Transfers to stage 2 - - - - Transfers to stage 3 - - - - Net changes on financial assets 1,428 (4,914) - (3,486) Write-off - - - - FX and other adjustments 993 (35) - 958 At December 31, 2019 66,166 - - 66,166 Stage 1 Stage 2 Stage 3 TOTAL Individual Individual Individual MCh$ MCh$ MCh$ MCh$ ECL allowance at January 1, 2019 88 18 - 106 Transfers Transfers to stage 1 - - - - Transfers to stage 2 - - - - Transfers to stage 3 - - - - Net changes of the exposure and 65 (18) - 47 Write-off - - - - FX and other adjustments (52) - - (52) At December 31, 2019 101 - - 101

Debt Instruments at Fair Value

Debt Instruments at Fair Value Through Other Comprehensive Income	12 Months Ended
	Dec. 31, 2020
Disclosure of available-for-sale financial assets [text block] [Abstract]
DEBT INSTRUMENTS AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME	DEBT INSTRUMENTS AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME As of December 31, 2020 and 2019 detail of debt instruments is as follows: As of December 31, 2020 2019 MCh$ MCh$ Chilean central bank and government securities Chilean central bank bonds - 272,802 Chilean central bank notes 1,008,450 1,186,724 Other Chilean central bank and government securities (*) 5,344,910 1,908,031 Subtotal 6,353,360 3,367,557 of which sold under repurchase agreement 969,508 379,294 Other Chilean securities Time deposits in Chilean financial institutions 492 398 Mortgage finance bonds of Chilean financial institutions 14,022 16,748 Other instruments issued in the country 2,217 2,410 Subtotal 16,731 19,556 of which sold under repurchase agreement 399 131 Foreign financial securities Foreign Central Banks and Government securities 269,803 197,685 Other foreign financial securities 522,648 425,474 Subtotal 792,451 623,159 of which sold under repurchase agreement - - Total 7,162,542 4,010,272 (*) Includes Treasury bonds in Chilean pesos and UF. The Bank holds instruments, belonging to “Chilean central bank and government securities”, which guarantee derivatives transactions through Comder Contraparte Central S,A, in the local market as of December 31, 2020 and 2019 for an amount of Ch$158,600 and Ch$65,140, while “Foreign financial securities” guarantee derivatives transactions through London Clearing House (LCH) as of December 31, 2020 and 2019 Ch$67,685 and Ch$73,109. Additionally, the Bank maintains guarantees with Euroclear as of December 31, 2020 and 2019 Ch$258,183 and Ch$390,954 to comply with the initial margin required by European EMIR standard. As of December 31, 2020 debt instruments at FVOCI included a cumulative net unrealized income of MCh$102,855, recorded as “valuation adjustment” in OCI, of which MCh$101,696 is attributable to shareholders equity and MCh$1,159 to non-controlling interest. As of December 31, 2019 debt instruments at FVOCI included a cumulative net unrealized income of MCh$29,184, recorded as “valuation adjustment” in OCI, of which MCh$28,135 are attributable to shareholders equity and MCh$1,049 to non-controlling interest. An analysis of changes in the fair value and the corresponding ECL as of December 31, 2020 is as follows: Stage1 Stage2 Stage3 TOTAL Collective Collective Collective Gross carrying amount at January 1, 2020 4,010,272 - - 4,010,272 New assets purchased 14,708,776 - - 14,708,776 Transfers to stage 1 - - - - Transfers to stage 2 - - - - Transfers to stage 3 - - - - Assets derecognized or matured (excluding write-off) (11,440,253) - - (11,440,253) Changes due to modifications not derecognized 100,401 - - 100,401 Other adjustments (216,654) - - (216,654) At December 31, 2020 7,162,542 - - 7,162,542 Stage1 Stage2 Stage3 TOTAL Collective Collective Collective ECL at January 1, 2020 456 - - 456 New assets purchased 1,965 - - 1,965 Transfers to stage 1 - - - - Transfers to stage 2 - - - - Transfers to stage 3 - - - - Assets derecognized or matured (excluding write-off) (1,501) - - (1,501) Changes due to modifications not derecognized 219 - - 219 Write-off - - - - Other adjustments (1) - - (1) At December 31, 2020 1,138 - - 1,138 An analysis of changes in the fair value and the corresponding ECL as of December 31, 2019 is as follows: Stage1 Stage2 Stage3 TOTAL Collective Collective Collective Gross carrying amount at January 1, 2019 2,394,323 - - 2,394,323 New assets purchased 7,573,665 - - 7,573,665 Transfers to stage 1 - - - - Transfers to stage 2 - - - - Transfers to stage 3 - - - - Assets derecognized or matured (excluding write-off) (5,694,456) (5,694,456) Changes due to modifications not derecognized 394,648 - - 2,273,857 Write-off - - - - Other adjustments (657,908) - - (657,908) At December 31, 2019 4,010,272 - - 4,010,272 Stage1 Stage2 Stage3 TOTAL Collective Collective Collective ECL at January 1, 2019 258 - - 258 New assets purchased 816 - - 816 Transfers to stage 1 - - - - Transfers to stage 2 - - - - Transfers to stage 3 - - - - Assets derecognized or matured (excluding write-off) (614) - - (614) Changes due to modifications not derecognized 67 - - 67 Write-off - - - - Other adjustments (71) - - (71) At December 31, 2019 456 - - 456 Gross profits and losses realized on the sale of available for sale investments as of December 31, 2020, 2019 and 2018 is as follows: As of December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Sale of available for sale investments generating realized profits 3,696,791 5,781,636 3,505,266 Realized profits 82,925 63,828 8,802 Sale of available for sale investments generating realized losses 379,046 607,349 709,371 Realized losses 2,246 156 6,004 The Bank evaluated those instruments with unrealized losses as of December 31, 2020 and 2019 and concluded they were not impaired. This review consisted of evaluating the economic reasons for any declines, the credit ratings of the securities’ issuers, and the Bank’s intention and ability to hold the securities until the unrealized loss is recovered. Based on this analysis, the Bank believes that there were no significant or prolonged declines nor changes in credit risk which would cause impairment in its investment portfolio, since most of the decline in fair value of these instruments was caused by market conditions which the Bank considers to be temporary. All of the instruments that have unrealized losses as of December 31, 2020 and 2019, were not in a continuing unrealized loss position for more than one year. The following charts show debt instruments at fair value through other comprehensive income cumulative unrealized profit and loss, as of December 31, 2020: Less than 12 months More than 12 months Total Amortized cost Fair value Unrealized profit Unrealized loss Amortized cost Fair value Unrealized profit Unrealized loss Amortized cost Fair value Unrealized profit Unrealized loss MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Chilean central bank and government securities Chilean central bank Bonds - - - - - - - - - - - - Chilean central bank notes 1,008,450 1,008,450 - - - - - - 1,008,450 1,008,450 - - Other Chilean central bank and government securities 5,288,189 5,344,910 96,180 (36,739) - - - - 5,288,189 5,344,910 96,180 (36,739) Subtotal 6,296,639 6,353,360 96,180 (36,739) - - - - 6,296,639 6,353,360 96,180 (36,739) Other Chilean securities Time deposits in Chilean financial institutions 299 299 - - - - - - 299 299 - - Mortgage finance bonds of Chilean financial institutions 13,293 14,022 729 - - - - - 13,293 14,022 729 - Chilean financial institution bonds - - - - - - - - - - - - Chilean corporate bonds - - - - - - - - - - - - Other Chilean securities 305 2,410 2,105 - - - - - 305 2,410 2,105 - Subtotal 13,897 16,731 2,834 - - - - - 13,897 16,731 2,834 - Foreign financial securities Foreign central banks and government securities 269,477 269,803 20,267 (19,941) - - - - 269,477 269,803 20,267 (19,941) Other foreign financial securities 482,394 522,648 40,254 - - - - - 482,394 522,648 40,254 - Subtotal 751,871 792,451 60,521 (19,941) - - - - 751,871 792,451 60,521 (19,941) Total 7,062,407 7,162,542 159,535 (56,680) - - - - 7,062,407 7,162,542 159,535 (56,680) The following charts show debt instruments at fair value through other comprehensive income cumulative unrealized profit and loss, as of December 31, 2019: Less than 12 months More than 12 months Total Amortized cost Fair value Unrealized profit Unrealized loss Amortized cost Fair value Unrealized profit Unrealized loss Amortized cost Fair value Unrealized profit Unrealized loss MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Chilean central bank and government securities Chilean central bank Bonds 270,979 272,802 3,600 (1,777) - - - - 270,979 272,802 3,600 (1,777) Chilean central bank notes 1,186,487 1,186,724 237 - - - - - 1,186,487 1,186,724 237 - Other Chilean central bank and government securities 1,895,367 1,908,031 38,002 (25,338) - - - - 1,895,367 1,908,031 38,002 (25,338) Subtotal 3,352,833 3,367,557 41,839 (27,115) - - - - 3,352,833 3,367,557 41,839 (27,115) Other Chilean securities Time deposits in Chilean financial institutions 398 398 - - - - - - 398 398 - - Mortgage finance bonds of Chilean financial institutions 15,962 16,748 786 - - - - - 15,962 16,748 786 - Chilean financial institution bonds - - - - - - - - - - - - Chilean corporate bonds - - - - - - - - - - - - Other Chilean securities 407 2,410 2,003 - - - - - 407 2,410 2,003 - Subtotal 16,767 19,556 2,789 - - - - - 16,767 19,556 2,789 - Foreign financial securities Foreign central banks and government securities 198,020 197,685 11,110 (11,445) - - - - 198,020 197,685 11,110 (11,445) Other foreign financial securities 413,468 425,474 13,080 (1,074) - - - - 413,468 425,474 13,080 (1,074) Subtotal 611,488 623,159 24,190 (12,519) - - - - 611,488 623,159 24,190 (12,519) Total 3,981,088 4,010,272 68,818 (39,634) - - - - 3,981,088 4,010,272 68,818 (39,634)

Investments in Associates and o

Investments in Associates and other Companies	12 Months Ended
	Dec. 31, 2019
Disclosure of interests in other entities [text block] [Abstract]
INVESTMENTS IN ASSOCIATES AND OTHER COMPANIES	INVESTMENTS IN ASSOCIATES AND OTHER COMPANIES a) Investments in associates and other, are shown in the following table: Investment Ownership interest As of December 31, Carrying value As of December 31, Profit and loss As of December 31, 2020 % 2019 % 2018 % 2020 MCh$ 2019 MCh$ 2018 MCh$ 2020 MCh$ 2019 MCh$ 2018 MCh$ Redbanc S.A. (*) - - 33,43 - - 2,822 - - - Transbank S.A. (*) - - 25,00 - - 17,651 - - - Centro de Compensación Automatizado S.A. 33,33 33,33 33,33 2,788 2,184 1,894 603 293 305 Sociedad Interbancaria de Depósito de Valores S.A. 29,29 29,29 29,29 1,633 1,485 1,233 302 252 223 Cámara de Compensación de Alto Valor S.A. 15,00 15,00 15,00 971 958 945 28 29 58 Administrador Financiero del Transantiago S.A. 20,00 20,00 20,00 3,476 3,986 3,680 337 390 582 Sociedad Nexus S.A. (*) - - 12,90 - - 2,279 - - - Servicios de Infraestructura de Mercado OTC S.A. 12,07 12,07 12,48 1,528 1,556 1,491 (24) 60 57 Subtotal 10,396 10,169 31,995 1,246 1,024 1,225 Shares or rights in other companies Bladex - - - - 13 19 Stock Exchanges - - - 142 109 148 Others - 8 8 - - (67) Total 10,396 10,177 32,003 1,388 1,146 1,325 (*) The Bank has entered into a process of selling the shares in Redbanc S.A., Transbank S.A. and Nexus SA, therefore, the treatment established in IFRS 5 “Non-current assets held for sale and discontinued operations” has been applied, on the participation of said companies, which is described in Note 1 v) and Note 38. As described in Note 1 g), the Bank has irrevocably designated its participation in Bladex and Stock exchanges at fair value through other comprehensive income (FVOCI). Related dividends are recognized in the income statements under “Income from investments in associates and other companies”. The fair value of these equity investments is as follows: December 31, 2020 2019 MCh$ MCh$ Bladex 310 328 Stock exchange 228 154 Others 10 - Total 548 482 b) Summary of financial information of associates as of and for the years ended December 31, 2020, 2019 and 2018: As of December 31, 2020 2019 2018 Net income Net income Net income Assets Liabilities Equity Assets Liabilities Equity Assets Liabilities Equity MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Redbanc S.A. - - - - 23,413 14,106 8,441 866 20,825 12,469 7,505 851 Transbank S.A. - - - - 1,217,448 1,133,441 70,605 13,402 904,558 835,200 56,888 12,470 Centro de Compensación Automatizado S.A. 11,134 2,953 6,371 1,810 8,550 1,998 5,671 881 7,073 1,480 4,677 916 Sociedad Interbancaria de Depósito de Valores S.A. 5,840 314 4,496 1,030 5,074 4 4,209 861 4,392 230 3,400 762 Cámara de Compensación de Alto Valor S.A. 7,158 722 6,246 190 7,372 986 6,193 193 6,728 622 5,722 384 Administrador Financiero del Transantiago S.A. 49,841 30,670 17,227 1,944 54,712 34,787 17,978 1,947 55,818 37,419 15,490 2,909 Sociedad Nexus S.A. - - - - 31,147 13,471 17,660 16 35,139 18,335 13,955 2,849 Servicios de Infraestructura de Mercado OTC S.A. 14,480 2,232 12,441 (193) 15,152 2,682 11,993 477 25,273 13,313 11,506 454 Total 88,453 36,891 46,781 4,781 1,362,868 1,201,475 142,750 18,643 1,059,806 919,068 119,143 21,595 c) Restrictions over the ability of associated companies to transfer funds to investors. There are no significant restrictions regarding the capacity of associates to transfer funds, whether in cash dividends, refund of loans, or advance payments to the Bank. d) Activity with respect to investments in other companies in 2020, 2019 and 2018 is as follows: As of December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Opening balance as of January 1, 10,177 32,003 27,585 Acquisition of investments - - Sale of investments (20) - - Participation in income 1,388 1,146 1,325 Dividends received (508) (130) (38) Other adjustments (*) (641) (22,842) 3,131 Total 10,396 10,177 32,003 (*) The Bank has entered into a process of selling the shares in Redbanc S.A., Transbank S.A. and Nexus SA, Thus, these investments have been reclassified to held for sale and presented under Other assets in the Consolidated Statement of Financial Position. As of December 31, 2020, only Nexus has been sold. Additionally, includes MTM over equity share investment of our subsidiaries.

Intangible Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2019
Disclosure of intangible assets [text block] [Abstract]
INTANGIBLE ASSETS	INTANGIBLE ASSETS a. As of December 31, 2020 and 2019, the composition of intangible assets is as follows: As of December 31, 2020 Average remaining useful life Net opening balance as of January 1, 2020 Gross balance Accumulated amortization Net balance MCh$ MCh$ MCh$ MCh$ Licenses - - 35,997 (35,997) - Software development 2 73,389 248,537 (166,000) 82,537 Total 73,389 284,534 (201,997) 82,537 As of December 31, 2019 Average remaining useful life Net opening balance as of January 1, 2019 Gross balance Accumulated amortization Net balance MCh$ MCh$ MCh$ MCh$ Licenses - 82 35,997 (35,997) - Software development 2 66,841 214,005 (140,616) 73,389 Total 66,923 250,002 (176,613) 73,389 , b. The changes in the value of intangible assets during the periods ended December 31, 2020 and December 31, 2019 is as follows: b.1 Gross balance Gross balances Licenses Software development Total MCh$ MCh$ MCh$ Balances as of January 1, 2020 35,997 214,005 250,002 Acquisitions - 35,170 35,170 Disposals and impairment - (638) (638) Other - - - Balances as of December 31, 2020 35,997 248,537 284,534 Balances as of January 1, 2019 37,224 181,191 218,415 Acquisitions - 32,860 32,860 Disposals and impairment (1,227) - (1,227) Other - (46) (46) Balances as of December 31, 2019 35,997 214,005 250,002 b.2 Accumulated amortization Accumulated amortization Licenses Software development Total MCh$ MCh$ MCh$ Balances as of January 1, 2020 (35,997) (140,616) (176,613) Year’s amortization - (25,384) (25,384) Other changes - - - Balances as of December 31, 2020 (35,997) (166,000) 201,997 Balances as of January 1, 2019 (37,142) (114,350) (151,492) Year’s amortization (82) (26,266) (26,348) Other changes 1,227 - 1,227 Balances as of December 31, 2019 (35,997) (140,616) (176,613) c. The Bank has no restriction on intangible assets as of December 31, 2020 and 2019. Additionally, intangible assets have not been pledged as guarantee for fulfillment of financial liabilities. Also, the Bank has no debt related to Intangible assets as of those dates.

Fixed Assets and Right of Use A

Fixed Assets and Right of Use Assets and Lease Liability	12 Months Ended
	Dec. 31, 2020
Disclosure of quantitative information about leases for lessee [abstract]
FIXED ASSETS AND RIGHT OF USE ASSETS AND LEASE LIABILITY	FIXED ASSETS AND RIGHT OF USE ASSETS AND LEASE LIABILITY a. As of December 31, 2020 and 2019, the composition of property, plant, and equipment balances are composed as follows: As of December 31, 2020 Net opening balance as of January 1, 2020 Gross balance Accumulated depreciation Net balance MCh$ MCh$ MCh$ MCh$ Land and buildings 173,061 308,499 (140,805) 167,694 Equipment 55,494 243,084 (190,636) 52,448 Other 22,206 75,159 (54,447) 20,712 Total 250,761 626,742 (385,888) 240,854 As of December 31, 2019 Net opening balance as of January 1, 2019 Gross balance Accumulated depreciation Net balance MCh$ MCh$ MCh$ MCh$ Land and buildings 174,758 302,405 (129,344) 173,061 Equipment 56,865 219,600 (164,106) 55,494 Other 21,963 69,758 (47,552) 22,206 Total 253,586 591,763 (341,002) 250,761 b. The changes in the value of property, plant, and equipment as of December 31, 2020 and 2019 is as follows: b.1 Gross balance 2020 Land and buildings Equipment Other Total MCh$ MCh$ MCh$ MCh$ Balances as of January 1, 2020 302,405 219,600 69,758 591,763 Additions 17,790 25,233 7,500 50,523 Disposals (11,696) (1,749) (2,099) (15,544) Impairment due to damage (*) - - - - Other - - - - Balances as of December 31, 2020 308,499 243,084 75,159 626,742 2019 Land and buildings Equipment Other Total MCh$ MCh$ MCh$ MCh$ Balances as of January 1, 2019 289,568 192,328 62,156 544,052 Additions 16,486 33,302 7,602 57,390 Disposals (2,636) (6,030) - (8,666) Impairment due to damage (1,013) - - (1,013) Other - - - - Balances as of December 31, 2019 302,405 219,600 69,758 591,763 (*) Banco Santander-Chile has recognized in its consolidated financial statements as of December 31, 2019 impairment of $1,013 million, due to the effects of social unrest in the country. See Note 32. b.2 Accumulated depreciation 2020 Land and buildings Equipment Other Total MCh$ MCh$ MCh$ MCh$ Balances as of January 1, 2020 (129,344) (164,106) (47,552) (341,002) Depreciation charges in the period (19,026) (28,370) (8,915) (56,311) Sales and disposals in the period 12,381 1,840 2,020 16,241 Other (4,816) - - (4,816) Balances as of December 31, 2020 (140,805) (190,636) (54,447) (385,888) 2019 Land and buildings Equipment Other Total MCh$ MCh$ MCh$ MCh$ Balances as of January 1, 2019 (114,810) (135,463) (40,193) (298,472) Depreciation charges in the period (16,018) (29,968) (6,869) (52,855) Sales and disposals in the period 9,490 1,325 - 10,815 Other - - (490) (490) Balances as of December 31, 2019 (121,338) (164,106) (47,552) (332,996) c. The composition of the right of use assets as of December 31, 2020 and 2019 is as follows: As of December 31, 2020 2020 Opening balances as of January 1, 2019 Gross balance Accumulated depreciation Net balance MCh$ MCh$ MCh$ MCh$ Land and building 157,572 197,573 (49,576) 147,997 Other - - - - Total 157,572 197,573 (49,576) 147,997 As of December 31, 2019 2019 First application balance as of January 1, 2019 Gross balance Accumulated depreciation Net balance MCh$ MCh$ MCh$ MCh$ Land and building 154,284 182,910 (25,338) 157,572 Other - - - - Total 154,284 182,910 (25,338) 157,572 d. The movement of the right of use assets under lease during the 2020 and 2019 period, is as follows: d.1 Gross balance 2020 Land and building Other Total MCh$ MCh$ MCh$ Balances as of January 1, 2020 182,910 - 182,910 Additions 24,136 - 24,136 Disposals (9,473) - (9,473) Impairment - - - Other - - - Balances as of December 31, 2020 197,573 - 197,573 2019 Land and building Other Total MCh$ MCh$ MCh$ Balances as of January 1, 2019 154,284 - 154,284 Additions 48,008 - 48,008 Disposals (17,669) - (17,669) Impairment (1,713) - (1,713) Other - - - Balances as of December 31, 2019 182,910 - 182,910 d.2 Accumulated amortization 2020 Land and building Other Total MCh$ MCh$ MCh$ Balances as of January 1, 2020 (25,338) - (25,338) Amortization for the period (27,731) - (27,731) Sales and disposals during the period 3,496 - 3,496 Transfers - - - Others (3) - (3) Balances as of December 31, 2020 (49,576) - (49,576) 2019 Land and building Other Total MCh$ MCh$ MCh$ Balances as of January 1, 2019 - - - Amortization for the period (26,889) - (26,889) Sales and disposals during the period 1,551 - 1,551 Transfers - - - Others - - - Balances as of December 31, 2019 (25,338) - (25,338) e. Lease liability: As of December 31, 2020 and 2019, the composition of lease liability balances are composed as follows: As of December 31, 2020 2019 MCh$ MCh$ Lease liability 149,585 158,494 Total 149,585 158,494 An explanation of the difference between operating lease commitment under IAS 17 at December 31, 2018 and initial application of IFRS 16 as of January 1, 2019 is as follows: MCh$ Operating lease commitments as at December 31, 2018 173,602 Discounted using the lessee´s incremental borrowing rate of at the date of initial application 14,726 Lease liabilities recognized due to IFRS 16 implementation 139,558 Lease liability recognized as at January 1, 2019 154,284 f. Expenses associated with assets for the right of use leased assets and lease liability As of December 31, 2020 2019 MCh$ MCh$ Depreciation 27,731 26,889 Interests 2,651 2,965 Short term lease 1,625 4,177 Total 32,007 34,031 g. As of December 31, 2020 and 2019, the maturity level of the lease liability, according to their contractual maturity is as follows: As of December 31, 2020 2019 MCh$ MCh$ Due within 1 year 25,526 26,061 Due after 1 year but within 2 years 23,461 24,311 Due after 2 years but within 3 years 21,472 21,667 Due after 3 years but within 4 years 19,343 19,411 Due after 4 years but within 5 years 16,336 16,982 Due after 5 years 43,447 50,062 Total 149,585 158,494 h. Operational leases – lessor As of December 31, 2020 and 2019, the future minimum lease cash inflows under non-cancellable operating leases are as follows: As of December 31, 2020 2019 MCh$ MCh$ Due within 1 year 740 603 Due after 1 year but within 2 years 1,015 598 Due after 2 years but within 3 years 736 500 Due after 3 years but within 4 years 639 498 Due after 4 years but within 5 years 448 412 Due after 5 years 1,283 1,563 Total 4,861 4,174 i. As of December 31, 2020 and 2019, the Bank has no financial leases which cannot be unilaterally rescinded. j. The Bank has no restriction on property, plant and equipment as of December 31, 2020 and 2019. Additionally, the property, plant and equipment have not been provided as guarantees of financial liabilities. The Bank has no debt in connection with property, plant and equipment.

Current and Deferred Taxes

Current and Deferred Taxes	12 Months Ended
	Dec. 31, 2020
Disclosure of Current and Deferred Taxes [Abstract]
CURRENT AND DEFERRED TAXES	CURRENT AND DEFERRED TAXES a) Current taxes As of December 31, 2020 and 2019, the Bank recognizes taxes payable (recoverable), which is determined based on the currently applicable tax legislation, This amount is recorded net of recoverable taxes, and is shown as follows: As of December 31, 2020 2019 MCh$ MCh$ Summary of current tax liabilities (assets) Current tax (assets) (11,648) Current tax liabilities 12,977 - Total tax payable (recoverable) 12,977 (11,648) (Assets) liabilities current taxes detail (net) Income tax, tax rate 174,205 153,424 Minus: Provisional monthly payments (157.648) (159,943) Credit for training expenses (2.137) (2,145) Grant credits (1.360) (1,149) Other (83) (1,835) Total tax payable 12,977 (11,648) b) Effect on income The effect of income tax expense on income for the years ended December 31, 2020, 2019 and 2018 is comprised of the following items: As of December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Income tax expense Current tax 174,205 153,424 196,527 Credits (debits) for deferred taxes Origination and reversal of temporary differences (28,465) 37,432 (25,517) Valuation provision - - (56) Subtotals 145,740 190,856 170,954 Tax for rejected expenses (Article No21) 1,354 927 1,110 Other (4,561) (16,709) (4,920) Net charges for income tax expense 142,533 175,074 167,144 c) Effective tax rate reconciliation The reconciliation between the income tax rate and the effective rate applied in determining tax expenses as of December 31, 2020, 2019 and 2018, is as follows: For the year ended, 2020 2019 2018 Tax rate Amount Tax rate Amount Tax rate Amount % MCh$ % MCh$ % MCh$ Tax calculated over profit before tax 27.00 187,721 27.00 214,566 27.00 207,046 Price level restatement for tax purposes (1) (6.15) (42,730) (6.33) (50,297) (5.15) (39,494) Single penalty tax (rejected expenses) 0.19 1,354 0.12 927 0.14 1,110 Other (0.55) (3,812) 1.24 9,878 (0.20) (1,518) Effective tax rates and expenses for income tax 20.50 142,533 22.03 175,074 21.79 167,144 (1) Mainly corresponds to the permanent differences originated from the Own Tax Monetary Correction and the effect of the bonds received to article 104 of LIR. d) Effect of deferred taxes on comprehensive income Below is a summary of the separate effect of deferred tax on other comprehensive income, showing the asset and liability balances, for the years ended December 31, 2020 and 2019: As of December 31, 2020 2019 MCh$ MCh$ Deferred tax assets Debt instruments at FVOCI 14,907 8,074 Cash flow hedges 36,927 10,918 Total deferred tax assets recognized through other comprehensive income 51,834 18,992 Deferred tax liabilities Debt instruments at FVOCI (42,371) (15,830) Cash flow hedges - - Total deferred tax liabilities recognized through other comprehensive income (42,371) (15,830) Net deferred tax balances in equity 9,463 3,162 Deferred taxes in equity attributable to shareholders of the Bank 9,776 3,444 Deferred tax in equity attributable to non-controlling interests (313) (282) e) Effect of deferred taxes on income As of December 31, 2020 and 2019, the Bank has recorded effects for deferred taxes in the financial statements: As of December 31, 2020 2019 MCh$ MCh$ Deferred tax assets Interests and adjustments 8,166 9,531 Extraordinary charge-offs 17,705 15,325 Assets received in lieu of payment 1,425 1,214 Exchange rate adjustments 89 - Property, plant and equipment valuation - - 6,381 Allowance for loan losses 238,670 188,956 Provision for expenses 101,321 89,098 Leased assets 89,458 116,226 Subsidiaries tax losses 7,394 5,416 Right of use assets 428 249 Total deferred tax assets 464,656 432,396 Deferred tax liabilities Valuation of investments (19,967) (17,518) Fixed assets valuation (7,394) - Prepaid expenses (16,691) (20,347) Valuation provision (5,775) (6,058) Derivatives (37,265) (36,512) Exchange rate adjustments - - (2,817) Other (30) (75) Total deferred tax liabilities (87,122) (83,327) f) Summary of deferred tax assets and liabilities Below is a summary of the deferred taxes impact on equity and income: As of December 31, 2020 2019 MCh$ MCh$ Deferred tax assets Recognized through other comprehensive income 51,834 18,992 Recognized through profit or loss 464,656 432,396 Total deferred tax assets 516,490 451,388 Deferred tax liabilities Recognized through other comprehensive income (42,371) (15,830) Recognized through profit or loss (87,122) (83,327) Total deferred tax liabilities (129,493) (99,157)

Other Assets

Other Assets	12 Months Ended
	Dec. 31, 2020
Disclosure of other assets [text block] [Abstract]
OTHER ASSETS	OTHER ASSETS Other Assets includes the following: As of December 31, 2020 2019 MCh$ MCh$ Assets for leasing (1) 62,967 67,139 Assets received or awarded in lieu of payment Assets received in lieu of payment 15,213 18,755 Assets awarded at judicial sale 17,430 22,177 Provision on assets received in lieu of payment or awarded (1,196) (2,042) Subtotal 31,447 38,890 Other assets Guarantee deposits (margin accounts) (2) 608,359 314,616 Non-current assets classified as held for sale (3) 22,036 22,394 Gold investments 765 680 VAT credit 27,519 22,663 Income tax recoverable - 1,787 Prepaid expenses (4) 387,668 432,030 Assets recovered from leasing for sale 3,191 3,575 Valuation adjustments by macro hedge (5) 327,938 210,867 Pension plan assets 673 670 Accounts and notes receivable 100,504 147,108 Notes receivable through brokerage and simultaneous transactions 41,960 43,354 Other receivable assets 33,567 44,262 Other assets (6) 98,780 89,111 Subtotal 1,652,960 1,333,117 Total 1,747,374 1,439,146 (1) Assets available to be granted under the financial leasing agreements. (2) Guarantee deposits (margin accounts) correspond to collateral associated with derivative financial contracts to mitigate the counterparty credit risk and are mainly established in cash. These guarantees operate when mark to market of derivative financial instruments exceed the levels of threshold agreed in the contracts, which could result in the Bank delivering or receiving collateral. (3) Corresponds to the interests in Redbanc S.A., Transbank S.A. and Nexus S.A., which have been reclassified as non-current assets classified as held for sale in accordance with IFRS 5 “Non-current assets held for sale and discontinued operations”, for additional information see Note 1 v) and Note 38. (4) Under this item, the Bank has recorded prepaid expense related to the Santander LATAM Pass program, which is consumed on a monthly basis in accordance with the client use of Bank’s transactional products and therefore the Bank assigned the respective LATAM Pass miles. In May 2020, LATAM Airlines Group S.A began a reorganization process under Chapter 11, with an aim to was continue operating. LATAM has publicly stated its intention to honor all current and future tickets, as well as travel vouchers, miles and frequent flyer programs, which has been ratified by the bankruptcy court of New York (in charge of chapter 11). In addition, LATAM has formalized two tranches of the DIP (Debtor in Possession) financing proposal for a total of USD 2,200 million, obtaining all resources necessary to continue operating during the crisis. On October, the company made its first disbursement for US$1,150 million from the DIP financing, which represents 50% of the amount available. (5) Net assets and liabilities fair value valuation subject to macro hedges. See Note 7 (6) Other assets mainly include settlement of derivatives and other financial transactions.

Time Deposits and Other Time Li

Time Deposits and Other Time Liabilities	12 Months Ended
	Dec. 31, 2020
Time Deposits and Other Time Liabilities [Abstract]
TIME DEPOSITS AND OTHER TIME LIABILITIES	TIME DEPOSITS AND OTHER TIME LIABILITIES As of December 31, 2020 and 2019, the composition of the line item time deposits and other liabilities is as follows: As of December 31, 2020 2019 MCh$ MCh$ Deposits and other demand liabilities Checking accounts 11,342,648 8,093,108 Other deposits and demand accounts 1,583,183 741,103 Other demand liabilities 1,635,062 1,463,221 Subtotal 14,560,893 10,297,432 Time deposits and other time liabilities Time deposits 10,421,872 13,064,932 Time savings account 153,330 123,787 Other time liabilities 6,589 4,098 Subtotal 10,581,791 13,192,817 Total 25,142,684 23,490,249

Interbank Borrowings

Interbank Borrowings	12 Months Ended
	Dec. 31, 2020
Disclosure of borrowings [text block] [Abstract]
INTERBANK BORROWINGS	INTERBANK BORROWINGS As of December 31, 2020 and 2019 the line item Interbank borrowings is as follows: As of December 31, 2020 2019 MCh$ MCh$ Loans from financial institutions and the Central Bank of Chile 4,959,260 - Loans from domestic financial institutions 217,102 286,603 Loans from foreign financial institutions Banco Santander S.A., Madrid 534.496 - The Bank of Nova Scotia 171.024 134,819 The Bank of New York Mellon 106.860 119,616 Bank of America N.A. US Foreig 90.711 355,051 Zurcher Kantonalbank 71.304 - Wells Fargo Bank N.A. 71.259 231,823 State Bank of India 36.013 28,231 Sumitomo Mitsui Banking Corporation 35.628 179,415 Wachovia Bank NA 10.254 - Banco Santander Hong Kong 7.960 3,697 Bank of Tokio Mitsubishi 2.055 156 Banco Santander Brasil S.A. 1.694 7,873 Standard Chartered Bank 1.691 153,373 Jp Morgan Chase, New York 1.571 - Standard Chartered Bank 1.516 3,613 Caja Madrid - Caja de Ahorros 862 - The Hongkong and Shanghai Bank 801 - Korea Exchange Bank 760 761 Industrial and Commercial Bank 755 898 Hong Kong and Shanghai Banking 598 684 Kookmin Bank 376 185 Banco Do Brasil 265 - U.S. Bank 248 - China Merchants Bank 231 597 Taiwan Cooperative Bank 227 131 Bank of China 223 952 Hua Nan Commercial Bank Ltd. 200 102 Banque Bruxelles Lambert S.A. 174 - Banca Monte Dei Paschi Di Siena 163 58 Unicredito Italiano Spa 161 583 Keb Hana Bank 156 119 Banco Santander Central Hispano 141 848 Bper Banca S.P.A. 137 - Hdfc Bank Limited 131 72 Bank Leumi Le Israel B.M. 127 - Bank of Baroda 124 9 Fortis Bank S.A./N.V. Brussels 108 50 Banca Commerciale Italiana 88 50 Caixa Destalvis I Pensions de Barcelona 87 63 Banco Bpm Spa 84 66 Rabobank, Hong Kong Branch 79 477 Banco de la Republica Oriental 74 23 Kbc Bank Nv 68 406 Canara Bank 61 66 Habib Bank Limited 61 38 First Union National Bank 60 - Caixabank S.A. 58 166 Icici Bank Limited 52 - Kotak Mahindra Bank Limited 49 - Citibank N.A. 46 269,841 Arab Bank Plc 41 - China Construction Bank 38 - Credit Agricole Italia S.P.A. 33 - Bankinter, S.A. 31 - Banco de La Nacion Argentina 30 - Bank of East Asia, Limited 29 82 Banco Popular Espanol, S.A. 29 - Banco Interamericano de Finanz 20 - Agricultural Bank of China 18 152 Woori Bank 15 155 Denizbank A.S., Istanbul 15 - United Bank of India 14 113 Banco Popolare 14 - Subtotal 1,152,199 1,495,414 As of December 31, 2020 2019 MCh$ MCh$ Loans from foreign financial institutions, continued Habib Metropolitan Bank Limite 13 - E. Sun Commercial Bank Ltd. 11 159 Nova Ljubljanska Banka D.D. 7 - Indian Overseas Bank 6 - Shanghai Commercial and Saving 1 6 Mizuho Bank Ltd Ny - 269,404 Barclays Bank Plc London - 98,803 Corporacion Andina De Fomento - 75,097 Zürcher Kantonalbank - 75,002 The Toronto Dominion Bank - 71,191 Hsbc Bank PLC - 69,786 Bank of Montreal - 56,123 Banco Latinoamericano de Comer - 18,731 Banco Bilbao Vizcaya Argentaria - 571 BBVA Bancomer, S.A. - 553 Bank of Communications - 385 Bank of The West - 261 Danske Bank A/S - 224 Deutsche Bank A.G. - 193 Bank of Taiwan - 135 Shinhan Bank - 133 Banca Di Credito Cooperativo 112 Joint Stock Commercial Bank Fo. - 110 Banca Nazionale Del Lavoro S.P - 106 Industrial Bank of Korea - 96 Banco Bradesco S.A. - 84 Bank of Ningbo - 83 China Everbright Bank - 70 Cassa Di Risparmio Di Parma E - 69 Mizuho Corporate Bank Ltd. - 67 Banco Comercial Portugues - 63 Shanghai Pudong Development Ba - 59 Kasikornbank Public Company Li - 33 Banco Rio de La Plata S.A. - 24 Australia And New Zealand Bank - 23 Citic Industrial Bank - 19 Shangai Pudong Development Ban - 14 Banco Caixa Geral - 10 Hsbc Bank USA - 2 Subtotal 38 737,801 Total 6,328,599 2,519,818 a) Loans from the Chilean Central Bank In response to the COVID-19 pandemic, the Chilean Central Bank has made two lines of credit available to banks to reinforce their liquidity, amounting to a total of US$24 billion for the whole banking system. These lines of credit bear interest at the Central Bank’s monetary policy rate (MPR), which was 0.5% as of December 31, 2020. Pursuant to these lines of credit, a bank may borrow up to 3% of the aggregate amount of its consumer and commercial loan portfolios as of February 29, 2020 and may borrow up to an additional 12% if it uses the funds to provide loans to companies and individuals. The first line of credit is a facility available conditionally on loan growth (the “FCIC”) to ensure that banks continue to finance households and businesses in Chile. Loans provided by this line of credit may have maturities of up to 4 years and must be secured by government bonds, corporate bonds or highly rated large commercial loans as collateral. Loans provided under the second line of credit, the LCL, are unsecured and may have maturities of up to 2 years. In addition, the LCL are limited to the aggregate amount of the liquidity reserve requirements of each bank. As of December 31, 2020 2019 MCh$ MCh$ Due within 1 year - - Due within 1 and 2 year 1,104,759 - Due within 2 and 3 year - - Due within 3 and 4 year 3,854,501 - Due after 5 years - - Total loans from Chilean Central Bank 4,959,260 - b) Loans from domestic financial institutions These obligations’ maturities are as follows: As of December 31, 2020 2019 MCh$ MCh$ Due within 1 year 217,102 158,855 Due within 1 and 2 year 117,344 Due within 2 and 3 year - 8,167 Due within 3 and 4 year - 2,237 Due after 5 years - - Total loans from domestic financial institutions 217,102 286,603 c) Foreign obligations As of December 31, 2020 2019 MCh$ MCh$ Due within 1 year 1,116,570 1,970,790 Due within 1 and 2 year 35,667 225,025 Due within 2 and 3 year - 37,400 Due within 3 and 4 year - - Due after 5 years - - Total loans from foreign financial institutions 1,152,237 2,233,215

Issued Debt Instruments and Oth

Issued Debt Instruments and Other Financial Liabilities	12 Months Ended
	Dec. 31, 2020
Issued Debt Instruments and Other Financial Liabilities [Abstract]
Schedule of maturities of subordinated bonds	ISSUED DEBT INSTRUMENTS AND OTHER FINANCIAL LIABILITIES As of December 31, 2020 and 2019, composition of this item is as follows: As of December 31, 2020 2019 MCh$ MCh$ Other financial liabilities Obligations to public sector - 9,198 Other domestic obligations 175,344 204,705 Foreign obligations 8,974 12,455 Subtotals 184,318 226,358 Issued debt instruments Mortgage finance bonds 12,314 18,502 Senior bonds 6,749,989 8,574,213 Mortgage bond 84,335 89,924 Subordinated bonds 1,357,539 818,084 Subtotals 8,204,177 9,500,723 Total 8,388,495 9,727,081 Debts classified as current are either demand obligations or will mature in one year or less. All other debts are classified as non-current, The Bank’s debts, both current and non-current, are summarized below: As of December 31, 2020 Current Non-current Total MCh$ MCh$ MCh$ Mortgage finance bonds 4,982 7,332 12,314 Senior bonds 1,124,558 5,625,431 6,749,989 Mortgage bond 5,465 78,870 84,335 Subordinated bonds - 1,357,539 1,357,539 Issued debt instruments 1,135,005 7,069,172 8,204,177 Other financial liabilities 184,028 290 184,318 Total 1,319,033 7,069,462 8,388,495 As of December 31, 2019 Current Non-current Total MCh$ MCh$ MCh$ Mortgage finance bonds 6,013 12,489 18,502 Senior bonds 2,078,202 6,496,011 8,574,213 Mortgage bond 5,137 84,787 89,924 Subordinated bonds - 818,084 818,084 Issued debt instruments 2,089,352 7,411,371 9,500,723 Other financial liabilities 226,033 325 226,358 Total 2,315,385 7,411,696 9,727,081 a) Mortgage finance bonds These bonds are used to finance mortgage loans. Their principal amounts are amortized on a quarterly basis. The range of maturities of these bonds is between five and twenty years, Loans are indexed to UF and create a yearly interest yield of 5.20% as of December 31, 2020 (5.39% as of December 31, 2019). As of December 31, 2020 2019 MCh$ MCh$ Due within 1 year 4,982 6,013 Due after 1 year but within 2 years 3,816 4,944 Due after 2 year but within 3 years 2,375 3,928 Due after 3 year but within 4 years 979 2,442 Due after 4 year but within 5 years 162 1,005 Due after 5 years - 170 Total mortgage bonds 12,314 18,502 b) Senior bonds The following table shows senior bonds by currency: As of December 31, 2020 2019 MCh$ MCh$ Santander bonds in UF 4,017,708 4,814,604 Santander bonds in USD 1,263,714 1,649,238 Santander bonds in CHF 466,738 499,485 Santander bonds in Ch$ 639,489 1,242,633 Santander bonds in AUD 125,781 124,748 Current bonds in JPY 68,093 77,797 Santander bonds in EUR 168,466 165,708 Total senior bonds 6,749,989 8,574,213 i. Placement of senior bonds: In 2020, the Bank issued bonds for UF 1,996,000 and USD 742,500,000 detailed as follows: Series Currency Amount Term Issuance rate Series approval date Series maximum amount Maturity date W1 UF 1,996,000 5 and 3 months 1.55% annual 02-04-2018 2,000,000 06-01-2025 Total UF 1,996,000 2,000,000 US Bonds USD 742,500,000 5 years 2,70% annual 01-07-2020 750,000,000 01-07-2025 Total USD 742,500,000 750,000,000 During 2020, the Bank performed a partial repurchase of the following bonds: Fecha Tipo Moneda Monto 01-02-2020 Senior UF 357,000 01-03-2020 Senior UF 300,000 01-09-2020 Senior UF 60,000 01-09-2020 Senior UF 27,000 01-13-2020 Senior CLP 50,000,000 01-14-2020 Senior UF 109,000 01-14-2020 Senior CLP 9,820,000,000 01-14-2020 Senior UF 131,000 01-14-2020 Senior UF 322,000 01-15-2020 Senior USD 2,490,000 01-15-2020 Senior UF 47,000 01-16-2020 Senior CLP 400,000,000 01-16-2020 Senior UF 1,000 01-17-2020 Senior UF 28,000 01-20-2020 Senior UF 74,000 01-21-2020 Senior UF 171,000 01-21-2020 Senior UF 181,000 01-21-2020 Senior CLP 330,000,000 01-22-2020 Senior CLP 11,430,000,000 01-24-2020 Senior UF 2,000 01-29-2020 Senior UF 1,000 01-29-2020 Senior CLP 120,000,000 01-30-2020 Senior CLP 10,000,000 01-31-2020 Senior UF 40,000 02-06-2020 Senior CLP 6,000,000,000 02-07-2020 Senior CLP 1,180,000,000 02-11-2020 Senior CLP 7,430,000,000 02-12-2020 Senior CLP 2,520,000,000 02-13-2020 Senior CLP 10,000,000,000 02-17-2020 Senior UF 2,000 02-17-2020 Senior UF 15,000 02-18-2020 Senior UF 50,000 02-18-2020 Senior UF 4,000 02-20-2020 Senior UF 350,000 02-20-2020 Senior UF 115,000 02-21-2020 Senior UF 57,000 02-21-2020 Senior UF 24,000 02-24-2020 Senior UF 250,000 02-24-2020 Senior UF 10,000 02-26-2020 Senior UF 169,000 02-26-2020 Senior UF 1,000 02-27-2020 Senior UF 180,000 02-27-2020 Senior UF 11,000 02-27-2020 Senior CLP 6.750.000.000 03-02-2020 Senior UF 1.000 03-05-2020 Senior UF 2.000 03-09-2020 Senior UF 261.000 03-09-2020 Senior UF 150.000 03-11-2020 Senior UF 2.000 03-17-2020 Senior UF 850.000 03-18-2020 Senior UF 150.000 Fecha Tipo Moneda Monto 03-19-2020 Senior USD 5.000.000 03-23-2020 Senior UF 95.000 03-23-2020 Senior USD 5.000.000 03-24-2020 Senior CLP 1.250.000.000 03-30-2020 Senior UF 62.000 03-31-2020 Senior UF 360.000 03-31-2020 Senior UF 5.000 04-01-2020 Senior CLP 1.000.000.000 04-02-2020 Senior UF 5.184.000 04-02-2020 Senior CLP 16.710.000.000 04-03-2020 Senior CLP 32.800.000.000 04-03-2020 Senior UF 27.000 04-06-2020 Senior CLP 101.400.000.000 04-06-2020 Senior UF 157.000 04-06-2020 Senior USD 10.000.000 04-07-2020 Senior CLP 3.990.000.000 04-07-2020 Senior UF 6.659.000 04-07-2020 Senior USD 10.000.000 04-08-2020 Senior CLP 210.000.000 04-13-2020 Senior CLP 970.000.000 04-14-2020 Senior CLP 2.000.000.000 04-17-2020 Senior CLP 11.900.000.000 05-05-2020 Senior USD 49.000.000 05-14-2020 Senior USD 47.000.000 06-02-2020 Senior CLP 6.020.000.000 06-03-2020 Senior UF 100.000 06-03-2020 Senior CLP 10.750.000.000 06-05-2020 Senior USD 5.000.000 06-08-2020 Senior CLP 23.000.000.000 06-12-2020 Senior CLP 150.000.000 06-16-2020 Senior CHF 12.160.000 06-17-2020 Senior CHF 36.785.000 06-19-2020 Senior CLP 112.490.000.000 06-22-2020 Senior CLP 1.500.000.000 06-26-2020 Senior CLP 3.500.000.000 07-02-2020 Senior CLP 4.620.000.000 07-10-2020 Senior CHF 2.000.000 07-10-2020 Senior CLP 500.000.000 07-15-2020 Senior CLP 490.000.000 07-17-2020 Senior UF 1.000 07-17-2020 Senior CLP 29.780.000.000 08-13-2020 Senior UF 345.000 08-14-2020 Senior USD 3.350.000 08-21-2020 Senior UF 100.000 08-21-2020 Senior UF 77.000 08-24-2020 Senior UF 11.000 08-25-2020 Senior UF 14.000 09-09-2020 Senior UF 24.000 09-09-2020 Senior UF 70.000 09-09-2020 Senior UF 45.000 09-10-2020 Senior UF 210.000 09-23-2020 Senior USD 5.000.000 09-28-2020 Senior UF 50.000 09-29-2020 Senior UF 1.000 09-30-2020 Senior UF 43.000 10-01-2020 Senior UF 4,000 10-06-2020 Senior UF 1,000 10-06-2020 Senior UF 1,000 10-06-2020 Senior CLP 50,000,000 10-06-2020 Senior UF 1,000 10-06-2020 Senior UF 1,000 10-15-2020 Senior UF 2,000 10-20-2020 Senior CHF 2,000,000 10-01-2020 Senior USD 5,153,000 10-19-2020 Senior USD 20,000,000 11-16-2020 Senior USD 1,000,000 11-18-2020 Senior USD 10,000,000 11-15-2020 Senior USD 477,510,000 In 2019, the Bank issued bonds for UF 29,678,000; CLP 115,000,000,000; EUR 30,000,000; AUD 160,000,000 and CHF 250,000,000 detailed as follows: Series Currency Amount Term Issuance rate Series approval date Series maximum amount Maturity date T7 UF 5,000,000 4 2,50% 02-01-2016 5,000,000 02-01-2023 T8 UF 5,678,000 4 y 6 2,55% 02-01-2016 5,678,000 08-01-2023 T14 UF 9,000,000 8 2,80% 02-01-2016 18,000,000 02-01-2027 T6 UF 5,000,000 10 1,70% 11-01-2018 5,000,000 05-01-2029 T10 UF 5,000,000 5 y 4 2,60% 02-01-2016 5,000,000 08-01-2024 Total UF 29,678,000 38,678,000 U9 CLP 75,000,000,000 2 y 8 ICP + 0,80% yearly 11-01-2018 75,000,000,000 11-19-2021 P-5 CLP 75,000,000,000 2 y 7 5,3% yearly 03-01-2015 150,000,000,000 03-01-2022 Total CLP 150,000,000,000 225,000,000,000 EUR EUR 30,000,000 7 1,10% 02-01-2019 40,000,000 02-07-2026 EUR EUR 25,000,000 5 1,25% 11-26-2019 25,000,000 11-26-2034 Total EUR 55,000,000 65,000,000 AUD AUD 22,000,000 15 3,66% yearly 05-20-2019 22,000,000 05-20-2034 AUD AUD 20,000,000 5 1,13% yearly 07-11-2019 20,000,000 07-11-2024 AUD AUD 28,000,000 5 1,13% yearly 07-17-2019 28,000,000 07-17-2024 AUD AUD 15,000,000 5 1,13% yearly 07-17-2019 15,000,000 07-17-2024 AUD AUD 75,000,000 20 3,05% yearly 08-30-2019 75,000,000 02-28-2039 AUD AUD 12,000,000 5 3,16% yearly 11-12-2019 12,000,000 11-20-2034 AUD AUD 13,000,000 5 2,91% yearly 11-21-2019 13,000,000 11-27-2034 Total 185,000,000 185,000,000 CHF CHF 150,000,000 5 y 6 0,38% yearly 03-12-2019 150,000,000 09-27-2024 CHF CHF 100,000,000 10 0,14% yearly 08-29-2019 100,000,000 08-29-2029 Total CHF 250,000,000 250,000,000 During 2019, the Bank performed a partial repurchase of the following bonds: Date Type Currency Amount 02-12-2019 Senior CLP 10,000,000,000 02-14-2019 Senior CLP 30,000,000,000 02-19-2019 Senior CLP 4,200,000,000 02-22-2019 Senior CLP 14,240,000,000 02-22-2019 Senior CLP 30,000,000 02-22-2019 Senior CLP 10,000,000 03-01-2019 Senior CLP 11,800,000,000 03-04-2019 Senior CLP 40,080,000,000 03-05-2019 Senior CLP 20,000,000,000 03-15-2019 Senior UF 156,000 03-19-2019 Senior UF 418,000 03-20-2019 Senior CLP 6,710,000,000 03-20-2019 Senior UF 154,000 03-21-2019 Senior UF 100,000 03-25-2019 Senior UF 100,000 03-26-2019 Senior UF 90,000 04-08-2019 Senior CLP 3,950,000,000 04-10-2019 Senior UF 409,000 04-16-2019 Senior UF 55,000 04-17-2019 Senior CLP 130,000,000 04-18-2019 Senior CLP 330,000,000 05-16-2019 Senior CLP 14,880,000,000 05-16-2019 Senior UF 9,000 06-13-2019 Senior UF 1,000 10-01-2019 Senior CLP 10,960,000,000 10-02-2019 Senior CLP 100,000,000 10-04-2019 Senior CLP 60,000,000 11-05-2019 Senior CLP 15,220,000,000 11-07-2019 Senior CLP 3,620,000,000 11-13-2019 Senior CLP 5,320,000,000 11-14-2019 Senior UF 2,977,000 11-28-2019 Senior UF 340,000 12-02-2019 Senior UF 105,000 ii. The maturities of senior bonds are as follows: As of December 31, 2020 2019 MCh$ MCh$ Due within 1 year 1,124,558 2,078,202 Due after 1 year but within 2 years 1,047,241 1,147,825 Due after 2 year but within 3 years 742,081 1,221,393 Due after 3 year but within 4 years 1,228,524 742,238 Due after 4 year but within 5 years 1,250,897 1,278,746 Due after 5 years 1,356,688 2,105,809 Total senior bonds 6,749,989 8,574,213 c) Mortgage bonds Detail of mortgage bonds per currency is as follows: As of December 31, 2020 2019 MCh$ MCh$ Mortgage bonds in UF 84,335 89,924 Total mortgage bonds 84,335 89,924 i. Allocation of mortgage bonds During 2020 and 2019, the Bank has not placed any mortgage bonds. ii. The maturities of Mortgage bonds are as follows: As of December 31, 2020 2019 MCh$ MCh$ Due within 1 year 5,465 5,137 Due after 1 year but within 2 years 8,773 8,248 Due after 2 year but within 3 years 9,056 8,514 Due after 3 year but within 4 years 9,348 8,788 Due after 4 year but within 5 years 9,649 9,072 Due after 5 years 42,044 50,165 Total Mortgage bonds 84,335 89,924 d) Subordinated bonds Detail of the subordinated bonds per currency is as follows: As of December 31, 2020 2019 MCh$ MCh$ Subordinated bonds denominated in USD 202,634 - Subordinated bonds denominated in UF 1,154,905 818,084 Total subordinated bonds 1,357,539 818,084 i. Placement of subordinated bonds As of December 31, 2020, the Bank issued bonds for USD200,000,000 and UF11,000,000 detailed as follows: Series Currency Amount Term Issuance rate Series approval date Series maximum amount Maturity date Bono USD USD 200,000,000 10 years 3.79% 01-21-2020 200,000,000 01-21-2030 Total USD 200,000,000 200,000,000 USTDH20914 UF 3,000,000 14 years y 5 months 3.00% 04-07-2020 3,000,000 09-01-2034 USTDH30914 UF 3,000,000 19 years y 5 months 3.15% 04-07-2020 3,000,000 09-01-2039 USTDW20320 UF 5,000,000 15 years y 3 months 3.50% 06-19-2020 5,000,000 09-01-2035 Total UF 11,000,000 11,000,000 ii. The maturities of Mortgage bonds are as follows: As of December 31, 2020 2019 MCh$ MCh$ Due within 1 year - - Due after 1 year but within 2 years - - Due after 2 year but within 3 years - - Due after 3 year but within 4 years - - Due after 4 year but within 5 years - - Due after 5 years 1,357,539 818,084 Total subordinated bonds 1,357,539 818,084 e) Other financial liabilities The composition of other financial obligations, by maturity, is detailed below: As of December 31, 2020 2019 MCh$ MCh$ Non-current portion: Due after 1 year but within 2 years 42 41 Due after 2 year but within 3 years 47 44 Due after 3 year but within 4 years 50 48 Due after 4 year but within 5 years 55 53 Due after 5 years 96 132 Non-current portion subtotal 290 318 Current portion: Amounts due to credit card operators 134,790 151,984 Acceptance of letters of credit 1,460 5,709 Other long-term financial obligations, short-term portion 47,778 68,347 Current portion subtotal 184,028 226,040 Total other financial liabilities 184,318 226,358

Maturity of Financial Assets an

Maturity of Financial Assets and Liabilities	12 Months Ended
	Dec. 31, 2019
Maturity of Financial Assets and Liabilities [Abstract]
MATURITY OF FINANCIAL ASSETS AND LIABILITIES	MATURITY OF FINANCIAL ASSETS AND LIABILITIES As of December 31, 2020 and 2019, the detail of the maturities of assets and liabilities is as follows: As of December 31, 2020 Demand Up to 1 month Between 1 and 3 months Between 3 and 12 months Subtotal up to 1 year Between 1 and 3 years Between 3 and 5 years More than 5 years Subtotal More than 1 year Total MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Financial assets Cash and deposits in banks 2,803,288 - - - 2,803,288 - - - - 2,803,288 Cash items in process of collection 452,963 - - - 452,963 - - - - 452,963 Financial assets held for trading - 680 2,630 499 3,809 633 18,257 111,019 129,909 133,718 Investments under resale agreements - - - - - - - - - - Financial derivative contracts - 385,231 401,486 795,881 1,582,598 1,723,334 1,692,142 4,034,011 7,449,487 9,032,085 Loans and accounts receivables at amortized cost (*) 170,214 1,246,271 1,443,659 3,664,841 6,524,985 3,659,994 293,785 23,861,129 27,814,908 34,339,893 Loans and account receivable at FVOCI (**) 5,405 5,405 16,243 49,037 65,280 70,685 Debt instruments at FVOCI - 1,006,983 493 188,977 1,196,453 205,150 2,378,752 3,382,187 5,966,089 7,162,542 Equity instruments at FVOCI - - - - - - - 548 548 548 Guarantee deposits (margin accounts) 608,359 - - - 608,359 - - - - 608,359 Total financial assets 4,034,824 2,639,165 1,848,268 4,655,603 13,177,860 5,589,111 4,399,179 31,437,931 41,426,221 54,604,081 Financial liabilities Deposits and other demand liabilities 14,560,893 - - - 14,560,893 - - - - 14,560,893 Cash items in process of being cleared 361,631 - - - 361,631 - - - - 361,631 Obligations under repurchase agreements - 969,808 - - 969,808 - - - - 969,808 Time deposits and other time liabilities 159,918 5,843,682 2,912,985 1,434,246 10,350,831 163,053 44,384 23,523 230,960 10,581,791 Financial derivative contracts - 386,690 445,376 931,358 1,763,424 1,552,482 1,708,509 3,994,245 7,255,236 9,018,660 Interbank borrowings 16,832 238,414 222,992 855,434 1,333,672 1,140,426 3,854,501 - 4,994,927 6,328,599 Issued debt instruments - 344,732 447,117 343,156 1,135,005 1,813,341 2,499,560 2,756,271 7,069,172 8,204,177 Lease liabilities 144,478 38,148 1,375 27 184,028 89 105 96 290 184,318 Other financial liabilities - - - 25,526 25,526 44,933 35,679 43,447 124,059 149,585 Guarantees received (margin accounts) 624,205 - - - 624,205 - - - - 624,205 Total financial liabilities 15,867,957 7,821,474 4,029,845 3,589,747 31,309,023 4,714,324 8,142,738 6,817,582 19,674,644 50,983,667 (*) Loans and accounts receivables at amortized cost are presented on a gross basis, the amount of allowance is Ch$1,036,793 million. (**) Loans and accounts receivables at FVOCI are presented on a gross basis, the amount of allowance is Ch$1,354 million. As of December 31, 2019 Demand Up to 1 month Between 1 and 3 months Between 3 and 12 months Subtotal up to 1 year Between 1 and 3 years Between 3 and 5 years More than 5 years Subtotal More than 1 year Total MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Financial assets Cash and deposits in banks 3,554,520 - - - 3,554,520 - - - - 3,554,520 Cash items in process of collection 355,062 - - - 355,062 - - - - 355,062 Financial assets held for trading - 38,644 - 645 39,289 181,705 37,659 11,551 230,915 270,204 Investments under resale agreements - - - - - - - - - - Financial derivative contracts - 371,775 400,196 1,543,446 2,315,417 1,383,493 1,346,329 3,103,369 5,833,191 8,148,608 Loans and accounts receivables at amortized cost (*) 296,461 2,963,578 2,400,909 5,511,374 11,172,322 5,706,433 4,093,147 11,699,613 21,499,193 32,671,515 Loans and account receivable at FVOCI (**) - - - 5,953 5,953 - - 60,213 60,213 66,166 Debt instruments at FVOCI - 1,131,500 3,752 52,130 1,187,382 508,596 725,419 1,588,875 2,822,890 4,010,272 Equity instruments at FVOCI - - - - - - - 482 482 482 Guarantee deposits (margin accounts) 314,616 - - - 314,616 - - - - 314,616 Total financial assets 4,520,659 4,505,497 2,804,857 7,113,548 18,944,561 7,780,227 6,202,554 16,464,103 30,446,884 49,391,445 Financial liabilities Deposits and other demand liabilities 10,297,432 - - - 10,297,432 - - - - 10,297,432 Cash items in process of being cleared 198,248 - - - 198,248 - - - - 198,248 Obligations under repurchase agreements - 380,055 - - 380,055 - - - - 380,055 Time deposits and other time liabilities 142,273 5,184,567 4,905,414 2,417,703 12,649,957 357,856 163,121 21,883 542,860 13,192,817 Financial derivative contracts - 422,749 427,825 951,684 1,802,258 1,253,280 1,180,948 3,154,168 5,588,396 7,390,654 Interbank borrowings 94 363,560 624,167 1,141,824 2,129,645 387,936 2,237 - 390,173 2,519,818 Issued debt instruments - 285,159 759,519 1,044,674 2,089,352 2,394,850 2,042,292 2,974,229 7,411,371 9,500,723 Lease liabilities - - - 26,061 26,061 45,978 36,393 50,062 132,433 158,494 Other financial liabilities 161,021 5,155 30,969 28,888 226,033 83 99 143 325 226,358 Guarantees received (margin accounts) 994,714 - - - 994,714 - - - - 994,714 Total financial liabilities 11,793,782 6,641,245 6,747,894 5,610,834 30,793,755 4,439,983 3,425,090 6,200,485 14,065,558 44,859,313 (*) Loans and accounts receivables at amortized cost are presented on a gross basis, the amount of allowance is Ch$ 896,095 million. (**) Loans and accounts receivables at FVOCI are presented on a gross basis, the amount of allowance is Ch$101 million.

Provisions and Contingent Provi

Provisions and Contingent Provisions	12 Months Ended
	Dec. 31, 2020
Disclosure of provisions [text block] [Abstract]
PROVISIONS AND CONTINGENT PROVISIONS	PROVISIONS AND CONTINGENT PROVISIONS a) As of December 31, 2020 and 2019, the composition is as follows: As of December 31, 2020 2019 MCh$ MCh$ Provisions for personnel salaries and expenses 104,270 101,223 Provisions for mandatory dividends 164,284 185,727 Provisions for contingent loan 28,247 23,240 Provision for contingencies 33,863 15,940 Total 330,664 326,130 b) Below is the activity regarding provisions during the years ended December 31, 2020, 2019 and 2018 Personnel and expenses Mandatory Contingent Contingencies Total MCh$ MCh$ MCh$ MCh$ MCh$ Balances as of January 1, 2020 101,223 185,727 23,240 15,940 326,130 Provisions established 76,281 164,284 14,683 25,367 280,615 Application of provisions (71,481) - - - (71,481) Provisions released (1,755) (185,727) (9,676) (7,444) (204,602) Reclassifications - - - - - Other 2 - - - 2 Balances as of December 31, 2020 104,270 164,284 28,247 33,863 330,664 Balances as of January 1, 2019 93,379 178,600 23,709 9,583 305,271 Provisions established 78,316 185,727 15,879 28,373 308,295 Application of provisions (70,385) - - (155) (70,540) Provisions released (552) (178,600) (16,348) (21,861) (217,361) Reclassifications - - - - - Other 465 - - - 465 Balances as of December 31, 2019 101,223 185,727 23,240 15,940 326,130 Balances as of January 1, 2018 97,576 168,840 9,480 27,902 303,798 Provisions established 80,912 178,600 19,240 19,647 298,399 Application of provisions (72,975) - - (4,431) (77,406) Provisions released (3,195) (168,840) (5,011) (33,535) (210,581) Reclassifications - - - - - Other (8,939) - - - (8,939) Balances as of December 31, 2018 93,379 178,600 23,709 9,583 305,271 c) Provisions for personnel salaries and expenses includes: As of December 31, 2020 2019 MCh$ MCh$ Provision for seniority compensation 6,658 6,797 Provision for stock-based personnel benefits - - Provision for performance bonus 65,786 68,595 Provision for vacations 29,307 23,864 Provision for other personnel benefits 2,519 1,967 Total 104,270 101,223 d) Provisions for contingent loan risk Provision for contingent loan arise from contingent liabilities and loan commitments. Provisions for ECL risks in respect of contingent loan are included in ECL allowance in the income statements for the year. An analysis of changes in the corresponding ECL allowance as of December 31, 2020 and 2019 is as follows: December 31, 2020 Stage 1 Stage 2 Stage 3 TOTAL Individual Collective Individual Collective Individual Collective ECL allowance at January 1, 2020 1,509 13,127 226 542 3,487 4,349 23,240 Transfer Transfers from stage 1 to stage 2 (1,273) (3,614) 1,785 13,442 - - 10,340 Transfers from stage 1 to stage 3 - (76) - - 83 2,757 2,764 Transfers from stage 2 to stage 3 - - (73) (148) 2,839 1,720 4,338 Transfers from stage 2 to stage 1 165 2,687 (295) (9,274) - - (6,717) Transfers from stage 3 to stage 2 - - - 240 (6) (1,934) (1,700) Transfers from stage 3 to stage 1 - 14 - - - (444) (430) Net changes on financial assets 2,279 (200) 126 (315) (2,995) (1,748) (2,853) Write-off - - - - - - - Other adjustment 135 (928) (6) 65 (170) 169 (735) At December 31, 2020 2,815 11,010 1,762 4,552 3,238 4,869 28,247 December 31, 2019 Stage 1 Stage 2 Stage 3 TOTAL Individual Collective Individual Collective Individual Collective ECL allowance at January 1, 2019 1,081 15,070 259 172 3,856 3,271 23,709 Transfer Transfers to stage 2 (100) (318) 122 878 - - 582 Transfers to stage 3 - (203) - - 167 4,675 4,639 Transfers to stage 3 - - (24) (144) 1,742 1,290 2,864 Transfers to stage 1 46 122 (82) (473) - - (387) Transfers to stage 2 - - - 234 (54) (1,444) (1,264) Transfers to stage 1 - 45 - - (130) (1,278) (1,363) Net changes on financial assets 491 (1,474) (41) (106) (2,100) 2,173 (5,471) Write-off - - - - - - - Other adjustments (9) (115) (8) (19) 6 8 (137) At December 31, 2019 1,509 13,127 226 542 3,487 4,349 23,240

Other Liabilities

Other Liabilities	12 Months Ended
	Dec. 31, 2020
Disclosure of other liabilities [text block] [Abstract]
OTHER LIABILITIES	OTHER LIABILITIES The other liabilities line item is as follows: As of December 31, 2020 2019 MCh$ MCh$ Accounts and notes payable 227,518 214,216 Income received in advance 828 640 Macro-hedge valuation adjustment 51,089 - Guarantees received (margin accounts) (1) 624,205 994,714 Notes payable through brokerage and simultaneous transactions (3) 12,504 1,418,340 Other payable obligations (2) 139,622 61,555 Withholding VAT 14,129 8,147 Accounts payable insurance companies 13,911 9,510 Other liabilities 82,047 99,203 Total 1,165,853 2,806,325 (1) Guarantee deposits (margin accounts) correspond to collateral associated to derivative financial contracts to mitigate the counterparty credit risk and are mainly established in cash. These guarantees operate when mark to market of derivative financial instruments exceed the levels of threshold agreed in the contracts, which could result in the Bank delivering or receiving collateral. (2) Other payable obligations mainly relate to settlement of derivatives and other financial transactions derived from the operation of the Bank. (3) In December 2019, Santander Corredora de Bolsa acted as an intermediary in the public offering of shares between Latam and Delta, which was paid to shareholders on January 3, 2019.

Contingencies and Commitments

Contingencies and Commitments	12 Months Ended
	Dec. 31, 2020
Disclosure of commitments and contingent liabilities [text block] [Abstract]
CONTINGENCIES AND COMMITMENTS	CONTINGENCIES AND COMMITMENTS a) Lawsuits and legal procedures As of the issuance date of these financial statements, the Bank and its affiliates were subject to certain legal actions in the normal course of their business, As of December 31, 2020, the Bank and its subsidiaries have provisions for this item of Ch$1,024 (Ch$1,274 million as of December 31, 2019) which is included in “Provisions” in the Consolidated Statements of Financial Position as provisions for contingencies. b) Contingent loans The following table shows the Bank’s contractual obligations to issue loans: As of December 31, 2020 2019 MCh$ MCh$ Letters of credit issued 165,119 140,572 Foreign letters of credit confirmed 82,779 70,192 Performance guarantee 1,090,643 1,929,894 Personal guarantees 441,508 451,950 Total contingent liabilities 1,780,049 2,592,608 Available on demand credit lines 8,391,414 8,732,422 Other irrevocable credit commitments 406,234 485,991 Total loan commitment 8,797,648 9,218,413 Total 10,577,697 11,811,021 c) Held securities The Bank holds securities in the normal course of its business as follows: As of December 31, 2020 2019 MCh$ MCh$ Third party operations Collections 83,392 90,966 Transferred financial assets managed by the Bank 18,017 21,507 Assets from third parties managed by the Bank and its affiliates 1,352,032 1,592,845 Subtotal 1,453,441 1,705,318 Custody of securities Securities held in custody 11,022,790 9,731,894 Securities held in custody deposited in other entity 808,186 1,206,541 Issued securities held in custody 10,461,847 21,636,819 Subtotal 22,292,823 32,575,254 Total 23,746,264 34,280,572 During 2020, the Bank classified the portfolios managed by private banking in “Assets from third parties managed by the Bank and its affiliates” (memo account). At the end of December 2020, the balance for this was Ch$1,351,997 million (Ch$1,592,810 million at December 31, 2019). d) Guarantees Banco Santander-Chile has an integral bank policy of coverage of Official Loyalty N°5014196 in force with the company Compañía de Seguros Chilena Consolidada S.A., coverage for USD50,000,000 per claim with an annual limit of USD100,000,000, which covers both the Bank and its subsidiaries, with an expiration date of June 30, 2021, which has been renewed. e) Contingent loans and liabilities The Bank took on several contingent loans and liabilities, to satisfy its clients’ needs, that are not be recognized in the Consolidated Financial Statements of Financial Position; these contain loan risks and they are, therefore, part of the Bank’s global risk.

Equity

Equity	12 Months Ended
	Dec. 31, 2020
Disclosure of share capital, reserves and other equity interest [text block] [Abstract]
EQUITY	EQUITY a) Capital As of December 31, 2020 and 2019 the Bank had 188,446,126,794 shares outstanding, all of which are subscribed for and paid in full, amounting to Ch$891,303 million. All shares have the same rights, and have no preferences or restrictions. The activity with respect to shares during 2020, 2019 and 2018 was as follows: SHARES As of December 31, 2020 2019 2018 Issued as of January 1 188,446,126,794 188,446,126,794 188,446,126,794 Issuance of paid shares - - - Issuance of outstanding shares - - - Stock options exercised - - - Issued as of December 31, 188,446,126,794 188,446,126,794 188,446,126,794 As of December 31, 2020, 2019 and 2018 the Bank does not have any of its own shares in treasury, nor do any of the consolidated companies. As of December 31, 2020 the shareholder composition was as follows: Corporate Name or Shareholder’s Name Shares ADRs (*) Total % of equity holding Santander Chile Holding S.A. 66,822,519,695 - 66,822,519,695 35.46 Teatinos Siglo XXI Inversiones Limitada 59,770,481,573 - 59,770,481,573 31.72 The Bank New York Mellon - 22,450,671,671 22,450,671,671 11.91 Banks on behalf of third parties 15,925,407,468 - 15,925,407,468 8.45 Pension funds (AFP) on behalf of third parties 9,929,343,874 - 9,929,343,874 5.27 Stock brokers on behalf of third parties 6,892,162,980 - 6,892,162,980 3.66 Other minority holders 6,655,539,533 - 6,655,539,533 3.53 Total 165,995,455,123 22,450,671,671 188,446,126,794 100.00 (*) American Depository Receipts (ADR) are certificates issued by a U.S. commercial bank to be traded on the U.S. securities markets. As of December 31, 2019 the shareholder composition was as follows: Corporate Name or Shareholder’s Name Shares ADRs (*) Total % of equity holding Santander Chile Holding S.A. 66,822,519,695 - 66,822,519,695 35.46 Teatinos Siglo XXI Inversiones Limitada 59,770,481,573 - 59,770,481,573 31.72 The Bank New York Mellon - 24,822,041,271 24,822,041,271 13.17 Banks on behalf of third parties 15,957,137,883 - 15,957,137,883 8.47 Pension funds (AFP) on behalf of third parties 9,995,705,956 - 9,995,705,956 5.30 Stock brokers on behalf of third parties 5,551,024,270 - 5,551,024,270 2.95 Other minority holders 5,527,216,146 - 5,527,216,146 2.93 Total 163,624,085,523 24,822,041,271 188,446,126,794 100.00 (*) American Depository Receipts (ADR) are certificates issued by a U.S. commercial bank to be traded on the U.S. securities markets. As of December 31, 2018 the shareholder composition was as follows: Corporate Name or Shareholder’s Name Shares ADRs (*) Total % of equity holding Santander Chile Holding S.A. 66,822,519,695 - 66,822,519,695 35.46 Teatinos Siglo XXI Inversiones Limitada 59,770,481,573 - 59,770,481,573 31.72 The Bank New York Mellon - 26,486,000,071 26,486,000,071 14.05 Banks on behalf of third parties 15,770,481,573 - 15,770,481,573 8.20 Pension funds (AFP) on behalf of third parties 9,033,172,896 - 9,033,172,896 4.79 Stock brokers on behalf of third parties 4,773,558,507 - 4,773,558,507 2.53 Other minority holders 6,109,287,067 - 6,109,287,067 3.25 Total 161,960,126,723 26,486,000,071 188,446,126,794 100.00 (*) American Depository Receipts (ADR) are certificates issued by a U.S. commercial bank to be traded on the U.S. securities markets. b) Reserves During 2020, on the Shareholders Meeting held in April, it was agreed to capitalize on reserves 40% of retained earnings from previous years, equivalent to MCh$220,838 (MCh$236,761 and MCh$141,204 in the year 2019 and 2018 respectively). c) Dividends The distribution of dividends is detailed in the Consolidated Statements of Changes in Equity. d) As of December 31, 2020, 2019 and 2018 the basic and diluted earnings per share were as follows: As of December 31, 2020 2019 2018 MCh$ MCh$ MCh$ a) Basic earnings per share Total attributable to the shareholders of the Bank 547,614 619,091 595,333 Weighted average number of outstanding shares 188,446,126,794 188,446,126,794 188,446,126,794 Basic earnings per share (in Ch$) 2.906 3.285 3.159 Basic earnings per share from continuing operations (in Ch$) 2.906 3.276 3.139 Basic earnings per share from discontinued operations (in Ch$) - 0.009 0.020 b) Diluted earnings per share Total attributable to the shareholders of the Bank 547,614 619,091 595,333 Weighted average number of outstanding shares 188,446,126,794 188,446,126,794 188,446,126,794 Adjusted number of shares 188,446,126,794 188,446,126,794 188,446,126,794 Diluted earnings per share (in Ch$) 2.906 3.285 3.159 Diluted earnings per share from continuing operations (in Ch$) 2.906 3.276 3.139 Diluted earnings per share from discontinued operations (in Ch$) - 0.009 0.020 As of December 31, 2020, 2019 and 2018 the Bank does not own instruments with dilutive effects. e) Other comprehensive income from available for sale investments and cash flow hedges: For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Debt instruments at FVOCI As of January 1, 29,184 6,962 1,855 Gain (losses) on the re-measurement of debt instruments at FVOCI, before tax 30,062 (17,775) 6,609 Recycling from other comprehensive income to income for the year 43,609 39,997 (1,502) Subtotals 73,671 22,222 5,107 Total 102,885 29,184 6,962 Cash flow hedges As of January 1, (40,435) 9,803 (3,562) Gains (losses) on the re-measurement of cash flow hedges, before tax (93,182) (49,163) 14,048 Recycling adjustments on cash flow hedges, before tax (3,148) (1,075) (683) Amounts removed from equity and included in carrying amount of non-financial asset (liability) which acquisition or incurrence was hedged as a highly probable transaction - - - Subtotals (96,330) (50,238) 13,365 Total (136,765) (40,435) 9,803 Other comprehensive income, before taxes (33,910) (11,251) 16,765 Income tax related to other comprehensive income components Income tax relating to debt instruments at FVOCI (27,464) (7,756) (1,810) Income tax relating to cash flow hedges 36,927 10,918 (2,646) Total 9,463 3,162 (4,456) Other comprehensive income, net of tax (24,447) (8,089) 12,309 Attributable to: Shareholders of the Bank (25,293) (8,856) 11,353 Non-controlling interest 846 767 956 The Bank expects that the results included in “Other comprehensive income” will be reclassified to profit or loss when the specific conditions have been met.

Non-controlling Interest

Non-controlling Interest	12 Months Ended
	Dec. 31, 2020
Disclosure of non-controlling interests [text block] [Abstract]
NON-CONTROLLING INTEREST	NON-CONTROLLING INTEREST a) The non-controlling interest included in the equity and the income from the subsidiaries is summarized as follows: Other comprehensive income As of December 31, 2020 Non- Equity Income Debt instruments Deferred tax Total other Comprehensive % MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Subsidiaries: Santander Corredora de Seguros Limitada 0,25 174 (4) (4) 1 (3) (7) Santander Corredores de Bolsa Limitada 49,41 22.614 351 (38) 9 (29) 322 Santander Asesorías Financieras Limitada 0,97 493 (5) 152 (41) 111 106 Santander S.A. Sociedad Securitizadora 0,36 2 - - - - - Klare Corredora de Seguros S.A. 49,90 2.902 (880) - - - (880) Santander Consumer Chile S.A. 49,00 29.649 5,619 - - - 5,619 Subtotal 55,834 5,081 110 (31) 79 5,160 Entities controlled through other considerations: Santander Gestión de Recaudación y Cobranzas Limitada 100,00 4,808 (127) - - - (127) Bansa Santander S.A. 100,00 19,565 349 - - - 349 Multiplica Spa 100,00 4,476 (187) - - - (187) Subtotal 28,849 35 35 Total 84,683 5,116 110 (31) 79 5,195 Other comprehensive income As of December 31, 2019 Non- Equity Income Debt instruments Deferred tax Total other Comprehensive % MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Subsidiaries: Santander Corredora de Seguros Limitada 0.25 178 6 1 - 1 7 Santander Corredores de Bolsa Limitada 49.41 22,301 625 (261) 71 (190) 435 Santander Asesorías Financieras Limitada(1) 0.97 498 9 - - - 9 Santander S.A. Sociedad Securitizadora 0.36 2 - - - - - Klare Corredora de Seguros S.A. 49.90 3,782 (503) - - - (503) Santander Consumer Chile S.A. (2) 49.00 24,564 1,544 - - - 1,544 Subtotal 51,325 1,681 (260) 71 (189) 1,492 Entities controlled through other considerations: Santander Gestión de Recaudación y Cobranzas Limitada 100.00 3,777 1,031 - - - 1,031 Bansa Santander S.A. 100.00 20,051 (486) - - - (486) Multiplica Spa 100.00 4,480 (4) - - - (4) Subtotal 28,308 541 - - - 541 Total 79,633 2,222 (260) 71 (189) 2,033 (1) Formerly Santander Agente de Valores Limitada (2) On November 27, 2019, the Bank acquired 51% of Santander Consumer S.A., and the remaining 49% is accounted as non-controlling interest. Other comprehensive income As of December 31, 2018 Non-controlling Equity Income Available for sale investments Deferred tax Total other comprehensive income Comprehensive income % MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Subsidiaries: Santander Corredora de Seguros Limitada 0.25 172 4 (2) - (2) 2 Santander Corredores de Bolsa Limitada 49.41 21,673 755 (84) 2 (82) 673 Santander Agente de Valores Limitada 0.94 488 99 - - - 99 Santander S.A. Sociedad Securitizadora 0.36 2 - - - - - Subtotal 22,335 858 (86) 2 (84) 774 Entities controlled through other considerations: Santander Gestión de Recaudación y Cobranzas Limitada 100.00 3,777 852 - - - 852 Bansa Santander S.A. 100.00 20,051 2,650 - - - 2,650 Subtotals 23,828 3,502 - - - 3,502 Total 46,163 4,360 (86) 2 (84) 4,276 b) The overview of the financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests is as follows, which does not include consolidation or conforming accounting policy adjustments: As of December 31, 2020 2019 2018 Assets Liabilities Capital Net Assets Liabilities Capital Net Assets Liabilities Capital Net MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Santander Corredora de Seguros Limitada 79,936 10,777 70,554 (1,395) 82,918 12,372 68,159 2,387 77,764 9,595 66,374 1,795 Santander Corredores de Bolsa Limitada 94,802 49,038 45,053 711 1,479,974 1,434,843 43,866 1,265 102,228 57,999 42,691 1,538 Santander Asesorias Financieras Limitada(*) 52,070 1,142 51,454 (526) 51,505 51 50,481 973 50,552 71 40,177 10,304 Santander S.A. Sociedad Securitizadora 630 175 547 (92) 636 88 639 (91) 704 66 728 (90) Klare Corredora de Seguros S.A. 6,415 599 7,579 (1,763) 8,303 724 8,586 (1,007) - - - - Santander Consumer Chile S.A. 693,992 633,177 49,348 11,467 505,059 452,528 39,951 12,580 - - - - Sociedad operadora de Tarjetas de Pago Santander Getnet Chile S.A. 16,448 1,185 16,273 (1,010) Santander Gestión de Recaudación y Cobranzas Ltda. 7,789 3,108 4,808 (127) 8,200 3,392 3,777 1,031 6,932 3,155 2,925 852 Bansa Santander S.A. 84,496 64,582 19,565 349 87,607 68,042 20,051 (486) 20,437 386 17,401 2,650 Multiplica Spa 4,336 47 4,476 (187) 4,480 4 4,480 (4) - - - - Total 1,040,914 763,830 269,657 7,427 2,228,682 1,972,044 239,990 16,648 258,617 71,272 170,296 17,049

Interest Income

Interest Income	12 Months Ended
	Dec. 31, 2020
Disclosure of interest income (expense) [text block] [Abstract]
INTEREST INCOME	INTEREST INCOME This item refers to interest earned in the period from the financial assets whose return, whether implicitly or explicitly, is determined by applying the effective interest rate method, regardless of the value at fair value, as well as the effect of hedge accounting (see c). a) For the years ended December 31, 2020, 2019 and 2018 the income from interest, was attributable to the following items: For the years ended December 31, 2020 2019 2018 Interest Inflation Prepaid fees Total Interest Inflation Prepaid fees Total Interest Inflation Prepaid fees Total Items MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Resale agreements 124 - - 124 718 - - 718 903 - - 903 Interbank loans 36 - - 36 1,263 - - 1,263 897 - - 897 Commercial loans 722,116 174,360 10,207 906,683 780,284 160,462 16,478 957,224 771,405 153,851 11,008 936,264 Mortgage loans 322,687 314,777 491 637,955 349,663 283,820 455 633,938 330,055 266,691 909 597,655 Consumer loans 564,363 338 5,245 569,946 593,705 384 8,107 602,196 579,929 439 6,166 586,534 Investment instruments 69,276 36,141 - 105,417 71,150 26,169 - 97,319 75,423 24,790 - 100,213 Other interest income 9,078 4,384 - 13,462 18,387 3,592 - 21,979 16,644 4,013 - 20,657 Interest income not including income from hedge accounting 1,687,680 530,000 15,943 2,233,623 1,815,170 474,427 25,040 2,314,637 1,775,256 449,784 18,083 2,243,123 b) For the years ended December 31, 2020, 2019 and 2018, the expense from interest expense, excluding expense from hedge accounting, is as follows: For the years ended December 31, 2020 2019 2018 Interest Inflation Total Interest Inflation Total Interest Inflation Total Items MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Demand deposits (13,576) (1,526) (15,102) (14,018) (1,508) (15,526) (14,914) (1,371) (16,285) Repurchase agreements (1,899) - (1,899) (9,710) - (9,710) (6,439) - (6,439) Time deposits and liabilities (141,091) (20,876) (161,967) (335,307) (27,172) (362,479) (317,061) (35,284) (352,345) Interbank loans (45,103) - (45,103) (50,354) - (50,354) (39,971) - (39,971) Issued debt instruments (232,551) (140,095) (372,646) (250,512) (145,487) (395,999) (241,455) (133,227) (374,682) Other financial liabilities (637) (11) (648) (1,310) (33) (1,343) (2,698) (110) (2,808) Lease contracts (2,651) - (2,651) (2,965) - (2,965) - - - Other interest expense (9,576) (14,722) (24,298) (16,651) (11,300) (27,951) (6,929) (10,497) (17,426) Interest expense not including expenses from hedge accounting (447,084) (177,230) (624,314) (680,827) (185,500) (866,327) (629,467) (180,489) (809,956) c) For the years ended December 31, 2020, 2019 and 2018, the income and expense from interest is as follows: For the years ended December 31, 2020 2019 2018 Items MCh$ MCh$ MCh$ Interest income not including income from hedge accounting 2,233,623 2,314,637 2,243,123 Interest expense not including expense from hedge accounting (624,314) (866,327) (809,956) Net Interest income (expense) from hedge accounting 1,609,309 1,448,310 1,433,167 Hedge accounting (net) (15,461) (31,346) (18,799) Total net interest income 1,593,848 1,416,964 1,414,368

Fees and Commissions

Fees and Commissions	12 Months Ended
	Dec. 31, 2020
Fees and Commissions [Abstract]
Fees and Commissions	FEES AND COMMISSIONS This item includes the amount of fees earned and paid during the year, except for those which are an integral part of the financial instrument’s effective interest rate: For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Fee and commission income Fees and commissions for lines of credits and overdrafts 7,428 10,315 6,624 Fees and commissions for guarantees and letters of credit 36,277 35,039 33,654 Fees and commissions for card services 196,308 225,702 218,903 Fees and commissions for management of accounts 34,825 35,949 33,865 Fees and commissions for collections and payments 23,242 33,355 40,077 Fees and commissions for intermediation and management of securities 11,272 10,154 10,147 Insurance brokerage fees 39,764 49,664 39,949 Office banking 15,119 13,655 15,921 Fees for other services rendered 44,072 47,331 45,633 Other fees earned 42,855 37,494 39,690 Total 451,162 498,658 484,463 For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Fee and commission expense Compensation for card operation (123,011) (171,513) (163,794) Fees and commissions for securities transactions (896) (1,001) (936) Office banking (2,078) (1,860) (4,096) Interbank services (24,957) (19,839) (14,413) Other fees (32,942) (17,359) (10,339) Total (183,884) (211,572) (193,578) Net fees and commissions income 267,278 287,086 290,885 The fees earned in transactions with letters of credit are presented in the Consolidated Statements of Income in the line item “Interest income”. The income and expenses for the commissions of the business segments are presented below and the calendar for the recognition of income from ordinary activities is opened: Segments Revenue recognition calendar for ordinary As of December 31, 2020 Individuals Companies Global Others Total Transferred Transferred at a Accrual MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Commission income Commissions for lines of credit and overdrafts 6,334 690 398 6 7,428 7,428 - - Commissions for guarantees and letters of credit 11,304 17,505 7,112 356 36,277 36,277 - - Commissions for card services 187,098 6,620 2,568 22 196,308 47,073 149,235 - Commissions for account management 31,508 2,495 819 3 34,825 34,825 - - Commissions for collections, collections and payments 21,281 1,514 367 80 23,242 - 11,303 11,939 Commissions for intermediation and management of values 3,353 299 8,149 (529) 11,272 - 11,272 - Remuneration for insurance commercialization 39,764 - - - 39,764 - - 39,764 Office banking 10,393 4,077 649 - 15,119 - 15,119 - Other remuneration for services rendered 39,318 3,606 1,028 120 44,072 - 44,072 - Other commissions earned 18,948 11,716 12,850 (659) 42,855 - 42,855 - Total 369,301 48,522 33,940 (601) 451,162 125,603 273,856 51,703 Commission expenses Remuneration for card operation (118,255) (3,020) (1,070) (666) (123,011) - (68,550) (54,461) Commissions per transaction with securities - - (69) (827) (896) - (896) - Office banking (1,326) (434) (314) (4) (2,078) - (2,078) - Interbank services (16.073) (5,183) (3,663) (38) (24,957) (24,957) Other commissions (20,216) (1,550) (5,644) (5,532) (32,942) - (32,942) - Total (155,870) (10,187) (10,760) (7,067) (183,884) - (129,423) (54,461) Total Net commission income and expenses 213,431 38,335 23,180 (7,668) 267,278 125,603 144,433 (2,758) The income and expenses for the commissions of the business segments are presented below and the calendar for the recognition of income from ordinary activities is opened. Segments Revenue recognition calendar for ordinary As of December 31, 2019 Individuals and Companies and Global Investment Others Total Transferred over Transferred at a Accrual model MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Commission income Commissions for lines of credit and overdrafts 6,123 935 3,240 17 10,315 10,315 - - Commissions for guarantees and letters of credit 11,553 17,531 5,842 113 35,039 35,039 - - Commissions for card services 218,635 6,042 950 75 225,702 41,347 184,355 - Commissions for account management 32,608 2,515 823 3 35,949 35,949 - - Commissions for collections, collections and payments 36,129 2,185 464 (5,423) 33,355 - 12,854 20,501 Commissions for intermediation and management of values 3,219 245 8,301 (1,611) 10,154 - 10,154 - Remuneration for insurance commercialization 49,664 - - - 49,664 - - 49,664 Office banking 9,280 3,782 606 (13) 13,655 - 13,655 - Other remuneration for services rendered 42,499 3,748 839 245 47,331 - 47,331 - Other commissions earned 12,462 10,727 14,293 12 37,494 - 37,494 - Total 422,172 47,710 35,358 (6,582) 498,658 122,650 305,843 70,165 Commission expenses Remuneration for card operation (168,024) (3,475) (321) 307 (171,513) - (171,513) - Commissions per transaction with securities - - (33) (968) (1,001) - (1,001) - Office banking (1,186) (389) (282) (3) (1,860) - (1,860) - Interbank services (12,776) (4,121) (2,912) (30) (19,839) (19,839) Other commissions (9,559) (1,013) (2,707) (4,080) (8,359) - (8,359) - Total (191,545) (8,998) (6,255) (4,774) (211,572) - (211,572) - Total Net commission income and expenses 230,627 38,712 29,103 (11,356) 287,086 122,650 94,271 70,165

Net Income (Expense) From Finan

Net Income (Expense) From Financial Operations	12 Months Ended
	Dec. 31, 2020
Disclosure of finance income (cost) [text block] [Abstract]
NET INCOME (EXPENSE) FROM FINANCIAL OPERATIONS	NET INCOME (EXPENSE) FROM FINANCIAL OPERATIONS The detail of income (expense) from financial operations is as follows: For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Net gains on trading derivatives 42,704 (162,183) 38,217 Net gains on financial assets at fair value through profit or loss 1,671 11,878 9,393 Net gains on derecognition of financial assets measured at amortized cost 80,679 63,672 8,479 Sale of loans and accounts receivables from customers Current portfolio 48 63 (309) Charged-off portfolio (110) 3,248 709 Repurchase of issued bonds (*) (24,973) 3,073 (1,085) Other income (expense) from financial operations (9,237) 2,084 (2,230) Total income (expense) 90.800 (78,165) 53,174 (*) The Bank repurchased its own bonds, see Note 2 for details.

Net Foreign Exchange Gain (Loss

Net Foreign Exchange Gain (Loss)	12 Months Ended
	Dec. 31, 2020
Disclosure of effect of changes in foreign exchange rates [text block] [Abstract]
NET FOREIGN EXCHANGE GAIN (LOSS)	NET FOREIGN EXCHANGE GAIN (LOSS) Net foreign exchange income includes the income earned from foreign currency trading, differences arising from converting monetary items in a foreign currency to the functional currency, and those generated by non-monetary assets in a foreign currency at the time of their sale, For the years ended December 31, 2020, 2019 and 2018 net foreign exchange income is as follows: For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Net foreign exchange gain (loss) Net profit (loss) from currency exchange differences 90,133 (89,893) (212,618) Hedging derivatives (27,624) 362,374 252,275 Income from assets indexed to foreign currency (3,512) 7,376 12,251 Total 58,997 279,857 51,908

Expected Credit Losses Allowanc

Expected Credit Losses Allowance	12 Months Ended
	Dec. 31, 2020
Disclosure of allowance for credit losses [text block] [Abstract]
EXPECTED CREDIT LOSSES ALLOWANCE	EXPECTED CREDIT LOSSES ALLOWANCE I. Expected credit losses (ECL) allowance – under IFRS 9 As of December 31, 2020 and 2019, under the new credit risk model established by IFRS 9 the ECL allowance by stage recorded at income statements is as follows: For the year ended December 31, 2020 (*) Stage1 Stage2 Stage3 TOTAL Individual Collective Individual Collective Individual Collective MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Commercial loans 20,055 9,617 35,861 23,410 115,730 86,018 290,691 Mortgage loans 0 16,603 0 (5,966) 0 7,636 18,273 Consumer loans 0 19,024 0 (18,914) 0 161,466 161,576 Contingent loans 1,335 (1,600) 1,624 4,023 (14) 423 5,789 Loans and account receivable at FVOCI 1,253 - - - - - 1,253 Debt at FVOCI - 682 - - - - 682 Total 22,643 44,326 37,485 2,552 115,716 255,543 478,264 (*) Includes overlays for an amount of MCh$59,000. See Note 37, Risk management. For the year ended December 31, 2019 Stage1 Stage2 Stage3 TOTAL Individual Collective Individual Collective Individual Collective MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Commercial loans (3,002) (4,930) (10,469) (8,686) (79,501) (33,657) (140,245) Mortgage loans - (1,177) - (4,998) - (8,237) (14,412) Consumer loans - (8,875) - (15,280) - (145,328) (169,483) Contingent loans 45 589 10 24 152 188 1,008 Loans and account receivable at FVOCI 5 - - - - - 5 Debt at FVOCI - (184) - - - - (184) Total (2,952) (14,577) (10,459) (28,940) (79,349) (187,034) (323,311) For the year ended December 31, 2018 Stage1 Stage2 Stage3 TOTAL Individual Collective Individual Collective Individual Collective MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Commercial loans 79 5,652 (2,891) (1,533) (96,131) (47,959) (142,783) Mortgage loans - 5,583 - 5,161 - 3,377 14,121 Consumer loans - 1,861 - 192 - (191,304) (189,251) Contingent loans (90) 1,214 11 (68) (225) (834) 8 Loans and account receivable at FVOCI 363 - 68 - - - 431 Debt at FVOCI - 66 - - - - 66 Total 352 14,376 (2,812) 3,752 (96,356) (236,720) (317,408)

Personnel Salaries and Expenses

Personnel Salaries and Expenses	12 Months Ended
	Dec. 31, 2020
Disclosure of expenses by nature [text block] [Abstract]
PERSONNEL SALARIES AND EXPENSES	PERSONNEL SALARIES AND EXPENSES For the years ended December 31, 2020, 2019 and 2018, the composition of personnel salaries and expenses is as follows: For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Personnel compensation 265,312 260,445 259,354 Bonuses or gratifications 77,046 78,534 72,728 Stock-based benefits (1,589) (315) (337) Seniority compensation 22,380 25,006 21,869 Pension plans 1,026 567 1,069 Training expenses 2,887 4,918 3,782 Day care and kindergarten 2,769 2,731 2,778 Welfare funds 6,531 6,644 6,040 Other personnel expenses 32,308 31,627 30,281 Total 408,670 410,157 397,564

Administrative Expenses

Administrative Expenses	12 Months Ended
	Dec. 31, 2020
Disclosure Of Expenses By Nature 1 Explanatory [Abstract]
ADMINISTRATIVE EXPENSES	ADMINISTRATIVE EXPENSES For the years ended December 31, 2020, 2019 and 2018, the composition of the item is as follows: For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ General administrative expenses 142,848 124,896 145,241 Maintenance and repair of property, plant and equipment 20,300 19,214 20,962 Office lease - - 29,761 Equipment lease - - 55 Short term leases contracts 1,625 4,177 - Insurance payments 5,064 3,848 3,439 Office supplies 4,774 5,126 5,070 IT and communication expenses 68,436 52,017 44,209 Heating, and other utilities 5,455 2,848 4,849 Security and valuables transport services 12,365 12,187 12,168 Representation and personnel travel expenses 2,375 4,109 3,444 Judicial and notarial expenses 860 1,277 1,148 Fees for technical reports and auditing 8,460 7,643 10,020 Other general administrative expenses 13,134 12,450 10,116 Outsourced services 72,513 71,572 65,358 Data processing 38,032 31,921 32,360 Archive services 2,619 3,518 3,401 Valuation services 3,208 3,644 3,167 Outsourcing 6,177 10,139 9,936 Other 22,477 22,350 16,494 Board expenses 1,517 1,356 1,297 Marketing expenses 16,791 20,891 19,286 Taxes, payroll taxes, and contributions 16,781 14,897 13,907 Real estate taxes 2,214 1,954 1,730 Patents 2,135 1,913 1,896 Other taxes 5 5 7 Contributions to FMC (former SBIF) 12,427 11,025 10,274 Total 250,450 233,612 245,089

Depreciation, Amortization, and

Depreciation, Amortization, and Impairment	12 Months Ended
	Dec. 31, 2020
Disclosure of depreciation and amortisation expense [text block] [Abstract]
DEPRECIATION, AMORTIZATION, AND IMPAIRMENT	DEPRECIATION, AMORTIZATION, AND IMPAIRMENT Depreciation, amortization and impairment charges for the years ended December 31, 2020, 2019 and 2018, are detailed below: For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Depreciation and amortization Depreciation of property, plant, and equipment (56,311) (52,855) (54,987) Amortization of Intangible assets (25,384) (26,348) (24,293) Depreciation right of use assets (27,731) (26,889) - Total depreciation and amortization (109,426) (106,092) (79,280) Impairment of property, plant, and equipment - (1,013) (39) Impairment of right of use assets (638) (1,713) - Impairment of intangibles - - - Total impairment (638) (2,726) (39) Total (110,064) (108,818) (79,319)

Other Operating Income and Expe

Other Operating Income and Expenses	12 Months Ended
	Dec. 31, 2020
Disclosure of other operating income (expense) [text block] [Abstract]
OTHER OPERATING INCOME AND EXPENSES	OTHER OPERATING INCOME AND EXPENSES a) Other operating income is comprised of the following components: For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Income from assets received in lieu of payment 5,934 5,613 7,106 Release of contingencies provisions (1) 503 - 12,020 Other income 1,769 7,388 4,003 Leases - - 222 Income from sale of property, plant and equipment (2) 865 2,456 2,490 Compensation from insurance companies due to damages (3) 702 4,681 144 Other 202 251 1,147 Total 8,206 13,001 23,129 (1) In accordance with IAS 37, the Bank recorded contingencies provisions, which in 2018 and 2020 were favorable to the Bank. (2) Legal cession of rights made by Bansa Santander S.A. which resulted in an income of Ch$2,122 million, as of December 31, 2018. (3) Mainly related to recoveries from fraud claims. b) Other operating expenses are detailed as follows: For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Allowances and expenses for assets received in lieu of payment 2,941 3,900 2,537 Provision on assets received in lieu of payment 1,456 1,828 816 Expenses for maintenance of assets received in lieu of payment 1,485 2,072 1,721 Credit card expenses 546 1,077 3,151 Customer services 1,559 2,456 3,635 Other expenses 72,760 41,870 23,019 Operating charge-offs 10,675 8,349 5,694 Life insurance and general product insurance policies (1) 32,987 21,205 9,964 Sale of property plant and equipment - 67 62 Retail association payment 326 343 898 Sale of participation on associates 20 126 - Expense on social commotion event - 1,823 - Leasing land tax (2) 3,174 - - Commercial representation expenses 3,501 256 - Non-recurrent expenses 6,622 - - Other 15,455 9,701 6,401 Total 77,806 49,303 32,342 (1) New Fraud Law became effective on 2020. (2) Annual Land Tax surcharge approved in the Tax Modernization Law of February 24, 2020 .

Transactions with Related Parti

Transactions with Related Parties	12 Months Ended
	Dec. 31, 2020
Disclosure of related party [text block] [Abstract]
TRANSACTIONS WITH RELATED PARTIES	TRANSACTIONS WITH RELATED PARTIES In addition to affiliates and associated entities, the Bank’s “related parties” include its “key personnel” from the executive staff (members of the Bank’s Board of Directors and Managers of Banco Santander-Chile and its affiliates, together with their close relatives), as well as the entities over which the key personnel could exercise significant influence or control. The Bank also considers the companies that are part of the Santander Group worldwide as related parties, given that all of them have a common parent, i.e., Banco Santander S.A. (located in Spain). Transactions between the Bank and its related parties are specified below. To facilitate comprehension, we have divided the information into four categories: Santander Group Companies This category includes all the companies that are controlled by the Santander Group around the world, and hence, it also includes the companies over which the Bank exercises any degree of control (affiliates and special-purpose entities). Associated companies This category includes the entities over which the Bank, in accordance with section b) of Note 1 to these Financial Statements, exercises a significant degree of influence and which generally belong to the group of entities known as “business support companies”. Key personnel This category includes members of the Bank’s Board of Directors and managers of Banco Santander-Chile and its affiliates, together with their close relatives. Other This category encompasses the related parties that are not included in the groups identified above and which are, in general, entities over which the key personnel could exercise significant influence or control. The terms for transactions with related parties are equivalent to those which prevail in transactions made under market conditions or to which the corresponding considerations in kind have been attributed. a) Loans to related parties: Below are loans and accounts receivable as well as contingent loans that correspond to related entities: As of December 31, 2020 2019 2018 Companies of the Group Associated companies Key personnel Other Companies of the Group Associated companies Key personnel Other Companies of the Group Associated companies Key personnel Other MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Loans and accounts receivable: Commercial loans 352,590 265 3,939 900 246,868 375 2,986 685 122,289 459 4,299 233 Mortgage loans - - 22,428 - - - 20,473 - - - 18,814 - Consumer loans - - 6,131 - - - 5,781 - - - 5,335 - Loans and accounts receivable: 352,590 265 32,498 900 246,868 375 29,240 685 122,289 459 28,448 233 Allowance for loan losses (1,138) (9) (137) (14) (122) (182) (179) (10) (308) (9) (116) (5) Net loans 351,452 256 32,361 886 246,746 193 29,061 675 121,981 450 28,332 228 Guarantees 3,323 - 27,203 442 462,513 - 23,918 288 442,854 - 22,893 7,171 Contingent loans: Personal guarantees - - - - - - - - - - - - Letters of credit 3,447 - - 93 4,112 - - 63 5,392 - 2,060 44 Guarantees 811 - - - 464,691 - - - 445,064 - 3,364 - Contingent loans: 4,258 - - 93 468,803 - - 63 450,456 - 5,424 44 Allowance for contingent loans (6) - - - (835) - - - (1) - (18) - Net contingent loans 4,252 - - 93 467,968 - - 63 450,455 - 5,406 44 Loan activity to related parties during 2020, 2019 and 2018 is shown below: As of December 31, 2020 2019 2018 Companies of the Group (*) Associated companies Key Personnel Other Companies of the Group (*) Associated companies Key Personnel Other Companies of the Group (*) Associated companies Key Personnel Other MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Opening balances as of January 1, 715,671 375 29,240 748 572,745 459 33,871 7,899 476,906 771 27,051 7,826 Loans granted 388,896 - 8,080 727 193,798 167 4,826 500 200,657 39 16,574 773 Loans payments (747,719) (110) (4,822) (482) (50,872) (251) (9,457) (7,651) (104,818) (351) (9,754) (700) Total 356,848 265 32,498 993 715,671 375 29,240 748 572,745 459 33,871 7,899 (*) Loans with non-controlled companies (not-consolidated) amount MCh$2,286, MCh$2,059 and MCh$122,289 as of December 31, 2020, 2019 and 2018, respectively. b) Assets and liabilities with related parties As of December 31, 2020 2019 2018 Companies of the Group Associated companies Key personnel Other Companies of the Group Associated companies Key personnel Other Companies of the Group Associated companies Key personnel Other MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Assets Cash and deposits in banks 703,069 - - - 171,816 - - - 189,803 - - - Trading investments - - - - - - - - - - - - Obligations under repurchase agreements Loans - - - - - - - - - - - Financial derivative contracts 978,696 186,038 33 7 2,058,715 218,610 - 55 748,632 105,358 - 9 Debt instrument at FVOCI - - - - - - - - - - - - Other assets 445,609 412,277 - - 185,317 210,579 - - 38,960 51,842 - - Liabilities Deposits and other demand liabilities 17,118 4,484 5,997 3,242 25,261 93,761 4,624 566 27,515 21,577 2,493 480 Obligations under repurchase agreements Loans 961,718 - 101 - 138,498 5,000 270 80 6,501 - 329 68 Time deposits and other time liabilities 1,409,404 100 4,706 864 1,183,235 282,171 4,246 2,204 2,585,337 - 3,189 838 Financial derivative contracts 1,137,502 354,108 - - 2,159,660 288,013 - 3 770,624 112,523 - - Interbank borrowing 544,291 - - - - - - - - - - - Issued debt instruments 349,002 - - - 363,154 - - - 335,443 - - - Other financial liabilities - - - - 6,231 - - - 6,807 - - - Other liabilities 1,210 4,484 5,997 3,242 8,130 146,164 - - 60,884 89,817 - - c) Income (expense) recorded due to transactions with related parties For the years ended December 31, 2020 2019 2018 Companies of the Group Associated Companies Key personnel Other Companies of the Group Associated companies Key personnel Other Companies of the Group Associated Companies Key personnel Other MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Income (expense) recorded Interest income and inflation-indexation adjustments (30,586) 21 1,202 10 (41,181) (5,235) 1,151 26 (53,256) (156) 1,252 508 Fee and commission income and expenses 46,823 22,596 152 24 28,274 14,499 232 28 91,178 7,826 305 22 Net income (expense) from financial operations and net foreign exchange gain (loss) (*) (390,737) 240,565 - - (586,318) (84,236) - - (566,677) 65,727 27 (12) Other operating income and expenses 492 (522) - - 406 (2,026) - - 42 1,388 - - Key personnel compensation and expenses - (31,961) - - - (37,377) - - - (40,683) - Administrative and other expenses (45,478) (16,763) - - (11,877) (47,757) - - (43,035) (50,764) - - Total (419,486) 245,897 (30,607) 34 (610,696) (124,755) (35,994) 54 (571,748) 24,021 (39,099) 518 (*) Primarily relates to derivative contracts used to financially cover exchange risk of assets and liabilities that cover positions of the Bank and its subsidiaries, d) Payments to Board members and key management personnel The compensation received by key management personnel, including Board members and all the executives holding manager positions shown in the “Personnel salaries and expenses” and/or “Administrative expenses” items of the Consolidated Statements of Income, corresponds to the following categories: For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Personnel compensation 16,220 16,264 16,924 Board members’ salaries and expenses 1,452 1,358 1,230 Bonuses or gratifications 12,583 16,104 16,243 Stock-based benefits (1,589) (315) (337) Seniority compensation 1,079 2,378 4,202 Pension plans 1,026 567 1,069 Training expenses 87 37 210 Health funds 276 273 284 Other personnel expenses 827 711 858 Total 31,961 37,377 40,683 (*) Some of the executives that qualified for this benefit left the Group for different reasons, without complying with the requirements to receive the benefit, therefore the obligation amount decreased, which generated the reversal of provisions. e) Composition of key personnel As of December 31, 2020, 2019 and 2018, the composition of the Bank’s key personnel is as follows: Position N° of executives As of December 31, 2020 2019 2018 Director 11 10 11 Division manager 13 12 12 Manager 96 106 108 Total key personnel 120 128 131

Pension Plans

Pension Plans	12 Months Ended
	Dec. 31, 2020
Disclosure of employee benefits [text block] [Abstract]
PENSION PLANS	PENSION PLANS The Bank has an additional benefit available to its principal executives, consisting of a pension plan. The purpose of the pension plan is to endow the executives with funds for a better supplementary pension upon their retirement. For this purpose, the Bank will match the voluntary contributions made by the beneficiaries for their future pensions with an equivalent contribution. The executives will be entitled to receive this benefit only when they fulfill the following conditions: a. Aimed at the Bank’s management b. The general requisite to apply for this benefit is that the employee must be carrying out his/her duties when turning 60 years old c. The Bank will create a pension fund, with life insurance, for each beneficiary in the plan. Periodic contributions into this fund are made by the manager and matched by the Bank d. The Bank will be responsible for granting the benefits directly If the working relationship between the manager and the respective company ends, before s/he fulfills the abovementioned requirements, s/he will have no rights under this benefit plan. In the event of the executive’s death or total or partial disability, s/he will be entitled to receive this benefit. The Bank will make contributions to this benefit plan on the basis of mixed collective insurance policies whose beneficiary is the Bank. The life insurance company with whom such policies are executed is not an entity linked or related to the Bank or any other Santander Group company. Plan Assets owned by the Bank at the end of 2020 totaled MCh$8,224 (MCh$7,195 in 2019). The amount of the defined benefit plans has been quantified by the Bank, based on the following criteria: Calculation method: Use of the projected unit credit method which considers each working year as generating an additional amount of rights over benefits and values each unit separately. It is calculated based primarily on fund contributions, as well as other factors such as the legal annual pension limit, seniority, age and yearly income for each unit valued individually. Assets related to the pension fund contributed by the Bank into the Seguros Euroamérica insurance company with respect to defined benefit plans are presented as net of associated commitments. Actuarial hypothesis assumptions: Actuarial assumptions with respect to demographic and financial variables are non-biased and mutually compatible with each other. The most significant actuarial hypotheses considered in the calculations were: Plans post-employment Plans post-employment 2020 2019 Mortality chart RV-2014 RV-2014 Termination of contract rates 5,0% 5,0% Impairment chart PDT 1985 PDT 1985 Activity for post-employment benefits is as follows: As of December 31, 2020 2019 MCh$ MCh$ Plan assets 8,224 7,195 Commitments for defined-benefit plans For active personnel (7,551) (6,525) Incurred by inactive personnel - - Minus: Unrealized actuarial (gain) losses - - Balances at year end 673 670 Year’s cash flow for post-employment benefits is as follows: For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ a) Fair value of plan assets Opening balance 7,195 6,804 7,919 Expected yield of insurance contracts 385 333 353 Employer contributions 870 859 836 Actuarial (gain) losses - - - Premiums paid - - - Benefits paid (226) (801) (2,304) Fair value of plan assets at year end 8,224 7,195 6,804 b) Present value of obligations Present value of obligations opening balance (6,525) (5,958) (6,998) Net incorporation of Group companies - - - Service cost (1,026) (567) (1,069) Interest cost - - - Curtailment/settlement effect - - - Benefits paid - - - Past service cost - - - Actuarial (gain) losses - - - Other - - 2,109 Present value of obligations at year end (7,551) (6,525) (5,958) Net balance at year end 673 670 846 Plan expected profit: As of December 31, 2020 2019 2018 Type of expected yield from the plan’s assets UF + 2,50% annual UF + 2,50% annual UF + 2,50% annual Type of yield expected from the reimbursement rights UF + 2,50% annual UF + 2,50% annual UF + 2,50% annual Plan associated expenses: For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Current period service expenses 1,026 566 1,069 Interest cost - - - Expected yield from plan’s assets (385) (333) (353) Expected yield of insurance contracts linked to the Plan: - Extraordinary allocations - - - Actuarial (gain)/ losses recorded in the period - - - Past service cost - - - Other - - - Total 641 233 716

Fair Value of Financial Assets

Fair Value of Financial Assets and Liabilities	12 Months Ended
	Dec. 31, 2020
Disclosure of fair value measurement [text block] [Abstract]
FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES	FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The measurement of fair value assumes the sale transaction of an asset or the transference of the liability happens within the main asset or liability market, or the most advantageous market for the asset or liability. For financial instruments with no available market prices, fair values have been estimated by using recent transactions in analogous instruments, and in the absence thereof, the present values or other valuation techniques based on mathematical valuation models sufficiently accepted by the international financial community. In the use of these models, consideration is given to the specific particularities of the asset or liability to be valued, and especially to the different kinds of risks associated with the asset or liability. These techniques are significantly influenced by the assumptions used, including the discount rate, the estimates of future cash flows and prepayment expectations. Hence, the fair value estimated for an asset or liability may not coincide exactly with the price at which that asset or liability could be delivered or settled on the date of its valuation and may not be justified in comparison with independent markets. Except as detailed in the following table, management considers that the carrying amounts of financial assets and financial liabilities recognized in the consolidated financial statements approximate their fair values. Determination of fair value of financial instruments Below is a comparison between the value at which the Bank’s financial assets and liabilities are recorded and their fair value as of December 31, 2020 and 2019: As of December 31, 2020 2019 Book value Fair value Book value Fair value MCh$ MCh$ MCh$ MCh$ Assets Financial derivative contracts 133,718 133,718 8,148,608 8,148,608 Financial assets held for trading 9.032.085 9,032,085 270,204 270,204 Loans and accounts receivable at amortized cost, net 33,303,100 36,921,368 31,775,420 34,602,793 Loans and accounts receivable at FVOCI, net 69,331 69,331 66,065 66,065 Debt instrument at FVOCI 7,162,542 7,162,542 4,010,272 4,010,272 Guarantee deposits (margin accounts) 608,359 608,359 314,616 314,616 Liabilities Deposits and interbank borrowings 31,471,283 32,047,227 26,010,067 26,200,921 Financial derivative contracts 9,018,660 9,018,660 7,390,654 7,390,654 Issued debt instruments and other financial liabilities 8,388,495 9,590,678 9,727,081 10,718,997 Guarantees received (margin accounts) 624,205 624,205 994,714 994,714 The fair value approximates the carrying amount of the following line items due to their short-term nature: cash and deposits-banks, cash items in process of collection and investments under resale or repurchase agreements. In addition, the fair value estimates presented above do not attempt to estimate the value of the Bank’s profits generated by its business activity, nor its future activities, and accordingly, they do not represent the Bank’s value as a going concern. Below is a detail of the methods used to estimate the financial instruments’ fair value. a) Financial assets held for trading and Debt instruments at FVOCI The estimated fair value of these financial instruments was established using market values or estimates from an available dealer, or quoted market prices of similar financial instruments. Investments are evaluated at recorded value since they are considered as having a fair value not significantly different from their recorded value. To estimate the fair value of debt investments or representative values in these lines of businesses, we take into consideration additional variables and elements, as long as they apply, including the estimate of prepayment rates and credit risk of issuers. b) Loans and accounts receivable at amortized cost Fair value of commercial, mortgage and consumer loans and credit cards are measured through a discounted cash flow (DCF) analysis. To do so, we use current market interest rates considering product, term, amount and similar loan quality. Fair value of loans with 90 days or more of delinquency are measured by means of the market value of the associated guarantee, minus the rate and term of expected payment. For variable rate loans whose interest rates change frequently (monthly or quarterly) and that are not subjected to any significant credit risk change, the estimated fair value is based on their book value. c) Deposits Disclosed fair value of deposits that do not bear interest and saving accounts is the amount payable at the reporting date and, therefore, equals the recorded amount. Fair value of time deposits is calculated through a discounted cash flow calculation that applies current interest rates from a monthly calendar of scheduled maturities in the market. d) Short and long term issued debt instruments The fair value of these financial instruments is calculated by using a discounted cash flow analysis based on the current incremental lending rates for similar types of loans having similar maturities. e) Financial derivative contracts The estimated fair value of financial derivative contracts is calculated using the prices quoted on the market for financial instruments having similar characteristics. The fair value of interest rate swaps represents the estimated amount that the Bank determines as exit price in accordance with IFRS 13. If there are no quoted prices from the market (either direct or indirect) for any derivative instrument, the respective fair value estimates have been calculated by using models and valuation techniques such as Black-Scholes, Hull, and Monte Carlo simulations, taking into consideration the relevant inputs/outputs such as volatility of options, observable correlations between underlying assets, counterparty credit risk, implicit price volatility, the velocity with which the volatility reverts to its average value, and the straight-line relationship (correlation) between the value of a market variable and its volatility, among others. Measurement of fair value and hierarchy IFRS 13 - Fair Value Measurement, provides a hierarchy of reasonable values which separates the inputs and/or valuation technique assumptions used to measure the fair value of financial instruments. The hierarchy reflects the significance of the inputs used in making the measurement. The three levels of the hierarchy of fair values are the following: ● Level 1: the inputs are quoted prices (unadjusted) on active markets for identical assets and liabilities that the Bank can access on the measurement date ● Level 2: inputs other than the quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly ● Level 3: inputs are unobservable inputs for the asset or liability i.e. they are not based on observable market data The hierarchy level within which the fair value measurement is categorized in its entirety is determined based on the lowest level of input that is significant to the fair value measurement in its entirety. The best evidence of a financial instrument’s fair value at the initial time is the transaction price. In cases where quoted market prices cannot be observed, Management makes its best estimate of the price that the market would set using its own internal models which in most cases use data based on observable market parameters as a significant input (Level 2) and, in very specific cases, significant inputs not observable in market data (Level 3), various techniques are employed to make these estimates, including the extrapolation of observable market data. Financial instruments at fair value and determined by quotations published in active markets (Level 1) include: - Chilean Government and Department of Treasury bonds - Mutual funds Instruments which cannot be 100% observable in the market are valued according to other inputs observable in the market (Level 2). The following financial instruments are classified under Level 2: Type of financial instrument Model used in valuation Description of unobservable inputs - Mortgage and private bonds Present Value of Cash Flows Model Internal Rates of Return (“IRRs”) are provided by RiskAmerica, according to the following criterion: If, at the valuation day, there are one or more valid transactions at the Santiago Stock Exchange for a given nemotechnic, the reported rate is the weighted average amount of the observed rates. In the case there are no valid transactions for a given mnemonic on the valuation day, the reported rate is the IRR base from a reference structure, plus a spread model based on historical spread for the same item or similar ones. - Time deposits Present Value of Cash Flows Model IRRs are provided by RiskAmerica, according to the following criterion: If, at the valuation day, there are one or more valid transactions at the Santiago Stock Exchange for a given mnemonic, the reported rate is the weighted average amount of the observed rates. In the case there are no valid transactions for a given mnemonic on the valuation day, the reported rate is the IRR base from a reference structure, plus a spread model based on issuer curves. - Constant Maturity Swaps (CMS), FX and Inflation Forward (Fwd), Cross Currency Swaps (CCS), Interest Rate Swap (IRS) Present Value of Cash Flows Model IRRs are provided by ICAP, GFI, Tradition, and Bloomberg according to this criterion: With published market prices, a valuation curve is created by the bootstrapping method and is then used to value different derivative instruments. - FX Options Black-Scholes Formula adjusted by the volatility simile (implicit volatility), Prices (volatility) are provided by BGC Partners, according to this criterion: With published market prices, a volatility parameter is created by interpolation and then these volatilities are used to value options. - Guarantee deposits, guarantee received (Threshold) Present Value of Cash Flows Model Collateral associated to derivatives financial contracts: Average trading swap (CMS), FX and inflation Forward, Cross Currency Swap (CCS), Interest Rate Swap (IRS) y FX options. In limited occasions significant inputs not observable in market data are used (Level 3). Several techniques are used to perform these estimates, including extrapolation of observable market data or a mix of observable data. The following financial instruments are classified under Level 3: Type of financial instrument Model used in valuation Description of no observable inputs - Caps/ Floors/ Swaptions Black Normal Model for Cap/Floors and Swaptions There is no observable input of implicit volatility. - UF options Black – Scholes There is no observable input of implicit volatility. - Cross currency swap with window Hull-White Hybrid HW model for rates and Brownian motion for FX There is no observable input of implicit volatility. - CCS (special contracts) Implicit Forward Rate Agreement (FRA) Start Fwd unsupported by MUREX (platform) due to the UF forward estimate. - Cross currency swap, Interest rate swap, Call money swap in Tasa Activa Bancaria (Active Bank Rate) TAB, Present Value of Cash Flows Model Validation obtained by using the interest curve and interpolating flow maturities, but TAB is not a directly observable variable and is not correlated to any market input. - Debt instruments (in our case, low liquidity bonds) Present Value of Cash Flows Model Valued by using similar instrument prices plus a charge-off rate by liquidity. - Loans and account receivable at FVOCI Present Value of Cash Flows Model Measured by discounting estimated cash flow using the interest rate of new contracts. The Bank does not believe that any change in unobservable inputs with respect to level 3 instruments would result in a significantly different fair value measurement. The following table presents the assets and liabilities that are measured at fair value on a recurrent basis: Fair value measurement As of December 31, 2020 Level 1 Level 2 Level 3 MCh$ MCh$ MCh$ MCh$ Assets Financial assets held for trading 133,718 132,246 1,472 - Loans and accounts receivable at FVOCI, net 69,331 - - 69,331 Debt instruments at FVOCI 7,162,542 7,145,285 16,731 526 Derivatives 9,032,085 - 9,024,484 7,601 Guarantee deposits (margin accounts) 608,359 - 608,359 - Total 17,006,035 7,277,531 9,651,046 77,458 Liabilities Derivatives 9,018,660 - 9,015,900 2,760 Guarantees received (margin accounts) 624,205 - 624,205 - Total 9,642,865 - 9,640,105 2,760 Fair value measurement As of December 31, 2019 Level 1 Level 2 Level 3 MCh$ MCh$ MCh$ MCh$ Assets Financial assets held for trading 270,204 270,204 - - Loans and accounts receivable at FVOCI, net 66,065 - - 66,065 Debt instruments at FVOCI 4,010,272 3,992,421 17,146 705 Derivatives 8,148,608 - 8,133,700 14,908 Guarantee deposits (margin accounts) 314,616 - 314,616 - Total 12,809,765 4,262,625 8,465,462 81,678 Liabilities Derivatives 7,390,654 - 7,387,704 2,950 Guarantees received (margin accounts) 994,714 - 994,714 - Total 8,385,368 - 8,382,418 2,950 The following table presents assets or liabilities which are not measured at fair value in the statements of financial position but for which the fair value is disclosed: Fair value measurement As of December 31, 2020 Level 1 Level 2 Level 3 MCh$ MCh$ MCh$ MCh$ Assets Loans and accounts receivable at amortized cost, net 36,921,368 - - 36,921,368 Total 36,921,368 36,921,368 Liabilities Deposits and interbank borrowings 32,047,227 - 17,486,334 14,560,893 Issued debt instruments and other financial liabilities 9,590,678 - 9,590,678 - Total 41,637,905 - 27,077,012 14,560,893 Fair value measurement As of December 31, 2019 Level 1 Level 2 Level 3 MCh$ MCh$ MCh$ MCh$ Assets Loans and accounts receivable at amortized cost, net 34,602,793 - - 34,602,793 Total 34,602,793 - - 34,602,793 Liabilities Deposits and interbank borrowings 26,200,921 - 15,903,489 10,297,432 Issued debt instruments and other financial liabilities 10,718,997 - 10,718,997 - Total 36,919,918 - 26,622,486 10,297,432 The fair values of other assets and other liabilities approximate their carrying values. The methods and assumptions to estimate the fair value are defined below: - Loans and amounts due from credit institutions and from customers – Fair value are estimated for groups of loans with similar characteristics. The fair value was measured by discounting estimated cash flow using the interest rate of new contracts. That is, the future cash flow of the current loan portfolio is estimated using the contractual rates, and then the new loans spread over the risk-free interest rate are incorporated to the risk-free yield curve in order to calculate the loan portfolio fair value. In terms of behavior assumptions, it is important to underline that a prepayment rate is applied to the loan portfolio, thus a more realistic future cash flow is achieved. - Deposits and interbank borrowings – The fair value of deposits was calculated by discounting the difference between the cash flows on a contractual basis and current market rates for instruments with similar maturities. For variable-rate deposits, the carrying amount was considered to approximate fair value. - Issued debt instruments and other financial liabilities – The fair value of long-term loans was estimated by cash flow discounted at the interest rate offered on the market with similar terms and maturities. The valuation techniques used to estimate each level are defined in Note 1,k) There were no transfers between levels 1 and 2 for the year ended December 31, 2020 and 2019. The table below shows the effect, at December 31, 2019 and 2018, on the fair value of the main financial instruments classified as Level 3 of a reasonable change in the assumptions used in the valuation. This effect was determined by a sensitivity analysis under a 1bp scenario, detailed in the following table: As of December 31, 2020 Instrument Level 3 Valuation technique Main unobservable Impacts (in MCh$) Impacts (in MCh$) Derivatives Present Value method Curves on TAB (1) (1.3) (1.3) Debt instruments at FVOCI Internal rate of return method BR UF (2) - - As of December 31, 2019 Instrument Level 3 Valuation technique Main unobservable Impacts Impacts (in MCh$) Derivatives Present Value method Curves on TAB (1) (2.3) 2.3 Debt instruments at FVOCI Internal rate of return method BR UF (2) - - (1) TAB: “Tasa Activa Bancaria” (Active Bank Rate). Average interest rates on 30, 90, 180 and 360 day deposits published by the Chilean Association of Banks and Financial Institutions (ABIF) in nominal currency (Chilean peso) and in real terms, adjusted for inflation (in Chilean unit of account (Unidad de Fomento - UF)). (2) BR: “Bonos de Reconocimiento” (Recognition Bonds). The Recognition Bond is an instrument of money provided by the State of Chile to workers who joined the new pension system, which began operating since 1981. The following table presents the Bank’s activity for assets and liabilities measured at fair value on a recurrent basis using unobserved significant inputs (Level 3) as of December 31, 2020 and 2019: Assets Liabilities MCh$ MCh$ As of January 1, 2020 81,678 2,950 Total realized and unrealized profits (losses) Included in statements of income (196) 1,012 Included in other comprehensive income 3,087 - Purchases, issuances, and loans (net) - - Level transfer (7,111) (1,202) As of December 31, 2020 77,458 2,760 Total profits or losses included in comprehensive income for 2020 that are attributable to change in unrealized profit (losses) related to assets or liabilities as of December 31, 2019 (4,220) (190) Assets Liabilities MCh$ MCh$ As of January 1, 2019 80,781 795 Total realized and unrealized profits (losses) Included in statements of income 827 2,155 Included in other comprehensive income 70 - Purchases, issuances, and loans (net) - - Level transfer - - As of December 31, 2019 81,678 2,950 Total profits or losses included in comprehensive income for 2019 that are attributable to change in unrealized profit (losses) related to assets or liabilities as of December 31, 2018 897 2,155 The realized and unrealized profits (losses) included in comprehensive income for 2020 and 2019, in the assets and liabilities measured at fair value on a recurrent basis through unobservable market data (Level 3) are recorded in the Statements of Comprehensive Income. The potential effect as of December 31, 2020 and 2019 on the valuation of assets and liabilities valued at fair value on a recurrent basis through unobservable significant inputs (level 3), generated by changes in the principal assumptions if other reasonably possible assumptions that are less or more favorable were used, is not considered by the Bank to be significant. The following tables show the financial instruments subject to compensation in accordance with IAS 32, for 2020 and 2019: As of December 31, 2020 Linked financial instruments, compensated in balance Financial instruments Gross Compensated in Net amount Remains of unrelated Amount in Assets Ch$ Million Ch$ Million Ch$ Million Ch$ Million Financial derivative contracts (*) 8.840.436 - 8.840.436 191,649 9,032,085 Investments under resale agreements - - - Loans and accounts receivable at amortized cost, net - - - Loans and accounts receivable at FVOCI, net - - - 33,303,100 33,303,100 Total 8.840.436 - 8.840.436 33,494,749 42,335,185 Liabilities Financial derivative contracts (*) 8,922,079 - 8,922,079 96,581 9,018,660 Investments under resale agreements 969,808 - 969,808 - 969,808 Deposits and interbank borrowings - - - 31,471,283 31,471,283 Total 9,891,887 - 9,891,887 31,567,864 41,459,751 (*) Derivatives contract have guarantees associated for Ch$191,802 million and Ch$96,263, respectively. Linked financial instruments, compensated in balance Financial instruments Gross Compensated in Net amount Remains of unrelated Amount in Assets Ch$ Million Ch$ Million Ch$ Million Ch$ Million Financial derivative contracts 8,148,151 - 8,148,151 457 8,148,608 Investments under resale agreements - - Loans and accounts receivable at amortized cost, net - 31,775,420 31,775,420 Loans and accounts receivable at FVOCI, net 66,065 - 66,065 66,065 Total 8,214,216 - 8,148,151 31,841,942 39,990,093 Liabilities Financial derivative contracts 7,388,145 - 7,388,145 2,509 7,390,654 Investments under resale agreements 380,055 - 380,055 - 380,055 Deposits and interbank borrowings - - - 26,010,067 26,010,067 Total 7,768,200 - 7,768,200 26,012,576 33,780,776 The Bank, in order to reduce its credit exposure in its financial derivative operations, has entered into collateral contracts with its counterparties, in which it establishes the terms and conditions under which they operate. In terms collateral (received/delivered) operates when the net of the fair value of the financial instruments held exceed the thresholds defined in the respective contracts. As of December 31, 2020 As of December 31, 2019 Financial derivative contracts Assets Liability Assets Liability MCh$ MCh$ MCh$ MCh$ Financial derivative contracts with collateral agreement threshold equal to zero 8,127,263 7,900,539 7,478,837 6,748,219 Financial derivative contracts with non-zero threshold collateral agreement 471,529 606,661 532,298 517,814 Financial derivative contracts without collateral agreement 433,293 511,460 137,472 124,621 Total 9,302,085 9,018,660 8,148,607 7,390,654

Risk Management

Risk Management	12 Months Ended
	Dec. 31, 2020
Disclosure of financial risk management [text block] [Abstract]
RISK MANAGEMENT	RISK MANAGEMENT Introduction and general description The Bank, due to its activities with financial instruments is exposed to several types of risks. The main risks related to financial instruments that apply to the Bank are as follows: - Market risk: ● Foreign exchange risk: this arises as a consequence of exchange rate fluctuations among currencies. ● Interest rate risk: this arises as a consequence of fluctuations in market interest rates. ● Price risk: this arises as a consequence of changes in market prices, either due to factors specific to the instrument itself or due to factors that affect all the instruments negotiated in the market. ● Inflation risk: this arises as a consequence of changes in Chile’s inflation rate, whose effect would be mainly applicable to financial instruments denominated in UFs. - Credit risk - Liquidity risk - Operational risk: - Capital risk This note includes information on the Bank’s exposure to these risks and on its objectives, policies, and processes involved in their measurement and management. Risk management structure The Board is responsible for the establishment and monitoring of the Bank’s risk management structure, for which purpose it has an on-line corporate governance system which incorporates international recommendations and trends, adapted to Chilean regulatory conditions and given it the ability to apply the most advanced practices in the markets in which the Bank operates. The effectiveness with which we are able to manage the balance between risk and reward is a significant factor in our ability to generate long term, stable earnings growth. Toward that end, our Board and senior management places great emphasis on risk management. A. Integral Risk Committee The Integral Risk Committee of the Board is responsible for reviewing and monitoring all risks that may affect us, allowing for an integral risk management. This committee serves as the governing body through which the Board supervises risk in general. It also evaluates the reasonability of the systems for measurement and control of risks. ● Credit risk ● Market risk ● Operational risk ● Cybersecurity ● Solvency risk (BIS) ● Legal risks ● Compliance risks ● Reputational risks This Committee includes six Board members. This committee also includes the CEO, the Director of Risk and other senior level executives from the risk and commercial side of our business. B. Audit Committee The Audit Committee ( Comité de Directores y Auditoría C. Asset and Liability Committee The ALCO includes the Vice-President of the Board and three additional members of the Board, the Chief Executive Officer, the Chief Financial Officer, the Corporate Financial Controller, the Manager of the Financial Management Division, the Manager of Market Risk, the Manager of the Treasury Division, and other senior members of management. The ALCO meets monthly. All limits reviewed by the ALCO are measured and prepared by the Market Risk Department. The non-Board members of the ALCO meet weekly to review liquidity, funding, capital and market risk related matters. The main functions of the ALCO are: ● Making the most important decisions, approving the risk appetite and limits regarding our exposure to inflation, interest rate risk, funding, capital and liquidity levels. ● Review of the evolution of the most relevant local and international markets and monetary policies. D. Market Committee The Market Committee includes the Chairman of the Board, the Vice Chairman of the Board, two additional members of the Board, the Chief Executive Officer, the Director of Corporate Investment Banking, the Chief Financial Officer, the Manager of the Treasury Division, the Manager of the Financial Management Division, the Manager of Market Risk, the Financial Controller and other senior members of management. The Market Committee is responsible for: ● Establishing a strategy for the Bank’s trading investment portfolio. ● Establishing the Bank’s policies, procedures and limits with respect to its trading portfolio. The Bank’s Market Risk Department measures all risks and limits and reports these to the Market Committee. ● Reviewing the net foreign exchange exposure and limit. ● Reviewing the results of the Bank’s client treasury business. ● Reviewing the evolution of the most relevant local and international markets and monetary policies. E. Risk Department All issues regarding risk in the Bank are the responsibility of the Bank’s Risk Department. The Risk Department reports to the CEO but has full independence, and no risk decisions can be made without its approval. Market risk Market risk arises as a consequence of the market activity, by means of financial instruments whose value can be affected by market variations, reflected in different assets and financial risk factors. The risk can be diminished by means of hedging through other products (assets/liabilities or derivative instruments) or terminating the open transaction/position. The objective of market risk management is to manage and control market risk exposure within acceptable parameters. There are four major risk factors that affect the market prices: type of interest, type of exchange, price, and inflation. In addition and for certain positions, it is necessary to consider other risks as well, such as spread risk, base risk, commodity risk, volatility or correlation risk. Market risk management The Bank’s internal management measures market risk based mainly on the procedures and standards of Banco Santander Spain, which are in turn based on an analysis of three principal components: - trading portfolio - local financial management portfolio - foreign financial management portfolio The trading portfolio is comprised chiefly of investments valued at fair market value and free of any restriction on their immediate sale, which are often bought and sold by the Bank with the intention of selling them in the short term to benefit from short–term price fluctuations. The trading portfolio also includes the Bank’s exposure to foreign currency. The financial management portfolios include all the financial investments not considered to be part of trading portfolio. The main decisions that relate to market risk for the Bank and the limits regarding market risk are made in the Asset and Liability Committee and the Market Committee. The measurement and oversight of market risks is performed by the Market Risk Department. The Bank’s governance rules have established the existence of two high-level committees that, among other things, function to monitor and control market risks: the Asset and Liability Committee and the Market Committee. The Market Risk department’s functions in connection with trading portfolio include the following: i. applies the “Value at Risk” (VaR) techniques to measure interest rate risk, ii. adjust the trading portfolios to market and measure the daily income and loss from commercial activities, iii. compare the real VaR with the established limits, iv. establish procedures to prevent losses in excess of predetermined limits, and v. furnishes information on the trading activities to the ALCO, other members of the Bank’s management, and the Global Risk Department of Banco Santander Spain. The Market Risk department’s functions in connection with financial management portfolios include the following: i. performs sensitivity simulations (as explained below) to measure interest rate risk for activities denominated in local currency and the potential losses forecasted by these simulations. ii. provide daily reports thereon to the ALCO, other members of the Bank’s management, and the Global Risk Department of Banco Santander Spain. Market risk – management of trading portfolio The Bank applies VaR methodologies to measure the market risk of its trading portfolio. The Bank has a consolidated commercial position comprised of fixed–income investments and foreign currency trading. This portfolio is comprised mostly of Central Bank of Chile bonds, mortgage bonds, locally issued, low–risk corporate bonds and foreign currencies, mainly U.S. dollars. At the end of each year, the trading portfolio included no stock portfolio investments. For the Bank, the VaR estimate is made under the historical simulation methodology, which consists of observing the behavior of the profits and losses that would have occurred in the current portfolio if the market conditions for a given historical period had been in force, in order to infer the maximum loss on the basis of that information, with a given degree of confidence. The methodology has the advantage of precisely reflecting the historical distribution of the market variables and not requiring any assumptions regarding the distribution of specific probabilities. All the VaR measures are intended to determine the distribution function for a change in the value of a given portfolio, and once that distribution is known, to calculate the percentile related to the necessary degree of confidence, which will be equal to the value at risk by virtue of those parameters. As calculated by the Bank, the VaR is an estimate of the maximum expected loss of market value for a given portfolio over a 1–day horizon, with a 99.00% confidence level. It is the maximum 1–day loss that the Bank could expect to experience in a given portfolio, with a 99.00% confidence level. In other words, it is the loss that the Bank would expect to experience only 1.0% of the time. The VaR provides a single estimate of market risk which is not comparable from one market risk to another. Returns are calculated through the use of a 2–year time window or at least 520 data points obtained since the last reference date for calculation of the VaR going backward in time. We do not calculate three separate VaRs. We calculate a single VaR for the entire trading portfolio, which in addition is segregated by risk type. The VaR software performs a historical simulation and calculates a Profit and Loss Statement (P&L) for 520 data points (days) for each risk factor (fixed income, foreign currency and variable income.) The P&L of each risk factor is added together and a consolidated VaR is calculated with 520 points or days of data. At the same time a VaR is calculated for each risk factor based on the individual P&L calculated for each individual risk factor. Furthermore, a weighted VaR is calculated in the manner described above, but which gives a greater weighting to the 30 most recent data points. The larger of the two VaRs is the one that is reported. In 2020, 2019 and 2018, we used the same VaR model and there has been no change in methodology or assumptions for subsequent periods. The Bank uses the VaR estimates to provide a warning when the statistically estimated incurred losses in its trading portfolio would exceed prudent levels, and hence, there are certain predetermined limits. Limitations of the VaR model When applying a calculation methodology, no assumptions are made regarding the probability distribution of the changes in the risk factors; the historically observed changes are used for the risk factors on which each position in the portfolio will be valued. It is necessary to define a valuation function fj(xi) for each instrument, preferably the same one used to calculate the market value and income of the daily position, This valuation function will be applied in each scenario to generate simulated prices for all the instruments in each scenario. In addition, the VaR methodology should be interpreted taking into consideration the following limitations: - Changes in market rates and prices may not be independent and identically distributed random variables and may not have a normal distribution. In particular, the assumption of normal distribution may underestimate the probability of extreme market movements; - The historical data used by the Bank may not provide the best estimate of the joint distribution of changes in the risk factors in the future, and any modification of the data may be inadequate. In particular, the use of historical data may fail to capture the risk of potential extreme and adverse market fluctuations, regardless of the time period used; - A 1-day time horizon may not fully capture the market risk positions which cannot be liquidated or covered in a single day, It would not be possible to liquidate or cover all the positions in a single day; - The VaR is calculated at the close of business, but trading positions may change substantially in the course of the trading day; - The use of a 99% level of confidence does not take account of, or make any statement about, the losses that could occur outside of that degree of confidence; and - A model such as the VaR does not capture all the complex effects of the risk factors over the value of the positions or portfolios, and accordingly, it could underestimate potential losses, We perform back-testing daily and generally find that trading losses exceed our VaR estimate approximately one out of every 100 trading days. At the same time, we set a limit to the maximum VaR that we are willing to accept over our trading portfolio. Also, a maximum VaR limit was established that can be applied over the trading portfolio. The VaR as of December 31, 2020 was USD 2.62 million, below the total limit. High, low and average levels for each component for 2020 and 2019 were as follows: VaR 2020 USDMM 2019 USDMM Consolidated: High 12.82 15.78 Low 1.94 1.33 Average 4.45 3.06 Fixed-income investments: High 11.96 9.77 Low 1.50 1.18 Average 3.19 2.33 Variable-income investments High 0.01 - Low - 0.01 Average - - Foreign currency investments High 6.47 6.05 Low 0.71 0.10 Average 2.85 1.60 Market risk - local and foreign financial management The Bank’s financial management portfolio includes most of the Bank’s non-trading assets and liabilities, including the credit/loan portfolio. For these portfolios, investment and financing decisions are strongly influenced by the Bank’s commercial strategies. The Bank uses a sensitivity analysis to measure the market risk of local and foreign currencies (not included in the trading portfolio). The Bank performs a simulation of scenarios, which will be calculated as the difference between the present value of the flows in the chosen scenario (a curve with a parallel movement of 100 bps in all its segments) and their value in the base scenario (current market). All the inflation–indexed local currency (UF) positions are adjusted by a sensitivity factor of 0.57, which represents a 57 basis point change in the rate curve for the real rates and a 100 basis point change for the nominal rates. The same scenario is performed for the net foreign currency positions and the interest rates in U.S. dollars. The Bank has also established limits in regard to the maximum loss which these interest rate movements could impose on the capital and net financial income budgeted for the year. To establish the consolidated limit, we add the foreign currency limit to the domestic currency limit and multiple by 2 the sum of the multiplication of them together both for net financial loss limit as well as for the capital and reserves loss limit, using the following formula: Consolidated limit = square root of a2 + b2 + 2ab a: domestic currency limit b: foreign currency limit Since we assume the correlation is 0; 2ab = 0, 2ab = 0 Limitations of the sensitivity models The most important assumption is using an exchange rate of 100 bp based on yield curve (57 bp for real rates). The Bank uses a 100 bp exchange since sudden changes of this magnitude are considered realistic. Santander Spain Global Risk Department has also established comparable limits by country, to be able to compare, monitor and consolidate market risk by country in a realistic and orderly way. In addition, the sensitivity simulation methodology should be interpreted taking into consideration the following limitations: - The simulation of scenarios assumes that the volumes remain consistent in the Bank’s Consolidated Statements of Financial Position and are always renewed at maturity, thereby omitting the fact that certain credit risk and prepayment considerations may affect the maturity of certain positions. - This model assumes an identical change along the entire length of the yield curve and does not take into account the different movements for different maturities. - The model does not take into account the sensitivity of volumes which results from interest rate changes. - The limits to losses of budgeted financial income are calculated based on the financial income foreseen for the year, which may not be actually earned, meaning that the real percentage of financial income at risk may be higher than the expected one. Market risk – Financial management portfolio – December 31, 2020 and 2019 2020 2019 Effect on Effect on Effect on Effect on Financial management portfolio – local currency (MCh$) Loss limit 100,000 329,275 100,000 275,000 High 66,504 302,263 32,719 273,473 Low 26,492 214,596 12,686 145,338 Average 45,380 255,070 24,719 228,772 Financial management portfolio – foreign currency (Th$US) Loss limit 32 53 30 75 High 19 47 20 35 Low 2 12 5 1 Average 5 33 12 12 Financial management portfolio – consolidated (in MCh$) Loss limit 100,000 329,275 100,000 275,000 High 67,584 286,436 34,462 271,989 Low 25,111 210,706 15,236 143,836 Average 46,044 246,292 27,918 227,303 IBOR – reform In December 2020, the ICB Benchmark Administration Limited (IBA) published a consultation about its intention to stop publishing LIBOR rates in currencies other than USD since December 31, 2021, and all other LIBOR in USD since June 30, 2023. The Bank is working in a “transition program” focused mainly in: i. Identifying the risks associated with the transition and defining mitigation actions ii. Developing products referenced to the proposed replacement rates iii. Developing transition process, through the renegotiation of existing contracts referenced to LIBOR At December 31, 2020, the exposures of financial assets and liabilities impacted by the IBOR reform is presented below: Loans and Deposits Debt instruments Financial derivative Financial derivative (Liabilities) MCh$ MCh$ MCh$ MCh$ MCh$ 362,331 582,979 200,301 614,035 483,789 Credit risk Credit risk is the risk that one of the parties to a financial instrument fails to meet its contractual obligations for reasons of insolvency or inability of the individuals or legal entities in question to continue as a going concern, causing a financial loss to the other party. The Bank consolidates all elements and components of credit risk exposure to manage credit risk (i.e., individual delinquency risk, inherent risk of a business line or segment, and/or geographical risk). In Note 8, 9, 10 and Note 29, we present our net exposure to credit risk at December 31, 2020 and 2019. Credit Risk Governance The Risk Division, our credit analysis and risk management group, is largely independent of our business areas, Risk evaluation teams interact regularly with our clients. For larger transactions, risk teams in our headquarters work directly with clients when evaluating credit risks and preparing credit applications. Various credit approval committees, all of which include Risk Division and Commercial Division personnel, must verify that the appropriate qualitative and quantitative parameters are met by each applicant. Each committee’s powers are defined by our Board of Directors. The Bank’s governance rules have established the existence of the Integral Risk Committee. This committee is responsible for revising and following all risks that may affect us, including reputational risk, allowing for an integral risk management. This committee serves as the governing body through which the Board supervises all risk functions. It also evaluates the reasonability of the systems for measurement and control of risks. This Committee includes the Vice Chairman of the Board and five Board members. The Board has delegated the duty of credit risk management to the Integral Risk Committee, as well as to the Bank’s risk departments, whose roles are summarized below: ● Formulate credit policies by consulting with the business units, meeting requirements of guarantees, credit evaluation, risk rating and submitting reports, documentation and legal procedures in compliance with the regulatory, legal and internal requirements of the Bank. Establish the structure to approve and renew credit requests. The Bank structures credit risks by assigning limits to the concentration of credit risk in terms of individual debtor, debtor group, industry segment and country. Approval levels are assigned to the corresponding officials of the business unit (commercial, consumer, SMEs) to be exercised by that level of management. In addition, those limits are continually revised. Teams in charge of risk evaluation at the branch level interact on a regular basis with customers; however, for larger credit requests, the risk team from the head office and the Executive Risk Committee works directly with customers to assess credit risks and prepare risk requests. ● Limit concentrations of exposure to customers or counterparties in geographic areas or industries (for accounts receivable or loans), and by issuer, credit rating and liquidity. ● Develop and maintain the Bank’s credit risk classifications for the purpose of classifying risks according to the degree of exposure to financial loss that is exhibited by the respective financial instruments, with the aim of focusing risk management specifically on the associated risks. ● Revise and evaluate credit risk. Management’s risk divisions are largely independent of the Bank’s commercial division and evaluate all credit risks in excess of the specified limits prior to loan approvals for customers or prior to the acquisition of specific investments. Credit renewal and reviews are subject to similar processes. The following diagram illustrates the governance of our credit risk division including the committees with approval power: Role of Santander Spain’s Global Risk Department: Credit Risk In matters regarding Credit Risk, Santander Spain’s Global Risk Department has the following role: ● All credit risks greater than MCh$63,500 (or U.S.$89.1 million), after being approved locally, are reviewed by Santander Spain. This additional review ensures that no global exposure limit is being breached. ● In standardized risks, the consumer and mortgage scoring models are developed locally. Its approval instance will depend on the relative importance of the models (“Tier” of the model); in this way, if the model is of the greatest importance, it is approved in risk committees of the Headquarters (Spain); otherwise, it is approved locally. ● For each scoring model, a quarterly Risk Report is prepared, which is reviewed locally and is also sent to Santander Analytics (Santander Spain). This report indicates the stability of the model and its level of predictability. Credit Approval: Loans approved on an individual basis In preparing a credit proposal for a corporate client whose loans are approved on an individual basis, Santander-Chile’s personnel verifies such parameters as debt servicing capacity (typically including projected cash flows), the company’s financial history and projections for the economic sector in which it operates. The Risk Division is closely involved in this process and prepares the credit application for the client. All proposals contain an analysis of the client, a rating and a recommendation. Credit limits are determined not on the basis of outstanding balances of individual clients, but on the direct and indirect credit risk of entire financial groups. For example, a corporation will be evaluated together with its subsidiaries and affiliates. Credit Approval: Loans approved on a group basis The majority of loans to individuals and small and mid-sized companies are approved by the Standardized Risk Area through an automated credit scoring system. This system is decentralized, automated and based on multiple parameters, including demographic and information regarding credit behavior from external sources and the FMC. Impairment assessment (policy applicable from January 1, 2018) In accordance with the requirements of IFRS 9 the Bank has developed a new credit risk model, applicable from January 1, 2018. a. Definition of default and cure The Bank considers a financial instrument defaulted and therefore Stage 3 for ECL calculations in all cases when the borrower becomes 90 days past due on its contractual payments. As a part of a qualitative assessment of whether a customer is in default, the Bank also considers a variety of instances that may indicate unlikeliness to pay. Such events include: ● Internal rating of the borrower indicating default or near default ● The borrower requesting emergency funding from the Bank ● The borrower having past due liabilities to public creditors or employees ● The borrower is deceased ● A material decreases in the underlying collateral value where the recovery of the loan is expected from the sale of the collateral ● A material decreases in the borrower’s turnover or the loss of a major customer ● A covenant breach not waived by the Bank ● The debtor (or any legal entity within the debtor’s group) filing for bankruptcy application/protection ● Debtor’s listed debt or equity suspended at the primary exchange because of rumors or facts about financial difficulties It is the Bank’s policy to consider a financial instrument as ‘cured’ and therefore re-classified out of Stage 3 when none of the default criteria have been present for at least twelve consecutive months (and 24 months for special vigilance operations). The decision whether to classify an asset as Stage 2 or Stage 1 once cured depends on the updated credit grade, at the time of the cure, and whether this indicates there has been a significant increase in credit risk compared to initial recognition. b. Internal rating and PD estimation The Bank’s Credit Risk Department operates its internal rating models. The models incorporate both qualitative and quantitative information and, in addition to information specific to the borrower utilize supplemental external information that could affect the borrower’s behavior. The internal credit grades are assigned based on the internal scoring policy, PDs are then adjusted for IFRS 9 ECL calculations to incorporate forward looking information and the IFRS 9 Stage classification of the exposure. The following table shows quality assets and its related provision, based on our internal scoring policy as of December 31, 2020 and 2019: December 31, 2020 Individually assessed Commercial Portfolio Stage 1 Stage 2 Stage 3 Total Individual Percentage Stage 1 Stage 2 Stage 3 Total ECL Percentage MCh$ MCh$ MCh$ MCh$ % MCh$ MCh$ MCh$ MCh$ % A1 45,862 - - 45,862 0.13% 3 - - 3 0.00% A2 1,095,506 3,265 - 1,098,771 3.20% 900 54 - 954 0.09% A3 1,863,480 19,658 - 1,883,138 5.48% 3,318 339 - 3,657 0.35% A4 2,632,793 42,529 - 2,675,322 7.79% 7,329 606 - 7,935 0.77% A5 2,538,748 164,341 232 2,703,321 7.87% 11,498 4,618 78 16,194 1.56% A6 1,588,410 289,460 53 1,877,923 5.47% 16,541 14,010 53 30,604 2.95% B1 - 715,348 - 715,348 2.08% - 25,679 - 25,679 2.48% B2 - 161,239 233 161,472 0.47% - 9,566 138 9,704 0.94% B3 - 65,684 695 66,379 0.19% - 3,764 434 4,198 0.40% B4 - 73,248 49,430 122,678 0.36% - 3,008 21,014 24,022 2.32% C1 - 29,863 138,171 168,034 0.49% - 2,201 48,365 50,566 4.88% C2 - 12,282 69,491 81,773 0.24% - 926 27,021 27,947 2.70% C3 - 1,550 55,378 56,928 0.17% - 86 15,603 15,689 1.51% C4 - 2,227 48,177 50,404 0.15% - 143 21,038 21,181 2.04% C5 - 3,981 36,822 40,803 0.12% - 267 20,397 20,664 1.99% C6 - 5,040 131,384 136,424 0.40% - 185 107,364 107,549 10.37% Subtotal 9,764,799 1,589,715 530,066 11,884,580 34.61% 39,589 65,452 261,505 366,546 35.35% Collectively assessed Stage 1 Stage 2 Stage 3 Total Group Percentage Stage 1 Stage 2 Stage 3 Total ECL Percentage MCh$ MCh$ MCh$ MCh$ % MCh$ MCh$ MCh$ MCh$ % Commercial 4,493,999 228,591 380,019 5,102,609 14.86% 40,943 44,315 193,268 278,526 26.86% Mortgage 11,518,363 392,372 501,090 12,411,825 36.14% 25,065 8,441 79,016 112,522 10.85% Consumer 4,439,163 236,595 265,121 4,940,879 14.39% 88,825 31,732 158,642 279,199 26.93% Subtotal 20,451,525 857,558 1,146,230 22,455,313 65.39% 154,833 84,488 430,926 670,247 64.65% Total 30,216,324 2,447,273 1,676,296 34,339,893 100.00% 194,422 149,940 692,431 1,036,793 100.00% December 31, 2019 Individually assessed Commercial Stage 1 Stage 2 Stage 3 Total Individual Percentage Stage 1 Stage 2 Stage 3 Total ECL Percentage MCh$ MCh$ MCh$ MCh$ % MCh$ MCh$ MCh$ MCh$ % A1 99,042 - - 99,042 0.30% 2 - 2 0.00% A2 907,659 37 - 907,696 2.78% 443 - 443 0.05% A3 2,418,990 61 - 2,419,051 7.41% 2,617 - 2,617 0.29% A4 3,262,671 7,184 - 3,269,855 10.01% 4,399 22 4,421 0.49% A5 2,188,717 22,163 - 2,210,880 6.77% 7,618 515 8,133 0.91% A6 1,086,401 47,157 487 1,134,045 3.47% 6,461 1,410 208 8,079 0.90% B1 - 603,201 - 603,201 1.85% - 12,641 - 12,641 1.41% B2 - 82,781 560 83,341 0.26% - 3,773 205 3,978 0.44% B3 - 85,034 817 85,851 0.26% - 3,367 261 3,628 0.40% B4 - 83,039 50,662 133,701 0.41% - 4,085 21,910 25,995 2.90% C1 - 45,433 113,004 158,437 0.48% - 3,516 50,440 53,956 6.02% C2 - 8,865 66,965 75,830 0.23% - 614 28,504 29,118 3.25% C3 - 15,762 32,839 48,601 0.15% - 221 11,281 11,502 1.28% C4 - 2,405 38,967 41,372 0.13% - 170 20,039 20,209 2.26% C5 - 847 44,057 44,904 0.14% - 43 27,586 27,629 3.08% C6 - 998 52,649 53,647 0.16% - 12 35,732 35,744 3.99% Subtotal 9,963,480 1,004,967 401,007 11,369,454 34.80% 21,540 30,389 196,166 248,095 27.69% Collectively assessed Stage 1 Stage 2 Stage 3 Total Group Percentage Stage 1 Stage 2 Stage 3 Total ECL Allowance Percentage MCh$ MCh$ MCh$ MCh$ % MCh$ MCh$ MCh$ MCh$ % Commercial 3,839,143 240,100 413,628 4,492,871 13.75% 35,887 25,555 197,032 258,474 28.84% Mortgage 10,275,966 457,948 529,081 11,262,995 34.47% 8,446 14,509 78,104 101,059 11.28% Consumer 4,963,047 292,718 290,430 5,546,195 16.98% 67,396 50,808 170,263 288,467 32.19% Subtotal 19,078,156 990,766 1,233,139 21,302,061 65.20% 111,729 90,872 445,399 648,000 72.31% Total 29,041,636 1,995,733 1,634,146 32,671,515 100.00% 133,269 121,261 641,565 896,095 100.00% In relation to the credit quality of the investment portfolio, local regulations specify that banks are able to hold only local and foreign fixed–income securities except in certain cases. Additionally, Banco Santander-Chile has internal policies to ensure that only securities approved by the Market Risk department, which are stated in the documents “APS” – Products and underlying Approval, are acquired. The Credit Risk Department sets the exposure limits to those approved APS’s. The APS is updated on daily basis. As of December 31, 2019, 99% our total investment portfolio corresponds to securities issued by the Chilean Central Bank and US treasury notes. c. Exposure at default The exposure at default (EAD) represents the gross carrying amount of the financial instruments subject to the impairment calculation, addressing both the client’s ability to increase its exposure while approaching default and potential early repayments too. To calculate the EAD for a Stage 1 loan, the Bank assesses the possible default events within 12 months for the calculation of the 12mECL. However, if a Stage 1 loan that is expected to default in the 12 months from the balance sheet date and is also expected to cure and subsequently default again, then all linked default events are taken into account. For Stage 2, Stage 3 the exposure at default is considered for events over the lifetime of the instruments. d. Loss given default The credit risk assessment is based on a standardized LGD assessment framework that results in a certain LGD rate. These LGD rates take into account the expected EAD in comparison to the amount expected to be recovered or realized from any collateral held. The Bank segments its retail lending products into smaller homogeneous portfolios (evaluated collective), based on key characteristics that are relevant to the estimation of future cash flows. The applied data is based on historically collected loss data and involves a wider set of transaction characteristics (i.e., product type, wider range of collateral types) as well as borrower characteristics. Further recent data and forward-looking economic scenarios are used in order to determine the IFRS 9 LGD rate for each group of financial instruments. Under IFRS 9, LGD rates are estimated for the Stage 1, Stage 2, Stage 3 IFRS 9 segment of each asset class. The inputs for these LG

Non Current Assets Held for Sal

Non Current Assets Held for Sale	12 Months Ended
	Dec. 31, 2020
Non Current Assets Held For Sale [Abstract]
NON CURRENT ASSETS HELD FOR SALE	NON CURRENT ASSETS HELD FOR SALE Banco Santander has decided to implement its own acquiring network, and therefore the Bank is in process of disposing of the investment in those companies. Accordingly, the Bank management is engaged in a search plan for buyers. In accordance with the requirements of IFRS 5, the Bank has presented as non-current assets classified as held for sale those investments, isolating them from the investments in associates, in the same way it has presented the income associated with such investments as non-current results. In accordance with facts and circumstances arising from the social unrest in Chile and the global pandemic due to COVID-19 (situations beyond the Bank’s control), the process of selling its share participation has taken more than one year. If, however, the Bank continues committed to its selling plan and its acquiring network development plan, as evidenced by the recent creation of a payment card operating company and the active search for potential buyers. As of December 31, 2020, the Bank has sold its participation in Nexus. The following investments in associates were classified to Other assets as assets held for sale: As of December 31, 2020 2019 Participation Assets Income Assets Income % MCh$ MCh$ MCh$ MCh$ Transbank 25.00 19,093 - 19,093 1,442 Nexus - - - 357 136 Redbanc 33.43 2,943 - 2,943 121 Total 22.036 - 22,393 1,699

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2020
Disclosure Of Nonadjusting Events After Reporting Period Abstract
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS On January 7, 2021, at the Extraordinary Shareholders’ Meeting of the “Sociedad Operadora de Tarjetas de Pago Santander Getnet Chile S.A.” the members agreed to pay total subscribed and unpaid capital. Accordingly, “Santander Asesorías Financieras Limitada” should pay MCh$0,8 in cash and Banco Santander should pay MCh$37 in cash plus assets whose appraisal determined by the Board were MCh$3,689, thus the shareholders has paying 100% of capital of the company. On January 29, 2021, the Board of FMC in the Ordinary Session N°220 – through Resolution Exempt N°704 – authorize the operation “Sociedad Operadora de Tarjetas de Pago Santander Getnet Chile S.A.” as a banking support company and its registration in the Payment Card Operator Registry, under code 876. The Central Bank of Chile announced on January 27, 2021, a third stage of this financing mechanism called FCIC3. FCIC 3 will come into effect on March 1, 2021 and there will be an access limit per bank of US$ 2 billion. This new stage is focused on: (i) finalizing the committed execution of this monetary policy instrument, and (ii) deepening and extending the Government's guarantee loan programs (FOGAPE) considering the prolongation of the health emergency and the need to support the reactivation process. The Fogape-Reactiva program is a new economic support measure that includes government guaranteed financing for working capital, investment and refinancing for individuals, small and large-sized companies and it will be in force until December 31, 2021. No other subsequent events that need to be disclosed occurred between January 1, 2021 and the date of issuance of these Consolidated Financial Statements (February 26, 2021).

Accounting Policies, by Policy

Accounting Policies, by Policy (Policies)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Basis of preparation	a) Basis of preparation These Consolidated Financial Statements have been prepared in accordance with International Financial Reporting Standards (IFRS) as issued by the International Accounting Standards Board (IASB) (hereinafter referred to as IFRS). For purposes of these financial statements we use certain terms and conventions. References to “US$”, “U.S. dollars” and “dollars” are to United States dollars, references to “EUR” are to European Economic Community Euro, references to “CNY” are to Chinese Yuan, reference to “JPY” are to Japanese Yuan, references to “CHF” are to Swiss franc, references to “Chilean pesos”, “pesos” or “Ch$” are to Chilean pesos, and references to “UF” are to Unidades de Fomento. The UF is an inflation-indexed Chilean monetary unit with a value in Chilean pesos that changes daily to reflect changes in the official Consumer Price Index (“CPI”) of the Instituto Nacional de Estadísticas (the Chilean National Institute of Statistics) for the previous month. The UF is revalued in monthly cycles. Each day in the period beginning on the tenth day of the current month through the ninth day of the succeeding month, the nominal peso value of the UF is indexed up (or down in the event of deflation) in order to reflect a proportionate amount of the change in the Chilean Consumer Price Index during the prior calendar month. One UF is equaled to Ch$29,070.33 as of December 31, 2020 and Ch$28,309.94 as of December 31, 2019. In 2020, UF inflation was 2.7% The Notes to the Consolidated Financial Statements contain additional information to support the figures submitted in the Consolidated Statements of Financial Position, Consolidated Statements of Income, Consolidated Statements of Comprehensive Income, Consolidated Statements of Changes in Equity and Consolidated Statements of Cash Flows for the period.
Basis of preparation for the Consolidated Financial Statements	b) Basis of preparation for the Consolidated Financial Statements The Consolidated Financial Statements for the years ended December 31, 2020, 2019 and 2018, incorporate the financial statements of the entities over which the Bank has control (including structured entities); and includes the adjustments, reclassifications and eliminations needed to comply with the accounting and valuation criteria established by IFRS. Control is achieved when the Bank: I. has power over the investee; II. is exposed, or has rights, to variable returns from its involvement with the investee; and III. has the ability to use its power to affect its returns. The Bank reassesses whether or not it controls an investee if facts and circumstances indicate that there are changes to one or more of the three elements of control listed above. When the Bank has less than a majority of the voting rights of an investee, it has power over the investee when the voting rights are sufficient to give it the practical ability to direct the relevant activities over the investee unilaterally. The Bank considers all relevant facts and circumstances in assessing whether or not the Bank’s voting rights in an investee are sufficient to give it power, including: ● the size of the Bank’s holding of voting rights relative to the size and dispersion of holdings of the other vote holders; ● potential voting rights held by the Bank, other vote holders or other parties; ● rights arising from other agreements; and ● any additional facts and circumstances that indicate that the Bank has, or does not have, the current ability to direct the relevant activities at the time that decisions need to be made, including voting patterns at previous shareholders’ meetings. Consolidation of a subsidiary begins when the Bank obtains control over the subsidiary and ceases when the Bank loses control over the subsidiary. Specifically, income and expenses of a subsidiary acquired or disposed of during the year are included in the Consolidated Statements of Income and Comprehensive Income from the date the Bank gains control until the date when the Bank ceases to control the subsidiary. Profit or loss and each component of other comprehensive income are attributed to the owners of the Bank and to the non-controlling interests. Total comprehensive income of subsidiaries is attributed to the owners of the Bank and to the non-controlling interests even if this results in the non-controlling interests having a deficit in certain circumstances. When necessary, adjustments are made to the financial statements of the subsidiaries to ensure their accounting policies are consistent with the Bank’s accounting policies. All intragroup assets, liabilities, equity, income, expenses and cash flows relating to transactions between consolidated entities are eliminated in full on consolidation. Changes in the consolidated entities ownership interests in subsidiaries that do not result in a loss of control over the subsidiaries are accounted for as equity transactions. The carrying values of the Bank’s equity and the non-controlling interests’ equity are adjusted to reflect the changes to their relative interests in the subsidiaries. Any difference between the amount by which the non-controlling interests are adjusted and the fair value of the consideration paid or received is recognized directly in equity and attributed to owners of the Bank. In addition, third parties’ shares in the Bank’s consolidated equity are presented as “Non-controlling interests” in the Consolidated Statements of Changes in Equity. Their share in the income for the year is presented as “Attributable to non-controlling interest” in the Consolidated Statements of Income. The following companies are considered entities controlled by the Bank and are therefore within the scope of consolidation: i. Entities controlled by the Bank through participation in equity Name of the Subsidiary Percent ownership share As of December 31, Place of Incorporation and operation 2020 2019 2018 Direct Indirect Total Direct Indirect Total Direct Indirect Total Main Activity % % % % % % % % % Santander Corredora de Seguros Limitada Insurance brokerage Santiago, Chile 99.75 0.01 99.76 99.75 0.01 99.76 99.75 0.01 99.76 Santander Corredores de Bolsa Limitada Financial instruments brokerage Santiago, Chile 50.59 0.41 51.00 50.59 0.41 51.00 50.59 0.41 51.00 Santander Asesorias Financieras Limitada (1) Securities brokerage Santiago, Chile 99.03 - 99.03 99.03 - 99.03 99.03 - 99.03 Santander S.A. Sociedad Securitizadora Purchase of credits and issuance of debt instruments Santiago, Chile 99.64 - 99.64 99.64 - 99.64 99.64 - 99.64 Klare Corredora de Seguros S.A. (2) Insurance brokerage Santiago, Chile 50.10 - 50.10 50.10 - 50.10 - - - Santander Consumer Chile S.A. (3) Financing Santiago, Chile 51.00 - 51.00 51.00 - 51.00 - - - Sociedad operadora de Tarjetas de Pago Santander Getnet Chile S.A. (4) Card operator Santiago, Chile 99.99 0.01 100.00 - - - - - - The detail of non-controlling participation on all the remaining subsidiaries can be seen in Note 24– Non-controlling interest. (1) On December 18, 2019, Santander Agente de Valores Limitada changed its business name and the company’s object, to Santander Asesorías Financieras Limitada, and offering financial advice. (2) On October 19, 2019 Klare Corredora de Seguros S.A. was created as a digital insurance brokerage and supporting banking business company and thus is subject to banking regulations. The Banks owns the 50,10% of the company’s capital share. (3) On November 15, 2019, Financial Market Commission (FMC) authorized Banco Santander to acquire the 51% of the Santander Consumer Chile S.A. capital share from SK Berge (49%) and Banco Santander S.A. (2%). The sale was completed on November 27, 2019. (4) On July 6, 2020, Banco Santander registered as a new subsidiary and business support company named “Sociedad Operadora de Tarjeta de Pago Santander Getnet Chile S.A”. Entities controlled by the Bank through other considerations The following companies have been consolidated based on the determination that the Bank has control as previously defined above and in accordance with IFRS 10, Consolidated Financial Statements: - Santander Gestión de Recaudación y Cobranza Limitada (collection services) - Bansa Santander S.A. (financing revolving inventory lines to automotive dealers) (1) - Multiplica SpA (Development card incentive programs) (2) (1) Since December 2019, Bansa Santander S.A.(“Bansa”) modified it activity to financing revolving inventory lines to automotive dealers. Accordingly, Consumer has started to guide relevant activities of Bansa, and therefore it has begun to consolidate. (2) On October 4, 2019 Multiplica Spa was created as a supporting banking business company. In accordance with IFRS 10 Consolidated Financial Statement, the Bank controls the entity, since the relevant activities are addressed by the Bank, and the Bank is exposed, or has rights, to variable returns from its involvement with the investee. iii. Associates An associate is an entity over which the Bank has significant influence. Significant influence, in this case, is defined as the power to participate in the financial and operating policy decisions of the investee but is not control or joint control over those policies. An investment in an associate is accounted for using the equity method from the date on which the investee becomes an associate. The following companies are considered “Associates” in which the Bank accounts for its participation using the equity method: Percentage of ownership share As of December 31, Place of 2020 2019 2018 Associates Main activity Incorporation and % % % operation Redbanc S.A. (*) ATM services Santiago, Chile - - 33.43 Transbank S.A. (*) Debit and credit card services Santiago, Chile - - 25.00 Centro de Compensación Automatizado Electronic fund transfer and compensation services Santiago, Chile 33.33 33.33 33.33 Sociedad Interbancaria de Depósito de Valores S.A. Delivery of securities on public offer Santiago, Chile 29.29 29.29 29.29 Cámara Compensación de Alto Valor S.A. Payments clearing Santiago, Chile 15.00 15.00 15.00 Administrador Financiero del Transantiago S.A. Administration of boarding passes to public transportation Santiago, Chile 20.00 20.00 20.00 Sociedad Nexus S.A. (*) Credit card processor Santiago, Chile - - 12.90 Servicios de Infraestructura de Mercado OTC S.A. Administration of the infrastructure for the financial market of derivative instruments Santiago, Chile 12.48 12.48 12.48 (*) The Bank is in process to sell its share participation on Redbanc S.A. and Transbank S.A. therefore it has been classified in accordance to IFRS 5 “Non-current Assets Held for Sale and Discontinued Operations” as investment available for sale. Otherwise its share participation in Nexus S.A., has been sold. See Note N°38. In the case of Cámara Compensación de Pagos Alto Valor S.A., Banco Santander-Chile has a representative on the Board of Directors. As per the definition of associates, the Bank has concluded that it exerts significant influence over those entities. In the case of Servicios de Infraestructura de Mercado OTC S.A.The Bank participates, through its executives, actively in the administration and in the process of organization, which is why the Administration has concluded that it exerts significant influence on it.
Non-controlling interest	c) Non-controlling interest Non-controlling interest represents the portion of net income and net assets which the Bank does not own, either directly or indirectly. It is presented as “Attributable to non-controlling interest” separately in the Consolidated Statements of Income, and separately from shareholders’ equity in the Consolidated Statements of Financial Position. In the case of entities controlled by the Bank through other considerations, income and equity are presented in full as non-controlling interest, since the Bank controls them, but does not have any ownership expressed as a percentage.
Reporting segments	d) Reporting segments Operating segments are components of an entity: i. that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses from transactions with other components of the same entity); ii. whose operating results are regularly reviewed by the entity’s chief executive officer, who makes decisions about resources allocated to the segment and assess its performance; and iii. for which discrete financial information is available. Two or more segments can be combined only if aggregation is consistent with International Financial Reporting Standard 8 “Operating Segments” (IFRS 8) and the segments have similar economic characteristics and are similar in each of the following respects: i. the nature of the products and services; ii. the nature of the production processes; iii. the type or class of customers that use their products and services; iv. the methods used to distribute their products or services; and v. if applicable, the nature of the regulatory environment, for example, banking, insurance, or public utilities. The Bank reports separately on each operating segment that exceeds any of the following quantitative thresholds: i. its reported revenue, from both external customers and intersegment sales or transfers, is 10% or more of the combined internal and external revenue of all the operating segments. ii. the absolute amount of its reported profit or loss is 10% or more of the greater in absolute amount of: (i) the combined reported profit of all the operating segments that did not report a loss; (ii) the combined reported loss of all the operating segments that reported a loss. iii. its assets represent 10% or more of the combined assets of all the operating segments. Operating segments that do not meet any of the quantitative threshold may be treated as segments to be reported, in which case the information must be disclosed separately if management believes it could be useful for the users of the Consolidated Financial Statements. Information about other business activities of the operating segments not separately reported is combined and disclosed in the “Other segments” category.
Functional and presentation currency	e) Functional and presentation currency According to International Accounting Standard (IAS) 21 “The Effects of Changes in Foreign Exchange Rates”, the Chilean peso, which is the currency of the primary economic environment in which the Bank operates and the currency which influences its costs and revenue structure, has been defined as the Bank’s functional and presentation currency. Accordingly, all balances and transactions denominated in currencies other than the Chilean Peso are treated as “foreign currency”. The Bank maintains its accounting records and prepares its financial statements in Chilean pesos.
Foreign currency transactions	f) Foreign currency transactions The Bank performs transactions in foreign currencies, mainly in U.S. dollar. Assets and liabilities denominated in foreign currencies, held by the Bank and its subsidiaries are translated to Chilean pesos at the representative market exchange rate of the month for the reported period; the rate used was Ch$712.47 as of December 31, 2020 (Ch$747.37 per US$1 as of December 31, 2019). The amounts of net foreign exchange gains and losses includes recognition of the effects that exchange rate variations have on assets and liabilities denominated in foreign currencies and the profits and losses on foreign exchange spot and forward transactions undertaken by the Bank.
Classification and measurement of financial instrument – under IFRS 9 (from January 1, 2018)	g) Classification and measurement of financial instrument – under IFRS 9 (from January 1, 2018) Financial instruments must be classified and measured in accordance with IFRS 9 starting from January 1, 2018, which established guidance for the financial reporting of financial assets and financial liabilities that will present relevant and useful information to users of financial statements for their assessment of the amounts, timing and uncertainty of an entity’s future cash flows. I. Classification of financial instrument i) Classification of financial assets Financial assets are classified into a measurement category based on both the Bank’s business model for managing the financial asset and the contractual cash flow characteristics of the financial asset. Contractual cash flow assessment determines if the cash flows from the financial asset meet the SPPI (solely payment of principal and interest) criterion, i.e., whether the contractual terms of the financial asset give rise, on specific dates, to cash flows that are solely payments of principal and interest. Principal is the fair value of the financial assets at initial recognition, and interest is the consideration for the time value of money, the credit risk associated with the principal outstanding, and also may include liquidity risk, administrative cost and profit margin. For classification process the Bank perform the SPPI test, which assesses the contractual term to identify whether they meet SPI criterion, i.e., the contract is a basic lending arrangement. The Bank applies judgement and considers relevant factors such as currency in which the financial asset is denominated, and period for which the interest rate is set. Business model refers to how the Bank manages its financial assets in order to generate cash flows. The Bank determined its business model on initial application of IFRS 9 at the level that best reflects how it manages groups of financial assets to achieve its business objective. The Banks’s business model is not assessed on an instrument-by- instrument basis, but at a higher level of aggregated portfolio and is based on observable factors such as: performance of the financial assets, the risk that affect the performance, and the expected frequency, value and timing of sales. In accordance with IFRS 9 the business models are: ● Held to collect business model (HTC) - financial assets that are held within a business model whose objective is to hold assets in order to collect contractual cash flows are managed to realize cash flows by collecting contractual payments over the life of the instrument, under this business model sales made when there is an increase in the credit risk, or to manage credit concentration risk are not inconsistent with a business model whose objective is to hold financial assets to collect contractual cash flows. ● Held to collect and sell (HTC&S) - financial assets under this business model achieve the objective by both collecting contractual cash flows and selling financial assets, then involve a greater frequency and value of sales than HTC business model. ● Other business model - financial assets held in this business has the objective of realizing cash flows through the sale of the assets. The Bank makes decisions based on the assets’ fair values and manages the assets to realize those fair values. ii) Classification of financial liabilities The Bank classified all financial liabilities as subsequently measured at amortized cost, except for derivatives that are liabilities, which are measured at fair value through profit or loss. iii) Reclassification Reclassification of financial assets is required if, and only if, the objective of the Bank’s business model for managing those financial assets changes. Financial liabilities cannot be reclassified. II. Measurement of financial instruments i) Initial measurement On initial recognition, financial assets and financial liabilities are measured at the transaction price, i.e. the fair value of the consideration given or received (IFRS 13). In the case of financial instruments not at fair value through profit or loss, transaction costs are directly attributable to the acquisition or issue of the financial asset or financial liability. ii) Subsequent measurement- financial assets After initial recognition, the Bank shall measure a financial asset at: (a) Amortized cost Financial assets that are held in a business model to collect the contractual cash flows and contain contractual terms that give rise on specific dates to cash flows that are SPPI, are measured at amortized cost. The effective interest method is used in the calculation of the amortized cost of a financial asset or a financial liability and in the allocation and recognition of the interest revenue or interest expense in profit or loss over the relevant period. The effective interest rate (EIR) is the rate that exactly discounts estimated future cash payments or receipts through the expected life of the financial asset or financial liability to the gross carrying amount of a financial asset or to the amortized cost of a financial liability. (b) Fair value through other comprehensive income (FVOCI) Financial assets that are debt instruments held in a business model that is achieved by both collecting contractual cash flows and selling, and that contain contractual terms that give rise on specific dates to cash flows that are SPPI, are measured at FVOCI. They are subsequently remeasured at fair value and changes therein (except for those relating to impairment, interest income and foreign currency exchange gains and losses) are recognized in other comprehensive income, until the assets are sold. Upon disposal, the cumulative gain and losses in OCI are recognized in the income statements. (c) Fair value through profit or loss (FVTPL) Financial assets that do not contain contractual terms that give rise on specified dates to cash flows that are SPPI, or if the financial assets, or if the financial asset is not held in a business model that is either (i) a business model to collect the contractual cash flows or (ii) a business model that is achieved by both collecting contractual cash flows and selling. Financial assets held for trading are recognized at fair value through profit or loss, likewise derivatives contracts for trading purposes. (d) Equity instruments For certain equity instruments, the Bank may make an irrevocable election to present subsequent changes in the fair value of the instrument in other comprehensive income, except for dividend income which is recognized in profit or loss. Gains or losses on derecognition of these equity instruments are not transferred to profit or loss. iii) Subsequent measurement- financial liabilities After initial recognition, the Bank shall measure a financial liability at amortized cost. III. Derecognition of financial assets and liabilities Financial assets are derecognized when, and only when: ● the contractual rights to the cash flows from the financial asset expire, or ● the Bank transfers substantially all the risks and rewards of ownership of the financial asset, and therefore the Bank derecognizes the financial asset and recognize separately any rights and obligations created or retained in the transfer. In some cases, the Bank enters into transactions for which it retains the contractual rights to receive the cash flows of the financial asset, but assumes a contractual obligation to pay the cash flows in an arrangement that meets all the conditions required, i.e. the Bank only transfers collected amounts from original assets, selling or pledging original assets is prohibited, and the Bank has the obligation to remit cash flows collected without material delay. When a financial asset is sold and the Bank simultaneously agrees to repurchase it (or an asset that is substantially the same) at a fixed price on a future date, the Bank continues to recognize the financial assets in their entirety in the statements of financial position because it retains substantially all of the risks and rewards of ownership. The cash consideration received is recognized as a financial asset and a financial liability is recognized for the obligation to pay the repurchase price. Financial liabilities are derecognized when, and only when, they are extinguished, cancelled or expired. IV. Contingent loan The Bank issues contingent liabilities (including letters of credit, foreign letters of credit and performance guarantee) and loan commitments. Contingent liabilities and undrawn loan commitments are commitments under which, over the duration of the commitment, the Bank is required to provide a loan with pre-specified term to the customer. The nominal contractual loan value, when the loan agreed to be provided is on market terms, is not recorded in the statements of financial position. The related ECL allowances are disclosed in Note 22. V. Offsetting of financial instruments Financial asset and liability balances are offset, i.e., reported in the Consolidated Statements of Financial Position at their net amount, only if there is a legally enforceable right to offset the recorded amounts and the Bank intends either to settle them on a net basis or to realize the asset and settle the liability simultaneously. As of December 31, 2020 and 2019 the Bank does not have balance offsetting of financial instruments.
Definitions and classification of financial instruments – under IAS 39 (prior to January 1, 2018)	h) Definitions and classification of financial instruments – under IAS 39 (prior to January 1, 2018) i. Definitions A “financial instrument” is any contract that gives rise to a financial asset of one entity, and a financial liability or equity instrument of another entity. An “equity instrument” is a legal transaction that evidences a residual interest in the assets of an entity deducting all of its liabilities. A “financial derivative” is a financial instrument whose value changes in response to the changes in an underlying observable market variable (such as an interest rate, a foreign exchange rate, a financial instrument’s price, or a market index, including credit ratings), whose initial investment is very small compared with other financial instruments having a similar response to changes in market factors, and which is generally settled at a future date. “Hybrid financial instruments” are contracts that simultaneously include a non-derivative host contract together with a financial derivative, known as an embedded derivative, which is not separately transferable and has the effect that some of the cash flows of the hybrid contract vary in a way similar to a stand-alone derivative. ii. Classification of financial assets for measurement purposes Financial assets are classified into the following specified categories: trading investments at fair value through profit or loss (FVTPL), ‘held to maturity investments’, ‘available for sale investments (AFS)’ and ‘loans and accounts receivable from customers. The classification depends on the nature and purpose of the financial assets and is determined at the time of initial recognition. All regular purchases or sales of financial asset are recognized and derecognized on a trade basis. Regular way purchases or sales of financial assets require delivery of the asset within the time frame established by regulation or convention in the marketplace. Effective interest method The effective interest method is a method of calculating the amortized cost of a debt instrument and of allocating interest income over the relevant period. The effective interest rate is the rate that exactly discounts estimated future cash receipts (including all fees and points paid or received that form an integral part of the effective interest rate, transaction costs and other premiums or discounts) through the expected life of the debt instrument, or, where appropriate, a shorter period, to the net carrying amount on initial recognition. Income is recognized on an effective interest basis for loans and accounts receivables other than those financial assets classified as at fair value through profit or loss. Financial assets FVTPL – trading investment Financial assets are classified as FVTPL when the financial asset is either held for trading or they are designated as at fair value through profit or loss. A financial asset is classified as held for trading if: ● it has been acquired principally for the purpose of selling it in the near term; or ● on initial recognition it is part of a portfolio of identified financial instruments that the Bank manages together and has a recent actual pattern of short-term profit-taking; or ● it is a derivative that is not designated and effective as a hedging instrument. A financial asset other than a financial asset held for trading may be designated as FVTPL upon initial recognition if: such designation eliminates or significantly reduces a measurement or recognition inconsistency that would otherwise arise; or ● the financial asset forms part of a group of financial assets or financial liabilities or both, which is managed and its performance is evaluated on a fair value basis, in accordance with the Bank’s documented risk management or investment strategy, and information about the grouping is provided internally on that basis; or ● it forms part of a contract containing one or more embedded derivatives, and IAS 39 permits the entire combined contract to be designated as FVTPL. Financial assets at FVTPL are stated at fair value, with any gains or losses arising on remeasurement recognized in profit or loss. The net gain or loss recognized in profit or loss incorporates any dividend or interest earned on the financial asset and is included in the ‘net income (expense) from financial operations’ line item. Held to maturity investments Held-to-maturity investments are non-derivative financial assets with fixed or determinable payments and fixed maturity dates that the Bank has the positive intent and ability to hold to maturity. Subsequent to initial recognition, held-to-maturity investments are measured at amortized cost using the effective interest method less any impairment. Available for sale investments (AFS investments) AFS investments are non-derivatives that are either designated as AFS or are not classified as (a) loans and accounts receivable from customers, (b) held-to-maturity investments or (c) financial assets at fair value through profit or loss (trading investments). Financial instruments held by the Bank that are traded in an active market are classified as AFS and are stated at fair value at the end of each reporting period. The Bank also has investments in financial instruments that are not traded in an active market but that are also classified as AFS investments and stated at fair value at the end of each reporting period (because the Bank considers that fair value can be reliably measured). Changes in the carrying amount of AFS monetary financial assets relating to changes in foreign currency rates, interest income calculated using the effective interest method and dividends on AFS equity investments are recognized in profit or loss. Other changes in the carrying amount of available for sale investments are recognized in other comprehensive income and accumulated under the heading of “Valuation Adjustment”. When the investment is disposed of or is determined to be impaired, the cumulative gain or loss previously accumulated in the investments revaluation reserve is reclassified to profit or loss. Dividends on AFS equity instruments are recognized in profit or loss when the Bank’s right to receive the dividends is established. The fair value of AFS monetary financial assets denominated in a foreign currency is determined in that foreign currency and translated as the described in f) above. The foreign exchange gains and losses that are recognized in profit or loss are determined based on the amortized cost of the monetary asset. Loans and accounts receivable from customers Loans and accounts receivable from customers are non-derivative financial assets with fixed or determinable payments that are not quoted in an active market. Loans and accounts receivables from customers (including loans and accounts receivable from customers and interbank loans) are measured at amortized cost using the effective interest method, less any impairment. Interest income is recognized by applying the effective interest rate, except for short-term receivables when the effect of discounting is immaterial. iii. Classification of financial assets for presentation purposes For presentation purposes, the financial assets are classified by their nature into the following line items in the Consolidated Financial Statements: - Cash and deposits in banks: this line includes cash balances, checking accounts and on-demand deposits with the Central Bank of Chile and other domestic and foreign financial institutions. Amounts invested as overnight deposits are included in this item. - Cash items in process of collection: this item represents domestic transactions in the process of transfer through a central domestic clearinghouse or international transactions which may be delayed in settlement due to timing differences. - Trading investments: this item includes financial instruments held for trading and investments in mutual funds which must be adjusted to their fair value in the same way as instruments acquired for trading. - Investments under resale agreements: includes balances of financial instruments purchased under resale agreement. - Interbank loans : this item includes the balances of transactions with domestic and foreign banks, including the Central Bank of Chile, other than those reflected in certain other financial asset classifications listed above. - Loans and accounts receivables from customers: these loans are non-derivative financial assets for which fixed or determined amounts are charged, that are not listed on an active market and which the Bank does not intend to sell immediately or in the short term. When the Bank is the lessor in a lease, and it substantially transfers the risks and rewards incidental to the leased asset, the transaction is presented in loans and accounts receivable from customers while the leased asset is derecognized in the Bank´s statements of financial position. - Investment instruments: are classified into two categories: held-to-maturity investments, and available-for-sale investments. The held-to-maturity investment classification includes only those instruments for which the Bank has the ability and intent to hold to maturity. The remaining investments are treated as available for sale. iv. Classification of financial liabilities for measurement purposes The Bank classifies all financial liabilities as subsequently measured at amortized cost, except for: Financial liabilities at FVTPL As of December 31, 2020 and 2019 the Bank does not maintain financial liabilities at FVTPL. Other financial liabilities Other financial liabilities (including interbank borrowings, issued debt instruments and other payables) are initially recorded at fair value and subsequently measured at amortized cost using the effective interest method. v. Classification of financial liabilities for presentation purposes The financial liabilities are classified by their nature into the following line items in the consolidated statements of financial position: - Deposits and other on- demand liabilities: this includes all on-demand obligations except for term savings accounts, which are not considered on-demand instruments in view of their special characteristics. Obligations whose payment may be required during the period are deemed to be on-demand obligations. Operations which become callable the day after the closing date are not treated as on-demand obligations. - Cash items in process of being cleared: this represents domestic transactions in the process of transfer through a central domestic clearing house or international transactions which may be delayed in settlement due to timing differences, etc. - Obligations under repurchase agreements: this includes the balances of sales of financial instruments under securities repurchase and loan agreements. The Bank does not record in its own portfolio instruments acquired under repurchase agreements. - Time deposits and other time liabilities: this shows the balances of deposit transactions in which a term at the end of which they become callable has been stipulated. - Interbank borrowings: this includes obligations due to other domestic banks, foreign banks, or the Central Bank of Chile, other than those reflected in certain other financial liability classifications listed above. - Issued debt instruments: there are three types of instruments issued by the Bank: Obligations under letters of credit, Subordinated bonds and Senior bonds placed in the local and foreign market. - Other financial liabilities: this item includes credit obligations to persons other than domestic banks, foreign banks, or the Central Bank of Chile, for financing purposes or operations in the normal course of business. vi. Offsetting of financial instruments Financial asset and liability balances are offset, i.e., reported in the Consolidated Statements of Financial Position at their net amount, only if there is a legally enforceable right to offset the recorded amounts and the Bank intends either to settle them on a net basis or to realize the asset and settle the liability simultaneously. As of December 31, 2020 and 2019 vii. Derecognition of financial assets and liabilities The accounting treatment of transfers of financial assets is determined by the extent and the manner in which the risks and rewards associated with the transferred assets are transferred to third parties i. If the Bank transfers substantially all the risks and rewards of ownership to third parties, as in the case of unconditional sales of financial assets, sales under repurchase agreements at fair value at the date of repurchase, sales of financial assets with a purchased call option or written put option deeply out of the money, utilization of assets in which the transferor does not retain subordinated debt nor grants any credit enhancement to the new holders, and other similar cases, the transferred financial asset is derecognized from the Consolidated Statements of Financial Position and any rights or obligations retained or created in the transfer are simultaneously recorded. ii. If the Bank retains substantially all the risks and rewards of ownership associated with the transferred financial asset, as in the case of sales of financial assets under repurchase agreements at a fixed price or at the sale price plus interest, securities lending agreements under which the borrower undertakes to return the same or similar assets, and other similar cases, the transferred financial asset is not derecognized from the Consolidated Statements of Financial Position and continues to be measured by the same criteria as those used before the transfer. However, the following items are recorded: - An associated financial liability for an amount equal to the consideration received; this liability is subsequently measured at amortized cost. - Both the income from the transferred (but not removed) financial asset as well as any expenses incurred due to the new financial liability. iii. If the Bank neither transfers nor substantially retains all the risks and rewards of ownership associated with the transferred financial asset—as in the case of sales of financial assets with a purchased call option or written put option that is not deeply in or out of the money, securitization of assets in which the transferor retains a subordinated debt or other type of credit enhancement for a portion of the transferred asset, and other similar cases—the following distinction is made: a. If the transferor does not retain control of the transferred financial asset: the asset is derecognized from the Consolidated Statements of Financial Position and any rights or obligations retained or created in the transfer are recognized. b. If the transferor retains control of the transferred financial asset: it continues to be recognized in the Consolidated Statements of Financial Position for an amount equal to its exposure to changes in value and a financial liability associated with the transferred financial asset is recorded. The net carrying amount of the transferred asset and the associated liability is the amortized cost of the rights and obligations retained, if the transferred asset is measured at amortized cost, or the fair value of the rights and obligations retained, if the transferred asset is measured at fair value. Accordingly, financial assets are only derecognized from the Consolidated Statements of Financial Position when the rights over the cash flows they generate have terminated or when all the inherent risks and rewards of ownership have been substantially transferred to third parties. Similarly, financial liabilities are only derecognized from the Consolidated Statements of Financial Position when the obligations specified in the contract are discharged or cancelled or the contract has matured.
Derivatives and hedging activities	i) Derivatives and hedging activities The Bank has elected to continue applying the hedge accounting requirements of IAS 39 on adoption of IFRS 9. The Bank has not provided comparative information for prior periods on the date of initial application of IFRS 9 for the new disclosures introduces by IFRS 9 as a consequential amendment to IFRS 7, as permitted by IFRS 7 paragraph 44z. A “financial derivative” is a financial instrument whose value changes in response to the changes in an underlying observable market variable (such as an interest rate, a foreign exchange rate, a financial instrument’s price, or a market index, including credit ratings), whose initial investment is very small compared with other financial instruments having a similar response to changes in market factors, and which is generally settled at a future date. For presentation purposes, derivatives are presented in accordance with its positive or negative fair value as assets or liabilities, respectively, and include trading and hedging instruments separately (see Note 6). Hedging transactions The bank has elected to continue applying the hedge accounting requirements in IAS 39 instead of the requirements of IFRS 9, thus the Bank uses financial derivatives for the following purposes: i. to sell to customers who request these instruments in the management of their market and credit risks; ii. to use these derivatives in the management of the risks of the Bank entities’ own positions and assets and liabilities (“hedging derivatives”), and iii. to obtain profits from changes in the price of these derivatives (trading derivatives). All financial derivatives that are not held for hedging purposes are accounted for as trading derivatives. A derivative qualifies for hedge accounting if all the following conditions are met: 1. The derivative hedges one of the following three types of exposure: a. Changes in the value of assets and liabilities due to fluctuations, among others, in the interest rate and/or exchange rate to which the position or balance to be hedged is subject (“fair value hedge”); b. Changes in the estimated cash flows arising from financial assets and liabilities, and highly probable forecasted transactions (“cash flow hedge”); c. The net investment in a foreign operation (“hedge of a net investment in a foreign operation”). 2. It is effective in offsetting exposure inherent in the hedged item or position throughout the expected term of the hedge, which means that: a. At the date of arrangement the hedge is expected, under normal conditions, to be highly effective (“prospective effectiveness”). b. There is sufficient evidence that the hedge was actually effective during the life of the hedged item or position (“retrospective effectiveness”). 3. There must be adequate documentation evidencing the specific designation of the financial derivative to hedge certain balances or transactions and how this effective hedge was expected to be achieved and measured, provided that this is consistent with the Bank’s management of own risks. The changes in the value of financial instruments qualifying for hedge accounting are recorded as follows: a. For fair value hedges, the gains or losses arising on both hedging instruments and the hedged items (attributable to the type of risk being hedged) are included as “Net income (expense) from financial operations” in the Consolidated Statements of Income. b. For fair value hedges of interest rate risk on a portfolio of financial instruments (macrohedges), gains or losses that arise in measuring hedging instruments within “Interest income and expense”, and other gains or losses due to changes in fair value of the underlying hedged item (attributable to the hedged risk) are recorded in the Consolidated Statements of Income under “Net income (expense) from financial operations”. c. For cash flow hedges, the change in fair value of the hedging instrument is included as “Cash flow hedge” in “Other comprehensive income”. d. The differences in valuation of the hedging instrument corresponding to the ineffective portion of the cash flow hedging transactions are recorded directly in the Consolidated Statements of Income under “Net income (expense) from financial operations”. If a derivative designated as a hedging instrument no longer meets the requirements described above due to expiration, ineffectiveness or for any other reason, hedge accounting treatment is discontinued. When “fair value hedging” is discontinued, the fair value adjustments to the carrying amount of the hedged item arising from the hedged risk are amortized to gain or loss from that date, where applicable. When cash flow hedges are discontinued, any cumulative gain or loss of the hedging instrument recognized under “Other comprehensive income” (from the period when the hedge was effective) remains recorded in equity until the hedged transaction occurs, at which time it is recorded in the Consolidated Statements of Income, unless the transaction is no longer expected to occur, in which case any cumulative gain or loss is recorded immediately in the Consolidated Statements of Income.
Fair value measurement	j) Fair value measurement In general, financial assets and liabilities are initially recognized at fair value which, in the absence of evidence to the contrary, is deemed to be the transaction price. Financial instruments, other than those measured at fair value through profit or loss, are initially recognized at fair value plus transaction costs. Subsequently, and at the end of each reporting period, financial instruments are measured pursuant to the following criteria: i. Valuation of financial instruments Financial assets are measured according to their fair value, gross of any transaction costs that may be incurred in the course of a sale, except for loans and accounts receivable from customers. “Fair value” is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction in the principal (or most advantageous) market at the measurement date under current market conditions (i.e. an exit price) regardless of whether that price is directly observable or estimated using another valuation technique. When measuring fair value an entity shall take into account the characteristics of the asset or liability if market participants would take those characteristics into account when pricing the asset or liability at the measurement date. The fair value measurement assumes that the transaction to sell the asset or transfer the liability takes place either: (a) in the principal market for the asset or liability, or (b) in the absence of a principal market, the most advantageous market for the asset or liability. Even when there is no observable market to provide pricing information in connection with the sale of an asset or the transfer of a liability at the measurement date, the fair value measurement shall assume that the transaction takes place, considered from the perspective of a potential market participant who intends to maximize value associated with the asset or liability. When using valuation techniques, the Bank shall maximize the use of relevant observable inputs and minimize the use of unobservable inputs as available. If an asset or a liability measured at fair value has a bid price and an ask price, the price within the bid-ask spread that is most representative of fair value in the circumstances shall be used to measure fair value regardless of where the input is categorized within the fair value hierarchy (i.e. Level 1, 2 or 3). IFRS 13 establishes a fair value hierarchy that categorizes into three levels the inputs to valuation techniques used to measure fair value. The fair value hierarchy gives the highest priority to quoted prices (unadjusted) in active markets for identical assets or liabilities (Level 1 inputs) and the lowest priority to unobservable inputs (Level 3 inputs). All derivatives are recorded in the Consolidated Statements of Financial Position at the fair value previously described. This value is compared to the valuation as at the trade date. If the fair value is subsequently measured positive, this is recorded as an asset. If the fair value is subsequently measured negative, this is recorded as a liability. The fair value on the trade date is deemed, in the absence of evidence to the contrary, to be the transaction price. The changes in the fair value of derivatives from the trade date are recorded in “Net income (expense) from financial operations” in the Consolidated Statements of Income. Specifically, the fair value of financial derivatives included in the portfolios of financial assets or liabilities held for trading is deemed to be their daily quoted price. If, for exceptional reasons, the quoted price cannot be determined on a given date, the fair value is determined using similar methods to those used to measure over the counter (OTC) derivatives. The fair value of OTC derivatives is the sum of the future cash flows resulting from the instrument, discounted to present value at the date of valuation (“present value” or “theoretical close”) using valuation techniques commonly used by the financial markets: “net present value” (NPV) and option pricing models, among other methods. Also, within the fair value of derivatives are included Credit Valuation Adjustment (CVA) and Debit Valuation Adjustment (DVA), all with the objective that the fair value of each instrument includes the credit risk of its counterparty and Bank´s own risk. The Credit valuation adjustment (CVA) is a valuation adjustment to OTC derivatives as a result of the risk associated with the credit exposure assumed by each counterparty. The CVA is calculated taking into account potential exposure to each counterparty in each future period. The debit valuation adjustment (DVA) is a valuation adjustment similar to the CVA but, in this case, it arises as a result of the Bank’s own risk assumed by its counterparties in OTC derivatives. ii. Valuation techniques Financial instruments at fair value, determined on the basis of price quotations in active markets, include government debt securities, private sector debt securities, equity shares, short positions, and fixed-income securities issued. In cases where price quotations cannot be observed in available markets, the Bank’s management determines a best estimate of the price that the market would set using its own internal models. In most cases, these models use data based on observable market parameters as significant inputs however for some valuations of financial instruments, significant inputs are unobservable in the market. To determine a value for those instruments, various techniques are employed to make these estimates, including the extrapolation of observable market data. The most reliable evidence of the fair value of a financial instrument on initial recognition usually is the transaction price, however due to lack of availability of market information, the value of the instrument may be derived from other market transactions performed with the same or similar instruments or may be measured by using a valuation technique in which the variables used include only observable market data, mainly interest rates. The main techniques used as of December 31, 2020 and 2019 by the Bank’s internal models to determine the fair value of the financial instruments are as follows: i. In the valuation of financial instruments permitting static hedging (mainly forwards and swaps), the present value method is used. Estimated future cash flows are discounted using the interest rate curves of the related currencies. The interest rate curves are generally observable market data. ii. In the valuation of financial instruments requiring dynamic hedging (mainly structured options and other structured instruments), the Black-Scholes model is normally used. Where appropriate, observable market inputs are used to obtain factors such as the bid-offer spread, exchange rates, volatility, correlation indexes and market liquidity. iii. In the valuation of certain financial instruments exposed to interest rate risk, such as interest rate futures, caps and floors, the present value method (futures) and the Black-Scholes model (plain vanilla options) are used. The main inputs used in these models are observable market data, including the related interest rate curves, volatilities, correlations and exchange rates. The fair value of the financial instruments calculated by the aforementioned internal models considers contractual terms and observable market data, which include interest rates, credit risk, exchange rates, quoted market price of shares, volatility and prepayments, among others. The Bank’s management considers that its valuation models are not significantly subjective, since these methodologies can be adjusted and evaluated, as appropriate, through the internal calculation of fair value and the subsequent comparison with the related actively traded price.
Recognising income and expenses	k) Recognizing income and expenses The most significant criteria used by the Bank to recognize its revenues and expenses are summarized as follows: i. Interest revenue, interest expense, and similar items Interest income is calculated by applying the effective interest rate to the gross carrying amount of financial assets, except for financial assets that have subsequently become credit-impaired (or ’stage 3’), for which interest revenue is calculated by applying the effective interest rate to their amortized cost (i.e. net of the ECL provision). ii. Commissions, fees, and similar items Fee and commission income and expenses are recognized in the Consolidated Statements of Income using criteria established in IFRS 15 “Revenue from contracts with customers”. See disclosure in Note 2 relating adoption and impact of IFRS 15. Under IFRS 15, the Bank recognises revenue when (or as) satisfied a performance obligations by transferring a service (i.e. an asset) to a customer; under this definition an asset is transferred when (or as) the customer obtains control of that asset. The Bank considers the terms of the contract and its customary business practices to determine the transaction price. The transaction price is the amount of consideration to which an entity expects to be entitled in exchange for transferring promised goods or services to a customer, excluding amounts collected on behalf of third-parties. The Bank transfers control of a good or service over time and, therefore, satisfies a performance obligation and recognises revenue over time, and/or the Bank satisfies the performance obligation at a point in time. The main revenues arising from commissions, fees and similar items correspond to: - Fees and commissions for lines of credits and overdrafts: includes accrued fees related to granting lines of credit and overdrafts in checking accounts. - Fees and commissions for guarantees and letters of credit: includes accrued fees in the period relating to granting of guarantee payment for current and contingent third party obligations. - Fees and commissions for card services: includes accrued and earned commissions in the period related to use of credit cards, debit cards and other cards - Fees and commissions for management of accounts: includes accrued commissions for the maintenance of checking, savings and other accounts - Fees and commissions for collections and payments: includes income arising from collections and payments services provided by the Bank. - Fees and commissions for intermediation and management of securities: includes income from brokerage, placements, administration and securities’ custody services. - Fees and commissions for insurance brokerage fees: includes income arising for insurances distribution. - Other fees and commissions: includes income arising from currency changes, financial advisory, cashier check issuance, placement of financial products and online banking services. The main expenses arising from commissions, fees and similar items correspond to: - Compensation for card operation: includes commission expenses for credit and debit card operations related to income commissions card services. - Fees and commissions for securities transactions: includes commissions expense for deposits, securities custody service and securities’ brokerage. - Other fees and commissions: include mainly expenses generated from online services. The Bank has incorporated disaggregated revenue and expense disclosures and reportable segment relationship in Note 27. Additionally, the Bank maintains certain loyalty programs associated to its credit cards services, for which it has deferred a percentage of the consideration received in the statements of financial position to comply with its related performance obligation or has liquidated on a monthly basis as far they arise. iii. Loan arrangement fees Fees that arise as a result of the origination of a loan, mainly application and analysis-related fees, are deferred and charged to the Consolidated Statements of Income over the term of the loan.
Impairment of non-financial assets	l) Impairment of non-financial assets The Bank’s non-financial assets, are reviewed at the reporting date to determine whether they show signs of impairment (i.e. its carrying amount exceeds its recoverable amount). If any such evidence exists, the recoverable amount of the asset is estimated, in order to determine the extent of the impairment loss. Recoverable amount is the higher of fair value less costs to sell and value in use. In assessing value in use, the estimated future cash flows are discounted to their present value using a pre-tax discount rate that reflects current market assessments of the time value of money and the risks specific to the asset for which the estimates of future cash flows have not been adjusted. If the recoverable amount of an asset is estimated to be less than its carrying amount, the carrying amount of the asset is reduced to its recoverable amount. An impairment loss is recognized immediately in profit or loss. In connection with other assets, impairment losses recorded in prior periods are assessed at each reporting date to determine whether the loss has decreased and should be reversed. The increased carrying amount of an asset other than goodwill attributable to a reversal of an impairment loss shall not exceed the carrying amount that would have been determined (net of amortization or depreciation) had no impairment loss been recognized for the asset in prior years. Goodwill impairment is not reversed.
Property, plant, and equipment	m) Property, plant, and equipment This category includes the amount of buildings, land, furniture, vehicles, computer hardware and other fixtures owned by the consolidated entities or acquired under finance leases. Assets are classified according to their use as follows: i. Property, plant and equipment for own use Property, plant and equipment for own use includes but is not limited to tangible assets received by the consolidated entities in full or partial satisfaction of financial assets representing accounts receivable from third parties which are intended to be held for continuing own use and tangible assets acquired under finance leases. These assets are presented at acquisition cost less the related accumulated depreciation and, if applicable, any impairment losses (when net carrying amount was higher than recoverable amount). Depreciation is calculated using the straight-line method over the acquisition cost of assets less their residual value, assuming that the land on which buildings and other structures stand has an indefinite life and, therefore, is not subject to depreciation. The Bank applies the following useful lives for the tangible assets that comprise its assets: ITEM Useful life (Months) Land - Paintings and works of art - Carpets and curtains 36 Computers and hardware 36 Vehicles 36 IT systems and software 36 ATMs 60 Other machines and equipment 60 Office furniture 60 Telephone and communication systems 60 Security systems 60 Rights over telephone lines 60 Air conditioning systems 84 Other installations 120 Buildings 1,200 The consolidated entities assess at each reporting date whether there is any indication that the carrying amount of any tangible asset exceeds its recoverable amount. If this is the case, the carrying amount of the asset is reduced to its recoverable amount and future depreciation charges are adjusted in accordance with the revised carrying amount and to the new remaining useful life. The estimated useful lives of the items of property, plant and equipment held for own use are reviewed at the end of each reporting period to detect significant changes. If changes are detected, the useful lives of the assets are adjusted by correcting the depreciation charge to be recorded in the Consolidated Statements of Income in future years on the basis of the new useful lives. Maintenance expenses relating to tangible assets held for own use are recorded as an expense in the period in which they are incurred. ii. Assets leased out under operating leases The criteria used to record the acquisition cost of assets leased out under operating leases, to calculate their depreciation and their respective estimated useful lives, and to record the impairment losses thereof, are consistent with those described in relation to property, plant and equipment held for own use.
Leasing	n) Leasing As of January 1, 2019, the Bank has started to apply IFRS 16 “Leases”, using the modified retrospective method and therefore, no comparative information is required, and 2018 balances continue to be reported under IAS 17 “Leases”. Policy applicable from January 1, 2019 At inception of a contract the Bank assesses whether a contract contains a lease. A contract contains a lease if the contracts conveys the right to control the use of an identified asset for a period of time in exchange for consideration. To assess whether a contract conveys the right to control the use of an identified asset, the Bank assesses whether: ● the contract involves the use of an identified asset – this may be specified explicitly or implicitly and should be physically distinct. If the supplier has a substantive substitution right, then the asset is not identified. ● the Bank has the right to obtain substantially all of the economic benefits from use of the asset throughout the period of use, and ● the Bank has the right to direct the use of the asset – this is decision-making purpose for which asset is use. a. As a Lessee The Bank recognizes a right-of-use asset and a lease liability at the lease commencement date in accordance within IFRS 16 “Leases”. The main contracts that the Bank has are offices and branches related, which are necessary to carry out its activities. At the beginning, the right-of-use asset is equal to the lease liability and is calculated as the present value of the lease payments discounted using the incremental interest rate at the commencement date, considering the lease term of each contract. The average incremental interest rate as of December 31, 2020 is 1.45%. After initial recognition, the right-of-use is subsequently depreciated using the straight-line method in accordance with the lease term of the contract, and the lease liability is amortized in accordance with the effective interest method. Financial interest is accounted as interest expense, and depreciation as depreciation expense in each period. The term of the lease comprises non-cancelable periods established within each contract, while for lease contracts with an indefinite useful life, the Bank has determined to assign a useful life equal to the longer non-cancelable period of its lease agreements. The Bank has elected not to recognize right-of-use assets and lease liabilities for short term leases that have a lease term of 12 months or less and leases of low-value assets. The Bank recognizes lease payments associated with these leases as an expense on a straight-line basis over the lease term. Any modification in the terms or lease should be treated as a new measurement. Initially, the Bank measures the right-of-use asset at cost. The rent of the lease agreements is agreed in UF and paid in pesos. According to that, monthly variation in UF should be treated as a new measurement, and therefore, readjustments should be recognized as a modification to the obligation and the right-of-use asset. The Bank has not entered into lease agreements with residual value guarantee or variable lease payments. In applying IFRS 16, the Bank has used the following practical expedients permitted by the standard: ● accounting for operating leases with a remaining lease term of less than 12 months as at January 1, 2019 as short-term leases. ● excluding initial direct costs for the measurement of the right-of-use asset at the date of initial application. The Bank has also elected not to reassess whether a contract is or contains a lease at the date of initial application. Instead, for contracts entered into before the transition date the Bank relied on its assessment made applying IAS 17 and Interpretation 4 Determining whether an Arrangement contains a Lease. b. As a lessor When the Bank acts as a lessor, it determines at the beginning if it corresponds to a financial or operating lease. To do this, it evaluates whether it has substantially transferred all the risks and benefits of the asset. In the affirmative case, it corresponds to a financial lease, otherwise it is a financial lease. The Bank recognizes the lease income on a straight-line basis over the lease term. c. Third party financing The Bank recognizes the loans with third parties within “Loans and accounts receivable from customers” in the Consolidated Statements of Financial Position, the sum of the present value of the lease payments receivable from the lessee, including the exercise price of the lessee’s purchase option at the end of the lease term, when at the inception of the lease it is reasonably certain that the lessee will exercise the option. The finance income and expenses arising from these contracts are recorded under “Interest income” and “Interest expense” respectively, in Consolidated Statements of Income to achieve constant return rate over the lease term. Policy applicable prior to January 1, 2019 Prior to effective date of IFRS 16, the Bank applied IAS 17 Leases. i. Finance leases Finance leases are leases that substantially transfer all the risks and rewards incidental to ownership of the leased asset to the lessee. The Bank recognized as lending to third parties under “Loans and accounts receivable from customers” in the Consolidated Statements of Financial Position, the sum of the present value of the lease payments receivable from the lessee, including the exercise price of the lessee’s purchase option at the end of the lease term, when at the inception of the lease it is reasonably certain that the lessee will exercise the option. When consolidated entities acts as lessees, the leased assets are classified based on their nature in the Consolidated Statements of Financial Position, and recognizing an asset and liability at the same amount (the lower between the fair value of the leased property and the present value of the minimum lease payments, plus purchase option). These assets are depreciated in accordance with property, plant and equipment for own use criterion. In both cases, the finance income and expenses arising from these contracts are recorded under “Interest income” and “Interest expense” respectively, in Consolidated Statements of Income to achieve constant return rate over the lease term. ii. Operating leases In operating leases, the ownership of the leased asset and substantially all the risks and rewards incidental thereto remain with the lessor. When the consolidated entities act as a lessor, the leased assets are classified at their acquisition cost under “Property, plant and equipment”. The depreciation criterion for these assets is consistent with that for similar items of property, plant and equipment held for own use and revenues from operating leases are recorded on a straight-line basis under “Other operating income” in the Consolidated Statements of Income. When the consolidated entities act as the lessees, the lease expenses, including any incentives granted by the lessor, are charged on a straight-line basis to “Administrative expenses” in the Consolidated Statements of Income. iii. Sale and leaseback transactions For sale at fair value and operating leasebacks, the profit or loss generated is recorded at the time of the sale except in the case of excess of proceeds over fair value, which is amortized over the period of use of the asset. In the case of finance leasebacks, the profit or loss generated is amortized over the lease term.
Intangible assets	o) Intangible assets Intangible assets are identified as non-monetary assets (separately identifiable from other assets) without physical substance which arise as a result of legal or contractual rights. The Bank recognizes an intangible asset, whether purchased or self-created (at cost), when the cost of the asset can be measured reliably, and it is probable that the future economic benefits that are attributable to the asset will flow to the Bank. Intangible assets are recorded initially at acquisition or production cost and are subsequently measured at cost less any accumulated amortization and any accumulated impairment losses. Internally developed computer software is recorded as an intangible asset if, among other requirements (basically the Bank’s ability to use or sell it), it can be identified and its ability to generate future economic benefits can be demonstrated. Intangible assets are amortized on a straight-line basis using the estimated useful life, which has been defined by default in 36 months, and can be modified to the extent that it is demonstrated that the Bank will benefit from the use of the intangible for a different period mentioned above. Expenditure on research activities is recorded as an expense in the year in which it is incurred and cannot be subsequently capitalized.
Cash and cash equivalents	p) Cash and cash equivalents For the preparation of the cash flow statements, the indirect method was used, starting with the Bank’s consolidated pre-tax income and incorporating non-cash transactions, as well as income and expenses associated with cash flows, which are classified as operating, investment or financing activities. For the preparation of the cash flow statements, the following items are considered: i. Cash flows: Inflows and outflows of cash and cash equivalents, such as deposits with the Central Bank of Chile, deposits in domestic banks, and deposits in foreign banks. ii. Operating activities: Principal revenue-producing activities performed by banks and other activities that cannot be classified as investing or financing activities. The Bank’s activity of granting loans encompasses not only the activities with its debtors but also the related activities that provide the funding to the loans granted. Since the funding for granting such loans is provided by, among other sources, senior bonds, mortgage bonds and subordinated bonds, the Bank presents the related cash flows as operating activities. iii. Investing activities: The acquisition and disposal of long-term assets and other investments not included in cash and cash equivalents. iv. Financing Activities: Activities that result in changes in the size and composition of the equity and liabilities that are not operating activities.
Expected credit losses allowance – under IFRS 9	q) Expected credit losses allowance – under IFRS 9 Starting from January 1, 2018, the Bank replaced the “incurred loss” model of IAS 39 with an “expected credit loss (ECL)” model established by IFRS 9. The new single impairment model applies to all financial assets measured at amortized cost and fair value through other comprehensive income (FVOCI), including commitment and contingent loans. Investments in equity are outside of the scope of the new impairment requirements. The Bank accounted ECL related to financial assets measured at amortized cost as a loss allowance in the statements of financial position, but the carrying amount of these assets is stated net of the loss allowance. ECL related to contingent loans is accounted as a provision in the statements of financial position. The Bank recognizes in profit or loss, as an impairment gain or loss, the amount of ECL (or reversal) that is required to adjust the loss allowance at the reporting date to the amount that is required to be recognized in accordance IFRS 9, for financial assets measured at amortized cost and contingent loans. The new model uses a dual measurement approach, under which the loss allowance is measured as either: - 12-month expected credit losses - Lifetime expected credit losses The Bank has defined default on individual or collective basis: ● Individual: when exposure is more than 89 days past due, it has been restructured, it is in judicial collection, it has been write-off, drag effect define as the entire outstanding amount on any loan which is 89 days or more past due. ● Collective: when exposure is more than 89 days past due, it has been restructured, or has been identified as impaired by an internal risk committee). The measurement basis depends on whether there has been a significant increase in credit risk since initial recognition. Based on changes in credit quality since initial recognition, IFRS 9 outlines a “three-stage” model impairment in accordance with the following diagram: Change in credit quality since initial recognition Stage 1 Stage 2 Stage 3 Initial recognition Significant increase in credit risk since initial recognition Credit impaired assets 12-month expected credit losses Lifetime expected credit losses Lifetime expected credit losses The Bank, at the end of each reporting period, evaluated whether financial instrument’s credit risk has significantly increased since initial recognition or whether an asset is considered to be credit-impaired, and consequently classified financial instrument in the respective stage: ● Stage 1: When loans are first recognized, the Bank recognizes an allowance based on 12 months ECL. Stage 1 loans also include facilities where the credit risk has improved and the loan has been returned to Stage 1. ● Stage 2: When a loan has shown a significant increase in credit risk since origination, the Bank records an allowance for the lifetime ECL. Stage loans also include facilities, where the credit risk has improved and the loan has been returned to stage 2. ● Stage 3: Loans considered credit impaired. The Bank records an allowance for the lifetime ECL, setting the PD at 100%. The Bank considers reasonable and supportable information that is available without undue cost or effort and that may affect the credit risk on a financial instrument, including forward looking information to determine a significant increase in credit risk since initial recognition. Forward looking information includes past events, current conditions and forecast or future economic conditions (macro-economic data). Credit risk assessment and forward-looking information (including macro-economic factors), includes quantitative and qualitative information based on the Bank’s historical experience, some examples are: a. Financial or economic conditions that are expected to cause a significant change in the borrower’s ability to meet its debt obligations b. An actual or expected internal credit rating downgrade for the borrower or decrease in behavioral scoring c. An actual or expected significant change in the operating results of the borrower. d. Significant increases in credit risk on other financial instruments of the same borrower. e. Significant changes in the value of the collateral supporting the obligation or in the quality of third-party guarantees or credit enhancements. f. Reductions in financial support from a parent entity or other affiliate. g. Expected changes in the loan documentation including an expected breach of contract that may lead to covenant waivers or amendments, interest payment holidays, interest rate step-ups, requiring additional collateral or guarantees, or other changes to the contractual framework of the instrument. The Bank has considered that if contractual payments are more than 30 days past due, the credit risk is deemed to have increased significantly since initial credit recognition but is not an absolute indicator. The bank did not rebut the backstop presumption of IFRS 9 relating to SICR or default. i. Expected credit loss measurement The ECL are the probability-weighted estimate of credit losses, i.e. the present value of all cash shortfalls. A cash shortfall is the difference between the cash flows that are due to an entity in accordance with the contract and the cash flows that the entity expects to receive. The three main components to measure the ECL are: PD: The Probability of default is an estimate of the likelihood of default over a given time horizon. A default may only happen at a certain time over the assessed period, if the facility has not been previously derecognized and is still in the portfolio. LGD: The loss given default is an estimate of the loss arising in the case where a default occurs at a given time. It is based on the difference between the contractual cash flows due and those that the lender would expect to receive, including from the realization of any collateral. EAD: The Exposure at default is an estimate of the exposure at a future default date, taking into account expected changes in the exposure after the reporting date, including repayments of principal and interest, whether scheduled by contract or otherwise, expected drawdown on committed facilities, and accrued interest from missed payments. For measuring 12-month and lifetime ECL, cash shortfalls are identified as follow: - 12-month expected credit losses: the portion of lifetime expected credit losses that represents the expected credit losses that result from default events on the financial instruments that are possible within the 12 months after the reporting date. - Lifetime expected credit losses: the expected credit losses that result from all possible default events over the expected life of the financial instrument. The Bank considered a multi-factor analysis to perform credit risk analysis. T The Bank divides its portfolio as: i. Commercial loans, ii. Mortgage loans, and iii. Consumer loans. iv. Contingent loans The Bank evaluates individually whether objective evidence of impairment exists for loans that are individually significant, then collectively assesses loans that are not individually significant and loans which are significant but for which there is no objective evidence of impairment available under individually assessment. ii. Contingent loans The Bank enters into various irrevocable loan commitments and contingent liabilities. Even though these obligations may not be recognized on the statements of financial position, they contain credit risk and, therefore, form part of the overall risk of the Bank. When the Bank estimates the ECL for contingent loans, it estimates the expected portion of the loan commitment that will be drawn down over its expected life. iii. Forward looking information The ECL model includes a broad range of forward-looking information as economic inputs, such as: ● GDO growth ● Unemployment rates ● Central Banks interest rates ● Real estate prices iv. Modifications of financial assets When loan measured at amortized cost has been renegotiated or modified but not derecognized, the Bank recognizes the resulting gains or losses as the difference between the carrying amount of the original loans and modified contractual cash flows discounted using the EIR before modification. For ECL estimation purposes on financial assets that have been modified, is required to distinguish between modification that result in derecognition from those that does not result in derecognition. If the modification does not result in derecognition, then the subsequent assessment of whether there is a significant increase in credit risk is made comparing the risk at the reporting date based on the modified contractual term and the risk at initial recognition based on the original, unmodified contractual term. If the modification results in derecognition, then the modified asset is considered to be a new asset. Accordingly, the date of modification is treated as the date of initial recognition for the purposes of the impairment requirements. v. Collateral The Banks seeks to use collateral to mitigate its credit risks on financial assets, where possible. Types of collateral are: cash, securities, letters of credit, real state and inventories. The estimation of ECL reflects the cash flows expected from collateral and other credit enhancement that are part of the contractual terms of the financial instruments. According to the Bank’s policy when an asset (real estate) is repossessed are transferred to assets held for sale at their fair value less cost to sell as non-financial assets at the repossession date. vi. Write-offs The gross carrying amount of a financial asset is reduced when there is no reasonable expectation of recovery. A write-off constitutes a derecognition event of the corresponding loan transaction in its entirety, and therefore, include portions not past-due for installments loans or leasing operation (no partial write-off). Subsequent recoveries of amounts previously written-off are credited to the income statements, as recovery of loans previously write-off, Loan and accounts receivable write-offs are recorded for overdue and current installments based on the time periods expired since reaching overdue status, as described below: Type of loan Term Consumer loans with or without collateral 6 months Other transactions without collateral 24 months Commercial loans with collateral 36 months Mortgage loans 48 months Consumer leasing 6 months Other non-mortgage leasing transactions 12 months Mortgage leasing (household and business) 36 months vii. Covid-19 support measures The COVID-19 pandemic has had a major impact on Chile and global economies in 2020. As a result, the Chilean government has announced a series of measures to support lending. The largest measure was to provide additional funds to the Guarantee Fund for Small Companies (Fogape), a state fund that guarantees loans, leases and other credits provided to small businesses, extend Fogape’s coverage to companies with annual sales of up to UF 1 million and further amend the rules and regulations governing Fogape to encourage banks to provide lending to small businesses. Under Fogape’s new regulations, domestic banks, including us, may provide loans with preferential interest rates equal to the MPR plus 3% and terms of up to 48 months to eligible companies in an aggregate amount equal to up to 3 months of a company’s sales and receive a guarantee from Fogape for between 60% and 85% of each loan (“Fogape loans”). Such loans must have a 6-month grace period before a company must begin paying the loan. In addition, companies that receive loans guaranteed by Fogape pursuant to these new regulations, will also have payment holiday for all other outstanding loans until a period of 6 months. Additionally, the Bank – in accordance with CMF’s instruction to facilitate access to credit for companies and household - has provided payment holiday terms of up to three months to mortgage customers with no more 30 days past due. This was extended by a further three months for customers in need. For consumer loans, the Bank has granted benefits such as a 3-month grace period to start paying, increases in terms, decreases in installments, and has even opted for current lower market rates. Customers who sought COVID-19 related support, including payment holidays, were not the subject of any wider SICR triggers, and do not have to be moved to Stage 2 for a lifetime ECL assessment unless they had triggered other SICR criteria, and payment holidays also did not cause accounts to become past due and therefore did not automatically trigger a Stage 2 or Stage 3 lifetime ECL assessment. The assessment of SICRs and the measurement of ECLs are required to be based on reasonable and supportable information that is available to an entity without undue cost or effort. The Bank has developed estimates based on the best available information about past events, current conditions and forecasts of economic conditions. In assessing forecast conditions, the Bank has considered the effects of COVID-19 and the support measures being undertaken. Despite of the above, with current COVID-19 infection rates having increased and continued high levels of uncertainty in the macro-economic outlook and to address a potential lag in defaults, the Bank has decided not to make changes over IFRS9 models regarding COVID-19, but rather has established management overlay or post-model adjustments for 2020 expected credit losses allowance. See Note N°37, Risk management.
Allowance for loan losses – under IAS 39	r) Allowance for loan losses – under IAS 39 Prior to adoption of IFRS 9, the Bank established allowances to cover incurred losses on loans and account receivables from customers in accordance with its internal models and risk assessment as approved by the Board of Directors. The Bank performed an assessment of the risk associated with loans and accounts receivable from customers to determine their allowance for loan losses as described below: - Individual assessment – represented cases where the Bank assesses a debtor as individually significant, or when he/she could not be classified within a group of financial assets with similar credit risk characteristics, due to their size, complexity or level of exposure. - Group assessment - a group assessment was relevant for analyzing a large number of transactions with small individual balances from individuals or small companies. The Bank grouped debtors with similar credit risk characteristics giving to each group a default probability and recovery rate based on a historical analysis. The Bank models determined allowances and provisions for loan losses according to the type of portfolio or transactions. Loans and accounts receivables from customers were divided into three categories: i. Commercial loans, ii. Mortgage loans, and iii. Consumer loans. The models used to determine credit risk allowances are described as follows: I. Allowances for individual assessment An individual assessment of commercial debtors was necessary in the case of companies which, due to their size, complexity or level of exposure regarding the entity, must be known and analyzed in detail. For the purposes of establishing its provisions, the Bank assigned a risk category to each debtor, their loans and contingent loans. The risk factors considered were industry or economic sector of the borrower, owners or managers of the borrower, their financial situation and payment capacity, and payment behavior. The Bank’s risk categories were as follows: 1. Debtors may be classified in risk categories A1, A2, A3 or B (if they are current on their payment obligations and show no sign of impairment in their credit quality). B is different from the A categories by a certain history of late payments. The A and B categories were distinguished by different PNPs (as defined below). 2. Debtors classified as C1, C2, C3, C4, D1 or D2 included debtors whose loans with us have been charged off or administered by our Recovery Unit or identified as impaired by an internal risk committee. For loans classified as A1, A2, A3 and B, we assigned a specific provision level on an individual basis to each borrower and, therefore, the amount of loan loss allowance is determined on a case by case basis. Estimated Incurred Loan Loss = Loan Loss Allowance. The estimated incurred loss was obtained by multiplying all risk factors defined in the following equation: EIL= EXP x PNP x SEV EIL = Estimated Incurred Loan Loss. The estimated incurred loan loss is how much could be lost in the event a debtor does not perform the obligations under the loan. EXP = Exposure. This corresponds to the value of commercial loans. PNP = Probability of Non-Performance. This variable, expressed as a percentage, indicates the probability that a debtor will default. This percentage is associated with the internal rating that we give to each debtor, which is determined by analyzing such parameters as debt servicing capacity (including, usually, projected cash flows), the company’s financial history, the solvency and capacity of shareholders and management, and projections for the economic sector in which it operates. SEV = Severity. This is the effective loss rate given default for debtors in the same segment, which is determined statistically based on the historical effective losses for each segment. Every year, models together with PNP and SEV assumptions, were tested by the Bank’s Credit Risk Department, to ensure that they are appropriate at each reporting date so as to make sure any difference between the estimated incurred losses and actual losses is reduced. These tests focused on the validation of the sufficiency of the Bank’s allowances and consisted of comparisons between actual write-offs to allowances established by the model, and the coverage of the total allowance to actual write-offs in the most current periods. Individual loan classification and improvements to any customer classification were also presented for approval to our Risk Committee. For loans classified in the C and D categories, loan loss allowances were based mainly on the fair value of the collateral, adjusted for an estimated cost to sell, that each of these loans have. Allowance percentage for each category was then based on the fair value of the collateral, or the expected future cash flow from the loan for each individually evaluated non-performing loans. II. Allowances for group assessments The Bank used the concept of estimation of incurred loss to quantify the allowances levels over the group-evaluated portfolios, considering the risk and the guarantees associated with each transaction. Following the Bank’s definition, the Bank used group evaluation to approach transactions that have similar credit risk features, which indicated the debtor’s payment capacity over the entire debt, principal and interests, pursuant to the contract’s terms. In addition, this allowed us to assess a high number of transactions with low individual amounts, whether they belong to individuals or SMEs (small and medium sized companies). Therefore, debtors and loans with similar features were grouped together and each group has a risk level assigned to it. These models were meant to be used mainly to analyze loans granted to individuals (including consumer loans, credit lines, mortgage loans and commercial loans) and commercial loans to small to middle-sized entities (SMEs). Allowances were established using these models, taking into account the historical Impairment and other known circumstances at the time of evaluation. After this, a historical loss rate was assigned to each portfolio profile constituting each evaluated group. Allowances for group-evaluated loans were established based on the credit risk of the profile to which the loan belongs. The method for assigning a profile was based on statistical building method, establishing a relation through logistic regression of various variables, such as payment behavior in the Bank, payment behavior outside the Bank, various sociodemographic data, among others, and a response variable that determined a client’s risk level, which in this case was 90 days of non-performance (the chosen features are relevant when calculating future cash flows per group of assets). Afterwards, common profiles were established and with differentiated default rates, applying the real historical loss the Bank had with that portfolio. The different risk categories were constructed and updated periodically based on the payment behavior of the client’s profile to which they belong, as well as his or her sociodemographic characteristics. Therefore, when a customer had past due balance or has missed some payments, the outcome was that the customer will move to a different segment with a higher loss rate, therefore capturing current trends for each risk profile. Allowance quantification, once the customers have been classified, was the product of three factors: exposure (EXP), Probability of Non-Performance (PNP) and Severity (SEV), the same equation used for individual assessment mentioned above. The estimated incurred loss rates for group-evaluated loans correspond to charge-offs net of recoveries. The methodology established the period in which the estimated incurred loss for each risk profile emerges. Once the loss has been considered to have been incurred, the estimated incurred loss rates were applied to the corresponding risk profile to obtain the net charge-off level associated with this period. The loss rates applied to each risk profile are based only on the historical net charge-off data for that specific profile within one of the four groups of loans (consumer loans, credit lines, mortgage loans and commercial loans). No other statistical or other information other than net charge-offs was used to determine the loss rates. To determine the estimated incurred loss for commercial and mortgage loans collectively evaluated for impairment, we mainly analyzed the payment behavior of clients, particularly the payment behavior of clients with payments that are more than 90 days overdue, clients with other weaknesses, such as early nonperformance (i.e., payments that are past-due, though by less than 90days), clients with modified loans and clients with renegotiated loans, as well as success in recovery against these clients. We also took into account whether the loan is supported by collateral. In connection with mortgage loans, historical net charge-offs were considered in the model to calculate loss rates for loans collectively evaluated for impairment. The risk categories were such that when a customer has a past-due balance or has missed some payments, the outcome was that the customer will move to a different risk category with a higher loss rate, therefore capturing current trends of the customer and, when aggregate, current trends in the market. Our models for loans analyzed on a group basis (consumer loans, residential mortgage loans and small-and-mid- sized commercial loans) were monitored on a monthly basis with respect to predictability and stability, using indicators that seek to capture the underlying need to update the models for current loss trends. Therefore, the periods of historical net charge-offs used in the allowance model may were more than a year old as we only updated the historical net charge-offs when our assessment of predictability and stability indicators determine it was necessary. III. Charge-offs As a general rule, charge-offs should be done when all collection efforts have been exhausted. These charge-offs consisted of derecognition from the Consolidated Statements of Financial Position of the corresponding loans transactions in its entirety, and, therefore, included portions not past-due of a loan in the case of installments loans or leasing transactions (no partial charge-offs exist). Subsequent payments obtained from charged-off loans were recognized in the Consolidated Statements of Income as a recovery of loans previously charged-off. Loan and accounts receivable charge-offs were recorded for overdue and current installments based on the time periods expired since reaching overdue status, as described below: Type of loan Term Consumer loans with or without collateral 6 months Other transactions without collateral 24 months Commercial loans with collateral 36 months Mortgage loans 48 months Consumer leasing 6 months Other non-mortgage leasing transactions 12 months Mortgage leasing (household and business) 36 months IV. Recovery of loans previously charged off and accounts receivable from customers Any payment agreement of an already charged-off loan did not give rise to income—as long as the operation was in an impaired status—and the effective payments received were accounted for as a recovery from loans previously charged-off. Recovery of previously charged-off loans and accounts receivable from customers, were recorded in the Consolidated Statements of Income as a deduction from provisions for loan losses. In accordance with our charge-off policy described in iii) above, we may subsequently recover a portion of the amount charged-off (at 100%). The allowance for loan losses on our collectively evaluated loans incorporates an expected recovery rate based on historical information. At the time we charged-off the carrying amount of any loans which have been collectively evaluated for impairment, the allowance for loan losses on collectively evaluated loans was replenished to reflect incurred losses based on statistical models developed in compliance with IAS 39 on the remaining pool of loans. The amounts required for replenishment were recorded in the financial statements as provision established.
Provisions, contingent assets and contingent liabilities	s) Provisions, contingent assets and contingent liabilities Provisions are liabilities of uncertain timing or amount. Provisions are recognized in the Consolidated Statements of Financial Position when the Bank: i. has a present obligation (legal or constructive) as a result of past events, and ii. it is probable that an outflow of resources will be required to settle these obligations and the amount of these resources can be reliably measured. Contingent assets or contingent liabilities are any potential rights or obligations arising from past events whose existence will be confirmed only by the occurrence or non-occurrence if one or more uncertain future events that are not wholly within control of the Bank. The Consolidated Statements of Financial Position and annual accounts reflect all significant provisions for which it is estimated that it is probable an outflow of resources will be required to meet the obligation where the probability of having to meet the obligation is more likely than not. Provisions are quantified using the best available information on the consequences of the event giving rise to them and are reviewed and adjusted at the end of each year. Provisions must specify the liabilities for which they were originally recognized. Partial or total reversals are recognized when such liabilities cease to exist or are reduced. Provisions are classified according to the obligation covered as follows: - Provision for employee salaries and expenses - Provision for mandatory dividends - Provision for contingent credit risks - Provisions for contingencies
Deferred income taxes and other deferred taxes	t) Deferred income taxes and other deferred taxes The Bank records, when appropriate, deferred tax assets and liabilities for the estimated future tax effects attributable to differences between the carrying amount of assets and liabilities and their tax bases. The measurement of deferred tax assets and liabilities is based on the tax rate, in accordance with the applicable tax laws, using the tax rate that applies to the period when the deferred asset and liability will be settled. The future effects of changes in tax legislation or tax rates are recorded in deferred taxes beginning on the date on which the law is enacted or substantially enacted.
Use of estimates	u) Use of estimates The preparation of the financial statements requires the Bank’s management to make estimates and assumptions that affect the application of the accounting policies and the reported balances of assets, liabilities, revenues and expenses. Actual results may differ from these estimates. In certain cases, International Financial Reporting Standards (IFRS) require that assets or liabilities be recorded or disclosed at their fair values. The fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When available, quoted market prices in active markets have been used as the basis for measurement. When quoted market prices in active markets are not available, the Bank has estimated such values based on the best information available, including the use of modeling and other valuation techniques. The Bank has established allowances to cover credit losses. These allowances must be regularly reviewed taking into consideration factors such as changes in the nature and volume of the loan portfolio, trends in forecasted portfolio quality, credit quality and economic conditions that may adversely affect the borrowers’ ability to pay. Increases in the allowances for loan losses are reflected as “Provision for loan losses” in the Consolidated Statements of Income. Loans are charged-off when the Bank’s management determines that a loan or a portion thereof is impaired. Charge-offs are recorded as a reduction of the allowance for loan losses. The relevant estimates and assumptions made to calculate provisions are regularly reviewed by the Bank’s Management to quantify certain assets, liabilities, revenues, expenses, and commitments. These estimates, made on the basis of the best available information, mainly refer to: - Allowances for loan losses - Impairment losses of certain assets - The useful lives of tangible and intangible assets - The fair value of assets and liabilities - Commitments and contingencies - Current and deferred taxes
Non-current assets held for sale (in “Other Assets”)	v) Non-current assets held for sale (in “Other Assets”) The Bank classified its investment held on Redbanc, Transbank and Nexus, previously classified as associated, as assets held for sale in Other Assets, in accordance with IFRS 5 “Non-current Assets held for sale and discontinued operations”, since its carrying amount will be recovered principally through a sale transaction rather through continuing use. The Bank has ensured to comply with related requirement established in IFRS 5, which include: ● the assets are available for immediate sale in its present conditions and its sale must be highly probable. ● for the sale to be highly probable, the appropriate level of management is committed to a plan to sell the asset, and an active program to locate a buyer and complete the plan. ● additionally, the sale should be expected to qualify for recognition as a completed sale within one year from the date of classification. The Bank has measured their investment on the mentioned associated investment at their carrying amount since it represents the lower between carrying amount and fair value less cost to sell. Additionally, the Bank will recognize an impairment loss for any initial or subsequent write-down of the asset to fair value less costs to sell, to the extent that it has not been recognized. Events or circumstances may extend the period to complete the sale beyond one year. An extension of the period required to complete a sale does not preclude an asset from being classified as held for sale if the delay is caused by events or circumstances beyond the entity’s control and there is sufficient evidence that the entity remains committed to its plan to sell the asset. As of December 31, 2020, the Bank has sold its investment in Nexus, while held its investment on Transbank and Redbanc (classified as held for sale), mainly to circumstances raised that were previously considered unlikely, such as social unrest and pandemic, and the consequent health and economic crisis. However, the Bank continues committed to its selling plan and its acquiring network development plan, as evidenced by the recent creation of a payment card operating company and the active search for potential buyers Assets received or awarded in lieu of payment Assets received or awarded in lieu of payment of loans and accounts receivable from clients are recognized at their fair value (as determined by an independent appraisal). A price is agreed upon by the parties through negotiation or, when the parties do not reach an agreement, at the amount at which the Bank is awarded those assets at a judicial auction. In the both cases, an independent appraisal is performed. The excess of the outstanding loan balance over the fair value is charged to net income for the period, under “Provision for loan losses”. Any excess of the fair value over the outstanding loan balance, less costs to sell of the collateral, is returned to the client. These assets are subsequently adjusted to their net realizable value less cost to sale (assuming a forced sale). The difference between the carrying value of the asset and the estimated fair value less costs to sell is charged to net income for the period, under “Other operating expenses”. The result obtained in the sale of the asset is subsequently recorded under “Other operating income”. Independent appraisals are obtained at least every 18 months and fair values are adjusted accordingly. No adjustments have been made between appraisals with respect to the period covered by these financial statements considering the stability of the real estate market in Chile during past years and expected stability of the real estate market in the coming years. At least once a year, the Bank performs the necessary analysis to update the “cost to sale” of assets received or awarded in lieu of payments. According to the Bank’s survey, as of December 31, 2020 the average cost to sale was estimated at 3.2% of the appraisal value (3.1% as of December 31, 2019).
Earnings per share	w) Earnings per share Basic earnings per share are determined by dividing the net income attributable to the shareholders of the Bank for the reported period by the weighted average number of shares outstanding during the reported period. Diluted earnings per share are determined in the same way as basic earnings, but the weighted average number of outstanding shares is adjusted to take into consideration the potential diluting effect of stock options, warrants, and convertible debt. As of December 31, 2020, and 2019 the Bank did not have any instruments that generated dilution.
Temporary acquisition (assignment) of assets and liabilities	x) Temporary acquisition (assignment) of assets and liabilities Purchases or sales of financial assets under non-optional repurchase agreements at a fixed price are recorded in the Consolidated Statements of Financial Position based on the nature of the debtor (creditor) under “Deposits in the Central Bank of Chile,” “Deposits in financial institutions” or “Loans and accounts receivable from customers” (“Central Bank of Chile deposits,” “Deposits from financial institutions” or “Customer deposits”), in Note 7. Differences between the purchase and sale prices are recorded as financial interest over the term of the contract.
Provision for mandatory dividends	y) Provision for mandatory dividends As of December 31, 2020 and 2019 the Bank recorded a provision for mandatory dividends. This provision is made pursuant to Article 79 of the Corporations Act, which is in accordance with the Bank’s internal policy, pursuant to which at least 30% of net income for the period is distributed, except in the case of a contrary resolution adopted at the respective shareholders’ meeting by unanimous vote of the outstanding shares. This provision is recorded, as a deducting item, under the “Retained earnings – provision for mandatory dividends” line of the Consolidated Statements of Changes in Equity with offset to Provisions. i. Post-employment benefits – Defined Benefit Plan: According to current collective labor agreements and other agreements, the Bank has an additional benefit available to its principal executives, consisting of a pension plan whose purpose is to endow them with funds for a better supplementary pension upon their retirement. Features of the Plan: The main features of the Post-Employment Benefits Plan promoted by the Banco Santander-Chile are: a. Aimed at the Bank’s management. b. The general requirement to apply for this benefit is that the employee must be carrying out his/her duties when turning 60 years old. c. The Bank will create a pension fund, with life insurance, for each beneficiary in the plan. Periodic contributions into this fund are made by the manager and matched by the Bank. d. The Bank will be responsible for granting the benefits directly. The Bank uses the method of projected unit credit, to determine the present value of the defined benefit obligation and the current service cost. Components of defined benefit cost include: - current service cost and any past service cost, which are recognized in profit or loss for the period; - net interest on the liability (asset) for net defined benefit, which is recognized in profit or loss for the period; - new liability (asset) remeasurements for net defined benefit include: (a) actuarial gains and losses; (b) the difference between the actual return on plan assets and the interest on plan assets included in the net interest component and; (c) changes in the effect of the asset ceiling. The liability (asset) for net defined benefit is the deficit or surplus, determined as the difference between the present value of the defined benefit obligation less the fair value of plan assets. Plan assets comprise the pension fund taken out by the Group with a third party that is not a related party. These assets are held by an entity legally separated from the Bank and exist solely to pay benefits to employees. The Bank recognizes the present service cost and the net interest of the Personnel salaries and expenses on the Consolidated Statements of Income. The post-employment benefits liability, recognized in the Consolidated Statements of Financial Position represents the deficit or surplus in the defined benefit plans of the Bank. Any surplus resulting from the calculation is limited to the present value of any economic benefits available in the form of refunds from the plan or reductions in future contributions. When employees leave the plan before meeting the requirements to be eligible for the benefit, contributions made by the Bank are reduced. ii. Cash-settled share-based compensation The Bank allocates cash-settled share-based compensation to executives of the Bank and its Subsidiaries in accordance with IFRS 2. The Bank measures the services received and the obligation incurred at fair value. Until the obligation is settled, the Bank determines the fair value at the end of each reporting period, as well as at the date of settlement, recognizing any change in fair value in the income statements of the period.
Application of new and revised International Financial Reporting Standards	z) Application of new and revised International Financial Reporting Standards 1. New and revised standards effective in current year The following new and revised IFRS have been adopted in these financial statements: Conceptual Framework for Financial Reporting 2018 The implementation of this standard does not have a material impact on the Bank’s financial statement. Amendments to IFRS 3 – Definition of a Business. ● clarify that to be considered a business, an acquired set of activities and assets must include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create outputs; ● narrow the definitions of a business and of outputs by focusing on goods and services provided to customers and by removing the reference to an ability to reduce costs; ● add guidance and illustrative examples to help entities assess whether a substantive process has been acquired; ● remove the assessment of whether market participants are capable of replacing any missing inputs or processes and continuing to produce outputs; and ● add an optional concentration test that permits a simplified assessment of whether an acquired set of activities and assets is not a business The amendments are effective for business combinations for which the acquisition date is on or after the periods beginning of the first annual reporting period beginning on or after January 1, 2020, and to asset acquisitions that occur on or after the beginning of that report. Early application is permitted. The implementation of this standard does not have a material impact on the Bank’s financial statement. Amendments to IAS 1 and IAS 8- Definition of material The implementation of this standard did not have a material impact on the Bank’s financial statement. Amendments to IFRS 9, IAS 39 and IFRS 7 – Interest Rate benchmark Reform The amendments did not have a material impact on the consolidated financial statements of the Bank. Amendments to IFRS 16 – COVID-19 Related Rent Concessions 1. provide lessees with an exemption from assessing whether a COVID-19 related rent concession is a lease modification; 2. require lessees that apply the exemption to account for COVID-19 related rent concessions as if they were not lease modifications; 3. require lessees that apply the exemption to disclose that fact; and 4. require lessees to apply the exemption retrospectively in accordance with IAS 8, but do not require them to restate prior period figures. The amendment is effective for annual reporting periods beginning on or after June 1, 2020. Earlier application is permitted, including in financial statements not yet authorized for issue at May 28, 2020. The amendments did not have a material impact on the consolidated financial statements of the Bank. 2. New and revised IFRS issued but not effective As of the closing date of these financial statements, new International Financial Reporting Standards had been published as well as interpretations of them, which were not mandatory as of December 31, 2020. Although in some cases the early application is permitted by the IASB, the Bank has not taken that option. Amendments to IFRS 10 and IAS 28 - Sale or Contributions of Assets between an Investor and its Associate or Joint Venture. ● requires full recognition in the investor’s financial statements of gains and losses arising on the sale or contribution of assets that constitute a business (as defined in IFRS 3 Business Combinations); ● requires the partial recognition of gains and losses where the assets do not constitute a business, i.e. a gain or loss is recognized only to the extent of the unrelated investors’ interests in that associate or joint venture. On December 17, 2015 the IASB has published final amendments to “Sale or Contribution of Assets between an Investor and its Associate or Joint Venture”. The amendments defer the effective date of the September 2014 amendments to these standards indefinitely until the research project on the equity method has been concluded. The Bank’s management has considered that these amendments will not have a material impact on the consolidated financial statements of the Bank. Amendments to IAS 1 - Classification of liabilities as current or non-current ● clarify that the classification of liabilities should be based on rights that are in existence at the end of the reporting period and align the wording in all affected paragraphs to refer to the “right” to defer settlement by at least twelve months and make explicit that only rights in place “at the end of the reporting period” should affect the classification of a liability; ● clarify that classification is unaffected by expectations about whether an entity will exercise its right to defer settlement of a liability; and ● make clear that settlement refers to the transfer to the counterparty of cash, equity instruments, other assets or services. The amendments are effective for annual reporting periods beginning on or after January 1, 2023 and are to be applied retrospectively. Earlier application is permitted. The Bank’s management is evaluating the potential impact of this standards on the consolidated financial statements of the Bank. Annual Improvements to IFRS Standards 2018–2020. 1. IFRS 1 First-time Adoption of International Financial Reporting Standards 2. IFRS 9 Financial Instruments 3. IFRS 16 Leases 4. IAS 41 Agriculture The amendments to IFRS 1, IFRS 9, and IAS 41 are effective for annual periods beginning on or after January 1, 2022. Early application is permitted. The amendment to IFRS 16 only regards an illustrative example, so no effective date is stated. The Bank’s management is evaluating the potential impact of this standards. Amendments to IAS 16 Property, Plant and Equipment — Proceeds before Intended Use. The Bank’s management is evaluating the potential impact of this standards. Amendments to IAS 37 Onerous Contracts — Cost of Fulfilling a Contract The Bank’s management is evaluating the potential impact of this standards. Amendments to IFRS 3 - Reference to the Conceptual Framework ● update IFRS 3 so that it refers to the 2018 Conceptual Framework instead of the 1989 Framework; ● add to IFRS 3 a requirement that, for transactions and other events within the scope of IAS 37 or IFRIC 21, an acquirer applies IAS 37 or IFRIC 21 (instead of the Conceptual Framework) to identify the liabilities it has assumed in a business combination; and ● add to IFRS 3 an explicit statement that an acquirer does not recognize contingent assets acquired in a business combination. The amendments are effective for annual periods beginning on or after January 1, 2022. Early application is permitted if an entity also applies all other updated references (published together with the updated Conceptual Framework) at the same time or earlier. The Bank’s management is evaluating the potential impact of this standards. Interest rate benchmark reform - phase 2 The amendments complement those issued in 2019 and focus on the effects on financial statements when a company replaces the old interest rate benchmark with an alternative benchmark rate as a result of the reform. The amendments in this final phase relate to: ● changes to contractual cash flows—a company will not have to derecognize or adjust the carrying amount of financial instruments for changes required by the reform, but will instead update the effective interest rate to reflect the change to the alternative benchmark rate; ● hedge accounting—a company will not have to discontinue its hedge accounting solely because it makes changes required by the reform, if the hedge meets other hedge accounting criteria; and ● disclosures—a company will be required to disclose information about new risks arising from the reform and how it manages the transition to alternative benchmark rates. These amendments are effective for annual reporting periods beginning on or after January 1, 2021, with early adoption permitted. The Bank has not early adopted these standards; however it is conducting a process for the discontinuation of the IBOR benchmark. The Bank does not expect to have a significant impact on the adoption of this standard. See more details in Note N°37 Risk management. Accounting changes The Company changed the manner in which it accounts for leases in 2019, by adopting IFRS 16 starting January 1 of 2019. In addition they changed the manner in which it accounts for financial instruments in 2018, by adopting IFRS 9 starting January 1, 2018.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of significant accounting policies [text block] [Abstract]
Schedule of subsidiaries	The following companies are considered entities controlled by the Bank and are therefore within the scope of consolidation: Name of the Subsidiary Percent ownership share As of December 31, Place of Incorporation and operation 2020 2019 2018 Direct Indirect Total Direct Indirect Total Direct Indirect Total Main Activity % % % % % % % % % Santander Corredora de Seguros Limitada Insurance brokerage Santiago, Chile 99.75 0.01 99.76 99.75 0.01 99.76 99.75 0.01 99.76 Santander Corredores de Bolsa Limitada Financial instruments brokerage Santiago, Chile 50.59 0.41 51.00 50.59 0.41 51.00 50.59 0.41 51.00 Santander Asesorias Financieras Limitada (1) Securities brokerage Santiago, Chile 99.03 - 99.03 99.03 - 99.03 99.03 - 99.03 Santander S.A. Sociedad Securitizadora Purchase of credits and issuance of debt instruments Santiago, Chile 99.64 - 99.64 99.64 - 99.64 99.64 - 99.64 Klare Corredora de Seguros S.A. (2) Insurance brokerage Santiago, Chile 50.10 - 50.10 50.10 - 50.10 - - - Santander Consumer Chile S.A. (3) Financing Santiago, Chile 51.00 - 51.00 51.00 - 51.00 - - - Sociedad operadora de Tarjetas de Pago Santander Getnet Chile S.A. (4) Card operator Santiago, Chile 99.99 0.01 100.00 - - - - - - (1) On December 18, 2019, Santander Agente de Valores Limitada changed its business name and the company’s object, to Santander Asesorías Financieras Limitada, and offering financial advice. (2) On October 19, 2019 Klare Corredora de Seguros S.A. was created as a digital insurance brokerage and supporting banking business company and thus is subject to banking regulations. The Banks owns the 50,10% of the company’s capital share. (3) On November 15, 2019, Financial Market Commission (FMC) authorized Banco Santander to acquire the 51% of the Santander Consumer Chile S.A. capital share from SK Berge (49%) and Banco Santander S.A. (2%). The sale was completed on November 27, 2019. (4) On July 6, 2020, Banco Santander registered as a new subsidiary and business support company named “Sociedad Operadora de Tarjeta de Pago Santander Getnet Chile S.A”.
Schedule of associates	The following companies are considered “Associates” in which the Bank accounts for its participation using the equity method: Percentage of ownership share As of December 31, Place of 2020 2019 2018 Associates Main activity Incorporation and % % % operation Redbanc S.A. (*) ATM services Santiago, Chile - - 33.43 Transbank S.A. (*) Debit and credit card services Santiago, Chile - - 25.00 Centro de Compensación Automatizado Electronic fund transfer and compensation services Santiago, Chile 33.33 33.33 33.33 Sociedad Interbancaria de Depósito de Valores S.A. Delivery of securities on public offer Santiago, Chile 29.29 29.29 29.29 Cámara Compensación de Alto Valor S.A. Payments clearing Santiago, Chile 15.00 15.00 15.00 Administrador Financiero del Transantiago S.A. Administration of boarding passes to public transportation Santiago, Chile 20.00 20.00 20.00 Sociedad Nexus S.A. (*) Credit card processor Santiago, Chile - - 12.90 Servicios de Infraestructura de Mercado OTC S.A. Administration of the infrastructure for the financial market of derivative instruments Santiago, Chile 12.48 12.48 12.48 (*) The Bank is in process to sell its share participation on Redbanc S.A. and Transbank S.A. therefore it has been classified in accordance to IFRS 5 “Non-current Assets Held for Sale and Discontinued Operations” as investment available for sale. Otherwise its share participation in Nexus S.A., has been sold. See Note N°38.
Schedule of useful lives for the tangible assets	ITEM Useful life (Months) Land - Paintings and works of art - Carpets and curtains 36 Computers and hardware 36 Vehicles 36 IT systems and software 36 ATMs 60 Other machines and equipment 60 Office furniture 60 Telephone and communication systems 60 Security systems 60 Rights over telephone lines 60 Air conditioning systems 84 Other installations 120 Buildings 1,200
Schedule of loan and accounts receivable charge-offs	Loan and accounts receivable write-offs are recorded for overdue and current installments based on the time periods expired since reaching overdue status, as described below: Type of loan Term Consumer loans with or without collateral 6 months Other transactions without collateral 24 months Commercial loans with collateral 36 months Mortgage loans 48 months Consumer leasing 6 months Other non-mortgage leasing transactions 12 months Mortgage leasing (household and business) 36 months Type of loan Term Consumer loans with or without collateral 6 months Other transactions without collateral 24 months Commercial loans with collateral 36 months Mortgage loans 48 months Consumer leasing 6 months Other non-mortgage leasing transactions 12 months Mortgage leasing (household and business) 36 months

Significant Events (Tables)

Significant Events (Tables)	12 Months Ended
	Dec. 31, 2020
Significant Events Explanatory [Abstract]
Schedule of senior bonds	Series Currency Term Issuance Issuance Amount Maturity Bonos USD USD 5 years 2.70% 01-07-2020 750,000,000 01-07-2025 Total USD 750,000,000 Series Currency Term Issuance rate (annual) Issuance Amount Maturity Bonos USD USD 10 years 3.79% 01-21-2020 200,000,000 01-21-2030 Total USD 200,000,000 USTDW20320 UF 15 years and 3 months 3.50% 03-01-2020 5,000,000 09-01-2035 Total UF 5,000,000

Reporting Segments (Tables)

Reporting Segments (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of entity's operating segments [text block] [Abstract]
Schedule of reporting segment	For the year ended December 31, 2020 Loans and Net interest income Net fee and commission income Financial transactions, Expected Support expenses (3) Segment’s MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Retail Banking 24,279,248 1,049,543 213,431 28,577 (317,050) (596,464) 378,038 Middle-market 8,136,402 346,225 38,335 21,859 (109,999) (91,132) 205,287 CIB 1,635,217 114,229 23,180 82,303 (51,097) (72,715) 95,900 Other 289,026 83,851 (7,668) 17,058 (118) (8,235) 84,888 Total 34,339,893 1,593,848 267,278 149,797 (478,264) (768,546) 764,113 Other operating income 8,206 Other operating expenses and impairment (78,444) Income from investments in associates and other companies 1,388 Income tax expense (142,533) Result of continuing operations 552,730 Result of discontinued operations - Net income for the year 552,730 For the year ended December 31, 2019 Loans and accounts receivable at amortized cost (1) Net interest income Net fee and commission income Financial transactions, net (2) Expected Support expenses (3) Segment’s MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Retail Banking 22,926,377 960,361 230,627 28,426 (279,969) (575,511) 363,934 Middle-market 8,093,496 298,587 38,712 13,535 (38,746) (97,054) 215,034 CIB 1,603,633 98,154 29,103 94,761 223 (65,343) 156,898 Other 48,009 59,862 (11,356) 64,970 (4,819) (11,953) 96,704 Total 32,671,515 1,416,964 287,086 201,692 (323,311) (749,861) 832,570 Other operating income 13,001 Other operating expenses and impairment (52,029) Income from investments in associates and other companies 1,146 Income tax expense (175,074) Result of continuing operations 619,614 Result of discontinued operations 1,699 Net income for the year 621,313 For the year ended December 31, 2018 Loans and accounts receivable at amortized cost (1) Net interest income Net fee and commission income Financial transactions, net (2) Expected Support expenses (3) Segment’s MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Retail Banking 20,786,637 949,764 220,532 19,694 (287,739) (553,157) 349,094 Middle-market 7,690,380 272,912 36,746 16,848 (26,314) (92,377) 207,815 CIB 1,613,088 96,722 35,064 57,340 2,339 (64,913) 126,552 Other 123,310 94,970 (1,457) 11,200 (5,694) (11,486) 87,533 Total 30,213,415 1,414,368 290,885 105,082 (317,408) (721,933) 770,994 Other operating income 23,129 Other operating expenses and impairment (32,381) Income from investments in associates and other companies 1,325 Income tax expense (167,144) Result of continuing operations 595,923 Result of discontinued operations 3,770 Net income for the year 599,693 (1) Corresponds to loans and accounts receivable at amortized cost under IFRS 9, without deducting their allowances for loan losses. (2) Corresponds to the sum of the net income from financial operations and the foreign exchange profit or loss. (3) Corresponds to the sum of personnel salaries and expenses, administrative expenses, depreciation and amortization.

Cash and Cash Equivalents (Tabl

Cash and Cash Equivalents (Tables)	12 Months Ended
	Dec. 31, 2020
Cash and cash equivalents [abstract]
Schedule of cash and cash equivalents	As of December 31, 2020 2019 Cash and deposits in banks Cash 665,397 861,178 Deposits at the Central Bank of Chile 1,313,394 1,731,079 Deposits in local banks 1,571 948 Deposits in banks abroad 822,926 961,315 Subtotals – Cash and deposits in banks 2,803,288 3,554,520 Net cash items in process of collection 91,332 156,814 Cash and cash equivalents 2,894,620 3,711,334
Schedule of cash in process of collection and in process	As of December 31, 2020 2019 Assets Documents held by other banks (documents to be cleared) 137,396 217,394 Funds receivable 315,567 137,668 Subtotal 452,963 355,062 Liabilities Funds payable 361,631 198,248 Subtotal 361,631 198,248 Cash in process of collection, net 91,332 156,814

Financial Assets Held for Tra_2

Financial Assets Held for Trading (Tables)	12 Months Ended
	Dec. 31, 2020
Financial Assets Held For Trading Trading Investments Explanatory [Abstract]
Schedule of instruments deemed as financial trading investments	As of December 31, 2020 2019 MCh$ MCh$ Chilean Central Bank and Government securities Chilean Central Bank Bonds 419 1,952 Chilean Central Bank Notes - - Other Chilean Central Bank and Government securities 131,827 268,252 Subtotal 132,246 270,204 Other Chilean securities Time deposits in Chilean financial institutions - - Mortgage finance bonds of Chilean financial institutions - - Chilean financial institution bonds - - Chilean corporate bonds 1,472 - Other Chilean securities - - Subtotal 1,472 - Foreign financial securities Foreign Central Banks and Government securities - - Other foreign financial instruments - - Subtotal - Investments in mutual funds Funds managed by related entities - - Funds managed by others - - Subtotal - - Total 133,718 270,204

Investments under Resale Agre_2

Investments under Resale Agreements and Obligations under Repurchase Agreements (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of repurchase and reverse repurchase agreements [text block] [Abstract]
Schedule of selling financial instruments	As of December 31, 2020 2019 From 1 day More than 3 More than Total From 1 day More than 3 More Total MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Securities from Chilean Government and the Chilean Central Bank: Chilean Central Bank Bonds - - - - - - - - Chilean Central Bank Notes 461.961 - - 461.961 - - - - Other securities from the Government and the Chilean Central Bank 507.448 - - 507.448 379,891 33 - 379,924 Subtotal 969.409 - - 969.409 379,891 33 - 379,924 Instruments from other domestic institutions: Time deposits in Chilean financial institutions 399 - - 399 127 4 - 131 Subtotal 399 - - 399 127 4 - 131 Instruments from other foreign institutions: Securities from Government or foreign Central Banks - - - - - - - - Subtotal - - - - Total 969,808 - - 969,808 380,018 37 - 380,055
Schedule of portfolio of collateral associated with repurchase agreements at fair value	As of December 31, 2020 2019 Debt Financial Total Debt Financial Total MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Chilean Central Bank and Government securities: Chilean Central Bank Bonds - - - - - - Chilean Central Bank Notes 461,965 - 461,965 - - - Other securities from the Government and the Chilean Central Bank 507,543 - 507,543 379,924 - 379,924 Subtotal 969,508 - 969,508 379,924 - 379,924 Other Chilean securities: Time deposits in Chilean financial institutions 399 - 399 131 - 131 Subtotal 399 - 399 131 - 131 Instruments from other foreign institutions: Securities from Government or foreign Central Banks - - - - - - Subtotal - - - - - - Total 969,907 969,907 380,055 - 380,055

Derivative Financial Instrume_2

Derivative Financial Instruments and Hedge Accounting (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of derivative financial instruments [text block] [Abstract]
Schedule of portfolio of derivative instruments	As of December 31, 2020 Notional amount Fair value Up to 3 More than 3 More than Total Assets Liabilities MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Fair value hedge derivatives Interest rate swaps 50,000 410,687 5,064,113 5,524,800 33,816 83,666 Cross currency swaps 317,400 601,987 5,634,700 6,554,087 294,562 178,529 Subtotal 367,400 1,012,674 10,698,813 12,078,887 328,378 262,195 Cash flow hedge derivatives Currency forwards 2,121,326 503,280 601,582 3,226,188 2,985 3,556 Cross currency swaps 424,358 498,373 9,777,491 10,700,222 35,902 183,386 Subtotal 2,545,684 1,001,653 10,379,073 13,926,410 38,887 186,942 Trading derivatives Currency forwards 22,729,787 12,175,074 8,215,576 43,120,437 1,085,327 1,158,904 Interest rate swaps 14,006,503 22,118,742 97,803,009 133,928,254 3,651,651 3,588,912 Cross currency swaps 6,719,065 15,138,056 138,352,345 160,209,466 3,921,440 3,819,446 Call currency options 129,339 31,641 57,581 218,561 1,527 909 Put currency options 112,145 16,173 58,276 186,594 4,875 1,352 Subtotal 43,696,839 49,479,686 244,486,787 337,663,312 8,664,820 8,569,523 Total 46,609,923 51,494,013 265,564,673 363,668,609 9,032,085 9,018,660 As of December 31, 2019 Notional amount Fair value Up to 3 More than 3 More than Total Assets Liabilities MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Fair value hedge derivatives Interest rate swaps 381,638 317,610 1,847,138 2,546,386 39,460 34,264 Cross currency swaps 407,008 863,984 13,357,058 14,628,050 226,870 295,281 Subtotal 788,646 1,181,594 15,204,196 17,174,436 266,330 329,545 Cash flow hedge derivatives Currency forwards 99,105 1,018,656 768,256 1,886,017 4,131 3,505 Cross currency swaps 2,266,907 1,938,222 10,848,233 15,053,362 106,413 43,183 Subtotal 2,366,012 2,956,878 11,616,489 16,939,379 110,544 46,688 Trading derivatives Currency forwards 28,472,586 18,508,702 7,679,464 54,660,752 1,023,683 1,137,496 Interest rate swaps 16,678,487 40,892,909 89,109,046 146,680,442 2,465,235 2,270,686 Cross currency swaps 7,726,724 20,457,463 113,206,678 141,390,865 4,277,450 3,605,516 Call currency options 17,971 47,012 81,804 146,787 5,176 240 Put currency options 16,409 41,872 80,655 138,936 190 483 Subtotal 52,912,177 79,947,958 210,157,647 343,017,782 7,771,734 7,014,421 Total 56,066,835 84,086,430 236,978,332 377,131,597 8,148,608 7,390,654
Schedule of fair value hedges	As of December 31, 2020 Within 1 year Between 1 and Between 3 and Over 6 years Total MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Debt instruments at FVOCI Chilean sovereign bonds 10,687 10,687 138,044 249,440 408,858 Mortgage financing bonds - 918 - - 918 US Treasury bonds - - 178,118 - 178,118 Time deposits and other time liabilities Time deposits 58,238 58,217 - - 116,455 Issued debt instruments Senior bonds 88,023 801,349 2,112,831 1,220,521 4,222,724 Subordinated bonds - - 249,363 142,494 391,857 Interbank borrowing Chilean Central Bank loans - - 3,865,000 - 3,865,000 Total 156,948 871,171 6,543,356 1,612,455 9,183,930 Hedging instrument Cross currency swaps 96,261 835,484 2,056,864 1,220,521 4,209,130 Interest rate swaps 60,687 35,687 4,486,492 391,934 4,974,800 Total 156,948 871,171 6,543,356 1,612,455 9,183,930 As of December 31, 2019 Within 1 year Between 1 and 3 years Between 3 and 6 years Over 6 years Total MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Debt instruments at FVOCI Chilean sovereign bonds - - 5,605 394,690 400,295 Mortgage financing bonds - 2,728 - - 2,728 US Treasury bonds - - 149,474 37,369 186,843 Chilean Treasury bonds - 289,369 - - 289,369 Chilean Central Bank bonds - 254,685 - - 254,685 Time deposits and other time liabilities Time deposits 685,259 281,921 225,515 - 1,192,695 Issued debt instruments Senior bonds 651,681 1,133,698 2,253,892 3,324,100 7,363,371 Total 1,336,940 1,962,401 2,634,486 3,756,158 9,689,985 Hedging instrument Cross currency swaps 637,692 1,602,401 2,229,407 3,324,099 7,793,599 Interest rate swaps 699,248 360,000 405,079 432,059 1,896,386 Total 1,336,940 1,962,401 2,634,486 3,756,158 9,689,985
Schedule of notional amount of the hedged	As of December 31, 2020 Within 1 Between 1 and Between 3 and Over 6 Total MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Loans and accounts receivable at amortized cost Mortgage loans 1,926,918 2,520,951 2,761,742 2,084,180 9,293,791 Debt instruments at FVOCI Chilean sovereign bonds - - 42,532 - 42,532 Chilean Treasury bonds - 175,875 891,791 196,428 1,264,094 Issued debt instruments Senior bonds (variable rate) 167,430 - - - 167,430 Senior bonds (fixed rate) 1,125,253 610,385 643,700 415,865 2,795,203 Interbank borrowings Interbank loans 327,736 35,624 - - 363,360 Total 3,547,337 3,342,835 4,339,765 2,696,473 13,926,410 Hedging instrument Cross currency swaps 922,731 2,741,253 4,339,765 2,696,473 10,700,222 Currency forwards 2,624,606 601,582 - - 3,226,188 Total 3,547,337 3,342,835 4,339,765 2,696,473 13,926,410 As of December 31, 2019 Within 1 Between 1 and Between 3 and Over 6 Total MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Loans and accounts receivable at amortized cost Mortgage loans 3,334,734 1,505,595 1,995,156 3,136,962 9,972,447 Commercial loans - - - - - Debt instruments at FVOCI Chilean sovereign bonds - - - - - Chilean Central Bank bonds - - 82,727 - 82,727 Time deposits - - 267,286 225,981 493,267 Time deposits and other time liabilities Time deposits - - - - - Issued debt instruments Senior bonds (variable rate) 358,118 341,283 - - 699,401 Senior bonds (fixed rate) 803,596 1,696,595 1,152,461 1,069,511 4,722,163 Interbank borrowings Interbank loans 826,442 142,932 - - 969,374 Total 5,322,890 3,686,405 3,497,630 4,432,454 16,939,379 Hedging instrument Cross currency swaps 4,205,129 2,918,149 3,497,630 4,432,454 15,053,362 Currency forwards 1,117,761 768,256 - - 1,886,017 Total 5,322,890 3,686,405 3,497,630 4,432,454 16,939,379
Schedule of forecasted cash flows for interest rate risk	As of December 31, 2020 Within 1 Between 1 and 3 Between 3 and 6 Over 6 years Total MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Inflows 18,219 2,284 2,512 - 23,015 Outflows (90,303) (123,604) (104,198) (83,397) (401,502) Net flows (72,084) (121,320) (101,686) (83,397) (378,487) Hedging instrument Inflows 90,303 123,604 104,198 83,397 401,502 Outflows (*) (18,219) (2,284) (2,512) - (23,015) Net flows 72,084 121,320 101,686 83,397 378,487 As of December 31, 2019 Within 1 year Between 1 and Between 3 and 6 Over 6 years Total MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Inflows 25,328 10,220 217 - 35,765 Outflows (356,683) (245,480) (154,689) (163,151) (920,003) Net flows (331,355) (235,260) (154,472) (163,151) (884,238) Hedging instrument Inflows 356,683 245,480 154,689 163,151 920,003 Outflows (*) (25,328) (10,220) (217) - (35,765) Net flows 331,355 235,260 154,472 163,151 884,238
Schedule of forecasted cash flows for inflation risk	As of December 31, 2020 Within 1 year Between 1 and Between 3 and Over 6 years Total MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Inflows 114,734 257,698 457,046 406,499 1,235,977 Outflows (32,238) (19,702) (55,388) (26,993) (134,321) Net flows 82,496 237,996 401,658 379,506 1,101,656 Hedging instrument Inflows 32,238 19,702 55,388 26,993 134,321 Outflows (114,734) (257,698) (457,046) (406,499) (1,235,977) Net flows (82,496) (237,996) (401,658) (379,506) (1,101,656) As of December 31, 2019 Within Between 1 and Between 3 and Over 6 Total MCh$ MCh$ MCh$ MCh$ MCh$ Hedged item Inflows 74,574 109,486 216,972 422,362 823,394 Outflows (19,466) (50,151) (33,140) (52,880) (155,637) Net flows 55,108 59,335 183,832 369,482 667,757 Hedging instrument Inflows 19,466 50,151 33,140 52,880 155,637 Outflows (74,574) (109,486) (216,972) (422,362) (823,394) Net flows (55,108) (59,335) (183,832) (369,482) (667,757)
Schedule of market adjustment of cash flow hedges produced by hedge instruments	As of December 31, Hedged item 2020 2019 MCh$ MCh$ Interbank loans (962) (1,872) Issued debt instruments (6,990) (16,345) Debt instruments at FVOCI (25,833) (2,905) Loans and accounts receivable at amortized cost (102,980) (19,313) Total (136,765) (40,435)
Schedule of income generated by cash flow hedges amount that were reclassified from other comprehensive income to income	For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Bond hedging derivatives (3,149) (120) - Interbank loans hedging derivatives 1 (955) (683) Cash flow hedge net gain (loss) (3,148) (1,075) (683)
Schedule of macro-hedges	Notional amount As of December 31, 2020 Within 1 Between Between 3 Over 6 Total MCh$ MCh$ MCh$ MCh$ MCh$ Hedge item Loans and account receivable at amortized cost Mortgage loans 823,126 786,352 - 735,479 2,344,957 Commercial loans 400,000 150,000 - - 550,000 Total 1,223,126 936,352 - 735,479 2,894,957 Hedging instrument Cross currency swaps 823,126 786,352 - 735,479 2,344,957 Interest rate swaps 400,000 150,000 - - 550,000 Total 1,223,126 936,352 - 735,479 2,894,957 Notional amount As of December 31, 2019 Within 1 Between Between 3 Over 6 Total MCh$ MCh$ MCh$ MCh$ MCh$ Hedge item Loans and account receivable at amortized cost Mortgage loans 633,300 1,189,037 1,545,239 3,466,875 6,834,451 Commercial loans - 600,000 50,000 - 650,000 Total 633,300 1,789,037 1,595,239 3,466,875 7,484,451 Hedging instrument Cross currency swaps 633,300 1,189,037 1,545,239 3,466,875 6,834,451 Interest rate swaps - 600,000 50,000 - 650,000 Total 633,300 1,789,037 1,595,239 3,466,875 7,484,451

Loans and Accounts Receivable_3

Loans and Accounts Receivable at Amortized Cost (Tables)	12 Months Ended
	Dec. 31, 2020
Loans and Accounts Receivable at Amortized Cost (Tables) [Line Items]
Schedule of loan portfolio composition	Assets before allowances ECL allowance (*) As of December 31, 2020 Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total Net MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Commercial loans Interbank loans 18,930 - - 18,930 1 - - 1 18,929 Commercial loans 11,453,377 1,285,770 751,471 13,490,618 60,987 87,295 349,864 498,146 12,992,472 Foreign trade loans 979,014 221,074 39,183 1,239,271 5,323 2,786 33,152 41,261 1,198,010 Checking accounts debtors 92,789 21,315 11,506 125,610 1,253 1,524 8,825 11,602 114,008 Factoring transactions 486,587 7,207 3,885 497,679 1,397 387 2,345 4,129 493,550 Student loans 49,768 4,905 8,707 63,380 1,551 714 6,533 8,798 54,582 Leasing transactions 1.015.298 267.062 72.797 1.355.157 7,377 14,934 37,376 59,687 1,295,470 Other loans and account receivable 163.035 10.973 22.536 196.544 2,643 2,127 16,678 21,448 175,096 Subtotal 14.258.798 1.818.306 910.085 16.987.189 80,532 109,767 454,773 645,072 16,342,117 Mortgage loans Loans with mortgage finance bonds 6,859 546 404 7,809 16 11 57 84 7,725 Endorsable mortgage mutual loans 86,786 2,463 3,711 92,960 221 63 474 758 92,202 Other mortgage mutual loans 11,424,718 389,363 496,975 12,311,056 24,828 8,367 78,485 111,680 12,199,376 Subtotal 11,518,363 392,372 501,090 12,411,825 25,065 8,441 79,016 112,522 12,299,303 Consumer loans Installment consumer loans 3,221,617 211,348 255,627 3,688,592 76,140 26,737 152,639 255,516 3,433,076 Credit card balances 1,097,680 20,380 7,848 1,125,908 10,781 4,141 5,037 19,959 1,105,949 Leasing transactions 2,956 139 26 3,121 29 22 16 67 3,054 Other consumer loans 116,910 4,728 1,620 123,258 1,875 832 950 3,657 119,601 Subtotal 4,439,163 236,595 265,121 4,940,879 88,825 31,732 158,642 279,199 4,661,680 Total 30,216,324 2,447,273 1,676,296 34,339,893 194,422 149,940 692,431 1,036,793 33,303,100 Assets before allowances ECL allowance As of December 31, 2019 Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total Net MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Commercial loans Interbank loans 14,852 - - 14,852 1 - - 1 14,851 Commercial loans (*) 10,179,002 870,028 659,157 11,708,187 41,296 41,734 301,094 384,124 11,324,063 Foreign trade loans 1,519,757 155,324 38,552 1,713,633 4,113 705 23,569 28,387 1,685,246 Checking accounts debtors 166,771 16,108 14,014 196,893 1,492 764 9,644 11,900 184,993 Factoring transactions 478,465 7,946 2,989 489,400 1,158 234 1,904 3,296 486,104 Student loans 57,206 5,942 8,125 71,273 1,774 1,950 5,595 9,319 61,954 Leasing transactions 1,184,765 178,556 61,541 1,424,862 5,415 8,270 30,960 44,645 1,380,217 Other loans and account receivable 201,805 11,163 30,257 243,225 2,178 2,287 20,432 24,897 218,328 Subtotal 13,802,623 1,245,067 814,635 15,862,325 57,427 55,944 393,198 506,569 15,355,756 Mortgage loans Loans with mortgage finance bonds 10,774 744 780 12,298 13 21 103 137 12,161 Endorsable mortgage mutual loans 92,792 2,819 4,541 100,152 72 103 641 816 99,336 Other mortgage mutual loans 10,172,400 454,385 523,760 11,150,545 8,361 14,385 77,360 100,106 11,050,439 Subtotal 10,275,966 457,948 529,081 11,262,995 8,446 14,509 78,104 101,059 11,161,936 Consumer loans Installment consumer loans 3,378,489 270,347 268,700 3,917,536 51,289 45,102 158,670 255,061 3,662,475 Credit card balances 1,341,734 17,668 18,308 1,377,710 12,507 4,894 9,936 27,337 1,350,373 Leasing transactions 3,569 303 80 3,952 56 30 36 122 3,830 Other consumer loans 239,255 4,400 3,342 246,997 3,544 782 1,621 5,947 241,050 Subtotal 4,963,047 292,718 290,430 5,546,195 67,396 50,808 170,263 288,467 5,257,728 Total 29,041,636 1,995,733 1,634,146 32,671,515 133,269 121,261 641,565 896,095 31,775,420
Commerical Loans [Member]
Loans and Accounts Receivable at Amortized Cost (Tables) [Line Items]
Schedule of gross carrying amount expected credit loss	Stage1 Stage2 Stage3 TOTAL Individual Collective Individual Collective Individual Collective MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Gross carrying amount at 10,208,264 3,594,359 1,004,967 240,100 401,007 413,628 15,862,325 Transfers: Transfers from stage 1 to stage 2 (1,355,492) (277,926) 1,355,492 277,926 - - - Transfers from stage 1 to stage 3 (2,492) (52,304) - - 2,492 52,304 - Transfers from stage 2 to stage 3 - - (198,124) (163,049) 198,124 163,049 - Transfers from stage 2 to stage 1 239,349 162,768 (239,349) (162,768) - - - Transfers from stage 3 to stage 2 - - 4,022 117,446 (4,022) (117,446) - Transfers from stage 3 to stage 1 - 138 - - - (138) - Net changes of financial assets 676,413 1,056,882 (337,291) (80,505) (537) (29,882) 1,285,080 Write-off - - - - (66,989) (101,548) (168,537) FX and other adjustments (1,243) 10,082 (2) (559) (9) 52 8,321 At December 31, 2020 9,764,799 4,493,999 1,589,715 228,591 530,066 380,019 16,987,189 Stage 1 Stage 2 Stage 3 TOTAL Individual Collective Individual Collective Individual Collective MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ ECL allowance at January 1, 2020 21,539 35,888 30,389 25,555 196,165 197,033 506,569 Transfers Transfers to stage 2 (23,652) (16,137) 50,253 48,464 - - 58,928 Transfers to stage 3 (9) (3,007) - - 1,089 22,152 20,225 Transfers to stage 3 - - (25,214) (29,540) 73,885 55,645 74,776 Transfers to stage 1 2,919 4,921 (9,322) (20,605) - - (22,087) Transfers to stage 2 - - 943 4,424 (1,560) (22,995) (19,188) Transfers to stage 1 - 5 - - - (45) (40) Net changes of the exposure and modifications in credit risk 39,971 19,264 18,462 15,122 58,915 41,860 193,594 Write-off - - - - (66,989) (100,393) (167,382) FX and other adjustments (1,179) 9 (59) 895 - 11 (323) At December 31, 2020 39,589 40,943 65,452 44,315 261,505 193,268 645,072 Stage1 Stage2 Stage3 TOTAL Individual Collective Individual Collective Individual Collective MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Gross carrying amount at January 1, 2019(*) 9,695,837 3,644,407 867,783 235,239 386,929 387,265 15,217,460 Transfers: Transfers from stage 1 to stage 2 (518,990) (347,678) 518,990 347,678 - - - Transfers from stage 1 to stage 3 - (41,696) - - - 41,696 - Transfers from stage 2 to stage 3 - - (132,136) (230,125) 132,136 230,125 - Transfers from stage 2 to stage 1 158,935 159,009 (158,935) (159,009) - - - Transfers from stage 3 to stage 2 - - 11,229 120,293 (11,229) (120,293) - Transfers from stage 3 to stage 1 - 1,134 - - - (1,134) - Net changes of financial assets 542,311 415,524 (119,884) (68,960) (24,788) (31,945) 712,258 Write-off - - - - (83,845) (94,004) (177,849) FX and other adjustments 330,171 (236,341) 17,920 (5,016) 1,804 1,918 110,456 At December 31, 2019 10,208,264 3,594,359 1,004,967 240,100 401,007 413,628 15,862,325 Stage 1 Stage 2 Stage 3 TOTAL Individual Collective Individual Collective Individual Collective MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ ECL allowance at January 1, 2019(*) 30,189 44,104 31,066 24,945 198,115 179,771 508,190 Transfers Transfers to stage 2 (7,786) (20,058) 17,237 68,705 - - 58,098 Transfers to stage 3 - (2,666) - - - 16,087 13,421 Transfers to stage 3 - - (8,567) (42,601) 44,203 71,200 64,235 Transfers to stage 1 1,576 4,838 (7,525) (22,278) - - (23,389) Transfers to stage 2 - - 685 9,667 (3,867) (27,482) (20,997) Transfers to stage 1 - 88 - - - (242) (154) Net changes of the exposure and modifications in credit risk (6,948) 14,199 (3,151) (12,533) 41,365 54,962 87,894 Write-off - - - - (83,844) (94,014) (177,858) FX and other adjustments 4,508 (4,617) 644 (350) 193 (3,249) (2,871) At December 31, 2019 21,539 35,888 30,389 25,555 196,165 197,033 506,569
Residential Mortgage Loans [Member]
Loans and Accounts Receivable at Amortized Cost (Tables) [Line Items]
Schedule of gross carrying amount expected credit loss	Stage1 Stage2 Stage3 TOTAL Collective Collective Collective MCh$ MCh$ MCh$ MCh$ Gross carrying amount at January 1, 2020 10,275,966 457,948 529,081 11,262,995 Transfers: Transfers from stage 1 to stage 2 (248,167) 248,167 - - Transfers from stage 1 to stage 3 (53,621) - 53,621 - Transfers from stage 2 to stage 3 - (215,547) 215,547 - Transfers from stage 2 to stage 1 321,954 (321,954) - - Transfers from stage 3 to stage 2 - 248,635 (248,635) - Transfers from stage 3 to stage 1 463 - (463) - Net changes of financial assets 1,221,898 (25,440) (22,147) 1,174,311 Write-off - - (25,831) (25,831) FX and other adjustments (130) 563 (83) 350 At December 31, 2020 11,518,363 392,372 501,090 12,411,825 Stage 1 Stage 2 Stage 3 TOTAL Collective Collective Collective MCh$ MCh$ MCh$ MCh$ ECL allowance at January 1, 2020 8,446 14,509 78,104 101,059 Transfers Transfers from stage 1 to stage 2 (5,250) 12,502 - 7,252 Transfers from stage 1 to stage 3 (472) - 4,548 4,076 Transfers from stage 2 to stage 3 - (8,923) 20,034 11,111 Transfers from stage 2 to stage 1 3,187 (13,912) - (10,725) Transfers from stage 3 to stage 2 - 7,033 (28,146) (21,113) Transfers from stage 3 to stage 1 2 - (37) (35) Net changes of the exposure and modifications in credit risk 19,162 (2,791) 30,352 46,723 Write-off - - (25,831) (25,831) FX and other adjustments (10) 23 (8) 5 At December 31, 2020 25,065 8,441 79,016 112,522 Stage1 Stage2 Stage3 TOTAL Collective Collective Collective MCh$ MCh$ MCh$ MCh$ Gross carrying amount at January 1, 2019 9,258,962 447,496 444,523 10,150,981 Transfers: Transfers from stage 1 to stage 2 (481,646) 481,646 - - Transfers from stage 1 to stage 3 (60,329) - 60,329 - Transfers from stage 2 to stage 3 - (333,706) 333,706 - Transfers from stage 2 to stage 1 361,293 (361,293) - - Transfers from stage 3 to stage 2 - 250,896 (250,896) - Transfers from stage 3 to stage 1 2,338 - (2,338) - Net changes of financial assets 1,131,941 (35,200) (24,539) 1,072,202 Write-off - - (34,184) (34,184) FX and other adjustments 63,407 8,109 2,480 73,996 At December 31, 2019 10,275,966 457,948 529,081 11,262,995 Stage 1 Stage 2 Stage 3 TOTAL Collective Collective Collective MCh$ MCh$ MCh$ MCh$ ECL allowance at January 1, 2019 9,006 15,102 67,162 91,270 Transfers Transfers from stage 1 to stage 2 (3,318) 20,509 - 17,191 Transfers from stage 1 to stage 3 (311) - 5,994 5,683 Transfers from stage 2 to stage 3 - (12,598) 31,654 19,056 Transfers from stage 2 to stage 1 1,374 (13,849) - (12,475) Transfers from stage 3 to stage 2 - 8,341 (29,303) (20,962) Transfers from stage 3 to stage 1 6 - (193) (187) Net changes of the exposure and modifications in credit risk 1,655 (3,054) 32,561 31,162 Write-off - - (34,184) (34,184) FX and other adjustments 34 58 4,413 4,505 At December 31, 2019 8,446 14,509 78,104 101,059
Loans to consumers [member]
Loans and Accounts Receivable at Amortized Cost (Tables) [Line Items]
Schedule of gross carrying amount expected credit loss	Stage1 Stage2 Stage3 TOTAL Collective Collective Collective MCh$ MCh$ MCh$ MCh$ Gross carrying amount at January 1, 2020 4,963,047 292,718 290,430 5,546,195 Transfers: Transfers from stage 1 to stage 2 (410,942) 410,942 - - Transfers from stage 1 to stage 3 (16,962) - 16,962 - Transfers from stage 2 to stage 3 - (223,169) 223,169 - Transfers from stage 2 to stage 1 238,800 (238,800) - - Transfers from stage 3 to stage 2 - 57,574 (57,574) - Transfers from stage 3 to stage 1 2,225 - (2,225) - Net changes of financial assets (337,006) (62,658) 13,765 (385,899) Write-off - - (219,402) (219,402) FX and other adjustments 1 (12) (4) (15) At December 31, 2020 4,439,163 236,595 265,121 4,940,879 Stage 1 Stage 2 Stage 3 TOTAL Collective Collective Collective MCh$ MCh$ MCh$ MCh$ ECL allowance at January 1, 2020 67,396 50,808 170,263 288,467 Transfers: Transfers from stage 1 to stage 2 (36,422) 95,850 - 59,428 Transfers from stage 1 to stage 3 (1,484) - 9,061 7,577 Transfers from stage 2 to stage 3 - (75,229) 108,792 33,563 Transfers from stage 2 to stage 1 13,589 (41,928) - (28,339) Transfers from stage 3 to stage 2 - 10,162 (28,649) (18,487) Transfers from stage 3 to stage 1 254 - (865) (611) Net changes of the exposure and 45,492 (7,926) 104,328 141,894 Write-off - - (204,286) (204,286) FX and other adjustments - (5) (2) (7) At December 31, 2019 88,825 31,732 158,642 279,199 Stage1 Stage2 Stage3 TOTAL Collective Collective Collective MCh$ MCh$ MCh$ MCh$ Gross carrying amount at January 1, 2019(*) 4,727,464 295,132 300,193 5,322,789 Transfers: Transfers from stage 1 to stage 2 (358,403) 358,403 - - Transfers from stage 1 to stage 3 (25,210) - 25,210 - Transfers from stage 2 to stage 3 - (248,494) 248,494 - Transfers from stage 2 to stage 1 130,611 (130,611) - - Transfers from stage 3 to stage 2 - 56,489 (56,489) - Transfers from stage 3 to stage 1 514 - (514) - Net changes of financial assets 430,777 (45,093) (3,605) 382,079 Write-off - - (223,919) (223,919) FX and other adjustments 57,294 6,892 1,060 65,246 At December 31, 2019 4,963,047 292,718 290,430 5,546,195 Stage 1 Stage 2 Stage 3 TOTAL Collective Collective Collective MCh$ MCh$ MCh$ MCh$ ECL allowance at January 1, 2019 (*) 75,495 60,467 165,052 301,014 Transfers Transfers to stage 2 (28,717) 109,916 - 81,199 Transfers to stage 3 (1,633) - 11,699 10,066 Transfers to stage 3 - (78,909) 111,334 32,425 Transfers to stage 1 7,941 (32,506) - (24,565) Transfers to stage 2 - 17,002 (31,914) (14,912) Transfers to stage 1 47 - (233) (186) Net changes of the exposure and modifications in the credit risk 15,641 (25,712) 135,298 125,227 Write-off - - (223,919) (223,919) FX and other adjustments (1,378) 550 2,946 2,118 At December 31, 2019 67,396 50,808 170,263 288,467

Loans and Accounts Receivable_4

Loans and Accounts Receivable at Fair Value Through Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2020
Loans and Accounts Receivable at Fair Value Through Other Comprehensive Income [Abstract]
Schedule of gross carrying amount	Stage1 Stage2 Stage3 TOTAL Individual Individual Individual MCh$ MCh$ MCh$ MCh$ Gross carrying amount at January 1, 2020 66,166 - - 66,166 Transfers Transfers to stage 1 - - - - Transfers to stage 2 - - - - Transfers to stage 3 - - - - Net changes on financial assets 3,857 - - 3,857 Write-off - - - - FX and other adjustments 662 - - 662 At December 31, 2020 70,685 - - 70,685 Stage 1 Stage 2 Stage 3 TOTAL Individual Individual Individual MCh$ MCh$ MCh$ MCh$ ECL allowance at January 1, 2020 101 - - 101 Transfers Transfers to stage 1 - - - - Transfers to stage 2 - - - - Transfers to stage 3 - - - - Net changes of the exposure and modifications in the credit risk 1,252 - - 1,252 Write-off - - - - FX and other adjustments 1 - - 1 At December 31, 2020 1,354 1,354 Stage1 Stage2 Stage3 TOTAL Individual Individual Individual MCh$ MCh$ MCh$ MCh$ Gross carrying amount at January 1, 2019 63,745 4,949 - 68,694 Transfers Transfers to stage 1 - - - - Transfers to stage 2 - - - - Transfers to stage 3 - - - - Net changes on financial assets 1,428 (4,914) - (3,486) Write-off - - - - FX and other adjustments 993 (35) - 958 At December 31, 2019 66,166 - - 66,166 Stage 1 Stage 2 Stage 3 TOTAL Individual Individual Individual MCh$ MCh$ MCh$ MCh$ ECL allowance at January 1, 2019 88 18 - 106 Transfers Transfers to stage 1 - - - - Transfers to stage 2 - - - - Transfers to stage 3 - - - - Net changes of the exposure and 65 (18) - 47 Write-off - - - - FX and other adjustments (52) - - (52) At December 31, 2019 101 - - 101

Debt Instruments at Fair Valu_2

Debt Instruments at Fair Value Through Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2020
Debt Instruments at Fair Value Through Other Comprehensive Income (Tables) [Line Items]
Schedule of debt instrument	As of December 31, 2020 2019 MCh$ MCh$ Chilean central bank and government securities Chilean central bank bonds - 272,802 Chilean central bank notes 1,008,450 1,186,724 Other Chilean central bank and government securities (*) 5,344,910 1,908,031 Subtotal 6,353,360 3,367,557 of which sold under repurchase agreement 969,508 379,294 Other Chilean securities Time deposits in Chilean financial institutions 492 398 Mortgage finance bonds of Chilean financial institutions 14,022 16,748 Other instruments issued in the country 2,217 2,410 Subtotal 16,731 19,556 of which sold under repurchase agreement 399 131 Foreign financial securities Foreign Central Banks and Government securities 269,803 197,685 Other foreign financial securities 522,648 425,474 Subtotal 792,451 623,159 of which sold under repurchase agreement - - Total 7,162,542 4,010,272 (*) Includes Treasury bonds in Chilean pesos and UF.
Schedule of available for sale investments cumulative unrealized profit and loss	(*) Includes Treasury bonds in Chilean pesos and UF. Less than 12 months More than 12 months Total Amortized cost Fair value Unrealized profit Unrealized loss Amortized cost Fair value Unrealized profit Unrealized loss Amortized cost Fair value Unrealized profit Unrealized loss MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Chilean central bank and government securities Chilean central bank Bonds - - - - - - - - - - - - Chilean central bank notes 1,008,450 1,008,450 - - - - - - 1,008,450 1,008,450 - - Other Chilean central bank and government securities 5,288,189 5,344,910 96,180 (36,739) - - - - 5,288,189 5,344,910 96,180 (36,739) Subtotal 6,296,639 6,353,360 96,180 (36,739) - - - - 6,296,639 6,353,360 96,180 (36,739) Other Chilean securities Time deposits in Chilean financial institutions 299 299 - - - - - - 299 299 - - Mortgage finance bonds of Chilean financial institutions 13,293 14,022 729 - - - - - 13,293 14,022 729 - Chilean financial institution bonds - - - - - - - - - - - - Chilean corporate bonds - - - - - - - - - - - - Other Chilean securities 305 2,410 2,105 - - - - - 305 2,410 2,105 - Subtotal 13,897 16,731 2,834 - - - - - 13,897 16,731 2,834 - Foreign financial securities Foreign central banks and government securities 269,477 269,803 20,267 (19,941) - - - - 269,477 269,803 20,267 (19,941) Other foreign financial securities 482,394 522,648 40,254 - - - - - 482,394 522,648 40,254 - Subtotal 751,871 792,451 60,521 (19,941) - - - - 751,871 792,451 60,521 (19,941) Total 7,062,407 7,162,542 159,535 (56,680) - - - - 7,062,407 7,162,542 159,535 (56,680) Less than 12 months More than 12 months Total Amortized cost Fair value Unrealized profit Unrealized loss Amortized cost Fair value Unrealized profit Unrealized loss Amortized cost Fair value Unrealized profit Unrealized loss MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Chilean central bank and government securities Chilean central bank Bonds 270,979 272,802 3,600 (1,777) - - - - 270,979 272,802 3,600 (1,777) Chilean central bank notes 1,186,487 1,186,724 237 - - - - - 1,186,487 1,186,724 237 - Other Chilean central bank and government securities 1,895,367 1,908,031 38,002 (25,338) - - - - 1,895,367 1,908,031 38,002 (25,338) Subtotal 3,352,833 3,367,557 41,839 (27,115) - - - - 3,352,833 3,367,557 41,839 (27,115) Other Chilean securities Time deposits in Chilean financial institutions 398 398 - - - - - - 398 398 - - Mortgage finance bonds of Chilean financial institutions 15,962 16,748 786 - - - - - 15,962 16,748 786 - Chilean financial institution bonds - - - - - - - - - - - - Chilean corporate bonds - - - - - - - - - - - - Other Chilean securities 407 2,410 2,003 - - - - - 407 2,410 2,003 - Subtotal 16,767 19,556 2,789 - - - - - 16,767 19,556 2,789 - Foreign financial securities Foreign central banks and government securities 198,020 197,685 11,110 (11,445) - - - - 198,020 197,685 11,110 (11,445) Other foreign financial securities 413,468 425,474 13,080 (1,074) - - - - 413,468 425,474 13,080 (1,074) Subtotal 611,488 623,159 24,190 (12,519) - - - - 611,488 623,159 24,190 (12,519) Total 3,981,088 4,010,272 68,818 (39,634) - - - - 3,981,088 4,010,272 68,818 (39,634)
Schedule of changes in the fair value and the corresponding ECL	Stage1 Stage2 Stage3 TOTAL Collective Collective Collective Gross carrying amount at January 1, 2020 4,010,272 - - 4,010,272 New assets purchased 14,708,776 - - 14,708,776 Transfers to stage 1 - - - - Transfers to stage 2 - - - - Transfers to stage 3 - - - - Assets derecognized or matured (excluding write-off) (11,440,253) - - (11,440,253) Changes due to modifications not derecognized 100,401 - - 100,401 Other adjustments (216,654) - - (216,654) At December 31, 2020 7,162,542 - - 7,162,542 Stage1 Stage2 Stage3 TOTAL Collective Collective Collective ECL at January 1, 2020 456 - - 456 New assets purchased 1,965 - - 1,965 Transfers to stage 1 - - - - Transfers to stage 2 - - - - Transfers to stage 3 - - - - Assets derecognized or matured (excluding write-off) (1,501) - - (1,501) Changes due to modifications not derecognized 219 - - 219 Write-off - - - - Other adjustments (1) - - (1) At December 31, 2020 1,138 - - 1,138 Stage1 Stage2 Stage3 TOTAL Collective Collective Collective Gross carrying amount at January 1, 2019 2,394,323 - - 2,394,323 New assets purchased 7,573,665 - - 7,573,665 Transfers to stage 1 - - - - Transfers to stage 2 - - - - Transfers to stage 3 - - - - Assets derecognized or matured (excluding write-off) (5,694,456) (5,694,456) Changes due to modifications not derecognized 394,648 - - 2,273,857 Write-off - - - - Other adjustments (657,908) - - (657,908) At December 31, 2019 4,010,272 - - 4,010,272 Stage1 Stage2 Stage3 TOTAL Collective Collective Collective ECL at January 1, 2019 258 - - 258 New assets purchased 816 - - 816 Transfers to stage 1 - - - - Transfers to stage 2 - - - - Transfers to stage 3 - - - - Assets derecognized or matured (excluding write-off) (614) - - (614) Changes due to modifications not derecognized 67 - - 67 Write-off - - - - Other adjustments (71) - - (71) At December 31, 2019 456 - - 456
Schedule of gross profits and losses realized on the sale of available for sale investments	As of December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Sale of available for sale investments generating realized profits 3,696,791 5,781,636 3,505,266 Realized profits 82,925 63,828 8,802 Sale of available for sale investments generating realized losses 379,046 607,349 709,371 Realized losses 2,246 156 6,004

Investments in Associates and_2

Investments in Associates and other Companies (Tables)	12 Months Ended
	Dec. 31, 2019
Disclosure of interests in other entities [text block] [Abstract]
Schedule of investments in associates and other companies	Investment Ownership interest As of December 31, Carrying value As of December 31, Profit and loss As of December 31, 2020 % 2019 % 2018 % 2020 MCh$ 2019 MCh$ 2018 MCh$ 2020 MCh$ 2019 MCh$ 2018 MCh$ Redbanc S.A. (*) - - 33,43 - - 2,822 - - - Transbank S.A. (*) - - 25,00 - - 17,651 - - - Centro de Compensación Automatizado S.A. 33,33 33,33 33,33 2,788 2,184 1,894 603 293 305 Sociedad Interbancaria de Depósito de Valores S.A. 29,29 29,29 29,29 1,633 1,485 1,233 302 252 223 Cámara de Compensación de Alto Valor S.A. 15,00 15,00 15,00 971 958 945 28 29 58 Administrador Financiero del Transantiago S.A. 20,00 20,00 20,00 3,476 3,986 3,680 337 390 582 Sociedad Nexus S.A. (*) - - 12,90 - - 2,279 - - - Servicios de Infraestructura de Mercado OTC S.A. 12,07 12,07 12,48 1,528 1,556 1,491 (24) 60 57 Subtotal 10,396 10,169 31,995 1,246 1,024 1,225 Shares or rights in other companies Bladex - - - - 13 19 Stock Exchanges - - - 142 109 148 Others - 8 8 - - (67) Total 10,396 10,177 32,003 1,388 1,146 1,325
Schedule of fair value of these equity investments	December 31, 2020 2019 MCh$ MCh$ Bladex 310 328 Stock exchange 228 154 Others 10 - Total 548 482
Schedule of financial information of associates	As of December 31, 2020 2019 2018 Net income Net income Net income Assets Liabilities Equity Assets Liabilities Equity Assets Liabilities Equity MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Redbanc S.A. - - - - 23,413 14,106 8,441 866 20,825 12,469 7,505 851 Transbank S.A. - - - - 1,217,448 1,133,441 70,605 13,402 904,558 835,200 56,888 12,470 Centro de Compensación Automatizado S.A. 11,134 2,953 6,371 1,810 8,550 1,998 5,671 881 7,073 1,480 4,677 916 Sociedad Interbancaria de Depósito de Valores S.A. 5,840 314 4,496 1,030 5,074 4 4,209 861 4,392 230 3,400 762 Cámara de Compensación de Alto Valor S.A. 7,158 722 6,246 190 7,372 986 6,193 193 6,728 622 5,722 384 Administrador Financiero del Transantiago S.A. 49,841 30,670 17,227 1,944 54,712 34,787 17,978 1,947 55,818 37,419 15,490 2,909 Sociedad Nexus S.A. - - - - 31,147 13,471 17,660 16 35,139 18,335 13,955 2,849 Servicios de Infraestructura de Mercado OTC S.A. 14,480 2,232 12,441 (193) 15,152 2,682 11,993 477 25,273 13,313 11,506 454 Total 88,453 36,891 46,781 4,781 1,362,868 1,201,475 142,750 18,643 1,059,806 919,068 119,143 21,595
Schedule of investments in other companies	As of December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Opening balance as of January 1, 10,177 32,003 27,585 Acquisition of investments - - Sale of investments (20) - - Participation in income 1,388 1,146 1,325 Dividends received (508) (130) (38) Other adjustments (*) (641) (22,842) 3,131 Total 10,396 10,177 32,003

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of intangible assets [text block] [Abstract]
Schedule of composition of intangible assets	As of December 31, 2020 Average remaining useful life Net opening balance as of January 1, 2020 Gross balance Accumulated amortization Net balance MCh$ MCh$ MCh$ MCh$ Licenses - - 35,997 (35,997) - Software development 2 73,389 248,537 (166,000) 82,537 Total 73,389 284,534 (201,997) 82,537 As of December 31, 2019 Average remaining useful life Net opening balance as of January 1, 2019 Gross balance Accumulated amortization Net balance MCh$ MCh$ MCh$ MCh$ Licenses - 82 35,997 (35,997) - Software development 2 66,841 214,005 (140,616) 73,389 Total 66,923 250,002 (176,613) 73,389 ,
Schedule of changes in the value of intangible assets		Gross balances Licenses Software development Total MCh$ MCh$ MCh$ Balances as of January 1, 2020 35,997 214,005 250,002 Acquisitions - 35,170 35,170 Disposals and impairment - (638) (638) Other - - - Balances as of December 31, 2020 35,997 248,537 284,534 Balances as of January 1, 2019 37,224 181,191 218,415 Acquisitions - 32,860 32,860 Disposals and impairment (1,227) - (1,227) Other - (46) (46) Balances as of December 31, 2019 35,997 214,005 250,002 Accumulated amortization Licenses Software development Total MCh$ MCh$ MCh$ Balances as of January 1, 2020 (35,997) (140,616) (176,613) Year’s amortization - (25,384) (25,384) Other changes - - - Balances as of December 31, 2020 (35,997) (166,000) 201,997 Balances as of January 1, 2019 (37,142) (114,350) (151,492) Year’s amortization (82) (26,266) (26,348) Other changes 1,227 - 1,227 Balances as of December 31, 2019 (35,997) (140,616) (176,613)

Fixed Assets and Right of Use_2

Fixed Assets and Right of Use Assets and Lease Liability (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of quantitative information about leases for lessee [abstract]
Schedule of property, plant, and equipment balances	As of December 31, 2020 Net opening balance as of January 1, 2020 Gross balance Accumulated depreciation Net balance MCh$ MCh$ MCh$ MCh$ Land and buildings 173,061 308,499 (140,805) 167,694 Equipment 55,494 243,084 (190,636) 52,448 Other 22,206 75,159 (54,447) 20,712 Total 250,761 626,742 (385,888) 240,854 As of December 31, 2019 Net opening balance as of January 1, 2019 Gross balance Accumulated depreciation Net balance MCh$ MCh$ MCh$ MCh$ Land and buildings 174,758 302,405 (129,344) 173,061 Equipment 56,865 219,600 (164,106) 55,494 Other 21,963 69,758 (47,552) 22,206 Total 253,586 591,763 (341,002) 250,761
Schedule of changes in value of property, plant, and equipment	2020 Land and buildings Equipment Other Total MCh$ MCh$ MCh$ MCh$ Balances as of January 1, 2020 302,405 219,600 69,758 591,763 Additions 17,790 25,233 7,500 50,523 Disposals (11,696) (1,749) (2,099) (15,544) Impairment due to damage (*) - - - - Other - - - - Balances as of December 31, 2020 308,499 243,084 75,159 626,742 2019 Land and buildings Equipment Other Total MCh$ MCh$ MCh$ MCh$ Balances as of January 1, 2019 289,568 192,328 62,156 544,052 Additions 16,486 33,302 7,602 57,390 Disposals (2,636) (6,030) - (8,666) Impairment due to damage (1,013) - - (1,013) Other - - - - Balances as of December 31, 2019 302,405 219,600 69,758 591,763 (*) Banco Santander-Chile has recognized in its consolidated financial statements as of December 31, 2019 impairment of $1,013 million, due to the effects of social unrest in the country. See Note 32.
Schedule of accumulated depreciation	2020 Land and buildings Equipment Other Total MCh$ MCh$ MCh$ MCh$ Balances as of January 1, 2020 (129,344) (164,106) (47,552) (341,002) Depreciation charges in the period (19,026) (28,370) (8,915) (56,311) Sales and disposals in the period 12,381 1,840 2,020 16,241 Other (4,816) - - (4,816) Balances as of December 31, 2020 (140,805) (190,636) (54,447) (385,888) 2019 Land and buildings Equipment Other Total MCh$ MCh$ MCh$ MCh$ Balances as of January 1, 2019 (114,810) (135,463) (40,193) (298,472) Depreciation charges in the period (16,018) (29,968) (6,869) (52,855) Sales and disposals in the period 9,490 1,325 - 10,815 Other - - (490) (490) Balances as of December 31, 2019 (121,338) (164,106) (47,552) (332,996)
Schedule of composition of the right of use assets	As of December 31, 2020 2020 Opening balances as of January 1, 2019 Gross balance Accumulated depreciation Net balance MCh$ MCh$ MCh$ MCh$ Land and building 157,572 197,573 (49,576) 147,997 Other - - - - Total 157,572 197,573 (49,576) 147,997 As of December 31, 2019 2019 First application balance as of January 1, 2019 Gross balance Accumulated depreciation Net balance MCh$ MCh$ MCh$ MCh$ Land and building 154,284 182,910 (25,338) 157,572 Other - - - - Total 154,284 182,910 (25,338) 157,572
Schedule of right of use assets under lease	2020 Land and building Other Total MCh$ MCh$ MCh$ Balances as of January 1, 2020 182,910 - 182,910 Additions 24,136 - 24,136 Disposals (9,473) - (9,473) Impairment - - - Other - - - Balances as of December 31, 2020 197,573 - 197,573 2019 Land and building Other Total MCh$ MCh$ MCh$ Balances as of January 1, 2019 154,284 - 154,284 Additions 48,008 - 48,008 Disposals (17,669) - (17,669) Impairment (1,713) - (1,713) Other - - - Balances as of December 31, 2019 182,910 - 182,910
Schedule of accumulated amortization	2020 Land and building Other Total MCh$ MCh$ MCh$ Balances as of January 1, 2020 (25,338) - (25,338) Amortization for the period (27,731) - (27,731) Sales and disposals during the period 3,496 - 3,496 Transfers - - - Others (3) - (3) Balances as of December 31, 2020 (49,576) - (49,576) 2019 Land and building Other Total MCh$ MCh$ MCh$ Balances as of January 1, 2019 - - - Amortization for the period (26,889) - (26,889) Sales and disposals during the period 1,551 - 1,551 Transfers - - - Others - - - Balances as of December 31, 2019 (25,338) - (25,338)
Schedule of composition of lease liability balances	As of December 31, 2020 2019 MCh$ MCh$ Lease liability 149,585 158,494 Total 149,585 158,494
Schedule of operating lease commitment	MCh$ Operating lease commitments as at December 31, 2018 173,602 Discounted using the lessee´s incremental borrowing rate of at the date of initial application 14,726 Lease liabilities recognized due to IFRS 16 implementation 139,558 Lease liability recognized as at January 1, 2019 154,284
Schedule of assets for the right of use leased assets and lease liability	As of December 31, 2020 2019 MCh$ MCh$ Depreciation 27,731 26,889 Interests 2,651 2,965 Short term lease 1,625 4,177 Total 32,007 34,031
Schedule of maturity level of the lease liability	As of December 31, 2020 2019 MCh$ MCh$ Due within 1 year 25,526 26,061 Due after 1 year but within 2 years 23,461 24,311 Due after 2 years but within 3 years 21,472 21,667 Due after 3 years but within 4 years 19,343 19,411 Due after 4 years but within 5 years 16,336 16,982 Due after 5 years 43,447 50,062 Total 149,585 158,494
Schedule of future minimum lease cash inflows under non-cancellable operating leases	As of December 31, 2020 2019 MCh$ MCh$ Due within 1 year 740 603 Due after 1 year but within 2 years 1,015 598 Due after 2 years but within 3 years 736 500 Due after 3 years but within 4 years 639 498 Due after 4 years but within 5 years 448 412 Due after 5 years 1,283 1,563 Total 4,861 4,174

Current and Deferred Taxes (Tab

Current and Deferred Taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure Of Current And Deferred Taxes Explanatory [Abstract]
Schedule of current taxes	As of December 31, 2020 2019 MCh$ MCh$ Summary of current tax liabilities (assets) Current tax (assets) (11,648) Current tax liabilities 12,977 - Total tax payable (recoverable) 12,977 (11,648) (Assets) liabilities current taxes detail (net) Income tax, tax rate 174,205 153,424 Minus: Provisional monthly payments (157.648) (159,943) Credit for training expenses (2.137) (2,145) Grant credits (1.360) (1,149) Other (83) (1,835) Total tax payable 12,977 (11,648)
Schedule of effect on income	As of December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Income tax expense Current tax 174,205 153,424 196,527 Credits (debits) for deferred taxes Origination and reversal of temporary differences (28,465) 37,432 (25,517) Valuation provision - - (56) Subtotals 145,740 190,856 170,954 Tax for rejected expenses (Article No21) 1,354 927 1,110 Other (4,561) (16,709) (4,920) Net charges for income tax expense 142,533 175,074 167,144
Schedule of effective tax rate reconciliation	For the year ended, 2020 2019 2018 Tax rate Amount Tax rate Amount Tax rate Amount % MCh$ % MCh$ % MCh$ Tax calculated over profit before tax 27.00 187,721 27.00 214,566 27.00 207,046 Price level restatement for tax purposes (1) (6.15) (42,730) (6.33) (50,297) (5.15) (39,494) Single penalty tax (rejected expenses) 0.19 1,354 0.12 927 0.14 1,110 Other (0.55) (3,812) 1.24 9,878 (0.20) (1,518) Effective tax rates and expenses for income tax 20.50 142,533 22.03 175,074 21.79 167,144
Schedule of effect of deferred taxes on comprehensive income	As of December 31, 2020 2019 MCh$ MCh$ Deferred tax assets Debt instruments at FVOCI 14,907 8,074 Cash flow hedges 36,927 10,918 Total deferred tax assets recognized through other comprehensive income 51,834 18,992 Deferred tax liabilities Debt instruments at FVOCI (42,371) (15,830) Cash flow hedges - - Total deferred tax liabilities recognized through other comprehensive income (42,371) (15,830) Net deferred tax balances in equity 9,463 3,162 Deferred taxes in equity attributable to shareholders of the Bank 9,776 3,444 Deferred tax in equity attributable to non-controlling interests (313) (282)
Schedule of effect of deferred taxes on income	As of December 31, 2020 2019 MCh$ MCh$ Deferred tax assets Interests and adjustments 8,166 9,531 Extraordinary charge-offs 17,705 15,325 Assets received in lieu of payment 1,425 1,214 Exchange rate adjustments 89 - Property, plant and equipment valuation - - 6,381 Allowance for loan losses 238,670 188,956 Provision for expenses 101,321 89,098 Leased assets 89,458 116,226 Subsidiaries tax losses 7,394 5,416 Right of use assets 428 249 Total deferred tax assets 464,656 432,396 Deferred tax liabilities Valuation of investments (19,967) (17,518) Fixed assets valuation (7,394) - Prepaid expenses (16,691) (20,347) Valuation provision (5,775) (6,058) Derivatives (37,265) (36,512) Exchange rate adjustments - - (2,817) Other (30) (75) Total deferred tax liabilities (87,122) (83,327)
Schedule of deferred tax assets and liabilities	As of December 31, 2020 2019 MCh$ MCh$ Deferred tax assets Recognized through other comprehensive income 51,834 18,992 Recognized through profit or loss 464,656 432,396 Total deferred tax assets 516,490 451,388 Deferred tax liabilities Recognized through other comprehensive income (42,371) (15,830) Recognized through profit or loss (87,122) (83,327) Total deferred tax liabilities (129,493) (99,157)

Other Assets (Tables)

Other Assets (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of other assets [text block] [Abstract]
Schedule of other assets	As of December 31, 2020 2019 MCh$ MCh$ Assets for leasing (1) 62,967 67,139 Assets received or awarded in lieu of payment Assets received in lieu of payment 15,213 18,755 Assets awarded at judicial sale 17,430 22,177 Provision on assets received in lieu of payment or awarded (1,196) (2,042) Subtotal 31,447 38,890 Other assets Guarantee deposits (margin accounts) (2) 608,359 314,616 Non-current assets classified as held for sale (3) 22,036 22,394 Gold investments 765 680 VAT credit 27,519 22,663 Income tax recoverable - 1,787 Prepaid expenses (4) 387,668 432,030 Assets recovered from leasing for sale 3,191 3,575 Valuation adjustments by macro hedge (5) 327,938 210,867 Pension plan assets 673 670 Accounts and notes receivable 100,504 147,108 Notes receivable through brokerage and simultaneous transactions 41,960 43,354 Other receivable assets 33,567 44,262 Other assets (6) 98,780 89,111 Subtotal 1,652,960 1,333,117 Total 1,747,374 1,439,146 (1) Assets available to be granted under the financial leasing agreements. (2) Guarantee deposits (margin accounts) correspond to collateral associated with derivative financial contracts to mitigate the counterparty credit risk and are mainly established in cash. These guarantees operate when mark to market of derivative financial instruments exceed the levels of threshold agreed in the contracts, which could result in the Bank delivering or receiving collateral. (3) Corresponds to the interests in Redbanc S.A., Transbank S.A. and Nexus S.A., which have been reclassified as non-current assets classified as held for sale in accordance with IFRS 5 “Non-current assets held for sale and discontinued operations”, for additional information see Note 1 v) and Note 38. (4) Under this item, the Bank has recorded prepaid expense related to the Santander LATAM Pass program, which is consumed on a monthly basis in accordance with the client use of Bank’s transactional products and therefore the Bank assigned the respective LATAM Pass miles. In May 2020, LATAM Airlines Group S.A began a reorganization process under Chapter 11, with an aim to was continue operating. LATAM has publicly stated its intention to honor all current and future tickets, as well as travel vouchers, miles and frequent flyer programs, which has been ratified by the bankruptcy court of New York (in charge of chapter 11). In addition, LATAM has formalized two tranches of the DIP (Debtor in Possession) financing proposal for a total of USD 2,200 million, obtaining all resources necessary to continue operating during the crisis. On October, the company made its first disbursement for US$1,150 million from the DIP financing, which represents 50% of the amount available. (5) Net assets and liabilities fair value valuation subject to macro hedges. See Note 7 (6) Other assets mainly include settlement of derivatives and other financial transactions.

Time Deposits and Other Time _2

Time Deposits and Other Time Liabilities (Tables)	12 Months Ended
	Dec. 31, 2020
Time Deposits And Other Time Liabilities Explanatory [Abstract]
Schedule of time deposits and other time liabilities	As of December 31, 2020 2019 MCh$ MCh$ Deposits and other demand liabilities Checking accounts 11,342,648 8,093,108 Other deposits and demand accounts 1,583,183 741,103 Other demand liabilities 1,635,062 1,463,221 Subtotal 14,560,893 10,297,432 Time deposits and other time liabilities Time deposits 10,421,872 13,064,932 Time savings account 153,330 123,787 Other time liabilities 6,589 4,098 Subtotal 10,581,791 13,192,817 Total 25,142,684 23,490,249

Interbank Borrowings (Tables)

Interbank Borrowings (Tables)	12 Months Ended
	Dec. 31, 2020
Interbank Borrowings (Tables) [Line Items]
Schedule of Interbank borrowings	As of December 31, 2020 2019 MCh$ MCh$ Loans from financial institutions and the Central Bank of Chile 4,959,260 - Loans from domestic financial institutions 217,102 286,603 Loans from foreign financial institutions Banco Santander S.A., Madrid 534.496 - The Bank of Nova Scotia 171.024 134,819 The Bank of New York Mellon 106.860 119,616 Bank of America N.A. US Foreig 90.711 355,051 Zurcher Kantonalbank 71.304 - Wells Fargo Bank N.A. 71.259 231,823 State Bank of India 36.013 28,231 Sumitomo Mitsui Banking Corporation 35.628 179,415 Wachovia Bank NA 10.254 - Banco Santander Hong Kong 7.960 3,697 Bank of Tokio Mitsubishi 2.055 156 Banco Santander Brasil S.A. 1.694 7,873 Standard Chartered Bank 1.691 153,373 Jp Morgan Chase, New York 1.571 - Standard Chartered Bank 1.516 3,613 Caja Madrid - Caja de Ahorros 862 - The Hongkong and Shanghai Bank 801 - Korea Exchange Bank 760 761 Industrial and Commercial Bank 755 898 Hong Kong and Shanghai Banking 598 684 Kookmin Bank 376 185 Banco Do Brasil 265 - U.S. Bank 248 - China Merchants Bank 231 597 Taiwan Cooperative Bank 227 131 Bank of China 223 952 Hua Nan Commercial Bank Ltd. 200 102 Banque Bruxelles Lambert S.A. 174 - Banca Monte Dei Paschi Di Siena 163 58 Unicredito Italiano Spa 161 583 Keb Hana Bank 156 119 Banco Santander Central Hispano 141 848 Bper Banca S.P.A. 137 - Hdfc Bank Limited 131 72 Bank Leumi Le Israel B.M. 127 - Bank of Baroda 124 9 Fortis Bank S.A./N.V. Brussels 108 50 Banca Commerciale Italiana 88 50 Caixa Destalvis I Pensions de Barcelona 87 63 Banco Bpm Spa 84 66 Rabobank, Hong Kong Branch 79 477 Banco de la Republica Oriental 74 23 Kbc Bank Nv 68 406 Canara Bank 61 66 Habib Bank Limited 61 38 First Union National Bank 60 - Caixabank S.A. 58 166 Icici Bank Limited 52 - Kotak Mahindra Bank Limited 49 - Citibank N.A. 46 269,841 Arab Bank Plc 41 - China Construction Bank 38 - Credit Agricole Italia S.P.A. 33 - Bankinter, S.A. 31 - Banco de La Nacion Argentina 30 - Bank of East Asia, Limited 29 82 Banco Popular Espanol, S.A. 29 - Banco Interamericano de Finanz 20 - Agricultural Bank of China 18 152 Woori Bank 15 155 Denizbank A.S., Istanbul 15 - United Bank of India 14 113 Banco Popolare 14 - Subtotal 1,152,199 1,495,414 As of December 31, 2020 2019 MCh$ MCh$ Loans from foreign financial institutions, continued Habib Metropolitan Bank Limite 13 - E. Sun Commercial Bank Ltd. 11 159 Nova Ljubljanska Banka D.D. 7 - Indian Overseas Bank 6 - Shanghai Commercial and Saving 1 6 Mizuho Bank Ltd Ny - 269,404 Barclays Bank Plc London - 98,803 Corporacion Andina De Fomento - 75,097 Zürcher Kantonalbank - 75,002 The Toronto Dominion Bank - 71,191 Hsbc Bank PLC - 69,786 Bank of Montreal - 56,123 Banco Latinoamericano de Comer - 18,731 Banco Bilbao Vizcaya Argentaria - 571 BBVA Bancomer, S.A. - 553 Bank of Communications - 385 Bank of The West - 261 Danske Bank A/S - 224 Deutsche Bank A.G. - 193 Bank of Taiwan - 135 Shinhan Bank - 133 Banca Di Credito Cooperativo 112 Joint Stock Commercial Bank Fo. - 110 Banca Nazionale Del Lavoro S.P - 106 Industrial Bank of Korea - 96 Banco Bradesco S.A. - 84 Bank of Ningbo - 83 China Everbright Bank - 70 Cassa Di Risparmio Di Parma E - 69 Mizuho Corporate Bank Ltd. - 67 Banco Comercial Portugues - 63 Shanghai Pudong Development Ba - 59 Kasikornbank Public Company Li - 33 Banco Rio de La Plata S.A. - 24 Australia And New Zealand Bank - 23 Citic Industrial Bank - 19 Shangai Pudong Development Ban - 14 Banco Caixa Geral - 10 Hsbc Bank USA - 2 Subtotal 38 737,801 Total 6,328,599 2,519,818
Loans From Chilean Central Bank [Member]
Interbank Borrowings (Tables) [Line Items]
Schedule of foreign obligations	As of December 31, 2020 2019 MCh$ MCh$ Due within 1 year - - Due within 1 and 2 year 1,104,759 - Due within 2 and 3 year - - Due within 3 and 4 year 3,854,501 - Due after 5 years - - Total loans from Chilean Central Bank 4,959,260 -
Loans From Domestic Financial Institutions [Member]
Interbank Borrowings (Tables) [Line Items]
Schedule of foreign obligations	As of December 31, 2020 2019 MCh$ MCh$ Due within 1 year 217,102 158,855 Due within 1 and 2 year 117,344 Due within 2 and 3 year - 8,167 Due within 3 and 4 year - 2,237 Due after 5 years - - Total loans from domestic financial institutions 217,102 286,603
Loans From Foreign Financial Institutions [Member]
Interbank Borrowings (Tables) [Line Items]
Schedule of foreign obligations	As of December 31, 2020 2019 MCh$ MCh$ Due within 1 year 1,116,570 1,970,790 Due within 1 and 2 year 35,667 225,025 Due within 2 and 3 year - 37,400 Due within 3 and 4 year - - Due after 5 years - - Total loans from foreign financial institutions 1,152,237 2,233,215

Issued Debt Instruments and O_2

Issued Debt Instruments and Other Financial Liabilities (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of debt instruments [text block] [Abstract]
Schedule of composition of issued debt instruments and other financial liabilities	As of December 31, 2020 2019 MCh$ MCh$ Other financial liabilities Obligations to public sector - 9,198 Other domestic obligations 175,344 204,705 Foreign obligations 8,974 12,455 Subtotals 184,318 226,358 Issued debt instruments Mortgage finance bonds 12,314 18,502 Senior bonds 6,749,989 8,574,213 Mortgage bond 84,335 89,924 Subordinated bonds 1,357,539 818,084 Subtotals 8,204,177 9,500,723 Total 8,388,495 9,727,081
Schedule of debts classified	As of December 31, 2020 Current Non-current Total MCh$ MCh$ MCh$ Mortgage finance bonds 4,982 7,332 12,314 Senior bonds 1,124,558 5,625,431 6,749,989 Mortgage bond 5,465 78,870 84,335 Subordinated bonds - 1,357,539 1,357,539 Issued debt instruments 1,135,005 7,069,172 8,204,177 Other financial liabilities 184,028 290 184,318 Total 1,319,033 7,069,462 8,388,495 As of December 31, 2019 Current Non-current Total MCh$ MCh$ MCh$ Mortgage finance bonds 6,013 12,489 18,502 Senior bonds 2,078,202 6,496,011 8,574,213 Mortgage bond 5,137 84,787 89,924 Subordinated bonds - 818,084 818,084 Issued debt instruments 2,089,352 7,411,371 9,500,723 Other financial liabilities 226,033 325 226,358 Total 2,315,385 7,411,696 9,727,081
Schedule of mortgage finance bonds	As of December 31, 2020 2019 MCh$ MCh$ Due within 1 year 4,982 6,013 Due after 1 year but within 2 years 3,816 4,944 Due after 2 year but within 3 years 2,375 3,928 Due after 3 year but within 4 years 979 2,442 Due after 4 year but within 5 years 162 1,005 Due after 5 years - 170 Total mortgage bonds 12,314 18,502
Schedule of senior bonds by currency	As of December 31, 2020 2019 MCh$ MCh$ Santander bonds in UF 4,017,708 4,814,604 Santander bonds in USD 1,263,714 1,649,238 Santander bonds in CHF 466,738 499,485 Santander bonds in Ch$ 639,489 1,242,633 Santander bonds in AUD 125,781 124,748 Current bonds in JPY 68,093 77,797 Santander bonds in EUR 168,466 165,708 Total senior bonds 6,749,989 8,574,213
Schedule of placement of senior bonds	Series Currency Amount Term Issuance rate Series approval date Series maximum amount Maturity date W1 UF 1,996,000 5 and 3 months 1.55% annual 02-04-2018 2,000,000 06-01-2025 Total UF 1,996,000 2,000,000 US Bonds USD 742,500,000 5 years 2,70% annual 01-07-2020 750,000,000 01-07-2025 Total USD 742,500,000 750,000,000 Series Currency Amount Term Issuance rate Series approval date Series maximum amount Maturity date T7 UF 5,000,000 4 2,50% 02-01-2016 5,000,000 02-01-2023 T8 UF 5,678,000 4 y 6 2,55% 02-01-2016 5,678,000 08-01-2023 T14 UF 9,000,000 8 2,80% 02-01-2016 18,000,000 02-01-2027 T6 UF 5,000,000 10 1,70% 11-01-2018 5,000,000 05-01-2029 T10 UF 5,000,000 5 y 4 2,60% 02-01-2016 5,000,000 08-01-2024 Total UF 29,678,000 38,678,000 U9 CLP 75,000,000,000 2 y 8 ICP + 0,80% yearly 11-01-2018 75,000,000,000 11-19-2021 P-5 CLP 75,000,000,000 2 y 7 5,3% yearly 03-01-2015 150,000,000,000 03-01-2022 Total CLP 150,000,000,000 225,000,000,000 EUR EUR 30,000,000 7 1,10% 02-01-2019 40,000,000 02-07-2026 EUR EUR 25,000,000 5 1,25% 11-26-2019 25,000,000 11-26-2034 Total EUR 55,000,000 65,000,000 AUD AUD 22,000,000 15 3,66% yearly 05-20-2019 22,000,000 05-20-2034 AUD AUD 20,000,000 5 1,13% yearly 07-11-2019 20,000,000 07-11-2024 AUD AUD 28,000,000 5 1,13% yearly 07-17-2019 28,000,000 07-17-2024 AUD AUD 15,000,000 5 1,13% yearly 07-17-2019 15,000,000 07-17-2024 AUD AUD 75,000,000 20 3,05% yearly 08-30-2019 75,000,000 02-28-2039 AUD AUD 12,000,000 5 3,16% yearly 11-12-2019 12,000,000 11-20-2034 AUD AUD 13,000,000 5 2,91% yearly 11-21-2019 13,000,000 11-27-2034 Total 185,000,000 185,000,000 CHF CHF 150,000,000 5 y 6 0,38% yearly 03-12-2019 150,000,000 09-27-2024 CHF CHF 100,000,000 10 0,14% yearly 08-29-2019 100,000,000 08-29-2029 Total CHF 250,000,000 250,000,000 Series Currency Amount Term Issuance rate Series approval date Series maximum amount Maturity date Bono USD USD 200,000,000 10 years 3.79% 01-21-2020 200,000,000 01-21-2030 Total USD 200,000,000 200,000,000 USTDH20914 UF 3,000,000 14 years y 5 months 3.00% 04-07-2020 3,000,000 09-01-2034 USTDH30914 UF 3,000,000 19 years y 5 months 3.15% 04-07-2020 3,000,000 09-01-2039 USTDW20320 UF 5,000,000 15 years y 3 months 3.50% 06-19-2020 5,000,000 09-01-2035 Total UF 11,000,000 11,000,000
Schedule of partial repurchase	Fecha Tipo Moneda Monto 01-02-2020 Senior UF 357,000 01-03-2020 Senior UF 300,000 01-09-2020 Senior UF 60,000 01-09-2020 Senior UF 27,000 01-13-2020 Senior CLP 50,000,000 01-14-2020 Senior UF 109,000 01-14-2020 Senior CLP 9,820,000,000 01-14-2020 Senior UF 131,000 01-14-2020 Senior UF 322,000 01-15-2020 Senior USD 2,490,000 01-15-2020 Senior UF 47,000 01-16-2020 Senior CLP 400,000,000 01-16-2020 Senior UF 1,000 01-17-2020 Senior UF 28,000 01-20-2020 Senior UF 74,000 01-21-2020 Senior UF 171,000 01-21-2020 Senior UF 181,000 01-21-2020 Senior CLP 330,000,000 01-22-2020 Senior CLP 11,430,000,000 01-24-2020 Senior UF 2,000 01-29-2020 Senior UF 1,000 01-29-2020 Senior CLP 120,000,000 01-30-2020 Senior CLP 10,000,000 01-31-2020 Senior UF 40,000 02-06-2020 Senior CLP 6,000,000,000 02-07-2020 Senior CLP 1,180,000,000 02-11-2020 Senior CLP 7,430,000,000 02-12-2020 Senior CLP 2,520,000,000 02-13-2020 Senior CLP 10,000,000,000 02-17-2020 Senior UF 2,000 02-17-2020 Senior UF 15,000 02-18-2020 Senior UF 50,000 02-18-2020 Senior UF 4,000 02-20-2020 Senior UF 350,000 02-20-2020 Senior UF 115,000 02-21-2020 Senior UF 57,000 02-21-2020 Senior UF 24,000 02-24-2020 Senior UF 250,000 02-24-2020 Senior UF 10,000 02-26-2020 Senior UF 169,000 02-26-2020 Senior UF 1,000 02-27-2020 Senior UF 180,000 02-27-2020 Senior UF 11,000 02-27-2020 Senior CLP 6.750.000.000 03-02-2020 Senior UF 1.000 03-05-2020 Senior UF 2.000 03-09-2020 Senior UF 261.000 03-09-2020 Senior UF 150.000 03-11-2020 Senior UF 2.000 03-17-2020 Senior UF 850.000 03-18-2020 Senior UF 150.000 Fecha Tipo Moneda Monto 03-19-2020 Senior USD 5.000.000 03-23-2020 Senior UF 95.000 03-23-2020 Senior USD 5.000.000 03-24-2020 Senior CLP 1.250.000.000 03-30-2020 Senior UF 62.000 03-31-2020 Senior UF 360.000 03-31-2020 Senior UF 5.000 04-01-2020 Senior CLP 1.000.000.000 04-02-2020 Senior UF 5.184.000 04-02-2020 Senior CLP 16.710.000.000 04-03-2020 Senior CLP 32.800.000.000 04-03-2020 Senior UF 27.000 04-06-2020 Senior CLP 101.400.000.000 04-06-2020 Senior UF 157.000 04-06-2020 Senior USD 10.000.000 04-07-2020 Senior CLP 3.990.000.000 04-07-2020 Senior UF 6.659.000 04-07-2020 Senior USD 10.000.000 04-08-2020 Senior CLP 210.000.000 04-13-2020 Senior CLP 970.000.000 04-14-2020 Senior CLP 2.000.000.000 04-17-2020 Senior CLP 11.900.000.000 05-05-2020 Senior USD 49.000.000 05-14-2020 Senior USD 47.000.000 06-02-2020 Senior CLP 6.020.000.000 06-03-2020 Senior UF 100.000 06-03-2020 Senior CLP 10.750.000.000 06-05-2020 Senior USD 5.000.000 06-08-2020 Senior CLP 23.000.000.000 06-12-2020 Senior CLP 150.000.000 06-16-2020 Senior CHF 12.160.000 06-17-2020 Senior CHF 36.785.000 06-19-2020 Senior CLP 112.490.000.000 06-22-2020 Senior CLP 1.500.000.000 06-26-2020 Senior CLP 3.500.000.000 07-02-2020 Senior CLP 4.620.000.000 07-10-2020 Senior CHF 2.000.000 07-10-2020 Senior CLP 500.000.000 07-15-2020 Senior CLP 490.000.000 07-17-2020 Senior UF 1.000 07-17-2020 Senior CLP 29.780.000.000 08-13-2020 Senior UF 345.000 08-14-2020 Senior USD 3.350.000 08-21-2020 Senior UF 100.000 08-21-2020 Senior UF 77.000 08-24-2020 Senior UF 11.000 08-25-2020 Senior UF 14.000 09-09-2020 Senior UF 24.000 09-09-2020 Senior UF 70.000 09-09-2020 Senior UF 45.000 09-10-2020 Senior UF 210.000 09-23-2020 Senior USD 5.000.000 09-28-2020 Senior UF 50.000 09-29-2020 Senior UF 1.000 09-30-2020 Senior UF 43.000 10-01-2020 Senior UF 4,000 10-06-2020 Senior UF 1,000 10-06-2020 Senior UF 1,000 10-06-2020 Senior CLP 50,000,000 10-06-2020 Senior UF 1,000 10-06-2020 Senior UF 1,000 10-15-2020 Senior UF 2,000 10-20-2020 Senior CHF 2,000,000 10-01-2020 Senior USD 5,153,000 10-19-2020 Senior USD 20,000,000 11-16-2020 Senior USD 1,000,000 11-18-2020 Senior USD 10,000,000 11-15-2020 Senior USD 477,510,000 Date Type Currency Amount 02-12-2019 Senior CLP 10,000,000,000 02-14-2019 Senior CLP 30,000,000,000 02-19-2019 Senior CLP 4,200,000,000 02-22-2019 Senior CLP 14,240,000,000 02-22-2019 Senior CLP 30,000,000 02-22-2019 Senior CLP 10,000,000 03-01-2019 Senior CLP 11,800,000,000 03-04-2019 Senior CLP 40,080,000,000 03-05-2019 Senior CLP 20,000,000,000 03-15-2019 Senior UF 156,000 03-19-2019 Senior UF 418,000 03-20-2019 Senior CLP 6,710,000,000 03-20-2019 Senior UF 154,000 03-21-2019 Senior UF 100,000 03-25-2019 Senior UF 100,000 03-26-2019 Senior UF 90,000 04-08-2019 Senior CLP 3,950,000,000 04-10-2019 Senior UF 409,000 04-16-2019 Senior UF 55,000 04-17-2019 Senior CLP 130,000,000 04-18-2019 Senior CLP 330,000,000 05-16-2019 Senior CLP 14,880,000,000 05-16-2019 Senior UF 9,000 06-13-2019 Senior UF 1,000 10-01-2019 Senior CLP 10,960,000,000 10-02-2019 Senior CLP 100,000,000 10-04-2019 Senior CLP 60,000,000 11-05-2019 Senior CLP 15,220,000,000 11-07-2019 Senior CLP 3,620,000,000 11-13-2019 Senior CLP 5,320,000,000 11-14-2019 Senior UF 2,977,000 11-28-2019 Senior UF 340,000 12-02-2019 Senior UF 105,000
Schedule of maturities of senior bonds	As of December 31, 2020 2019 MCh$ MCh$ Due within 1 year 1,124,558 2,078,202 Due after 1 year but within 2 years 1,047,241 1,147,825 Due after 2 year but within 3 years 742,081 1,221,393 Due after 3 year but within 4 years 1,228,524 742,238 Due after 4 year but within 5 years 1,250,897 1,278,746 Due after 5 years 1,356,688 2,105,809 Total senior bonds 6,749,989 8,574,213
Schedule of mortgage bonds per currency	As of December 31, 2020 2019 MCh$ MCh$ Mortgage bonds in UF 84,335 89,924 Total mortgage bonds 84,335 89,924 As of December 31, 2020 2019 MCh$ MCh$ Subordinated bonds denominated in USD 202,634 - Subordinated bonds denominated in UF 1,154,905 818,084 Total subordinated bonds 1,357,539 818,084
Schedule of maturities of mortgage bond	As of December 31, 2020 2019 MCh$ MCh$ Due within 1 year 5,465 5,137 Due after 1 year but within 2 years 8,773 8,248 Due after 2 year but within 3 years 9,056 8,514 Due after 3 year but within 4 years 9,348 8,788 Due after 4 year but within 5 years 9,649 9,072 Due after 5 years 42,044 50,165 Total Mortgage bonds 84,335 89,924 As of December 31, 2020 2019 MCh$ MCh$ Due within 1 year - - Due after 1 year but within 2 years - - Due after 2 year but within 3 years - - Due after 3 year but within 4 years - - Due after 4 year but within 5 years - - Due after 5 years 1,357,539 818,084 Total subordinated bonds 1,357,539 818,084
Schedule of other financial liabilities	As of December 31, 2020 2019 MCh$ MCh$ Non-current portion: Due after 1 year but within 2 years 42 41 Due after 2 year but within 3 years 47 44 Due after 3 year but within 4 years 50 48 Due after 4 year but within 5 years 55 53 Due after 5 years 96 132 Non-current portion subtotal 290 318 Current portion: Amounts due to credit card operators 134,790 151,984 Acceptance of letters of credit 1,460 5,709 Other long-term financial obligations, short-term portion 47,778 68,347 Current portion subtotal 184,028 226,040 Total other financial liabilities 184,318 226,358

Maturity of Financial Assets _2

Maturity of Financial Assets and Liabilities (Tables)	12 Months Ended
	Dec. 31, 2019
Disclosure Of Maturity Of Assets And Liabilities Explanatory [Abstract]
Schedule of assets and liabilities maturities	As of December 31, 2020 Demand Up to 1 month Between 1 and 3 months Between 3 and 12 months Subtotal up to 1 year Between 1 and 3 years Between 3 and 5 years More than 5 years Subtotal More than 1 year Total MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Financial assets Cash and deposits in banks 2,803,288 - - - 2,803,288 - - - - 2,803,288 Cash items in process of collection 452,963 - - - 452,963 - - - - 452,963 Financial assets held for trading - 680 2,630 499 3,809 633 18,257 111,019 129,909 133,718 Investments under resale agreements - - - - - - - - - - Financial derivative contracts - 385,231 401,486 795,881 1,582,598 1,723,334 1,692,142 4,034,011 7,449,487 9,032,085 Loans and accounts receivables at amortized cost (*) 170,214 1,246,271 1,443,659 3,664,841 6,524,985 3,659,994 293,785 23,861,129 27,814,908 34,339,893 Loans and account receivable at FVOCI (**) 5,405 5,405 16,243 49,037 65,280 70,685 Debt instruments at FVOCI - 1,006,983 493 188,977 1,196,453 205,150 2,378,752 3,382,187 5,966,089 7,162,542 Equity instruments at FVOCI - - - - - - - 548 548 548 Guarantee deposits (margin accounts) 608,359 - - - 608,359 - - - - 608,359 Total financial assets 4,034,824 2,639,165 1,848,268 4,655,603 13,177,860 5,589,111 4,399,179 31,437,931 41,426,221 54,604,081 Financial liabilities Deposits and other demand liabilities 14,560,893 - - - 14,560,893 - - - - 14,560,893 Cash items in process of being cleared 361,631 - - - 361,631 - - - - 361,631 Obligations under repurchase agreements - 969,808 - - 969,808 - - - - 969,808 Time deposits and other time liabilities 159,918 5,843,682 2,912,985 1,434,246 10,350,831 163,053 44,384 23,523 230,960 10,581,791 Financial derivative contracts - 386,690 445,376 931,358 1,763,424 1,552,482 1,708,509 3,994,245 7,255,236 9,018,660 Interbank borrowings 16,832 238,414 222,992 855,434 1,333,672 1,140,426 3,854,501 - 4,994,927 6,328,599 Issued debt instruments - 344,732 447,117 343,156 1,135,005 1,813,341 2,499,560 2,756,271 7,069,172 8,204,177 Lease liabilities 144,478 38,148 1,375 27 184,028 89 105 96 290 184,318 Other financial liabilities - - - 25,526 25,526 44,933 35,679 43,447 124,059 149,585 Guarantees received (margin accounts) 624,205 - - - 624,205 - - - - 624,205 Total financial liabilities 15,867,957 7,821,474 4,029,845 3,589,747 31,309,023 4,714,324 8,142,738 6,817,582 19,674,644 50,983,667 As of December 31, 2019 Demand Up to 1 month Between 1 and 3 months Between 3 and 12 months Subtotal up to 1 year Between 1 and 3 years Between 3 and 5 years More than 5 years Subtotal More than 1 year Total MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Financial assets Cash and deposits in banks 3,554,520 - - - 3,554,520 - - - - 3,554,520 Cash items in process of collection 355,062 - - - 355,062 - - - - 355,062 Financial assets held for trading - 38,644 - 645 39,289 181,705 37,659 11,551 230,915 270,204 Investments under resale agreements - - - - - - - - - - Financial derivative contracts - 371,775 400,196 1,543,446 2,315,417 1,383,493 1,346,329 3,103,369 5,833,191 8,148,608 Loans and accounts receivables at amortized cost (*) 296,461 2,963,578 2,400,909 5,511,374 11,172,322 5,706,433 4,093,147 11,699,613 21,499,193 32,671,515 Loans and account receivable at FVOCI (**) - - - 5,953 5,953 - - 60,213 60,213 66,166 Debt instruments at FVOCI - 1,131,500 3,752 52,130 1,187,382 508,596 725,419 1,588,875 2,822,890 4,010,272 Equity instruments at FVOCI - - - - - - - 482 482 482 Guarantee deposits (margin accounts) 314,616 - - - 314,616 - - - - 314,616 Total financial assets 4,520,659 4,505,497 2,804,857 7,113,548 18,944,561 7,780,227 6,202,554 16,464,103 30,446,884 49,391,445 Financial liabilities Deposits and other demand liabilities 10,297,432 - - - 10,297,432 - - - - 10,297,432 Cash items in process of being cleared 198,248 - - - 198,248 - - - - 198,248 Obligations under repurchase agreements - 380,055 - - 380,055 - - - - 380,055 Time deposits and other time liabilities 142,273 5,184,567 4,905,414 2,417,703 12,649,957 357,856 163,121 21,883 542,860 13,192,817 Financial derivative contracts - 422,749 427,825 951,684 1,802,258 1,253,280 1,180,948 3,154,168 5,588,396 7,390,654 Interbank borrowings 94 363,560 624,167 1,141,824 2,129,645 387,936 2,237 - 390,173 2,519,818 Issued debt instruments - 285,159 759,519 1,044,674 2,089,352 2,394,850 2,042,292 2,974,229 7,411,371 9,500,723 Lease liabilities - - - 26,061 26,061 45,978 36,393 50,062 132,433 158,494 Other financial liabilities 161,021 5,155 30,969 28,888 226,033 83 99 143 325 226,358 Guarantees received (margin accounts) 994,714 - - - 994,714 - - - - 994,714 Total financial liabilities 11,793,782 6,641,245 6,747,894 5,610,834 30,793,755 4,439,983 3,425,090 6,200,485 14,065,558 44,859,313 (*) Loans and accounts receivables at amortized cost are presented on a gross basis, the amount of allowance is Ch$1,036,793 million. (**) Loans and accounts receivables at FVOCI are presented on a gross basis, the amount of allowance is Ch$1,354 million. (*) Loans and accounts receivables at amortized cost are presented on a gross basis, the amount of allowance is Ch$ 896,095 million. (**) Loans and accounts receivables at FVOCI are presented on a gross basis, the amount of allowance is Ch$101 million.

Provisions and Contingent Pro_2

Provisions and Contingent Provisions (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of provisions [text block] [Abstract]
Schedule of composition provisions	As of December 31, 2020 2019 MCh$ MCh$ Provisions for personnel salaries and expenses 104,270 101,223 Provisions for mandatory dividends 164,284 185,727 Provisions for contingent loan 28,247 23,240 Provision for contingencies 33,863 15,940 Total 330,664 326,130
Schedule of activity regarding provision	Personnel and expenses Mandatory Contingent Contingencies Total MCh$ MCh$ MCh$ MCh$ MCh$ Balances as of January 1, 2020 101,223 185,727 23,240 15,940 326,130 Provisions established 76,281 164,284 14,683 25,367 280,615 Application of provisions (71,481) - - - (71,481) Provisions released (1,755) (185,727) (9,676) (7,444) (204,602) Reclassifications - - - - - Other 2 - - - 2 Balances as of December 31, 2020 104,270 164,284 28,247 33,863 330,664 Balances as of January 1, 2019 93,379 178,600 23,709 9,583 305,271 Provisions established 78,316 185,727 15,879 28,373 308,295 Application of provisions (70,385) - - (155) (70,540) Provisions released (552) (178,600) (16,348) (21,861) (217,361) Reclassifications - - - - - Other 465 - - - 465 Balances as of December 31, 2019 101,223 185,727 23,240 15,940 326,130 Balances as of January 1, 2018 97,576 168,840 9,480 27,902 303,798 Provisions established 80,912 178,600 19,240 19,647 298,399 Application of provisions (72,975) - - (4,431) (77,406) Provisions released (3,195) (168,840) (5,011) (33,535) (210,581) Reclassifications - - - - - Other (8,939) - - - (8,939) Balances as of December 31, 2018 93,379 178,600 23,709 9,583 305,271
Schedule of provisions for personnel salaries and expenses	As of December 31, 2020 2019 MCh$ MCh$ Provision for seniority compensation 6,658 6,797 Provision for stock-based personnel benefits - - Provision for performance bonus 65,786 68,595 Provision for vacations 29,307 23,864 Provision for other personnel benefits 2,519 1,967 Total 104,270 101,223
Schedule of provisions for contingent loan risk	December 31, 2020 Stage 1 Stage 2 Stage 3 TOTAL Individual Collective Individual Collective Individual Collective ECL allowance at January 1, 2020 1,509 13,127 226 542 3,487 4,349 23,240 Transfer Transfers from stage 1 to stage 2 (1,273) (3,614) 1,785 13,442 - - 10,340 Transfers from stage 1 to stage 3 - (76) - - 83 2,757 2,764 Transfers from stage 2 to stage 3 - - (73) (148) 2,839 1,720 4,338 Transfers from stage 2 to stage 1 165 2,687 (295) (9,274) - - (6,717) Transfers from stage 3 to stage 2 - - - 240 (6) (1,934) (1,700) Transfers from stage 3 to stage 1 - 14 - - - (444) (430) Net changes on financial assets 2,279 (200) 126 (315) (2,995) (1,748) (2,853) Write-off - - - - - - - Other adjustment 135 (928) (6) 65 (170) 169 (735) At December 31, 2020 2,815 11,010 1,762 4,552 3,238 4,869 28,247 December 31, 2019 Stage 1 Stage 2 Stage 3 TOTAL Individual Collective Individual Collective Individual Collective ECL allowance at January 1, 2019 1,081 15,070 259 172 3,856 3,271 23,709 Transfer Transfers to stage 2 (100) (318) 122 878 - - 582 Transfers to stage 3 - (203) - - 167 4,675 4,639 Transfers to stage 3 - - (24) (144) 1,742 1,290 2,864 Transfers to stage 1 46 122 (82) (473) - - (387) Transfers to stage 2 - - - 234 (54) (1,444) (1,264) Transfers to stage 1 - 45 - - (130) (1,278) (1,363) Net changes on financial assets 491 (1,474) (41) (106) (2,100) 2,173 (5,471) Write-off - - - - - - - Other adjustments (9) (115) (8) (19) 6 8 (137) At December 31, 2019 1,509 13,127 226 542 3,487 4,349 23,240

Other Liabilities (Tables)

Other Liabilities (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of other liabilities [text block] [Abstract]
Schedule of other liabilities	As of December 31, 2020 2019 MCh$ MCh$ Accounts and notes payable 227,518 214,216 Income received in advance 828 640 Macro-hedge valuation adjustment 51,089 - Guarantees received (margin accounts) (1) 624,205 994,714 Notes payable through brokerage and simultaneous transactions (3) 12,504 1,418,340 Other payable obligations (2) 139,622 61,555 Withholding VAT 14,129 8,147 Accounts payable insurance companies 13,911 9,510 Other liabilities 82,047 99,203 Total 1,165,853 2,806,325 (1) Guarantee deposits (margin accounts) correspond to collateral associated to derivative financial contracts to mitigate the counterparty credit risk and are mainly established in cash. These guarantees operate when mark to market of derivative financial instruments exceed the levels of threshold agreed in the contracts, which could result in the Bank delivering or receiving collateral. (2) Other payable obligations mainly relate to settlement of derivatives and other financial transactions derived from the operation of the Bank. (3) In December 2019, Santander Corredora de Bolsa acted as an intermediary in the public offering of shares between Latam and Delta, which was paid to shareholders on January 3, 2019.

Contingencies and Commitments (

Contingencies and Commitments (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of commitments and contingent liabilities [text block] [Abstract]
Schedule of contractual obligations	As of December 31, 2020 2019 MCh$ MCh$ Letters of credit issued 165,119 140,572 Foreign letters of credit confirmed 82,779 70,192 Performance guarantee 1,090,643 1,929,894 Personal guarantees 441,508 451,950 Total contingent liabilities 1,780,049 2,592,608 Available on demand credit lines 8,391,414 8,732,422 Other irrevocable credit commitments 406,234 485,991 Total loan commitment 8,797,648 9,218,413 Total 10,577,697 11,811,021
Schedule of held securities	As of December 31, 2020 2019 MCh$ MCh$ Third party operations Collections 83,392 90,966 Transferred financial assets managed by the Bank 18,017 21,507 Assets from third parties managed by the Bank and its affiliates 1,352,032 1,592,845 Subtotal 1,453,441 1,705,318 Custody of securities Securities held in custody 11,022,790 9,731,894 Securities held in custody deposited in other entity 808,186 1,206,541 Issued securities held in custody 10,461,847 21,636,819 Subtotal 22,292,823 32,575,254 Total 23,746,264 34,280,572

Equity (Tables)

Equity (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of share capital, reserves and other equity interest [text block] [Abstract]
Schedule of activity shares	The activity with respect to shares during 2020, 2019 and 2018 was as follows: SHARES As of December 31, 2020 2019 2018 Issued as of January 1 188,446,126,794 188,446,126,794 188,446,126,794 Issuance of paid shares - - - Issuance of outstanding shares - - - Stock options exercised - - - Issued as of December 31, 188,446,126,794 188,446,126,794 188,446,126,794
Schedule of shareholder composition	Corporate Name or Shareholder’s Name Shares ADRs (*) Total % of equity holding Santander Chile Holding S.A. 66,822,519,695 - 66,822,519,695 35.46 Teatinos Siglo XXI Inversiones Limitada 59,770,481,573 - 59,770,481,573 31.72 The Bank New York Mellon - 22,450,671,671 22,450,671,671 11.91 Banks on behalf of third parties 15,925,407,468 - 15,925,407,468 8.45 Pension funds (AFP) on behalf of third parties 9,929,343,874 - 9,929,343,874 5.27 Stock brokers on behalf of third parties 6,892,162,980 - 6,892,162,980 3.66 Other minority holders 6,655,539,533 - 6,655,539,533 3.53 Total 165,995,455,123 22,450,671,671 188,446,126,794 100.00 Corporate Name or Shareholder’s Name Shares ADRs (*) Total % of equity holding Santander Chile Holding S.A. 66,822,519,695 - 66,822,519,695 35.46 Teatinos Siglo XXI Inversiones Limitada 59,770,481,573 - 59,770,481,573 31.72 The Bank New York Mellon - 24,822,041,271 24,822,041,271 13.17 Banks on behalf of third parties 15,957,137,883 - 15,957,137,883 8.47 Pension funds (AFP) on behalf of third parties 9,995,705,956 - 9,995,705,956 5.30 Stock brokers on behalf of third parties 5,551,024,270 - 5,551,024,270 2.95 Other minority holders 5,527,216,146 - 5,527,216,146 2.93 Total 163,624,085,523 24,822,041,271 188,446,126,794 100.00 Corporate Name or Shareholder’s Name Shares ADRs (*) Total % of equity holding Santander Chile Holding S.A. 66,822,519,695 - 66,822,519,695 35.46 Teatinos Siglo XXI Inversiones Limitada 59,770,481,573 - 59,770,481,573 31.72 The Bank New York Mellon - 26,486,000,071 26,486,000,071 14.05 Banks on behalf of third parties 15,770,481,573 - 15,770,481,573 8.20 Pension funds (AFP) on behalf of third parties 9,033,172,896 - 9,033,172,896 4.79 Stock brokers on behalf of third parties 4,773,558,507 - 4,773,558,507 2.53 Other minority holders 6,109,287,067 - 6,109,287,067 3.25 Total 161,960,126,723 26,486,000,071 188,446,126,794 100.00
Schedule of basic and diluted earnings per share	As of December 31, 2020 2019 2018 MCh$ MCh$ MCh$ a) Basic earnings per share Total attributable to the shareholders of the Bank 547,614 619,091 595,333 Weighted average number of outstanding shares 188,446,126,794 188,446,126,794 188,446,126,794 Basic earnings per share (in Ch$) 2.906 3.285 3.159 Basic earnings per share from continuing operations (in Ch$) 2.906 3.276 3.139 Basic earnings per share from discontinued operations (in Ch$) - 0.009 0.020 b) Diluted earnings per share Total attributable to the shareholders of the Bank 547,614 619,091 595,333 Weighted average number of outstanding shares 188,446,126,794 188,446,126,794 188,446,126,794 Adjusted number of shares 188,446,126,794 188,446,126,794 188,446,126,794 Diluted earnings per share (in Ch$) 2.906 3.285 3.159 Diluted earnings per share from continuing operations (in Ch$) 2.906 3.276 3.139 Diluted earnings per share from discontinued operations (in Ch$) - 0.009 0.020
Schedule of other comprehensive income from available for sale investments and cash flow hedges	For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Debt instruments at FVOCI As of January 1, 29,184 6,962 1,855 Gain (losses) on the re-measurement of debt instruments at FVOCI, before tax 30,062 (17,775) 6,609 Recycling from other comprehensive income to income for the year 43,609 39,997 (1,502) Subtotals 73,671 22,222 5,107 Total 102,885 29,184 6,962 Cash flow hedges As of January 1, (40,435) 9,803 (3,562) Gains (losses) on the re-measurement of cash flow hedges, before tax (93,182) (49,163) 14,048 Recycling adjustments on cash flow hedges, before tax (3,148) (1,075) (683) Amounts removed from equity and included in carrying amount of non-financial asset (liability) which acquisition or incurrence was hedged as a highly probable transaction - - - Subtotals (96,330) (50,238) 13,365 Total (136,765) (40,435) 9,803 Other comprehensive income, before taxes (33,910) (11,251) 16,765 Income tax related to other comprehensive income components Income tax relating to debt instruments at FVOCI (27,464) (7,756) (1,810) Income tax relating to cash flow hedges 36,927 10,918 (2,646) Total 9,463 3,162 (4,456) Other comprehensive income, net of tax (24,447) (8,089) 12,309 Attributable to: Shareholders of the Bank (25,293) (8,856) 11,353 Non-controlling interest 846 767 956

Non-controlling Interest (Table

Non-controlling Interest (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of non-controlling interests [text block] [Abstract]
Schedule of non-controlling interest included in the equity and the income	Other comprehensive income As of December 31, 2020 Non- Equity Income Debt instruments Deferred tax Total other Comprehensive % MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Subsidiaries: Santander Corredora de Seguros Limitada 0,25 174 (4) (4) 1 (3) (7) Santander Corredores de Bolsa Limitada 49,41 22.614 351 (38) 9 (29) 322 Santander Asesorías Financieras Limitada 0,97 493 (5) 152 (41) 111 106 Santander S.A. Sociedad Securitizadora 0,36 2 - - - - - Klare Corredora de Seguros S.A. 49,90 2.902 (880) - - - (880) Santander Consumer Chile S.A. 49,00 29.649 5,619 - - - 5,619 Subtotal 55,834 5,081 110 (31) 79 5,160 Entities controlled through other considerations: Santander Gestión de Recaudación y Cobranzas Limitada 100,00 4,808 (127) - - - (127) Bansa Santander S.A. 100,00 19,565 349 - - - 349 Multiplica Spa 100,00 4,476 (187) - - - (187) Subtotal 28,849 35 35 Total 84,683 5,116 110 (31) 79 5,195 Other comprehensive income As of December 31, 2019 Non- Equity Income Debt instruments Deferred tax Total other Comprehensive % MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Subsidiaries: Santander Corredora de Seguros Limitada 0.25 178 6 1 - 1 7 Santander Corredores de Bolsa Limitada 49.41 22,301 625 (261) 71 (190) 435 Santander Asesorías Financieras Limitada(1) 0.97 498 9 - - - 9 Santander S.A. Sociedad Securitizadora 0.36 2 - - - - - Klare Corredora de Seguros S.A. 49.90 3,782 (503) - - - (503) Santander Consumer Chile S.A. (2) 49.00 24,564 1,544 - - - 1,544 Subtotal 51,325 1,681 (260) 71 (189) 1,492 Entities controlled through other considerations: Santander Gestión de Recaudación y Cobranzas Limitada 100.00 3,777 1,031 - - - 1,031 Bansa Santander S.A. 100.00 20,051 (486) - - - (486) Multiplica Spa 100.00 4,480 (4) - - - (4) Subtotal 28,308 541 - - - 541 Total 79,633 2,222 (260) 71 (189) 2,033 Other comprehensive income As of December 31, 2018 Non-controlling Equity Income Available for sale investments Deferred tax Total other comprehensive income Comprehensive income % MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Subsidiaries: Santander Corredora de Seguros Limitada 0.25 172 4 (2) - (2) 2 Santander Corredores de Bolsa Limitada 49.41 21,673 755 (84) 2 (82) 673 Santander Agente de Valores Limitada 0.94 488 99 - - - 99 Santander S.A. Sociedad Securitizadora 0.36 2 - - - - - Subtotal 22,335 858 (86) 2 (84) 774 Entities controlled through other considerations: Santander Gestión de Recaudación y Cobranzas Limitada 100.00 3,777 852 - - - 852 Bansa Santander S.A. 100.00 20,051 2,650 - - - 2,650 Subtotals 23,828 3,502 - - - 3,502 Total 46,163 4,360 (86) 2 (84) 4,276 (1) Formerly Santander Agente de Valores Limitada (2) On November 27, 2019, the Bank acquired 51% of Santander Consumer S.A., and the remaining 49% is accounted as non-controlling interest.
Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests	As of December 31, 2020 2019 2018 Assets Liabilities Capital Net Assets Liabilities Capital Net Assets Liabilities Capital Net MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Santander Corredora de Seguros Limitada 79,936 10,777 70,554 (1,395) 82,918 12,372 68,159 2,387 77,764 9,595 66,374 1,795 Santander Corredores de Bolsa Limitada 94,802 49,038 45,053 711 1,479,974 1,434,843 43,866 1,265 102,228 57,999 42,691 1,538 Santander Asesorias Financieras Limitada(*) 52,070 1,142 51,454 (526) 51,505 51 50,481 973 50,552 71 40,177 10,304 Santander S.A. Sociedad Securitizadora 630 175 547 (92) 636 88 639 (91) 704 66 728 (90) Klare Corredora de Seguros S.A. 6,415 599 7,579 (1,763) 8,303 724 8,586 (1,007) - - - - Santander Consumer Chile S.A. 693,992 633,177 49,348 11,467 505,059 452,528 39,951 12,580 - - - - Sociedad operadora de Tarjetas de Pago Santander Getnet Chile S.A. 16,448 1,185 16,273 (1,010) Santander Gestión de Recaudación y Cobranzas Ltda. 7,789 3,108 4,808 (127) 8,200 3,392 3,777 1,031 6,932 3,155 2,925 852 Bansa Santander S.A. 84,496 64,582 19,565 349 87,607 68,042 20,051 (486) 20,437 386 17,401 2,650 Multiplica Spa 4,336 47 4,476 (187) 4,480 4 4,480 (4) - - - - Total 1,040,914 763,830 269,657 7,427 2,228,682 1,972,044 239,990 16,648 258,617 71,272 170,296 17,049

Interest Income (Tables)

Interest Income (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of interest income (expense) [text block] [Abstract]
Schedule of income from interest	For the years ended December 31, 2020 2019 2018 Interest Inflation Prepaid fees Total Interest Inflation Prepaid fees Total Interest Inflation Prepaid fees Total Items MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Resale agreements 124 - - 124 718 - - 718 903 - - 903 Interbank loans 36 - - 36 1,263 - - 1,263 897 - - 897 Commercial loans 722,116 174,360 10,207 906,683 780,284 160,462 16,478 957,224 771,405 153,851 11,008 936,264 Mortgage loans 322,687 314,777 491 637,955 349,663 283,820 455 633,938 330,055 266,691 909 597,655 Consumer loans 564,363 338 5,245 569,946 593,705 384 8,107 602,196 579,929 439 6,166 586,534 Investment instruments 69,276 36,141 - 105,417 71,150 26,169 - 97,319 75,423 24,790 - 100,213 Other interest income 9,078 4,384 - 13,462 18,387 3,592 - 21,979 16,644 4,013 - 20,657 Interest income not including income from hedge accounting 1,687,680 530,000 15,943 2,233,623 1,815,170 474,427 25,040 2,314,637 1,775,256 449,784 18,083 2,243,123
Schedule of interest expense	For the years ended December 31, 2020 2019 2018 Interest Inflation Total Interest Inflation Total Interest Inflation Total Items MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Demand deposits (13,576) (1,526) (15,102) (14,018) (1,508) (15,526) (14,914) (1,371) (16,285) Repurchase agreements (1,899) - (1,899) (9,710) - (9,710) (6,439) - (6,439) Time deposits and liabilities (141,091) (20,876) (161,967) (335,307) (27,172) (362,479) (317,061) (35,284) (352,345) Interbank loans (45,103) - (45,103) (50,354) - (50,354) (39,971) - (39,971) Issued debt instruments (232,551) (140,095) (372,646) (250,512) (145,487) (395,999) (241,455) (133,227) (374,682) Other financial liabilities (637) (11) (648) (1,310) (33) (1,343) (2,698) (110) (2,808) Lease contracts (2,651) - (2,651) (2,965) - (2,965) - - - Other interest expense (9,576) (14,722) (24,298) (16,651) (11,300) (27,951) (6,929) (10,497) (17,426) Interest expense not including expenses from hedge accounting (447,084) (177,230) (624,314) (680,827) (185,500) (866,327) (629,467) (180,489) (809,956)
Schedule of income and expense from interest	For the years ended December 31, 2020 2019 2018 Items MCh$ MCh$ MCh$ Interest income not including income from hedge accounting 2,233,623 2,314,637 2,243,123 Interest expense not including expense from hedge accounting (624,314) (866,327) (809,956) Net Interest income (expense) from hedge accounting 1,609,309 1,448,310 1,433,167 Hedge accounting (net) (15,461) (31,346) (18,799) Total net interest income 1,593,848 1,416,964 1,414,368

Fees and Commissions (Tables)

Fees and Commissions (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of fee and commission income (expense) [text block] [Abstract]
Schedule of fees and commission	For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Fee and commission income Fees and commissions for lines of credits and overdrafts 7,428 10,315 6,624 Fees and commissions for guarantees and letters of credit 36,277 35,039 33,654 Fees and commissions for card services 196,308 225,702 218,903 Fees and commissions for management of accounts 34,825 35,949 33,865 Fees and commissions for collections and payments 23,242 33,355 40,077 Fees and commissions for intermediation and management of securities 11,272 10,154 10,147 Insurance brokerage fees 39,764 49,664 39,949 Office banking 15,119 13,655 15,921 Fees for other services rendered 44,072 47,331 45,633 Other fees earned 42,855 37,494 39,690 Total 451,162 498,658 484,463 For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Fee and commission expense Compensation for card operation (123,011) (171,513) (163,794) Fees and commissions for securities transactions (896) (1,001) (936) Office banking (2,078) (1,860) (4,096) Interbank services (24,957) (19,839) (14,413) Other fees (32,942) (17,359) (10,339) Total (183,884) (211,572) (193,578) Net fees and commissions income 267,278 287,086 290,885
Schedule of income and expences	Segments Revenue recognition calendar for ordinary As of December 31, 2020 Individuals Companies Global Others Total Transferred Transferred at a Accrual MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Commission income Commissions for lines of credit and overdrafts 6,334 690 398 6 7,428 7,428 - - Commissions for guarantees and letters of credit 11,304 17,505 7,112 356 36,277 36,277 - - Commissions for card services 187,098 6,620 2,568 22 196,308 47,073 149,235 - Commissions for account management 31,508 2,495 819 3 34,825 34,825 - - Commissions for collections, collections and payments 21,281 1,514 367 80 23,242 - 11,303 11,939 Commissions for intermediation and management of values 3,353 299 8,149 (529) 11,272 - 11,272 - Remuneration for insurance commercialization 39,764 - - - 39,764 - - 39,764 Office banking 10,393 4,077 649 - 15,119 - 15,119 - Other remuneration for services rendered 39,318 3,606 1,028 120 44,072 - 44,072 - Other commissions earned 18,948 11,716 12,850 (659) 42,855 - 42,855 - Total 369,301 48,522 33,940 (601) 451,162 125,603 273,856 51,703 Commission expenses Remuneration for card operation (118,255) (3,020) (1,070) (666) (123,011) - (68,550) (54,461) Commissions per transaction with securities - - (69) (827) (896) - (896) - Office banking (1,326) (434) (314) (4) (2,078) - (2,078) - Interbank services (16.073) (5,183) (3,663) (38) (24,957) (24,957) Other commissions (20,216) (1,550) (5,644) (5,532) (32,942) - (32,942) - Total (155,870) (10,187) (10,760) (7,067) (183,884) - (129,423) (54,461) Total Net commission income and expenses 213,431 38,335 23,180 (7,668) 267,278 125,603 144,433 (2,758) Segments Revenue recognition calendar for ordinary As of December 31, 2019 Individuals and Companies and Global Investment Others Total Transferred over Transferred at a Accrual model MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Commission income Commissions for lines of credit and overdrafts 6,123 935 3,240 17 10,315 10,315 - - Commissions for guarantees and letters of credit 11,553 17,531 5,842 113 35,039 35,039 - - Commissions for card services 218,635 6,042 950 75 225,702 41,347 184,355 - Commissions for account management 32,608 2,515 823 3 35,949 35,949 - - Commissions for collections, collections and payments 36,129 2,185 464 (5,423) 33,355 - 12,854 20,501 Commissions for intermediation and management of values 3,219 245 8,301 (1,611) 10,154 - 10,154 - Remuneration for insurance commercialization 49,664 - - - 49,664 - - 49,664 Office banking 9,280 3,782 606 (13) 13,655 - 13,655 - Other remuneration for services rendered 42,499 3,748 839 245 47,331 - 47,331 - Other commissions earned 12,462 10,727 14,293 12 37,494 - 37,494 - Total 422,172 47,710 35,358 (6,582) 498,658 122,650 305,843 70,165 Commission expenses Remuneration for card operation (168,024) (3,475) (321) 307 (171,513) - (171,513) - Commissions per transaction with securities - - (33) (968) (1,001) - (1,001) - Office banking (1,186) (389) (282) (3) (1,860) - (1,860) - Interbank services (12,776) (4,121) (2,912) (30) (19,839) (19,839) Other commissions (9,559) (1,013) (2,707) (4,080) (8,359) - (8,359) - Total (191,545) (8,998) (6,255) (4,774) (211,572) - (211,572) - Total Net commission income and expenses 230,627 38,712 29,103 (11,356) 287,086 122,650 94,271 70,165

Net Income (Expense) From Fin_2

Net Income (Expense) From Financial Operations (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of finance income (cost) [text block] [Abstract]
Schedule of income (expense) from financial operations	The detail of income (expense) from financial operations is as follows: For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Net gains on trading derivatives 42,704 (162,183) 38,217 Net gains on financial assets at fair value through profit or loss 1,671 11,878 9,393 Net gains on derecognition of financial assets measured at amortized cost 80,679 63,672 8,479 Sale of loans and accounts receivables from customers Current portfolio 48 63 (309) Charged-off portfolio (110) 3,248 709 Repurchase of issued bonds (*) (24,973) 3,073 (1,085) Other income (expense) from financial operations (9,237) 2,084 (2,230) Total income (expense) 90.800 (78,165) 53,174

Net Foreign Exchange Gain (Lo_2

Net Foreign Exchange Gain (Loss) (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of effect of changes in foreign exchange rates [text block] [Abstract]
Schedule of net foreign exchange income	For the years ended December 31, 2020, 2019 and 2018 net foreign exchange income is as follows: For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Net foreign exchange gain (loss) Net profit (loss) from currency exchange differences 90,133 (89,893) (212,618) Hedging derivatives (27,624) 362,374 252,275 Income from assets indexed to foreign currency (3,512) 7,376 12,251 Total 58,997 279,857 51,908

Expected Credit Losses Allowa_2

Expected Credit Losses Allowance (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of allowance for credit losses [text block] [Abstract]
Schedule of expected credit losses	As of December 31, 2020 and 2019, under the new credit risk model established by IFRS 9 the ECL allowance by stage recorded at income statements is as follows: For the year ended December 31, 2020 (*) Stage1 Stage2 Stage3 TOTAL Individual Collective Individual Collective Individual Collective MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Commercial loans 20,055 9,617 35,861 23,410 115,730 86,018 290,691 Mortgage loans 0 16,603 0 (5,966) 0 7,636 18,273 Consumer loans 0 19,024 0 (18,914) 0 161,466 161,576 Contingent loans 1,335 (1,600) 1,624 4,023 (14) 423 5,789 Loans and account receivable at FVOCI 1,253 - - - - - 1,253 Debt at FVOCI - 682 - - - - 682 Total 22,643 44,326 37,485 2,552 115,716 255,543 478,264 For the year ended December 31, 2019 Stage1 Stage2 Stage3 TOTAL Individual Collective Individual Collective Individual Collective MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Commercial loans (3,002) (4,930) (10,469) (8,686) (79,501) (33,657) (140,245) Mortgage loans - (1,177) - (4,998) - (8,237) (14,412) Consumer loans - (8,875) - (15,280) - (145,328) (169,483) Contingent loans 45 589 10 24 152 188 1,008 Loans and account receivable at FVOCI 5 - - - - - 5 Debt at FVOCI - (184) - - - - (184) Total (2,952) (14,577) (10,459) (28,940) (79,349) (187,034) (323,311) For the year ended December 31, 2018 Stage1 Stage2 Stage3 TOTAL Individual Collective Individual Collective Individual Collective MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Commercial loans 79 5,652 (2,891) (1,533) (96,131) (47,959) (142,783) Mortgage loans - 5,583 - 5,161 - 3,377 14,121 Consumer loans - 1,861 - 192 - (191,304) (189,251) Contingent loans (90) 1,214 11 (68) (225) (834) 8 Loans and account receivable at FVOCI 363 - 68 - - - 431 Debt at FVOCI - 66 - - - - 66 Total 352 14,376 (2,812) 3,752 (96,356) (236,720) (317,408) (*) Includes overlays for an amount of MCh$59,000. See Note 37, Risk management.

Personnel Salaries and Expens_2

Personnel Salaries and Expenses (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of expenses by nature [text block] [Abstract]
Schedule of personnel expenses	For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Personnel compensation 265,312 260,445 259,354 Bonuses or gratifications 77,046 78,534 72,728 Stock-based benefits (1,589) (315) (337) Seniority compensation 22,380 25,006 21,869 Pension plans 1,026 567 1,069 Training expenses 2,887 4,918 3,782 Day care and kindergarten 2,769 2,731 2,778 Welfare funds 6,531 6,644 6,040 Other personnel expenses 32,308 31,627 30,281 Total 408,670 410,157 397,564

Administrative Expenses (Tables

Administrative Expenses (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure Of Expenses By Nature 1 Explanatory [Abstract]
Schedule of administrative expenses	For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ General administrative expenses 142,848 124,896 145,241 Maintenance and repair of property, plant and equipment 20,300 19,214 20,962 Office lease - - 29,761 Equipment lease - - 55 Short term leases contracts 1,625 4,177 - Insurance payments 5,064 3,848 3,439 Office supplies 4,774 5,126 5,070 IT and communication expenses 68,436 52,017 44,209 Heating, and other utilities 5,455 2,848 4,849 Security and valuables transport services 12,365 12,187 12,168 Representation and personnel travel expenses 2,375 4,109 3,444 Judicial and notarial expenses 860 1,277 1,148 Fees for technical reports and auditing 8,460 7,643 10,020 Other general administrative expenses 13,134 12,450 10,116 Outsourced services 72,513 71,572 65,358 Data processing 38,032 31,921 32,360 Archive services 2,619 3,518 3,401 Valuation services 3,208 3,644 3,167 Outsourcing 6,177 10,139 9,936 Other 22,477 22,350 16,494 Board expenses 1,517 1,356 1,297 Marketing expenses 16,791 20,891 19,286 Taxes, payroll taxes, and contributions 16,781 14,897 13,907 Real estate taxes 2,214 1,954 1,730 Patents 2,135 1,913 1,896 Other taxes 5 5 7 Contributions to FMC (former SBIF) 12,427 11,025 10,274 Total 250,450 233,612 245,089

Depreciation, Amortization, a_2

Depreciation, Amortization, and Impairment (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of depreciation and amortisation expense [text block] [Abstract]
Schedule of depreciation, amortization and impairment charges	For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Depreciation and amortization Depreciation of property, plant, and equipment (56,311) (52,855) (54,987) Amortization of Intangible assets (25,384) (26,348) (24,293) Depreciation right of use assets (27,731) (26,889) - Total depreciation and amortization (109,426) (106,092) (79,280) Impairment of property, plant, and equipment - (1,013) (39) Impairment of right of use assets (638) (1,713) - Impairment of intangibles - - - Total impairment (638) (2,726) (39) Total (110,064) (108,818) (79,319)

Other Operating Income and Ex_2

Other Operating Income and Expenses (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of other operating income (expense) [text block] [Abstract]
Schedule of other operating income	For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Income from assets received in lieu of payment 5,934 5,613 7,106 Release of contingencies provisions (1) 503 - 12,020 Other income 1,769 7,388 4,003 Leases - - 222 Income from sale of property, plant and equipment (2) 865 2,456 2,490 Compensation from insurance companies due to damages (3) 702 4,681 144 Other 202 251 1,147 Total 8,206 13,001 23,129 (1) In accordance with IAS 37, the Bank recorded contingencies provisions, which in 2018 and 2020 were favorable to the Bank. (2) Legal cession of rights made by Bansa Santander S.A. which resulted in an income of Ch$2,122 million, as of December 31, 2018. (3) Mainly related to recoveries from fraud claims.
Schedule of other operating expenses	For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Allowances and expenses for assets received in lieu of payment 2,941 3,900 2,537 Provision on assets received in lieu of payment 1,456 1,828 816 Expenses for maintenance of assets received in lieu of payment 1,485 2,072 1,721 Credit card expenses 546 1,077 3,151 Customer services 1,559 2,456 3,635 Other expenses 72,760 41,870 23,019 Operating charge-offs 10,675 8,349 5,694 Life insurance and general product insurance policies (1) 32,987 21,205 9,964 Sale of property plant and equipment - 67 62 Retail association payment 326 343 898 Sale of participation on associates 20 126 - Expense on social commotion event - 1,823 - Leasing land tax (2) 3,174 - - Commercial representation expenses 3,501 256 - Non-recurrent expenses 6,622 - - Other 15,455 9,701 6,401 Total 77,806 49,303 32,342 (1) New Fraud Law became effective on 2020. (2) Annual Land Tax surcharge approved in the Tax Modernization Law of February 24, 2020 .

Transactions with Related Par_2

Transactions with Related Parties (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of related party [text block] [Abstract]
Schedule of loans and accounts receivable as well as contingent loans that correspond to related entities	As of December 31, 2020 2019 2018 Companies of the Group Associated companies Key personnel Other Companies of the Group Associated companies Key personnel Other Companies of the Group Associated companies Key personnel Other MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Loans and accounts receivable: Commercial loans 352,590 265 3,939 900 246,868 375 2,986 685 122,289 459 4,299 233 Mortgage loans - - 22,428 - - - 20,473 - - - 18,814 - Consumer loans - - 6,131 - - - 5,781 - - - 5,335 - Loans and accounts receivable: 352,590 265 32,498 900 246,868 375 29,240 685 122,289 459 28,448 233 Allowance for loan losses (1,138) (9) (137) (14) (122) (182) (179) (10) (308) (9) (116) (5) Net loans 351,452 256 32,361 886 246,746 193 29,061 675 121,981 450 28,332 228 Guarantees 3,323 - 27,203 442 462,513 - 23,918 288 442,854 - 22,893 7,171 Contingent loans: Personal guarantees - - - - - - - - - - - - Letters of credit 3,447 - - 93 4,112 - - 63 5,392 - 2,060 44 Guarantees 811 - - - 464,691 - - - 445,064 - 3,364 - Contingent loans: 4,258 - - 93 468,803 - - 63 450,456 - 5,424 44 Allowance for contingent loans (6) - - - (835) - - - (1) - (18) - Net contingent loans 4,252 - - 93 467,968 - - 63 450,455 - 5,406 44
Schedule of loan activity to related parties	As of December 31, 2020 2019 2018 Companies of the Group (*) Associated companies Key Personnel Other Companies of the Group (*) Associated companies Key Personnel Other Companies of the Group (*) Associated companies Key Personnel Other MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Opening balances as of January 1, 715,671 375 29,240 748 572,745 459 33,871 7,899 476,906 771 27,051 7,826 Loans granted 388,896 - 8,080 727 193,798 167 4,826 500 200,657 39 16,574 773 Loans payments (747,719) (110) (4,822) (482) (50,872) (251) (9,457) (7,651) (104,818) (351) (9,754) (700) Total 356,848 265 32,498 993 715,671 375 29,240 748 572,745 459 33,871 7,899 (*) Loans with non-controlled companies (not-consolidated) amount MCh$2,286, MCh$2,059 and MCh$122,289 as of December 31, 2020, 2019 and 2018, respectively.
Schedule of assets and liabilities with related parties	As of December 31, 2020 2019 2018 Companies of the Group Associated companies Key personnel Other Companies of the Group Associated companies Key personnel Other Companies of the Group Associated companies Key personnel Other MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Assets Cash and deposits in banks 703,069 - - - 171,816 - - - 189,803 - - - Trading investments - - - - - - - - - - - - Obligations under repurchase agreements Loans - - - - - - - - - - - Financial derivative contracts 978,696 186,038 33 7 2,058,715 218,610 - 55 748,632 105,358 - 9 Debt instrument at FVOCI - - - - - - - - - - - - Other assets 445,609 412,277 - - 185,317 210,579 - - 38,960 51,842 - - Liabilities Deposits and other demand liabilities 17,118 4,484 5,997 3,242 25,261 93,761 4,624 566 27,515 21,577 2,493 480 Obligations under repurchase agreements Loans 961,718 - 101 - 138,498 5,000 270 80 6,501 - 329 68 Time deposits and other time liabilities 1,409,404 100 4,706 864 1,183,235 282,171 4,246 2,204 2,585,337 - 3,189 838 Financial derivative contracts 1,137,502 354,108 - - 2,159,660 288,013 - 3 770,624 112,523 - - Interbank borrowing 544,291 - - - - - - - - - - - Issued debt instruments 349,002 - - - 363,154 - - - 335,443 - - - Other financial liabilities - - - - 6,231 - - - 6,807 - - - Other liabilities 1,210 4,484 5,997 3,242 8,130 146,164 - - 60,884 89,817 - -
Schedule of income (expense) recorded due to transactions with related parties	For the years ended December 31, 2020 2019 2018 Companies of the Group Associated Companies Key personnel Other Companies of the Group Associated companies Key personnel Other Companies of the Group Associated Companies Key personnel Other MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Income (expense) recorded Interest income and inflation-indexation adjustments (30,586) 21 1,202 10 (41,181) (5,235) 1,151 26 (53,256) (156) 1,252 508 Fee and commission income and expenses 46,823 22,596 152 24 28,274 14,499 232 28 91,178 7,826 305 22 Net income (expense) from financial operations and net foreign exchange gain (loss) (*) (390,737) 240,565 - - (586,318) (84,236) - - (566,677) 65,727 27 (12) Other operating income and expenses 492 (522) - - 406 (2,026) - - 42 1,388 - - Key personnel compensation and expenses - (31,961) - - - (37,377) - - - (40,683) - Administrative and other expenses (45,478) (16,763) - - (11,877) (47,757) - - (43,035) (50,764) - - Total (419,486) 245,897 (30,607) 34 (610,696) (124,755) (35,994) 54 (571,748) 24,021 (39,099) 518 (*) Primarily relates to derivative contracts used to financially cover exchange risk of assets and liabilities that cover positions of the Bank and its subsidiaries,
Schedule of payments to Board members and key management personnel	For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Personnel compensation 16,220 16,264 16,924 Board members’ salaries and expenses 1,452 1,358 1,230 Bonuses or gratifications 12,583 16,104 16,243 Stock-based benefits (1,589) (315) (337) Seniority compensation 1,079 2,378 4,202 Pension plans 1,026 567 1,069 Training expenses 87 37 210 Health funds 276 273 284 Other personnel expenses 827 711 858 Total 31,961 37,377 40,683 (*) Some of the executives that qualified for this benefit left the Group for different reasons, without complying with the requirements to receive the benefit, therefore the obligation amount decreased, which generated the reversal of provisions.
Schedule of composition of key personnel	Position N° of executives As of December 31, 2020 2019 2018 Director 11 10 11 Division manager 13 12 12 Manager 96 106 108 Total key personnel 120 128 131

Pension Plans (Tables)

Pension Plans (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of employee benefits [text block] [Abstract]
Schedule of actuarial hypothesis assumptions	The most significant actuarial hypotheses considered in the calculations were: Plans post-employment Plans post-employment 2020 2019 Mortality chart RV-2014 RV-2014 Termination of contract rates 5,0% 5,0% Impairment chart PDT 1985 PDT 1985
Schedule of post-employment benefits	Activity for post-employment benefits is as follows: As of December 31, 2020 2019 MCh$ MCh$ Plan assets 8,224 7,195 Commitments for defined-benefit plans For active personnel (7,551) (6,525) Incurred by inactive personnel - - Minus: Unrealized actuarial (gain) losses - - Balances at year end 673 670
Schedule of cash flow for post-employment benefits	Year’s cash flow for post-employment benefits is as follows: For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ a) Fair value of plan assets Opening balance 7,195 6,804 7,919 Expected yield of insurance contracts 385 333 353 Employer contributions 870 859 836 Actuarial (gain) losses - - - Premiums paid - - - Benefits paid (226) (801) (2,304) Fair value of plan assets at year end 8,224 7,195 6,804 b) Present value of obligations Present value of obligations opening balance (6,525) (5,958) (6,998) Net incorporation of Group companies - - - Service cost (1,026) (567) (1,069) Interest cost - - - Curtailment/settlement effect - - - Benefits paid - - - Past service cost - - - Actuarial (gain) losses - - - Other - - 2,109 Present value of obligations at year end (7,551) (6,525) (5,958) Net balance at year end 673 670 846
Schedule of plan expected profit	Plan expected profit: As of December 31, 2020 2019 2018 Type of expected yield from the plan’s assets UF + 2,50% annual UF + 2,50% annual UF + 2,50% annual Type of yield expected from the reimbursement rights UF + 2,50% annual UF + 2,50% annual UF + 2,50% annual
Schedule of plan associated expenses	Plan associated expenses: For the years ended December 31, 2020 2019 2018 MCh$ MCh$ MCh$ Current period service expenses 1,026 566 1,069 Interest cost - - - Expected yield from plan’s assets (385) (333) (353) Expected yield of insurance contracts linked to the Plan: - Extraordinary allocations - - - Actuarial (gain)/ losses recorded in the period - - - Past service cost - - - Other - - - Total 641 233 716

Fair Value of Financial Asset_2

Fair Value of Financial Assets and Liabilities (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of fair value measurement [text block] [Abstract]
Schedule of financial assets and liabilities	As of December 31, 2020 2019 Book value Fair value Book value Fair value MCh$ MCh$ MCh$ MCh$ Assets Financial derivative contracts 133,718 133,718 8,148,608 8,148,608 Financial assets held for trading 9.032.085 9,032,085 270,204 270,204 Loans and accounts receivable at amortized cost, net 33,303,100 36,921,368 31,775,420 34,602,793 Loans and accounts receivable at FVOCI, net 69,331 69,331 66,065 66,065 Debt instrument at FVOCI 7,162,542 7,162,542 4,010,272 4,010,272 Guarantee deposits (margin accounts) 608,359 608,359 314,616 314,616 Liabilities Deposits and interbank borrowings 31,471,283 32,047,227 26,010,067 26,200,921 Financial derivative contracts 9,018,660 9,018,660 7,390,654 7,390,654 Issued debt instruments and other financial liabilities 8,388,495 9,590,678 9,727,081 10,718,997 Guarantees received (margin accounts) 624,205 624,205 994,714 994,714
Schedule of assets and liabilities on recurrent basis	Fair value measurement As of December 31, 2020 Level 1 Level 2 Level 3 MCh$ MCh$ MCh$ MCh$ Assets Financial assets held for trading 133,718 132,246 1,472 - Loans and accounts receivable at FVOCI, net 69,331 - - 69,331 Debt instruments at FVOCI 7,162,542 7,145,285 16,731 526 Derivatives 9,032,085 - 9,024,484 7,601 Guarantee deposits (margin accounts) 608,359 - 608,359 - Total 17,006,035 7,277,531 9,651,046 77,458 Liabilities Derivatives 9,018,660 - 9,015,900 2,760 Guarantees received (margin accounts) 624,205 - 624,205 - Total 9,642,865 - 9,640,105 2,760 Fair value measurement As of December 31, 2019 Level 1 Level 2 Level 3 MCh$ MCh$ MCh$ MCh$ Assets Financial assets held for trading 270,204 270,204 - - Loans and accounts receivable at FVOCI, net 66,065 - - 66,065 Debt instruments at FVOCI 4,010,272 3,992,421 17,146 705 Derivatives 8,148,608 - 8,133,700 14,908 Guarantee deposits (margin accounts) 314,616 - 314,616 - Total 12,809,765 4,262,625 8,465,462 81,678 Liabilities Derivatives 7,390,654 - 7,387,704 2,950 Guarantees received (margin accounts) 994,714 - 994,714 - Total 8,385,368 - 8,382,418 2,950
Schedule of assets or liabilities which are not measured at fair value	Fair value measurement As of December 31, 2020 Level 1 Level 2 Level 3 MCh$ MCh$ MCh$ MCh$ Assets Loans and accounts receivable at amortized cost, net 36,921,368 - - 36,921,368 Total 36,921,368 36,921,368 Liabilities Deposits and interbank borrowings 32,047,227 - 17,486,334 14,560,893 Issued debt instruments and other financial liabilities 9,590,678 - 9,590,678 - Total 41,637,905 - 27,077,012 14,560,893 Fair value measurement As of December 31, 2019 Level 1 Level 2 Level 3 MCh$ MCh$ MCh$ MCh$ Assets Loans and accounts receivable at amortized cost, net 34,602,793 - - 34,602,793 Total 34,602,793 - - 34,602,793 Liabilities Deposits and interbank borrowings 26,200,921 - 15,903,489 10,297,432 Issued debt instruments and other financial liabilities 10,718,997 - 10,718,997 - Total 36,919,918 - 26,622,486 10,297,432
Schedule of financial instruments classified as Level 3	As of December 31, 2020 Instrument Level 3 Valuation technique Main unobservable Impacts (in MCh$) Impacts (in MCh$) Derivatives Present Value method Curves on TAB (1) (1.3) (1.3) Debt instruments at FVOCI Internal rate of return method BR UF (2) - - As of December 31, 2019 Instrument Level 3 Valuation technique Main unobservable Impacts Impacts (in MCh$) Derivatives Present Value method Curves on TAB (1) (2.3) 2.3 Debt instruments at FVOCI Internal rate of return method BR UF (2) - -
Schedule of assets and liabilities measured at fair value on a recurrent basis using unobserved significant entries (Level 3)	Assets Liabilities MCh$ MCh$ As of January 1, 2020 81,678 2,950 Total realized and unrealized profits (losses) Included in statements of income (196) 1,012 Included in other comprehensive income 3,087 - Purchases, issuances, and loans (net) - - Level transfer (7,111) (1,202) As of December 31, 2020 77,458 2,760 Total profits or losses included in comprehensive income for 2020 that are attributable to change in unrealized profit (losses) related to assets or liabilities as of December 31, 2019 (4,220) (190) Assets Liabilities MCh$ MCh$ As of January 1, 2019 80,781 795 Total realized and unrealized profits (losses) Included in statements of income 827 2,155 Included in other comprehensive income 70 - Purchases, issuances, and loans (net) - - Level transfer - - As of December 31, 2019 81,678 2,950 Total profits or losses included in comprehensive income for 2019 that are attributable to change in unrealized profit (losses) related to assets or liabilities as of December 31, 2018 897 2,155
Schedule of financial instruments subject to compensation	Linked financial instruments, compensated in balance Financial instruments Gross Compensated in Net amount Remains of unrelated Amount in Assets Ch$ Million Ch$ Million Ch$ Million Ch$ Million Financial derivative contracts (*) 8.840.436 - 8.840.436 191,649 9,032,085 Investments under resale agreements - - - Loans and accounts receivable at amortized cost, net - - - Loans and accounts receivable at FVOCI, net - - - 33,303,100 33,303,100 Total 8.840.436 - 8.840.436 33,494,749 42,335,185 Liabilities Financial derivative contracts (*) 8,922,079 - 8,922,079 96,581 9,018,660 Investments under resale agreements 969,808 - 969,808 - 969,808 Deposits and interbank borrowings - - - 31,471,283 31,471,283 Total 9,891,887 - 9,891,887 31,567,864 41,459,751 Linked financial instruments, compensated in balance Financial instruments Gross Compensated in Net amount Remains of unrelated Amount in Assets Ch$ Million Ch$ Million Ch$ Million Ch$ Million Financial derivative contracts 8,148,151 - 8,148,151 457 8,148,608 Investments under resale agreements - - Loans and accounts receivable at amortized cost, net - 31,775,420 31,775,420 Loans and accounts receivable at FVOCI, net 66,065 - 66,065 66,065 Total 8,214,216 - 8,148,151 31,841,942 39,990,093 Liabilities Financial derivative contracts 7,388,145 - 7,388,145 2,509 7,390,654 Investments under resale agreements 380,055 - 380,055 - 380,055 Deposits and interbank borrowings - - - 26,010,067 26,010,067 Total 7,768,200 - 7,768,200 26,012,576 33,780,776
Schedule of credit exposure in its financial derivative operations	As of December 31, 2020 As of December 31, 2019 Financial derivative contracts Assets Liability Assets Liability MCh$ MCh$ MCh$ MCh$ Financial derivative contracts with collateral agreement threshold equal to zero 8,127,263 7,900,539 7,478,837 6,748,219 Financial derivative contracts with non-zero threshold collateral agreement 471,529 606,661 532,298 517,814 Financial derivative contracts without collateral agreement 433,293 511,460 137,472 124,621 Total 9,302,085 9,018,660 8,148,607 7,390,654

Risk Management (Tables)

Risk Management (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of financial risk management [text block] [Abstract]
Schedule of high, low and average levels	VaR 2020 USDMM 2019 USDMM Consolidated: High 12.82 15.78 Low 1.94 1.33 Average 4.45 3.06 Fixed-income investments: High 11.96 9.77 Low 1.50 1.18 Average 3.19 2.33 Variable-income investments High 0.01 - Low - 0.01 Average - - Foreign currency investments High 6.47 6.05 Low 0.71 0.10 Average 2.85 1.60
Schedule of market risk	2020 2019 Effect on Effect on Effect on Effect on Financial management portfolio – local currency (MCh$) Loss limit 100,000 329,275 100,000 275,000 High 66,504 302,263 32,719 273,473 Low 26,492 214,596 12,686 145,338 Average 45,380 255,070 24,719 228,772 Financial management portfolio – foreign currency (Th$US) Loss limit 32 53 30 75 High 19 47 20 35 Low 2 12 5 1 Average 5 33 12 12 Financial management portfolio – consolidated (in MCh$) Loss limit 100,000 329,275 100,000 275,000 High 67,584 286,436 34,462 271,989 Low 25,111 210,706 15,236 143,836 Average 46,044 246,292 27,918 227,303
Schedule of exposures of financial assets and liabilities impacted by IBOR reform	Loans and Deposits Debt instruments Financial derivative Financial derivative (Liabilities) MCh$ MCh$ MCh$ MCh$ MCh$ 362,331 582,979 200,301 614,035 483,789
Schedule of quality assets and its related provision	December 31, 2020 Individually assessed Commercial Portfolio Stage 1 Stage 2 Stage 3 Total Individual Percentage Stage 1 Stage 2 Stage 3 Total ECL Percentage MCh$ MCh$ MCh$ MCh$ % MCh$ MCh$ MCh$ MCh$ % A1 45,862 - - 45,862 0.13% 3 - - 3 0.00% A2 1,095,506 3,265 - 1,098,771 3.20% 900 54 - 954 0.09% A3 1,863,480 19,658 - 1,883,138 5.48% 3,318 339 - 3,657 0.35% A4 2,632,793 42,529 - 2,675,322 7.79% 7,329 606 - 7,935 0.77% A5 2,538,748 164,341 232 2,703,321 7.87% 11,498 4,618 78 16,194 1.56% A6 1,588,410 289,460 53 1,877,923 5.47% 16,541 14,010 53 30,604 2.95% B1 - 715,348 - 715,348 2.08% - 25,679 - 25,679 2.48% B2 - 161,239 233 161,472 0.47% - 9,566 138 9,704 0.94% B3 - 65,684 695 66,379 0.19% - 3,764 434 4,198 0.40% B4 - 73,248 49,430 122,678 0.36% - 3,008 21,014 24,022 2.32% C1 - 29,863 138,171 168,034 0.49% - 2,201 48,365 50,566 4.88% C2 - 12,282 69,491 81,773 0.24% - 926 27,021 27,947 2.70% C3 - 1,550 55,378 56,928 0.17% - 86 15,603 15,689 1.51% C4 - 2,227 48,177 50,404 0.15% - 143 21,038 21,181 2.04% C5 - 3,981 36,822 40,803 0.12% - 267 20,397 20,664 1.99% C6 - 5,040 131,384 136,424 0.40% - 185 107,364 107,549 10.37% Subtotal 9,764,799 1,589,715 530,066 11,884,580 34.61% 39,589 65,452 261,505 366,546 35.35% Collectively assessed Stage 1 Stage 2 Stage 3 Total Group Percentage Stage 1 Stage 2 Stage 3 Total ECL Percentage MCh$ MCh$ MCh$ MCh$ % MCh$ MCh$ MCh$ MCh$ % Commercial 4,493,999 228,591 380,019 5,102,609 14.86% 40,943 44,315 193,268 278,526 26.86% Mortgage 11,518,363 392,372 501,090 12,411,825 36.14% 25,065 8,441 79,016 112,522 10.85% Consumer 4,439,163 236,595 265,121 4,940,879 14.39% 88,825 31,732 158,642 279,199 26.93% Subtotal 20,451,525 857,558 1,146,230 22,455,313 65.39% 154,833 84,488 430,926 670,247 64.65% Total 30,216,324 2,447,273 1,676,296 34,339,893 100.00% 194,422 149,940 692,431 1,036,793 100.00% December 31, 2019 Individually assessed Commercial Stage 1 Stage 2 Stage 3 Total Individual Percentage Stage 1 Stage 2 Stage 3 Total ECL Percentage MCh$ MCh$ MCh$ MCh$ % MCh$ MCh$ MCh$ MCh$ % A1 99,042 - - 99,042 0.30% 2 - 2 0.00% A2 907,659 37 - 907,696 2.78% 443 - 443 0.05% A3 2,418,990 61 - 2,419,051 7.41% 2,617 - 2,617 0.29% A4 3,262,671 7,184 - 3,269,855 10.01% 4,399 22 4,421 0.49% A5 2,188,717 22,163 - 2,210,880 6.77% 7,618 515 8,133 0.91% A6 1,086,401 47,157 487 1,134,045 3.47% 6,461 1,410 208 8,079 0.90% B1 - 603,201 - 603,201 1.85% - 12,641 - 12,641 1.41% B2 - 82,781 560 83,341 0.26% - 3,773 205 3,978 0.44% B3 - 85,034 817 85,851 0.26% - 3,367 261 3,628 0.40% B4 - 83,039 50,662 133,701 0.41% - 4,085 21,910 25,995 2.90% C1 - 45,433 113,004 158,437 0.48% - 3,516 50,440 53,956 6.02% C2 - 8,865 66,965 75,830 0.23% - 614 28,504 29,118 3.25% C3 - 15,762 32,839 48,601 0.15% - 221 11,281 11,502 1.28% C4 - 2,405 38,967 41,372 0.13% - 170 20,039 20,209 2.26% C5 - 847 44,057 44,904 0.14% - 43 27,586 27,629 3.08% C6 - 998 52,649 53,647 0.16% - 12 35,732 35,744 3.99% Subtotal 9,963,480 1,004,967 401,007 11,369,454 34.80% 21,540 30,389 196,166 248,095 27.69% Collectively assessed Stage 1 Stage 2 Stage 3 Total Group Percentage Stage 1 Stage 2 Stage 3 Total ECL Allowance Percentage MCh$ MCh$ MCh$ MCh$ % MCh$ MCh$ MCh$ MCh$ % Commercial 3,839,143 240,100 413,628 4,492,871 13.75% 35,887 25,555 197,032 258,474 28.84% Mortgage 10,275,966 457,948 529,081 11,262,995 34.47% 8,446 14,509 78,104 101,059 11.28% Consumer 4,963,047 292,718 290,430 5,546,195 16.98% 67,396 50,808 170,263 288,467 32.19% Subtotal 19,078,156 990,766 1,233,139 21,302,061 65.20% 111,729 90,872 445,399 648,000 72.31% Total 29,041,636 1,995,733 1,634,146 32,671,515 100.00% 133,269 121,261 641,565 896,095 100.00%
Schedule of net losses from operational risks	Collectively assessed Individually assessed Mortgages Other loans Revolving (Credit cards) Collectively assessed SME Individually assessed SME Middle market Corporate and Investment Banking 39.57% 39.11% 15.73% 39.11% 22.69% 4.5% Santander Group criteria Collectively assessed Individually assessed Mortgages Other loans Revolving (Credit cards) Collectively assessed SME Individually assessed SME Middle market Corporate and Investment Banking Irregular portfolio > 30 days Irregular portfolio > 30 days Irregular portfolio > 30 days Irregular portfolio > 30 days Irregular portfolio > 30 days Irregular portfolio > 30 days Irregular portfolio > 30 days Restructured marked for monitoring Restructured marked for monitoring Restructured marked for monitoring Restructured marked for monitoring Restructured marked for monitoring Restructured marked for monitoring Restructured marked for monitoring Clients considered to be substandard or in incompliance (pre-legal action) Clients considered to be substandard or in incompliance (pre-legal action) Clients considered to be substandard or in incompliance (pre-legal action)
Schedule of allowance and exposure at default (EAD) of the loans	2020 2019 MCh$ MCh$ Loans and account receivable 224,087 128,161 Allowance for ECL 119,537 53,741
Schedule of modified loans	As of December 31, 2020 As of December 31, 2019 Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Gross carrying amount 30,216,324 2,447,273 1,676,296 34,339,893 29,041,636 1,995,733 1,634,146 32,671,515 Modified loans - 799,572 886,021 1,685,593 - 512,529 611,316 1,123,845 % - 36.67% 52.86% 4,91% - 25.68% 37.41% 3.44% ECL allowance 194,422 149,940 692,431 1,036,793 133,269 121,261 641,565 896,095 Modified loans 33,118 409,485 442,603 - 36,329 242,649 278,978 % 22.09% 59.14% 42.69% - 29.96% 37.82% 31.13%
Schedule of classification of relief measures	COVID-19 measures As of December 31, 2020 MCh$ Fogape loans 2,076,119 Payment holiday 9,098,028 Payment holiday – current 734,986 Payment holiday - expired 8,363,042
Schedule of residual maturity over measured that have not expired	Residual maturity <= 6 <= 12 <= 2 > 2 year MCh$ MCh$ MCh$ MCh$ MCh$ Fogape loans 2,076,119 - - 214,400 1,861,719 Payment holiday – current 734,986 722,746 7,861 4,379 -
Schedule of macro economical forward	Average estimates 2020 - 2021 Unfavorable Unfavorable Base Favorable Favorable Official interest rate 0.25% 0.50% 1.59% 3.20% 4.42% Unemployment rate 7.31% 6.96% 6.50% 6.04% 5.70% Housing Price growth (1.70)% 1.04% 4.67% 8.30% 11.04% GDP growth (1.16)% 0.67% 3.12% 5.56% 7.40% Consumer Price Index (0.26)% 1.07% 2.82% 4.57% 5.90%
Schedule of probabilities	Local scenario Global scenario Probability Probability Favorable scenario 2 10% Favorable scenario 1 30% Favorable scenario 1 15% Base scenario 40% Base scenario 50% Unfavorable scenario 1 30% Unfavorable scenario 1 15% Unfavorable scenario 2 10%
Schedule of allowance sensibility	December 31, 2020 December 21,2019 MCh$ MCh$ Reported ECL allowance 1,036,793 896,095 Gross carrying amount 34,339,893 32,671,515 Reported ECL Coverage 3.02% 2.74% ECL amount by scenarios Favorable scenarios 2 876,654 797,501 Favorable scenarios 1 930,044 835,956 Base scenarios 981,671 884,480 Unfavorable scenarios 2 1,047,127 929,802 Unfavorable scenarios 2 1,083,371 962,437 Coverage ratio by scenarios Favorable scenarios 2 2.55% 2.44% Favorable scenarios 1 2.71% 2.56% Base scenarios 2.86% 2.71% Unfavorable scenarios 2 3.05% 2.85% Unfavorable scenarios 2 3.15% 2.95%
Schedule of risk concentration	December 31, 2020 December 31, 2019 (*) Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Commercial loans Manufacturing 1,180,220 130,361 67,640 1,378,221 1,110,484 107,356 67,974 1,285,814 Mining 265,195 161,631 6,789 433,615 280,297 123,005 3,739 407,041 Electricity, gas, and water 349,849 27,848 6,577 384,274 309,941 22,907 8,196 341,044 Agriculture and livestock 1,024,795 233,552 87,517 1,345,864 1,020,857 172,984 93,440 1,287,281 Forest 141,892 23,463 13,820 179,175 132,483 17,035 15,689 165,207 Fishing 209,182 20,128 4,842 234,152 223,980 24,879 7,695 256,554 Transport 622,161 97,624 58,076 777,861 665,570 64,115 34,192 763,877 Communications 294,957 28,433 7,725 331,115 206,660 28,122 6,168 240,950 Construction (*) 811,807 61,828 85,734 959,369 782,265 85,435 106,568 974,268 Commerce 2,549,770 223,884 89,684 2,863,338 2,655,982 110,326 30,107 2,796,415 Services 3,506,443 393,319 239,535 4,139,297 2,971,563 190,097 204,472 3,366,132 Other 3,302,527 416,235 242,146 3,960,908 3,442,541 298,806 236,395 3,977,742 Subtotal 14,258,798 1,818,306 910,085 16,987,189 13,802,623 1,245,067 814,635 15,862,325 Mortgage loans 11,518,363 392,372 501,090 12,411,825 10,275,966 457,948 529,081 11,262,995 Consumer loans 4,439,163 236,595 265,121 4,940,879 4,963,047 292,718 290,430 5,546,195 Total 30,216,324 2,447,273 1,676,296 34,339,893 29,041,636 1,995,733 1,634,146 32,671,515 (*) In 2019 we improved the classification of our construction loans, reassigning loans for real estate rental investment companies to services
Schedule of financial assets and associated collateral	As of December 31, 2020 2019 Maximum exposure to credit risk Collateral Net exposure Associated ECL Maximum exposure to credit risk Collateral Net Associated ECL MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Commercial loans 17,057,874 9,887,154 7,170,720 646,426 15,928,491 8,180,015 7,748,476 506,670 Mortgage loans 12,411,825 11,931,235 480,590 112,522 11,262,995 10,725,604 537,391 101,059 Consumer Loans 4,940,879 653,066 4,287,813 279,199 5,546,195 748,577 4,797,618 288,467 Total 34,410,578 22,471,455 11,939,123 1,038,147 32,737,681 19,654,196 13,083,485 896,196 (*) Includes Loans and account receivable at FVOCI
Schedule of financial assets and off-balance sheet commitments	As of December 31, 2020 2019 Amount of exposure Amount of exposure Note MCh$ MCh$ Deposits in banks 4 2,137,891 2,693,342 Cash items in process of collection 4 452,963 355,062 Financial derivative contracts 7 9,032,085 8,148,608 Financial assets held for trading 5 133,718 270,204 Loans and account receivable at amortized cost / Loans and account receivable at FVOCI 8/ 9 33,372,431 31,841,485 Debt instrument at fair value through other comprehensive income 10 7,162,542 4,010,272 Off-balance commitments: Letters of credit issued 165,119 140,572 Foreign letters of credit confirmed 82,779 70,192 Performance guarantees 1,090,643 1,929,894 Available credit lines 8,391,414 8,732,422 Personal guarantees 441,508 451,950 Other irrevocable credit commitments 406,234 485,991 Total 62,869,327 59,129,994
Schedule of fair value of derivative instruments	Country Classification Derivative Instruments Deposits Loans Financial Total US$ millions Colombia 2 0.81 - - - 0.81 Italy 2 - 3.36 0.13 - 3.49 Mexico 2 9.86 0.03 - - 9.89 Panama 2 5.77 - - - 5.77 Peru 2 1.61 - - - 1.61 Total 18.05 3.39 0.13 - 21.57 Counterpart Country Classification Derivative MUSD Deposits Loans Financial Exposure US$ millions Banco Santander España (*) Spain 1 176.34 139.90 - - 316.24 Santander UK UK 1 20.95 0.05 - - 21.00 Banco Santander Mexico Mexico 2 9.88 0.03 - - 9.91 Santander Group 207.17 139.98 - - 347.15 (*) We have included our exposure to Santander’s branches in New York and Hong Kong as exposure to Spain.
Schedule of security interests, collateral, or credit improvements	As of December 31, 2020 2019 MCh$ MCh$ Non-impaired financial assets: Properties/mortgages 25,424,161 23,371,510 Investments and others 2,306,062 2,785,219 Impaired financial assets: Properties/ mortgages 1,548,568 1,245,971 Investments and others 65,668 565,951 Total 29,344,459 27,968,651
Schedule of breakdown of bank's liquid assets by levels	As of December 31, 2020 2019 MCh$ MCh$ Balance as of: Cash and cash equivalent 988,320 1,305,534 Level 1 liquid assets (1) 2,490,810 2,452,599 Level 2 liquid assets (2) 12,681 15,105 Total liquid assets 3,491,811 3,773,238 (1) Includes instruments issued by the Central Bank of Chile or other central banks with a AAA rating, instruments issued by the Chilean government or other sovereign with a AAA rating and instruments issued by development banks with a AAA rating. Assets encumbered through repurchase agreements are deducted from the liquidity portfolio including those left as collateral under the FCIC funding program with the Central Bank of Chile. (2) Includes instruments issued by governments, central banks and development banks of foreign countries with a risk rating of A- to AA+ and mortgage bonds issued by Chilean banks that are acceptable at the Chilean Central Bank’s repo window.
Schedule of exposure to liquidity risk	As of December 31, 2020 % 2019 % 30 days 30 63 30 days foreign currency 15 - 90 days 32 79
Schedule of breakdown by maturity	As of December 31, 2020 Demand Up to 1 month Between 1 and 3 months Between 3 and 12 months Subtotal up to 1 year Between 1 and 3 years Between 3 and 5 years More than 5 years Subtotal after 1 year Total MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Obligations under repurchase agreements - 969,808 - - 969,808 - - - - 969,808 Checking accounts, time deposits and other time liabilities 15,082,442 5,843,682 2,912,985 1,434,246 25,273,355 163,053 44,384 23,523 230,960 25,504,315 Financial derivatives contracts - 386,690 445,376 931,358 1,763,424 1,552,482 1,708,509 3,994,245 7,255,236 9,018,660 Interbank borrowings 16,832 238,414 222,992 855,434 1,333,672 1,140,426 3,854,501 - 4,994,927 6,328,599 Issue debt instruments - 344,732 447,117 343,156 1,135,005 1,813,341 2,499,560 2,756,271 7,069,172 8,204,177 Lease liabilities 144,478 38,148 1,375 27 184,028 89 105 96 290 184,318 Other financial liabilities - - - 25,526 25,526 44,933 35,679 43,447 124,059 149,585 Subtotal 15,243,752 7,821,474 4,029,845 3,589,746 30,684,818 4,714,324 8,142,738 6,817,583 19,674,644 50,359,462 Contractual interest payments 86,195 18,938 72,710 242,462 420,305 143,531 137,902 25,676 307,109 727,413 Total 15,329,947 7,840,412 4,102,555 3,832,208 31,105,122 4,857,855 8,280,640 6,843,258 19,981,753 51,086,875 Other Commercial Commitments Up to 1 Between 1 Between 3 Between 1 More than Total MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Performance guarantee 114,653 181,399 437,835 350,136 6,620 1,090,643 Confirmed foreign letters of credit 18,247 48,056 16,163 313 - 82,779 Letters of credit issued 42,089 83,764 36,201 3,065 - 165,119 Pledges and other commercial commitments 33,588 29,958 367,164 10,798 - 441,508 Total other commercial commitments 208,577 343,177 857,363 364,312 6,620 1,780,050 As of December 31, 2019 Demand Up to 1 month Between 1 and 3 months Between 3 and 12 months Subtotal up to 1 year Between 1 and 3 years Between 3 and 5 years More than 5 years Subtotal after 1 year Total MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Obligations under repurchase agreements - 380,055 - - 380,055 - - - - 380,055 Checking accounts, time deposits and other time liabilities 10,439,705 5,184,567 4,905,414 2,417,703 22,947,389 357,856 163,121 21,883 542,860 23,490,249 Financial derivatives contracts - 422,749 427,825 951,684 1,802,258 1,253,280 1,180,948 3,154,168 5,588,396 7,390,654 Interbank borrowings 94 363,560 624,167 1,141,824 2,129,645 387,936 2,237 - 390,173 2,519,818 Issue debt instruments - 285,159 759,519 1,044,674 2,089,352 2,394,850 2,042,292 2,974,229 7,411,371 9,500,723 Lease liabilities - - - 26,061 26,061 45,978 36,393 50,062 132,433 158,494 Other financial liabilities 161,021 5,155 30,969 28,888 226,033 83 99 143 325 226,358 Subtotal 10,600,820 6,641,245 6,747,894 5,610,834 29,600,793 4,439,983 3,425,090 6,200,485 14,065,558 43,666,351 Contractual interest payments 10,473 148,731 267,994 1,727,401 2,154,599 1,720,990 1,653,500 3,101,084 6,475,574 8,630,173 Total 10,611,293 6,789,976 7,015,888 7,338,235 31,755,392 6,160,973 5,078,590 9,301,569 20,541,132 52,296,524 Other Commercial Commitments Up to 1 Between 1 Between 3 Between 1 More than Total MCh$ MCh$ MCh$ MCh$ MCh$ MCh$ Performance guarantee 144,364 544,370 899,437 312,559 22,292 1,923,022 Confirmed foreign letters of credit 25,491 1,808 11,306 31,587 - 70,192 Letters of credit issued 30,555 348 33,439 70,924 - 135,266 Pledges and other commercial commitments 30,357 9,009 317,824 94,561 - 451,751 Total other commercial commitments 230,767 555,535 1,262,006 509,631 22,292 2,580,231
Schedule of net losses from operational risks	As of December 31, Net losses from operational risks 2020 2019 Fraud 4,703 3,941 Labor related 443 461 Client / product related 250 653 Damage to fixed assets (2,592) 3,588 Business continuity / Systems 1,570 234 Processing 3,992 2,106 Total 8,366 10,983
Schedule of levels of basic capital and effective net equity	Ratio As of December 31, As of December 31, 2020 2019 2020 2019 MCh$ MCh$ % % Basic capital 3,567,916 3,390,823 6.69 6.96 Regulatory capital 5,143,843 4,304,401 15.37 12.86

Non Current Assets Held for S_2

Non Current Assets Held for Sale (Tables)	12 Months Ended
	Dec. 31, 2020
Non Current Assets Held For Sale [Abstract]
Schedule of other assets as assets held for sale	As of December 31, 2020 2019 Participation Assets Income Assets Income % MCh$ MCh$ MCh$ MCh$ Transbank 25.00 19,093 - 19,093 1,442 Nexus - - - 357 136 Redbanc 33.43 2,943 - 2,943 121 Total 22.036 - 22,393 1,699

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Summary of Significant Accounting Policies (Details) [Line Items]
Foreign exchange rate		747.37
Incremental interest rate	1.45%
Fogape's annual sales, description	The largest measure was to provide additional funds to the Guarantee Fund for Small Companies (Fogape), a state fund that guarantees loans, leases and other credits provided to small businesses, extend Fogape’s coverage to companies with annual sales of up to UF 1 million and further amend the rules and regulations governing Fogape to encourage banks to provide lending to small businesses. Under Fogape’s new regulations, domestic banks, including us, may provide loans with preferential interest rates equal to the MPR plus 3% and terms of up to 48 months to eligible companies in an aggregate amount equal to up to 3 months of a company’s sales and receive a guarantee from Fogape for between 60% and 85% of each loan (“Fogape loans”). Such loans must have a 6-month grace period before a company must begin paying the loan. In addition, companies that receive loans guaranteed by Fogape pursuant to these new regulations, will also have payment holiday for all other outstanding loans until a period of 6 months.
Average cost to sale of assets	3.20%	3.10%
Percentage of net income	0.30	0.30
CLF [Member]
Summary of Significant Accounting Policies (Details) [Line Items]
Foreign exchange rate	29,070.33	28,309.94
Percentage of inflation	2.70%	2.70%
USD [Member]
Summary of Significant Accounting Policies (Details) [Line Items]
Foreign exchange rate	1
Banco Santander-Chile [Member] | Banco Santander Spain [Member]
Summary of Significant Accounting Policies (Details) [Line Items]
Proportion of ownership interest in subsidiary	99.50%
Teatinos Siglo XXi inversiones Ltda [Member] | Banco Santander Spain [Member]
Summary of Significant Accounting Policies (Details) [Line Items]
Proportion of ownership interest in subsidiary	100.00%
Santander-Chile Bank [Member] | Banco Santander Spain [Member]
Summary of Significant Accounting Policies (Details) [Line Items]
Proportion of ownership interest in subsidiary	67.18%

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Details) - Schedule of subsidiaries		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Santander Corredora de Seguros Limitada [Member]
Summary of Significant Accounting Policies (Details) - Schedule of subsidiaries [Line Items]
Name of the Subsidiary				Santander Corredora de Seguros Limitada
Main Activity				Insurance brokerage
Country				Santiago, Chile
Direct interest Owned		99.75%	99.75%	99.75%
Indirect interest Owned		0.01%	0.01%	0.01%
Total interest Owned		99.76%	99.76%	99.76%
Santander Corredores de Bolsa Limitada [Member]
Summary of Significant Accounting Policies (Details) - Schedule of subsidiaries [Line Items]
Name of the Subsidiary				Santander Corredores de Bolsa Limitada
Main Activity				Financial instruments brokerage
Country				Santiago, Chile
Direct interest Owned		50.59%	50.59%	50.59%
Indirect interest Owned		0.41%	0.41%	0.41%
Total interest Owned		51.00%	51.00%	51.00%
Santander Asesorias Financieras Limitada [Member]
Summary of Significant Accounting Policies (Details) - Schedule of subsidiaries [Line Items]
Name of the Subsidiary	[1]			Santander Asesorias Financieras Limitada (1)
Main Activity	[1]			Securities brokerage
Country	[1]			Santiago, Chile
Direct interest Owned	[1]	99.03%	99.03%	99.03%
Indirect interest Owned	[1]
Total interest Owned	[1]	99.03%	99.03%	99.03%
Santander S.A. Sociedad Securitizadora [Member]
Summary of Significant Accounting Policies (Details) - Schedule of subsidiaries [Line Items]
Name of the Subsidiary				Santander S.A. Sociedad Securitizadora
Main Activity				Purchase of credits and issuance of debt instruments
Country				Santiago, Chile
Direct interest Owned		99.64%	99.64%	99.64%
Indirect interest Owned
Total interest Owned		99.64%	99.64%	99.64%
Klare Corredora de Seguros S.A. [Member]
Summary of Significant Accounting Policies (Details) - Schedule of subsidiaries [Line Items]
Name of the Subsidiary	[2]			Klare Corredora de Seguros S.A. (2)
Main Activity	[2]			Insurance brokerage
Country	[2]			Santiago, Chile
Direct interest Owned	[2]	50.10%	50.10%
Indirect interest Owned	[2]
Total interest Owned	[2]	50.10%	50.10%
Santander Consumer Chile S.A. [Member]
Summary of Significant Accounting Policies (Details) - Schedule of subsidiaries [Line Items]
Name of the Subsidiary	[3]			Santander Consumer Chile S.A. (3)
Main Activity	[3]			Financing
Country	[3]			Santiago, Chile
Direct interest Owned	[3]	51.00%	51.00%
Indirect interest Owned	[3]
Total interest Owned	[3]	51.00%	51.00%
Sociedad operadora de Tarjetas de Pago Santander Getnet Chile S.A. [Member]
Summary of Significant Accounting Policies (Details) - Schedule of subsidiaries [Line Items]
Name of the Subsidiary	[4]			Sociedad operadora de Tarjetas de Pago Santander Getnet Chile S.A. (4)
Main Activity	[4]			Card operator
Country	[4]			Santiago, Chile
Direct interest Owned	[4]	99.99%
Indirect interest Owned	[4]	0.01%
Total interest Owned	[4]	100.00%
[1]	On December 18, 2019, Santander Agente de Valores Limitada changes its business name and the company’s object, to Santander Asesorías Financieras Limitada, and offering financial advice.
[2]	On October 19, 2019 Klare Corredora de Seguros S.A. was created as a digital insurance brokerage and supporting banking business company and thus subject to banking regulations. The Banks owns the 50,10% of the company’s capital share.
[3]	On November 15, 2019, Financial Market Commission (FMC) authorized Banco Santander to acquire the 51% of the Santander Consumer Chile S.A. capital share from SK Berge (49%) and Banco Santander S.A. (2%). The sale was completed on November 27, 2019.
[4]	On July 6, 2020, the registration of a new subsidiary and business support company named “Sociedad Operadora de Tarjeta de Pago Santander Getnet Chile S.A” was made.

Summary of Significant Accoun_5

Summary of Significant Accounting Policies (Details) - Schedule of associates		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Redbanc S.A. [Member]
Summary of Significant Accounting Policies (Details) - Schedule of associates [Line Items]
Associates	[1]	Redbanc S.A. (*)
Main activity	[1]	ATM services
Place of incorporation and operation	[1]	Santiago, Chile
Percentage of ownership share	[1]			33.43%
Transbank S.A. [Member]
Summary of Significant Accounting Policies (Details) - Schedule of associates [Line Items]
Associates	[1]	Transbank S.A. (*)
Main activity	[1]	Debit and credit card services
Place of incorporation and operation	[1]	Santiago, Chile
Percentage of ownership share	[1]			25.00%
Centro de Compensación Automatizado [Member]
Summary of Significant Accounting Policies (Details) - Schedule of associates [Line Items]
Associates		Centro de Compensacin Automatizado
Main activity		Electronic fund transfer and compensation services
Place of incorporation and operation		Santiago, Chile
Percentage of ownership share		33.33%	33.33%	33.33%
Sociedad Interbancaria de Deposito de Valores S.A. [Member]
Summary of Significant Accounting Policies (Details) - Schedule of associates [Line Items]
Associates		Sociedad Interbancaria de Depsito de Valores S.A.
Main activity		Delivery of securities on public offer
Place of incorporation and operation		Santiago, Chile
Percentage of ownership share		29.29%	29.29%	29.29%
Camara de Compensacion de Alto Valor S.A. [Member]
Summary of Significant Accounting Policies (Details) - Schedule of associates [Line Items]
Associates		Cmara Compensacin de Alto Valor S.A.
Main activity		Payments clearing
Place of incorporation and operation		Santiago, Chile
Percentage of ownership share		15.00%	15.00%	15.00%
Administrador Financiero del Transantiago S.A. [Member]
Summary of Significant Accounting Policies (Details) - Schedule of associates [Line Items]
Associates		Administrador Financiero del Transantiago S.A.
Main activity		Administration of boarding passes to public transportation
Place of incorporation and operation		Santiago, Chile
Percentage of ownership share		20.00%	20.00%	20.00%
Sociedad Nexus S.A. [Member]
Summary of Significant Accounting Policies (Details) - Schedule of associates [Line Items]
Associates	[1]	Sociedad Nexus S.A. (*)
Main activity	[1]	Credit card processor
Place of incorporation and operation	[1]	Santiago, Chile
Percentage of ownership share	[1]			12.90%
Servicios de Infraestructura de Mercado OTC S.A. [Member]
Summary of Significant Accounting Policies (Details) - Schedule of associates [Line Items]
Associates		Servicios de Infraestructura de Mercado OTC S.A.
Main activity		Administration of the infrastructure for the financial market of derivative instruments
Place of incorporation and operation		Santiago, Chile
Percentage of ownership share		12.48%	12.48%	12.48%
[1]	The Bank is in process to sell its share participation on Redbanc S.A. and Transbank S.A. therefore it has been classified in accordance to IFRS 5 “Non-current Assets Held for Sale and Discontinued Operations” as investment available for sale. Otherwhise its share participation in Nexus S.A., has been sold. See Note N°38.

Summary of Significant Accoun_6

Summary of Significant Accounting Policies (Details) - Schedule of useful lives for the tangible assets	12 Months Ended
	Dec. 31, 2020
Land [Member]
Summary of Significant Accounting Policies (Details) - Schedule of useful lives for the tangible assets [Line Items]
Useful life
Paintings and works of art [Member]
Summary of Significant Accounting Policies (Details) - Schedule of useful lives for the tangible assets [Line Items]
Useful life
Carpets and curtains [Member]
Summary of Significant Accounting Policies (Details) - Schedule of useful lives for the tangible assets [Line Items]
Useful life	36 months
Computers and hardware[Member]
Summary of Significant Accounting Policies (Details) - Schedule of useful lives for the tangible assets [Line Items]
Useful life	36 months
Vehicles [member]
Summary of Significant Accounting Policies (Details) - Schedule of useful lives for the tangible assets [Line Items]
Useful life	36 months
IT systems and software [Member]
Summary of Significant Accounting Policies (Details) - Schedule of useful lives for the tangible assets [Line Items]
Useful life	36 months
ATMs [Member]
Summary of Significant Accounting Policies (Details) - Schedule of useful lives for the tangible assets [Line Items]
Useful life	60 months
Other machines and equipment [Member]
Summary of Significant Accounting Policies (Details) - Schedule of useful lives for the tangible assets [Line Items]
Useful life	60 months
Office furniture [Member]
Summary of Significant Accounting Policies (Details) - Schedule of useful lives for the tangible assets [Line Items]
Useful life	60 months
Telephone and communication systems [Member]
Summary of Significant Accounting Policies (Details) - Schedule of useful lives for the tangible assets [Line Items]
Useful life	60 months
Security systems [Member]
Summary of Significant Accounting Policies (Details) - Schedule of useful lives for the tangible assets [Line Items]
Useful life	60 months
Rights over telephone lines [Member]
Summary of Significant Accounting Policies (Details) - Schedule of useful lives for the tangible assets [Line Items]
Useful life	60 months
Air conditioning systems [Member]
Summary of Significant Accounting Policies (Details) - Schedule of useful lives for the tangible assets [Line Items]
Useful life	84 months
Other installations [Member]
Summary of Significant Accounting Policies (Details) - Schedule of useful lives for the tangible assets [Line Items]
Useful life	120 months
Buildings [member]
Summary of Significant Accounting Policies (Details) - Schedule of useful lives for the tangible assets [Line Items]
Useful life	1200 months

Summary of Significant Accoun_7

Summary of Significant Accounting Policies (Details) - Schedule of loan and accounts receivable charge-offs	12 Months Ended
	Dec. 31, 2020
Write-offs [Member] | Consumer Loans With Or Without Collateral [Member]
Summary of Significant Accounting Policies (Details) - Schedule of loan and accounts receivable charge-offs [Line Items]
Term	6 months
Write-offs [Member] | Other Transactions Without Collateral [Member]
Summary of Significant Accounting Policies (Details) - Schedule of loan and accounts receivable charge-offs [Line Items]
Term	24 months
Write-offs [Member] | Commercial Loans With Collateral [Member]
Summary of Significant Accounting Policies (Details) - Schedule of loan and accounts receivable charge-offs [Line Items]
Term	36 months
Write-offs [Member] | Mortgage Loans [Member]
Summary of Significant Accounting Policies (Details) - Schedule of loan and accounts receivable charge-offs [Line Items]
Term	48 months
Write-offs [Member] | Consumer Leasing [Member]
Summary of Significant Accounting Policies (Details) - Schedule of loan and accounts receivable charge-offs [Line Items]
Term	6 months
Write-offs [Member] | Other Non-Mortgage Leasing Transactions [Member]
Summary of Significant Accounting Policies (Details) - Schedule of loan and accounts receivable charge-offs [Line Items]
Term	12 months
Write-offs [Member] | Mortgage Leasing (Household And Business) [Member]
Summary of Significant Accounting Policies (Details) - Schedule of loan and accounts receivable charge-offs [Line Items]
Term	36 months
Charge-offs [Member] | Consumer Loans With Or Without Collateral [Member]
Summary of Significant Accounting Policies (Details) - Schedule of loan and accounts receivable charge-offs [Line Items]
Term	6 months
Charge-offs [Member] | Other Transactions Without Collateral [Member]
Summary of Significant Accounting Policies (Details) - Schedule of loan and accounts receivable charge-offs [Line Items]
Term	24 months
Charge-offs [Member] | Commercial Loans With Collateral [Member]
Summary of Significant Accounting Policies (Details) - Schedule of loan and accounts receivable charge-offs [Line Items]
Term	36 months
Charge-offs [Member] | Mortgage Loans [Member]
Summary of Significant Accounting Policies (Details) - Schedule of loan and accounts receivable charge-offs [Line Items]
Term	48 months
Charge-offs [Member] | Consumer Leasing [Member]
Summary of Significant Accounting Policies (Details) - Schedule of loan and accounts receivable charge-offs [Line Items]
Term	6 months
Charge-offs [Member] | Other Non-Mortgage Leasing Transactions [Member]
Summary of Significant Accounting Policies (Details) - Schedule of loan and accounts receivable charge-offs [Line Items]
Term	12 months
Charge-offs [Member] | Mortgage Leasing (Household And Business) [Member]
Summary of Significant Accounting Policies (Details) - Schedule of loan and accounts receivable charge-offs [Line Items]
Term	36 months

Significant Events (Details)

Significant Events (Details) - $ / shares	1 Months Ended			12 Months Ended
	Mar. 31, 2020	Mar. 23, 2020	Mar. 20, 2020	Dec. 31, 2020
Significant Events (Details) [Line Items]
Shareholders dividend per share				$ 0.87891310
Earning percentage				30.00%
Profits used to increase the banks reserves				40.00%
Chilean law description				In accordance with Chilean laws, the Board of Directors of Banco Santander agreed, on the session held on October 21, 2020, to call an Extraordinary Shareholders’ Meeting for November 26, 2020 in order to discuss the proposed distribution of a dividend of $0.87891310 Chilean pesos per share, corresponding to 30% of the profits for the year 2019, which are classified as retained profits in the Bank’s equity, taking into account that, the ratio between the Bank’s regulatory capital and its risk-weighted assets reached 15.13%, and the ratio between basic capital and its risk-weighted assets was 10.70% as of September 30, 2020.
Shareholder’s meeting description				At the extraordinary Shareholders’ Meeting of Banco Santander held on April 30, 2020, the members approved the Consolidated Financial Statements for 2019, and agreed to distribute 30% of the net profits for 2019 (“Net income attributable to shareholders of the Bank “), which amounted to $552,093 million, which correspond to a dividend of $0.87891310 Chilean pesos per share. Likewise, the members agreed to increase the Bank’s reserves by 40% and the remaining 30% will be classified as retained earnings from previous years. Board election: the members approved the election of Messrs. Alfonso Gómez, Claudio Melandri, Rodrigo Vergara, Félix de Vicente, Orlando Poblete, Juan Pedro Santa María, Ana Dorrego, Rodrigo Echenique and Lucía Santa Cruz, as Directors, and Blanca Bustamante and Oscar von Chrismar, as Alternate Directors, elected for a period of three years until the next renewal of the entire Board of Directors. Appointment of external auditors: the members approved PricewaterhouseCoopers Consultores Auditores SpA as external auditors for the 2020 financial year. At the Extraordinary Shareholders’ Meeting of Banco Santander held on November 26, 2020, the members agreed to distribute a dividend of $0.87891310 Chilean pesos per share, corresponding to 30% of the retained earnings for 2019, which was paid on the following banking business day after the meeting date.
Vaccination plan, description				The vaccination plan against COVID-19 began on December 24, 2020, with the first arrival of 9,750 doses of the vaccine from the Pfizer BioNtech laboratory. As of December 31, 2020, Chile had received 154,050 doses of the Pfizer BioNtech vaccine, for the vaccination plan in all regions of the country, and will receive more than 6.5 million doses of the AstraZeneca / Oxford vaccine during the first quarter of 2021 and more than 10 million of Coronavac vaccines, to continue the vaccination plan in its next stages. At the time of publication of these financial statements, 2,320,696 people have been vaccinated in Chile, which represents 13% of the population. During the first quarter of 2021, it is expected to vaccinate around 5 million people and reach 80% of the population, that is, approximately 15 million people, by the end of the first half of 2021.
Digital insurance broker percentage			100.00%
New subsidiaries, description				This is a banking support and subsidiary company of Banco Santander with a 99.99% share participation (Santander Asesorias Financieras Limitada has a 0.01% share participation).
Bank has issued senior bonds				As at December 31, 2020 the Bank has issued subordinated bonds for an amount of USD200,000,000 and UF5,000,000.
First Line of Credit [Member]
Significant Events (Details) [Line Items]
Maturity term years	4 years
Second Line of Credit [Member]
Significant Events (Details) [Line Items]
Maturity term years	2 years
Subsequent Event [Member]
Significant Events (Details) [Line Items]
Distribution and payment of dividends, percentage		60.00%
Retained earnings percentage		30.00%

Significant Events (Details) -

Significant Events (Details) - Schedule of senior bonds $ in Millions	12 Months Ended
	Dec. 31, 2020CLP ($)
USD [Member] | Senior Bonds [Member]
Significant Events (Details) - Schedule of senior bonds [Line Items]
Currency	USD
Amount	$ 750,000,000
USD [Member] | Senior Bonds [Member] | Bonos USD [Member]
Significant Events (Details) - Schedule of senior bonds [Line Items]
Currency	USD
Term (annual)	5 years
Issuance rate (annual)	2.70%
Issuance date	Jan. 7, 2020
Amount	$ 750,000,000
Maturity date	Jan. 7, 2025
USD [Member] | Subordinated Bonds [Member]
Significant Events (Details) - Schedule of senior bonds [Line Items]
Currency	USD
Amount	$ 200,000,000
USD [Member] | Subordinated Bonds [Member] | Bonos USD [Member]
Significant Events (Details) - Schedule of senior bonds [Line Items]
Currency	USD
Term (annual)	10 years
Issuance rate (annual)	3.79%
Issuance date	Jan. 21, 2020
Amount	$ 200,000,000
Maturity date	Jan. 21, 2030
UF [Member] | Subordinated Bonds [Member]
Significant Events (Details) - Schedule of senior bonds [Line Items]
Currency	UF
Amount	$ 5,000,000
UF [Member] | Subordinated Bonds [Member] | USTDW20320 [Member]
Significant Events (Details) - Schedule of senior bonds [Line Items]
Currency	UF
Term (annual)	15 years and 3 months
Issuance rate (annual)	3.50%
Issuance date	Mar. 1, 2020
Amount	$ 5,000,000
Maturity date	Sep. 1, 2035

Reporting Segments (Details)

Reporting Segments (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020CLP ($)
Retail Banking [Member]
Reporting Segments (Details) [Line Items]
Revenue	$ 2,000
Middle Market [Member]
Reporting Segments (Details) [Line Items]
Revenue	800
Middle Market [Member] | Bottom of range [member]
Reporting Segments (Details) [Line Items]
Revenue	2,000
Global Investment Banking [Member]
Reporting Segments (Details) [Line Items]
Revenue	$ 10,000

Reporting Segments (Details) -

Reporting Segments (Details) - Schedule of reporting segment $ in Millions		12 Months Ended
		Dec. 31, 2020CLP ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019CLP ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018CLP ($)	Dec. 31, 2018USD ($)
Reporting Segments (Details) - Schedule of reporting segment [Line Items]
Net interest income		$ 1,593,848		$ 1,416,964		$ 1,414,368
Other operating income		8,206		13,001		23,129
Income from investments in associates and other companies		1,388		1,146		1,324
Income tax expense		(142,533)		(175,074)		(167,144)
Result of continuing operations		552,730		619,614		595,923
Result of discontinued operations (in Dollars)					$ 1,699		$ 3,770
Net income for the year		552,730		621,313		599,693
Retail Banking [Member]
Reporting Segments (Details) - Schedule of reporting segment [Line Items]
Loans and accounts receivable at amortised cost	[1]	24,279,248		22,926,377		20,786,637
Net interest income		1,049,543		960,361		949,764
Net fee and commission income		213,431		230,627		220,532
Financial transactions, net	[2]	28,577		28,426		19,694
Expected credit losses		(317,050)		(279,969)		(287,739)
Support expenses	[3]	(596,464)		(575,511)		(553,157)
Segment’s net contribution		378,038		363,934		349,094
Middle Market [Member]
Reporting Segments (Details) - Schedule of reporting segment [Line Items]
Loans and accounts receivable at amortised cost	[1]	8,136,402		8,093,496		7,690,380
Net interest income		346,225		298,587		272,912
Net fee and commission income		38,335		38,712		36,746
Financial transactions, net	[2]	21,859		13,535		16,848
Expected credit losses		(109,999)		(38,746)		(26,314)
Support expenses	[3]	(91,132)		(97,054)		(92,377)
Segment’s net contribution		205,287		215,034		207,815
CIB [Member]
Reporting Segments (Details) - Schedule of reporting segment [Line Items]
Loans and accounts receivable at amortised cost	[1]	1,635,217		1,603,633		1,613,088
Net interest income		114,229		98,154		96,722
Net fee and commission income		23,180		29,103		35,064
Financial transactions, net	[2]	82,303		94,761		57,340
Expected credit losses		(51,097)		223		2,339
Support expenses	[3]	(72,715)		(65,343)		(64,913)
Segment’s net contribution		95,900		156,898		126,552
Other [Member]
Reporting Segments (Details) - Schedule of reporting segment [Line Items]
Loans and accounts receivable at amortised cost	[1]	289,026		48,009		123,310
Net interest income		83,851		59,862		94,970
Net fee and commission income		(7,668)		(11,356)		(1,457)
Financial transactions, net	[2]	17,058		64,970		11,200
Expected credit losses		(118)		(4,819)		(5,694)
Support expenses	[3]	(8,235)		(11,953)		(11,486)
Segment’s net contribution		84,888		96,704		87,533
Total [Member]
Reporting Segments (Details) - Schedule of reporting segment [Line Items]
Loans and accounts receivable at amortised cost	[1]	34,339,893		32,671,515		30,213,415
Net interest income		1,593,848		1,416,964		1,414,368
Net fee and commission income		267,278		287,086		290,885
Financial transactions, net	[2]	149,797		201,692		105,082
Expected credit losses		(478,264)		(323,311)		(317,408)
Support expenses	[3]	(768,546)		(749,861)		(721,933)
Segment’s net contribution		764,113		832,570		770,994
Other operating income		8,206		13,001		23,129
Other operating expenses and impairment		(78,444)		(52,029)		(32,381)
Income from investments in associates and other companies		1,388		1,146		1,325
Income tax expense		$ (142,533)		$ (175,074)		$ (167,144)
[1]	Corresponds to loans and accounts receivable at amortised cost under IFRS 9, without deducting their allowances for loan losses.
[2]	Corresponds to the sum of the net income from financial operations and the foreign exchange profit or loss.
[3]	Corresponds to the sum of personnel salaries and expenses, administrative expenses, depreciation and amortization.

Cash and Cash Equivalents (Deta

Cash and Cash Equivalents (Details) - Schedule of cash and cash equivalents - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Cash and deposits in banks
Cash	$ 665,397	$ 861,178
Deposits at the Central Bank of Chile	1,313,394	1,731,079
Deposits in local banks	1,571	948
Deposits in banks abroad	822,926	961,315
Subtotals – Cash and deposits in banks	2,803,288	3,554,520
Net cash items in process of collection	91,332	156,814
Cash and cash equivalents	$ 2,894,620	$ 3,711,334

Cash and Cash Equivalents (De_2

Cash and Cash Equivalents (Details) - Schedule of cash in process of collection and in process - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Assets
Documents held by other banks (documents to be cleared)	$ 137,396	$ 217,394
Funds receivable	315,567	137,668
Subtotal	452,963	355,062
Liabilities
Funds payable	361,631	198,248
Subtotal	361,631	198,248
Cash in process of collection, net	$ 91,332	$ 156,814

Financial Assets Held for Tra_3

Financial Assets Held for Trading (Details) - Schedule of instruments deemed as financial trading investments - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Chilean Central Bank and Government securities
Total	$ 133,718	$ 270,204
Chilean Central Bank and Government securities [Member]
Chilean Central Bank and Government securities
Total	132,246	270,204
Chilean Central Bank and Government securities [Member] | Chilean Central Bank Bonds [Member]
Chilean Central Bank and Government securities
Total	419	1,952
Chilean Central Bank and Government securities [Member] | Chilean Central Bank Notes [Member]
Chilean Central Bank and Government securities
Total
Chilean Central Bank and Government securities [Member] | Other Chilean Central Bank and Government securities [Member]
Chilean Central Bank and Government securities
Total	131,827	268,252
Other Chilean securities [Member]
Chilean Central Bank and Government securities
Total	1,472
Other Chilean securities [Member] | Time deposits in Chilean financial institutions [Member]
Chilean Central Bank and Government securities
Total
Other Chilean securities [Member] | Mortgage finance bonds of Chilean financial institutions [Member]
Chilean Central Bank and Government securities
Total
Other Chilean securities [Member] | Chilean financial institution bondsv
Chilean Central Bank and Government securities
Total
Other Chilean securities [Member] | Chilean corporate bonds [Member]
Chilean Central Bank and Government securities
Total	1,472
Other Chilean securities [Member] | Other Chilean securities [Member]
Chilean Central Bank and Government securities
Total
Foreign financial securities [Member]
Chilean Central Bank and Government securities
Total
Foreign financial securities [Member] | Foreign Central Banks and Government securities [Member]
Chilean Central Bank and Government securities
Total
Foreign financial securities [Member] | Other foreign financial instruments [Member]
Chilean Central Bank and Government securities
Total
Investments in mutual funds [Member]
Chilean Central Bank and Government securities
Total
Investments in mutual funds [Member] | Funds managed by related entities [Member]
Chilean Central Bank and Government securities
Total
Investments in mutual funds [Member] | Funds managed by others [Member]
Chilean Central Bank and Government securities
Total

Investments under Resale Agre_3

Investments under Resale Agreements and Obligations under Repurchase Agreements (Details) - Schedule of selling financial instruments - CLP ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Securities from Chilean Government and the Chilean Central Bank:
Total	$ 969,808,000	$ 380,055,000
Instruments from other domestic institutions [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total	399,000	131,000
Instruments from other foreign institutions [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total
Time deposits in Chilean financial institutions [Member] | Instruments from other domestic institutions [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total	399,000	131,000
Securities from Government or foreign Central Banks [Member] | Instruments from other foreign institutions [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total
Due Within 1 Year [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total	969,808,000	380,018,000
Due Within 1 Year [Member] | Instruments from other domestic institutions [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total	399,000	127,000
Due Within 1 Year [Member] | Instruments from other foreign institutions [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total
Due Within 1 Year [Member] | Time deposits in Chilean financial institutions [Member] | Instruments from other domestic institutions [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total	399,000	127,000
Due Within 1 Year [Member] | Securities from Government or foreign Central Banks [Member] | Instruments from other foreign institutions [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total
More Than 3 Months To 1 Year [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total		37,000
More Than 3 Months To 1 Year [Member] | Instruments from other domestic institutions [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total		4,000
More Than 3 Months To 1 Year [Member] | Instruments from other foreign institutions [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total
More Than 3 Months To 1 Year [Member] | Time deposits in Chilean financial institutions [Member] | Instruments from other domestic institutions [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total		4,000
More Than 3 Months To 1 Year [Member] | Securities from Government or foreign Central Banks [Member] | Instruments from other foreign institutions [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total
Later than one year [member]
Securities from Chilean Government and the Chilean Central Bank:
Total
Later than one year [member] | Instruments from other domestic institutions [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total
Later than one year [member] | Instruments from other foreign institutions [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total
Later than one year [member] | Time deposits in Chilean financial institutions [Member] | Instruments from other domestic institutions [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total
Later than one year [member] | Securities from Government or foreign Central Banks [Member] | Instruments from other foreign institutions [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total
Securities from Chilean Government and the Chilean Central Bank [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total	969,409	379,924,000
Securities from Chilean Government and the Chilean Central Bank [Member] | Chilean Central Bank Bonds [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total
Securities from Chilean Government and the Chilean Central Bank [Member] | Chilean Central Bank Notes [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total	461,961
Securities from Chilean Government and the Chilean Central Bank [Member] | Other securities from the Government and the Chilean Central Bank [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total	507,448	379,924,000
Securities from Chilean Government and the Chilean Central Bank [Member] | Due Within 1 Year [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total	969,409	379,891,000
Securities from Chilean Government and the Chilean Central Bank [Member] | Due Within 1 Year [Member] | Chilean Central Bank Bonds [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total
Securities from Chilean Government and the Chilean Central Bank [Member] | Due Within 1 Year [Member] | Chilean Central Bank Notes [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total	461,961
Securities from Chilean Government and the Chilean Central Bank [Member] | Due Within 1 Year [Member] | Other securities from the Government and the Chilean Central Bank [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total	507,448	379,891,000
Securities from Chilean Government and the Chilean Central Bank [Member] | More Than 3 Months To 1 Year [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total		33,000
Securities from Chilean Government and the Chilean Central Bank [Member] | More Than 3 Months To 1 Year [Member] | Chilean Central Bank Bonds [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total
Securities from Chilean Government and the Chilean Central Bank [Member] | More Than 3 Months To 1 Year [Member] | Chilean Central Bank Notes [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total
Securities from Chilean Government and the Chilean Central Bank [Member] | More Than 3 Months To 1 Year [Member] | Other securities from the Government and the Chilean Central Bank [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total		33,000
Securities from Chilean Government and the Chilean Central Bank [Member] | Later than one year [member]
Securities from Chilean Government and the Chilean Central Bank:
Total
Securities from Chilean Government and the Chilean Central Bank [Member] | Later than one year [member] | Chilean Central Bank Bonds [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total
Securities from Chilean Government and the Chilean Central Bank [Member] | Later than one year [member] | Chilean Central Bank Notes [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total
Securities from Chilean Government and the Chilean Central Bank [Member] | Later than one year [member] | Other securities from the Government and the Chilean Central Bank [Member]
Securities from Chilean Government and the Chilean Central Bank:
Total

Investments under Resale Agre_4

Investments under Resale Agreements and Obligations under Repurchase Agreements (Details) - Schedule of portfolio of collateral associated with repurchase agreements at fair value - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Chilean Central Bank and Government securities:
Total	$ 969,907	$ 380,055
Other Chilean Securities [Member]
Chilean Central Bank and Government securities:
Total	399	131
Instruments from other foreign institutions [Member]
Chilean Central Bank and Government securities:
Total
Time Deposits In Chilean Financial Institutions [Member] | Other Chilean Securities [Member]
Chilean Central Bank and Government securities:
Total	399	131
Securities from Government or foreign Central Banks [Member] | Instruments from other foreign institutions [Member]
Chilean Central Bank and Government securities:
Total
Available For Sale Portfolio [Member]
Chilean Central Bank and Government securities:
Total	969,907	380,055
Available For Sale Portfolio [Member] | Other Chilean Securities [Member]
Chilean Central Bank and Government securities:
Total	399	131
Available For Sale Portfolio [Member] | Instruments from other foreign institutions [Member]
Chilean Central Bank and Government securities:
Total
Available For Sale Portfolio [Member] | Time Deposits In Chilean Financial Institutions [Member] | Other Chilean Securities [Member]
Chilean Central Bank and Government securities:
Total	399	131
Available For Sale Portfolio [Member] | Securities from Government or foreign Central Banks [Member] | Instruments from other foreign institutions [Member]
Chilean Central Bank and Government securities:
Total
Trading Portfolio [Member]
Chilean Central Bank and Government securities:
Total
Trading Portfolio [Member] | Other Chilean Securities [Member]
Chilean Central Bank and Government securities:
Total
Trading Portfolio [Member] | Instruments from other foreign institutions [Member]
Chilean Central Bank and Government securities:
Total
Trading Portfolio [Member] | Time Deposits In Chilean Financial Institutions [Member] | Other Chilean Securities [Member]
Chilean Central Bank and Government securities:
Total
Trading Portfolio [Member] | Securities from Government or foreign Central Banks [Member] | Instruments from other foreign institutions [Member]
Chilean Central Bank and Government securities:
Total
Chilean Central Bank And Government Securities [Member]
Chilean Central Bank and Government securities:
Total	969,508	379,924
Chilean Central Bank And Government Securities [Member] | Chilean Central Bank Bonds [Member]
Chilean Central Bank and Government securities:
Total
Chilean Central Bank And Government Securities [Member] | Chilean Central Bank Notes [Member]
Chilean Central Bank and Government securities:
Total	461,965
Chilean Central Bank And Government Securities [Member] | Other securities from the Government and the Chilean Central Bank [Member]
Chilean Central Bank and Government securities:
Total	507,543	379,924
Chilean Central Bank And Government Securities [Member] | Available For Sale Portfolio [Member]
Chilean Central Bank and Government securities:
Total	969,508	379,924
Chilean Central Bank And Government Securities [Member] | Available For Sale Portfolio [Member] | Chilean Central Bank Bonds [Member]
Chilean Central Bank and Government securities:
Total
Chilean Central Bank And Government Securities [Member] | Available For Sale Portfolio [Member] | Chilean Central Bank Notes [Member]
Chilean Central Bank and Government securities:
Total	461,965
Chilean Central Bank And Government Securities [Member] | Available For Sale Portfolio [Member] | Other securities from the Government and the Chilean Central Bank [Member]
Chilean Central Bank and Government securities:
Total	507,543	379,924
Chilean Central Bank And Government Securities [Member] | Trading Portfolio [Member]
Chilean Central Bank and Government securities:
Total
Chilean Central Bank And Government Securities [Member] | Trading Portfolio [Member] | Chilean Central Bank Bonds [Member]
Chilean Central Bank and Government securities:
Total
Chilean Central Bank And Government Securities [Member] | Trading Portfolio [Member] | Chilean Central Bank Notes [Member]
Chilean Central Bank and Government securities:
Total
Chilean Central Bank And Government Securities [Member] | Trading Portfolio [Member] | Other securities from the Government and the Chilean Central Bank [Member]
Chilean Central Bank and Government securities:
Total

Derivative Financial Instrume_3

Derivative Financial Instruments and Hedge Accounting (Details) - CLP ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of derivative financial instruments [text block] [Abstract]
Percentage of hedges	100.00%
Net assets or liabilities	$ 327,938	$ 210,867

Derivative Financial Instrume_4

Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of portfolio of derivative instruments - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Fair value hedge derivatives
Notional amount	$ 363,668,609	$ 377,131,597
Fair value Assets	9,032,085	8,148,608
Fair value Liabilities	9,018,660	7,390,654
Due Within 1 Year [Member]
Fair value hedge derivatives
Notional amount	46,609,923	56,066,835
More Than 3 Months To 1 Year [Member]
Fair value hedge derivatives
Notional amount	51,494,013	84,086,430
More Than 1 Year [Member]
Fair value hedge derivatives
Notional amount	265,564,673	236,978,332
Fair value hedge derivatives [Member]
Fair value hedge derivatives
Notional amount	12,078,887	17,174,436
Fair value Assets	328,378	266,330
Fair value Liabilities	262,195	329,545
Fair value hedge derivatives [Member] | Due Within 1 Year [Member]
Fair value hedge derivatives
Notional amount	367,400	788,646
Fair value hedge derivatives [Member] | More Than 3 Months To 1 Year [Member]
Fair value hedge derivatives
Notional amount	1,012,674	1,181,594
Fair value hedge derivatives [Member] | More Than 1 Year [Member]
Fair value hedge derivatives
Notional amount	10,698,813	15,204,196
Fair value hedge derivatives [Member] | Interest rate swaps [Member]
Fair value hedge derivatives
Notional amount	5,524,800	2,546,386
Fair value Assets	33,816	39,460
Fair value Liabilities	83,666	34,264
Fair value hedge derivatives [Member] | Interest rate swaps [Member] | Due Within 1 Year [Member]
Fair value hedge derivatives
Notional amount	50,000	381,638
Fair value hedge derivatives [Member] | Interest rate swaps [Member] | More Than 3 Months To 1 Year [Member]
Fair value hedge derivatives
Notional amount	410,687	317,610
Fair value hedge derivatives [Member] | Interest rate swaps [Member] | More Than 1 Year [Member]
Fair value hedge derivatives
Notional amount	5,064,113	1,847,138
Fair value hedge derivatives [Member] | Cross currency swaps [Member]
Fair value hedge derivatives
Notional amount	6,554,087	14,628,050
Fair value Assets	294,562	226,870
Fair value Liabilities	178,529	295,281
Fair value hedge derivatives [Member] | Cross currency swaps [Member] | Due Within 1 Year [Member]
Fair value hedge derivatives
Notional amount	317,400	407,008
Fair value hedge derivatives [Member] | Cross currency swaps [Member] | More Than 3 Months To 1 Year [Member]
Fair value hedge derivatives
Notional amount	601,987	863,984
Fair value hedge derivatives [Member] | Cross currency swaps [Member] | More Than 1 Year [Member]
Fair value hedge derivatives
Notional amount	5,634,700	13,357,058
Cash flow hedge derivatives [Member]
Fair value hedge derivatives
Notional amount	13,926,410	16,939,379
Fair value Assets	38,887	110,544
Fair value Liabilities	186,942	46,688
Cash flow hedge derivatives [Member] | Due Within 1 Year [Member]
Fair value hedge derivatives
Notional amount	2,545,684	2,366,012
Cash flow hedge derivatives [Member] | More Than 3 Months To 1 Year [Member]
Fair value hedge derivatives
Notional amount	1,001,653	2,956,878
Cash flow hedge derivatives [Member] | More Than 1 Year [Member]
Fair value hedge derivatives
Notional amount	10,379,073	11,616,489
Cash flow hedge derivatives [Member] | Cross currency swaps [Member]
Fair value hedge derivatives
Notional amount	10,700,222	15,053,362
Fair value Assets	35,902	106,413
Fair value Liabilities	183,386	43,183
Cash flow hedge derivatives [Member] | Cross currency swaps [Member] | Due Within 1 Year [Member]
Fair value hedge derivatives
Notional amount	424,358	2,266,907
Cash flow hedge derivatives [Member] | Cross currency swaps [Member] | More Than 3 Months To 1 Year [Member]
Fair value hedge derivatives
Notional amount	498,373	1,938,222
Cash flow hedge derivatives [Member] | Cross currency swaps [Member] | More Than 1 Year [Member]
Fair value hedge derivatives
Notional amount	9,777,491	10,848,233
Cash flow hedge derivatives [Member] | Currency forwards [Member]
Fair value hedge derivatives
Notional amount	3,226,188	1,886,017
Fair value Assets	2,985	4,131
Fair value Liabilities	3,556	3,505
Cash flow hedge derivatives [Member] | Currency forwards [Member] | Due Within 1 Year [Member]
Fair value hedge derivatives
Notional amount	2,121,326	99,105
Cash flow hedge derivatives [Member] | Currency forwards [Member] | More Than 3 Months To 1 Year [Member]
Fair value hedge derivatives
Notional amount	503,280	1,018,656
Cash flow hedge derivatives [Member] | Currency forwards [Member] | More Than 1 Year [Member]
Fair value hedge derivatives
Notional amount	601,582	768,256
Trading derivatives [Member]
Fair value hedge derivatives
Notional amount	337,663,312	343,017,782
Fair value Assets	8,664,820	7,771,734
Fair value Liabilities	8,569,523	7,014,421
Trading derivatives [Member] | Due Within 1 Year [Member]
Fair value hedge derivatives
Notional amount	43,696,839	52,912,177
Trading derivatives [Member] | More Than 3 Months To 1 Year [Member]
Fair value hedge derivatives
Notional amount	49,479,686	79,947,958
Trading derivatives [Member] | More Than 1 Year [Member]
Fair value hedge derivatives
Notional amount	244,486,787	210,157,647
Trading derivatives [Member] | Interest rate swaps [Member]
Fair value hedge derivatives
Notional amount	133,928,254	146,680,442
Fair value Assets	3,651,651	2,465,235
Fair value Liabilities	3,588,912	2,270,686
Trading derivatives [Member] | Interest rate swaps [Member] | Due Within 1 Year [Member]
Fair value hedge derivatives
Notional amount	14,006,503	16,678,487
Trading derivatives [Member] | Interest rate swaps [Member] | More Than 3 Months To 1 Year [Member]
Fair value hedge derivatives
Notional amount	22,118,742	40,892,909
Trading derivatives [Member] | Interest rate swaps [Member] | More Than 1 Year [Member]
Fair value hedge derivatives
Notional amount	97,803,009	89,109,046
Trading derivatives [Member] | Cross currency swaps [Member]
Fair value hedge derivatives
Notional amount	160,209,466	141,390,865
Fair value Assets	3,921,440	4,277,450
Fair value Liabilities	3,819,446	3,605,516
Trading derivatives [Member] | Cross currency swaps [Member] | Due Within 1 Year [Member]
Fair value hedge derivatives
Notional amount	6,719,065	7,726,724
Trading derivatives [Member] | Cross currency swaps [Member] | More Than 3 Months To 1 Year [Member]
Fair value hedge derivatives
Notional amount	15,138,056	20,457,463
Trading derivatives [Member] | Cross currency swaps [Member] | More Than 1 Year [Member]
Fair value hedge derivatives
Notional amount	138,352,345	113,206,678
Trading derivatives [Member] | Currency forwards [Member]
Fair value hedge derivatives
Notional amount	43,120,437	54,660,752
Fair value Assets	1,085,327	1,023,683
Fair value Liabilities	1,158,904	1,137,496
Trading derivatives [Member] | Currency forwards [Member] | Due Within 1 Year [Member]
Fair value hedge derivatives
Notional amount	22,729,787	28,472,586
Trading derivatives [Member] | Currency forwards [Member] | More Than 3 Months To 1 Year [Member]
Fair value hedge derivatives
Notional amount	12,175,074	18,508,702
Trading derivatives [Member] | Currency forwards [Member] | More Than 1 Year [Member]
Fair value hedge derivatives
Notional amount	8,215,576	7,679,464
Trading derivatives [Member] | Call currency options [Member]
Fair value hedge derivatives
Notional amount	218,561	146,787
Fair value Assets	1,527	5,176
Fair value Liabilities	909	240
Trading derivatives [Member] | Call currency options [Member] | Due Within 1 Year [Member]
Fair value hedge derivatives
Notional amount	129,339	17,971
Trading derivatives [Member] | Call currency options [Member] | More Than 3 Months To 1 Year [Member]
Fair value hedge derivatives
Notional amount	31,641	47,012
Trading derivatives [Member] | Call currency options [Member] | More Than 1 Year [Member]
Fair value hedge derivatives
Notional amount	57,581	81,804
Trading derivatives [Member] | Put currency options [Member]
Fair value hedge derivatives
Notional amount	186,594	138,936
Fair value Assets	4,875	190
Fair value Liabilities	1,352	483
Trading derivatives [Member] | Put currency options [Member] | Due Within 1 Year [Member]
Fair value hedge derivatives
Notional amount	112,145	16,409
Trading derivatives [Member] | Put currency options [Member] | More Than 3 Months To 1 Year [Member]
Fair value hedge derivatives
Notional amount	16,173	41,872
Trading derivatives [Member] | Put currency options [Member] | More Than 1 Year [Member]
Fair value hedge derivatives
Notional amount	$ 58,276	$ 80,655

Derivative Financial Instrume_5

Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of fair value hedges - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt instruments at FVOCI
Total	$ 9,183,930	$ 9,689,985
Issued debt instruments [Member]
Debt instruments at FVOCI
Total		9,689,985
Interbank borrowing [Member]
Debt instruments at FVOCI
Total	9,183,930
Within 1 year [Member]
Debt instruments at FVOCI
Total	156,948	1,336,940
Within 1 year [Member] | Issued debt instruments [Member]
Debt instruments at FVOCI
Total		1,336,940
Within 1 year [Member] | Interbank borrowing [Member]
Debt instruments at FVOCI
Total	156,948
Between 1 and 3 years [Member]
Debt instruments at FVOCI
Total	871,171	1,962,401
Between 1 and 3 years [Member] | Issued debt instruments [Member]
Debt instruments at FVOCI
Total		1,962,401
Between 1 and 3 years [Member] | Interbank borrowing [Member]
Debt instruments at FVOCI
Total	871,171
Between 3 and 6 years [Member]
Debt instruments at FVOCI
Total	6,543,356	2,634,486
Between 3 and 6 years [Member] | Issued debt instruments [Member]
Debt instruments at FVOCI
Total		2,634,486
Between 3 and 6 years [Member] | Interbank borrowing [Member]
Debt instruments at FVOCI
Total	6,543,356
Over 6 years [Member]
Debt instruments at FVOCI
Total	1,612,455	3,756,158
Over 6 years [Member] | Issued debt instruments [Member]
Debt instruments at FVOCI
Total		3,756,158
Over 6 years [Member] | Interbank borrowing [Member]
Debt instruments at FVOCI
Total	1,612,455
Chilean sovereign bonds [Member] | Debt instruments at FVOCI [Member]
Debt instruments at FVOCI
Total	408,858	400,295
Chilean sovereign bonds [Member] | Within 1 year [Member] | Debt instruments at FVOCI [Member]
Debt instruments at FVOCI
Total	10,687
Chilean sovereign bonds [Member] | Between 1 and 3 years [Member] | Debt instruments at FVOCI [Member]
Debt instruments at FVOCI
Total	10,687
Chilean sovereign bonds [Member] | Between 3 and 6 years [Member] | Debt instruments at FVOCI [Member]
Debt instruments at FVOCI
Total	138,044	5,605
Chilean sovereign bonds [Member] | Over 6 years [Member] | Debt instruments at FVOCI [Member]
Debt instruments at FVOCI
Total	249,440	394,690
Mortgage financing bonds [Member] | Debt instruments at FVOCI [Member]
Debt instruments at FVOCI
Total	918	2,728
Mortgage financing bonds [Member] | Between 1 and 3 years [Member] | Debt instruments at FVOCI [Member]
Debt instruments at FVOCI
Total	918	2,728
US Treasury bonds [Member] | Debt instruments at FVOCI [Member]
Debt instruments at FVOCI
Total	178,118	186,843
US Treasury bonds [Member] | Between 3 and 6 years [Member] | Debt instruments at FVOCI [Member]
Debt instruments at FVOCI
Total	178,118	149,474
US Treasury bonds [Member] | Over 6 years [Member] | Debt instruments at FVOCI [Member]
Debt instruments at FVOCI
Total		37,369
Time deposits [Member] | Time deposits and other time liabilities [Member]
Debt instruments at FVOCI
Total	116,455	1,192,695
Time deposits [Member] | Within 1 year [Member] | Time deposits and other time liabilities [Member]
Debt instruments at FVOCI
Total	58,238	685,259
Time deposits [Member] | Between 1 and 3 years [Member] | Time deposits and other time liabilities [Member]
Debt instruments at FVOCI
Total	58,217	281,921
Time deposits [Member] | Between 3 and 6 years [Member] | Time deposits and other time liabilities [Member]
Debt instruments at FVOCI
Total		225,515
Senior bonds [Member] | Issued debt instruments [Member]
Debt instruments at FVOCI
Total	4,222,724	7,363,371
Senior bonds [Member] | Within 1 year [Member] | Issued debt instruments [Member]
Debt instruments at FVOCI
Total	88,023	651,681
Senior bonds [Member] | Between 1 and 3 years [Member] | Issued debt instruments [Member]
Debt instruments at FVOCI
Total	801,349	1,133,698
Senior bonds [Member] | Between 3 and 6 years [Member] | Issued debt instruments [Member]
Debt instruments at FVOCI
Total	2,112,831	2,253,892
Senior bonds [Member] | Over 6 years [Member] | Issued debt instruments [Member]
Debt instruments at FVOCI
Total	1,220,521	3,324,100
Subordinated bonds [Member] | Issued debt instruments [Member]
Debt instruments at FVOCI
Total	391,857
Subordinated bonds [Member] | Between 3 and 6 years [Member] | Issued debt instruments [Member]
Debt instruments at FVOCI
Total	249,363
Subordinated bonds [Member] | Over 6 years [Member] | Issued debt instruments [Member]
Debt instruments at FVOCI
Total	142,494
hilean Central Bank loans [Member] | Interbank borrowing [Member]
Debt instruments at FVOCI
Total	3,865,000
hilean Central Bank loans [Member] | Between 3 and 6 years [Member] | Interbank borrowing [Member]
Debt instruments at FVOCI
Total	3,865,000
Cross currency swaps [Member] | Hedging instrument [Member]
Debt instruments at FVOCI
Total	4,209,130	7,793,599
Cross currency swaps [Member] | Within 1 year [Member] | Hedging instrument [Member]
Debt instruments at FVOCI
Total	96,261	637,692
Cross currency swaps [Member] | Between 1 and 3 years [Member] | Hedging instrument [Member]
Debt instruments at FVOCI
Total	835,484	1,602,401
Cross currency swaps [Member] | Between 3 and 6 years [Member] | Hedging instrument [Member]
Debt instruments at FVOCI
Total	2,056,864	2,229,407
Cross currency swaps [Member] | Over 6 years [Member] | Hedging instrument [Member]
Debt instruments at FVOCI
Total	1,220,521	3,324,099
Interest rate swaps [Member] | Hedging instrument [Member]
Debt instruments at FVOCI
Total	4,974,800	1,896,386
Interest rate swaps [Member] | Within 1 year [Member] | Hedging instrument [Member]
Debt instruments at FVOCI
Total	60,687	699,248
Interest rate swaps [Member] | Between 1 and 3 years [Member] | Hedging instrument [Member]
Debt instruments at FVOCI
Total	35,687	360,000
Interest rate swaps [Member] | Between 3 and 6 years [Member] | Hedging instrument [Member]
Debt instruments at FVOCI
Total	4,486,492	405,079
Interest rate swaps [Member] | Over 6 years [Member] | Hedging instrument [Member]
Debt instruments at FVOCI
Total	$ 391,934	432,059
Chilean Treasury bonds [Member] | Debt instruments at FVOCI [Member]
Debt instruments at FVOCI
Total		289,369
Chilean Treasury bonds [Member] | Between 1 and 3 years [Member] | Debt instruments at FVOCI [Member]
Debt instruments at FVOCI
Total		289,369
Chilean Central Bank bonds [Member] | Debt instruments at FVOCI [Member]
Debt instruments at FVOCI
Total		254,685
Chilean Central Bank bonds [Member] | Between 1 and 3 years [Member] | Debt instruments at FVOCI [Member]
Debt instruments at FVOCI
Total		$ 254,685

Derivative Financial Instrume_6

Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of notional amount of the hedged - cash flow Hedges [Member] - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Loans and accounts receivable at amortized cost
Notional amount	$ 13,926,410	$ 16,939,379
Cross currency swaps [Member]
Loans and accounts receivable at amortized cost
Notional amount	10,700,222	15,053,362
Currency forwards [Member]
Loans and accounts receivable at amortized cost
Notional amount	3,226,188	1,886,017
Due Within 1 Year [Member] | Cross currency swaps [Member]
Loans and accounts receivable at amortized cost
Notional amount		4,205,129
Between 1 and 3 years [Member] | Cross currency swaps [Member]
Loans and accounts receivable at amortized cost
Notional amount		2,918,149
Between 3 and 6 years [Member] | Cross currency swaps [Member]
Loans and accounts receivable at amortized cost
Notional amount		3,497,630
Over 6 years [Member] | Cross currency swaps [Member]
Loans and accounts receivable at amortized cost
Notional amount		4,432,454
Hedged item [Member]
Loans and accounts receivable at amortized cost
Notional amount	13,926,410
Hedged item [Member] | Due Within 1 Year [Member]
Loans and accounts receivable at amortized cost
Notional amount	3,547,337
Hedged item [Member] | Between 1 and 3 years [Member]
Loans and accounts receivable at amortized cost
Notional amount	3,342,835
Hedged item [Member] | Between 3 and 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount	4,339,765
Hedged item [Member] | Over 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount	2,696,473
Currency forwards [Member]
Loans and accounts receivable at amortized cost
Notional amount		1,886,017
Currency forwards [Member] | Due Within 1 Year [Member]
Loans and accounts receivable at amortized cost
Notional amount		1,117,761
Currency forwards [Member] | Between 1 and 3 years [Member]
Loans and accounts receivable at amortized cost
Notional amount		768,256
Currency forwards [Member] | Between 3 and 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount
Currency forwards [Member] | Over 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount
Mortgage loans [Member] | Loans and accounts receivable at amortised cost [Member]
Loans and accounts receivable at amortized cost
Notional amount	9,293,791	9,972,447
Mortgage loans [Member] | Loans and accounts receivable at amortised cost [Member] | Due Within 1 Year [Member]
Loans and accounts receivable at amortized cost
Notional amount	1,926,918	3,334,734
Mortgage loans [Member] | Loans and accounts receivable at amortised cost [Member] | Between 1 and 3 years [Member]
Loans and accounts receivable at amortized cost
Notional amount	2,520,951	1,505,595
Mortgage loans [Member] | Loans and accounts receivable at amortised cost [Member] | Between 3 and 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount	2,761,742	1,995,156
Mortgage loans [Member] | Loans and accounts receivable at amortised cost [Member] | Over 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount	2,084,180	3,136,962
Chilean sovereign bonds [Member] | Debt instruments at FVOCI [Member]
Loans and accounts receivable at amortized cost
Notional amount	42,532
Chilean sovereign bonds [Member] | Debt instruments at FVOCI [Member] | Due Within 1 Year [Member]
Loans and accounts receivable at amortized cost
Notional amount
Chilean sovereign bonds [Member] | Debt instruments at FVOCI [Member] | Between 1 and 3 years [Member]
Loans and accounts receivable at amortized cost
Notional amount
Chilean sovereign bonds [Member] | Debt instruments at FVOCI [Member] | Between 3 and 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount	42,532
Chilean sovereign bonds [Member] | Debt instruments at FVOCI [Member] | Over 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount
Chilean Central Bank bonds [Member] | Debt instruments at FVOCI [Member]
Loans and accounts receivable at amortized cost
Notional amount	1,264,094
Chilean Central Bank bonds [Member] | Debt instruments at FVOCI [Member] | Between 1 and 3 years [Member]
Loans and accounts receivable at amortized cost
Notional amount	175,875
Chilean Central Bank bonds [Member] | Debt instruments at FVOCI [Member] | Between 3 and 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount	891,791
Chilean Central Bank bonds [Member] | Debt instruments at FVOCI [Member] | Over 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount	196,428
Senior bonds (variable rate) [Member] | Issued debt instruments [Member]
Loans and accounts receivable at amortized cost
Notional amount	167,430	699,401
Senior bonds (variable rate) [Member] | Issued debt instruments [Member] | Due Within 1 Year [Member]
Loans and accounts receivable at amortized cost
Notional amount	167,430	358,118
Senior bonds (variable rate) [Member] | Issued debt instruments [Member] | Between 1 and 3 years [Member]
Loans and accounts receivable at amortized cost
Notional amount		341,283
Senior bonds (variable rate) [Member] | Issued debt instruments [Member] | Between 3 and 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount
Senior bonds (variable rate) [Member] | Issued debt instruments [Member] | Over 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount
Senior bonds (fixed rate) [Member] | Issued debt instruments [Member]
Loans and accounts receivable at amortized cost
Notional amount	2,795,203	4,722,163
Senior bonds (fixed rate) [Member] | Issued debt instruments [Member] | Due Within 1 Year [Member]
Loans and accounts receivable at amortized cost
Notional amount	1,125,253	803,596
Senior bonds (fixed rate) [Member] | Issued debt instruments [Member] | Between 1 and 3 years [Member]
Loans and accounts receivable at amortized cost
Notional amount	610,385	1,696,595
Senior bonds (fixed rate) [Member] | Issued debt instruments [Member] | Between 3 and 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount	643,700	1,152,461
Senior bonds (fixed rate) [Member] | Issued debt instruments [Member] | Over 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount	415,865	1,069,511
Interbank loans [Member] | Interbank borrowings [Member]
Loans and accounts receivable at amortized cost
Notional amount	363,360	969,374
Interbank loans [Member] | Interbank borrowings [Member] | Due Within 1 Year [Member]
Loans and accounts receivable at amortized cost
Notional amount	327,736	826,442
Interbank loans [Member] | Interbank borrowings [Member] | Between 1 and 3 years [Member]
Loans and accounts receivable at amortized cost
Notional amount	35,624	142,932
Interbank loans [Member] | Interbank borrowings [Member] | Between 3 and 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount
Interbank loans [Member] | Interbank borrowings [Member] | Over 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount
Commercial loans [Member] | Loans and accounts receivable at amortised cost [Member] | Between 1 and 3 years [Member]
Loans and accounts receivable at amortized cost
Notional amount
Commercial loans [Member] | Loans and accounts receivable at amortised cost [Member] | Between 3 and 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount
Commercial loans [Member] | Loans and accounts receivable at amortised cost [Member] | Over 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount
Chilean Central Bank bonds [Member] | Debt instruments at FVOCI [Member]
Loans and accounts receivable at amortized cost
Notional amount		82,727
Chilean Central Bank bonds [Member] | Debt instruments at FVOCI [Member] | Due Within 1 Year [Member]
Loans and accounts receivable at amortized cost
Notional amount
Chilean Central Bank bonds [Member] | Debt instruments at FVOCI [Member] | Between 1 and 3 years [Member]
Loans and accounts receivable at amortized cost
Notional amount
Chilean Central Bank bonds [Member] | Debt instruments at FVOCI [Member] | Between 3 and 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount		82,727
Chilean Central Bank bonds [Member] | Debt instruments at FVOCI [Member] | Over 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount
Time deposits [Member] | Debt instruments at FVOCI [Member]
Loans and accounts receivable at amortized cost
Notional amount		493,267
Time deposits [Member] | Debt instruments at FVOCI [Member] | Due Within 1 Year [Member]
Loans and accounts receivable at amortized cost
Notional amount
Time deposits [Member] | Debt instruments at FVOCI [Member] | Between 1 and 3 years [Member]
Loans and accounts receivable at amortized cost
Notional amount
Time deposits [Member] | Debt instruments at FVOCI [Member] | Between 3 and 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount		267,286
Time deposits [Member] | Debt instruments at FVOCI [Member] | Over 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount		225,981
Time deposits [Member] | Time deposits and other time liabilities [Member]
Loans and accounts receivable at amortized cost
Notional amount
Time deposits [Member] | Time deposits and other time liabilities [Member] | Due Within 1 Year [Member]
Loans and accounts receivable at amortized cost
Notional amount
Time deposits [Member] | Time deposits and other time liabilities [Member] | Between 1 and 3 years [Member]
Loans and accounts receivable at amortized cost
Notional amount
Time deposits [Member] | Time deposits and other time liabilities [Member] | Between 3 and 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount
Time deposits [Member] | Time deposits and other time liabilities [Member] | Over 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount
Hedging instrument [Member]
Loans and accounts receivable at amortized cost
Notional amount	13,926,410	16,939,379
Hedging instrument [Member] | Cross currency swaps [Member]
Loans and accounts receivable at amortized cost
Notional amount	10,700,222
Hedging instrument [Member] | Currency forwards [Member]
Loans and accounts receivable at amortized cost
Notional amount	3,226,188
Hedging instrument [Member] | Due Within 1 Year [Member]
Loans and accounts receivable at amortized cost
Notional amount	3,547,337	5,322,890
Hedging instrument [Member] | Due Within 1 Year [Member] | Cross currency swaps [Member]
Loans and accounts receivable at amortized cost
Notional amount	922,731
Hedging instrument [Member] | Due Within 1 Year [Member] | Currency forwards [Member]
Loans and accounts receivable at amortized cost
Notional amount	2,624,606
Hedging instrument [Member] | Between 1 and 3 years [Member]
Loans and accounts receivable at amortized cost
Notional amount	3,342,835	3,686,405
Hedging instrument [Member] | Between 1 and 3 years [Member] | Cross currency swaps [Member]
Loans and accounts receivable at amortized cost
Notional amount	2,741,253
Hedging instrument [Member] | Between 1 and 3 years [Member] | Currency forwards [Member]
Loans and accounts receivable at amortized cost
Notional amount	601,582
Hedging instrument [Member] | Between 3 and 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount	4,339,765	3,497,630
Hedging instrument [Member] | Between 3 and 6 years [Member] | Cross currency swaps [Member]
Loans and accounts receivable at amortized cost
Notional amount	4,339,765
Hedging instrument [Member] | Between 3 and 6 years [Member] | Currency forwards [Member]
Loans and accounts receivable at amortized cost
Notional amount
Hedging instrument [Member] | Over 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount	2,696,473	4,432,454
Hedging instrument [Member] | Over 6 years [Member] | Cross currency swaps [Member]
Loans and accounts receivable at amortized cost
Notional amount	2,696,473
Hedging instrument [Member] | Over 6 years [Member] | Currency forwards [Member]
Loans and accounts receivable at amortized cost
Notional amount
Hedged item [Member]
Loans and accounts receivable at amortized cost
Notional amount		16,939,379
Hedged item [Member] | Due Within 1 Year [Member]
Loans and accounts receivable at amortized cost
Notional amount		5,322,890
Hedged item [Member] | Between 1 and 3 years [Member]
Loans and accounts receivable at amortized cost
Notional amount		3,686,405
Hedged item [Member] | Between 3 and 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount		3,497,630
Hedged item [Member] | Over 6 years [Member]
Loans and accounts receivable at amortized cost
Notional amount		$ 4,432,454

Derivative Financial Instrume_7

Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for interest rate risk - Inflation rate risk [Member] - CLP ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Hedged item Inflows [Member]
Hedged item
Forecasted cash flows		$ 23,015	$ 35,765
Hedged item Inflows [Member] | Within 1 year [Member]
Hedged item
Forecasted cash flows		18,219	25,328
Hedged item Inflows [Member] | Between 1 and 3 years [Member]
Hedged item
Forecasted cash flows		2,284	10,220
Hedged item Inflows [Member] | Between 3 and 6 years [Member]
Hedged item
Forecasted cash flows		2,512	217
Hedged item Outflows [Member]
Hedged item
Forecasted cash flows		(401,502)	(920,003)
Hedged item Outflows [Member] | Within 1 year [Member]
Hedged item
Forecasted cash flows		(90,303)	(356,683)
Hedged item Outflows [Member] | Between 1 and 3 years [Member]
Hedged item
Forecasted cash flows		(123,604)	(245,480)
Hedged item Outflows [Member] | Between 3 and 6 years [Member]
Hedged item
Forecasted cash flows		(104,198)	(154,689)
Hedged item Outflows [Member] | Over 6 years [Member]
Hedged item
Forecasted cash flows		(83,397)	(163,151)
Hedged item Net flows [Member]
Hedged item
Forecasted cash flows		(378,487)	(884,238)
Hedged item Net flows [Member] | Within 1 year [Member]
Hedged item
Forecasted cash flows		(72,084)	(331,355)
Hedged item Net flows [Member] | Between 1 and 3 years [Member]
Hedged item
Forecasted cash flows		(121,320)	(235,260)
Hedged item Net flows [Member] | Between 3 and 6 years [Member]
Hedged item
Forecasted cash flows		(101,686)	(154,472)
Hedged item Net flows [Member] | Over 6 years [Member]
Hedged item
Forecasted cash flows		(83,397)	(163,151)
Hedging instrument Inflows [Member]
Hedged item
Forecasted cash flows		401,502	920,003
Hedging instrument Inflows [Member] | Within 1 year [Member]
Hedged item
Forecasted cash flows		90,303	356,683
Hedging instrument Inflows [Member] | Between 1 and 3 years [Member]
Hedged item
Forecasted cash flows		123,604	245,480
Hedging instrument Inflows [Member] | Between 3 and 6 years [Member]
Hedged item
Forecasted cash flows		104,198	154,689
Hedging instrument Inflows [Member] | Over 6 years [Member]
Hedged item
Forecasted cash flows		83,397	163,151
Hedging instrument Outflows [Member]
Hedged item
Forecasted cash flows	[1]	(23,015)	(35,765)
Hedging instrument Outflows [Member] | Within 1 year [Member]
Hedged item
Forecasted cash flows	[1]	(18,219)	(25,328)
Hedging instrument Outflows [Member] | Between 1 and 3 years [Member]
Hedged item
Forecasted cash flows	[1]	(2,284)	(10,220)
Hedging instrument Outflows [Member] | Between 3 and 6 years [Member]
Hedged item
Forecasted cash flows	[1]	(2,512)	(217)
Hedging instrument Outflows [Member] | Over 6 years [Member]
Hedged item
Forecasted cash flows	[1]
Hedging instrument Net flows [Member]
Hedged item
Forecasted cash flows		378,487	884,238
Hedging instrument Net flows [Member] | Within 1 year [Member]
Hedged item
Forecasted cash flows		72,084	331,355
Hedging instrument Net flows [Member] | Between 1 and 3 years [Member]
Hedged item
Forecasted cash flows		121,320	235,260
Hedging instrument Net flows [Member] | Between 3 and 6 years [Member]
Hedged item
Forecasted cash flows		101,686	154,472
Hedging instrument Net flows [Member] | Over 6 years [Member]
Hedged item
Forecasted cash flows		$ 83,397	$ 163,151
[1]	Only includes cash flow forecast portion of the hedge instruments used to cover interest rate risk.

Derivative Financial Instrume_8

Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk - Interest rate risk [Member] - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Hedged item Inflows [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	$ 1,235,977	$ 823,394
Hedged item Inflows [Member] | Within 1 year [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	114,734	74,574
Hedged item Inflows [Member] | Between 1 and 3 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	257,698	109,486
Hedged item Inflows [Member] | Between 3 and 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	457,046	216,972
Hedged item Inflows [Member] | Over 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	406,499	422,362
Hedged item Outflows [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	(134,321)	(155,637)
Hedged item Outflows [Member] | Within 1 year [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	(32,238)	(19,466)
Hedged item Outflows [Member] | Between 1 and 3 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	(19,702)	(50,151)
Hedged item Outflows [Member] | Between 3 and 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	(55,388)	(33,140)
Hedged item Outflows [Member] | Over 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	(26,993)	(52,880)
Hedged item Net flows [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	1,101,656	667,757
Hedged item Net flows [Member] | Within 1 year [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	82,496	55,108
Hedged item Net flows [Member] | Between 1 and 3 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	237,996	59,335
Hedged item Net flows [Member] | Between 3 and 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	401,658	183,832
Hedged item Net flows [Member] | Over 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	379,506	369,482
Hedging instrument Inflows [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	134,321	155,637
Hedging instrument Inflows [Member] | Within 1 year [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	32,238	19,466
Hedging instrument Inflows [Member] | Between 1 and 3 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	19,702	50,151
Hedging instrument Inflows [Member] | Between 3 and 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	55,388	33,140
Hedging instrument Inflows [Member] | Over 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	26,993	52,880
Hedging instrument Outflows [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	(1,235,977)	(823,394)
Hedging instrument Outflows [Member] | Within 1 year [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	(114,734)	(74,574)
Hedging instrument Outflows [Member] | Between 1 and 3 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	(257,698)	(109,486)
Hedging instrument Outflows [Member] | Between 3 and 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	(457,046)	(216,972)
Hedging instrument Outflows [Member] | Over 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	(406,499)	(422,362)
Hedging instrument Net flows [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	(1,101,656)	(667,757)
Hedging instrument Net flows [Member] | Within 1 year [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	(82,496)	(55,108)
Hedging instrument Net flows [Member] | Between 1 and 3 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	(237,996)	(59,335)
Hedging instrument Net flows [Member] | Between 3 and 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	(401,658)	(183,832)
Hedging instrument Net flows [Member] | Over 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of forecasted cash flows for inflation risk [Line Items]
Forecasted cash flows	$ (379,506)	$ (369,482)

Derivative Financial Instrume_9

Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of market adjustment of cash flow hedges produced by hedge instruments - Cash Flow Hedge [Member] - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of market adjustment of cash flow hedges produced by hedge instruments [Line Items]
Cash flow hedge net gains (losses)	$ (136,765)	$ (40,435)
Interbank loans [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of market adjustment of cash flow hedges produced by hedge instruments [Line Items]
Cash flow hedge net gains (losses)	(962)	(1,872)
Issued debt instruments [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of market adjustment of cash flow hedges produced by hedge instruments [Line Items]
Cash flow hedge net gains (losses)	(6,990)	(16,345)
Debt instruments at FVOCI [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of market adjustment of cash flow hedges produced by hedge instruments [Line Items]
Cash flow hedge net gains (losses)	(25,833)	(2,905)
Loans And Accounts Receivable At Amortized Cost [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of market adjustment of cash flow hedges produced by hedge instruments [Line Items]
Cash flow hedge net gains (losses)	$ (102,980)	$ (19,313)

Derivative Financial Instrum_10

Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of income generated by cash flow hedges amount that were reclassified from other comprehensive income to income - Cash Flow Hedge [Member] - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of income generated by cash flow hedges amount that were reclassified from other comprehensive income to income [Line Items]
Cash flow hedge net gains (losses)	$ (3,148)	$ (1,075)	$ (683)
Bond hedging derivatives [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of income generated by cash flow hedges amount that were reclassified from other comprehensive income to income [Line Items]
Cash flow hedge net gains (losses)	(3,149)	(120)
Interbank loans hedging derivatives [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of income generated by cash flow hedges amount that were reclassified from other comprehensive income to income [Line Items]
Cash flow hedge net gains (losses)	$ 1	$ (955)	$ (683)

Derivative Financial Instrum_11

Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Loans And Accounts Receivable At Amortized Cost [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	$ 2,894,957	$ 7,484,451
Loans And Accounts Receivable At Amortized Cost [Member] | Within 1 year [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	1,223,126	633,300
Loans And Accounts Receivable At Amortized Cost [Member] | Between 1 and 3 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	936,352	1,789,037
Loans And Accounts Receivable At Amortized Cost [Member] | Over 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	735,479	3,466,875
Loans And Accounts Receivable At Amortized Cost [Member] | Between 3 and 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges		1,595,239
Loans And Accounts Receivable At Amortized Cost [Member] | Mortgage loans [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	2,344,957	6,834,451
Loans And Accounts Receivable At Amortized Cost [Member] | Mortgage loans [Member] | Within 1 year [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	823,126	633,300
Loans And Accounts Receivable At Amortized Cost [Member] | Mortgage loans [Member] | Between 1 and 3 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	786,352	1,189,037
Loans And Accounts Receivable At Amortized Cost [Member] | Mortgage loans [Member] | Over 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	735,479	3,466,875
Loans And Accounts Receivable At Amortized Cost [Member] | Mortgage loans [Member] | Between 3 and 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges		1,545,239
Loans And Accounts Receivable At Amortized Cost [Member] | Commercial loans [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	550,000	650,000
Loans And Accounts Receivable At Amortized Cost [Member] | Commercial loans [Member] | Within 1 year [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	400,000
Loans And Accounts Receivable At Amortized Cost [Member] | Commercial loans [Member] | Between 1 and 3 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	150,000	600,000
Loans And Accounts Receivable At Amortized Cost [Member] | Commercial loans [Member] | Between 3 and 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges		50,000
Hedging instrument [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	2,894,957	7,484,451
Hedging instrument [Member] | Within 1 year [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	1,223,126	633,300
Hedging instrument [Member] | Between 1 and 3 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	936,352	1,789,037
Hedging instrument [Member] | Over 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	735,479	3,466,875
Hedging instrument [Member] | Between 3 and 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges		1,595,239
Hedging instrument [Member] | Cross currency swaps [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	2,344,957	6,834,451
Hedging instrument [Member] | Cross currency swaps [Member] | Within 1 year [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	823,126	633,300
Hedging instrument [Member] | Cross currency swaps [Member] | Between 1 and 3 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	786,352	1,189,037
Hedging instrument [Member] | Cross currency swaps [Member] | Over 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	735,479	3,466,875
Hedging instrument [Member] | Cross currency swaps [Member] | Between 3 and 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges		1,545,239
Hedging instrument [Member] | Interest rate swaps [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	550,000	650,000
Hedging instrument [Member] | Interest rate swaps [Member] | Within 1 year [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	400,000
Hedging instrument [Member] | Interest rate swaps [Member] | Between 1 and 3 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges	$ 150,000	600,000
Hedging instrument [Member] | Interest rate swaps [Member] | Between 3 and 6 years [Member]
Derivative Financial Instruments and Hedge Accounting (Details) - Schedule of macro-hedges [Line Items]
Macro-hedges		$ 50,000

Loans and Accounts Receivable_5

Loans and Accounts Receivable at Amortized Cost (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020CLP ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019CLP ($)
Disclosure of loans and advances to customers [text block] [Abstract]
Overlays related to macroeconomically scenarios	$ 59,000
Increase of provision for loan losses		$ 2,066	$ 6,998

Loans and Accounts Receivable_6

Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of loan portfolio composition - CLP ($) $ in Thousands		Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Commercial loans
Assets before allowances		$ 34,339,893,000		$ 32,671,515,000
ECL allowance	[1]	1,036,793,000		896,095,000
Net Assets		33,303,100,000		31,775,420,000
Stage 1 [Member]
Commercial loans
Assets before allowances		30,216,324,000		29,041,636,000
ECL allowance	[1]	194,422,000		133,269,000
Stage 2 [Member]
Commercial loans
Assets before allowances		2,447,273,000		1,995,733,000
ECL allowance	[1]	149,940,000		121,261,000
Stage 3 [Member]
Commercial loans
Assets before allowances		1,676,296,000		1,634,146,000
ECL allowance	[1]	692,431,000		641,565,000
Commercial Loans [Member]
Commercial loans
Assets before allowances		16,987,189,000		15,862,325,000		$ 15,217,460,000	[2]
ECL allowance		645,072,000	[1]	506,569,000	[1]	508,190,000	[2]
Net Assets		16,342,117,000		15,355,756,000
Commercial Loans [Member] | Interbank Loans [Member]
Commercial loans
Assets before allowances		18,930,000		14,852,000
ECL allowance	[1]	1,000		1,000
Net Assets		18,929,000		14,851,000
Commercial Loans [Member] | Commercial Loans [Member]
Commercial loans
Assets before allowances		13,490,618,000		11,708,187,000
ECL allowance	[1]	498,146,000		384,124,000
Net Assets		12,992,472,000		11,324,063,000
Commercial Loans [Member] | Foreign Trade Loans [Member]
Commercial loans
Assets before allowances		1,239,271,000		1,713,633,000
ECL allowance	[1]	41,261,000		28,387,000
Net Assets		1,198,010,000		1,685,246,000
Commercial Loans [Member] | Checking Accounts Debtors [Member]
Commercial loans
Assets before allowances		125,610,000		196,893,000
ECL allowance	[1]	11,602,000		11,900,000
Net Assets		114,008,000		184,993,000
Commercial Loans [Member] | Factoring Transactions [Member]
Commercial loans
Assets before allowances		497,679,000		489,400,000
ECL allowance	[1]	4,129,000		3,296,000
Net Assets		493,550,000		486,104,000
Commercial Loans [Member] | Student Loans [Member]
Commercial loans
Assets before allowances		63,380,000		71,273,000
ECL allowance	[1]	8,798,000		9,319,000
Net Assets		54,582,000		61,954,000
Commercial Loans [Member] | Leasing Transactions [Member]
Commercial loans
Assets before allowances				1,424,862,000
ECL allowance	[1]	59,687,000		44,645,000
Net Assets		1,295,470,000		1,380,217,000
Commercial Loans [Member] | Other Loans And Account Receivable [Member]
Commercial loans
Assets before allowances		196,544		243,225,000
ECL allowance	[1]	21,448,000		24,897,000
Net Assets		175,096,000		218,328,000
Commercial Loans [Member] | Stage 1 [Member]
Commercial loans
Assets before allowances				13,802,623,000
ECL allowance	[1]	80,532,000		57,427,000
Commercial Loans [Member] | Stage 1 [Member] | Interbank Loans [Member]
Commercial loans
Assets before allowances		18,930,000		14,852,000
ECL allowance	[1]	1,000		1,000
Commercial Loans [Member] | Stage 1 [Member] | Commercial Loans [Member]
Commercial loans
Assets before allowances		11,453,377,000		10,179,002,000
ECL allowance	[1]	60,987,000		41,296,000
Commercial Loans [Member] | Stage 1 [Member] | Foreign Trade Loans [Member]
Commercial loans
Assets before allowances		979,014,000		1,519,757,000
ECL allowance	[1]	5,323,000		4,113,000
Commercial Loans [Member] | Stage 1 [Member] | Checking Accounts Debtors [Member]
Commercial loans
Assets before allowances		92,789,000		166,771,000
ECL allowance	[1]	1,253,000		1,492,000
Commercial Loans [Member] | Stage 1 [Member] | Factoring Transactions [Member]
Commercial loans
Assets before allowances		486,587,000		478,465,000
ECL allowance	[1]	1,397,000		1,158,000
Commercial Loans [Member] | Stage 1 [Member] | Student Loans [Member]
Commercial loans
Assets before allowances		49,768,000		57,206,000
ECL allowance	[1]	1,551,000		1,774,000
Commercial Loans [Member] | Stage 1 [Member] | Leasing Transactions [Member]
Commercial loans
Assets before allowances				1,184,765,000
ECL allowance	[1]	7,377,000		5,415,000
Commercial Loans [Member] | Stage 1 [Member] | Other Loans And Account Receivable [Member]
Commercial loans
Assets before allowances		163,035		201,805,000
ECL allowance	[1]	2,643,000		2,178,000
Commercial Loans [Member] | Stage 2 [Member]
Commercial loans
Assets before allowances				1,245,067,000
ECL allowance	[1]	109,767,000		55,944,000
Commercial Loans [Member] | Stage 2 [Member] | Interbank Loans [Member]
Commercial loans
Assets before allowances
ECL allowance	[1]
Commercial Loans [Member] | Stage 2 [Member] | Commercial Loans [Member]
Commercial loans
Assets before allowances		1,285,770,000		870,028,000
ECL allowance	[1]	87,295,000		41,734,000
Commercial Loans [Member] | Stage 2 [Member] | Foreign Trade Loans [Member]
Commercial loans
Assets before allowances		221,074,000		155,324,000
ECL allowance	[1]	2,786,000		705,000
Commercial Loans [Member] | Stage 2 [Member] | Checking Accounts Debtors [Member]
Commercial loans
Assets before allowances		21,315,000		16,108,000
ECL allowance	[1]	1,524,000		764,000
Commercial Loans [Member] | Stage 2 [Member] | Factoring Transactions [Member]
Commercial loans
Assets before allowances		7,207,000		7,946,000
ECL allowance	[1]	387,000		234,000
Commercial Loans [Member] | Stage 2 [Member] | Student Loans [Member]
Commercial loans
Assets before allowances		4,905,000		5,942,000
ECL allowance	[1]	714,000		1,950,000
Commercial Loans [Member] | Stage 2 [Member] | Leasing Transactions [Member]
Commercial loans
Assets before allowances		267,062		178,556,000
ECL allowance	[1]	14,934,000		8,270,000
Commercial Loans [Member] | Stage 2 [Member] | Other Loans And Account Receivable [Member]
Commercial loans
Assets before allowances		10,973		11,163,000
ECL allowance	[1]	2,127,000		2,287,000
Commercial Loans [Member] | Stage 3 [Member]
Commercial loans
Assets before allowances		910,085		814,635,000
ECL allowance	[1]	454,773,000		393,198,000
Commercial Loans [Member] | Stage 3 [Member] | Interbank Loans [Member]
Commercial loans
Assets before allowances
ECL allowance	[1]
Commercial Loans [Member] | Stage 3 [Member] | Commercial Loans [Member]
Commercial loans
Assets before allowances		751,471,000		659,157,000
ECL allowance	[1]	349,864,000		301,094,000
Commercial Loans [Member] | Stage 3 [Member] | Foreign Trade Loans [Member]
Commercial loans
Assets before allowances		39,183,000		38,552,000
ECL allowance	[1]	33,152,000		23,569,000
Commercial Loans [Member] | Stage 3 [Member] | Checking Accounts Debtors [Member]
Commercial loans
Assets before allowances		11,506,000		14,014,000
ECL allowance	[1]	8,825,000		9,644,000
Commercial Loans [Member] | Stage 3 [Member] | Factoring Transactions [Member]
Commercial loans
Assets before allowances		3,885,000		2,989,000
ECL allowance	[1]	2,345,000		1,904,000
Commercial Loans [Member] | Stage 3 [Member] | Student Loans [Member]
Commercial loans
Assets before allowances		8,707,000		8,125,000
ECL allowance	[1]	6,533,000		5,595,000
Commercial Loans [Member] | Stage 3 [Member] | Leasing Transactions [Member]
Commercial loans
Assets before allowances		72,797		61,541,000
ECL allowance	[1]	37,376,000		30,960,000
Commercial Loans [Member] | Stage 3 [Member] | Other Loans And Account Receivable [Member]
Commercial loans
Assets before allowances		22,536		30,257,000
ECL allowance	[1]	16,678,000		20,432,000
Mortgage loans [Member]
Commercial loans
Assets before allowances		12,411,825,000		11,262,995,000		10,150,981,000
ECL allowance		112,522,000	[1]	101,059,000	[1]	$ 91,270,000
Net Assets		12,299,303,000		11,161,936,000
Mortgage loans [Member] | Loans With Mortgage Finance Bonds [Member]
Commercial loans
Assets before allowances		7,809,000		12,298,000
ECL allowance	[1]	84,000		137,000
Net Assets		7,725,000		12,161,000
Mortgage loans [Member] | Endorsable Mortgage Mutual Loans [Member]
Commercial loans
Assets before allowances		92,960,000		100,152,000
ECL allowance	[1]	758,000		816,000
Net Assets		92,202,000		99,336,000
Mortgage loans [Member] | Other Mortgage Mutual Loans [Member]
Commercial loans
Assets before allowances		12,311,056,000		11,150,545,000
ECL allowance	[1]	111,680,000		100,106,000
Net Assets		12,199,376,000		11,050,439,000
Mortgage loans [Member] | Stage 1 [Member]
Commercial loans
Assets before allowances		11,518,363,000		10,275,966,000
ECL allowance	[1]	25,065,000		8,446,000
Mortgage loans [Member] | Stage 1 [Member] | Loans With Mortgage Finance Bonds [Member]
Commercial loans
Assets before allowances		6,859,000		10,774,000
ECL allowance	[1]	16,000		13,000
Mortgage loans [Member] | Stage 1 [Member] | Endorsable Mortgage Mutual Loans [Member]
Commercial loans
Assets before allowances		86,786,000		92,792,000
ECL allowance	[1]	221,000		72,000
Mortgage loans [Member] | Stage 1 [Member] | Other Mortgage Mutual Loans [Member]
Commercial loans
Assets before allowances		11,424,718,000		10,172,400,000
ECL allowance	[1]	24,828,000		8,361,000
Mortgage loans [Member] | Stage 2 [Member]
Commercial loans
Assets before allowances		392,372,000		457,948,000
ECL allowance	[1]	8,441,000		14,509,000
Mortgage loans [Member] | Stage 2 [Member] | Loans With Mortgage Finance Bonds [Member]
Commercial loans
Assets before allowances		546,000		744,000
ECL allowance	[1]	11,000		21,000
Mortgage loans [Member] | Stage 2 [Member] | Endorsable Mortgage Mutual Loans [Member]
Commercial loans
Assets before allowances		2,463,000		2,819,000
ECL allowance	[1]	63,000		103,000
Mortgage loans [Member] | Stage 2 [Member] | Other Mortgage Mutual Loans [Member]
Commercial loans
Assets before allowances		389,363,000		454,385,000
ECL allowance	[1]	8,367,000		14,385,000
Mortgage loans [Member] | Stage 3 [Member]
Commercial loans
Assets before allowances		501,090,000		529,081,000
ECL allowance	[1]	79,016,000		78,104,000
Mortgage loans [Member] | Stage 3 [Member] | Loans With Mortgage Finance Bonds [Member]
Commercial loans
Assets before allowances		404,000		780,000
ECL allowance	[1]	57,000		103,000
Mortgage loans [Member] | Stage 3 [Member] | Endorsable Mortgage Mutual Loans [Member]
Commercial loans
Assets before allowances		3,711,000		4,541,000
ECL allowance	[1]	474,000		641,000
Mortgage loans [Member] | Stage 3 [Member] | Other Mortgage Mutual Loans [Member]
Commercial loans
Assets before allowances		496,975,000		523,760,000
ECL allowance	[1]	78,485,000		77,360,000
Consumer loans [Member]
Commercial loans
Assets before allowances		4,940,879,000		5,546,195,000
ECL allowance	[1]	279,199,000		288,467,000
Net Assets		4,661,680,000		5,257,728,000
Consumer loans [Member] | Leasing Transactions [Member]
Commercial loans
Assets before allowances		3,121,000		3,952,000
ECL allowance	[1]	67,000		122,000
Net Assets		3,054,000		3,830,000
Consumer loans [Member] | Installment Consumer Loans [Member]
Commercial loans
Assets before allowances		3,688,592,000		3,917,536,000
ECL allowance	[1]	255,516,000		255,061,000
Net Assets		3,433,076,000		3,662,475,000
Consumer loans [Member] | Credit Card Balances [Member]
Commercial loans
Assets before allowances		1,125,908,000		1,377,710,000
ECL allowance	[1]	19,959,000		27,337,000
Net Assets		1,105,949,000		1,350,373,000
Consumer loans [Member] | Other Consumer Loans [Member]
Commercial loans
Assets before allowances		123,258,000		246,997,000
ECL allowance	[1]	3,657,000		5,947,000
Net Assets		119,601,000		241,050,000
Consumer loans [Member] | Stage 1 [Member]
Commercial loans
Assets before allowances		4,439,163,000		4,963,047,000
ECL allowance	[1]	88,825,000		67,396,000
Consumer loans [Member] | Stage 1 [Member] | Leasing Transactions [Member]
Commercial loans
Assets before allowances		2,956,000		3,569,000
ECL allowance	[1]	29,000		56,000
Consumer loans [Member] | Stage 1 [Member] | Installment Consumer Loans [Member]
Commercial loans
Assets before allowances		3,221,617,000		3,378,489,000
ECL allowance	[1]	76,140,000		51,289,000
Consumer loans [Member] | Stage 1 [Member] | Credit Card Balances [Member]
Commercial loans
Assets before allowances		1,097,680,000		1,341,734,000
ECL allowance	[1]	10,781,000		12,507,000
Consumer loans [Member] | Stage 1 [Member] | Other Consumer Loans [Member]
Commercial loans
Assets before allowances		116,910,000		239,255,000
ECL allowance	[1]	1,875,000		3,544,000
Consumer loans [Member] | Stage 2 [Member]
Commercial loans
Assets before allowances		236,595,000		292,718,000
ECL allowance	[1]	31,732,000		50,808,000
Consumer loans [Member] | Stage 2 [Member] | Leasing Transactions [Member]
Commercial loans
Assets before allowances		139,000		303,000
ECL allowance	[1]	22,000		30,000
Consumer loans [Member] | Stage 2 [Member] | Installment Consumer Loans [Member]
Commercial loans
Assets before allowances		211,348,000		270,347,000
ECL allowance	[1]	26,737,000		45,102,000
Consumer loans [Member] | Stage 2 [Member] | Credit Card Balances [Member]
Commercial loans
Assets before allowances		20,380,000		17,668,000
ECL allowance	[1]	4,141,000		4,894,000
Consumer loans [Member] | Stage 2 [Member] | Other Consumer Loans [Member]
Commercial loans
Assets before allowances		4,728,000		4,400,000
ECL allowance	[1]	832,000		782,000
Consumer loans [Member] | Stage 3 [Member]
Commercial loans
Assets before allowances		265,121,000		290,430,000
ECL allowance	[1]	158,642,000		170,263,000
Consumer loans [Member] | Stage 3 [Member] | Leasing Transactions [Member]
Commercial loans
Assets before allowances		26,000		80,000
ECL allowance	[1]	16,000		36,000
Consumer loans [Member] | Stage 3 [Member] | Installment Consumer Loans [Member]
Commercial loans
Assets before allowances		255,627,000		268,700,000
ECL allowance	[1]	152,639,000		158,670,000
Consumer loans [Member] | Stage 3 [Member] | Credit Card Balances [Member]
Commercial loans
Assets before allowances		7,848,000		18,308,000
ECL allowance	[1]	5,037,000		9,936,000
Consumer loans [Member] | Stage 3 [Member] | Other Consumer Loans [Member]
Commercial loans
Assets before allowances		1,620,000		3,342,000
ECL allowance	[1]	$ 950,000		$ 1,621,000
[1]	Include overlays for an amount of MCh$59,000. See Note 37.
[2]	Include loans and ECL balances of the acquired Santander Consumer Chile S.A.

Loans and Accounts Receivable_7

Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss - Commercial Loans [Member] - CLP ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020		Dec. 31, 2019
Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss [Line Items]
Gross carrying amount, Beginning balance		$ 15,862,325,000		$ 15,217,460,000	[1]
Transfers:
Transfers from stage 1 to stage 2
Transfers from stage 1 to stage 3
Transfers from stage 2 to stage 3
Transfers from stage 2 to stage 1
Transfers from stage 3 to stage 2
Transfers from stage 3 to stage 1
Net changes of financial assets		1,285,080,000		712,258,000
Write-off		(168,537,000)		(177,849,000)
FX and other adjustments		8,321,000		110,456,000
Gross carrying amount, Ending balance		16,987,189,000		15,862,325,000
Expected credit losses allowances, Beginning balance		506,569,000	[2]	508,190,000	[1]
Transfers
Transfers to stage 2		58,928,000		58,098,000
Transfers to stage 3		20,225,000		13,421,000
Transfers to stage 3		74,776,000		64,235,000
Transfers to stage 1		(22,087,000)		(23,389,000)
Transfers to stage 2		(19,188,000)		(20,997,000)
Transfers to stage 1		(40,000)		(154,000)
Net changes of the exposure and modifications in credit risk		193,594,000		87,894,000
Write-off		(167,382,000)		(177,858,000)
FX and other adjustments		(323,000)		(2,871,000)
Expected credit losses allowances, Ending balance	[2]	645,072,000		506,569,000
Stage 1 [Member]
Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss [Line Items]
Gross carrying amount, Beginning balance		13,802,623,000
Transfers:
Gross carrying amount, Ending balance				13,802,623,000
Expected credit losses allowances, Beginning balance	[2]	57,427,000
Transfers
Expected credit losses allowances, Ending balance	[2]	80,532,000		57,427,000
Stage 2 [Member]
Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss [Line Items]
Gross carrying amount, Beginning balance		1,245,067,000
Transfers:
Gross carrying amount, Ending balance				1,245,067,000
Expected credit losses allowances, Beginning balance	[2]	55,944,000
Transfers
Expected credit losses allowances, Ending balance	[2]	109,767,000		55,944,000
Stage 3 [Member]
Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss [Line Items]
Gross carrying amount, Beginning balance		814,635,000
Transfers:
Gross carrying amount, Ending balance		910,085		814,635,000
Expected credit losses allowances, Beginning balance	[2]	393,198,000
Transfers
Expected credit losses allowances, Ending balance	[2]	454,773,000		393,198,000
Individual [Member] | Stage 1 [Member]
Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss [Line Items]
Gross carrying amount, Beginning balance		10,208,264,000		9,695,837,000	[1]
Transfers:
Transfers from stage 1 to stage 2		(1,355,492,000)		(518,990,000)
Transfers from stage 1 to stage 3		(2,492,000)
Transfers from stage 2 to stage 3
Transfers from stage 2 to stage 1		239,349,000		158,935,000
Transfers from stage 3 to stage 2
Transfers from stage 3 to stage 1
Net changes of financial assets		676,413,000		542,311,000
Write-off
FX and other adjustments		(1,243,000)		330,171,000
Gross carrying amount, Ending balance		9,764,799,000		10,208,264,000
Expected credit losses allowances, Beginning balance		21,539,000		30,189,000	[1]
Transfers
Transfers to stage 2		(23,652,000)		(7,786,000)
Transfers to stage 3		(9,000)
Transfers to stage 3
Transfers to stage 1		2,919,000		1,576,000
Transfers to stage 2
Transfers to stage 1
Net changes of the exposure and modifications in credit risk		39,971,000		(6,948,000)
Write-off
FX and other adjustments		(1,179,000)		4,508,000
Expected credit losses allowances, Ending balance		39,589,000		21,539,000
Individual [Member] | Stage 2 [Member]
Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss [Line Items]
Gross carrying amount, Beginning balance		1,004,967,000		867,783,000	[1]
Transfers:
Transfers from stage 1 to stage 2		1,355,492,000		518,990,000
Transfers from stage 1 to stage 3
Transfers from stage 2 to stage 3		(198,124,000)		(132,136,000)
Transfers from stage 2 to stage 1		(239,349,000)		(158,935,000)
Transfers from stage 3 to stage 2		4,022,000		11,229,000
Transfers from stage 3 to stage 1
Net changes of financial assets		(337,291,000)		(119,884,000)
Write-off
FX and other adjustments		(2,000)		17,920,000
Gross carrying amount, Ending balance		1,589,715,000		1,004,967,000
Expected credit losses allowances, Beginning balance		30,389,000		31,066,000	[1]
Transfers
Transfers to stage 2		50,253,000		17,237,000
Transfers to stage 3
Transfers to stage 3		(25,214,000)		(8,567,000)
Transfers to stage 1		(9,322,000)		(7,525,000)
Transfers to stage 2		943,000		685,000
Transfers to stage 1
Net changes of the exposure and modifications in credit risk		18,462,000		(3,151,000)
Write-off
FX and other adjustments		(59,000)		644,000
Expected credit losses allowances, Ending balance		65,452,000		30,389,000
Individual [Member] | Stage 3 [Member]
Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss [Line Items]
Gross carrying amount, Beginning balance		401,007,000		386,929,000	[1]
Transfers:
Transfers from stage 1 to stage 2
Transfers from stage 1 to stage 3		2,492,000
Transfers from stage 2 to stage 3		198,124,000		132,136,000
Transfers from stage 2 to stage 1
Transfers from stage 3 to stage 2		(4,022,000)		(11,229,000)
Transfers from stage 3 to stage 1
Net changes of financial assets		(537,000)		(24,788,000)
Write-off		(66,989,000)		(83,845,000)
FX and other adjustments		(9,000)		1,804,000
Gross carrying amount, Ending balance		530,066,000		401,007,000
Expected credit losses allowances, Beginning balance		196,165,000		198,115,000	[1]
Transfers
Transfers to stage 2
Transfers to stage 3		1,089,000
Transfers to stage 3		73,885,000		44,203,000
Transfers to stage 1
Transfers to stage 2		(1,560,000)		(3,867,000)
Transfers to stage 1
Net changes of the exposure and modifications in credit risk		58,915,000		41,365,000
Write-off		(66,989,000)		(83,844,000)
FX and other adjustments				193,000
Expected credit losses allowances, Ending balance		261,505,000		196,165,000
Collective [Member] | Stage 1 [Member]
Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss [Line Items]
Gross carrying amount, Beginning balance		3,594,359,000		3,644,407,000	[1]
Transfers:
Transfers from stage 1 to stage 2		(277,926,000)		(347,678,000)
Transfers from stage 1 to stage 3		(52,304,000)		(41,696,000)
Transfers from stage 2 to stage 3
Transfers from stage 2 to stage 1		162,768,000		159,009,000
Transfers from stage 3 to stage 2
Transfers from stage 3 to stage 1		138,000		1,134,000
Net changes of financial assets		1,056,882,000		415,524,000
Write-off
FX and other adjustments		10,082,000		(236,341,000)
Gross carrying amount, Ending balance		4,493,999,000		3,594,359,000
Expected credit losses allowances, Beginning balance		35,888,000		44,104,000	[1]
Transfers
Transfers to stage 2		(16,137,000)		(20,058,000)
Transfers to stage 3		(3,007,000)		(2,666,000)
Transfers to stage 3
Transfers to stage 1		4,921,000		4,838,000
Transfers to stage 2
Transfers to stage 1		5,000		88,000
Net changes of the exposure and modifications in credit risk		19,264,000		14,199,000
Write-off
FX and other adjustments		9,000		(4,617,000)
Expected credit losses allowances, Ending balance		40,943,000		35,888,000
Collective [Member] | Stage 2 [Member]
Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss [Line Items]
Gross carrying amount, Beginning balance		240,100,000		235,239,000	[1]
Transfers:
Transfers from stage 1 to stage 2		277,926,000		347,678,000
Transfers from stage 1 to stage 3
Transfers from stage 2 to stage 3		(163,049,000)		(230,125,000)
Transfers from stage 2 to stage 1		(162,768,000)		(159,009,000)
Transfers from stage 3 to stage 2		117,446,000		120,293,000
Transfers from stage 3 to stage 1
Net changes of financial assets		(80,505,000)		(68,960,000)
Write-off
FX and other adjustments		(559,000)		(5,016,000)
Gross carrying amount, Ending balance		228,591,000		240,100,000
Expected credit losses allowances, Beginning balance		25,555,000		24,945,000	[1]
Transfers
Transfers to stage 2		48,464,000		68,705,000
Transfers to stage 3
Transfers to stage 3		(29,540,000)		(42,601,000)
Transfers to stage 1		(20,605,000)		(22,278,000)
Transfers to stage 2		4,424,000		9,667,000
Transfers to stage 1
Net changes of the exposure and modifications in credit risk		15,122,000		(12,533,000)
Write-off
FX and other adjustments		895,000		(350,000)
Expected credit losses allowances, Ending balance		44,315,000		25,555,000
Collective [Member] | Stage 3 [Member]
Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss [Line Items]
Gross carrying amount, Beginning balance		413,628,000		387,265,000	[1]
Transfers:
Transfers from stage 1 to stage 2
Transfers from stage 1 to stage 3		52,304,000		41,696,000
Transfers from stage 2 to stage 3		163,049,000		230,125,000
Transfers from stage 2 to stage 1
Transfers from stage 3 to stage 2		(117,446,000)		(120,293,000)
Transfers from stage 3 to stage 1		(138,000)		(1,134,000)
Net changes of financial assets		(29,882,000)		(31,945,000)
Write-off		(101,548,000)		(94,004,000)
FX and other adjustments		52,000		1,918,000
Gross carrying amount, Ending balance		380,019,000		413,628,000
Expected credit losses allowances, Beginning balance		197,033,000		179,771,000	[1]
Transfers
Transfers to stage 2
Transfers to stage 3		22,152,000		16,087,000
Transfers to stage 3		55,645,000		71,200,000
Transfers to stage 1
Transfers to stage 2		(22,995,000)		(27,482,000)
Transfers to stage 1		(45,000)		(242,000)
Net changes of the exposure and modifications in credit risk		41,860,000		54,962,000
Write-off		(100,393,000)		(94,014,000)
FX and other adjustments		11,000		(3,249,000)
Expected credit losses allowances, Ending balance		$ 193,268,000		$ 197,033,000
[1]	Include loans and ECL balances of the acquired Santander Consumer Chile S.A.
[2]	Include overlays for an amount of MCh$59,000. See Note 37.

Loans and Accounts Receivable_8

Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss - Mortgages [Member] - CLP ($) $ in Millions		12 Months Ended
		Dec. 31, 2020		Dec. 31, 2019
Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss [Line Items]
Gross carrying amount, Beginning balance		$ 11,262,995		$ 10,150,981
Transfers:
Transfers from stage 1 to stage 2
Transfers from stage 1 to stage 3
Transfers from stage 2 to stage 3
Transfers from stage 2 to stage 1
Transfers from stage 3 to stage 2
Transfers from stage 3 to stage 1
Net changes of financial assets		1,174,311		1,072,202
Write-off		(25,831)		(34,184)
FX and other adjustments		350		73,996
Gross carrying amount, Ending balance		12,411,825		11,262,995
Expected credit losses allowances, Beginning balance		101,059	[1]	91,270
Transfers
Transfers from stage 1 to stage 2		7,252		17,191
Transfers from stage 1 to stage 3		4,076		5,683
Transfers from stage 2 to stage 3		11,111		19,056
Transfers from stage 2 to stage 1		(10,725)		(12,475)
Transfers from stage 3 to stage 2		(21,113)		(20,962)
Transfers from stage 3 to stage 1		(35)		(187)
Net changes of the exposure and modifications in credit risk		46,723		31,162
Write-off		(25,831)		(34,184)
FX and other adjustments		5		4,505
Expected credit losses allowances, Ending balance	[1]	112,522		101,059
Stage 1 [Member]
Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss [Line Items]
Gross carrying amount, Beginning balance		10,275,966
Transfers:
Gross carrying amount, Ending balance		11,518,363		10,275,966
Expected credit losses allowances, Beginning balance	[1]	8,446
Transfers
Expected credit losses allowances, Ending balance	[1]	25,065		8,446
Stage 2 [Member]
Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss [Line Items]
Gross carrying amount, Beginning balance		457,948
Transfers:
Gross carrying amount, Ending balance		392,372		457,948
Expected credit losses allowances, Beginning balance	[1]	14,509
Transfers
Expected credit losses allowances, Ending balance	[1]	8,441		14,509
Stage 3 [Member]
Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss [Line Items]
Gross carrying amount, Beginning balance		529,081
Transfers:
Gross carrying amount, Ending balance		501,090		529,081
Expected credit losses allowances, Beginning balance	[1]	78,104
Transfers
Expected credit losses allowances, Ending balance	[1]	79,016		78,104
Collective [Member] | Stage 1 [Member]
Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss [Line Items]
Gross carrying amount, Beginning balance		10,275,966		9,258,962
Transfers:
Transfers from stage 1 to stage 2		(248,167)		(481,646)
Transfers from stage 1 to stage 3		(53,621)		(60,329)
Transfers from stage 2 to stage 3
Transfers from stage 2 to stage 1		321,954		361,293
Transfers from stage 3 to stage 2
Transfers from stage 3 to stage 1		463		2,338
Net changes of financial assets		1,221,898		1,131,941
Write-off
FX and other adjustments		(130)		63,407
Gross carrying amount, Ending balance		11,518,363		10,275,966
Expected credit losses allowances, Beginning balance		8,446		9,006
Transfers
Transfers from stage 1 to stage 2		(5,250)		(3,318)
Transfers from stage 1 to stage 3		(472)		(311)
Transfers from stage 2 to stage 3
Transfers from stage 2 to stage 1		3,187		1,374
Transfers from stage 3 to stage 2
Transfers from stage 3 to stage 1		2		6
Net changes of the exposure and modifications in credit risk		19,162		1,655
Write-off
FX and other adjustments		(10)		34
Expected credit losses allowances, Ending balance		25,065		8,446
Collective [Member] | Stage 2 [Member]
Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss [Line Items]
Gross carrying amount, Beginning balance		457,948		447,496
Transfers:
Transfers from stage 1 to stage 2		248,167		481,646
Transfers from stage 1 to stage 3
Transfers from stage 2 to stage 3		(215,547)		(333,706)
Transfers from stage 2 to stage 1		(321,954)		(361,293)
Transfers from stage 3 to stage 2		248,635		250,896
Transfers from stage 3 to stage 1
Net changes of financial assets		(25,440)		(35,200)
Write-off
FX and other adjustments		563		8,109
Gross carrying amount, Ending balance		392,372		457,948
Expected credit losses allowances, Beginning balance		14,509		15,102
Transfers
Transfers from stage 1 to stage 2		12,502		20,509
Transfers from stage 1 to stage 3
Transfers from stage 2 to stage 3		(8,923)		(12,598)
Transfers from stage 2 to stage 1		(13,912)		(13,849)
Transfers from stage 3 to stage 2		7,033		8,341
Transfers from stage 3 to stage 1
Net changes of the exposure and modifications in credit risk		(2,791)		(3,054)
Write-off
FX and other adjustments		23		58
Expected credit losses allowances, Ending balance		8,441		14,509
Collective [Member] | Stage 3 [Member]
Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss [Line Items]
Gross carrying amount, Beginning balance		529,081		444,523
Transfers:
Transfers from stage 1 to stage 2
Transfers from stage 1 to stage 3		53,621		60,329
Transfers from stage 2 to stage 3		215,547		333,706
Transfers from stage 2 to stage 1
Transfers from stage 3 to stage 2		(248,635)		(250,896)
Transfers from stage 3 to stage 1		(463)		(2,338)
Net changes of financial assets		(22,147)		(24,539)
Write-off		(25,831)		(34,184)
FX and other adjustments		(83)		2,480
Gross carrying amount, Ending balance		501,090		529,081
Expected credit losses allowances, Beginning balance		78,104		67,162
Transfers
Transfers from stage 1 to stage 2
Transfers from stage 1 to stage 3		4,548		5,994
Transfers from stage 2 to stage 3		20,034		31,654
Transfers from stage 2 to stage 1
Transfers from stage 3 to stage 2		(28,146)		(29,303)
Transfers from stage 3 to stage 1		(37)		(193)
Net changes of the exposure and modifications in credit risk		30,352		32,561
Write-off		(25,831)		(34,184)
FX and other adjustments		(8)		4,413
Expected credit losses allowances, Ending balance		$ 79,016		$ 78,104
[1]	Include overlays for an amount of MCh$59,000. See Note 37.

Loans and Accounts Receivable_9

Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Collective [Member] | Consumer Loans [Member] | Stage 1 [Member]
Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss [Line Items]
Gross carrying amount, Beginning balance	$ 4,963,047	$ 4,727,464	[1]
Transfers:
Transfers from stage 1 to stage 2	(410,942)	(358,403)
Transfers from stage 1 to stage 3	(16,962)	(25,210)
Transfers from stage 2 to stage 3
Transfers from stage 2 to stage 1	238,800	130,611
Transfers from stage 3 to stage 2
Transfers from stage 3 to stage 1	2,225	514
Net changes of financial assets	(337,006)	430,777
Write-off
FX and other adjustments	1	57,294
Gross carrying amount, Ending balance	4,439,163	4,963,047
Expected credit losses allowances, Beginning balance	67,396	75,495	[1]
Transfers:
Transfers to stage 2	(36,422)	(28,717)
Transfers to stage 3	(1,484)	(1,633)
Transfers to stage 3
Transfers to stage 1	13,589	7,941
Transfers to stage 2
Transfers to stage 1	254	47
Net changes of the exposure and modifications in the credit risk	45,492	15,641
Write-off
FX and other adjustments		(1,378)
Expected credit losses allowances, Ending balance	88,825	67,396
Collective [Member] | Consumer Loans [Member] | Stage 2 [Member]
Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss [Line Items]
Gross carrying amount, Beginning balance	292,718	295,132	[1]
Transfers:
Transfers from stage 1 to stage 2	410,942	358,403
Transfers from stage 1 to stage 3
Transfers from stage 2 to stage 3	(223,169)	(248,494)
Transfers from stage 2 to stage 1	(238,800)	(130,611)
Transfers from stage 3 to stage 2	57,574	56,489
Transfers from stage 3 to stage 1
Net changes of financial assets	(62,658)	(45,093)
Write-off
FX and other adjustments	(12)	6,892
Gross carrying amount, Ending balance	236,595	292,718
Expected credit losses allowances, Beginning balance	50,808	60,467	[1]
Transfers:
Transfers to stage 2	95,850	109,916
Transfers to stage 3
Transfers to stage 3	(75,229)	(78,909)
Transfers to stage 1	(41,928)	(32,506)
Transfers to stage 2	10,162	17,002
Transfers to stage 1
Net changes of the exposure and modifications in the credit risk	(7,926)	(25,712)
Write-off
FX and other adjustments	(5)	550
Expected credit losses allowances, Ending balance	31,732	50,808
Collective [Member] | Consumer Loans [Member] | Stage 3 [Member]
Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss [Line Items]
Gross carrying amount, Beginning balance	290,430	300,193	[1]
Transfers:
Transfers from stage 1 to stage 2
Transfers from stage 1 to stage 3	16,962	25,210
Transfers from stage 2 to stage 3	223,169	248,494
Transfers from stage 2 to stage 1
Transfers from stage 3 to stage 2	(57,574)	(56,489)
Transfers from stage 3 to stage 1	(2,225)	(514)
Net changes of financial assets	13,765	(3,605)
Write-off	(219,402)	(223,919)
FX and other adjustments	(4)	1,060
Gross carrying amount, Ending balance	265,121	290,430
Expected credit losses allowances, Beginning balance	170,263	165,052	[1]
Transfers:
Transfers to stage 2
Transfers to stage 3	9,061	11,699
Transfers to stage 3	108,792	111,334
Transfers to stage 1
Transfers to stage 2	(28,649)	(31,914)
Transfers to stage 1	(865)	(233)
Net changes of the exposure and modifications in the credit risk	104,328	135,298
Write-off	(204,286)	(223,919)
FX and other adjustments	(2)	2,946
Expected credit losses allowances, Ending balance	158,642	170,263
Consumer Loans [Member]
Loans and Accounts Receivable at Amortized Cost (Details) - Schedule of gross carrying amount expected credit loss [Line Items]
Gross carrying amount, Beginning balance	5,546,195	5,322,789	[1]
Transfers:
Transfers from stage 1 to stage 2
Transfers from stage 1 to stage 3
Transfers from stage 2 to stage 3
Transfers from stage 2 to stage 1
Transfers from stage 3 to stage 2
Transfers from stage 3 to stage 1
Net changes of financial assets	(385,899)	382,079
Write-off	(219,402)	(223,919)
FX and other adjustments	(15)	65,246
Gross carrying amount, Ending balance	4,940,879	5,546,195
Expected credit losses allowances, Beginning balance	288,467	301,014	[1]
Transfers:
Transfers to stage 2	59,428	81,199
Transfers to stage 3	7,577	10,066
Transfers to stage 3	33,563	32,425
Transfers to stage 1	(28,339)	(24,565)
Transfers to stage 2	(18,487)	(14,912)
Transfers to stage 1	(611)	(186)
Net changes of the exposure and modifications in the credit risk	141,894	125,227
Write-off	(204,286)	(223,919)
FX and other adjustments	(7)	2,118
Expected credit losses allowances, Ending balance	$ 279,199	$ 288,467
[1]	Include loans and ECL balances of the acquired Santander Consumer Chile S.A.

Loans and Accounts Receivabl_10

Loans and Accounts Receivable at Fair Value Through Other Comprehensive Income (Details) - Schedule of gross carrying amount - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Gross carrying amount, Beginning balance	$ 66,166	$ 68,694
Transfers
Transfers to stage 1
Transfers to stage 2
Transfers to stage 3
Net changes on financial assets	3,857	(3,486)
Write-off
Foreign Exchange adjustments and others	662	958
Gross carrying amount, Ending balance	70,685	66,166
ECL allowance, Beginning balance	101	106
Transfers
Transfers to stage 1
Transfers to stage 2
Transfers to stage 3
Net changes of the exposure and modifications in the credit risk	1,252	47
Write-off
Foreign Exchange adjustments and others	1	(52)
ECL allowance, Ending balance	1,354	101
Individual [Member] | Stage 1 [Member]
Gross carrying amount, Beginning balance	66,166	63,745
Transfers
Transfers to stage 1
Transfers to stage 2
Transfers to stage 3
Net changes on financial assets	3,857	1,428
Write-off
Foreign Exchange adjustments and others	662	993
Gross carrying amount, Ending balance	70,685	66,166
ECL allowance, Beginning balance	101	88
Transfers
Transfers to stage 1
Transfers to stage 2
Transfers to stage 3
Net changes of the exposure and modifications in the credit risk	1,252	65
Write-off
Foreign Exchange adjustments and others	1	(52)
ECL allowance, Ending balance	1,354	101
Individual [Member] | Stage 2 [Member]
Gross carrying amount, Beginning balance		4,949
Transfers
Transfers to stage 1
Transfers to stage 2
Transfers to stage 3
Net changes on financial assets		(4,914)
Write-off
Foreign Exchange adjustments and others		(35)
Gross carrying amount, Ending balance
ECL allowance, Beginning balance		18
Transfers
Transfers to stage 1
Transfers to stage 2
Transfers to stage 3
Net changes of the exposure and modifications in the credit risk		(18)
Write-off
Foreign Exchange adjustments and others
ECL allowance, Ending balance
Individual [Member] | Stage 3 [Member]
Gross carrying amount, Beginning balance
Transfers
Transfers to stage 1
Transfers to stage 2
Transfers to stage 3
Net changes on financial assets
Write-off
Foreign Exchange adjustments and others
Gross carrying amount, Ending balance
ECL allowance, Beginning balance
Transfers
Transfers to stage 1
Transfers to stage 2
Transfers to stage 3
Net changes of the exposure and modifications in the credit risk
Write-off
Foreign Exchange adjustments and others
ECL allowance, Ending balance

Debt Instruments at Fair Valu_3

Debt Instruments at Fair Value Through Other Comprehensive Income (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019CLP ($)	Dec. 31, 2020CLP ($)
Debt Instruments at Fair Value Through Other Comprehensive Income (Details) [Line Items]
Available for sale investments		$ 390,954	$ 258,183
valuation adjustment	$ 102,855	29,184
Comder Contraparte Central S.A. [Member]
Debt Instruments at Fair Value Through Other Comprehensive Income (Details) [Line Items]
Available for sale investments		65,140	158,600
London Clearing House (LCH) [Member]
Debt Instruments at Fair Value Through Other Comprehensive Income (Details) [Line Items]
Available for sale investments		73,109	$ 67,685
Total Attributable To Shareholders Of The Bank [Member]
Debt Instruments at Fair Value Through Other Comprehensive Income (Details) [Line Items]
valuation adjustment	101,696	28,135
Non-controlling Interest [Member]
Debt Instruments at Fair Value Through Other Comprehensive Income (Details) [Line Items]
valuation adjustment	$ 1,159	$ 1,049

Debt Instruments at Fair Valu_4

Debt Instruments at Fair Value Through Other Comprehensive Income (Details) - Schedule of debt instrument - CLP ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Debt instruments at fair value through other comprehensive income		$ 7,162,542	$ 4,010,272
Chilean Central Bank And Government Securities [Member]
Debt instruments at fair value through other comprehensive income		6,353,360	3,367,557
Chilean Central Bank And Government Securities [Member] | Chilean Central Bank Bonds [Member]
Debt instruments at fair value through other comprehensive income			272,802
Chilean Central Bank And Government Securities [Member] | Chilean Central Bank Notes [Member]
Debt instruments at fair value through other comprehensive income		1,008,450	1,186,724
Chilean Central Bank And Government Securities [Member] | Other Chilean Central Bank And Government Securities [Member]
Debt instruments at fair value through other comprehensive income	[1]	5,344,910	1,908,031
Chilean Central Bank And Government Securities [Member] | Securities Sold Under Repurchase Agreements [Member]
Debt instruments at fair value through other comprehensive income		969,508	379,294
Other Chilean Securities [Member]
Debt instruments at fair value through other comprehensive income		16,731	19,556
Other Chilean Securities [Member] | Securities Sold Under Repurchase Agreements [Member]
Debt instruments at fair value through other comprehensive income		399	131
Other Chilean Securities [Member] | Time Deposits In Chilean Financial Institutions [Member]
Debt instruments at fair value through other comprehensive income		492	398
Other Chilean Securities [Member] | Mortgage Finance Bonds Of Chilean Financial Institutions [Member]
Debt instruments at fair value through other comprehensive income		14,022	16,748
Other Chilean Securities [Member] | Other Instruments Issued in The Country [Member]
Debt instruments at fair value through other comprehensive income		2,217	2,410
Foreign Financial Securities [Member]
Debt instruments at fair value through other comprehensive income		792,451	623,159
Foreign Financial Securities [Member] | Securities Sold Under Repurchase Agreements [Member]
Debt instruments at fair value through other comprehensive income
Foreign Financial Securities [Member] | Foreign Central Banks And Government Securities [Member]
Debt instruments at fair value through other comprehensive income		269,803	197,685
Foreign Financial Securities [Member] | Other Foreign Financial Securities [Member]
Debt instruments at fair value through other comprehensive income		$ 522,648	$ 425,474
[1]	Includes Treasury bonds in Chilean pesos and UF.

Debt Instruments at Fair Valu_5

Debt Instruments at Fair Value Through Other Comprehensive Income (Details) - Schedule of available for sale investments cumulative unrealized profit and loss - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Chilean central bank and government securities
Amortized cost		$ (39,634)
Fair value	$ 7,062,407	3,981,088
Unrealized profit	7,162,542	4,010,272
Unrealized loss	159,535	68,818
Later than one year [member]
Chilean central bank and government securities
Amortized cost	(56,680)	(39,634)
Fair value
Unrealized profit
Unrealized loss
Due Within 1 Year [Member]
Chilean central bank and government securities
Amortized cost	(56,680)
Fair value	7,062,407	3,981,088
Unrealized profit	7,162,542	4,010,272
Unrealized loss	159,535	68,818
Chilean Central Bank And Government Securities [Member]
Chilean central bank and government securities
Amortized cost		(27,115)
Fair value	6,296,639	3,352,833
Unrealized profit	6,353,360	3,367,557
Unrealized loss	96,180	41,839
Chilean Central Bank And Government Securities [Member] | Chilean Central Bank Bonds [Member]
Chilean central bank and government securities
Amortized cost		(1,777)
Fair value		270,979
Unrealized profit		272,802
Unrealized loss		3,600
Chilean Central Bank And Government Securities [Member] | Chilean Central Bank Notes [Member]
Chilean central bank and government securities
Fair value	1,008,450	1,186,487
Unrealized profit	1,008,450	1,186,724
Unrealized loss		237
Chilean Central Bank And Government Securities [Member] | Other Chilean Central Bank And Government Securities [Member]
Chilean central bank and government securities
Amortized cost		(25,338)
Fair value	5,288,189	1,895,367
Unrealized profit	5,344,910	1,908,031
Unrealized loss	96,180	38,002
Chilean Central Bank And Government Securities [Member] | Later than one year [member]
Chilean central bank and government securities
Amortized cost	(36,739)	(27,115)
Fair value
Unrealized profit
Unrealized loss
Chilean Central Bank And Government Securities [Member] | Later than one year [member] | Chilean Central Bank Bonds [Member]
Chilean central bank and government securities
Amortized cost		(1,777)
Fair value
Unrealized profit
Unrealized loss
Chilean Central Bank And Government Securities [Member] | Later than one year [member] | Chilean Central Bank Notes [Member]
Chilean central bank and government securities
Amortized cost
Fair value
Unrealized profit
Unrealized loss
Chilean Central Bank And Government Securities [Member] | Later than one year [member] | Other Chilean Central Bank And Government Securities [Member]
Chilean central bank and government securities
Amortized cost	(36,739)	(25,338)
Fair value
Unrealized profit
Unrealized loss
Chilean Central Bank And Government Securities [Member] | Due Within 1 Year [Member]
Chilean central bank and government securities
Amortized cost	(36,739)
Fair value	6,296,639	3,352,833
Unrealized profit	6,353,360	3,367,557
Unrealized loss	96,180	41,839
Chilean Central Bank And Government Securities [Member] | Due Within 1 Year [Member] | Chilean Central Bank Bonds [Member]
Chilean central bank and government securities
Fair value		270,979
Unrealized profit		272,802
Unrealized loss		3,600
Chilean Central Bank And Government Securities [Member] | Due Within 1 Year [Member] | Chilean Central Bank Notes [Member]
Chilean central bank and government securities
Fair value	1,008,450	1,186,487
Unrealized profit	1,008,450	1,186,724
Unrealized loss		237
Chilean Central Bank And Government Securities [Member] | Due Within 1 Year [Member] | Other Chilean Central Bank And Government Securities [Member]
Chilean central bank and government securities
Amortized cost	(36,739)
Fair value	5,288,189	1,895,367
Unrealized profit	5,344,910	1,908,031
Unrealized loss	96,180	38,002
Other Chilean Securities [Member]
Chilean central bank and government securities
Fair value	13,897	16,767
Unrealized profit	16,731	19,556
Unrealized loss	2,834	2,789
Other Chilean Securities [Member] | Time Deposits In Chilean Financial Institutions [Member]
Chilean central bank and government securities
Fair value	299	398
Unrealized profit	299	398
Unrealized loss
Other Chilean Securities [Member] | Mortgage Finance Bonds Of Chilean Financial Institutions [Member]
Chilean central bank and government securities
Fair value	13,293	15,962
Unrealized profit	14,022	16,748
Unrealized loss	729	786
Other Chilean Securities [Member] | Chilean Financial Institution Bonds [Member]
Chilean central bank and government securities
Amortized cost
Fair value
Unrealized profit
Unrealized loss
Other Chilean Securities [Member] | Chilean Corporate Bonds [Member]
Chilean central bank and government securities
Amortized cost
Fair value
Unrealized profit
Unrealized loss
Other Chilean Securities [Member] | Other Instruments Issued in The Country [Member]
Chilean central bank and government securities
Fair value	305	407
Unrealized profit	2,410	2,410
Unrealized loss	2,105	2,003
Other Chilean Securities [Member] | Later than one year [member]
Chilean central bank and government securities
Amortized cost
Fair value
Unrealized profit
Unrealized loss
Other Chilean Securities [Member] | Later than one year [member] | Time Deposits In Chilean Financial Institutions [Member]
Chilean central bank and government securities
Amortized cost
Fair value
Unrealized profit
Unrealized loss
Other Chilean Securities [Member] | Later than one year [member] | Mortgage Finance Bonds Of Chilean Financial Institutions [Member]
Chilean central bank and government securities
Amortized cost
Fair value
Unrealized profit
Unrealized loss
Other Chilean Securities [Member] | Later than one year [member] | Chilean Financial Institution Bonds [Member]
Chilean central bank and government securities
Amortized cost
Fair value
Unrealized profit
Unrealized loss
Other Chilean Securities [Member] | Later than one year [member] | Chilean Corporate Bonds [Member]
Chilean central bank and government securities
Amortized cost
Fair value
Unrealized profit
Unrealized loss
Other Chilean Securities [Member] | Later than one year [member] | Other Instruments Issued in The Country [Member]
Chilean central bank and government securities
Amortized cost
Fair value
Unrealized profit
Unrealized loss
Other Chilean Securities [Member] | Due Within 1 Year [Member]
Chilean central bank and government securities
Fair value	13,897	16,767
Unrealized profit	16,731	19,556
Unrealized loss	2,834	2,789
Other Chilean Securities [Member] | Due Within 1 Year [Member] | Time Deposits In Chilean Financial Institutions [Member]
Chilean central bank and government securities
Fair value	299	398
Unrealized profit	299	398
Unrealized loss
Other Chilean Securities [Member] | Due Within 1 Year [Member] | Mortgage Finance Bonds Of Chilean Financial Institutions [Member]
Chilean central bank and government securities
Fair value	13,293	15,962
Unrealized profit	14,022	16,748
Unrealized loss	729	786
Other Chilean Securities [Member] | Due Within 1 Year [Member] | Chilean Financial Institution Bonds [Member]
Chilean central bank and government securities
Amortized cost
Fair value
Unrealized profit
Unrealized loss
Other Chilean Securities [Member] | Due Within 1 Year [Member] | Chilean Corporate Bonds [Member]
Chilean central bank and government securities
Amortized cost
Fair value
Unrealized profit
Unrealized loss
Other Chilean Securities [Member] | Due Within 1 Year [Member] | Other Instruments Issued in The Country [Member]
Chilean central bank and government securities
Fair value	305	407
Unrealized profit	2,410	2,410
Unrealized loss	2,105	2,003
Foreign Financial Securities [Member]
Chilean central bank and government securities
Fair value	751,871
Unrealized profit	792,451
Unrealized loss	60,521
Foreign Financial Securities [Member] | Foreign Central Banks And Government Securities [Member]
Chilean central bank and government securities
Fair value	269,477
Unrealized profit	269,803
Unrealized loss	20,267
Foreign Financial Securities [Member] | Other Foreign Financial Securities [Member]
Chilean central bank and government securities
Fair value	482,394
Unrealized profit	522,648
Unrealized loss	40,254
Foreign Financial Securities [Member] | Later than one year [member]
Chilean central bank and government securities
Amortized cost	(19,941)
Fair value
Unrealized profit
Unrealized loss
Foreign Financial Securities [Member] | Later than one year [member] | Foreign Central Banks And Government Securities [Member]
Chilean central bank and government securities
Amortized cost	(19,941)
Fair value
Unrealized profit
Unrealized loss
Foreign Financial Securities [Member] | Later than one year [member] | Other Foreign Financial Securities [Member]
Chilean central bank and government securities
Amortized cost
Fair value
Unrealized profit
Unrealized loss
Foreign Financial Securities [Member] | Due Within 1 Year [Member]
Chilean central bank and government securities
Amortized cost	(19,941)
Fair value	751,871
Unrealized profit	792,451
Unrealized loss	60,521
Foreign Financial Securities [Member] | Due Within 1 Year [Member] | Foreign Central Banks And Government Securities [Member]
Chilean central bank and government securities
Amortized cost	(19,941)
Fair value	269,477
Unrealized profit	269,803
Unrealized loss	20,267
Foreign Financial Securities [Member] | Due Within 1 Year [Member] | Other Foreign Financial Securities [Member]
Chilean central bank and government securities
Fair value	482,394
Unrealized profit	522,648
Unrealized loss	$ 40,254
Foreign Central Banks And Government Securities [Member]
Chilean central bank and government securities
Amortized cost		(12,519)
Fair value		611,488
Unrealized profit		623,159
Unrealized loss		24,190
Foreign Central Banks And Government Securities [Member] | Other Foreign Financial Securities [Member]
Chilean central bank and government securities
Amortized cost		(1,074)
Fair value		413,468
Unrealized profit		425,474
Unrealized loss		13,080
Foreign Central Banks And Government Securities [Member] | Foreign Financial Securities [Member]
Chilean central bank and government securities
Amortized cost		(11,445)
Fair value		198,020
Unrealized profit		197,685
Unrealized loss		11,110
Foreign Central Banks And Government Securities [Member] | Later than one year [member]
Chilean central bank and government securities
Amortized cost		(12,519)
Fair value
Unrealized profit
Unrealized loss
Foreign Central Banks And Government Securities [Member] | Later than one year [member] | Other Foreign Financial Securities [Member]
Chilean central bank and government securities
Amortized cost		(1,074)
Fair value
Unrealized profit
Unrealized loss
Foreign Central Banks And Government Securities [Member] | Later than one year [member] | Foreign Financial Securities [Member]
Chilean central bank and government securities
Amortized cost		(11,445)
Fair value
Unrealized profit
Unrealized loss
Foreign Central Banks And Government Securities [Member] | Due Within 1 Year [Member]
Chilean central bank and government securities
Fair value		611,488
Unrealized profit		623,159
Unrealized loss		24,190
Foreign Central Banks And Government Securities [Member] | Due Within 1 Year [Member] | Other Foreign Financial Securities [Member]
Chilean central bank and government securities
Fair value		413,468
Unrealized profit		425,474
Unrealized loss		13,080
Foreign Central Banks And Government Securities [Member] | Due Within 1 Year [Member] | Foreign Financial Securities [Member]
Chilean central bank and government securities
Fair value		198,020
Unrealized profit		197,685
Unrealized loss		$ 11,110

Debt Instruments at Fair Valu_6

Debt Instruments at Fair Value Through Other Comprehensive Income (Details) - Schedule of changes in the fair value and the corresponding ECL - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Beginning balance	$ 4,010,272	$ 2,394,323
New assets purchased	14,708,776
Transfers to stage 1
Transfers to stage 2
Transfers to stage 3
Assets derecognized or matured (excluding write-off)	(11,440,253)	(5,694,456)
Changes due to modifications not derecognized	100,401	2,273,857
Write-off
Other adjustments	(216,654)	(657,908)
Ending balance	7,162,542	4,010,272
ECL [Member]
Beginning balance	456	258
New assets purchased	1,965	816
Transfers to stage 1
Transfers to stage 2
Transfers to stage 3
Assets derecognized or matured (excluding write-off)	(1,501)	(614)
Changes due to modifications not derecognized	219	67
Write-off
Other adjustments	(1)	(71)
Ending balance	1,138	456
Expected Credit Losses Stage1 [Member]
Beginning balance	4,010,272	2,394,323
New assets purchased	14,708,776
Transfers to stage 1
Transfers to stage 2
Transfers to stage 3
Assets derecognized or matured (excluding write-off)	(11,440,253)	(5,694,456)
Changes due to modifications not derecognized	100,401	394,648
Write-off
Other adjustments	(216,654)	(657,908)
Ending balance	7,162,542	4,010,272
Expected Credit Losses Stage1 [Member] | ECL [Member]
Beginning balance	456	258
New assets purchased	1,965	816
Transfers to stage 1
Transfers to stage 2
Transfers to stage 3
Assets derecognized or matured (excluding write-off)	(1,501)	(614)
Changes due to modifications not derecognized	219	67
Write-off
Other adjustments	(1)	(71)
Ending balance	1,138	456
Expected Credit Losses Stage2 [Member]
Beginning balance
New assets purchased
Transfers to stage 1
Transfers to stage 2
Transfers to stage 3
Assets derecognized or matured (excluding write-off)
Changes due to modifications not derecognized
Write-off
Other adjustments
Ending balance
Expected Credit Losses Stage2 [Member] | ECL [Member]
Beginning balance
New assets purchased
Transfers to stage 1
Transfers to stage 2
Transfers to stage 3
Assets derecognized or matured (excluding write-off)
Changes due to modifications not derecognized
Write-off
Other adjustments
Ending balance
Expected Credit Losses Stage3 [Member]
Beginning balance
New assets purchased
Transfers to stage 1
Transfers to stage 2
Transfers to stage 3
Assets derecognized or matured (excluding write-off)
Changes due to modifications not derecognized
Write-off
Other adjustments
Ending balance
Expected Credit Losses Stage3 [Member] | ECL [Member]
Beginning balance
New assets purchased
Transfers to stage 1
Transfers to stage 2
Transfers to stage 3
Assets derecognized or matured (excluding write-off)
Changes due to modifications not derecognized
Write-off
Other adjustments
Ending balance

Debt Instruments at Fair Valu_7

Debt Instruments at Fair Value Through Other Comprehensive Income (Details) - Schedule of gross profits and losses realized on the sale of available for sale investments - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of gross profits and losses realized on the sale of available for sale investments [Abstract]
Sale of available for sale investments generating realized profits	$ 3,696,791	$ 5,781,636	$ 3,505,266
Realized profits	82,925	63,828	8,802
Sale of available for sale investments generating realized losses	379,046	607,349	709,371
Realized losses	$ 2,246	$ 156	$ 6,004

Investments in Associates and_3

Investments in Associates and other Companies (Details) - Schedule of investments in associates and other companies - CLP ($) $ in Millions		12 Months Ended
		Dec. 31, 2020		Dec. 31, 2019	Dec. 31, 2018
Redbanc S.A. [Member]
Investments in Associates and other Companies (Details) - Schedule of investments in associates and other companies [Line Items]
Ownership interest	[1]				3343.00%
Carrying value	[1]				$ 2,822
Profit and loss			[1]
Transbank S.A. [Member]
Investments in Associates and other Companies (Details) - Schedule of investments in associates and other companies [Line Items]
Ownership interest	[1]				2500.00%
Carrying value	[1]				$ 17,651
Profit and loss			[1]
Centro de Compensacion Automatizado S.A. [Member]
Investments in Associates and other Companies (Details) - Schedule of investments in associates and other companies [Line Items]
Ownership interest		3333.00%		3333.00%	3333.00%
Carrying value		$ 2,788		$ 2,184	$ 1,894
Profit and loss		$ 603		$ 293	$ 305
Sociedad Interbancaria de Deposito de Valores S.A. [Member]
Investments in Associates and other Companies (Details) - Schedule of investments in associates and other companies [Line Items]
Ownership interest		2929.00%		2929.00%	2929.00%
Carrying value		$ 1,633		$ 1,485	$ 1,233
Profit and loss		$ 302		$ 252	$ 223
Camara de Compensacion de Alto Valor S.A. [Member]
Investments in Associates and other Companies (Details) - Schedule of investments in associates and other companies [Line Items]
Ownership interest		1500.00%		1500.00%	1500.00%
Carrying value		$ 971		$ 958	$ 945
Profit and loss		$ 28		$ 29	$ 58
Administrador Financiero del Transantiago S.A. [Member]
Investments in Associates and other Companies (Details) - Schedule of investments in associates and other companies [Line Items]
Ownership interest		2000.00%		2000.00%	2000.00%
Carrying value		$ 3,476		$ 3,986	$ 3,680
Profit and loss		$ 337		$ 390	$ 582
Sociedad Nexus S.A. [Member]
Investments in Associates and other Companies (Details) - Schedule of investments in associates and other companies [Line Items]
Ownership interest	[1]				1290.00%
Carrying value	[1]				$ 2,279
Profit and loss			[1]
Servicios de Infraestructura de Mercado OTC S.A. [Member]
Investments in Associates and other Companies (Details) - Schedule of investments in associates and other companies [Line Items]
Ownership interest		1207.00%		1207.00%	1248.00%
Carrying value		$ 1,528		$ 1,556	$ 1,491
Profit and loss		(24)		60	57
Subtotal
Investments in Associates and other Companies (Details) - Schedule of investments in associates and other companies [Line Items]
Carrying value		10,396		10,169	31,995
Profit and loss		1,246		1,024	1,225
Bladex [Member]
Investments in Associates and other Companies (Details) - Schedule of investments in associates and other companies [Line Items]
Carrying value
Profit and loss				13	19
Stock Exchanges [Member]
Investments in Associates and other Companies (Details) - Schedule of investments in associates and other companies [Line Items]
Carrying value
Profit and loss		142		109	148
Others [Member]
Investments in Associates and other Companies (Details) - Schedule of investments in associates and other companies [Line Items]
Carrying value				8	8
Profit and loss					(67)
Associated Companies [Member]
Investments in Associates and other Companies (Details) - Schedule of investments in associates and other companies [Line Items]
Carrying value		10,396		10,177	32,003
Profit and loss		$ 1,388		$ 1,146	$ 1,325
[1]	The Bank has entered into a process of selling the shares in Redbanc S.A., Transbank S.A. and Nexus SA, therefore, the treatment established in IFRS 5 “Non-current assets held for sale and discontinued operations” has been applied, on the participation of said companies, which is described in Note 1 v) and Note 38.

Investments in Associates and_4

Investments in Associates and other Companies (Details) - Schedule of fair value of these equity investments - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Investments in Associates and other Companies (Details) - Schedule of fair value of these equity investments [Line Items]
Investment value	$ 548	$ 482
Bladex [Member]
Investments in Associates and other Companies (Details) - Schedule of fair value of these equity investments [Line Items]
Investment value	310	328
Stock Exchanges [Member]
Investments in Associates and other Companies (Details) - Schedule of fair value of these equity investments [Line Items]
Investment value	228	154
Others [Member]
Investments in Associates and other Companies (Details) - Schedule of fair value of these equity investments [Line Items]
Investment value	$ 10

Investments in Associates and_5

Investments in Associates and other Companies (Details) - Schedule of financial information of associates - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Investments in Associates and other Companies (Details) - Schedule of financial information of associates [Line Items]
Assets	$ 88,453	$ 1,362,868	$ 1,059,806
Liabilities	36,891	1,201,475	919,068
Equity	46,781	142,750	119,143
Net income for the year	4,781	18,643	21,595
Redbanc S.A. [Member]
Investments in Associates and other Companies (Details) - Schedule of financial information of associates [Line Items]
Assets		23,413	20,825
Liabilities		14,106	12,469
Equity		8,441	7,505
Net income for the year		866	851
Transbank S.A. [Member]
Investments in Associates and other Companies (Details) - Schedule of financial information of associates [Line Items]
Assets		1,217,448	904,558
Liabilities		1,133,441	835,200
Equity		70,605	56,888
Net income for the year		13,402	12,470
Centro de Compensacion Automatizado S.A. [Member]
Investments in Associates and other Companies (Details) - Schedule of financial information of associates [Line Items]
Assets	11,134	8,550	7,073
Liabilities	2,953	1,998	1,480
Equity	6,371	5,671	4,677
Net income for the year	1,810	881	916
Sociedad Interbancaria de Deposito de Valores S.A. [Member]
Investments in Associates and other Companies (Details) - Schedule of financial information of associates [Line Items]
Assets	5,840	5,074	4,392
Liabilities	314	4	230
Equity	4,496	4,209	3,400
Net income for the year	1,030	861	762
Camara de Compensacion de Alto Valor S.A. [Member]
Investments in Associates and other Companies (Details) - Schedule of financial information of associates [Line Items]
Assets	7,158	7,372	6,728
Liabilities	722	986	622
Equity	6,246	6,193	5,722
Net income for the year	190	193	384
Administrador Financiero del Transantiago S.A. [Member]
Investments in Associates and other Companies (Details) - Schedule of financial information of associates [Line Items]
Assets	49,841	54,712	55,818
Liabilities	30,670	34,787	37,419
Equity	17,227	17,978	15,490
Net income for the year	1,944	1,947	2,909
Sociedad Nexus S.A. [Member]
Investments in Associates and other Companies (Details) - Schedule of financial information of associates [Line Items]
Assets		31,147	35,139
Liabilities		13,471	18,335
Equity		17,660	13,955
Net income for the year		16	2,849
Servicios de Infraestructura de Mercado OTC S.A. [Member]
Investments in Associates and other Companies (Details) - Schedule of financial information of associates [Line Items]
Assets	14,480	15,152	25,273
Liabilities	2,232	2,682	13,313
Equity	12,441	11,993	11,506
Net income for the year	$ (193)	$ 477	$ 454

Investments in Associates and_6

Investments in Associates and other Companies (Details) - Schedule of investments in other companies - CLP ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of investments in other companies [Abstract]
Opening balance as of January 1,		$ 10,177	$ 32,003	$ 27,585
Total		10,396	10,177	32,003
Acquisition of investments
Sale of investments		(20)
Participation in income		1,388	1,146	1,325
Dividends received		(508)	(130)	(38)
Other adjustments	[1]	$ (641)	$ (22,842)	$ 3,131
[1]	The Bank has entered into a process of selling the shares in Redbanc S.A., Transbank S.A. and Nexus SA, Thus, these investment have been reclassified to held for sale and presented under Other assets in the Consolidated Statement of Financial Position. As of Decemer 31, 2020, only Nexus has been sold.

Intangible Assets (Details) - S

Intangible Assets (Details) - Schedule of composition of intangible assets $ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020CLP ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019CLP ($)	Dec. 31, 2019USD ($)
Intangible Assets (Details) - Schedule of composition of intangible assets [Line Items]
Net balance at beginning (in Pesos)	$ 73,389	$ 73,389	$ 66,923
Net balance at ending		$ 82,537	$ 73,389	$ 73,389
Licences [member]
Intangible Assets (Details) - Schedule of composition of intangible assets [Line Items]
Average remaining useful life
Net balance at beginning (in Pesos)			$ 82
Net balance at ending
Software Development [Member]
Intangible Assets (Details) - Schedule of composition of intangible assets [Line Items]
Average remaining useful life	2 years	2 years	2 years	2 years
Net balance at beginning (in Pesos)	$ 73,389	$ 73,389	$ 66,841
Net balance at ending		82,537	$ 73,389	$ 73,389
Gross Carrying Amount [Member]
Intangible Assets (Details) - Schedule of composition of intangible assets [Line Items]
Gross balance		284,534		250,002
Gross Carrying Amount [Member] | Licences [member]
Intangible Assets (Details) - Schedule of composition of intangible assets [Line Items]
Gross balance		35,997		35,997
Gross Carrying Amount [Member] | Software Development [Member]
Intangible Assets (Details) - Schedule of composition of intangible assets [Line Items]
Gross balance		248,537		214,005
Accumulated Depreciation and Amortisation [Member]
Intangible Assets (Details) - Schedule of composition of intangible assets [Line Items]
Accumulated amortization		(201,997)		(176,613)
Accumulated Depreciation and Amortisation [Member] | Licences [member]
Intangible Assets (Details) - Schedule of composition of intangible assets [Line Items]
Accumulated amortization		(35,997)		(35,997)
Accumulated Depreciation and Amortisation [Member] | Software Development [Member]
Intangible Assets (Details) - Schedule of composition of intangible assets [Line Items]
Accumulated amortization		$ (166,000)		$ (140,616)

Intangible Assets (Details) -_2

Intangible Assets (Details) - Schedule of changes in the value of intangible assets - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Intangible Assets (Details) - Schedule of changes in the value of intangible assets [Line Items]
Gross, beginning balance	$ 250,002	$ 218,415
Gross, ending balance	284,534	250,002
Accumulated amortization, beginning balance	(176,613)	(151,492)
Accumulated amortization ,ending balance	201,997	(176,613)
Acquisitions	35,170	32,860
Disposals and impairment	(638)	(1,227)
Other		(46)
Year’s amortization	(25,384)	(26,348)
Other changes		1,227
Licenses [Member]
Intangible Assets (Details) - Schedule of changes in the value of intangible assets [Line Items]
Gross, beginning balance	35,997	37,224
Gross, ending balance	35,997	35,997
Accumulated amortization, beginning balance	(35,997)	(37,142)
Accumulated amortization ,ending balance	(35,997)	(35,997)
Acquisitions
Disposals and impairment		(1,227)
Other
Year’s amortization		(82)
Other changes		1,227
Software development [Member]
Intangible Assets (Details) - Schedule of changes in the value of intangible assets [Line Items]
Gross, beginning balance	214,005	181,191
Gross, ending balance	248,537	214,005
Accumulated amortization, beginning balance	(140,616)	(114,350)
Accumulated amortization ,ending balance	(166,000)	(140,616)
Acquisitions	35,170	32,860
Disposals and impairment	(638)
Other		(46)
Year’s amortization	(25,384)	(26,266)
Other changes

Fixed Assets and Right of Use_3

Fixed Assets and Right of Use Assets and Lease Liability (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019CLP ($)
Disclosure of quantitative information about leases for lessee [abstract]
Due to impairment	$ 1,013

Fixed Assets and Right of Use_4

Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of property, plant, and equipment balances - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of property, plant, and equipment balances [Line Items]
Net opening balance	$ 250,761	$ 253,586
Total	240,854	250,761
Land and buildings [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of property, plant, and equipment balances [Line Items]
Net opening balance	173,061	174,758
Total	167,694	173,061
Equipment [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of property, plant, and equipment balances [Line Items]
Net opening balance	55,494	56,865
Total	52,448	55,494
Other [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of property, plant, and equipment balances [Line Items]
Net opening balance	22,206	21,963
Total	20,712	22,206
Gross balance [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of property, plant, and equipment balances [Line Items]
Total	626,742	591,763
Gross balance [Member] | Land and buildings [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of property, plant, and equipment balances [Line Items]
Total	308,499	302,405
Gross balance [Member] | Equipment [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of property, plant, and equipment balances [Line Items]
Total	243,084	219,600
Gross balance [Member] | Other [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of property, plant, and equipment balances [Line Items]
Total	75,159	69,758
Accumulated depreciation [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of property, plant, and equipment balances [Line Items]
Total	(385,888)	(341,002)
Accumulated depreciation [Member] | Land and buildings [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of property, plant, and equipment balances [Line Items]
Total	(140,805)	(129,344)
Accumulated depreciation [Member] | Equipment [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of property, plant, and equipment balances [Line Items]
Total	(190,636)	(164,106)
Accumulated depreciation [Member] | Other [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of property, plant, and equipment balances [Line Items]
Total	$ (54,447)	$ (47,552)

Fixed Assets and Right of Use_5

Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of changes in value of property, plant, and equipment - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020		Dec. 31, 2019
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of changes in value of property, plant, and equipment [Line Items]
Balances beginning	$ 591,763		$ 544,052
Balances at ending	626,742		591,763
Additions	50,523		57,390
Disposals	(15,544)		(8,666)
Impairment due to damage		[1]	(1,013)
Other
Land and buildings [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of changes in value of property, plant, and equipment [Line Items]
Balances beginning	302,405		289,568
Balances at ending	308,499		302,405
Additions	17,790		16,486
Disposals	(11,696)		(2,636)
Impairment due to damage		[1]	(1,013)
Other
Equipment [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of changes in value of property, plant, and equipment [Line Items]
Balances beginning	219,600		192,328
Balances at ending	243,084		219,600
Additions	25,233		33,302
Disposals	(1,749)		(6,030)
Impairment due to damage		[1]
Other
Other [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of changes in value of property, plant, and equipment [Line Items]
Balances beginning	69,758		62,156
Balances at ending	75,159		69,758
Additions	7,500		7,602
Disposals	(2,099)
Impairment due to damage		[1]
Other
[1]	Banco Santander-Chile has recognized in its consolidated financial statements as of December 31, 2019 impairment of $1,013 million, due to the effects of social unrest in the country. See Note 32.

Fixed Assets and Right of Use_6

Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of accumulated depreciation - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of accumulated depreciation [Line Items]
Balances beginning	$ (341,002)	$ (298,472)
Depreciation charges in the period	(56,311)	(52,855)
Sales and disposals in the period	16,241	10,815
Other	(4,816)	(490)
Balances at ending	(385,888)	(341,002)
Land and buildings [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of accumulated depreciation [Line Items]
Balances beginning	(129,344)	(114,810)
Depreciation charges in the period	(19,026)	(16,018)
Sales and disposals in the period	12,381	9,490
Other	(4,816)
Balances at ending	(140,805)	(129,344)
Equipment [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of accumulated depreciation [Line Items]
Balances beginning	(164,106)	(135,463)
Depreciation charges in the period	(28,370)	(29,968)
Sales and disposals in the period	1,840	1,325
Other
Balances at ending	(190,636)	(164,106)
Other [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of accumulated depreciation [Line Items]
Balances beginning	(47,552)	(40,193)
Depreciation charges in the period	(8,915)	(6,869)
Sales and disposals in the period	2,020
Other		(490)
Balances at ending	$ (54,447)	$ (47,552)

Fixed Assets and Right of Use_7

Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of composition of the right of use assets - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of composition of the right of use assets [Line Items]
Opening balance	$ 157,572	$ 154,284
Total	147,997	157,572
Land and buildings [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of composition of the right of use assets [Line Items]
Opening balance	157,572	154,284
Total	147,997	157,572
Other [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of composition of the right of use assets [Line Items]
Opening balance
Total
Gross balance [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of composition of the right of use assets [Line Items]
Total	197,573	182,910
Gross balance [Member] | Land and buildings [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of composition of the right of use assets [Line Items]
Total	197,573	182,910
Gross balance [Member] | Other [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of composition of the right of use assets [Line Items]
Total
Accumulated depreciation [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of composition of the right of use assets [Line Items]
Total	(49,576)	(25,338)
Accumulated depreciation [Member] | Land and buildings [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of composition of the right of use assets [Line Items]
Total	(49,576)	(25,338)
Accumulated depreciation [Member] | Other [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of composition of the right of use assets [Line Items]
Total

Fixed Assets and Right of Use_8

Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of right of use assets under lease - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of right of use assets under lease [Line Items]
Balances beginning	$ 182,910	$ 154,284
Balances at ending	197,573	182,910
Additions	24,136	48,008
Disposals	(9,473)	(17,669)
Impairment		(1,713)
Other
Land and buildings [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of right of use assets under lease [Line Items]
Balances beginning	182,910	154,284
Balances at ending	197,573	182,910
Additions	24,136	48,008
Disposals	(9,473)	(17,669)
Impairment		(1,713)
Other
Other [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of right of use assets under lease [Line Items]
Balances beginning
Balances at ending
Additions
Disposals
Impairment
Other

Fixed Assets and Right of Use_9

Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of accumulated amortization - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of accumulated amortization [Line Items]
Balances beginning	$ (25,338)
Balances at ending	(49,576)	(25,338)
Amortization for the period	(27,731)	(26,889)
Sales and disposals during the period	3,496	1,551
Transfers
Others	(3)
Land and buildings [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of accumulated amortization [Line Items]
Balances beginning	(25,338)
Balances at ending	(49,576)	(25,338)
Amortization for the period	(27,731)	(26,889)
Sales and disposals during the period	3,496	1,551
Transfers
Others	(3)
Other [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of accumulated amortization [Line Items]
Balances beginning
Balances at ending
Amortization for the period
Sales and disposals during the period
Transfers
Others

Fixed Assets and Right of Us_10

Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of composition of lease liability balances - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of composition of lease liability balances [Line Items]
Total	$ 149,585	$ 158,494
Lease liabilities [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of composition of lease liability balances [Line Items]
Total	$ 149,585	$ 158,494

Fixed Assets and Right of Us_11

Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of operating lease commitment - Operating Lease Liability [Member] $ in Millions	12 Months Ended
	Dec. 31, 2018CLP ($)
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of operating lease commitment [Line Items]
Beginning balance	$ 173,602
Discounted using the lessee´s incremental borrowing rate of at the date of initial application	14,726
Lease liabilities recognized due to IFRS 16 implementation	139,558
Ending balance	$ 154,284

Fixed Assets and Right of Us_12

Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of assets for the right of use leased assets and lease liability - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Schedule of assets for the right of use leased assets and lease liability [Abstract]
Depreciation	$ 27,731	$ 26,889
Interests	2,651	2,965
Short term lease	1,625	4,177
Total	$ 32,007	$ 34,031

Fixed Assets and Right of Us_13

Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of maturity level of the lease liability - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of maturity level of the lease liability [Line Items]
Total	$ 149,585	$ 158,494
Due Within 1 Year [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of maturity level of the lease liability [Line Items]
Total	25,526	26,061
Due After 1 Year But Within 2 Years [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of maturity level of the lease liability [Line Items]
Total	23,461	24,311
Due After 2 Years But Within 3 years [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of maturity level of the lease liability [Line Items]
Total	21,472	21,667
Due After 3 Years But Within 4 Years [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of maturity level of the lease liability [Line Items]
Total	19,343	19,411
Due After 4 Years But Within 5 Years [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of maturity level of the lease liability [Line Items]
Total	16,336	16,982
Due After 5 Years [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of maturity level of the lease liability [Line Items]
Total	$ 43,447	$ 50,062

Fixed Assets and Right of Us_14

Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of future minimum lease cash inflows under non-cancellable operating leases - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of future minimum lease cash inflows under non-cancellable operating leases [Line Items]
Total	$ 4,861	$ 4,174
Due Within 1 Year [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of future minimum lease cash inflows under non-cancellable operating leases [Line Items]
Total	740	603
Due After 1 Year But Within 2 Years [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of future minimum lease cash inflows under non-cancellable operating leases [Line Items]
Total	1,015	598
Due After 2 Years But Within 3 years [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of future minimum lease cash inflows under non-cancellable operating leases [Line Items]
Total	736	500
Due After 3 Years But Within 4 Years [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of future minimum lease cash inflows under non-cancellable operating leases [Line Items]
Total	639	498
Due After 4 Years But Within 5 Years [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of future minimum lease cash inflows under non-cancellable operating leases [Line Items]
Total	448	412
Due After 5 Years [Member]
Fixed Assets and Right of Use Assets and Lease Liability (Details) - Schedule of future minimum lease cash inflows under non-cancellable operating leases [Line Items]
Total	$ 1,283	$ 1,563

Current and Deferred Taxes (Det

Current and Deferred Taxes (Details) - Schedule of current taxes - CLP ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Summary of current tax liabilities (assets)
Current tax (assets)		$ (11,648,000)
Current tax liabilities	12,977,000
Total tax payable (recoverable)	12,977,000	(11,648,000)
(Assets) liabilities current taxes detail (net)
Income tax, tax rate	174,205,000	153,424,000	$ 196,527,000
Minus:
Provisional monthly payments	(157,648)	(159,943,000)
Credit for training expenses	(2,137)	(2,145,000)
Grant credits	(1,360)	(1,149,000)
Other	(83,000)	(1,835,000)
Total tax payable	$ 12,977,000	$ (11,648,000)

Current and Deferred Taxes (D_2

Current and Deferred Taxes (Details) - Schedule of effect on income - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income tax expense
Current tax	$ 174,205	$ 153,424	$ 196,527
Credits (debits) for deferred taxes
Origination and reversal of temporary differences	(28,465)	37,432	(25,517)
Valuation provision			(56)
Subtotals	145,740	190,856	170,954
Tax for rejected expenses (Article No21)	1,354	927	1,110
Other	(4,561)	(16,709)	(4,920)
Net charges for income tax expense	$ 142,533	$ 175,074	$ 167,144

Current and Deferred Taxes (D_3

Current and Deferred Taxes (Details) - Schedule of effective tax rate reconciliation - CLP ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of effective tax rate reconciliation [Abstract]
Tax calculated over profit before tax		27.00%	27.00%	27.00%
Tax calculated over profit before tax		$ 187,721	$ 214,566	$ 207,046
Price level restatement for tax purposes	[1]	(6.15%)	(6.33%)	(5.15%)
Price level restatement for tax purposes	[1]	$ (42,730)	$ (50,297)	$ (39,494)
Single penalty tax (rejected expenses)		0.19%	0.12%	0.14%
Single penalty tax (rejected expenses)		$ 1,354	$ 927	$ 1,110
Other		(0.55%)	1.24%	(0.20%)
Other		$ (3,812)	$ 9,878	$ (1,518)
Effective tax rates and expenses for income tax		20.50%	22.03%	21.79%
Effective tax rates and expenses for income tax		$ 142,533	$ 175,074	$ 167,144
[1]	Mainly corresponds to the permanent differences originated from the Own Tax Monetary Correction and the effect of the bonds received to article 104 of LIR.

Current and Deferred Taxes (D_4

Current and Deferred Taxes (Details) - Schedule of effect of deferred taxes on comprehensive income - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets
Debt instruments at FVOCI	$ 14,907	$ 8,074
Cash flow hedges	36,927	10,918
Total deferred tax assets recognized through other comprehensive income	51,834	18,992
Deferred tax liabilities
Debt instruments at FVOCI	(42,371)	(15,830)
Cash flow hedges
Total deferred tax liabilities recognized through other comprehensive income	(42,371)	(15,830)
Net deferred tax balances in equity	9,463	3,162
Deferred taxes in equity attributable to shareholders of the Bank	9,776	3,444
Deferred tax in equity attributable to non-controlling interests	$ (313)	$ (282)

Current and Deferred Taxes (D_5

Current and Deferred Taxes (Details) - Schedule of effect of deferred taxes on income - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets
Interests and adjustments	$ 8,166	$ 9,531
Extraordinary charge-offs	17,705	15,325
Assets received in lieu of payment	1,425	1,214
Exchange rate adjustments	89
Property, plant and equipment valuation		6,381
Allowance for loan losses	238,670	188,956
Provision for expenses	101,321	89,098
Leased assets	89,458	116,226
Subsidiaries tax losses	7,394	5,416
Right of use assets	428	249
Total deferred tax assets	464,656	432,396
Deferred tax liabilities
Valuation of investments	(19,967)	(17,518)
Depreciation	(7,394)
Prepaid expenses	(16,691)	(20,347)
Valuation provision	(5,775)	(6,058)
Derivatives	(37,265)	(36,512)
Exchange rate adjustments		(2,817)
Other	(30)	(75)
Total deferred tax liabilities	$ (87,122)	$ (83,327)

Current and Deferred Taxes (D_6

Current and Deferred Taxes (Details) - Schedule of deferred tax assets and liabilities - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets
Recognized through other comprehensive income	$ 51,834	$ 18,992
Recognized through profit or loss	464,656	432,396
Total deferred tax assets	516,490	451,388
Deferred tax liabilities
Recognized through other comprehensive income	(42,371)	(15,830)
Recognized through profit or loss	(87,122)	(83,327)
Total deferred tax liabilities	$ (129,493)	$ (99,157)

Other Assets (Details)

Other Assets (Details) - USD ($) $ in Millions	1 Months Ended
	May 31, 2020	Oct. 31, 2020
Disclosure of other assets [text block] [Abstract]
Financing proposal amount	$ 2,200
Disbursement of financing amount		$ 1,150
Disbursement percentage		50.00%

Other Assets (Details) - Schedu

Other Assets (Details) - Schedule of other assets - CLP ($) $ in Thousands		Dec. 31, 2020	Dec. 31, 2019
Schedule of other assets [Abstract]
Assets for leasing	[1]	$ 62,967,000	$ 67,139,000
Assets received or awarded in lieu of payment
Assets received in lieu of payment		15,213,000	18,755,000
Assets awarded at judicial sale		17,430,000	22,177,000
Provision on assets received in lieu of payment or awarded		(1,196,000)	(2,042,000)
Subtotal		31,447,000	38,890,000
Other assets
Guarantee deposits (margin accounts)	[2]	608,359,000	314,616,000
Non-current assets classified as held for sale	[3]	22,036	22,394,000
Gold investments		765,000	680,000
VAT credit		27,519,000	22,663,000
Income tax recoverable			1,787,000
Prepaid expenses	[4]	387,668,000	432,030,000
Assets recovered from leasing for sale		3,191,000	3,575,000
Valuation adjustments by macro hedge	[5]	327,938,000	210,867,000
Pension plan assets		673,000	670,000
Accounts and notes receivable		100,504,000	147,108,000
Notes receivable through brokerage and simultaneous transactions		41,960,000	43,354,000
Other receivable assets		33,567,000	44,262,000
Other assets	[6]	98,780,000	89,111,000
Subtotal		1,652,960,000	1,333,117,000
Total		$ 1,747,374,000	$ 1,439,146,000
[1]	Assets available to be granted under the financial leasing agreements.
[2]	Guarantee deposits (margin accounts) correspond to collateral associated with derivative financial contracts to mitigate the counterparty credit risk and are mainly established in cash. These guarantees operate when mark to market of derivative financial instruments exceed the levels of threshold agreed in the contracts, which could result in the Bank delivering or receiving collateral.
[3]	Corresponds to the interests in Redbanc S.A., Transbank S.A. and Nexus S.A., which have been reclassified as non-current assets classified as held for sale in accordance with IFRS 5 “Non-current assets held for sale and discontinued operations “, for additional information see Note 1 v) and Note 38.
[4]	Under this item, the Bank has recorded prepaid expense related to the Santander LATAM Pass program, which is consumed on a monthly basis in accordance with the client use of Bank's transactional products and therefore the Bank assigned the respective LATAM Pass miles. In May 2020, LATAM Airlines Group S.A began a reorganization process under Chapter 11, with an aim to was continue operating. LATAM has publicly stated its intention to honor all current and future tickets, as well as travel vouchers, miles and frequent flyer programs, which has been ratified by the bankruptcy court of New York (in charge of chapter 11). In addition, LATAM has formalized two tranches of the DIP (Debtor in Possession) financing proposal for a total of USD 2,200 million, obtaining all resources necessary to continue operating during the crisis. On October, the company made its first disbursement for US$1,150 million from de DIP financing, which represents 50% of the amount available.
[5]	Net assets and liabilities fair value valuation subject to macro hedges. See Note 7
[6]	Other assets mainly include settlement of derivatives and other financial transactions.

Time Deposits and Other Time _3

Time Deposits and Other Time Liabilities (Details) - Schedule of time deposits and other time liabilities $ in Millions, $ in Millions	Dec. 31, 2020CLP ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019CLP ($)	Dec. 31, 2019USD ($)
Deposits and other demand liabilities
Checking accounts		$ 11,342,648		$ 8,093,108
Other deposits and demand accounts		1,583,183		741,103
Other demand liabilities		1,635,062		1,463,221
Subtotal		14,560,893		10,297,432
Time deposits and other time liabilities
Time deposits		10,421,872		13,064,932
Time savings account		153,330		123,787
Other time liabilities		6,589		4,098
Subtotal		10,581,791		13,192,817
Total	$ 14,560,893	$ 25,142,684	$ 10,297,432	$ 23,490,249

Interbank Borrowings (Details)

Interbank Borrowings (Details) - Chilean Central Bank [Member] $ in Billions	12 Months Ended
	Dec. 31, 2020USD ($)
Interbank Borrowings (Details) [Line Items]
Line of credit (in Dollars)	$ 24
MPR interest rate percentage	0.50%
Borrowing percentage	3.00%
Additional borrowing percentage	12.00%
Loan provided description	Loans provided by this line of credit may have maturities of up to 4 years and must be secured by government bonds, corporate bonds or highly rated large commercial loans as collateral. Loans provided under the second line of credit, the LCL, are unsecured and may have maturities of up to 2 years.

Interbank Borrowings (Details)

Interbank Borrowings (Details) - Schedule of Interbank borrowings - CLP ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Loans From Financial Institutions And The Central Bank Of Chile [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	$ 4,959,260,000
Loans From Domestic Financial Institutions [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	217,102,000	286,603,000
Loans From Foreign Financial Institutions [Member] | Banco Santander S.A., Madrid [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	534,496
Loans From Foreign Financial Institutions [Member] | The Bank of Nova Scotia [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	171,024	134,819,000
Loans From Foreign Financial Institutions [Member] | The Bank of New York Mellon [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	106,860	119,616,000
Loans From Foreign Financial Institutions [Member] | Bank Of America N.A. [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	90,711	355,051,000
Loans From Foreign Financial Institutions [Member] | Zurcher Kantonalbank [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	71,304
Loans From Foreign Financial Institutions [Member] | Wells Fargo Bank N.A. [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	71,259	231,823,000
Loans From Foreign Financial Institutions [Member] | State Bank of India [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	36,013	28,231,000
Loans From Foreign Financial Institutions [Member] | Sumitomo Mitsui Banking Corporation [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	35,628	179,415,000
Loans From Foreign Financial Institutions [Member] | Wachovia Bank N,A, [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	10,254
Loans From Foreign Financial Institutions [Member] | Banco Santander Hong Kong [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	7,960	3,697,000
Loans From Foreign Financial Institutions [Member] | Bank of Tokio Mitsubishi [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	2,055	156,000
Loans From Foreign Financial Institutions [Member] | Banco Santander Brasil S,A, [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	1,694	7,873,000
Loans From Foreign Financial Institutions [Member] | Standard Chartered Bank [Member] [Default Label]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	1,691	153,373,000
Loans From Foreign Financial Institutions [Member] | Jp Morgan Chase, New York [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	1,571
Loans From Foreign Financial Institutions [Member] | Standard Chartered Bank [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	1,516	3,613,000
Loans From Foreign Financial Institutions [Member] | Caja Madrid - Caja de Ahorros [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	862,000
Loans From Foreign Financial Institutions [Member] | The Hongkong and Shanghai Bank [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	801,000
Loans From Foreign Financial Institutions [Member] | Korea Exchange Bank [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	760,000	761,000
Loans From Foreign Financial Institutions [Member] | Loans From Foreign Financial Institutions [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	755,000	898,000
Loans From Foreign Financial Institutions [Member] | Hong Kong and Shanghai Banking [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	598,000	684,000
Loans From Foreign Financial Institutions [Member] | Kookmin Bank [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	376,000	185,000
Loans From Foreign Financial Institutions [Member] | Banco Do Brasil [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	265,000
Loans From Foreign Financial Institutions [Member] | U.S. Bank[Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	248,000
Loans From Foreign Financial Institutions [Member] | China Merchants Bank [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	231,000	597,000
Loans From Foreign Financial Institutions [Member] | Taiwan Cooperative Bank [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	227,000	131,000
Loans From Foreign Financial Institutions [Member] | Bank of China [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	223,000	952,000
Loans From Foreign Financial Institutions [Member] | Hua Nan Commercial Bank Ltd, [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	200,000	102,000
Loans From Foreign Financial Institutions [Member] | Banque Bruxelles Lambert S,A, [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	174,000
Loans From Foreign Financial Institutions [Member] | Banca Monte dei Paschi di Siena [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	163,000	58,000
Loans From Foreign Financial Institutions [Member] | Unicredito Italiano Spa [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	161,000	583,000
Loans From Foreign Financial Institutions [Member] | Keb Hana Bank [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	156,000	119,000
Loans From Foreign Financial Institutions [Member] | Banco Santander Central Hispano [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	141,000	848,000
Loans From Foreign Financial Institutions [Member] | Bper Banca S.P.A.[Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	137,000
Loans From Foreign Financial Institutions [Member] | Hdfc Bank Limited [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	131,000	72,000
Loans From Foreign Financial Institutions [Member] | Bank Leumi Le Israel B.M.[Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	127,000
Loans From Foreign Financial Institutions [Member] | Bank of Baroda [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	124,000	9,000
Loans From Foreign Financial Institutions [Member] | Fortis Bank S,A,/N,V, Brussels [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	108,000	50,000
Loans From Foreign Financial Institutions [Member] | Banca Commerciale Italiana [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	88,000	50,000
Loans From Foreign Financial Institutions [Member] | Caixa Destalvis I Pensions de Barcelona [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	87,000	63,000
Loans From Foreign Financial Institutions [Member] | Banco Bpm Spa [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	84,000	66,000
Loans From Foreign Financial Institutions [Member] | Rabobank, Hong Kong Branch [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	79,000	477,000
Loans From Foreign Financial Institutions [Member] | Banco de la Republica Oriental [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	74,000	23,000
Loans From Foreign Financial Institutions [Member] | Kbc Bank Nv [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	68,000	406,000
Loans From Foreign Financial Institutions [Member] | Canara Bank [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	61,000	66,000
Loans From Foreign Financial Institutions [Member] | Habib Bank Limited [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	61,000	38,000
Loans From Foreign Financial Institutions [Member] | First Union National Bank [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	60,000
Loans From Foreign Financial Institutions [Member] | Caixabank S,A, [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	58,000	166,000
Loans From Foreign Financial Institutions [Member] | Icici Bank Limited [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	52,000
Loans From Foreign Financial Institutions [Member] | Kotak Mahindra Bank Limited [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	49,000
Loans From Foreign Financial Institutions [Member] | Citibank N.A. [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	46,000	269,841,000
Loans From Foreign Financial Institutions [Member] | Arab Bank Plc [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	41,000
Loans From Foreign Financial Institutions [Member] | China Construction Bank [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	38,000
Loans From Foreign Financial Institutions [Member] | Credit Agricole Italia S.P.A. [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	33,000
Loans From Foreign Financial Institutions [Member] | Bankinter S,A, [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	31,000
Loans From Foreign Financial Institutions [Member] | Banco de La Nacion Argentina [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	30,000
Loans From Foreign Financial Institutions [Member] | Bank of East Asia, Limited [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	29,000	82,000
Loans From Foreign Financial Institutions [Member] | Banco Popular Espanol, S.A. [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	29,000
Loans From Foreign Financial Institutions [Member] | Banco Interamericano de Finanz [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	20,000
Loans From Foreign Financial Institutions [Member] | Agricultural Bank of China [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	18,000	152,000
Loans From Foreign Financial Institutions [Member] | Woori Bank [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	15,000	155,000
Loans From Foreign Financial Institutions [Member] | Denizbank A.S. , Istanbul [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	15,000
Loans From Foreign Financial Institutions [Member] | United Bank of India [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	14,000	113,000
Loans From Foreign Financial Institutions [Member] | Banco Popolare [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	14,000
Loans From Foreign Financial Institutions [Member] | Subtotal [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	1,152,199,000	1,495,414,000
Loans From Foreign Financial Institutions [Member] | Habib Metropolitan Bank Limite [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	13,000
Loans From Foreign Financial Institutions [Member] | E, Sun Commercial Bank Ltd, [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	11,000	159,000
Loans From Foreign Financial Institutions [Member] | Nova Ljubljanska Banka D.D. [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	7,000
Loans From Foreign Financial Institutions [Member] | Indian Overseas Bank [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	6,000
Loans From Foreign Financial Institutions [Member] | Shanghai Commercial and Saving [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	1,000	6,000
Loans From Foreign Financial Institutions [Member] | Mizuho Bank Ltd. NY. [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		269,404,000
Loans From Foreign Financial Institutions [Member] | Barclays Bank Plc London [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		98,803,000
Loans From Foreign Financial Institutions [Member] | Corporacion Andina De Fomento [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		75,097,000
Loans From Foreign Financial Institutions [Member] | Zürcher Kantonalbank [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		75,002,000
Loans From Foreign Financial Institutions [Member] | The Toronto Dominion Bank [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		71,191,000
Loans From Foreign Financial Institutions [Member] | HSBC Bank Plc [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		69,786,000
Loans From Foreign Financial Institutions [Member] | Bank of Montreal [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		56,123,000
Loans From Foreign Financial Institutions [Member] | Banco Latinoamericano De Comercio [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		18,731,000
Loans From Foreign Financial Institutions [Member] | Banco Bilbao Vizcaya Argentaria [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		571,000
Loans From Foreign Financial Institutions [Member] | Bbva Bancomer, S,A, [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		553,000
Loans From Foreign Financial Institutions [Member] | Bank of Communications [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		385,000
Loans From Foreign Financial Institutions [Member] | Bank of The West [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		261,000
Loans From Foreign Financial Institutions [Member] | Danske Bank A/S [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		224,000
Loans From Foreign Financial Institutions [Member] | Deutsche Bank A,G, [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		193,000
Loans From Foreign Financial Institutions [Member] | Bank of Taiwan [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		135,000
Loans From Foreign Financial Institutions [Member] | Shinhan Bank [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		133,000
Loans From Foreign Financial Institutions [Member] | Banca Di Credito Cooperativo [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		112,000
Loans From Foreign Financial Institutions [Member] | Joint Stock Commercial Bank Fo, [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		110,000
Loans From Foreign Financial Institutions [Member] | Banca Nazionale Del Lavoro S,P [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		106,000
Loans From Foreign Financial Institutions [Member] | Industrial Bank of Korea [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		96,000
Loans From Foreign Financial Institutions [Member] | Banco Bradesco S,A, [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		84,000
Loans From Foreign Financial Institutions [Member] | Bank of Ningbo [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		83,000
Loans From Foreign Financial Institutions [Member] | China Everbright Bank [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		70,000
Loans From Foreign Financial Institutions [Member] | Cassa Di Risparmio Di Parma E [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		69,000
Loans From Foreign Financial Institutions [Member] | Mizuho Corporate Bank Ltd, [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		67,000
Loans From Foreign Financial Institutions [Member] | Banco Comercial Portugues [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		63,000
Loans From Foreign Financial Institutions [Member] | Shanghai Pudong Development Ba [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		59,000
Loans From Foreign Financial Institutions [Member] | Kasikornbank Public Company Li [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		33,000
Loans From Foreign Financial Institutions [Member] | Banco Rio De La Plata S,A, [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		24,000
Loans From Foreign Financial Institutions [Member] | Australia And New Zealand Bank [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		23,000
Loans From Foreign Financial Institutions [Member] | Citic Industrial Bank [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		19,000
Loans From Foreign Financial Institutions [Member] | Shangai Pudong Development Ban [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		14,000
Loans From Foreign Financial Institutions [Member] | Banco Caixa Geral [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		10,000
Loans From Foreign Financial Institutions [Member] | Hsbc Bank USA [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings		2,000
Loans from foreign financial institutions, continuacion [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	6,328,599,000	2,519,818,000
Loans from foreign financial institutions, continuacion [Member] | Subtotal [Member]
Interbank Borrowings (Details) - Schedule of Interbank borrowings [Line Items]
Interbank borrowings	$ 38,000	$ 737,801,000

Interbank Borrowings (Details_2

Interbank Borrowings (Details) - Schedule of loans from chilean central bank - Loans From Chilean Central Bank [Member] - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Interbank Borrowings (Details) - Schedule of loans from chilean central bank [Line Items]
Interbank borrowings	$ 4,959,260
Due Within 1 Year [Member]
Interbank Borrowings (Details) - Schedule of loans from chilean central bank [Line Items]
Interbank borrowings
Due within 1 and 2 year [Member]
Interbank Borrowings (Details) - Schedule of loans from chilean central bank [Line Items]
Interbank borrowings	1,104,759
Due within 2 and 3 year [Member]
Interbank Borrowings (Details) - Schedule of loans from chilean central bank [Line Items]
Interbank borrowings
Due within 3 and 4 year [Member]
Interbank Borrowings (Details) - Schedule of loans from chilean central bank [Line Items]
Interbank borrowings	3,854,501
Due after 5 years [Member]
Interbank Borrowings (Details) - Schedule of loans from chilean central bank [Line Items]
Interbank borrowings

Interbank Borrowings (Details_3

Interbank Borrowings (Details) - Schedule of loans from financial institutions - Loans From Domestic Financial Institutions [Member] - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Interbank Borrowings (Details) - Schedule of loans from financial institutions [Line Items]
Interbank borrowings	$ 217,102	$ 286,603
Due within 1 year [Member]
Interbank Borrowings (Details) - Schedule of loans from financial institutions [Line Items]
Interbank borrowings	217,102	158,855
Due within 1 and 2 year [Member]
Interbank Borrowings (Details) - Schedule of loans from financial institutions [Line Items]
Interbank borrowings		117,344
Due After 2 Years But Within 3 years [Member]
Interbank Borrowings (Details) - Schedule of loans from financial institutions [Line Items]
Interbank borrowings		8,167
Due After 3 Years But Within 4 Years [Member]
Interbank Borrowings (Details) - Schedule of loans from financial institutions [Line Items]
Interbank borrowings		2,237
Due within 3 and 4 year [Member]
Interbank Borrowings (Details) - Schedule of loans from financial institutions [Line Items]
Interbank borrowings

Interbank Borrowings (Details_4

Interbank Borrowings (Details) - Schedule of foreign obligations - Loans From Foreign Financial Institutions [Member] - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Due within 1 year [Member]
Interbank Borrowings (Details) - Schedule of foreign obligations [Line Items]
Interbank borrowings	$ 1,116,570	$ 1,970,790
Due within 1 and 2 year [Member]
Interbank Borrowings (Details) - Schedule of foreign obligations [Line Items]
Interbank borrowings	35,667	225,025
Due within 2 and 3 year [Member]
Interbank Borrowings (Details) - Schedule of foreign obligations [Line Items]
Interbank borrowings		37,400
Due within 3 and 4 year [Member]
Interbank Borrowings (Details) - Schedule of foreign obligations [Line Items]
Interbank borrowings
Due After 5 Years [Member]
Interbank Borrowings (Details) - Schedule of foreign obligations [Line Items]
Interbank borrowings
Interbank borrowings	$ 1,152,237	$ 2,233,215

Issued Debt Instruments and O_3

Issued Debt Instruments and Other Financial Liabilities (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Issued Debt Instruments and Other Financial Liabilities (Details) [Line Items]
Percentage of yearly interest yield	5.20%	5.39%
Bottom of range [member]
Issued Debt Instruments and Other Financial Liabilities (Details) [Line Items]
Range of maturities period	5 years
Top of range [member]
Issued Debt Instruments and Other Financial Liabilities (Details) [Line Items]
Range of maturities period	20 years

Issued Debt Instruments and O_4

Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of composition of issued debt instruments and other financial liabilities - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Other financial liabilities
Subtotals	$ 184,318	$ 226,358
Issued debt instruments
Subtotals	8,204,177	9,500,723
Issued debt instruments and other financial liabilities	8,388,495	9,727,081
Obligations To Public Sector [Member]
Other financial liabilities
Subtotals		9,198
Other Domestic Obligations [Member]
Other financial liabilities
Subtotals	175,344	204,705
Foreign Obligations [Member]
Other financial liabilities
Subtotals	8,974	12,455
Mortgage Finance Bonds [Member]
Issued debt instruments
Subtotals	12,314	18,502
Senior Bonds [Member]
Issued debt instruments
Subtotals	6,749,989	8,574,213
Mortgage Bonds [Member]
Issued debt instruments
Subtotals	84,335	89,924
Subordinated Bonds [Member]
Issued debt instruments
Subtotals	$ 1,357,539	$ 818,084

Issued Debt Instruments and O_5

Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of debts classified - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of debts classified [Line Items]
Issued debt instruments current	$ 1,135,005	$ 2,089,352
Issued debt instruments non current	7,069,172	7,411,371
Issued debt instruments	8,204,177	9,500,723
Other financial liabilities current	184,028	226,033
Other financial liabilities non current	290	325
Other financial liabilities	184,318	226,358
Issued debt instruments and other financial liabilities current	1,319,033	2,315,385
Issued debt instruments and other financial liabilities non current	7,069,462	7,411,696
Issued debt instruments and other financial liabilities	8,388,495	9,727,081
Mortgage Finance Bonds [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of debts classified [Line Items]
Issued debt instruments current	4,982	6,013
Issued debt instruments non current	7,332	12,489
Issued debt instruments	12,314	18,502
Senior Bonds [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of debts classified [Line Items]
Issued debt instruments current	1,124,558	2,078,202
Issued debt instruments non current	5,625,431	6,496,011
Issued debt instruments	6,749,989	8,574,213
Mortgage Bonds [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of debts classified [Line Items]
Issued debt instruments current	5,465	5,137
Issued debt instruments non current	78,870	84,787
Issued debt instruments	84,335	89,924
Subordinated Bonds [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of debts classified [Line Items]
Issued debt instruments current
Issued debt instruments non current	1,357,539	818,084
Issued debt instruments	$ 1,357,539	$ 818,084

Issued Debt Instruments and O_6

Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of mortgage finance bonds - Mortgage Finance Bonds [Member] - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of mortgage finance bonds [Line Items]
Issued debt instruments	$ 12,314	$ 18,502
Due Within 1 Year [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of mortgage finance bonds [Line Items]
Issued debt instruments	4,982	6,013
Due After 1 Year But Within 2 Years [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of mortgage finance bonds [Line Items]
Issued debt instruments	3,816	4,944
Due After 2 Years But Within 3 years [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of mortgage finance bonds [Line Items]
Issued debt instruments	2,375	3,928
Due After 3 Years But Within 4 Years [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of mortgage finance bonds [Line Items]
Issued debt instruments	979	2,442
Due After 4 Years But Within 5 Years [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of mortgage finance bonds [Line Items]
Issued debt instruments	$ 162	1,005
Due After 5 Years [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of mortgage finance bonds [Line Items]
Issued debt instruments		$ 170

Issued Debt Instruments and O_7

Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of senior bonds by currency - Senior Bonds [Member] - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of senior bonds by currency [Line Items]
Issued debt instruments	$ 6,749,989	$ 8,574,213
UF [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of senior bonds by currency [Line Items]
Issued debt instruments	4,017,708	4,814,604
USD [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of senior bonds by currency [Line Items]
Issued debt instruments	1,263,714	1,649,238
CHF [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of senior bonds by currency [Line Items]
Issued debt instruments	466,738	499,485
CLP [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of senior bonds by currency [Line Items]
Issued debt instruments	639,489	1,242,633
AUD [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of senior bonds by currency [Line Items]
Issued debt instruments	125,781	124,748
JPY [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of senior bonds by currency [Line Items]
Issued debt instruments	68,093	77,797
EUR [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of senior bonds by currency [Line Items]
Issued debt instruments	$ 168,466	$ 165,708

Issued Debt Instruments and O_8

Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds - Senior Bonds [Member] - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
W1 [Member] | UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount	$ 1,996,000
Issuance rate	1.55% annual
Series approval date	Feb. 4, 2018
Series maximum amount	$ 2,000,000
Maturity date	Jun. 1, 2025
W1 [Member] | Minimum [Member] | UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Term	5
W1 [Member] | Maximum [Member] | UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Term	3
UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount	$ 1,996,000
Series maximum amount	2,000,000
US Bonds [Member] | USD
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount	$ 742,500,000
Term	5
Issuance rate	2,70% annual
Series approval date	Jan. 7, 2020
Series maximum amount	$ 750,000,000
Maturity date	Jan. 7, 2025
USD
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount	$ 742,500,000
Series maximum amount	750,000,000
T7 [Member] | UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 5,000,000
Term		4
Issuance rate		2,50%
Series approval date		Feb. 1, 2016
Series maximum amount		$ 5,000,000
Maturity date		Feb. 1, 2023
T8 [Member] | UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 5,678,000
Issuance rate		2,55%
Series approval date		Feb. 1, 2016
Series maximum amount		$ 5,678,000
Maturity date		Aug. 1, 2023
T8 [Member] | Minimum [Member] | UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Term		4
T8 [Member] | Maximum [Member] | UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Term		6
T14 [Member] | UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 9,000,000
Term		8
Issuance rate		2,80%
Series approval date		Feb. 1, 2016
Series maximum amount		$ 18,000,000
Maturity date		Feb. 1, 2027
T6 [Member] | UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 5,000,000
Term		10
Issuance rate		1,70%
Series approval date		Nov. 1, 2018
Series maximum amount		$ 5,000,000
Maturity date		May 1, 2029
T10 [Member] | UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 5,000,000
Issuance rate		2,60%
Series approval date		Feb. 1, 2016
Series maximum amount		$ 5,000,000
Maturity date		Aug. 1, 2024
T10 [Member] | Minimum [Member] | UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Term		5
T10 [Member] | Maximum [Member] | UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Term		4
UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 29,678,000
Series maximum amount		38,678,000
U9 [Member] | CLP
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 75,000,000,000
Issuance rate		ICP + 0,80% yearly
Series approval date		Nov. 1, 2018
Series maximum amount		$ 75,000,000,000
Maturity date		Nov. 19, 2021
U9 [Member] | Minimum [Member] | CLP
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Term		2
U9 [Member] | Maximum [Member] | CLP
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Term		8
P5 [Member] | CLP
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 75,000,000,000
Issuance rate		5,3% yearly
Series approval date		Mar. 1, 2015
Series maximum amount		$ 150,000,000,000
Maturity date		Mar. 1, 2022
P5 [Member] | Minimum [Member] | CLP
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Term		2
P5 [Member] | Maximum [Member] | CLP
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Term		7
CLP
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 150,000,000,000
Series maximum amount		225,000,000,000
Senior Bonds EUR [Member] | EUR
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 30,000,000
Term		7
Issuance rate		1,10%
Series approval date		Feb. 1, 2019
Series maximum amount		$ 40,000,000
Maturity date		Feb. 7, 2026
SantanderBondsEUR1Member | EUR
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 25,000,000
Term		5
Issuance rate		1,25%
Series approval date		Nov. 26, 2019
Series maximum amount		$ 25,000,000
Maturity date		Nov. 26, 2034
EUR
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 55,000,000
Series maximum amount		65,000,000
Senior Bonds Related To AUD [Member] | AUD
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 22,000,000
Term		15
Issuance rate		3,66% yearly
Series approval date		May 20, 2019
Series maximum amount		$ 22,000,000
Maturity date		May 20, 2034
Senior Bonds Related To AUD1 [Member] | AUD
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 20,000,000
Term		5
Issuance rate		1,13% yearly
Series approval date		Jul. 11, 2019
Series maximum amount		$ 20,000,000
Maturity date		Jul. 11, 2024
Senior Bonds Related To AUD2 [Member] | AUD
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 28,000,000
Term		5
Issuance rate		1,13% yearly
Series approval date		Jul. 17, 2019
Series maximum amount		$ 28,000,000
Maturity date		Jul. 17, 2024
Senior Bonds Related To AUD3 [Member] | AUD
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 15,000,000
Term		5
Issuance rate		1,13% yearly
Series approval date		Jul. 17, 2019
Series maximum amount		$ 15,000,000
Maturity date		Jul. 17, 2024
Senior Bonds Related To AUD4 [Member] | AUD
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 75,000,000
Term		20
Issuance rate		3,05% yearly
Series approval date		Aug. 30, 2019
Series maximum amount		$ 75,000,000
Maturity date		Feb. 28, 2039
Senior Bonds Related To AUD5 [Member] | AUD
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 12,000,000
Term		5
Issuance rate		3,16% yearly
Series approval date		Nov. 12, 2019
Series maximum amount		$ 12,000,000
Maturity date		Nov. 20, 2034
Senior Bonds Related To AUD6 [Member] | AUD
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 13,000,000
Term		5
Issuance rate		2,91% yearly
Series approval date		Nov. 21, 2019
Series maximum amount		$ 13,000,000
Maturity date		Nov. 27, 2034
AUD
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 185,000,000
Series maximum amount		185,000,000
Santander Bonds CHF [Member] | CHF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 150,000,000
Issuance rate		0,38% yearly
Series approval date		Mar. 12, 2019
Series maximum amount		$ 150,000,000
Maturity date		Sep. 27, 2024
Santander Bonds CHF [Member] | Minimum [Member] | CHF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Term		5
Santander Bonds CHF [Member] | Maximum [Member] | CHF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Term		6
Santander Bonds CHF1 [Member] | CHF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 100,000,000
Term		10
Issuance rate		0,14% yearly
Series approval date		Aug. 29, 2019
Series maximum amount		$ 100,000,000
Maturity date		Aug. 29, 2029
CHF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount		$ 250,000,000
Series maximum amount		$ 250,000,000
Bonos USD [Member] | USD
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount	$ 200,000,000
Term	10
Issuance rate	3.79%
Series approval date	Jan. 21, 2020
Series maximum amount	$ 200,000,000
Maturity date	Jan. 21, 2030
USD
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount	$ 200,000,000
Series maximum amount	200,000,000
USTDH20914 [Member] | UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount	$ 3,000,000
Issuance rate	3.00%
Series approval date	Apr. 7, 2020
Series maximum amount	$ 3,000,000
Maturity date	Sep. 1, 2034
USTDH20914 [Member] | Minimum [Member] | UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Term	14
USTDH20914 [Member] | Maximum [Member] | UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Term	5
USTDH30914 [Member] | UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount	$ 3,000,000
Issuance rate	3.15%
Series approval date	Apr. 7, 2020
Series maximum amount	$ 3,000,000
Maturity date	Sep. 1, 2039
USTDH30914 [Member] | Minimum [Member] | UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Term	19
USTDH30914 [Member] | Maximum [Member] | UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Term	5
USTDW20320 [Member] | UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount	$ 5,000,000
Issuance rate	3.50%
Series approval date	Jun. 19, 2020
Series maximum amount	$ 5,000,000
Maturity date	Sep. 1, 2035
USTDW20320 [Member] | Minimum [Member] | UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Term	15
USTDW20320 [Member] | Maximum [Member] | UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Term	3
UF
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of placement of senior bonds [Line Items]
Amount	$ 11,000,000
Series maximum amount	$ 11,000,000

Issued Debt Instruments and O_9

Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase $ in Thousands	12 Months Ended
	Dec. 31, 2020CLP ($)
Senior Bonds [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-02-2020
Type	Senior
Currency	UF
Amount	$ 357,000,000
Senior Bonds 1 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-03-2020
Type	Senior
Currency	UF
Amount	$ 300,000,000
Senior Bonds 2 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-09-2020
Type	Senior
Currency	UF
Amount	$ 60,000,000
Senior Bonds 3 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-09-2020
Type	Senior
Currency	UF
Amount	$ 27,000,000
Senior Bonds 4 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-13-2020
Type	Senior
Currency	CLP
Amount	$ 50,000,000,000
Senior Bonds 5 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-14-2020
Type	Senior
Currency	UF
Amount	$ 109,000,000
Senior Bonds 6 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-14-2020
Type	Senior
Currency	CLP
Amount	$ 9,820,000,000,000
Senior Bonds 7 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-14-2020
Type	Senior
Currency	UF
Amount	$ 131,000,000
Senior Bonds 8 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-14-2020
Type	Senior
Currency	UF
Amount	$ 322,000,000
Senior Bonds 9 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-15-2020
Type	Senior
Currency	USD
Amount	$ 2,490,000,000
Senior Bonds 10 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-15-2020
Type	Senior
Currency	UF
Amount	$ 47,000,000
Senior Bonds 11 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-16-2020
Type	Senior
Currency	CLP
Amount	$ 400,000,000,000
Senior Bonds 12 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-16-2020
Type	Senior
Currency	UF
Amount	$ 1,000,000
Senior Bonds 13 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-17-2020
Type	Senior
Currency	UF
Amount	$ 28,000,000
Senior Bonds 14 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-20-2020
Type	Senior
Currency	UF
Amount	$ 74,000,000
Senior Bonds 15 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-21-2020
Type	Senior
Currency	UF
Amount	$ 171,000,000
Senior Bonds 16 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-21-2020
Type	Senior
Currency	UF
Amount	$ 181,000,000
Senior Bonds 17 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-21-2020
Type	Senior
Currency	CLP
Amount	$ 330,000,000,000
Senior Bonds 18 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-22-2020
Type	Senior
Currency	CLP
Amount	$ 11,430,000,000,000
Senior Bonds 19 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-24-2020
Type	Senior
Currency	UF
Amount	$ 2,000,000
Senior Bonds 20 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-29-2020
Type	Senior
Currency	UF
Amount	$ 1,000,000
Senior Bonds 21 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-29-2020
Type	Senior
Currency	CLP
Amount	$ 120,000,000,000
Senior Bonds 22 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-30-2020
Type	Senior
Currency	CLP
Amount	$ 10,000,000,000
Senior Bonds 23 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	01-31-2020
Type	Senior
Currency	UF
Amount	$ 40,000,000
Senior Bonds 24 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-06-2020
Type	Senior
Currency	CLP
Amount	$ 6,000,000,000,000
Senior Bonds 25 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-07-2020
Type	Senior
Currency	CLP
Amount	$ 1,180,000,000,000
Senior Bonds 26 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-11-2020
Type	Senior
Currency	CLP
Amount	$ 7,430,000,000,000
Senior Bonds 27 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-12-2020
Type	Senior
Currency	CLP
Amount	$ 2,520,000,000,000
Senior Bonds 28 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-13-2020
Type	Senior
Currency	CLP
Amount	$ 10,000,000,000,000
Senior Bonds 29 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-17-2020
Type	Senior
Currency	UF
Amount	$ 2,000,000
Senior Bonds 30 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-17-2020
Type	Senior
Currency	UF
Amount	$ 15,000,000
Senior Bonds 31 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-18-2020
Type	Senior
Currency	UF
Amount	$ 50,000,000
Senior Bonds 32 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-18-2020
Type	Senior
Currency	UF
Amount	$ 4,000,000
Senior Bonds 33 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-20-2020
Type	Senior
Currency	UF
Amount	$ 350,000,000
Senior Bonds 34 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-20-2020
Type	Senior
Currency	UF
Amount	$ 115,000,000
Senior Bonds 35 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-21-2020
Type	Senior
Currency	UF
Amount	$ 57,000,000
Senior Bonds 36 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-21-2020
Type	Senior
Currency	UF
Amount	$ 24,000,000
Senior Bonds 37 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-24-2020
Type	Senior
Currency	UF
Amount	$ 250,000,000
Senior Bonds 38 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-24-2020
Type	Senior
Currency	UF
Amount	$ 10,000,000
Senior Bonds 39 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-26-2020
Type	Senior
Currency	UF
Amount	$ 169,000,000
Senior Bonds 40 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-26-2020
Type	Senior
Currency	UF
Amount	$ 1,000,000
Senior Bonds 41 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-27-2020
Type	Senior
Currency	UF
Amount	$ 180,000,000
Senior Bonds 42 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-27-2020
Type	Senior
Currency	UF
Amount	$ 11,000,000
Senior Bonds 43 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-27-2020
Type	Senior
Currency	CLP
Senior Bonds 44 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-02-2020
Type	Senior
Currency	UF
Amount	$ 1,000
Senior Bonds 45 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-05-2020
Type	Senior
Currency	UF
Amount	$ 2,000
Senior Bonds 46 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-09-2020
Type	Senior
Currency	UF
Amount	$ 261,000
Senior Bonds 47 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-09-2020
Type	Senior
Currency	UF
Amount	$ 150,000
Senior Bonds 48 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-11-2020
Type	Senior
Currency	UF
Amount	$ 2,000
Senior Bonds 49 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-17-2020
Type	Senior
Currency	UF
Amount	$ 850,000
Senior Bonds 50 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-18-2020
Type	Senior
Currency	UF
Amount	$ 150,000
Senior Bonds 51 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-19-2020
Type	Senior
Currency	USD
Senior Bonds 52 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-23-2020
Type	Senior
Currency	UF
Amount	$ 95,000
Senior Bonds 53 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-23-2020
Type	Senior
Currency	USD
Senior Bonds 54 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-24-2020
Type	Senior
Currency	CLP
Senior Bonds 55 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-30-2020
Type	Senior
Currency	UF
Amount	$ 62,000
Senior Bonds 56 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-31-2020
Type	Senior
Currency	UF
Amount	$ 360,000
Senior Bonds 57 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-31-2020
Type	Senior
Currency	UF
Amount	$ 5,000
Senior Bonds 58 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	04-01-2020
Type	Senior
Currency	CLP
Senior Bonds 59 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	04-02-2020
Type	Senior
Currency	UF
Senior Bonds 60 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	04-02-2020
Type	Senior
Currency	CLP
Senior Bonds 61 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	04-03-2020
Type	Senior
Currency	CLP
Senior Bonds 62 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	04-03-2020
Type	Senior
Currency	UF
Amount	$ 27,000
Senior Bonds 63 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	04-06-2020
Type	Senior
Currency	CLP
Senior Bonds 64 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	04-06-2020
Type	Senior
Currency	UF
Amount	$ 157,000
Senior Bonds 65 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	04-06-2020
Type	Senior
Currency	USD
Senior Bonds 66 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	04-07-2020
Type	Senior
Currency	CLP
Senior Bonds 67 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	04-07-2020
Type	Senior
Currency	UF
Senior Bonds 68 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	04-07-2020
Type	Senior
Currency	USD
Senior Bonds 69 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	04-08-2020
Type	Senior
Currency	CLP
Senior Bonds 70 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	04-13-2020
Type	Senior
Currency	CLP
Senior Bonds 71 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	04-14-2020
Type	Senior
Currency	CLP
Senior Bonds 72 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	04-17-2020
Type	Senior
Currency	CLP
Senior Bonds 74 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	05-05-2020
Type	Senior
Currency	USD
Senior Bonds 75 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	05-14-2020
Type	Senior
Currency	USD
Senior Bonds 76 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	06-02-2020
Type	Senior
Currency	CLP
Senior Bonds 77 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	06-03-2020
Type	Senior
Currency	UF
Amount	$ 100,000
Senior Bonds 78 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	06-03-2020
Type	Senior
Currency	CLP
Senior Bonds 79 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	06-05-2020
Type	Senior
Currency	USD
Senior Bonds 80 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	06-08-2020
Type	Senior
Currency	CLP
Senior Bonds 81 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	06-12-2020
Type	Senior
Currency	CLP
Senior Bonds 82 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	06-16-2020
Type	Senior
Currency	CHF
Senior Bonds 83 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	06-17-2020
Type	Senior
Currency	CHF
Senior Bonds 84 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	06-19-2020
Type	Senior
Currency	CLP
Senior Bonds 85 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	06-22-2020
Type	Senior
Currency	CLP
Senior Bonds 86 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	06-26-2020
Type	Senior
Currency	CLP
Senior Bonds 87 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	07-02-2020
Type	Senior
Currency	CLP
Senior Bonds 88 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	07-10-2020
Type	Senior
Currency	CHF
Senior Bonds 89 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	07-10-2020
Type	Senior
Currency	CLP
Senior Bonds 90 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	07-15-2020
Type	Senior
Currency	CLP
Senior Bonds 91 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	07-17-2020
Type	Senior
Currency	UF
Amount	$ 1,000
Senior Bonds 92 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	07-17-2020
Type	Senior
Currency	CLP
Senior Bonds 93 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	08-13-2020
Type	Senior
Currency	UF
Amount	$ 345,000
Senior Bonds 94 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	08-14-2020
Type	Senior
Currency	USD
Senior Bonds 95 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	08-21-2020
Type	Senior
Currency	UF
Amount	$ 100,000
Senior Bonds 96 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	08-21-2020
Type	Senior
Currency	UF
Amount	$ 77,000
Senior Bonds 97 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	08-24-2020
Type	Senior
Currency	UF
Amount	$ 11,000
Senior Bonds 98 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	08-25-2020
Type	Senior
Currency	UF
Amount	$ 14,000
Senior Bonds 99 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	09-09-2020
Type	Senior
Currency	UF
Amount	$ 24,000
Senior Bonds 100 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	09-09-2020
Type	Senior
Currency	UF
Amount	$ 70,000
Senior Bonds 101 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	09-09-2020
Type	Senior
Currency	UF
Amount	$ 45,000
Senior Bonds 102 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	09-10-2020
Type	Senior
Currency	UF
Amount	$ 210,000
Senior Bonds 103 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	09-23-2020
Type	Senior
Currency	USD
Senior Bonds 104 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	09-28-2020
Type	Senior
Currency	UF
Amount	$ 50,000
Senior Bonds 105 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	09-29-2020
Type	Senior
Currency	UF
Amount	$ 1,000
Senior Bonds 106 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	09-30-2020
Type	Senior
Currency	UF
Amount	$ 43,000
Senior Bonds 107 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	10-01-2020
Type	Senior
Currency	UF
Amount	$ 4,000,000
Senior Bonds 108 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	10-06-2020
Type	Senior
Currency	UF
Amount	$ 1,000,000
Senior Bonds 109 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	10-06-2020
Type	Senior
Currency	UF
Amount	$ 1,000,000
Senior Bonds 110 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	10-06-2020
Type	Senior
Currency	CLP
Amount	$ 50,000,000,000
Senior Bonds 111 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	10-06-2020
Type	Senior
Currency	UF
Amount	$ 1,000,000
Senior Bonds 112 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	10-06-2020
Type	Senior
Currency	UF
Amount	$ 1,000,000
Senior Bonds 113 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	10-15-2020
Type	Senior
Currency	UF
Amount	$ 2,000,000
Senior Bonds 114 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	10-20-2020
Type	Senior
Currency	CHF
Amount	$ 2,000,000,000
Senior Bonds 115 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	10-01-2020
Type	Senior
Currency	USD
Amount	$ 5,153,000,000
Senior Bonds 116 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	10-19-2020
Type	Senior
Currency	USD
Amount	$ 20,000,000,000
Senior Bonds 117 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	11-16-2020
Type	Senior
Currency	USD
Amount	$ 1,000,000,000
Senior Bonds 118 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	11-18-2020
Type	Senior
Currency	USD
Amount	$ 10,000,000,000
Senior Bonds 119 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	11-15-2020
Type	Senior
Currency	USD
Amount	$ 477,510,000,000
Senior Bonds 120 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-12-2019
Type	Senior
Currency	CLP
Amount	$ 10,000,000,000,000
Senior Bonds 121 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-14-2019
Type	Senior
Currency	CLP
Amount	$ 30,000,000,000,000
Senior Bonds 122 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-19-2019
Type	Senior
Currency	CLP
Amount	$ 4,200,000,000,000
Senior Bonds 123 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-22-2019
Type	Senior
Currency	CLP
Amount	$ 14,240,000,000,000
Senior Bonds 124 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-22-2019
Type	Senior
Currency	CLP
Amount	$ 30,000,000,000
Senior Bonds 125 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	02-22-2019
Type	Senior
Currency	CLP
Amount	$ 10,000,000,000
Senior Bonds 126 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-01-2019
Type	Senior
Currency	CLP
Amount	$ 11,800,000,000,000
Senior Bonds 127 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-04-2019
Type	Senior
Currency	CLP
Amount	$ 40,080,000,000,000
Senior Bonds 128 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-05-2019
Type	Senior
Currency	CLP
Amount	$ 20,000,000,000,000
Senior Bonds 129 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-15-2019
Type	Senior
Currency	UF
Amount	$ 156,000,000
Senior Bonds 130 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-19-2019
Type	Senior
Currency	UF
Amount	$ 418,000,000
Senior Bonds 131 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-20-2019
Type	Senior
Currency	CLP
Amount	$ 6,710,000,000,000
Senior Bonds 132 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-20-2019
Type	Senior
Currency	UF
Amount	$ 154,000,000
Senior Bonds 133 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-21-2019
Type	Senior
Currency	UF
Amount	$ 100,000,000
Senior Bonds 134 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-25-2019
Type	Senior
Currency	UF
Amount	$ 100,000,000
Senior Bonds 135 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	03-26-2019
Type	Senior
Currency	UF
Amount	$ 90,000,000
Senior Bonds 136 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	04-08-2019
Type	Senior
Currency	CLP
Amount	$ 3,950,000,000,000
Senior Bonds 137 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	04-10-2019
Type	Senior
Currency	UF
Amount	$ 409,000,000
Senior Bonds 138 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	04-16-2019
Type	Senior
Currency	UF
Amount	$ 55,000,000
Senior Bonds 139 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	04-17-2019
Type	Senior
Currency	CLP
Amount	$ 130,000,000,000
Senior Bonds 140 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	04-18-2019
Type	Senior
Currency	CLP
Amount	$ 330,000,000,000
Senior Bonds 141 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	05-16-2019
Type	Senior
Currency	CLP
Amount	$ 14,880,000,000,000
Senior Bonds 142 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	05-16-2019
Type	Senior
Currency	UF
Amount	$ 9,000,000
Senior Bonds 143 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	06-13-2019
Type	Senior
Currency	UF
Amount	$ 1,000,000
Senior Bonds 144 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	10-01-2019
Type	Senior
Currency	CLP
Amount	$ 10,960,000,000,000
Senior Bonds 145 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	10-02-2019
Type	Senior
Currency	CLP
Amount	$ 100,000,000,000
Senior Bonds 146 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	10-04-2019
Type	Senior
Currency	CLP
Amount	$ 60,000,000,000
Senior Bonds 147 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	11-05-2019
Type	Senior
Currency	CLP
Amount	$ 15,220,000,000,000
Senior Bonds 148 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	11-07-2019
Type	Senior
Currency	CLP
Amount	$ 3,620,000,000,000
Senior Bonds 149 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	11-13-2019
Type	Senior
Currency	CLP
Amount	$ 5,320,000,000,000
Senior Bonds 150 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	11-14-2019
Type	Senior
Currency	UF
Amount	$ 2,977,000,000
Senior Bonds 151 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	11-28-2019
Type	Senior
Currency	UF
Amount	$ 340,000,000
Senior Bonds 152 [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of partial repurchase [Line Items]
Issuance date	12-02-2019
Type	Senior
Currency	UF
Amount	$ 105,000,000

Issued Debt Instruments and _10

Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of senior bonds - Senior Bonds [Member] - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of senior bonds [Line Items]
Issued debt instruments	$ 6,749,989	$ 8,574,213
Due within 1 year [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of senior bonds [Line Items]
Issued debt instruments	1,124,558	2,078,202
Due after 1 year but within 2 years [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of senior bonds [Line Items]
Issued debt instruments	1,047,241	1,147,825
Due after 2 year but within 3 years [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of senior bonds [Line Items]
Issued debt instruments	742,081	1,221,393
Due after 3 year but within 4 years [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of senior bonds [Line Items]
Issued debt instruments	1,228,524	742,238
Due after 4 year but within 5 years [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of senior bonds [Line Items]
Issued debt instruments	1,250,897	1,278,746
Due after 5 years [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of senior bonds [Line Items]
Issued debt instruments	$ 1,356,688	$ 2,105,809

Issued Debt Instruments and _11

Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of mortgage bonds per currency - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Mortgage bonds in UF [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of mortgage bonds per currency [Line Items]
Issued debt instruments	$ 84,335	$ 89,924
Total mortgage bonds [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of mortgage bonds per currency [Line Items]
Issued debt instruments	84,335	89,924
Subordinated bonds denominated in USD [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of mortgage bonds per currency [Line Items]
Issued debt instruments	202,634
Subordinated bonds denominated in UF [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of mortgage bonds per currency [Line Items]
Issued debt instruments	1,154,905	818,084
Total subordinated bonds [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of mortgage bonds per currency [Line Items]
Issued debt instruments	$ 1,357,539	$ 818,084

Issued Debt Instruments and _12

Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of mortgage bond - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Mortgage Bonds [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of mortgage bond [Line Items]
Issued debt instruments	$ 84,335	$ 89,924
Subordinated Bonds [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of mortgage bond [Line Items]
Issued debt instruments	1,357,539	818,084
Due within 1 year [Member] | Mortgage Bonds [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of mortgage bond [Line Items]
Issued debt instruments	5,465	5,137
Due within 1 year [Member] | Subordinated Bonds [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of mortgage bond [Line Items]
Issued debt instruments
Due after 1 year but within 2 years [Member] | Mortgage Bonds [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of mortgage bond [Line Items]
Issued debt instruments	8,773	8,248
Due after 1 year but within 2 years [Member] | Subordinated Bonds [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of mortgage bond [Line Items]
Issued debt instruments
Due after 2 year but within 3 years [Member] | Mortgage Bonds [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of mortgage bond [Line Items]
Issued debt instruments	9,056	8,514
Due after 2 year but within 3 years [Member] | Subordinated Bonds [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of mortgage bond [Line Items]
Issued debt instruments
Due after 3 year but within 4 years [Member] | Mortgage Bonds [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of mortgage bond [Line Items]
Issued debt instruments	9,348	8,788
Due after 3 year but within 4 years [Member] | Subordinated Bonds [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of mortgage bond [Line Items]
Issued debt instruments
Due after 4 year but within 5 years [Member] | Mortgage Bonds [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of mortgage bond [Line Items]
Issued debt instruments	9,649	9,072
Due after 4 year but within 5 years [Member] | Subordinated Bonds [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of mortgage bond [Line Items]
Issued debt instruments
Due after 5 years [Member] | Mortgage Bonds [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of mortgage bond [Line Items]
Issued debt instruments	42,044	50,165
Due after 5 years [Member] | Subordinated Bonds [Member]
Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of maturities of mortgage bond [Line Items]
Issued debt instruments	$ 1,357,539	$ 818,084

Issued Debt Instruments and _13

Issued Debt Instruments and Other Financial Liabilities (Details) - Schedule of other financial liabilities - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Non-current portion:
Non-current portion subtotal	$ 290	$ 325
Current portion:
Amounts due to credit card operators	134,790	151,984
Acceptance of letters of credit	1,460	5,709
Other long-term financial obligations, short-term portion	47,778	68,347
Current portion subtotal	184,028	226,040
Total other financial liabilities	184,318	226,358
Due After 1 Year But Within 2 Years [Member]
Non-current portion:
Non-current portion subtotal	42	41
Due After 2 Years But Within 3 years [Member]
Non-current portion:
Non-current portion subtotal	47	44
Due After 3 Years But Within 4 Years [Member]
Non-current portion:
Non-current portion subtotal	50	48
Due After 4 Years But Within 5 Years [Member]
Non-current portion:
Non-current portion subtotal	55	53
Due After 5 Years [Member]
Non-current portion:
Non-current portion subtotal	$ 96	$ 132

Maturity of Financial Assets _3

Maturity of Financial Assets and Liabilities (Details) - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Maturity Of Assets And Liabilities Explanatory [Abstract]
Receivables at amortised cost, amount of allowance	$ 1,036,793	$ 896,095
Receivables at fvoci, amount of allowance	$ 1,354	$ 101

Maturity of Financial Assets _4

Maturity of Financial Assets and Liabilities (Details) - Schedule of assets and liabilities maturities - CLP ($) $ in Millions	Dec. 31, 2020		Dec. 31, 2019
Financial liabilities
Total financial liabilities	$ 51,998,449		$ 47,096,211
Cash And Deposits In Banks [Member]
Financial liabilities
Total financial liabilities	14,560,893
Cash items in process of being cleared [Member]
Financial liabilities
Total financial liabilities	361,631		198,248
Obligations under repurchase agreements [Member]
Financial liabilities
Total financial liabilities	969,808		380,055
Time deposits and other time liabilities [Member]
Financial liabilities
Total financial liabilities	10,581,791		13,192,817
Financial derivative contracts [Member]
Financial liabilities
Total financial liabilities	9,018,660		7,390,654
Interbank Borrowings [Member]
Financial liabilities
Total financial liabilities	6,328,599		2,519,818
Issued debt instruments [Member]
Financial liabilities
Total financial liabilities	8,204,177		9,500,723
Lease liabilities [member]
Financial liabilities
Total financial liabilities	184,318		158,494
Other financial liabilities [Member]
Financial liabilities
Total financial liabilities	149,585		226,358
Guarantees received (margin accounts) [Member]
Financial liabilities
Total financial liabilities	624,205		994,714
Financial Liabilitie [Member]
Financial liabilities
Total financial liabilities	50,983,667		44,859,313
Deposits and other demand liabilities [Member]
Financial liabilities
Total financial liabilities			10,297,432
Cash And Deposits In Banks [Member]
Financial assets
Total financial assets	2,803,288		3,554,520
Cash Items In Process Of Collection [Member]
Financial assets
Total financial assets	452,963		355,062
Financial assets held for trading [Member]
Financial assets
Total financial assets	133,718		270,204
Investments Under Resale Agreements [Member]
Financial assets
Total financial assets
Financial derivative contracts [Member]
Financial assets
Total financial assets	9,032,085		8,148,608
Loans And Accounts Receivable At Amortized Cost [Member]
Financial assets
Total financial assets	34,339,893	[1]	32,671,515	[2]
Loans and account receivable at FVOCI [Member]
Financial assets
Total financial assets	70,685	[3]	66,166	[4]
Debt instruments at FVOCI [Member]
Financial assets
Total financial assets	7,162,542		4,010,272
Equity instruments at FVOCI [Member]
Financial assets
Total financial assets	548		482
Guarantee deposits (margin accounts)
Financial assets
Total financial assets	608,359		314,616
Financial Asset [Member]
Financial assets
Total financial assets	54,604,081		49,391,445
Demand [Member] | Cash And Deposits In Banks [Member]
Financial liabilities
Total financial liabilities	14,560,893
Demand [Member] | Cash items in process of being cleared [Member]
Financial liabilities
Total financial liabilities	361,631		198,248
Demand [Member] | Obligations under repurchase agreements [Member]
Financial liabilities
Total financial liabilities
Demand [Member] | Time deposits and other time liabilities [Member]
Financial liabilities
Total financial liabilities	159,918		142,273
Demand [Member] | Financial derivative contracts [Member]
Financial liabilities
Total financial liabilities
Demand [Member] | Interbank Borrowings [Member]
Financial liabilities
Total financial liabilities	16,832		94
Demand [Member] | Issued debt instruments [Member]
Financial liabilities
Total financial liabilities
Demand [Member] | Lease liabilities [member]
Financial liabilities
Total financial liabilities	144,478
Demand [Member] | Other financial liabilities [Member]
Financial liabilities
Total financial liabilities			161,021
Demand [Member] | Guarantees received (margin accounts) [Member]
Financial liabilities
Total financial liabilities	624,205		994,714
Demand [Member] | Financial Liabilitie [Member]
Financial liabilities
Total financial liabilities	15,867,957		11,793,782
Demand [Member] | Deposits and other demand liabilities [Member]
Financial liabilities
Total financial liabilities			10,297,432
Demand [Member] | Cash And Deposits In Banks [Member]
Financial assets
Total financial assets	2,803,288		3,554,520
Demand [Member] | Cash Items In Process Of Collection [Member]
Financial assets
Total financial assets	452,963		355,062
Demand [Member] | Financial assets held for trading [Member]
Financial assets
Total financial assets
Demand [Member] | Investments Under Resale Agreements [Member]
Financial assets
Total financial assets
Demand [Member] | Financial derivative contracts [Member]
Financial assets
Total financial assets
Demand [Member] | Loans And Accounts Receivable At Amortized Cost [Member]
Financial assets
Total financial assets	170,214	[1]	296,461	[2]
Demand [Member] | Loans and account receivable at FVOCI [Member]
Financial assets
Total financial assets		[3]		[4]
Demand [Member] | Debt instruments at FVOCI [Member]
Financial assets
Total financial assets
Demand [Member] | Equity instruments at FVOCI [Member]
Financial assets
Total financial assets
Demand [Member] | Guarantee deposits (margin accounts)
Financial assets
Total financial assets	608,359		314,616
Demand [Member] | Financial Asset [Member]
Financial assets
Total financial assets	4,034,824		4,520,659
Up to 1 month [Member] | Cash And Deposits In Banks [Member]
Financial liabilities
Total financial liabilities
Up to 1 month [Member] | Cash items in process of being cleared [Member]
Financial liabilities
Total financial liabilities
Up to 1 month [Member] | Obligations under repurchase agreements [Member]
Financial liabilities
Total financial liabilities	969,808		380,055
Up to 1 month [Member] | Time deposits and other time liabilities [Member]
Financial liabilities
Total financial liabilities	5,843,682		5,184,567
Up to 1 month [Member] | Financial derivative contracts [Member]
Financial liabilities
Total financial liabilities	386,690		422,749
Up to 1 month [Member] | Interbank Borrowings [Member]
Financial liabilities
Total financial liabilities	238,414		363,560
Up to 1 month [Member] | Issued debt instruments [Member]
Financial liabilities
Total financial liabilities	344,732		285,159
Up to 1 month [Member] | Lease liabilities [member]
Financial liabilities
Total financial liabilities	38,148
Up to 1 month [Member] | Other financial liabilities [Member]
Financial liabilities
Total financial liabilities			5,155
Up to 1 month [Member] | Guarantees received (margin accounts) [Member]
Financial liabilities
Total financial liabilities
Up to 1 month [Member] | Financial Liabilitie [Member]
Financial liabilities
Total financial liabilities	7,821,474		6,641,245
Up to 1 month [Member] | Deposits and other demand liabilities [Member]
Financial liabilities
Total financial liabilities
Up to 1 month [Member] | Cash And Deposits In Banks [Member]
Financial assets
Total financial assets
Up to 1 month [Member] | Cash Items In Process Of Collection [Member]
Financial assets
Total financial assets
Up to 1 month [Member] | Financial assets held for trading [Member]
Financial assets
Total financial assets	680		38,644
Up to 1 month [Member] | Investments Under Resale Agreements [Member]
Financial assets
Total financial assets
Up to 1 month [Member] | Financial derivative contracts [Member]
Financial assets
Total financial assets	385,231		371,775
Up to 1 month [Member] | Loans And Accounts Receivable At Amortized Cost [Member]
Financial assets
Total financial assets	1,246,271	[1]	2,963,578	[2]
Up to 1 month [Member] | Loans and account receivable at FVOCI [Member]
Financial assets
Total financial assets		[3]		[4]
Up to 1 month [Member] | Debt instruments at FVOCI [Member]
Financial assets
Total financial assets	1,006,983		1,131,500
Up to 1 month [Member] | Equity instruments at FVOCI [Member]
Financial assets
Total financial assets
Up to 1 month [Member] | Guarantee deposits (margin accounts)
Financial assets
Total financial assets
Up to 1 month [Member] | Financial Asset [Member]
Financial assets
Total financial assets	2,639,165		4,505,497
Between 1 and 3 months [Member] | Cash And Deposits In Banks [Member]
Financial liabilities
Total financial liabilities
Between 1 and 3 months [Member] | Cash items in process of being cleared [Member]
Financial liabilities
Total financial liabilities
Between 1 and 3 months [Member] | Obligations under repurchase agreements [Member]
Financial liabilities
Total financial liabilities
Between 1 and 3 months [Member] | Time deposits and other time liabilities [Member]
Financial liabilities
Total financial liabilities	2,912,985		4,905,414
Between 1 and 3 months [Member] | Financial derivative contracts [Member]
Financial liabilities
Total financial liabilities	445,376		427,825
Between 1 and 3 months [Member] | Interbank Borrowings [Member]
Financial liabilities
Total financial liabilities	222,992		624,167
Between 1 and 3 months [Member] | Issued debt instruments [Member]
Financial liabilities
Total financial liabilities	447,117		759,519
Between 1 and 3 months [Member] | Lease liabilities [member]
Financial liabilities
Total financial liabilities	1,375
Between 1 and 3 months [Member] | Other financial liabilities [Member]
Financial liabilities
Total financial liabilities			30,969
Between 1 and 3 months [Member] | Guarantees received (margin accounts) [Member]
Financial liabilities
Total financial liabilities
Between 1 and 3 months [Member] | Financial Liabilitie [Member]
Financial liabilities
Total financial liabilities	4,029,845		6,747,894
Between 1 and 3 months [Member] | Deposits and other demand liabilities [Member]
Financial liabilities
Total financial liabilities
Between 1 and 3 months [Member] | Cash And Deposits In Banks [Member]
Financial assets
Total financial assets
Between 1 and 3 months [Member] | Cash Items In Process Of Collection [Member]
Financial assets
Total financial assets
Between 1 and 3 months [Member] | Financial assets held for trading [Member]
Financial assets
Total financial assets	2,630
Between 1 and 3 months [Member] | Investments Under Resale Agreements [Member]
Financial assets
Total financial assets
Between 1 and 3 months [Member] | Financial derivative contracts [Member]
Financial assets
Total financial assets	401,486		400,196
Between 1 and 3 months [Member] | Loans And Accounts Receivable At Amortized Cost [Member]
Financial assets
Total financial assets	1,443,659	[1]	2,400,909	[2]
Between 1 and 3 months [Member] | Loans and account receivable at FVOCI [Member]
Financial assets
Total financial assets		[3]		[4]
Between 1 and 3 months [Member] | Debt instruments at FVOCI [Member]
Financial assets
Total financial assets	493		3,752
Between 1 and 3 months [Member] | Equity instruments at FVOCI [Member]
Financial assets
Total financial assets
Between 1 and 3 months [Member] | Guarantee deposits (margin accounts)
Financial assets
Total financial assets
Between 1 and 3 months [Member] | Financial Asset [Member]
Financial assets
Total financial assets	1,848,268		2,804,857
Between 3 and 12 months [Member] | Cash And Deposits In Banks [Member]
Financial liabilities
Total financial liabilities
Between 3 and 12 months [Member] | Cash items in process of being cleared [Member]
Financial liabilities
Total financial liabilities
Between 3 and 12 months [Member] | Obligations under repurchase agreements [Member]
Financial liabilities
Total financial liabilities
Between 3 and 12 months [Member] | Time deposits and other time liabilities [Member]
Financial liabilities
Total financial liabilities	1,434,246		2,417,703
Between 3 and 12 months [Member] | Financial derivative contracts [Member]
Financial liabilities
Total financial liabilities	931,358		951,684
Between 3 and 12 months [Member] | Interbank Borrowings [Member]
Financial liabilities
Total financial liabilities	855,434		1,141,824
Between 3 and 12 months [Member] | Issued debt instruments [Member]
Financial liabilities
Total financial liabilities	343,156		1,044,674
Between 3 and 12 months [Member] | Lease liabilities [member]
Financial liabilities
Total financial liabilities	27		26,061
Between 3 and 12 months [Member] | Other financial liabilities [Member]
Financial liabilities
Total financial liabilities	25,526		28,888
Between 3 and 12 months [Member] | Guarantees received (margin accounts) [Member]
Financial liabilities
Total financial liabilities
Between 3 and 12 months [Member] | Financial Liabilitie [Member]
Financial liabilities
Total financial liabilities	3,589,747		5,610,834
Between 3 and 12 months [Member] | Deposits and other demand liabilities [Member]
Financial liabilities
Total financial liabilities
Between 3 and 12 months [Member] | Cash And Deposits In Banks [Member]
Financial assets
Total financial assets
Between 3 and 12 months [Member] | Cash Items In Process Of Collection [Member]
Financial assets
Total financial assets
Between 3 and 12 months [Member] | Financial assets held for trading [Member]
Financial assets
Total financial assets	499		645
Between 3 and 12 months [Member] | Investments Under Resale Agreements [Member]
Financial assets
Total financial assets
Between 3 and 12 months [Member] | Financial derivative contracts [Member]
Financial assets
Total financial assets	795,881		1,543,446
Between 3 and 12 months [Member] | Loans And Accounts Receivable At Amortized Cost [Member]
Financial assets
Total financial assets	3,664,841	[1]	5,511,374	[2]
Between 3 and 12 months [Member] | Loans and account receivable at FVOCI [Member]
Financial assets
Total financial assets	5,405	[3]	5,953	[4]
Between 3 and 12 months [Member] | Debt instruments at FVOCI [Member]
Financial assets
Total financial assets	188,977		52,130
Between 3 and 12 months [Member] | Equity instruments at FVOCI [Member]
Financial assets
Total financial assets
Between 3 and 12 months [Member] | Guarantee deposits (margin accounts)
Financial assets
Total financial assets
Between 3 and 12 months [Member] | Financial Asset [Member]
Financial assets
Total financial assets	4,655,603		7,113,548
Subtotal up to 1 year [Member] | Cash And Deposits In Banks [Member]
Financial liabilities
Total financial liabilities	14,560,893
Subtotal up to 1 year [Member] | Cash items in process of being cleared [Member]
Financial liabilities
Total financial liabilities	361,631		198,248
Subtotal up to 1 year [Member] | Obligations under repurchase agreements [Member]
Financial liabilities
Total financial liabilities	969,808		380,055
Subtotal up to 1 year [Member] | Time deposits and other time liabilities [Member]
Financial liabilities
Total financial liabilities	10,350,831		12,649,957
Subtotal up to 1 year [Member] | Financial derivative contracts [Member]
Financial liabilities
Total financial liabilities	1,763,424		1,802,258
Subtotal up to 1 year [Member] | Interbank Borrowings [Member]
Financial liabilities
Total financial liabilities	1,333,672		2,129,645
Subtotal up to 1 year [Member] | Issued debt instruments [Member]
Financial liabilities
Total financial liabilities	1,135,005		2,089,352
Subtotal up to 1 year [Member] | Lease liabilities [member]
Financial liabilities
Total financial liabilities	184,028		26,061
Subtotal up to 1 year [Member] | Other financial liabilities [Member]
Financial liabilities
Total financial liabilities	25,526		226,033
Subtotal up to 1 year [Member] | Guarantees received (margin accounts) [Member]
Financial liabilities
Total financial liabilities	624,205		994,714
Subtotal up to 1 year [Member] | Financial Liabilitie [Member]
Financial liabilities
Total financial liabilities	31,309,023		30,793,755
Subtotal up to 1 year [Member] | Deposits and other demand liabilities [Member]
Financial liabilities
Total financial liabilities			10,297,432
Subtotal up to 1 year [Member] | Cash And Deposits In Banks [Member]
Financial assets
Total financial assets	2,803,288		3,554,520
Subtotal up to 1 year [Member] | Cash Items In Process Of Collection [Member]
Financial assets
Total financial assets	452,963		355,062
Subtotal up to 1 year [Member] | Financial assets held for trading [Member]
Financial assets
Total financial assets	3,809		39,289
Subtotal up to 1 year [Member] | Investments Under Resale Agreements [Member]
Financial assets
Total financial assets
Subtotal up to 1 year [Member] | Financial derivative contracts [Member]
Financial assets
Total financial assets	1,582,598		2,315,417
Subtotal up to 1 year [Member] | Loans And Accounts Receivable At Amortized Cost [Member]
Financial assets
Total financial assets	6,524,985	[1]	11,172,322	[2]
Subtotal up to 1 year [Member] | Loans and account receivable at FVOCI [Member]
Financial assets
Total financial assets	5,405	[3]	5,953	[4]
Subtotal up to 1 year [Member] | Debt instruments at FVOCI [Member]
Financial assets
Total financial assets	1,196,453		1,187,382
Subtotal up to 1 year [Member] | Equity instruments at FVOCI [Member]
Financial assets
Total financial assets
Subtotal up to 1 year [Member] | Guarantee deposits (margin accounts)
Financial assets
Total financial assets	608,359		314,616
Subtotal up to 1 year [Member] | Financial Asset [Member]
Financial assets
Total financial assets	13,177,860		18,944,561
Between 1 and 3 years [Member] | Cash And Deposits In Banks [Member]
Financial liabilities
Total financial liabilities
Between 1 and 3 years [Member] | Cash items in process of being cleared [Member]
Financial liabilities
Total financial liabilities
Between 1 and 3 years [Member] | Obligations under repurchase agreements [Member]
Financial liabilities
Total financial liabilities
Between 1 and 3 years [Member] | Time deposits and other time liabilities [Member]
Financial liabilities
Total financial liabilities	163,053		357,856
Between 1 and 3 years [Member] | Financial derivative contracts [Member]
Financial liabilities
Total financial liabilities	1,552,482		1,253,280
Between 1 and 3 years [Member] | Interbank Borrowings [Member]
Financial liabilities
Total financial liabilities	1,140,426		387,936
Between 1 and 3 years [Member] | Issued debt instruments [Member]
Financial liabilities
Total financial liabilities	1,813,341		2,394,850
Between 1 and 3 years [Member] | Lease liabilities [member]
Financial liabilities
Total financial liabilities	89		45,978
Between 1 and 3 years [Member] | Other financial liabilities [Member]
Financial liabilities
Total financial liabilities	44,933		83
Between 1 and 3 years [Member] | Guarantees received (margin accounts) [Member]
Financial liabilities
Total financial liabilities
Between 1 and 3 years [Member] | Financial Liabilitie [Member]
Financial liabilities
Total financial liabilities	4,714,324		4,439,983
Between 1 and 3 years [Member] | Deposits and other demand liabilities [Member]
Financial liabilities
Total financial liabilities
Between 1 and 3 years [Member] | Cash And Deposits In Banks [Member]
Financial assets
Total financial assets
Between 1 and 3 years [Member] | Cash Items In Process Of Collection [Member]
Financial assets
Total financial assets
Between 1 and 3 years [Member] | Financial assets held for trading [Member]
Financial assets
Total financial assets	633		181,705
Between 1 and 3 years [Member] | Investments Under Resale Agreements [Member]
Financial assets
Total financial assets
Between 1 and 3 years [Member] | Financial derivative contracts [Member]
Financial assets
Total financial assets	1,723,334		1,383,493
Between 1 and 3 years [Member] | Loans And Accounts Receivable At Amortized Cost [Member]
Financial assets
Total financial assets	3,659,994	[1]	5,706,433	[2]
Between 1 and 3 years [Member] | Loans and account receivable at FVOCI [Member]
Financial assets
Total financial assets		[3]		[4]
Between 1 and 3 years [Member] | Debt instruments at FVOCI [Member]
Financial assets
Total financial assets	205,150		508,596
Between 1 and 3 years [Member] | Equity instruments at FVOCI [Member]
Financial assets
Total financial assets
Between 1 and 3 years [Member] | Guarantee deposits (margin accounts)
Financial assets
Total financial assets
Between 1 and 3 years [Member] | Financial Asset [Member]
Financial assets
Total financial assets	5,589,111		7,780,227
Between 3 and 5 years [Member] | Cash And Deposits In Banks [Member]
Financial liabilities
Total financial liabilities
Between 3 and 5 years [Member] | Cash items in process of being cleared [Member]
Financial liabilities
Total financial liabilities
Between 3 and 5 years [Member] | Obligations under repurchase agreements [Member]
Financial liabilities
Total financial liabilities
Between 3 and 5 years [Member] | Time deposits and other time liabilities [Member]
Financial liabilities
Total financial liabilities	44,384		163,121
Between 3 and 5 years [Member] | Financial derivative contracts [Member]
Financial liabilities
Total financial liabilities	1,708,509		1,180,948
Between 3 and 5 years [Member] | Interbank Borrowings [Member]
Financial liabilities
Total financial liabilities	3,854,501		2,237
Between 3 and 5 years [Member] | Issued debt instruments [Member]
Financial liabilities
Total financial liabilities	2,499,560		2,042,292
Between 3 and 5 years [Member] | Lease liabilities [member]
Financial liabilities
Total financial liabilities	105		36,393
Between 3 and 5 years [Member] | Other financial liabilities [Member]
Financial liabilities
Total financial liabilities	35,679		99
Between 3 and 5 years [Member] | Guarantees received (margin accounts) [Member]
Financial liabilities
Total financial liabilities
Between 3 and 5 years [Member] | Financial Liabilitie [Member]
Financial liabilities
Total financial liabilities	8,142,738		3,425,090
Between 3 and 5 years [Member] | Deposits and other demand liabilities [Member]
Financial liabilities
Total financial liabilities
Between 3 and 5 years [Member] | Cash And Deposits In Banks [Member]
Financial assets
Total financial assets
Between 3 and 5 years [Member] | Cash Items In Process Of Collection [Member]
Financial assets
Total financial assets
Between 3 and 5 years [Member] | Financial assets held for trading [Member]
Financial assets
Total financial assets	18,257		37,659
Between 3 and 5 years [Member] | Investments Under Resale Agreements [Member]
Financial assets
Total financial assets
Between 3 and 5 years [Member] | Financial derivative contracts [Member]
Financial assets
Total financial assets	1,692,142		1,346,329
Between 3 and 5 years [Member] | Loans And Accounts Receivable At Amortized Cost [Member]
Financial assets
Total financial assets	293,785	[1]	4,093,147	[2]
Between 3 and 5 years [Member] | Loans and account receivable at FVOCI [Member]
Financial assets
Total financial assets	16,243	[3]		[4]
Between 3 and 5 years [Member] | Debt instruments at FVOCI [Member]
Financial assets
Total financial assets	2,378,752		725,419
Between 3 and 5 years [Member] | Equity instruments at FVOCI [Member]
Financial assets
Total financial assets
Between 3 and 5 years [Member] | Guarantee deposits (margin accounts)
Financial assets
Total financial assets
Between 3 and 5 years [Member] | Financial Asset [Member]
Financial assets
Total financial assets	4,399,179		6,202,554
More than 5 years [Member] | Cash And Deposits In Banks [Member]
Financial liabilities
Total financial liabilities
More than 5 years [Member] | Cash items in process of being cleared [Member]
Financial liabilities
Total financial liabilities
More than 5 years [Member] | Obligations under repurchase agreements [Member]
Financial liabilities
Total financial liabilities
More than 5 years [Member] | Time deposits and other time liabilities [Member]
Financial liabilities
Total financial liabilities	23,523		21,883
More than 5 years [Member] | Financial derivative contracts [Member]
Financial liabilities
Total financial liabilities	3,994,245		3,154,168
More than 5 years [Member] | Issued debt instruments [Member]
Financial liabilities
Total financial liabilities	2,756,271		2,974,229
More than 5 years [Member] | Lease liabilities [member]
Financial liabilities
Total financial liabilities	96		50,062
More than 5 years [Member] | Other financial liabilities [Member]
Financial liabilities
Total financial liabilities	43,447		143
More than 5 years [Member] | Guarantees received (margin accounts) [Member]
Financial liabilities
Total financial liabilities
More than 5 years [Member] | Financial Liabilitie [Member]
Financial liabilities
Total financial liabilities	6,817,582		6,200,485
More than 5 years [Member] | Deposits and other demand liabilities [Member]
Financial liabilities
Total financial liabilities
More than 5 years [Member] | Cash And Deposits In Banks [Member]
Financial assets
Total financial assets
More than 5 years [Member] | Cash Items In Process Of Collection [Member]
Financial assets
Total financial assets
More than 5 years [Member] | Financial assets held for trading [Member]
Financial assets
Total financial assets	111,019		11,551
More than 5 years [Member] | Investments Under Resale Agreements [Member]
Financial assets
Total financial assets
More than 5 years [Member] | Financial derivative contracts [Member]
Financial assets
Total financial assets	4,034,011		3,103,369
More than 5 years [Member] | Loans And Accounts Receivable At Amortized Cost [Member]
Financial assets
Total financial assets	23,861,129	[1]	11,699,613	[2]
More than 5 years [Member] | Loans and account receivable at FVOCI [Member]
Financial assets
Total financial assets	49,037	[3]	60,213	[4]
More than 5 years [Member] | Debt instruments at FVOCI [Member]
Financial assets
Total financial assets	3,382,187		1,588,875
More than 5 years [Member] | Equity instruments at FVOCI [Member]
Financial assets
Total financial assets	548		482
More than 5 years [Member] | Guarantee deposits (margin accounts)
Financial assets
Total financial assets
More than 5 years [Member] | Financial Asset [Member]
Financial assets
Total financial assets	31,437,931		16,464,103
Subtotal More than 1 year [Member] | Cash And Deposits In Banks [Member]
Financial liabilities
Total financial liabilities
Subtotal More than 1 year [Member] | Cash items in process of being cleared [Member]
Financial liabilities
Total financial liabilities
Subtotal More than 1 year [Member] | Obligations under repurchase agreements [Member]
Financial liabilities
Total financial liabilities
Subtotal More than 1 year [Member] | Time deposits and other time liabilities [Member]
Financial liabilities
Total financial liabilities	230,960		542,860
Subtotal More than 1 year [Member] | Financial derivative contracts [Member]
Financial liabilities
Total financial liabilities	7,255,236		5,588,396
Subtotal More than 1 year [Member] | Interbank Borrowings [Member]
Financial liabilities
Total financial liabilities	4,994,927		390,173
Subtotal More than 1 year [Member] | Issued debt instruments [Member]
Financial liabilities
Total financial liabilities	7,069,172		7,411,371
Subtotal More than 1 year [Member] | Lease liabilities [member]
Financial liabilities
Total financial liabilities	290		132,433
Subtotal More than 1 year [Member] | Other financial liabilities [Member]
Financial liabilities
Total financial liabilities	124,059		325
Subtotal More than 1 year [Member] | Guarantees received (margin accounts) [Member]
Financial liabilities
Total financial liabilities
Subtotal More than 1 year [Member] | Financial Liabilitie [Member]
Financial liabilities
Total financial liabilities	19,674,644		14,065,558
Subtotal More than 1 year [Member] | Deposits and other demand liabilities [Member]
Financial liabilities
Total financial liabilities
Subtotal More than 1 year [Member] | Cash And Deposits In Banks [Member]
Financial assets
Total financial assets
Subtotal More than 1 year [Member] | Cash Items In Process Of Collection [Member]
Financial assets
Total financial assets
Subtotal More than 1 year [Member] | Financial assets held for trading [Member]
Financial assets
Total financial assets	129,909		230,915
Subtotal More than 1 year [Member] | Investments Under Resale Agreements [Member]
Financial assets
Total financial assets
Subtotal More than 1 year [Member] | Financial derivative contracts [Member]
Financial assets
Total financial assets	7,449,487		5,833,191
Subtotal More than 1 year [Member] | Loans And Accounts Receivable At Amortized Cost [Member]
Financial assets
Total financial assets	27,814,908	[1]	21,499,193	[2]
Subtotal More than 1 year [Member] | Loans and account receivable at FVOCI [Member]
Financial assets
Total financial assets	65,280	[3]	60,213	[4]
Subtotal More than 1 year [Member] | Debt instruments at FVOCI [Member]
Financial assets
Total financial assets	5,966,089		2,822,890
Subtotal More than 1 year [Member] | Equity instruments at FVOCI [Member]
Financial assets
Total financial assets	548		482
Subtotal More than 1 year [Member] | Guarantee deposits (margin accounts)
Financial assets
Total financial assets
Subtotal More than 1 year [Member] | Financial Asset [Member]
Financial assets
Total financial assets	$ 41,426,221		$ 30,446,884
[1]	Loans and accounts receivables at amortized cost are presented on a gross basis, the amount of allowance is Ch$1,036,793 million.
[2]	Loans and accounts receivables at amortized cost are presented on a gross basis, the amount of allowance is Ch$ 896,095 million.
[3]	Loans and accounts receivables at FVOCI are presented on a gross basis, the amount of allowance is Ch$1,354 million.
[4]	Loans and accounts receivables at FVOCI are presented on a gross basis, the amount of allowance is Ch$101 million.

Provisions and Contingent Pro_3

Provisions and Contingent Provisions (Details) - Schedule of composition provisions - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of composition provisions [Abstract]
Provisions for personnel salaries and expenses	$ 104,270	$ 101,223
Provisions for mandatory dividends	164,284	185,727
Provisions for contingent loan	28,247	23,240
Provision for contingencies	33,863	15,940
Total	$ 330,664	$ 326,130	$ 305,271	$ 303,798

Provisions and Contingent Pro_4

Provisions and Contingent Provisions (Details) - Schedule of activity regarding provision - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Provisions and Contingent Provisions (Details) - Schedule of activity regarding provision [Line Items]
Balance at beginning	$ 326,130	$ 305,271	$ 303,798
Provisions established	280,615	308,295	298,399
Application of provisions	(71,481)	(70,540)	(77,406)
Provisions released	(204,602)	(217,361)	(210,581)
Reclassifications
Other	2	465	(8,939)
Balance at end	330,664	326,130	305,271
Personnel salaries and expenses [Member]
Provisions and Contingent Provisions (Details) - Schedule of activity regarding provision [Line Items]
Balance at beginning	101,223	93,379	97,576
Provisions established	76,281	78,316	80,912
Application of provisions	(71,481)	(70,385)	(72,975)
Provisions released	(1,755)	(552)	(3,195)
Reclassifications
Other	2	465	(8,939)
Balance at end	104,270	101,223	93,379
Mandatory Dividend [Member]
Provisions and Contingent Provisions (Details) - Schedule of activity regarding provision [Line Items]
Balance at beginning	185,727	178,600	168,840
Provisions established	164,284	185,727	178,600
Application of provisions
Provisions released	(185,727)	(178,600)	(168,840)
Reclassifications
Other
Balance at end	164,284	185,727	178,600
Contingent loan risk [Member]
Provisions and Contingent Provisions (Details) - Schedule of activity regarding provision [Line Items]
Balance at beginning	23,240	23,709	9,480
Provisions established	14,683	15,879	19,240
Application of provisions
Provisions released	(9,676)	(16,348)	(5,011)
Reclassifications
Other
Balance at end	28,247	23,240	23,709
Contingencies [Member]
Provisions and Contingent Provisions (Details) - Schedule of activity regarding provision [Line Items]
Balance at beginning	15,940	9,583	27,902
Provisions established	25,367	28,373	19,647
Application of provisions		(155)	(4,431)
Provisions released	(7,444)	(21,861)	(33,535)
Reclassifications
Other
Balance at end	$ 33,863	$ 15,940	$ 9,583

Provisions and Contingent Pro_5

Provisions and Contingent Provisions (Details) - Schedule of provisions for personnel salaries and expenses - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Schedule of provisions for personnel salaries and expenses [Abstract]
Provision for seniority compensation	$ 6,658	$ 6,797
Provision for stock-based personnel benefits
Provision for performance bonus	65,786	68,595
Provision for vacations	29,307	23,864
Provision for other personnel benefits	2,519	1,967
Total	$ 104,270	$ 101,223

Provisions and Contingent Pro_6

Provisions and Contingent Provisions (Details) - Schedule of provisions for contingent loan risk - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Provisions and Contingent Provisions (Details) - Schedule of provisions for contingent loan risk [Line Items]
ECL allowance, beginning balance	$ 23,240	$ 23,709
Transfer
Transfers to stage 2	10,340	582
Transfers to stage 3	2,764	4,639
Transfers to stage 3	4,338	2,864
Transfers to stage 1	(6,717)	(387)
Transfers to stage 2	(1,700)	(1,264)
Transfers to stage 1	(430)	(1,363)
Net changes on financial assets	(2,853)	(5,471)
Write-off
Foreign Exchange adjustments and others	(735)	(137)
ECL allowance, ending balance	28,247	23,240
Individual [Member] | Stage 1 [Member]
Provisions and Contingent Provisions (Details) - Schedule of provisions for contingent loan risk [Line Items]
ECL allowance, beginning balance	1,509	1,081
Transfer
Transfers to stage 2	(1,273)	(100)
Transfers to stage 3
Transfers to stage 3
Transfers to stage 1	165	46
Transfers to stage 2
Transfers to stage 1
Net changes on financial assets	2,279	491
Write-off
Foreign Exchange adjustments and others	135	(9)
ECL allowance, ending balance	2,815	1,509
Individual [Member] | Stage 2 [Member]
Provisions and Contingent Provisions (Details) - Schedule of provisions for contingent loan risk [Line Items]
ECL allowance, beginning balance	226	259
Transfer
Transfers to stage 2	1,785	122
Transfers to stage 3
Transfers to stage 3	(73)	(24)
Transfers to stage 1	(295)	(82)
Transfers to stage 2
Transfers to stage 1
Net changes on financial assets	126	(41)
Write-off
Foreign Exchange adjustments and others	(6)	(8)
ECL allowance, ending balance	1,762	226
Individual [Member] | Stage 3 [Member]
Provisions and Contingent Provisions (Details) - Schedule of provisions for contingent loan risk [Line Items]
ECL allowance, beginning balance	3,487	3,856
Transfer
Transfers to stage 2
Transfers to stage 3	83	167
Transfers to stage 3	2,839	1,742
Transfers to stage 1
Transfers to stage 2	(6)	(54)
Transfers to stage 1		(130)
Net changes on financial assets	(2,995)	(2,100)
Write-off
Foreign Exchange adjustments and others	(170)	6
ECL allowance, ending balance	3,238	3,487
Collective [Member] | Stage 1 [Member]
Provisions and Contingent Provisions (Details) - Schedule of provisions for contingent loan risk [Line Items]
ECL allowance, beginning balance	13,127	15,070
Transfer
Transfers to stage 2	(3,614)	(318)
Transfers to stage 3	(76)	(203)
Transfers to stage 3
Transfers to stage 1	2,687	122
Transfers to stage 2
Transfers to stage 1	14	45
Net changes on financial assets	(200)	(1,474)
Write-off
Foreign Exchange adjustments and others	(928)	(115)
ECL allowance, ending balance	11,010	13,127
Collective [Member] | Stage 2 [Member]
Provisions and Contingent Provisions (Details) - Schedule of provisions for contingent loan risk [Line Items]
ECL allowance, beginning balance	542	172
Transfer
Transfers to stage 2	13,442	878
Transfers to stage 3
Transfers to stage 3	(148)	(144)
Transfers to stage 1	(9,274)	(473)
Transfers to stage 2	240	234
Transfers to stage 1
Net changes on financial assets	(315)	(106)
Write-off
Foreign Exchange adjustments and others	65	(19)
ECL allowance, ending balance	4,552	542
Collective [Member] | Stage 3 [Member]
Provisions and Contingent Provisions (Details) - Schedule of provisions for contingent loan risk [Line Items]
ECL allowance, beginning balance	4,349	3,271
Transfer
Transfers to stage 2
Transfers to stage 3	2,757	4,675
Transfers to stage 3	1,720	1,290
Transfers to stage 1
Transfers to stage 2	(1,934)	(1,444)
Transfers to stage 1	(444)	(1,278)
Net changes on financial assets	(1,748)	2,173
Write-off
Foreign Exchange adjustments and others	169	8
ECL allowance, ending balance	$ 4,869	$ 4,349

Other Liabilities (Details) - S

Other Liabilities (Details) - Schedule of other liabilities - CLP ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Schedule of other liabilities [Abstract]
Accounts and notes payable		$ 227,518	$ 214,216
Income received in advance		828	640
Macro-hedge valuation adjustment		51,089
Guarantees received (margin accounts)	[1]	624,205	994,714
Notes payable through brokerage and simultaneous transactions	[2]	12,504	1,418,340
Other payable obligations	[3]	139,622	61,555
Withholding VAT		14,129	8,147
Accounts payable insurance companies		13,911	9,510
Other liabilities		82,047	99,203
Total		$ 1,165,853	$ 2,806,325
[1]	Guarantee deposits (margin accounts) correspond to collateral associated to derivative financial contracts to mitigate the counterparty credit risk and are mainly established in cash. These guarantees operate when mark to market of derivative financial instruments exceed the levels of threshold agreed in the contracts, which could result in the Bank delivering or receiving collateral.
[2]	In December 2019, Santander Corredora de Bolsa acted as an intermediary in the public offering of shares between Latam and Delta, which was payed to shareholders on January 3, 2019.
[3]	Other payable obligations mainly relate to settlement of derivatives and other financial transactions derived from the operation of the Bank.

Contingencies and Commitments_2

Contingencies and Commitments (Details) - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Contingencies and Commitments (Details) [Line Items]
Estimated financial effect of contingent liabilities	$ 1,351,997	$ 1,592,810
Legal proceedings contingent liability [member]
Contingencies and Commitments (Details) [Line Items]
Estimated financial effect of contingent liabilities	$ 1,024
Legal proceedings contingent liability [member] | Subsidiaries [member]
Contingencies and Commitments (Details) [Line Items]
Estimated financial effect of contingent liabilities		$ 1,274
Guarantees [member] | USD [Member] | Non-adjusting events after reporting period [member]
Contingencies and Commitments (Details) [Line Items]
Integral bank policy of coverage of official loyalty	Banco Santander-Chile has an integral bank policy of coverage of Official Loyalty N°5014196 in force with the company Compañía de Seguros Chilena Consolidada S.A., coverage for USD50,000,000 per claim with an annual limit of USD100,000,000, which covers both the Bank and its subsidiaries, with an expiration date of June 30, 2021, which has been renewed.

Contingencies and Commitments_3

Contingencies and Commitments (Details) - Schedule of contractual obligations - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Schedule of contractual obligations [Abstract]
Letters of credit issued	$ 165,119	$ 140,572
Foreign letters of credit confirmed	82,779	70,192
Performance guarantee	1,090,643	1,929,894
Personal guarantees	441,508	451,950
Total contingent liabilities	1,780,049	2,592,608
Available on demand credit lines	8,391,414	8,732,422
Other irrevocable credit commitments	406,234	485,991
Total loan commitment	8,797,648	9,218,413
Total	$ 10,577,697	$ 11,811,021

Contingencies and Commitments_4

Contingencies and Commitments (Details) - Schedule of held securities - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Third party operations
Collections	$ 83,392	$ 90,966
Transferred financial assets managed by the Bank	18,017	21,507
Assets from third parties managed by the Bank and its affiliates	1,352,032	1,592,845
Subtotal	1,453,441	1,705,318
Custody of securities
Securities held in custody	11,022,790	9,731,894
Securities held in custody deposited in other entity	808,186	1,206,541
Issued securities held in custody	10,461,847	21,636,819
Subtotal	22,292,823	32,575,254
Total	$ 23,746,264	$ 34,280,572

Equity (Details)

Equity (Details) - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure of share capital, reserves and other equity interest [text block] [Abstract]
Shares outstanding (in Shares)	188,446,126,794	188,446,126,794	188,446,126,794	188,446,126,794
Increase in capital	$ 891,303
Percentage of capitalization earnings	40.00%
Retained earnings to reserves	$ 220,838	$ 236,761	$ 141,204

Equity (Details) - Schedule of

Equity (Details) - Schedule of activity shares - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of activity shares [Abstract]
Issued as of beginning of period	188,446,126,794	188,446,126,794	188,446,126,794
Issuance of paid shares
Issuance of outstanding shares
Stock options exercised
Issued as of end of period	188,446,126,794	188,446,126,794	188,446,126,794

Equity (Details) - Schedule o_2

Equity (Details) - Schedule of shareholder composition - shares		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Equity (Details) - Schedule of shareholder composition [Line Items]
Shares		165,995,455,123	163,624,085,523	161,960,126,723
American Depository Receipts (ADRs)	[1]	22,450,671,671	24,822,041,271	26,486,000,071
Total		188,446,126,794	188,446,126,794	188,446,126,794	188,446,126,794
Percentage of equity holding		100.00%	100.00%	100.00%
Santander Chile Holding S.A. [Member]
Equity (Details) - Schedule of shareholder composition [Line Items]
Shares		66,822,519,695	66,822,519,695	66,822,519,695
American Depository Receipts (ADRs)	[1]
Total		66,822,519,695	66,822,519,695	66,822,519,695
Percentage of equity holding		35.46%	35.46%	35.46%
Teatinos Siglo XXI Inversiones Limitada [Member]
Equity (Details) - Schedule of shareholder composition [Line Items]
Shares		59,770,481,573	59,770,481,573	59,770,481,573
American Depository Receipts (ADRs)	[1]
Total		59,770,481,573	59,770,481,573	59,770,481,573
Percentage of equity holding		31.72%	31.72%	31.72%
The Bank New York Mellon [Member]
Equity (Details) - Schedule of shareholder composition [Line Items]
Shares
American Depository Receipts (ADRs)	[1]	22,450,671,671	24,822,041,271	26,486,000,071
Total		22,450,671,671	24,822,041,271	26,486,000,071
Percentage of equity holding		11.91%	13.17%	14.05%
Banks On Behalf Of Third Parties [Member]
Equity (Details) - Schedule of shareholder composition [Line Items]
Shares		15,925,407,468	15,957,137,883	15,770,481,573
American Depository Receipts (ADRs)	[1]
Total		15,925,407,468	15,957,137,883	15,770,481,573
Percentage of equity holding		8.45%	8.47%	8.20%
Pension Funds (AFP) On Behalf Of Third Parties [Member]
Equity (Details) - Schedule of shareholder composition [Line Items]
Shares		9,929,343,874	9,995,705,956	9,033,172,896
American Depository Receipts (ADRs)	[1]
Total		9,929,343,874	9,995,705,956	9,033,172,896
Percentage of equity holding		5.27%	5.30%	4.79%
Stock Brokers On Behalf Of Third Parties [Member]
Equity (Details) - Schedule of shareholder composition [Line Items]
Shares		6,892,162,980	5,551,024,270	4,773,558,507
American Depository Receipts (ADRs)	[1]
Total		6,892,162,980	5,551,024,270	4,773,558,507
Percentage of equity holding		3.66%	2.95%	2.53%
Other Minority Holders [Member]
Equity (Details) - Schedule of shareholder composition [Line Items]
Shares		6,655,539,533	5,527,216,146	6,109,287,067
American Depository Receipts (ADRs)	[1]
Total		6,655,539,533	5,527,216,146	6,109,287,067
Percentage of equity holding		3.53%	2.93%	3.25%
[1]	American Depository Receipts (ADR) are certificates issued by a U.S. commercial bank to be traded on the U.S. securities markets.

Equity (Details) - Schedule o_3

Equity (Details) - Schedule of basic and diluted earnings per share $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020CLP ($)$ / sharesshares	Dec. 31, 2020$MN / shares	Dec. 31, 2019CLP ($)$ / sharesshares	Dec. 31, 2019$MN / shares	Dec. 31, 2018CLP ($)$ / sharesshares	Dec. 31, 2018$MN / shares
a) Basic earnings per share
Total attributable to the shareholders of the Bank (in Pesos) | $	$ 547,614		$ 619,091		$ 595,333
Weighted average number of outstanding shares (in Shares)	188,446,126,794		188,446,126,794		188,446,126,794
Basic earnings per share (in Ch$) | (per share)	$ 2.906	$MN 2.906	$ 3.285	$MN 3.285	$ 3.159	$MN 3.159
Basic earnings per share from continuing operations (in Ch$) | (per share)	$ 2.906	2.906	3.276	3.276	3.139	3.139
Basic earnings per share from discontinued operations (in Ch$) | (per share)			$ 0.009	0.009	$ 0.020	0.020
b) Diluted earnings per share
Total attributable to the shareholders of the Bank (in Pesos) | $	$ 547,614		$ 619,091		$ 595,333
Weighted average number of outstanding shares (in Shares)	188,446,126,794		188,446,126,794		188,446,126,794
Adjusted number of shares (in Shares)	188,446,126,794		188,446,126,794		188,446,126,794
Diluted earnings per share (in Ch$) | (per share)	$ 2.906	2.906	$ 3.285	3.285	$ 3.159	3.159
Diluted earnings per share from continuing operations (in Ch$) | (per share)	$ 2.906	2.906	3.276	3.276	3.139	3.139
Diluted earnings per share from discontinued operations (in Ch$) | (per share)			$ 0.009	$MN 0.009	$ 0.020	$MN 0.020

Equity (Details) - Schedule o_4

Equity (Details) - Schedule of other comprehensive income from available for sale investments and cash flow hedges - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt instruments at FVOCI
As of beginning of period	$ 29,184	$ 6,962	$ 1,855
Gain (losses) on the re-measurement of debt instruments at FVOCI, before tax	30,062	(17,775)	6,609
Recycling from other comprehensive income to income for the year	43,609	39,997	(1,502)
Subtotals	73,671	22,222	5,107
As of end of period	102,885	29,184	6,962
Cash flow hedges
As of beginning of period	(40,435)	9,803	(3,562)
Gains (losses) on the re-measurement of cash flow hedges, before tax	(93,182)	(49,163)	14,048
Recycling adjustments on cash flow hedges, before tax	(3,148)	(1,075)	(683)
Amounts removed from equity and included in carrying amount of non-financial asset (liability) which acquisition or incurrence was hedged as a highly probable transaction
Subtotals	(96,330)	(50,238)	13,365
As of end of period	(136,765)	(40,435)	9,803
Other comprehensive income, before taxes	(33,910)	(11,251)	16,765
Income tax related to other comprehensive income components
Income tax relating to debt instruments at FVOCI	(27,464)	(7,756)	(1,810)
Income tax relating to cash flow hedges	36,927	10,918	(2,646)
Total	9,463	3,162	(4,456)
Other comprehensive income, net of tax	(24,447)	(8,089)	12,309
Attributable to:
Shareholders of the Bank	(25,293)	(8,856)	11,353
Non-controlling interest	$ 846	$ 767	$ 956

Non-controlling Interest (Detai

Non-controlling Interest (Details)	9 Months Ended
	Nov. 27, 2019
Disclosure of non-controlling interests [text block] [Abstract]
Bank acquired, percentage	51.00%
Non-controlling interest, percentage	49.00%

Non-controlling Interest (Det_2

Non-controlling Interest (Details) - Schedule of non-controlling interest included in the equity and the income - CLP ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018
Subsidiaries:
Equity	$ 84,683,000	$ 79,633,000		$ 46,163,000
Income	5,116,000	2,222,000		4,360,000
Debt instruments at FVOCI	110,000	(260,000)		(86,000)
Deferred tax	(31,000)	71,000		2,000
Total other comprehensive income	79,000	(189,000)		(84,000)
Comprehensive income	$ 5,195,000	$ 2,033,000		$ 4,276,000
Santander Corredora de Seguros Limitada [Member]
Subsidiaries:
Non- controlling %	25.00%	0.25%		0.25%
Equity	$ 174,000	$ 178,000		$ 172,000
Income	(4,000)	6,000		4,000
Debt instruments at FVOCI	(4,000)	1,000		(2,000)
Deferred tax	1,000
Total other comprehensive income	(3,000)	1,000		(2,000)
Comprehensive income	$ (7,000)	$ 7,000		$ 2,000
Santander Corredores de Bolsa Limitada [Member]
Subsidiaries:
Non- controlling %	4941.00%	49.41%		49.41%
Equity	$ 22,614	$ 22,301,000		$ 21,673,000
Income	351,000	625,000		755,000
Debt instruments at FVOCI	(38,000)	(261,000)		(84,000)
Deferred tax	9,000	71,000		2,000
Total other comprehensive income	(29,000)	(190,000)		(82,000)
Comprehensive income	$ 322,000	$ 435,000		$ 673,000
Santander Asesorias Financieras Limitada [Member]
Subsidiaries:
Non- controlling %	97.00%	0.97%	[1]
Equity	$ 493,000	$ 498,000	[1]
Income	(5,000)	9,000	[1]
Debt instruments at FVOCI	152,000		[1]
Deferred tax	(41,000)		[1]
Total other comprehensive income	111,000		[1]
Comprehensive income	$ 106,000	$ 9,000	[1]
Santander S.A. Sociedad Securitizadora [Member]
Subsidiaries:
Non- controlling %	36.00%	0.36%		0.36%
Equity	$ 2,000	$ 2,000		$ 2,000
Income
Debt instruments at FVOCI
Deferred tax
Total other comprehensive income
Comprehensive income
Klare Corredora de Seguros S.A. [Member]
Subsidiaries:
Non- controlling %	4990.00%	49.90%
Equity	$ 2,902	$ 3,782,000
Income	(880,000)	(503,000)
Debt instruments at FVOCI
Deferred tax
Total other comprehensive income
Comprehensive income	$ (880,000)	$ (503,000)
Santander Consumer Chile S.A. [Member]
Subsidiaries:
Non- controlling %	4900.00%	49.00%	[2]
Equity	$ 29,649	$ 24,564,000	[2]
Income	5,619,000	1,544,000	[2]
Debt instruments at FVOCI			[2]
Deferred tax			[2]
Total other comprehensive income			[2]
Comprehensive income	5,619,000	1,544,000	[2]
Total subsidiaries [Member]
Subsidiaries:
Equity	55,834,000	51,325,000		22,335,000
Income	5,081,000	1,681,000		858,000
Debt instruments at FVOCI	110,000	(260,000)		(86,000)
Deferred tax	(31,000)	71,000		2,000
Total other comprehensive income	79,000	(189,000)		(84,000)
Comprehensive income	$ 5,160,000	$ 1,492,000		$ 774,000
Santander Gestion de Recaudacion y Cobranzas Limitada [Member]
Subsidiaries:
Non- controlling %	10000.00%	100.00%		100.00%
Equity	$ 4,808,000	$ 3,777,000		$ 3,777,000
Income	(127,000)	1,031,000		852,000
Debt instruments at FVOCI
Deferred tax
Total other comprehensive income
Comprehensive income	$ (127,000)	$ 1,031,000		$ 852,000
Bansa Santander S.A. [Member]
Subsidiaries:
Non- controlling %	10000.00%	100.00%		100.00%
Equity	$ 19,565,000	$ 20,051,000		$ 20,051,000
Income	349,000	(486,000)		2,650,000
Debt instruments at FVOCI
Deferred tax
Total other comprehensive income
Comprehensive income	$ 349,000	$ (486,000)		2,650,000
Multiplica Spa [Member]
Subsidiaries:
Non- controlling %	10000.00%	100.00%
Equity	$ 4,476,000	$ 4,480,000
Income	(187,000)	(4,000)
Debt instruments at FVOCI
Deferred tax
Total other comprehensive income
Comprehensive income	(187,000)	(4,000)
Total Entities controlled through other considerations [Member]
Subsidiaries:
Equity	28,849,000	28,308,000		23,828,000
Income	35,000	541,000		3,502,000
Debt instruments at FVOCI
Deferred tax
Total other comprehensive income
Comprehensive income	$ 35,000	$ 541,000		$ 3,502,000
Santander Agente de Valores Limitada [Member]
Subsidiaries:
Non- controlling %				0.94%
Equity				$ 488,000
Income				99,000
Debt instruments at FVOCI
Deferred tax
Total other comprehensive income
Comprehensive income				$ 99,000
[1]	Formerly Santander Agente de Valores Limitada
[2]	On November 27, 2019, the Bank acquired 51% of Santander Consumer S.A., and the remaining 49% is accounted as non-controlling interest.

Non-controlling Interest (Det_3

Non-controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Non-controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests [Line Items]
Assets	$ 1,040,914	$ 2,228,682	$ 258,617
Liabilities	763,830	1,972,044	71,272
Capital	269,657	239,990	170,296
Net income	7,427	16,648	17,049
Santander Corredora de Seguros Limitada [Member]
Non-controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests [Line Items]
Assets	79,936	82,918	77,764
Liabilities	10,777	12,372	9,595
Capital	70,554	68,159	66,374
Net income	(1,395)	2,387	1,795
Santander Corredores de Bolsa Limitada [Member]
Non-controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests [Line Items]
Assets	94,802	1,479,974	102,228
Liabilities	49,038	1,434,843	57,999
Capital	45,053	43,866	42,691
Net income	711	1,265	1,538
Santander Asesorias Financieras Limitada [Member]
Non-controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests [Line Items]
Assets	52,070	51,505	50,552
Liabilities	1,142	51	71
Capital	51,454	50,481	40,177
Net income	(526)	973	10,304
Santander S.A. Sociedad Securitizadora [Member]
Non-controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests [Line Items]
Assets	630	636	704
Liabilities	175	88	66
Capital	547	639	728
Net income	(92)	(91)	(90)
Klare Corredora de Seguros S.A. [Member]
Non-controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests [Line Items]
Assets	6,415	8,303
Liabilities	599	724
Capital	7,579	8,586
Net income	(1,763)	(1,007)
Santander Consumer Chile S.A. [Member]
Non-controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests [Line Items]
Assets	693,992	505,059
Liabilities	633,177	452,528
Capital	49,348	39,951
Net income	11,467	12,580
Sociedad operadora de Tarjetas de Pago Santander Getnet Chile S.A. [Member]
Non-controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests [Line Items]
Assets	16,448
Liabilities	1,185
Capital	16,273
Net income	(1,010)
Santander Gestion de Recaudacion y Cobranzas Limitada [Member]
Non-controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests [Line Items]
Assets	7,789	8,200	6,932
Liabilities	3,108	3,392	3,155
Capital	4,808	3,777	2,925
Net income	(127)	1,031	852
Bansa Santander S.A. [Member]
Non-controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests [Line Items]
Assets	84,496	87,607	20,437
Liabilities	64,582	68,042	386
Capital	19,565	20,051	17,401
Net income	349	(486)	2,650
Multiplica Spa [Member]
Non-controlling Interest (Details) - Schedule of financial information of the subsidiaries included in the consolidation of the Bank that possess non-controlling interests [Line Items]
Assets	4,336	4,480
Liabilities	47	4
Capital	4,476	4,480
Net income	$ (187)	$ (4)

Interest Income (Details) - Sch

Interest Income (Details) - Schedule of income from interest - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	$ 2,233,623	$ 2,314,637	$ 2,243,123
Resale Agreements [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	124	718	903
Interbank Loans [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	36	1,263	897
Commercial Loans [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	906,683	957,224	936,264
Mortgage Loans [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	637,955	633,938	597,655
Consumer loans [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	569,946	602,196	586,534
Investment Instruments [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	105,417	97,319	100,213
Other Interest Income [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	13,462	21,979	20,657
Hedged Of Interest [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	1,687,680	1,815,170	1,775,256
Hedged Of Interest [Member] | Resale Agreements [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	124	718	903
Hedged Of Interest [Member] | Interbank Loans [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	36	1,263	897
Hedged Of Interest [Member] | Commercial Loans [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	722,116	780,284	771,405
Hedged Of Interest [Member] | Mortgage Loans [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	322,687	349,663	330,055
Hedged Of Interest [Member] | Consumer loans [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	564,363	593,705	579,929
Hedged Of Interest [Member] | Investment Instruments [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	69,276	71,150	75,423
Hedged Of Interest [Member] | Other Interest Income [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	9,078	18,387	16,644
Hedged Of Inflation Adjustments [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	530,000	474,427	449,784
Hedged Of Inflation Adjustments [Member] | Resale Agreements [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting
Hedged Of Inflation Adjustments [Member] | Interbank Loans [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting
Hedged Of Inflation Adjustments [Member] | Commercial Loans [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	174,360	160,462	153,851
Hedged Of Inflation Adjustments [Member] | Mortgage Loans [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	314,777	283,820	266,691
Hedged Of Inflation Adjustments [Member] | Consumer loans [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	338	384	439
Hedged Of Inflation Adjustments [Member] | Investment Instruments [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	36,141	26,169	24,790
Hedged Of Inflation Adjustments [Member] | Other Interest Income [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	4,384	3,592	4,013
Hedged Of Prepaid Fees [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	15,943	25,040	18,083
Hedged Of Prepaid Fees [Member] | Resale Agreements [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting
Hedged Of Prepaid Fees [Member] | Interbank Loans [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting
Hedged Of Prepaid Fees [Member] | Commercial Loans [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	10,207	16,478	11,008
Hedged Of Prepaid Fees [Member] | Mortgage Loans [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	491	455	909
Hedged Of Prepaid Fees [Member] | Consumer loans [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting	5,245	8,107	6,166
Hedged Of Prepaid Fees [Member] | Investment Instruments [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting
Hedged Of Prepaid Fees [Member] | Other Interest Income [Member]
Interest Income (Details) - Schedule of income from interest [Line Items]
Interest income not including income from hedge accounting

Interest Income (Details) - S_2

Interest Income (Details) - Schedule of interest expense - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	$ (624,314)	$ (866,327)	$ (809,956)
Demand Deposits [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(15,102)	(15,526)	(16,285)
Repurchase Agreements [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(1,899)	(9,710)	(6,439)
Time Deposits And Liabilities [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(161,967)	(362,479)	(352,345)
Interbank Loans [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(45,103)	(50,354)	(39,971)
Issued Debt Instruments [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(372,646)	(395,999)	(374,682)
Other financial liabilities [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(648)	(1,343)	(2,808)
Lease contracts [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(2,651)	(2,965)
Other Interest Expense [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(24,298)	(27,951)	(17,426)
Hedged Of Interest [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(447,084)	(680,827)	(629,467)
Hedged Of Interest [Member] | Demand Deposits [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(13,576)	(14,018)	(14,914)
Hedged Of Interest [Member] | Repurchase Agreements [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(1,899)	(9,710)	(6,439)
Hedged Of Interest [Member] | Time Deposits And Liabilities [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(141,091)	(335,307)	(317,061)
Hedged Of Interest [Member] | Interbank Loans [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(45,103)	(50,354)	(39,971)
Hedged Of Interest [Member] | Issued Debt Instruments [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(232,551)	(250,512)	(241,455)
Hedged Of Interest [Member] | Other financial liabilities [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(637)	(1,310)	(2,698)
Hedged Of Interest [Member] | Lease contracts [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(2,651)	(2,965)
Hedged Of Interest [Member] | Other Interest Expense [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(9,576)	(16,651)	(6,929)
Hedged Of Inflation Adjustments [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(177,230)	(185,500)	(180,489)
Hedged Of Inflation Adjustments [Member] | Demand Deposits [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(1,526)	(1,508)	(1,371)
Hedged Of Inflation Adjustments [Member] | Repurchase Agreements [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting
Hedged Of Inflation Adjustments [Member] | Time Deposits And Liabilities [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(20,876)	(27,172)	(35,284)
Hedged Of Inflation Adjustments [Member] | Interbank Loans [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting
Hedged Of Inflation Adjustments [Member] | Issued Debt Instruments [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(140,095)	(145,487)	(133,227)
Hedged Of Inflation Adjustments [Member] | Other financial liabilities [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	(11)	(33)	(110)
Hedged Of Inflation Adjustments [Member] | Lease contracts [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting
Hedged Of Inflation Adjustments [Member] | Other Interest Expense [Member]
Interest Income (Details) - Schedule of interest expense [Line Items]
Interest expense not including expenses from hedge accounting	$ (14,722)	$ (11,300)	$ (10,497)

Interest Income (Details) - S_3

Interest Income (Details) - Schedule of income and expense from interest - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of income and expense from interest [Abstract]
Interest income not including income from hedge accounting	$ 2,233,623	$ 2,314,637	$ 2,243,123
Interest expense not including expense from hedge accounting	(624,314)	(866,327)	(809,956)
Net Interest income (expense) from hedge accounting	1,609,309	1,448,310	1,433,167
Hedge accounting (net)	(15,461)	(31,346)	(18,799)
Total net interest income	$ 1,593,848	$ 1,416,964	$ 1,414,368

Fees and Commissions (Details)

Fees and Commissions (Details) - Schedule of fees and commission - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Fee and commission income
Fees and commissions for lines of credits and overdrafts	$ 7,428	$ 10,315	$ 6,624
Fees and commissions for guarantees and letters of credit	36,277	35,039	33,654
Fees and commissions for card services	196,308	225,702	218,903
Fees and commissions for management of accounts	34,825	35,949	33,865
Fees and commissions for collections and payments	23,242	33,355	40,077
Fees and commissions for intermediation and management of securities	11,272	10,154	10,147
Insurance brokerage fees	39,764	49,664	39,949
Office banking	15,119	13,655	15,921
Fees for other services rendered	44,072	47,331	45,633
Other fees earned	42,855	37,494	39,690
Total	451,162	498,658	484,463
Fee and commission expense
Compensation for card operation	(123,011)	(171,513)	(163,794)
Fees and commissions for securities transactions	(896)	(1,001)	(936)
Office banking	(2,078)	(1,860)	(4,096)
Interbank services	(24,957)	(19,839)	(14,413)
Other fees	(32,942)	(17,359)	(10,339)
Total	(183,884)	(211,572)	(193,578)
Net fees and commissions income	$ 267,278	$ 287,086	$ 290,885

Fees and Commissions (Details_2

Fees and Commissions (Details) - Schedule of income and expences - CLP ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Commission income
Commissions for lines of credit and overdrafts	$ 7,428,000	$ 10,315,000	$ 6,624,000
Commissions for guarantees and letters of credit	36,277,000	35,039,000	33,654,000
Commissions for card services	196,308,000	225,702,000	218,903,000
Commissions for account management	34,825,000	35,949,000	33,865,000
Commissions for collections, collections and payments	23,242,000	33,355,000	40,077,000
Commissions for intermediation and management of values	11,272,000	10,154,000	10,147,000
Office banking	15,119,000	13,655,000	15,921,000
Other remuneration for services rendered	44,072,000	47,331,000	45,633,000
Commission expenses
Commissions per transaction with securities	(896,000)	(1,001,000)	(936,000)
Office banking	(2,078,000)	(1,860,000)	(4,096,000)
Interbank services	(24,957,000)	(19,839,000)	(14,413,000)
Other commissions	(32,942,000)	(17,359,000)	(10,339,000)
Total	(183,884,000)	(211,572,000)	(193,578,000)
Total Net commission income and expenses	267,278,000	287,086,000	$ 290,885,000
Individuals and PYMEs [Member]
Commission income
Commissions for lines of credit and overdrafts	6,334,000	6,123,000
Commissions for guarantees and letters of credit	11,304,000	11,553,000
Commissions for card services	187,098,000	218,635,000
Commissions for account management	31,508,000	32,608,000
Commissions for collections, collections and payments	21,281,000	36,129,000
Commissions for intermediation and management of values	3,353,000	3,219,000
Remuneration for insurance commercialization	39,764,000	49,664,000
Office banking	10,393,000	9,280,000
Other remuneration for services rendered	39,318,000	42,499,000
Other commissions earned	18,948,000	12,462,000
Total	369,301,000	422,172,000
Commission expenses
Remuneration for card operation	(118,255,000)	(168,024,000)
Commissions per transaction with securities
Office banking	(1,326,000)	(1,186,000)
Interbank services	(16,073)	(12,776,000)
Other commissions	(20,216,000)	(9,559,000)
Total	(155,870,000)	(191,545,000)
Total Net commission income and expenses	213,431,000	230,627,000
Companies and Institutions [Member]
Commission income
Commissions for lines of credit and overdrafts	690,000	935,000
Commissions for guarantees and letters of credit	17,505,000	17,531,000
Commissions for card services	6,620,000	6,042,000
Commissions for account management	2,495,000	2,515,000
Commissions for collections, collections and payments	1,514,000	2,185,000
Commissions for intermediation and management of values	299,000	245,000
Remuneration for insurance commercialization
Office banking	4,077,000	3,782,000
Other remuneration for services rendered	3,606,000	3,748,000
Other commissions earned	11,716,000	10,727,000
Total	48,522,000	47,710,000
Commission expenses
Remuneration for card operation	(3,020,000)	(3,475,000)
Commissions per transaction with securities
Office banking	(434,000)	(389,000)
Interbank services	(5,183,000)	(4,121,000)
Other commissions	(1,550,000)	(1,013,000)
Total	(10,187,000)	(8,998,000)
Total Net commission income and expenses	38,335,000	38,712,000
Global Investment Banking [Member]
Commission income
Commissions for lines of credit and overdrafts	398,000	3,240,000
Commissions for guarantees and letters of credit	7,112,000	5,842,000
Commissions for card services	2,568,000	950,000
Commissions for account management	819,000	823,000
Commissions for collections, collections and payments	367,000	464,000
Commissions for intermediation and management of values	8,149,000	8,301,000
Remuneration for insurance commercialization
Office banking	649,000	606,000
Other remuneration for services rendered	1,028,000	839,000
Other commissions earned	12,850,000	14,293,000
Total	33,940,000	35,358,000
Commission expenses
Remuneration for card operation	(1,070,000)	(321,000)
Commissions per transaction with securities	(69,000)	(33,000)
Office banking	(314,000)	(282,000)
Interbank services	(3,663,000)	(2,912,000)
Other commissions	(5,644,000)	(2,707,000)
Total	(10,760,000)	(6,255,000)
Total Net commission income and expenses	23,180,000	29,103,000
Others [Member]
Commission income
Commissions for lines of credit and overdrafts	6,000	17,000
Commissions for guarantees and letters of credit	356,000	113,000
Commissions for card services	22,000	75,000
Commissions for account management	3,000	3,000
Commissions for collections, collections and payments	80,000	(5,423,000)
Commissions for intermediation and management of values	(529,000)	(1,611,000)
Remuneration for insurance commercialization
Office banking		(13,000)
Other remuneration for services rendered	120,000	245,000
Other commissions earned	(659,000)	12,000
Total	(601,000)	(6,582,000)
Commission expenses
Remuneration for card operation	(666,000)	307,000
Commissions per transaction with securities	(827,000)	(968,000)
Office banking	(4,000)	(3,000)
Interbank services	(38,000)	(30,000)
Other commissions	(5,532,000)	(4,080,000)
Total	(7,067,000)	(4,774,000)
Total Net commission income and expenses	(7,668,000)	(11,356,000)
Total [Member]
Commission income
Commissions for lines of credit and overdrafts	7,428,000	10,315,000
Commissions for guarantees and letters of credit	36,277,000	35,039,000
Commissions for card services	196,308,000	225,702,000
Commissions for account management	34,825,000	35,949,000
Commissions for collections, collections and payments	23,242,000	33,355,000
Commissions for intermediation and management of values	11,272,000	10,154,000
Remuneration for insurance commercialization	39,764,000	49,664,000
Office banking	15,119,000	13,655,000
Other remuneration for services rendered	44,072,000	47,331,000
Other commissions earned	42,855,000	37,494,000
Total	451,162,000	498,658,000
Commission expenses
Remuneration for card operation	(123,011,000)	(171,513,000)
Commissions per transaction with securities	(896,000)	(1,001,000)
Office banking	(2,078,000)	(1,860,000)
Interbank services	(24,957,000)	(19,839,000)
Other commissions	(32,942,000)	(8,359,000)
Total	(183,884,000)	(211,572,000)
Total Net commission income and expenses	267,278,000	287,086,000
Transferred over time [Member]
Commission income
Commissions for lines of credit and overdrafts	7,428,000	10,315,000
Commissions for guarantees and letters of credit	36,277,000	35,039,000
Commissions for card services	47,073,000	41,347,000
Commissions for account management	34,825,000	35,949,000
Commissions for collections, collections and payments
Commissions for intermediation and management of values
Remuneration for insurance commercialization
Office banking
Other remuneration for services rendered
Other commissions earned
Total	125,603,000	122,650,000
Commission expenses
Remuneration for card operation
Commissions per transaction with securities
Office banking
Other commissions
Total
Total Net commission income and expenses	125,603,000	122,650,000
Transferred at a point in time [Member]
Commission income
Commissions for lines of credit and overdrafts
Commissions for guarantees and letters of credit
Commissions for card services	149,235,000	184,355,000
Commissions for account management
Commissions for collections, collections and payments	11,303,000	12,854,000
Commissions for intermediation and management of values	11,272,000	10,154,000
Remuneration for insurance commercialization
Office banking	15,119,000	13,655,000
Other remuneration for services rendered	44,072,000	47,331,000
Other commissions earned	42,855,000	37,494,000
Total	273,856,000	305,843,000
Commission expenses
Remuneration for card operation	(68,550,000)	(171,513,000)
Commissions per transaction with securities	(896,000)	(1,001,000)
Office banking	(2,078,000)	(1,860,000)
Interbank services	(24,957,000)	(19,839,000)
Other commissions	(32,942,000)	(8,359,000)
Total	(129,423,000)	(211,572,000)
Total Net commission income and expenses	144,433,000	94,271,000
Accrual model [Member]
Commission income
Commissions for lines of credit and overdrafts
Commissions for guarantees and letters of credit
Commissions for card services
Commissions for account management
Commissions for collections, collections and payments	11,939,000	20,501,000
Commissions for intermediation and management of values
Remuneration for insurance commercialization	39,764,000	49,664,000
Office banking
Other remuneration for services rendered
Other commissions earned
Total	51,703,000	70,165,000
Commission expenses
Remuneration for card operation	(54,461,000)
Commissions per transaction with securities
Office banking
Other commissions
Total	(54,461,000)
Total Net commission income and expenses	$ (2,758,000)	$ 70,165,000

Net Income (Expense) From Fin_3

Net Income (Expense) From Financial Operations (Details) - Schedule of income (expense) from financial operations - CLP ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of income (expense) from financial operations [Abstract]
Net gains on trading derivatives		$ 42,704,000	$ (162,183,000)	$ 38,217,000
Net gains on financial assets at fair value through profit or loss		1,671,000	11,878,000	9,393,000
Net gains on derecognition of financial assets measured at amortized cost		80,679,000	63,672,000	8,479,000
Sale of loans and accounts receivables from customers
Current portfolio		48,000	63,000	(309,000)
Charged-off portfolio		(110,000)	3,248,000	709,000
Repurchase of issued bonds	[1]	(24,973,000)	3,073,000	(1,085,000)
Other income (expense) from financial operations		(9,237,000)	2,084,000	(2,230,000)
Total income (expense)		$ 90,800	$ (78,165,000)	$ 53,174,000
[1]	The Bank repurchased its own bonds, see Note 2 for details.

Net Foreign Exchange Gain (Lo_3

Net Foreign Exchange Gain (Loss) (Details) - Schedule of net foreign exchange income - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net foreign exchange gain (loss)
Net profit (loss) from currency exchange differences	$ 90,133	$ (89,893)	$ (212,618)
Hedging derivatives	(27,624)	362,374	252,275
Income from assets indexed to foreign currency	(3,512)	7,376	12,251
Total	$ 58,997	$ 279,857	$ 51,908

Expected Credit Losses Allowa_3

Expected Credit Losses Allowance (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020CLP ($)
Top of range [member]
Expected Credit Losses Allowance (Details) [Line Items]
Expected credit loss related to macroeconomically scenarios	$ 59,000

Expected Credit Losses Allowa_4

Expected Credit Losses Allowance (Details) - Schedule of expected credit losses - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	[1]	Dec. 31, 2019	Dec. 31, 2018
Expected Credit Losses Allowance (Details) - Schedule of expected credit losses [Line Items]
Commercial loans	$ 290,691		$ (140,245)	$ (142,783)
Mortgage loans	18,273		(14,412)	14,121
Consumer loans	161,576		(169,483)	(189,251)
Contingent loans	5,789		1,008	8
Loans and account receivable at FVOCI	1,253		5	431
Debt at FVOCI	682		(184)	66
Total	478,264		(323,311)	(317,408)
Individual [Member] | Stage 1 [Member]
Expected Credit Losses Allowance (Details) - Schedule of expected credit losses [Line Items]
Commercial loans	20,055		(3,002)	79
Mortgage loans	0
Consumer loans	0
Contingent loans	1,335		45	(90)
Loans and account receivable at FVOCI	1,253		5	363
Debt at FVOCI
Total	22,643		(2,952)	352
Individual [Member] | Stage 2 [Member]
Expected Credit Losses Allowance (Details) - Schedule of expected credit losses [Line Items]
Commercial loans	35,861		(10,469)	(2,891)
Mortgage loans	0
Consumer loans	0
Contingent loans	1,624		10	11
Loans and account receivable at FVOCI				68
Debt at FVOCI
Total	37,485		(10,459)	(2,812)
Individual [Member] | Stage 3 [Member]
Expected Credit Losses Allowance (Details) - Schedule of expected credit losses [Line Items]
Commercial loans	115,730		(79,501)	(96,131)
Mortgage loans	0
Consumer loans	0
Contingent loans	(14)		152	(225)
Loans and account receivable at FVOCI
Debt at FVOCI
Total	115,716		(79,349)	(96,356)
Collective [Member] | Stage 1 [Member]
Expected Credit Losses Allowance (Details) - Schedule of expected credit losses [Line Items]
Commercial loans	9,617		(4,930)	5,652
Mortgage loans	16,603		(1,177)	5,583
Consumer loans	19,024		(8,875)	1,861
Contingent loans	(1,600)		589	1,214
Loans and account receivable at FVOCI
Debt at FVOCI	682		(184)	66
Total	44,326		(14,577)	14,376
Collective [Member] | Stage 2 [Member]
Expected Credit Losses Allowance (Details) - Schedule of expected credit losses [Line Items]
Commercial loans	23,410		(8,686)	(1,533)
Mortgage loans	(5,966)		(4,998)	5,161
Consumer loans	(18,914)		(15,280)	192
Contingent loans	4,023		24	(68)
Loans and account receivable at FVOCI
Debt at FVOCI
Total	2,552		(28,940)	3,752
Collective [Member] | Stage 3 [Member]
Expected Credit Losses Allowance (Details) - Schedule of expected credit losses [Line Items]
Commercial loans	86,018		(33,657)	(47,959)
Mortgage loans	7,636		(8,237)	3,377
Consumer loans	161,466		(145,328)	(191,304)
Contingent loans	423		188	(834)
Loans and account receivable at FVOCI
Debt at FVOCI
Total	$ 255,543		$ (187,034)	$ (236,720)
[1]	Includes overlays for an amount of MCh$59,000. See Note 37, Risk management.

Personnel Salaries and Expens_3

Personnel Salaries and Expenses (Details) - Schedule of personnel expenses - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of personnel expenses [Abstract]
Personnel compensation	$ 265,312	$ 260,445	$ 259,354
Bonuses or gratifications	77,046	78,534	72,728
Stock-based benefits	(1,589)	(315)	(337)
Seniority compensation	22,380	25,006	21,869
Pension plans	1,026	567	1,069
Training expenses	2,887	4,918	3,782
Day care and kindergarten	2,769	2,731	2,778
Welfare funds	6,531	6,644	6,040
Other personnel expenses	32,308	31,627	30,281
Total	$ 408,670	$ 410,157	$ 397,564

Administrative Expenses (Detail

Administrative Expenses (Details) - Schedule of administrative expenses - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of administrative expenses [Abstract]
General administrative expenses	$ 142,848	$ 124,896	$ 145,241
Maintenance and repair of property, plant and equipment	20,300	19,214	20,962
Office lease			29,761
Equipment lease			55
Short term leases contracts	1,625	4,177
Insurance payments	5,064	3,848	3,439
Office supplies	4,774	5,126	5,070
IT and communication expenses	68,436	52,017	44,209
Heating, and other utilities	5,455	2,848	4,849
Security and valuables transport services	12,365	12,187	12,168
Representation and personnel travel expenses	2,375	4,109	3,444
Judicial and notarial expenses	860	1,277	1,148
Fees for technical reports and auditing	8,460	7,643	10,020
Other general administrative expenses	13,134	12,450	10,116
Outsourced services	72,513	71,572	65,358
Data processing	38,032	31,921	32,360
Archive services	2,619	3,518	3,401
Valuation services	3,208	3,644	3,167
Outsourcing	6,177	10,139	9,936
Other	22,477	22,350	16,494
Board expenses	1,517	1,356	1,297
Marketing expenses	16,791	20,891	19,286
Taxes, payroll taxes, and contributions	16,781	14,897	13,907
Real estate taxes	2,214	1,954	1,730
Patents	2,135	1,913	1,896
Other taxes	5	5	7
Contributions to FMC (former SBIF)	12,427	11,025	10,274
Total	$ 250,450	$ 233,612	$ 245,089

Depreciation, Amortization, a_3

Depreciation, Amortization, and Impairment (Details) - Schedule of depreciation, amortization and impairment charges - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Depreciation and amortization
Depreciation of property, plant, and equipment	$ (56,311)	$ (52,855)	$ (54,987)
Amortization of Intangible assets	(25,384)	(26,348)	(24,293)
Depreciation right of use assets	(27,731)	(26,889)
Total depreciation and amortization	(109,426)	(106,092)	(79,280)
Impairment of property, plant, and equipment		(1,013)	(39)
Impairment of right of use assets	(638)	(1,713)
Impairment of intangibles
Total impairment	(638)	(2,726)	(39)
Total	$ (110,064)	$ (108,818)	$ (79,319)

Other Operating Income and Ex_3

Other Operating Income and Expenses (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)
Disclosure of other operating income (expense) [text block] [Abstract]
Income from legal cession of rights	$ 2,122

Other Operating Income and Ex_4

Other Operating Income and Expenses (Details) - Schedule of other operating income - CLP ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of other operating income [Abstract]
Income from assets received in lieu of payment		$ 5,934	$ 5,613	$ 7,106
Release of contingencies provisions	[1]	503		12,020
Other income		1,769	7,388	4,003
Leases				222
Income from sale of property, plant and equipment	[2]	865	2,456	2,490
Compensation from insurance companies due to damages	[3]	702	4,681	144
Other		202	251	1,147
Total		$ 8,206	$ 13,001	$ 23,129
[1]	In accordance with IAS 37, the Bank recorded contingencies provisions, which in 2018 and 2020 were favorable to the Bank.
[2]	Legal cession of rights made by Bansa Santander S.A. which resulted in an income of Ch$2,122 million, as of December 31, 2018.
[3]	Mainly are recoveries from fraud claims.

Other Operating Income and Ex_5

Other Operating Income and Expenses (Details) - Schedule of other operating expenses - CLP ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of other operating expenses [Abstract]
Allowances and expenses for assets received in lieu of payment		$ 2,941	$ 3,900	$ 2,537
Provision on assets received in lieu of payment		1,456	1,828	816
Expenses for maintenance of assets received in lieu of payment		1,485	2,072	1,721
Credit card expenses		546	1,077	3,151
Customer services		1,559	2,456	3,635
Other expenses		72,760	41,870	23,019
Operating charge-offs		10,675	8,349	5,694
Life insurance and general product insurance policies	[1]	32,987	21,205	9,964
Sale of property plant and equipment			67	62
Retail association payment		326	343	898
Sale of participation on associates		20	126
Expense on social commotion event			1,823
Leasing land tax	[2]	3,174
Commercial representation expenses		3,501	256
Non-recurrent expenses		6,622
Other		15,455	9,701	6,401
Total		$ 77,806	$ 49,303	$ 32,342
[1]	New Fraud Law became effective on 2020.
[2]	Annual Land Tax surcharge approved in the Tax Modernization Law of February 24, 2020.

Transactions with Related Par_3

Transactions with Related Parties (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of related party [text block] [Abstract]
Loan with non-controlled companies	$ 2,286	$ 2,059	$ 122,289

Transactions with Related Par_4

Transactions with Related Parties (Details) - Schedule of loans and accounts receivable as well as contingent loans that correspond to related entities - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Companies Of The Group [Member]
Loans and accounts receivable:
Commercial loans	$ 352,590	$ 246,868	$ 122,289
Mortgage loans
Consumer loans
Loans and accounts receivable:	352,590	246,868	122,289
Allowance for loan losses	(1,138)	(122)	(308)
Net loans	351,452	246,746	121,981
Guarantees	3,323	462,513	442,854
Contingent loans:
Personal guarantees
Letters of credit	3,447	4,112	5,392
Guarantees	811	464,691	445,064
Contingent loans:	4,258	468,803	450,456
Allowance for contingent loans	(6)	(835)	(1)
Net contingent loans	4,252	467,968	450,455
Associates [member]
Loans and accounts receivable:
Commercial loans	265	375	459
Mortgage loans
Consumer loans
Loans and accounts receivable:	265	375	459
Allowance for loan losses	(9)	(182)	(9)
Net loans	256	193	450
Guarantees
Contingent loans:
Personal guarantees
Letters of credit
Guarantees
Contingent loans:
Allowance for contingent loans
Net contingent loans
Key management personnel of entity or parent [member]
Loans and accounts receivable:
Commercial loans	3,939	2,986	4,299
Mortgage loans	22,428	20,473	18,814
Consumer loans	6,131	5,781	5,335
Loans and accounts receivable:	32,498	29,240	28,448
Allowance for loan losses	(137)	(179)	(116)
Net loans	32,361	29,061	28,332
Guarantees	27,203	23,918	22,893
Contingent loans:
Personal guarantees
Letters of credit			2,060
Guarantees			3,364
Contingent loans:			5,424
Allowance for contingent loans			(18)
Net contingent loans			5,406
Other related parties [member]
Loans and accounts receivable:
Commercial loans	900	685	233
Mortgage loans
Consumer loans
Loans and accounts receivable:	900	685	233
Allowance for loan losses	(14)	(10)	(5)
Net loans	886	675	228
Guarantees	442	288	7,171
Contingent loans:
Personal guarantees
Letters of credit	93	63	44
Guarantees
Contingent loans:	93	63	44
Allowance for contingent loans
Net contingent loans	$ 93	$ 63	$ 44

Transactions with Related Par_5

Transactions with Related Parties (Details) - Schedule of loan activity to related parties - CLP ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Companies Of The Group [Member]
Transactions with Related Parties (Details) - Schedule of loan activity to related parties [Line Items]
Opening balances	[1]	$ 715,671	$ 572,745	$ 476,906
Loans granted	[1]	388,896	193,798	200,657
Loans payments	[1]	(747,719)	(50,872)	(104,818)
Ending balances	[1]	356,848	715,671	572,745
Associated Companies [Member]
Transactions with Related Parties (Details) - Schedule of loan activity to related parties [Line Items]
Opening balances		375	459	771
Loans granted			167	39
Loans payments		(110)	(251)	(351)
Ending balances		265	375	459
Key Personnel [Member]
Transactions with Related Parties (Details) - Schedule of loan activity to related parties [Line Items]
Opening balances		29,240	33,871	27,051
Loans granted		8,080	4,826	16,574
Loans payments		(4,822)	(9,457)	(9,754)
Ending balances		32,498	29,240	33,871
Other [Member]
Transactions with Related Parties (Details) - Schedule of loan activity to related parties [Line Items]
Opening balances		748	7,899	7,826
Loans granted		727	500	773
Loans payments		(482)	(7,651)	(700)
Ending balances		$ 993	$ 748	$ 7,899
[1]	Loans with non-controlled companies (not-consolidated) amount MCh$2,286, MCh$2,059 and MCh$122,289 as of December 31, 2020, 2019 and 2018, respectively

Transactions with Related Par_6

Transactions with Related Parties (Details) - Schedule of assets and liabilities with related parties - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Companies Of The Group [Member]
Assets
Cash and deposits in banks	$ 703,069	$ 171,816	$ 189,803
Trading investments
Obligations under repurchase agreements Loans
Financial derivative contracts	978,696	2,058,715	748,632
Debt instrument at FVOCI
Other assets	445,609	185,317	38,960
Liabilities
Deposits and other demand liabilities	17,118	25,261	27,515
Obligations under repurchase agreements Loans	961,718	138,498	6,501
Time deposits and other time liabilities	1,409,404	1,183,235	2,585,337
Financial derivative contracts	1,137,502	2,159,660	770,624
Interbank borrowing	544,291
Issued debt instruments	349,002	363,154	335,443
Other financial liabilities		6,231	6,807
Other liabilities	1,210	8,130	60,884
Associated companies [Member]
Assets
Cash and deposits in banks
Trading investments
Obligations under repurchase agreements Loans
Financial derivative contracts	186,038	218,610	105,358
Debt instrument at FVOCI
Other assets	412,277	210,579	51,842
Liabilities
Deposits and other demand liabilities	4,484	93,761	21,577
Obligations under repurchase agreements Loans		5,000
Time deposits and other time liabilities	100	282,171
Financial derivative contracts	354,108	288,013	112,523
Interbank borrowing
Issued debt instruments
Other financial liabilities
Other liabilities	4,484	146,164	89,817
Key personnel [Member]
Assets
Cash and deposits in banks
Trading investments
Obligations under repurchase agreements Loans
Financial derivative contracts	33
Debt instrument at FVOCI
Other assets
Liabilities
Deposits and other demand liabilities	5,997	4,624	2,493
Obligations under repurchase agreements Loans	101	270	329
Time deposits and other time liabilities	4,706	4,246	3,189
Financial derivative contracts
Interbank borrowing
Issued debt instruments
Other financial liabilities
Other liabilities	5,997
Other [Member]
Assets
Cash and deposits in banks
Trading investments
Obligations under repurchase agreements Loans
Financial derivative contracts	7	55	9
Debt instrument at FVOCI
Other assets
Liabilities
Deposits and other demand liabilities	3,242	566	480
Obligations under repurchase agreements Loans		80	68
Time deposits and other time liabilities	864	2,204	838
Financial derivative contracts		3
Interbank borrowing
Issued debt instruments
Other financial liabilities
Other liabilities	$ 3,242

Transactions with Related Par_7

Transactions with Related Parties (Details) - Schedule of income (expense) recorded due to transactions with related parties - CLP ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Companies Of The Group [Member]
Income (expense) recorded
Interest income and inflation-indexation adjustments		$ (30,586)	$ (41,181)	$ (53,256)
Fee and commission income and expenses		46,823	28,274	91,178
Net income (expense) from financial operations and net foreign exchange gain (loss)	[1]	(390,737)	(586,318)	(566,677)
Other operating income and expenses		492	406	42
Key personnel compensation and expenses
Administrative and other expenses		(45,478)	(11,877)	(43,035)
Total		(419,486)	(610,696)	(571,748)
Associated Companies [Member]
Income (expense) recorded
Interest income and inflation-indexation adjustments		21	(5,235)	(156)
Fee and commission income and expenses		22,596	14,499	7,826
Net income (expense) from financial operations and net foreign exchange gain (loss)	[1]	240,565	(84,236)	65,727
Other operating income and expenses		(522)	(2,026)	1,388
Key personnel compensation and expenses
Administrative and other expenses		(16,763)	(47,757)	(50,764)
Total		245,897	(124,755)	24,021
Key Personnel [Member]
Income (expense) recorded
Interest income and inflation-indexation adjustments		1,202	1,151	1,252
Fee and commission income and expenses		152	232	305
Net income (expense) from financial operations and net foreign exchange gain (loss)	[1]			27
Other operating income and expenses
Key personnel compensation and expenses		(31,961)	(37,377)	(40,683)
Administrative and other expenses
Total		(30,607)	(35,994)	(39,099)
Other related parties [member]
Income (expense) recorded
Interest income and inflation-indexation adjustments		10	26	508
Fee and commission income and expenses		24	28	22
Net income (expense) from financial operations and net foreign exchange gain (loss)	[1]			(12)
Other operating income and expenses
Key personnel compensation and expenses
Administrative and other expenses
Total		$ 34	$ 54	$ 518
[1]	Primarily relates to derivative contracts used to financially cover exchange risk of assets and liabilities that cover positions of the Bank and its subsidiaries,

Transactions with Related Par_8

Transactions with Related Parties (Details) - Schedule of payments to Board members and key management personnel - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of payments to Board members and key management personnel [Abstract]
Personnel compensation	$ 16,220	$ 16,264	$ 16,924
Board members' salaries and expenses	1,452	1,358	1,230
Bonuses or gratifications	12,583	16,104	16,243
Stock-based benefits	(1,589)	(315)	(337)
Seniority compensation	1,079	2,378	4,202
Pension plans	1,026	567	1,069
Training expenses	87	37	210
Health funds	276	273	284
Other personnel expenses	827	711	858
Total	$ 31,961	$ 37,377	$ 40,683

Transactions with Related Par_9

Transactions with Related Parties (Details) - Schedule of composition of key personnel	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Transactions with Related Parties (Details) - Schedule of composition of key personnel [Line Items]
No. of executives	120	128	131
Director [Member]
Transactions with Related Parties (Details) - Schedule of composition of key personnel [Line Items]
No. of executives	11	10	11
Division Manager [Member]
Transactions with Related Parties (Details) - Schedule of composition of key personnel [Line Items]
No. of executives	13	12	12
Manager [Member]
Transactions with Related Parties (Details) - Schedule of composition of key personnel [Line Items]
No. of executives	96	106	108

Pension Plans (Details)

Pension Plans (Details) - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of employee benefits [text block] [Abstract]
Plan assets	$ 8,224	$ 7,195

Pension Plans (Details) - Sched

Pension Plans (Details) - Schedule of actuarial hypothesis assumptions - Other post-employment benefit plans [Member]	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Pension Plans (Details) - Schedule of actuarial hypothesis assumptions [Line Items]
Mortality chart	RV-2014	RV-2014
Termination of contract rates	50.00%	50.00%
Impairment chart	PDT 1985	PDT 1985

Pension Plans (Details) - Sch_2

Pension Plans (Details) - Schedule of post-employment benefits - Other post-employment benefit plans [Member] - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension Plans (Details) - Schedule of post-employment benefits [Line Items]
Plan assets	$ 8,224	$ 7,195	$ 6,804	$ 7,919
For active personnel	(7,551)	(6,525)
Incurred by inactive personnel
Unrealized actuarial (gain) losses
Balances at year end	$ 673	$ 670	$ 846

Pension Plans (Details) - Sch_3

Pension Plans (Details) - Schedule of cash flow for post-employment benefits - Other post-employment benefit plans [Member] - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
a) Fair value of plan assets
Opening balance	$ 7,195	$ 6,804	$ 7,919
Expected yield of insurance contracts	385	333	353
Employer contributions	870	859	836
Actuarial (gain) losses
Premiums paid
Benefits paid	(226)	(801)	(2,304)
Fair value of plan assets at year end	8,224	7,195	6,804
b) Present value of obligations
Present value of obligations opening balance	(6,525)	(5,958)	(6,998)
Net incorporation of Group companies
Service cost	(1,026)	(567)	(1,069)
Interest cost
Curtailment/settlement effect
Benefits paid
Past service cost
Actuarial (gain) losses
Other			2,109
Present value of obligations at year end	(7,551)	(6,525)	(5,958)
Net balance at year end	$ 673	$ 670	$ 846

Pension Plans (Details) - Sch_4

Pension Plans (Details) - Schedule of plan expected profit	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of plan expected profit [Abstract]
Type of expected yield from the plan’s assets	UF + 2,50% annual	UF + 2,50% annual	UF + 2,50% annual
Type of yield expected from the reimbursement rights	UF + 2,50% annual	UF + 2,50% annual	UF + 2,50% annual

Pension Plans (Details) - Sch_5

Pension Plans (Details) - Schedule of plan associated expenses - Other post-employment benefit plans [Member] - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Plans (Details) - Schedule of plan associated expenses [Line Items]
Current period service expenses	$ 1,026	$ 566	$ 1,069
Interest cost
Expected yield from plan’s assets	(385)	(333)	(353)
Extraordinary allocations
Actuarial (gain)/ losses recorded in the period
Past service cost
Other
Total	$ 641	$ 233	$ 716

Fair Value of Financial Asset_3

Fair Value of Financial Assets and Liabilities (Details) - Derivative Contract Guarantees [Member]	12 Months Ended
	Dec. 31, 2020CLP ($)
Fair Value of Financial Assets and Liabilities (Details) [Line Items]
Derivatives contract guarantees	$ 191,802,000,000
Derivatives contract guarantees	$ 96,263

Fair Value of Financial Asset_4

Fair Value of Financial Assets and Liabilities (Details) - Schedule of financial assets and liabilities - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Assets
Financial Assets, Fair value	$ 7,062,407	$ 3,981,088
Deposits and interbank borrowings [Member]
Liabilities
Financial Liabilities	31,471,283	26,010,067
Financial Liabilities, Fair value	32,047,227	26,200,921
Financial derivative contracts [Member]
Liabilities
Financial Liabilities	9,018,660	7,390,654
Financial Liabilities, Fair value	9,018,660	7,390,654
Issued debt instruments and other financial liabilities [Member]
Liabilities
Financial Liabilities	8,388,495	9,727,081
Financial Liabilities, Fair value	9,590,678	10,718,997
Guarantees received (margin accounts) [Member]
Liabilities
Financial Liabilities	624,205	994,714
Financial Liabilities, Fair value	624,205	994,714
Financial derivative contracts [Member]
Assets
Financial Assets	133,718	8,148,608
Financial Assets, Fair value	133,718	8,148,608
Financial Assets Held For Trading [Member]
Assets
Financial Assets		270,204
Financial Assets, Fair value	9,032,085	270,204
Loans And Accounts Receivable At Amortized Cost [Member]
Assets
Financial Assets	33,303,100	31,775,420
Financial Assets, Fair value	36,921,368	34,602,793
Loans and accounts receivable at FVOCI, net [Member]
Assets
Financial Assets	69,331	66,065
Financial Assets, Fair value	69,331	66,065
Debt Instrument At FVOCI [Member]
Assets
Financial Assets	7,162,542	4,010,272
Financial Assets, Fair value	7,162,542	4,010,272
Guarantee Deposits (Margin Accounts) [Member]
Assets
Financial Assets	608,359	314,616
Financial Assets, Fair value	$ 608,359	$ 314,616

Fair Value of Financial Asset_5

Fair Value of Financial Assets and Liabilities (Details) - Schedule of assets and liabilities on recurrent basis - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets
Assets	$ 17,006,035	$ 12,809,765
Liabilities
Liabilities	9,642,865	8,385,368
Level 1 [Member]
Assets
Assets	7,277,531	4,262,625
Liabilities
Liabilities
Level 2 [Member]
Assets
Assets	9,651,046	8,465,462
Liabilities
Liabilities	9,640,105	8,382,418
Level 3 [Member]
Assets
Assets	77,458	81,678
Liabilities
Liabilities	2,760	2,950	$ 795
Derivatives [Member]
Liabilities
Liabilities	9,018,660	7,390,654
Derivatives [Member] | Level 1 [Member]
Liabilities
Liabilities
Derivatives [Member] | Level 2 [Member]
Liabilities
Liabilities	9,015,900	7,387,704
Derivatives [Member] | Level 3 [Member]
Liabilities
Liabilities	2,760	2,950
Guarantees received (margin accounts) [Member]
Liabilities
Liabilities	624,205	994,714
Guarantees received (margin accounts) [Member] | Level 1 [Member]
Liabilities
Liabilities
Guarantees received (margin accounts) [Member] | Level 2 [Member]
Liabilities
Liabilities	624,205	994,714
Guarantees received (margin accounts) [Member] | Level 3 [Member]
Liabilities
Liabilities
Financial Assets Held For Trading [Member]
Assets
Assets	133,718	270,204
Financial Assets Held For Trading [Member] | Level 1 [Member]
Assets
Assets	132,246	270,204
Financial Assets Held For Trading [Member] | Level 2 [Member]
Assets
Assets	1,472
Financial Assets Held For Trading [Member] | Level 3 [Member]
Assets
Assets
Loans and accounts receivable at FVOCI, net [Member]
Assets
Assets	69,331	66,065
Loans and accounts receivable at FVOCI, net [Member] | Level 1 [Member]
Assets
Assets
Loans and accounts receivable at FVOCI, net [Member] | Level 2 [Member]
Assets
Assets
Loans and accounts receivable at FVOCI, net [Member] | Level 3 [Member]
Assets
Assets	69,331	66,065
Debt Instruments At FVOCI [Member]
Assets
Assets	7,162,542	4,010,272
Debt Instruments At FVOCI [Member] | Level 1 [Member]
Assets
Assets	7,145,285	3,992,421
Debt Instruments At FVOCI [Member] | Level 2 [Member]
Assets
Assets	16,731	17,146
Debt Instruments At FVOCI [Member] | Level 3 [Member]
Assets
Assets	526	705
Derivatives [Member]
Assets
Assets	9,032,085	8,148,608
Derivatives [Member] | Level 1 [Member]
Assets
Assets
Derivatives [Member] | Level 2 [Member]
Assets
Assets	9,024,484	8,133,700
Derivatives [Member] | Level 3 [Member]
Assets
Assets	7,601	14,908
Guarantees received (margin accounts) [Member]
Assets
Assets	608,359	314,616
Guarantees received (margin accounts) [Member] | Level 1 [Member]
Assets
Assets
Guarantees received (margin accounts) [Member] | Level 2 [Member]
Assets
Assets	608,359	314,616
Guarantees received (margin accounts) [Member] | Level 3 [Member]
Assets
Assets

Fair Value of Financial Asset_6

Fair Value of Financial Assets and Liabilities (Details) - Schedule of assets or liabilities which are not measured at fair value - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Assets
Financial Assets, Fair value	$ 7,062,407	$ 3,981,088
Total	36,921,368	34,602,793
Liabilities
Total	41,637,905	36,919,918
Deposits and interbank borrowings [Member]
Liabilities
Financial Liabilities, Fair value	32,047,227	26,200,921
Issued debt instruments and other financial liabilities [Member]
Liabilities
Financial Liabilities, Fair value	9,590,678	10,718,997
Loans And Accounts Receivable At Amortized Cost [Member]
Assets
Financial Assets, Fair value	36,921,368	34,602,793
Level 1 [Member]
Assets
Total
Liabilities
Total
Level 1 [Member] | Deposits and interbank borrowings [Member]
Liabilities
Financial Liabilities, Fair value
Level 1 [Member] | Issued debt instruments and other financial liabilities [Member]
Liabilities
Financial Liabilities, Fair value
Level 1 [Member] | Loans And Accounts Receivable At Amortized Cost [Member]
Assets
Financial Assets, Fair value
Level 2 [Member]
Assets
Total
Liabilities
Total	27,077,012	26,622,486
Level 2 [Member] | Deposits and interbank borrowings [Member]
Liabilities
Financial Liabilities, Fair value	17,486,334	15,903,489
Level 2 [Member] | Issued debt instruments and other financial liabilities [Member]
Liabilities
Financial Liabilities, Fair value	9,590,678	10,718,997
Level 2 [Member] | Loans And Accounts Receivable At Amortized Cost [Member]
Assets
Financial Assets, Fair value
Level 3 [Member]
Assets
Total	36,921,368	34,602,793
Liabilities
Total	14,560,893	10,297,432
Level 3 [Member] | Deposits and interbank borrowings [Member]
Liabilities
Financial Liabilities, Fair value	14,560,893	10,297,432
Level 3 [Member] | Issued debt instruments and other financial liabilities [Member]
Liabilities
Financial Liabilities, Fair value
Level 3 [Member] | Loans And Accounts Receivable At Amortized Cost [Member]
Assets
Financial Assets, Fair value	$ 36,921,368	$ 34,602,793

Fair Value of Financial Asset_7

Fair Value of Financial Assets and Liabilities (Details) - Schedule of financial instruments classified as Level 3 - Level 3 [Member] - CLP ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Present Value Method [Member] | Financial Derivative Contracts [Member]
Fair Value of Financial Assets and Liabilities (Details) - Schedule of financial instruments classified as Level 3 [Line Items]
Main unobservabe inputs	[1]	Curves on TAB	Curves on TAB
Impact Sens. -1bp Unfavourable scenario		$ (1.3)	$ (2.3)
Impact Sens. +1bp Favourable scenario		$ (1.3)	$ 2.3
Internal Rate Of Return Method [Member] | Debt Instrument At FVOCI [Member]
Fair Value of Financial Assets and Liabilities (Details) - Schedule of financial instruments classified as Level 3 [Line Items]
Main unobservabe inputs	[2]	BR UF	BR UF
Impact Sens. -1bp Unfavourable scenario
Impact Sens. +1bp Favourable scenario
[1]	TAB: “Tasa Activa Bancaria” (Active Bank Rate). Average interest rates on 30, 90, 180 and 360 day deposits published by the Chilean Association of Banks and Financial Institutions (ABIF) in nominal currency (Chilean peso) and in real terms, adjusted for inflation (in Chilean unit of account (Unidad de Fomento - UF)).
[2]	BR: “Bonos de Reconocimiento” (Recognition Bonds). The Recognition Bond is an instrument of money provided by the State of Chile to workers who joined the new pension system, which began operating since 1981.

Fair Value of Financial Asset_8

Fair Value of Financial Assets and Liabilities (Details) - Schedule of assets and liabilities measured at fair value on a recurrent basis using unobserved significant entries (Level 3) - Level 3 [Member] - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Fair Value of Financial Assets and Liabilities (Details) - Schedule of assets and liabilities measured at fair value on a recurrent basis using unobserved significant entries (Level 3) [Line Items]
Balance	$ 81,678	$ 80,781
Balance	2,950	795
Total realized and unrealized profits (losses)
Included in statements of income	(196)	827
Included in statements of income	1,012	2,155
Included in other comprehensive income	3,087	70
Included in other comprehensive income
Purchases, issuances, and loans (net)
Purchases, issuances, and loans (net)
Level transfer	(7,111)
Level transfer	(1,202)
Balance	77,458	81,678
Balance	2,760	2,950
Total profits or losses included in comprehensive income that are attributable to change in unrealized profit (losses) related to assets or liabilities	(4,220)	897
Total profits or losses included in comprehensive income that are attributable to change in unrealized profit (losses) related to assets or liabilities	$ (190)	$ 2,155

Fair Value of Financial Asset_9

Fair Value of Financial Assets and Liabilities (Details) - Schedule of financial instruments subject to compensation - CLP ($) $ in Millions	Dec. 31, 2020		Dec. 31, 2019
Fair Value of Financial Assets and Liabilities (Details) - Schedule of financial instruments subject to compensation [Line Items]
Gross amounts			$ 8,214,216
Compensated in balance
Net amount presented in balance			8,148,151
Remains of unrelated and / or unencumbered financial instruments	33,494,749		31,841,942
Amount in Statements of Financial Position	42,335,185		39,990,093
Gross amounts	9,891,887		7,768,200
Compensated in balance
Net amount presented in balance	9,891,887		7,768,200
Remains of unrelated and / or unencumbered financial instruments	31,567,864		26,012,576
Amount in Statements of Financial Position	41,459,751		33,780,776
Investments under resale agreements [Member]
Fair Value of Financial Assets and Liabilities (Details) - Schedule of financial instruments subject to compensation [Line Items]
Gross amounts
Compensated in balance
Net amount presented in balance
Gross amounts	969,808		380,055
Compensated in balance
Net amount presented in balance	969,808		380,055
Remains of unrelated and / or unencumbered financial instruments
Amount in Statements of Financial Position	969,808		380,055
Financial derivative contracts [Member]
Fair Value of Financial Assets and Liabilities (Details) - Schedule of financial instruments subject to compensation [Line Items]
Gross amounts	8,922,079	[1]	7,388,145
Compensated in balance		[1]
Net amount presented in balance	8,922,079	[1]	7,388,145
Remains of unrelated and / or unencumbered financial instruments	96,581	[1]	2,509
Amount in Statements of Financial Position	9,018,660	[1]	7,390,654
Loans And Accounts Receivable At Amortized Cost [Member]
Fair Value of Financial Assets and Liabilities (Details) - Schedule of financial instruments subject to compensation [Line Items]
Gross amounts
Compensated in balance
Net amount presented in balance
Remains of unrelated and / or unencumbered financial instruments	31,471,283
Amount in Statements of Financial Position	31,471,283
Deposits and interbank borrowings [Member]
Fair Value of Financial Assets and Liabilities (Details) - Schedule of financial instruments subject to compensation [Line Items]
Gross amounts
Compensated in balance
Net amount presented in balance
Remains of unrelated and / or unencumbered financial instruments			26,010,067
Amount in Statements of Financial Position			26,010,067
Financial derivative contracts [Member]
Fair Value of Financial Assets and Liabilities (Details) - Schedule of financial instruments subject to compensation [Line Items]
Gross amounts		[1]	8,148,151
Compensated in balance		[1]
Net amount presented in balance		[1]	8,148,151
Remains of unrelated and / or unencumbered financial instruments	191,649	[1]	457
Amount in Statements of Financial Position	9,032,085	[1]	8,148,608
Loans And Accounts Receivable At Amortized Cost [Member]
Fair Value of Financial Assets and Liabilities (Details) - Schedule of financial instruments subject to compensation [Line Items]
Gross amounts
Compensated in balance
Net amount presented in balance
Remains of unrelated and / or unencumbered financial instruments			31,775,420
Amount in Statements of Financial Position			31,775,420
Loans and accounts receivable at FVOCI, net [Member]
Fair Value of Financial Assets and Liabilities (Details) - Schedule of financial instruments subject to compensation [Line Items]
Gross amounts			66,065
Compensated in balance
Net amount presented in balance
Remains of unrelated and / or unencumbered financial instruments	33,303,100		66,065
Amount in Statements of Financial Position	$ 33,303,100		66,065
Investments under resale agreements [Member]
Fair Value of Financial Assets and Liabilities (Details) - Schedule of financial instruments subject to compensation [Line Items]
Gross amounts
Compensated in balance
Net amount presented in balance
Remains of unrelated and / or unencumbered financial instruments
Amount in Statements of Financial Position
[1]	Derivatives contract have guarantees associated for Ch$191,802 million and Ch$96,263, respectively.

Fair Value of Financial Asse_10

Fair Value of Financial Assets and Liabilities (Details) - Schedule of credit exposure in its financial derivative operations - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Fair Value of Financial Assets and Liabilities (Details) - Schedule of credit exposure in its financial derivative operations [Line Items]
Assets	$ 9,302,085	$ 8,148,607
Liability	9,018,660	7,390,654
Financial derivative contracts with collateral agreement threshold equal to zero [Member]
Fair Value of Financial Assets and Liabilities (Details) - Schedule of credit exposure in its financial derivative operations [Line Items]
Assets	8,127,263	7,478,837
Liability	7,900,539	6,748,219
Financial derivative contracts with non-zero threshold collateral agreement [Member]
Fair Value of Financial Assets and Liabilities (Details) - Schedule of credit exposure in its financial derivative operations [Line Items]
Assets	471,529	532,298
Liability	606,661	517,814
Financial derivative contracts without collateral agreement [Member]
Fair Value of Financial Assets and Liabilities (Details) - Schedule of credit exposure in its financial derivative operations [Line Items]
Assets	433,293	137,472
Liability	$ 511,460	$ 124,621

Risk Management (Details)

Risk Management (Details) $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2020CLP ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019CLP ($)	Dec. 31, 2020USD ($)
Risk Management (Details) [Line Items]
Market risk trading portfolio, description	For the Bank, the VaR estimate is made under the historical simulation methodology, which consists of observing the behavior of the profits and losses that would have occurred in the current portfolio if the market conditions for a given historical period had been in force, in order to infer the maximum loss on the basis of that information, with a given degree of confidence. The methodology has the advantage of precisely reflecting the historical distribution of the market variables and not requiring any assumptions regarding the distribution of specific probabilities. All the VaR measures are intended to determine the distribution function for a change in the value of a given portfolio, and once that distribution is known, to calculate the percentile related to the necessary degree of confidence, which will be equal to the value at risk by virtue of those parameters. As calculated by the Bank, the VaR is an estimate of the maximum expected loss of market value for a given portfolio over a 1–day horizon, with a 99.00% confidence level. It is the maximum 1–day loss that the Bank could expect to experience in a given portfolio, with a 99.00% confidence level. In other words, it is the loss that the Bank would expect to experience only 1.0% of the time. The VaR provides a single estimate of market risk which is not comparable from one market risk to another. Returns are calculated through the use of a 2–year time window or at least 520 data points obtained since the last reference date for calculation of the VaR going backward in time.	For the Bank, the VaR estimate is made under the historical simulation methodology, which consists of observing the behavior of the profits and losses that would have occurred in the current portfolio if the market conditions for a given historical period had been in force, in order to infer the maximum loss on the basis of that information, with a given degree of confidence. The methodology has the advantage of precisely reflecting the historical distribution of the market variables and not requiring any assumptions regarding the distribution of specific probabilities. All the VaR measures are intended to determine the distribution function for a change in the value of a given portfolio, and once that distribution is known, to calculate the percentile related to the necessary degree of confidence, which will be equal to the value at risk by virtue of those parameters. As calculated by the Bank, the VaR is an estimate of the maximum expected loss of market value for a given portfolio over a 1–day horizon, with a 99.00% confidence level. It is the maximum 1–day loss that the Bank could expect to experience in a given portfolio, with a 99.00% confidence level. In other words, it is the loss that the Bank would expect to experience only 1.0% of the time. The VaR provides a single estimate of market risk which is not comparable from one market risk to another. Returns are calculated through the use of a 2–year time window or at least 520 data points obtained since the last reference date for calculation of the VaR going backward in time.
Trading portfolio (in Dollars)		$ 2,620
Capital and reserves	$ 2,343,580		$ 2,122,742	$ 89,100
Corporate and Investment Banking segment	100.00%	100.00%
Individual basis commercial loans, description	Additionally, with current COVID-19 infection rates having increased and continued high levels of uncertainty in the macro-economic outlook and to address a potential lag in defaults the Bank’s management have determined to record overlay or post-model adjustments for an amount of MCh$59,000, wherein MCh$29,000 addressed macroeconomics’ variables and MCh$30,000 associated to expected behavior of Fogape loans.	Additionally, with current COVID-19 infection rates having increased and continued high levels of uncertainty in the macro-economic outlook and to address a potential lag in defaults the Bank’s management have determined to record overlay or post-model adjustments for an amount of MCh$59,000, wherein MCh$29,000 addressed macroeconomics’ variables and MCh$30,000 associated to expected behavior of Fogape loans.
Smaller commercial loans	$ 400	$ 240,000,000
Holidays Payment	121,850
Lieu of payment	31,447		38,890
Lieu of payment, gross	32,643		40,932
Lieu of payment, allowance	$ 1,196		$ 42
Liquidity, description	In response to the COVID-19 pandemic, the Chilean Central Bank has made two lines of credit available to banks to reinforce their liquidity, amounting to a total of US$24 billion for the whole banking system. These lines of credit bear interest at the Central Bank’s monetary policy rate (MPR), which was 0.5% as of December 31, 2020. Pursuant to these lines of credit, a bank may borrow up to 3% of the aggregate amount of its consumer and commercial loan portfolios as of February 29, 2020 and may borrow up to an additional 12% if it uses the funds to provide loans to companies and individuals. The first line of credit is a facility available conditionally on loan growth (the “FCIC”) to ensure that banks continue to finance households and businesses in Chile. Loans provided by this line of credit may have maturities of up to 4 years and must be secured by government bonds, corporate bonds or highly rated large commercial loans as collateral. Loans provided under the second line of credit, the LCL, are unsecured and may have maturities of up to 2 years. In addition, borrowings by a bank under the LCL are limited to the aggregate amount of the liquidity reserve requirements of such bank. Ultimately, these lines of credit are intended to ensure banks have ample liquidity to enable them to continue financing SMEs and Middle-market companies. As of December 31, 2020, we had borrowed Ch$4,959,260 billion (US$7 billion) under these lines of credit.	In response to the COVID-19 pandemic, the Chilean Central Bank has made two lines of credit available to banks to reinforce their liquidity, amounting to a total of US$24 billion for the whole banking system. These lines of credit bear interest at the Central Bank’s monetary policy rate (MPR), which was 0.5% as of December 31, 2020. Pursuant to these lines of credit, a bank may borrow up to 3% of the aggregate amount of its consumer and commercial loan portfolios as of February 29, 2020 and may borrow up to an additional 12% if it uses the funds to provide loans to companies and individuals. The first line of credit is a facility available conditionally on loan growth (the “FCIC”) to ensure that banks continue to finance households and businesses in Chile. Loans provided by this line of credit may have maturities of up to 4 years and must be secured by government bonds, corporate bonds or highly rated large commercial loans as collateral. Loans provided under the second line of credit, the LCL, are unsecured and may have maturities of up to 2 years. In addition, borrowings by a bank under the LCL are limited to the aggregate amount of the liquidity reserve requirements of such bank. Ultimately, these lines of credit are intended to ensure banks have ample liquidity to enable them to continue financing SMEs and Middle-market companies. As of December 31, 2020, we had borrowed Ch$4,959,260 billion (US$7 billion) under these lines of credit.
Capital adequacy requirement, description			Chilean banks are required by the General Banking Law to maintain regulatory capital of at least 8% of risk-weighted assets, net of required loan loss allowance and deductions, and paid-in capital and reserves (“basic capital”) of at least 3% of total assets, net of required loan loss allowances. Regulatory capital and basic capital are calculated based on the consolidated financial statements prepared in accordance with the Compendium of Accounting Standards issued by the FMC (formerly the SBIF) the Chilean regulatory agency. As we are the result of the merger between two predecessors with a relevant market share in the Chilean market, we are currently required to maintain a minimum regulatory capital to risk-weighted assets ratio of 11%. As of December 31, 2020, the ratio of our regulatory capital to risk-weighted assets, net of loan loss allowance and deductions, was 15.37% and our core capital ratio was 6.69%. Regulatory capital is defined as the aggregate of: ●a bank’s paid-in capital and reserves, excluding capital attributable to subsidiaries and foreign branches or basic capital; ●its subordinated bonds, valued at their placement price (but decreasing by 20,0% for each year during the period commencing six years prior to maturity), for an amount up to 50,0% of its basic capital; and ●its voluntary allowances for loan losses for an amount of up to 1,25% of risk weighted-assets,
CLF [Member]
Risk Management (Details) [Line Items]
Capital and reserves	$ 63,500
Debt additional allowance	2,066
Post-model adjustments for amount	$ 59,000

Risk Management (Details) - Sch

Risk Management (Details) - Schedule of high, low and average levels - Market Risk [Member] - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Consolidated [member] | Top of Range [Member]
Risk Management (Details) - Schedule of high, low and average levels [Line Items]
Value at risk	$ 12,820	$ 15,780
Consolidated [member] | Bottom of Range [Member]
Risk Management (Details) - Schedule of high, low and average levels [Line Items]
Value at risk	1,940	1,330
Consolidated [member] | Weighted Average [Member]
Risk Management (Details) - Schedule of high, low and average levels [Line Items]
Value at risk	4,450	3,060
Fixed-Income Investments [Member] | Top of Range [Member]
Risk Management (Details) - Schedule of high, low and average levels [Line Items]
Value at risk	11,960	9,770
Fixed-Income Investments [Member] | Bottom of Range [Member]
Risk Management (Details) - Schedule of high, low and average levels [Line Items]
Value at risk	1,500	1,180
Fixed-Income Investments [Member] | Weighted Average [Member]
Risk Management (Details) - Schedule of high, low and average levels [Line Items]
Value at risk	3,190	2,330
Variable-Income Investments [Member] | Top of Range [Member]
Risk Management (Details) - Schedule of high, low and average levels [Line Items]
Value at risk	10
Variable-Income Investments [Member] | Bottom of Range [Member]
Risk Management (Details) - Schedule of high, low and average levels [Line Items]
Value at risk		10
Variable-Income Investments [Member] | Weighted Average [Member]
Risk Management (Details) - Schedule of high, low and average levels [Line Items]
Value at risk
Foreign Currency Investments [Member] | Top of Range [Member]
Risk Management (Details) - Schedule of high, low and average levels [Line Items]
Value at risk	6,470	6,050
Foreign Currency Investments [Member] | Bottom of Range [Member]
Risk Management (Details) - Schedule of high, low and average levels [Line Items]
Value at risk	710	100
Foreign Currency Investments [Member] | Weighted Average [Member]
Risk Management (Details) - Schedule of high, low and average levels [Line Items]
Value at risk	$ 2,850	$ 1,600

Risk Management (Details) - S_2

Risk Management (Details) - Schedule of market risk $ in Thousands, $ in Millions	Dec. 31, 2020CLP ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019CLP ($)	Dec. 31, 2019USD ($)
Loss Limit [Member] | Financial management portfolio - local currency [Member]
Financial management portfolio – local currency (MCh$)
Effect on financial income	$ 100,000		$ 100,000
Effect on capital	329,275		275,000
Financial management portfolio – foreign currency (Th$US)
Effect on financial income (in Dollars)	100,000		100,000
Effect on capital (in Dollars)	329,275		275,000
Loss Limit [Member] | Financial management portfolio - foreign currency [Member]
Financial management portfolio – local currency (MCh$)
Effect on financial income		$ 32		$ 30
Effect on capital		53		75
Financial management portfolio – foreign currency (Th$US)
Effect on financial income (in Dollars)		32		30
Effect on capital (in Dollars)		53		75
Loss Limit [Member] | Financial management portfolio - consolidated [Member]
Financial management portfolio – local currency (MCh$)
Effect on financial income	100,000		100,000
Effect on capital	329,275		275,000
Financial management portfolio – foreign currency (Th$US)
Effect on financial income (in Dollars)	100,000		100,000
Effect on capital (in Dollars)	329,275		275,000
High [Member] | Financial management portfolio - local currency [Member]
Financial management portfolio – local currency (MCh$)
Effect on financial income	66,504		32,719
Effect on capital	302,263		273,473
Financial management portfolio – foreign currency (Th$US)
Effect on financial income (in Dollars)	66,504		32,719
Effect on capital (in Dollars)	302,263		273,473
High [Member] | Financial management portfolio - foreign currency [Member]
Financial management portfolio – local currency (MCh$)
Effect on financial income		19		20
Effect on capital		47		35
Financial management portfolio – foreign currency (Th$US)
Effect on financial income (in Dollars)		19		20
Effect on capital (in Dollars)		47		35
High [Member] | Financial management portfolio - consolidated [Member]
Financial management portfolio – local currency (MCh$)
Effect on financial income	67,584		34,462
Effect on capital	286,436		271,989
Financial management portfolio – foreign currency (Th$US)
Effect on financial income (in Dollars)	67,584		34,462
Effect on capital (in Dollars)	286,436		271,989
Low [Member] | Financial management portfolio - local currency [Member]
Financial management portfolio – local currency (MCh$)
Effect on financial income	26,492		12,686
Effect on capital	214,596		145,338
Financial management portfolio – foreign currency (Th$US)
Effect on financial income (in Dollars)	26,492		12,686
Effect on capital (in Dollars)	214,596		145,338
Low [Member] | Financial management portfolio - foreign currency [Member]
Financial management portfolio – local currency (MCh$)
Effect on financial income		2		5
Effect on capital		12		1
Financial management portfolio – foreign currency (Th$US)
Effect on financial income (in Dollars)		2		5
Effect on capital (in Dollars)		12		1
Low [Member] | Financial management portfolio - consolidated [Member]
Financial management portfolio – local currency (MCh$)
Effect on financial income	25,111		15,236
Effect on capital	210,706		143,836
Financial management portfolio – foreign currency (Th$US)
Effect on financial income (in Dollars)	25,111		15,236
Effect on capital (in Dollars)	210,706		143,836
Average [Member] | Financial management portfolio - local currency [Member]
Financial management portfolio – local currency (MCh$)
Effect on financial income	45,380		24,719
Effect on capital	255,070		228,772
Financial management portfolio – foreign currency (Th$US)
Effect on financial income (in Dollars)	45,380		24,719
Effect on capital (in Dollars)	255,070		228,772
Average [Member] | Financial management portfolio - foreign currency [Member]
Financial management portfolio – local currency (MCh$)
Effect on financial income		5		12
Effect on capital		33		12
Financial management portfolio – foreign currency (Th$US)
Effect on financial income (in Dollars)		5		12
Effect on capital (in Dollars)		$ 33		$ 12
Average [Member] | Financial management portfolio - consolidated [Member]
Financial management portfolio – local currency (MCh$)
Effect on financial income	46,044		27,918
Effect on capital	246,292		227,303
Financial management portfolio – foreign currency (Th$US)
Effect on financial income (in Dollars)	46,044		27,918
Effect on capital (in Dollars)	$ 246,292		$ 227,303

Risk Management (Details) - S_3

Risk Management (Details) - Schedule of exposures of financial assets and liabilities impacted by IBOR reform $ in Millions	Dec. 31, 2020CLP ($)
Schedule of exposures of financial assets and liabilities impacted by IBOR reform [Abstract]
Loans and advances	$ 362,331
Deposits	582,979
Debt instruments	200,301
Financial derivative contracts, assets	614,035
Financial derivative contracts, liabilities	$ 483,789

Risk Management (Details) - S_4

Risk Management (Details) - Schedule of quality assets and its related provision - Credit Risk [Member] - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Individual [Member] | Commerical Loans [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 11,884,580	$ 11,369,454
Total Individual, Percentage	34.61%	34.80%
Total ECL Allowance	$ 366,546	$ 248,095
Total ECL Allowance, Percentage	35.35%	27.69%
Individual [Member] | Commerical Loans [Member] | A1 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 45,862	$ 99,042
Total Individual, Percentage	0.13%	0.30%
Total ECL Allowance	$ 3	$ 2
Total ECL Allowance, Percentage	0.00%	0.00%
Individual [Member] | Commerical Loans [Member] | A2 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 1,098,771	$ 907,696
Total Individual, Percentage	3.20%	2.78%
Total ECL Allowance	$ 954	$ 443
Total ECL Allowance, Percentage	0.09%	0.05%
Individual [Member] | Commerical Loans [Member] | A3 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 1,883,138	$ 2,419,051
Total Individual, Percentage	5.48%	7.41%
Total ECL Allowance	$ 3,657	$ 2,617
Total ECL Allowance, Percentage	0.35%	0.29%
Individual [Member] | Commerical Loans [Member] | A4 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 2,675,322	$ 3,269,855
Total Individual, Percentage	7.79%	10.01%
Total ECL Allowance	$ 7,935	$ 4,421
Total ECL Allowance, Percentage	0.77%	0.49%
Individual [Member] | Commerical Loans [Member] | A5 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 2,703,321	$ 2,210,880
Total Individual, Percentage	7.87%	6.77%
Total ECL Allowance	$ 16,194	$ 8,133
Total ECL Allowance, Percentage	1.56%	0.91%
Individual [Member] | Commerical Loans [Member] | A6 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 1,877,923	$ 1,134,045
Total Individual, Percentage	5.47%	3.47%
Total ECL Allowance	$ 30,604	$ 8,079
Total ECL Allowance, Percentage	2.95%	0.90%
Individual [Member] | Commerical Loans [Member] | B1 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 715,348	$ 603,201
Total Individual, Percentage	2.08%	1.85%
Total ECL Allowance	$ 25,679	$ 12,641
Total ECL Allowance, Percentage	2.48%	1.41%
Individual [Member] | Commerical Loans [Member] | B2 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 161,472	$ 83,341
Total Individual, Percentage	0.47%	0.26%
Total ECL Allowance	$ 9,704	$ 3,978
Total ECL Allowance, Percentage	0.94%	0.44%
Individual [Member] | Commerical Loans [Member] | B3 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 66,379	$ 85,851
Total Individual, Percentage	0.19%	0.26%
Total ECL Allowance	$ 4,198	$ 3,628
Total ECL Allowance, Percentage	0.40%	0.40%
Individual [Member] | Commerical Loans [Member] | B4 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 122,678	$ 133,701
Total Individual, Percentage	0.36%	0.41%
Total ECL Allowance	$ 24,022	$ 25,995
Total ECL Allowance, Percentage	2.32%	2.90%
Individual [Member] | Commerical Loans [Member] | C1 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 168,034	$ 158,437
Total Individual, Percentage	0.49%	0.48%
Total ECL Allowance	$ 50,566	$ 53,956
Total ECL Allowance, Percentage	4.88%	6.02%
Individual [Member] | Commerical Loans [Member] | C2 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 81,773	$ 75,830
Total Individual, Percentage	0.24%	0.23%
Total ECL Allowance	$ 27,947	$ 29,118
Total ECL Allowance, Percentage	2.70%	3.25%
Individual [Member] | Commerical Loans [Member] | C3 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 56,928	$ 48,601
Total Individual, Percentage	0.17%	0.15%
Total ECL Allowance	$ 15,689	$ 11,502
Total ECL Allowance, Percentage	1.51%	1.28%
Individual [Member] | Commerical Loans [Member] | C4 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 50,404	$ 41,372
Total Individual, Percentage	0.15%	0.13%
Total ECL Allowance	$ 21,181	$ 20,209
Total ECL Allowance, Percentage	2.04%	2.26%
Individual [Member] | Commerical Loans [Member] | C5 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 40,803	$ 44,904
Total Individual, Percentage	0.12%	0.14%
Total ECL Allowance	$ 20,664	$ 27,629
Total ECL Allowance, Percentage	1.99%	3.08%
Individual [Member] | Commerical Loans [Member] | C6 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 136,424	$ 53,647
Total Individual, Percentage	0.40%	0.16%
Total ECL Allowance	$ 107,549	$ 35,744
Total ECL Allowance, Percentage	10.37%	3.99%
Individual [Member] | Commerical Loans [Member] | Stage 1 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 9,764,799	$ 9,963,480
Total ECL Allowance	39,589	21,540
Individual [Member] | Commerical Loans [Member] | Stage 1 [Member] | A1 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	45,862	99,042
Total ECL Allowance	3	2
Individual [Member] | Commerical Loans [Member] | Stage 1 [Member] | A2 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	1,095,506	907,659
Total ECL Allowance	900	443
Individual [Member] | Commerical Loans [Member] | Stage 1 [Member] | A3 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	1,863,480	2,418,990
Total ECL Allowance	3,318	2,617
Individual [Member] | Commerical Loans [Member] | Stage 1 [Member] | A4 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	2,632,793	3,262,671
Total ECL Allowance	7,329	4,399
Individual [Member] | Commerical Loans [Member] | Stage 1 [Member] | A5 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	2,538,748	2,188,717
Total ECL Allowance	11,498	7,618
Individual [Member] | Commerical Loans [Member] | Stage 1 [Member] | A6 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	1,588,410	1,086,401
Total ECL Allowance	16,541	6,461
Individual [Member] | Commerical Loans [Member] | Stage 1 [Member] | B1 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual
Total ECL Allowance
Individual [Member] | Commerical Loans [Member] | Stage 1 [Member] | B2 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual
Total ECL Allowance
Individual [Member] | Commerical Loans [Member] | Stage 1 [Member] | B3 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual
Total ECL Allowance
Individual [Member] | Commerical Loans [Member] | Stage 1 [Member] | B4 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual
Total ECL Allowance
Individual [Member] | Commerical Loans [Member] | Stage 1 [Member] | C1 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual
Total ECL Allowance
Individual [Member] | Commerical Loans [Member] | Stage 1 [Member] | C2 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual
Total ECL Allowance
Individual [Member] | Commerical Loans [Member] | Stage 1 [Member] | C3 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual
Total ECL Allowance
Individual [Member] | Commerical Loans [Member] | Stage 1 [Member] | C4 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual
Total ECL Allowance
Individual [Member] | Commerical Loans [Member] | Stage 1 [Member] | C5 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual
Total ECL Allowance
Individual [Member] | Commerical Loans [Member] | Stage 1 [Member] | C6 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual
Total ECL Allowance
Individual [Member] | Commerical Loans [Member] | Stage 2 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	1,589,715	1,004,967
Total ECL Allowance	65,452	30,389
Individual [Member] | Commerical Loans [Member] | Stage 2 [Member] | A1 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual
Total ECL Allowance
Individual [Member] | Commerical Loans [Member] | Stage 2 [Member] | A2 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	3,265	37
Total ECL Allowance	54
Individual [Member] | Commerical Loans [Member] | Stage 2 [Member] | A3 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	19,658	61
Total ECL Allowance	339
Individual [Member] | Commerical Loans [Member] | Stage 2 [Member] | A4 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	42,529	7,184
Total ECL Allowance	606	22
Individual [Member] | Commerical Loans [Member] | Stage 2 [Member] | A5 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	164,341	22,163
Total ECL Allowance	4,618	515
Individual [Member] | Commerical Loans [Member] | Stage 2 [Member] | A6 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	289,460	47,157
Total ECL Allowance	14,010	1,410
Individual [Member] | Commerical Loans [Member] | Stage 2 [Member] | B1 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	715,348	603,201
Total ECL Allowance	25,679	12,641
Individual [Member] | Commerical Loans [Member] | Stage 2 [Member] | B2 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	161,239	82,781
Total ECL Allowance	9,566	3,773
Individual [Member] | Commerical Loans [Member] | Stage 2 [Member] | B3 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	65,684	85,034
Total ECL Allowance	3,764	3,367
Individual [Member] | Commerical Loans [Member] | Stage 2 [Member] | B4 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	73,248	83,039
Total ECL Allowance	3,008	4,085
Individual [Member] | Commerical Loans [Member] | Stage 2 [Member] | C1 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	29,863	45,433
Total ECL Allowance	2,201	3,516
Individual [Member] | Commerical Loans [Member] | Stage 2 [Member] | C2 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	12,282	8,865
Total ECL Allowance	926	614
Individual [Member] | Commerical Loans [Member] | Stage 2 [Member] | C3 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	1,550	15,762
Total ECL Allowance	86	221
Individual [Member] | Commerical Loans [Member] | Stage 2 [Member] | C4 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	2,227	2,405
Total ECL Allowance	143	170
Individual [Member] | Commerical Loans [Member] | Stage 2 [Member] | C5 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	3,981	847
Total ECL Allowance	267	43
Individual [Member] | Commerical Loans [Member] | Stage 2 [Member] | C6 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	5,040	998
Total ECL Allowance	185	12
Individual [Member] | Commerical Loans [Member] | Stage 3 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	530,066	401,007
Total ECL Allowance	261,505	196,166
Individual [Member] | Commerical Loans [Member] | Stage 3 [Member] | A1 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual
Total ECL Allowance
Individual [Member] | Commerical Loans [Member] | Stage 3 [Member] | A2 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual
Total ECL Allowance
Individual [Member] | Commerical Loans [Member] | Stage 3 [Member] | A3 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual
Total ECL Allowance
Individual [Member] | Commerical Loans [Member] | Stage 3 [Member] | A4 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual
Total ECL Allowance
Individual [Member] | Commerical Loans [Member] | Stage 3 [Member] | A5 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	232
Total ECL Allowance	78
Individual [Member] | Commerical Loans [Member] | Stage 3 [Member] | A6 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	53	487
Total ECL Allowance	53	208
Individual [Member] | Commerical Loans [Member] | Stage 3 [Member] | B1 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual
Total ECL Allowance
Individual [Member] | Commerical Loans [Member] | Stage 3 [Member] | B2 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	233	560
Total ECL Allowance	138	205
Individual [Member] | Commerical Loans [Member] | Stage 3 [Member] | B3 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	695	817
Total ECL Allowance	434	261
Individual [Member] | Commerical Loans [Member] | Stage 3 [Member] | B4 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	49,430	50,662
Total ECL Allowance	21,014	21,910
Individual [Member] | Commerical Loans [Member] | Stage 3 [Member] | C1 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	138,171	113,004
Total ECL Allowance	48,365	50,440
Individual [Member] | Commerical Loans [Member] | Stage 3 [Member] | C2 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	69,491	66,965
Total ECL Allowance	27,021	28,504
Individual [Member] | Commerical Loans [Member] | Stage 3 [Member] | C3 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	55,378	32,839
Total ECL Allowance	15,603	11,281
Individual [Member] | Commerical Loans [Member] | Stage 3 [Member] | C4 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	48,177	38,967
Total ECL Allowance	21,038	20,039
Individual [Member] | Commerical Loans [Member] | Stage 3 [Member] | C5 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	36,822	44,057
Total ECL Allowance	20,397	27,586
Individual [Member] | Commerical Loans [Member] | Stage 3 [Member] | C6 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	131,384	52,649
Total ECL Allowance	107,364	35,732
Collective [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 34,339,893	$ 32,671,515
Total Individual, Percentage	100.00%	100.00%
Total ECL Allowance	$ 1,036,793	$ 896,095
Total ECL Allowance, Percentage	100.00%	100.00%
Collective [Member] | Stage 1 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 30,216,324	$ 29,041,636
Total ECL Allowance	194,422	133,269
Collective [Member] | Stage 2 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	2,447,273	1,995,733
Total ECL Allowance	149,940	121,261
Collective [Member] | Stage 3 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	1,676,296	1,634,146
Total ECL Allowance	692,431	641,565
Collective [Member] | Commerical Loans [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 5,102,609	$ 4,492,871
Total Individual, Percentage	14.86%	13.75%
Total ECL Allowance	$ 278,526	$ 258,474
Total ECL Allowance, Percentage	26.86%	28.84%
Collective [Member] | Commerical Loans [Member] | Stage 1 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 4,493,999	$ 3,839,143
Total ECL Allowance	40,943	35,887
Collective [Member] | Commerical Loans [Member] | Stage 2 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	228,591	240,100
Total ECL Allowance	44,315	25,555
Collective [Member] | Commerical Loans [Member] | Stage 3 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	380,019	413,628
Total ECL Allowance	193,268	197,032
Collective [Member] | Mortgage [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 12,411,825	$ 11,262,995
Total Individual, Percentage	36.14%	34.47%
Total ECL Allowance	$ 112,522	$ 101,059
Total ECL Allowance, Percentage	10.85%	11.28%
Collective [Member] | Mortgage [Member] | Stage 1 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 11,518,363	$ 10,275,966
Total ECL Allowance	25,065	8,446
Collective [Member] | Mortgage [Member] | Stage 2 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	392,372	457,948
Total ECL Allowance	8,441	14,509
Collective [Member] | Mortgage [Member] | Stage 3 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	501,090	529,081
Total ECL Allowance	79,016	78,104
Collective [Member] | Consumer [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 4,940,879	$ 5,546,195
Total Individual, Percentage	14.39%	16.98%
Total ECL Allowance	$ 279,199	$ 288,467
Total ECL Allowance, Percentage	26.93%	32.19%
Collective [Member] | Consumer [Member] | Stage 1 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 4,439,163	$ 4,963,047
Total ECL Allowance	88,825	67,396
Collective [Member] | Consumer [Member] | Stage 2 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	236,595	292,718
Total ECL Allowance	31,732	50,808
Collective [Member] | Consumer [Member] | Stage 3 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	265,121	290,430
Total ECL Allowance	158,642	170,263
Collective [Member] | Subtotal [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 22,455,313	$ 21,302,061
Total Individual, Percentage	65.39%	65.20%
Total ECL Allowance	$ 670,247	$ 648,000
Total ECL Allowance, Percentage	64.65%	72.31%
Collective [Member] | Subtotal [Member] | Stage 1 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	$ 20,451,525	$ 19,078,156
Total ECL Allowance	154,833	111,729
Collective [Member] | Subtotal [Member] | Stage 2 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	857,558	990,766
Total ECL Allowance	84,488	90,872
Collective [Member] | Subtotal [Member] | Stage 3 [Member]
Risk Management (Details) - Schedule of quality assets and its related provision [Line Items]
Total Individual	1,146,230	1,233,139
Total ECL Allowance	$ 430,926	$ 445,399

Risk Management (Details) - S_5

Risk Management (Details) - Schedule of mortage and other loan - Stage 2 [Member]	12 Months Ended
	Dec. 31, 2020
Collective Marks [Member] | Mortgages [member]
Risk Management (Details) - Schedule of mortage and other loan [Line Items]
Percentage of quantitative criteria for significant increase in credit risk	39.57%
Collective Marks [Member] | Other Loans [Member]
Risk Management (Details) - Schedule of mortage and other loan [Line Items]
Percentage of quantitative criteria for significant increase in credit risk	39.11%
Description of quantitative criteria for significant increase in credit risk of portfolio I	Irregular portfolio > 30 days
Description of quantitative criteria for significant increase in credit risk of market	Irregular portfolio > 30 days
Description of quantitative criteria for significant increase in credit risk of market	Restructured marked for monitoring
Collective Marks [Member] | Revolving Credit Cards [Member]
Risk Management (Details) - Schedule of mortage and other loan [Line Items]
Percentage of quantitative criteria for significant increase in credit risk	15.73%
Description of quantitative criteria for significant increase in credit risk of portfolio I	Irregular portfolio > 30 days
Description of quantitative criteria for significant increase in credit risk of market	Irregular portfolio > 30 days
Description of quantitative criteria for significant increase in credit risk of market	Restructured marked for monitoring
Collective Marks [Member] | Collectively Assessed SME [Member]
Risk Management (Details) - Schedule of mortage and other loan [Line Items]
Percentage of quantitative criteria for significant increase in credit risk	39.11%
Description of quantitative criteria for significant increase in credit risk of portfolio I	Irregular portfolio > 30 days
Description of quantitative criteria for significant increase in credit risk of market	Irregular portfolio > 30 days
Description of quantitative criteria for significant increase in credit risk of market	Restructured marked for monitoring
Expected credit losses individually assessed [member] | Individually Assessed SME [Member]
Risk Management (Details) - Schedule of mortage and other loan [Line Items]
Percentage of quantitative criteria for significant increase in credit risk	22.69%
Description of quantitative criteria for significant increase in credit risk of portfolio I	Irregular portfolio > 30 days
Description of quantitative criteria for significant increase in credit risk of market	Irregular portfolio > 30 days
Description of quantitative criteria for significant increase in credit risk of market	Restructured marked for monitoring
Description of quantitative criteria for significant increase in credit risk of client	Clients considered to be substandard or in incompliance (pre-legal action)
Expected credit losses individually assessed [member] | Middle Market [Member]
Risk Management (Details) - Schedule of mortage and other loan [Line Items]
Percentage of quantitative criteria for significant increase in credit risk	4.50%
Description of quantitative criteria for significant increase in credit risk of portfolio I	Irregular portfolio > 30 days
Description of quantitative criteria for significant increase in credit risk of market	Irregular portfolio > 30 days
Description of quantitative criteria for significant increase in credit risk of market	Restructured marked for monitoring
Description of quantitative criteria for significant increase in credit risk of client	Clients considered to be substandard or in incompliance (pre-legal action)
Expected credit losses individually assessed [member] | Corporate And Investment Banking [Member]
Risk Management (Details) - Schedule of mortage and other loan [Line Items]
Description of quantitative criteria for significant increase in credit risk	Santander Group criteria
Description of quantitative criteria for significant increase in credit risk of portfolio I	Irregular portfolio > 30 days
Description of quantitative criteria for significant increase in credit risk of market	Irregular portfolio > 30 days
Description of quantitative criteria for significant increase in credit risk of market	Restructured marked for monitoring
Description of quantitative criteria for significant increase in credit risk of client	Clients considered to be substandard or in incompliance (pre-legal action)

Risk Management (Details) - S_6

Risk Management (Details) - Schedule of allowance and exposure at default (EAD) of the loans - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Schedule of allowance and exposure at default (EAD) of the loans [Abstract]
Loans and account receivable	$ 224,087	$ 128,161
Allowance for ECL	$ 119,537	$ 53,741

Risk Management (Details) - S_7

Risk Management (Details) - Schedule of modified loans - Collective [Member] - Credit Risk [Member] - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Risk Management (Details) - Schedule of modified loans [Line Items]
Financial assets	$ 34,339,893	$ 32,671,515
Modified loans	$ 1,685,593	$ 1,123,845
Percentage	491.00%	3.44%
Total ECL Allowance	$ 1,036,793	$ 896,095
Modified loans	$ 442,603	$ 278,978
Percentage	42.69%	31.13%
Stage 1 [Member]
Risk Management (Details) - Schedule of modified loans [Line Items]
Financial assets	$ 30,216,324	$ 29,041,636
Modified loans
Percentage
Total ECL Allowance	$ 194,422	$ 133,269
Modified loans
Percentage
Stage 2 [Member]
Risk Management (Details) - Schedule of modified loans [Line Items]
Financial assets	2,447,273	$ 1,995,733
Modified loans	$ 799,572	$ 512,529
Percentage	36.67%	25.68%
Total ECL Allowance	$ 149,940	$ 121,261
Modified loans	$ 33,118	$ 36,329
Percentage	22.09%	29.96%
Stage 3 [Member]
Risk Management (Details) - Schedule of modified loans [Line Items]
Financial assets	$ 1,676,296	$ 1,634,146
Modified loans	$ 886,021	$ 611,316
Percentage	52.86%	37.41%
Total ECL Allowance	$ 692,431	$ 641,565
Modified loans	$ 409,485	$ 242,649
Percentage	59.14%	37.82%

Risk Management (Details) - S_8

Risk Management (Details) - Schedule of classification of relief measures $ in Millions	12 Months Ended
	Dec. 31, 2020CLP ($)
Schedule of classification of relief measures [Abstract]
New loans subject to government guarantee	$ 2,076,119
Payment holiday	9,098,028
Payment holiday – current	734,986
Payment holiday - expired	$ 8,363,042

Risk Management (Details) - S_9

Risk Management (Details) - Schedule of residual maturity over measured that have not expired $ in Millions	Dec. 31, 2020CLP ($)
Risk Management (Details) - Schedule of residual maturity over measured that have not expired [Line Items]
New loans subject to government guarantee	$ 2,076,119
Payment holiday – current	734,986
Risk Management (Details) - Schedule of residual maturity over measured that have not expired [Line Items]
New loans subject to government guarantee
Payment holiday – current	722,746
Risk Management (Details) - Schedule of residual maturity over measured that have not expired [Line Items]
New loans subject to government guarantee
Payment holiday – current	7,861
Risk Management (Details) - Schedule of residual maturity over measured that have not expired [Line Items]
New loans subject to government guarantee	214,400
Payment holiday – current	4,379
> 2 year = 5 year [Member]
Risk Management (Details) - Schedule of residual maturity over measured that have not expired [Line Items]
New loans subject to government guarantee	1,861,719
Payment holiday – current

Risk Management (Details) - _10

Risk Management (Details) - Schedule of macro economical forward - Macro Economic [Member] - Average estimates 2020 - 2021 [Member]	Dec. 31, 2020
Unfavorable Scenario 2 [Member] | Official Interest Rate [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	0.25%
Unfavorable Scenario 2 [Member] | Unemployment Rate [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	7.31%
Unfavorable Scenario 2 [Member] | Housing Price Growth [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	(1.70%)
Unfavorable Scenario 2 [Member] | GDP Growth [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	(1.16%)
Unfavorable Scenario 2 [Member] | Consumer Price Index [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	(0.26%)
Unfavorable Scenario 1 [Member] | Official Interest Rate [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	0.50%
Unfavorable Scenario 1 [Member] | Unemployment Rate [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	6.96%
Unfavorable Scenario 1 [Member] | Housing Price Growth [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	1.04%
Unfavorable Scenario 1 [Member] | GDP Growth [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	0.67%
Unfavorable Scenario 1 [Member] | Consumer Price Index [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	1.07%
Base Scenario [Member] | Official Interest Rate [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	1.59%
Base Scenario [Member] | Unemployment Rate [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	6.50%
Base Scenario [Member] | Housing Price Growth [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	4.67%
Base Scenario [Member] | GDP Growth [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	3.12%
Base Scenario [Member] | Consumer Price Index [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	2.82%
Favorable Scenario 1 [Member] | Official Interest Rate [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	3.20%
Favorable Scenario 1 [Member] | Unemployment Rate [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	6.04%
Favorable Scenario 1 [Member] | Housing Price Growth [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	8.30%
Favorable Scenario 1 [Member] | GDP Growth [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	5.56%
Favorable Scenario 1 [Member] | Consumer Price Index [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	4.57%
Favorable Scenario 2 [Member] | Official Interest Rate [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	4.42%
Favorable Scenario 2 [Member] | Unemployment Rate [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	5.70%
Favorable Scenario 2 [Member] | Housing Price Growth [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	11.04%
Favorable Scenario 2 [Member] | GDP Growth [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	7.40%
Favorable Scenario 2 [Member] | Consumer Price Index [Member]
Risk Management (Details) - Schedule of macro economical forward [Line Items]
Percentage of macroeconomic annual growth forecasts	5.90%

Risk Management (Details) - _11

Risk Management (Details) - Schedule of probabilities - Probability Weighting [Member]	12 Months Ended
	Dec. 31, 2020
Local Scenario [Member]
Risk Management (Details) - Schedule of probabilities [Line Items]
Favorable scenario 2	10.00%
Favorable scenario 1	15.00%
Base scenario	50.00%
Unfavorable scenario 1	15.00%
Unfavorable scenario 2	10.00%
Global Scenario [Member]
Risk Management (Details) - Schedule of probabilities [Line Items]
Favorable scenario 1	30.00%
Base scenario	40.00%
Unfavorable scenario 1	30.00%

Risk Management (Details) - _12

Risk Management (Details) - Schedule of allowance sensibility - Macro Economic [Member] - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Risk Management (Details) - Schedule of allowance sensibility [Line Items]
Reported ECL allowance	$ 1,036,793	$ 896,095
Gross carrying amount	$ 34,339,893	$ 32,671,515
Reported ECL Coverage	3.02%	2.74%
Favorable Scenario 2 [Member]
Risk Management (Details) - Schedule of allowance sensibility [Line Items]
Reported ECL allowance	$ 876,654	$ 797,501
Reported ECL Coverage	2.55%	2.44%
Favorable Scenario 1 [Member]
Risk Management (Details) - Schedule of allowance sensibility [Line Items]
Reported ECL allowance	$ 930,044	$ 835,956
Reported ECL Coverage	2.71%	2.56%
Base Scenario [Member]
Risk Management (Details) - Schedule of allowance sensibility [Line Items]
Reported ECL allowance	$ 981,671	$ 884,480
Reported ECL Coverage	2.86%	2.71%
Unfavorable Scenario 2 [Member]
Risk Management (Details) - Schedule of allowance sensibility [Line Items]
Reported ECL allowance	$ 1,047,127	$ 929,802
Reported ECL Coverage	3.05%	2.85%
Unfavorable scenarios 2 [Member]
Risk Management (Details) - Schedule of allowance sensibility [Line Items]
Reported ECL allowance	$ 1,083,371	$ 962,437
Reported ECL Coverage	3.15%	2.95%

Risk Management (Details) - _13

Risk Management (Details) - Schedule of risk concentration - CLP ($) $ in Thousands		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	[1]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		$ 34,339,893,000	$ 32,671,515,000
Stage 1 [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		30,216,324,000	29,041,636,000
Stage 2 [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		2,447,273,000	1,995,733,000
Stage 3 [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		1,676,296,000	1,634,146,000
Commercial Loans [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		16,987,189,000	15,862,325,000	$ 15,217,460,000
Commercial Loans [Member] | Subtotal [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		16,987,189,000	15,862,325,000
Commercial Loans [Member] | Stage 1 [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances			13,802,623,000
Commercial Loans [Member] | Stage 1 [Member] | Subtotal [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		14,258,798,000	13,802,623,000
Commercial Loans [Member] | Stage 2 [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances			1,245,067,000
Commercial Loans [Member] | Stage 2 [Member] | Subtotal [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		1,818,306,000	1,245,067,000
Commercial Loans [Member] | Stage 3 [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		910,085	814,635,000
Commercial Loans [Member] | Stage 3 [Member] | Subtotal [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		910,085,000	814,635,000
Commercial Loans [Member] | Manufacturing [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		1,378,221,000	1,285,814,000
Commercial Loans [Member] | Manufacturing [Member] | Stage 1 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		1,180,220,000	1,110,484,000
Commercial Loans [Member] | Manufacturing [Member] | Stage 2 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		130,361,000	107,356,000
Commercial Loans [Member] | Manufacturing [Member] | Stage 3 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		67,640,000	67,974,000
Commercial Loans [Member] | Mining [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		433,615,000	407,041,000
Commercial Loans [Member] | Mining [Member] | Stage 1 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		265,195,000	280,297,000
Commercial Loans [Member] | Mining [Member] | Stage 2 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		161,631,000	123,005,000
Commercial Loans [Member] | Mining [Member] | Stage 3 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		6,789,000	3,739,000
Commercial Loans [Member] | Electricity, Gas and Water [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		384,274,000	341,044,000
Commercial Loans [Member] | Electricity, Gas and Water [Member] | Stage 1 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		349,849,000	309,941,000
Commercial Loans [Member] | Electricity, Gas and Water [Member] | Stage 2 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		27,848,000	22,907,000
Commercial Loans [Member] | Electricity, Gas and Water [Member] | Stage 3 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		6,577,000	8,196,000
Commercial Loans [Member] | Agriculture and Livestock [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		1,345,864,000	1,287,281,000
Commercial Loans [Member] | Agriculture and Livestock [Member] | Stage 1 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		1,024,795,000	1,020,857,000
Commercial Loans [Member] | Agriculture and Livestock [Member] | Stage 2 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		233,552,000	172,984,000
Commercial Loans [Member] | Agriculture and Livestock [Member] | Stage 3 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		87,517,000	93,440,000
Commercial Loans [Member] | Forest [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		179,175,000	165,207,000
Commercial Loans [Member] | Forest [Member] | Stage 1 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		141,892,000	132,483,000
Commercial Loans [Member] | Forest [Member] | Stage 2 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		23,463,000	17,035,000
Commercial Loans [Member] | Forest [Member] | Stage 3 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		13,820,000	15,689,000
Commercial Loans [Member] | Fishing [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		234,152,000	256,554,000
Commercial Loans [Member] | Fishing [Member] | Stage 1 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		209,182,000	223,980,000
Commercial Loans [Member] | Fishing [Member] | Stage 2 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		20,128,000	24,879,000
Commercial Loans [Member] | Fishing [Member] | Stage 3 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		4,842,000	7,695,000
Commercial Loans [Member] | Transportation [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		777,861,000	763,877,000
Commercial Loans [Member] | Transportation [Member] | Stage 1 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		622,161,000	665,570,000
Commercial Loans [Member] | Transportation [Member] | Stage 2 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		97,624,000	64,115,000
Commercial Loans [Member] | Transportation [Member] | Stage 3 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		58,076,000	34,192,000
Commercial Loans [Member] | Communications [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		331,115,000	240,950,000
Commercial Loans [Member] | Communications [Member] | Stage 1 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		294,957,000	206,660,000
Commercial Loans [Member] | Communications [Member] | Stage 2 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		28,433,000	28,122,000
Commercial Loans [Member] | Communications [Member] | Stage 3 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		7,725,000	6,168,000
Commercial Loans [Member] | Construction [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances	[2]	959,369,000	974,268,000
Commercial Loans [Member] | Construction [Member] | Stage 1 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances	[2]	811,807,000	782,265,000
Commercial Loans [Member] | Construction [Member] | Stage 2 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances	[2]	61,828,000	85,435,000
Commercial Loans [Member] | Construction [Member] | Stage 3 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances	[2]	85,734,000	106,568,000
Commercial Loans [Member] | Commerce Industry [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		2,863,338,000	2,796,415,000
Commercial Loans [Member] | Commerce Industry [Member] | Stage 1 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		2,549,770,000	2,655,982,000
Commercial Loans [Member] | Commerce Industry [Member] | Stage 2 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		223,884,000	110,326,000
Commercial Loans [Member] | Commerce Industry [Member] | Stage 3 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		89,684,000	30,107,000
Commercial Loans [Member] | Services [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		4,139,297,000	3,366,132,000
Commercial Loans [Member] | Services [Member] | Stage 1 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		3,506,443,000	2,971,563,000
Commercial Loans [Member] | Services [Member] | Stage 2 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		393,319,000	190,097,000
Commercial Loans [Member] | Services [Member] | Stage 3 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		239,535,000	204,472,000
Commercial Loans [Member] | Other [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		3,960,908,000	3,977,742,000
Commercial Loans [Member] | Other [Member] | Stage 1 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		3,302,527,000	3,442,541,000
Commercial Loans [Member] | Other [Member] | Stage 2 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		416,235,000	298,806,000
Commercial Loans [Member] | Other [Member] | Stage 3 [Member] | Market Risk [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		242,146,000	236,395,000
Mortgages [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		12,411,825,000	11,262,995,000
Mortgages [Member] | Stage 1 [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		11,518,363,000	10,275,966,000
Mortgages [Member] | Stage 2 [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		392,372,000	457,948,000
Mortgages [Member] | Stage 3 [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		501,090,000	529,081,000
Commercials Loan [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		4,940,879,000	5,546,195,000
Commercials Loan [Member] | Stage 1 [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		4,439,163,000	4,963,047,000
Commercials Loan [Member] | Stage 2 [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		236,595,000	292,718,000
Commercials Loan [Member] | Stage 3 [Member]
Risk Management (Details) - Schedule of risk concentration [Line Items]
Assets before allowances		$ 265,121,000	$ 290,430,000
[1]	Include loans and ECL balances of the acquired Santander Consumer Chile S.A.
[2]	In 2019 we improved the classification of our construction loans, reassigning loans for real state rental investment companies to services.

Risk Management (Details) - _14

Risk Management (Details) - Schedule of financial assets and associated collateral - Credit Risk [Member] - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Risk Management (Details) - Schedule of financial assets and associated collateral [Line Items]
Maximum exposure to credit risk	$ 34,410,578	$ 32,737,681
Collateral	22,471,455	19,654,196
Net exposure	11,939,123	13,083,485
Associated ECL	1,038,147	896,196
Commercial Loans [Member]
Risk Management (Details) - Schedule of financial assets and associated collateral [Line Items]
Maximum exposure to credit risk	17,057,874	15,928,491
Collateral	9,887,154	8,180,015
Net exposure	7,170,720	7,748,476
Associated ECL	646,426	506,670
Mortage loans [Member]
Risk Management (Details) - Schedule of financial assets and associated collateral [Line Items]
Maximum exposure to credit risk	12,411,825	11,262,995
Collateral	11,931,235	10,725,604
Net exposure	480,590	537,391
Associated ECL	112,522	101,059
Consumer Loans [Member]
Risk Management (Details) - Schedule of financial assets and associated collateral [Line Items]
Maximum exposure to credit risk	4,940,879	5,546,195
Collateral	653,066	748,577
Net exposure	4,287,813	4,797,618
Associated ECL	$ 279,199	$ 288,467

Risk Management (Details) - _15

Risk Management (Details) - Schedule of financial assets and off-balance sheet commitments - Credit Risk [Member] - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Risk Management (Details) - Schedule of financial assets and off-balance sheet commitments [Line Items]
Total	$ 62,869,327	$ 59,129,994
Deposits In Banks [Member]
Risk Management (Details) - Schedule of financial assets and off-balance sheet commitments [Line Items]
Total	2,137,891	2,693,342
Cash Items In Process Of Collection [Member]
Risk Management (Details) - Schedule of financial assets and off-balance sheet commitments [Line Items]
Total	452,963	355,062
Financial derivative contracts [Member]
Risk Management (Details) - Schedule of financial assets and off-balance sheet commitments [Line Items]
Total	9,032,085	8,148,608
Financial Assets Held For Trading [Member]
Risk Management (Details) - Schedule of financial assets and off-balance sheet commitments [Line Items]
Total	133,718	270,204
Loans And Account Receivable At Amortised Cost / Loans And Account Receivable At FVOCI [Member]
Risk Management (Details) - Schedule of financial assets and off-balance sheet commitments [Line Items]
Total	33,372,431	31,841,485
Debt Instrument At Fair Value Through Other Comprehensive Income [Member]
Risk Management (Details) - Schedule of financial assets and off-balance sheet commitments [Line Items]
Total	7,162,542	4,010,272
Letters Of Credit Issued [Member]
Risk Management (Details) - Schedule of financial assets and off-balance sheet commitments [Line Items]
Total	165,119	140,572
Foreign Letters Of Credit Confirmed [Member]
Risk Management (Details) - Schedule of financial assets and off-balance sheet commitments [Line Items]
Total	82,779	70,192
Performance guarantees [Member]
Risk Management (Details) - Schedule of financial assets and off-balance sheet commitments [Line Items]
Total	1,090,643	1,929,894
Available Credit Lines [Member]
Risk Management (Details) - Schedule of financial assets and off-balance sheet commitments [Line Items]
Total	8,391,414	8,732,422
Personal guarantees [Member]
Risk Management (Details) - Schedule of financial assets and off-balance sheet commitments [Line Items]
Total	441,508	451,950
Other Irrevocable Credit Commitments [Member]
Risk Management (Details) - Schedule of financial assets and off-balance sheet commitments [Line Items]
Total	$ 406,234	$ 485,991

Risk Management (Details) - _16

Risk Management (Details) - Schedule of fair value of derivative instruments - Financial Derivatives Contracts [Member] - Credit Risk [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)
Risk Management (Details) - Schedule of fair value of derivative instruments [Line Items]
Derivative Instruments (adjusted to market)	$ 18,050
Deposits	3,390
Loans	130
Financial investments
Total Exposure	$ 21,570
COLOMBIA
Risk Management (Details) - Schedule of fair value of derivative instruments [Line Items]
Classification	2
Derivative Instruments (adjusted to market)	$ 810
Deposits
Loans
Financial investments
Total Exposure	$ 810
Italia
Risk Management (Details) - Schedule of fair value of derivative instruments [Line Items]
Classification	2
Derivative Instruments (adjusted to market)
Deposits	3,360
Loans	130
Financial investments
Total Exposure	$ 3,490
Mexico
Risk Management (Details) - Schedule of fair value of derivative instruments [Line Items]
Classification	2
Derivative Instruments (adjusted to market)	$ 9,860
Deposits	30
Loans
Financial investments
Total Exposure	$ 9,890
Panama
Risk Management (Details) - Schedule of fair value of derivative instruments [Line Items]
Classification	2
Derivative Instruments (adjusted to market)	$ 5,770
Deposits
Loans
Financial investments
Total Exposure	$ 5,770
Peru
Risk Management (Details) - Schedule of fair value of derivative instruments [Line Items]
Classification	2
Derivative Instruments (adjusted to market)	$ 1,610
Deposits
Loans
Financial investments
Total Exposure	$ 1,610
Spain
Risk Management (Details) - Schedule of fair value of derivative instruments [Line Items]
Classification	1	[1]
Derivative Instruments (adjusted to market)	$ 176,340	[1]
Deposits	139,900	[1]
Loans		[1]
Financial investments		[1]
Total Exposure	$ 316,240	[1]
UK [Member]
Risk Management (Details) - Schedule of fair value of derivative instruments [Line Items]
Classification	1
Derivative Instruments (adjusted to market)	$ 20,950
Deposits	50
Total Exposure	$ 21,000
Banco Santander Mexico [Member]
Risk Management (Details) - Schedule of fair value of derivative instruments [Line Items]
Classification	2
Derivative Instruments (adjusted to market)	$ 9,880
Deposits	30
Total Exposure	9,910
Santander Group [Member]
Risk Management (Details) - Schedule of fair value of derivative instruments [Line Items]
Derivative Instruments (adjusted to market)	207,170
Deposits	139,980
Total Exposure	$ 347,150
[1]	We have included our exposure to Santander branches in New York and Hong Kong as exposure to Spain.

Risk Management (Details) - _17

Risk Management (Details) - Schedule of security interests, collateral, or credit improvements - Credit risk [member] - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Risk Management (Details) - Schedule of security interests, collateral, or credit improvements [Line Items]
Total	$ 29,344,459	$ 27,968,651
Properties/Mortgages [Member] | Non-impaired financial assets [Member]
Risk Management (Details) - Schedule of security interests, collateral, or credit improvements [Line Items]
Total	25,424,161	23,371,510
Properties/Mortgages [Member] | Impaired financial assets [Member]
Risk Management (Details) - Schedule of security interests, collateral, or credit improvements [Line Items]
Total	1,548,568	1,245,971
Investments & Others [Member] | Non-impaired financial assets [Member]
Risk Management (Details) - Schedule of security interests, collateral, or credit improvements [Line Items]
Total	2,306,062	2,785,219
Investments & Others [Member] | Impaired financial assets [Member]
Risk Management (Details) - Schedule of security interests, collateral, or credit improvements [Line Items]
Total	$ 65,668	$ 565,951

Risk Management (Details) - _18

Risk Management (Details) - Schedule of breakdown of bank's liquid assets by levels - CLP ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Balance as of:
Cash and cash equivalent		$ 988,320	$ 1,305,534
Level 1 liquid assets	[1]	2,490,810	2,452,599
Level 2 liquid assets	[2]	12,681	15,105
Total liquid assets		$ 3,491,811	$ 3,773,238
[1]	Includes instruments issued by the Central Bank of Chile or other central banks with a AAA rating, instruments issued by the Chilean government or other sovereign with a AAA rating and instruments issued by development banks with a AAA rating. Assets encumbered through repurchase agreements are deducted from the liquidity portfolio including those left as collateral under the FCIC funding program with the Central Bank of Chile.
[2]	Includes instruments issued by governments, central banks and development banks of foreign countries with a risk rating of A- to AA+ and mortgage bonds issued by Chilean banks that are acceptable at the Chilean Central Bank’s repo window.

Risk Management (Details) - _19

Risk Management (Details) - Schedule of exposure to liquidity risk	Dec. 31, 2020	Dec. 31, 2019
30 Days [Member]
Risk Management (Details) - Schedule of exposure to liquidity risk [Line Items]
Percentages of exposure to liquidity risk	30.00%	63.00%
30 Days Foreign Currency [Member]
Risk Management (Details) - Schedule of exposure to liquidity risk [Line Items]
Percentages of exposure to liquidity risk	15.00%
90 Days [Member]
Risk Management (Details) - Schedule of exposure to liquidity risk [Line Items]
Percentages of exposure to liquidity risk	32.00%	79.00%

Risk Management (Details) - _20

Risk Management (Details) - Schedule of breakdown by maturity - Liquidity Risk [Member] - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	$ 1,780,050
Up to 1 month [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	208,577
Between 1 and 3 months [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	343,177
Between 3 and 12 months [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	857,363
More than 5 years [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	6,620
Between 1 and 5 years [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	364,312
Obligations under repurchase agreements [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	969,808	$ 380,055
Obligations under repurchase agreements [Member] | Demand [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities
Obligations under repurchase agreements [Member] | Up to 1 month [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	969,808	380,055
Obligations under repurchase agreements [Member] | Between 1 and 3 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities
Obligations under repurchase agreements [Member] | Between 3 and 12 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities
Obligations under repurchase agreements [Member] | Subtotal up to 1 year [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	969,808	380,055
Obligations under repurchase agreements [Member] | Between 1 and 3 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities
Obligations under repurchase agreements [Member] | Between 3 and 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities
Obligations under repurchase agreements [Member] | More than 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities
Obligations under repurchase agreements [Member] | Due Within 1 Year [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities
Checking accounts, time deposits and other time liabilities [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	25,504,315	23,490,249
Checking accounts, time deposits and other time liabilities [Member] | Demand [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	15,082,442	10,439,705
Checking accounts, time deposits and other time liabilities [Member] | Up to 1 month [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	5,843,682	5,184,567
Checking accounts, time deposits and other time liabilities [Member] | Between 1 and 3 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	2,912,985	4,905,414
Checking accounts, time deposits and other time liabilities [Member] | Between 3 and 12 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	1,434,246	2,417,703
Checking accounts, time deposits and other time liabilities [Member] | Subtotal up to 1 year [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	25,273,355	22,947,389
Checking accounts, time deposits and other time liabilities [Member] | Between 1 and 3 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	163,053	357,856
Checking accounts, time deposits and other time liabilities [Member] | Between 3 and 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	44,384	163,121
Checking accounts, time deposits and other time liabilities [Member] | More than 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	23,523	21,883
Checking accounts, time deposits and other time liabilities [Member] | Due Within 1 Year [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	230,960	542,860
Financial Derivatives Contracts [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	9,018,660	7,390,654
Financial Derivatives Contracts [Member] | Demand [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities
Financial Derivatives Contracts [Member] | Up to 1 month [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	386,690	422,749
Financial Derivatives Contracts [Member] | Between 1 and 3 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	445,376	427,825
Financial Derivatives Contracts [Member] | Between 3 and 12 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	931,358	951,684
Financial Derivatives Contracts [Member] | Subtotal up to 1 year [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	1,763,424	1,802,258
Financial Derivatives Contracts [Member] | Between 1 and 3 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	1,552,482	1,253,280
Financial Derivatives Contracts [Member] | Between 3 and 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	1,708,509	1,180,948
Financial Derivatives Contracts [Member] | More than 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	3,994,245	3,154,168
Financial Derivatives Contracts [Member] | Due Within 1 Year [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	7,255,236	5,588,396
Interbank Borrowings [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	6,328,599	2,519,818
Interbank Borrowings [Member] | Demand [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	16,832	94
Interbank Borrowings [Member] | Up to 1 month [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	238,414	363,560
Interbank Borrowings [Member] | Between 1 and 3 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	222,992	624,167
Interbank Borrowings [Member] | Between 3 and 12 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	855,434	1,141,824
Interbank Borrowings [Member] | Subtotal up to 1 year [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	1,333,672	2,129,645
Interbank Borrowings [Member] | Between 1 and 3 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	1,140,426	387,936
Interbank Borrowings [Member] | Between 3 and 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	3,854,501	2,237
Interbank Borrowings [Member] | More than 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities
Interbank Borrowings [Member] | Due Within 1 Year [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	4,994,927	390,173
Issue debt instruments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	8,204,177	9,500,723
Issue debt instruments [Member] | Demand [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities
Issue debt instruments [Member] | Up to 1 month [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	344,732	285,159
Issue debt instruments [Member] | Between 1 and 3 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	447,117	759,519
Issue debt instruments [Member] | Between 3 and 12 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	343,156	1,044,674
Issue debt instruments [Member] | Subtotal up to 1 year [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	1,135,005	2,089,352
Issue debt instruments [Member] | Between 1 and 3 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	1,813,341	2,394,850
Issue debt instruments [Member] | Between 3 and 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	2,499,560	2,042,292
Issue debt instruments [Member] | More than 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	2,756,271	2,974,229
Issue debt instruments [Member] | Due Within 1 Year [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	7,069,172	7,411,371
Lease liabilities [member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	184,318	158,494
Lease liabilities [member] | Demand [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	144,478
Lease liabilities [member] | Up to 1 month [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	38,148
Lease liabilities [member] | Between 1 and 3 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	1,375
Lease liabilities [member] | Between 3 and 12 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	27	26,061
Lease liabilities [member] | Subtotal up to 1 year [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	184,028	26,061
Lease liabilities [member] | Between 1 and 3 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	89	45,978
Lease liabilities [member] | Between 3 and 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	105	36,393
Lease liabilities [member] | More than 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	96	50,062
Lease liabilities [member] | Due Within 1 Year [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	290	132,433
Other financial liabilities [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	149,585	226,358
Other financial liabilities [Member] | Demand [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities		161,021
Other financial liabilities [Member] | Up to 1 month [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities		5,155
Other financial liabilities [Member] | Between 1 and 3 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities		30,969
Other financial liabilities [Member] | Between 3 and 12 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	25,526	28,888
Other financial liabilities [Member] | Subtotal up to 1 year [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	25,526	226,033
Other financial liabilities [Member] | Between 1 and 3 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	44,933	83
Other financial liabilities [Member] | Between 3 and 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	35,679	99
Other financial liabilities [Member] | More than 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	43,447	143
Other financial liabilities [Member] | Due Within 1 Year [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	124,059	325
Total Financial Liabilities Before Interest Payment [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	50,359,462	43,666,351
Total Financial Liabilities Before Interest Payment [Member] | Demand [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	15,243,752	10,600,820
Total Financial Liabilities Before Interest Payment [Member] | Up to 1 month [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	7,821,474	6,641,245
Total Financial Liabilities Before Interest Payment [Member] | Between 1 and 3 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	4,029,845	6,747,894
Total Financial Liabilities Before Interest Payment [Member] | Between 3 and 12 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	3,589,746	5,610,834
Total Financial Liabilities Before Interest Payment [Member] | Subtotal up to 1 year [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	30,684,818	29,600,793
Total Financial Liabilities Before Interest Payment [Member] | Between 1 and 3 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	4,714,324	4,439,983
Total Financial Liabilities Before Interest Payment [Member] | Between 3 and 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	8,142,738	3,425,090
Total Financial Liabilities Before Interest Payment [Member] | More than 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	6,817,583	6,200,485
Total Financial Liabilities Before Interest Payment [Member] | Due Within 1 Year [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	19,674,644	14,065,558
Contractual Interest Payments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	727,413	8,630,173
Contractual Interest Payments [Member] | Demand [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	86,195	10,473
Contractual Interest Payments [Member] | Up to 1 month [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	18,938	148,731
Contractual Interest Payments [Member] | Between 1 and 3 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	72,710	267,994
Contractual Interest Payments [Member] | Between 3 and 12 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	242,462	1,727,401
Contractual Interest Payments [Member] | Subtotal up to 1 year [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	420,305	2,154,599
Contractual Interest Payments [Member] | Between 1 and 3 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	143,531	1,720,990
Contractual Interest Payments [Member] | Between 3 and 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	137,902	1,653,500
Contractual Interest Payments [Member] | More than 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	25,676	3,101,084
Contractual Interest Payments [Member] | Due Within 1 Year [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	307,109	6,475,574
Total Financial Liabilities After Interest Payment [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	51,086,875	52,296,524
Total Financial Liabilities After Interest Payment [Member] | Demand [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	15,329,947	10,611,293
Total Financial Liabilities After Interest Payment [Member] | Up to 1 month [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	7,840,412	6,789,976
Total Financial Liabilities After Interest Payment [Member] | Between 1 and 3 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	4,102,555	7,015,888
Total Financial Liabilities After Interest Payment [Member] | Between 3 and 12 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	3,832,208	7,338,235
Total Financial Liabilities After Interest Payment [Member] | Subtotal up to 1 year [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	31,105,122	31,755,392
Total Financial Liabilities After Interest Payment [Member] | Between 1 and 3 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	4,857,855	6,160,973
Total Financial Liabilities After Interest Payment [Member] | Between 3 and 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	8,280,640	5,078,590
Total Financial Liabilities After Interest Payment [Member] | More than 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	6,843,258	9,301,569
Total Financial Liabilities After Interest Payment [Member] | Due Within 1 Year [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	19,981,753	20,541,132
Performance guarantee [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	1,090,643	1,923,022
Performance guarantee [Member] | Up to 1 month [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	114,653	144,364
Performance guarantee [Member] | Between 1 and 3 months [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	181,399	544,370
Performance guarantee [Member] | Between 3 and 12 months [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	437,835	899,437
Performance guarantee [Member] | More than 5 years [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	6,620	22,292
Performance guarantee [Member] | Between 1 and 5 years [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	350,136	312,559
Confirmed foreign letters of credit [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	82,779	70,192
Confirmed foreign letters of credit [Member] | Up to 1 month [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	18,247	25,491
Confirmed foreign letters of credit [Member] | Between 1 and 3 months [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	48,056	1,808
Confirmed foreign letters of credit [Member] | Between 3 and 12 months [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	16,163	11,306
Confirmed foreign letters of credit [Member] | More than 5 years [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities
Confirmed foreign letters of credit [Member] | Between 1 and 5 years [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	313	31,587
Letters of credit issued [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	165,119	135,266
Letters of credit issued [Member] | Up to 1 month [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	42,089	30,555
Letters of credit issued [Member] | Between 1 and 3 months [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	83,764	348
Letters of credit issued [Member] | Between 3 and 12 months [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	36,201	33,439
Letters of credit issued [Member] | More than 5 years [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities
Letters of credit issued [Member] | Between 1 and 5 years [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	3,065	70,924
Pledges and other commercial commitments [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	441,508	451,751
Pledges and other commercial commitments [Member] | Up to 1 month [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	33,588	30,357
Pledges and other commercial commitments [Member] | Between 1 and 3 months [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	29,958	9,009
Pledges and other commercial commitments [Member] | Between 3 and 12 months [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	367,164	317,824
Pledges and other commercial commitments [Member] | More than 5 years [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities
Pledges and other commercial commitments [Member] | Between 1 and 5 years [Member] | Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities	$ 10,798	94,561
Other Commercial Commitments [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities		2,580,231
Other Commercial Commitments [Member] | Up to 1 month [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities		230,767
Other Commercial Commitments [Member] | Between 1 and 3 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities		555,535
Other Commercial Commitments [Member] | Between 3 and 12 months [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities		1,262,006
Other Commercial Commitments [Member] | More than 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities		22,292
Other Commercial Commitments [Member] | Between 1 and 5 years [Member]
Risk Management (Details) - Schedule of breakdown by maturity [Line Items]
Financial liabilities		$ 509,631

Risk Management (Details) - _21

Risk Management (Details) - Schedule of net losses from operational risks - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Risk Management (Details) - Schedule of net losses from operational risks [Line Items]
Total	$ 8,366	$ 10,983
Fraud [Member]
Risk Management (Details) - Schedule of net losses from operational risks [Line Items]
Total	4,703	3,941
Labor related [Member]
Risk Management (Details) - Schedule of net losses from operational risks [Line Items]
Total	443	461
Client / product related [Member]
Risk Management (Details) - Schedule of net losses from operational risks [Line Items]
Total	250	653
Damage to fixed assets [Member]
Risk Management (Details) - Schedule of net losses from operational risks [Line Items]
Total	(2,592)	3,588
Business continuity / Systems [Member]
Risk Management (Details) - Schedule of net losses from operational risks [Line Items]
Total	1,570	234
Processing [Member]
Risk Management (Details) - Schedule of net losses from operational risks [Line Items]
Total	$ 3,992	$ 2,106

Risk Management (Details) - _22

Risk Management (Details) - Schedule of levels of basic capital and effective net equity - CLP ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Schedule of levels of basic capital and effective net equity [Abstract]
Basic capital	$ 3,567,916	$ 3,390,823
Basic capital	6.69%	6.96%
Regulatory capital	$ 5,143,843	$ 4,304,401
Regulatory capital	15.37%	12.86%

Non Current Assets Held for S_3

Non Current Assets Held for Sale (Details) - Schedule of other assets as assets held for sale - CLP ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Non Current Assets Held for Sale (Details) - Schedule of other assets as assets held for sale [Line Items]
Assets	[1]	$ 22,036	$ 22,394,000
Income			1,699,000	$ 3,771,000
Transbank S.A. [Member]
Non Current Assets Held for Sale (Details) - Schedule of other assets as assets held for sale [Line Items]
Participation %		25.00%
Assets		$ 19,093,000	19,093,000
Income			1,442,000
Nexus [Member]
Non Current Assets Held for Sale (Details) - Schedule of other assets as assets held for sale [Line Items]
Participation %
Assets			357,000
Income			136,000
Redbanc [Member]
Non Current Assets Held for Sale (Details) - Schedule of other assets as assets held for sale [Line Items]
Participation %		33.43%
Assets		$ 2,943,000	2,943,000
Income			$ 121,000
[1]	Corresponds to the interests in Redbanc S.A., Transbank S.A. and Nexus S.A., which have been reclassified as non-current assets classified as held for sale in accordance with IFRS 5 “Non-current assets held for sale and discontinued operations “, for additional information see Note 1 v) and Note 38.

Subsequent Events (Details)

Subsequent Events (Details) - CLP ($) $ in Millions	Jan. 07, 2021	Dec. 31, 2020	Dec. 31, 2019
Subsequent Events (Details) [Line Items]
Cash payments		$ 665,397	$ 861,178
Central Bank of Chile announced description		The Central Bank of Chile announced on January 27, 2021, a third stage of this financing mechanism called FCIC3. FCIC 3 will come into effect on March 1, 2021 and there will be an access limit per bank of US$ 2 billion.
Non-adjusting events after reporting period [member]
Subsequent Events (Details) [Line Items]
Cash payments	$ 3,689
Percentage of company contribution	100.00%
Non-adjusting events after reporting period [member] | Santander Asesorias Financieras Limitada [Member]
Subsequent Events (Details) [Line Items]
Cash payments	$ 0
Non-adjusting events after reporting period [member] | Banco Santander Brasil S,A, [Member]
Subsequent Events (Details) [Line Items]
Cash payments	$ 37