XBRL Cloud: Business Report

Rendering

Component: (Network and Table)
Network	00090 - Document - Document and Entity Information (http://www.ibm.com/role/DocumentDocumentAndEntityInformation)
Table	Document Information [Table]

Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0000051143 (http://www.sec.gov/CIK)

Document Information [Line Items]	Period [Axis]
	2021-01-01 - 2021-12-31																									2022-02-11	2021-06-30
	Entity Listings, Exchange [Axis]																									Entity Listings, Exchange [Axis]	Entity Listings, Exchange [Axis]
	New York Stock Exchange																							Chicago Stock Exchange	Exchange [Domain]	Exchange [Domain]	Exchange [Domain]
	Class of Stock [Axis]																							Class of Stock [Axis]	Class of Stock [Axis]	Class of Stock [Axis]	Class of Stock [Axis]
	Common Stock	2.625% Notes due 2022	1.250% Notes due 2023	0.375% Notes due 2023	1.125% Notes due 2024	2.875% Notes due 2025	0.950% Notes due 2025	0.875% Notes due 2025	0.300% Notes due 2026	1.250% Notes due 2027	0.300% Notes due 2028	1.750% Notes due 2028	1.500% Notes due 2029	0.875% Notes due 2030	1.750% Notes due 2031	0.650% Notes due 2032	1.250% Notes due 2034	1.200% Notes due 2040	7.00% Debentures due 2025	6.22% Debentures due 2027	6.50% Debentures due 2028	7.00% Debentures due 2045	7.125% Debentures due 2096	Common Stock	Class of Stock [Domain]	Class of Stock [Domain]	Class of Stock [Domain]
Document Type																									10-K
Document Annual Report																									true
Document Quarterly Report
Document Transition Report																									false
Document Period End Date																									2021-12-31
Entity File Number																									1-2360
Entity Registrant Name																									INTERNATIONAL BUSINESS MACHINES CORPORATION
Entity Incorporation, State or Country Code																									NY
Entity Tax Identification Number																									13-0871985
Entity Address, Address Line One																									One New Orchard Road
Entity Address, City or Town																									Armonk
Entity Address, State or Province																									NY
Entity Address, Postal Zip Code																									10504
City Area Code																									914
Local Phone Number																									499-1900
Entity Well-known Seasoned Issuer																									Yes
Entity Voluntary Filers																									No
Entity Current Reporting Status																									Yes
Entity Interactive Data Current																									Yes
Entity Filer Category																									Large Accelerated Filer
Entity Central Index Key																									0000051143
Amendment Flag																									false
Current Fiscal Year End Date																									--12-31
Entity Small Business																									false
Entity Emerging Growth Company																									false
Entity Ex Transition Period
ICFR Auditor Attestation Flag																									true
Entity Shell Company																									false
Entity Common Stock, Shares Outstanding																										899,309,986
Entity Public Float																											131,400,000,000
Document Fiscal Year Focus																									2021
Document Fiscal Period Focus																									FY
Title of 12(b) Security	Capital stock, par value $.20 per share	2.625% Notes due 2022	1.250% Notes due 2023	0.375% Notes due 2023	1.125% Notes due 2024	2.875% Notes due 2025	0.950% Notes due 2025	0.875% Notes due 2025	0.300% Notes due 2026	1.250% Notes due 2027	0.300% Notes due 2028	1.750% Notes due 2028	1.500% Notes due 2029	0.875% Notes due 2030	1.750% Notes due 2031	0.650% Notes due 2032	1.250% Notes due 2034	1.200% Notes due 2040	7.00% Debentures due 2025	6.22% Debentures due 2027	6.50% Debentures due 2028	7.00% Debentures due 2045	7.125% Debentures due 2096	Capital stock, par value $.20 per share
Trading Symbol	IBM	IBM 22A	IBM 23A	IBM 23B	IBM 24A	IBM 25A	IBM 25B	IBM 25C	IBM 26B	IBM 27B	IBM 28B	IBM 28A	IBM 29	IBM 30	IBM 31	IBM 32A	IBM 34	IBM 40	IBM 25	IBM 27	IBM 28	IBM 45	IBM 96	IBM
Security Exchange Name	NYSE	NYSE	NYSE	NYSE	NYSE	NYSE	NYSE	NYSE	NYSE	NYSE	NYSE	NYSE	NYSE	NYSE	NYSE	NYSE	NYSE	NYSE	NYSE	NYSE	NYSE	NYSE	NYSE	CHX
Amendment Description
Auditor Name																									PricewaterhouseCoopers LLP
Auditor Firm ID																									238
Auditor Location																									New York, New York