Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Mar. 30, 2021	Jun. 30, 2020
Cover [Abstract]
Entity Registrant Name	Madison Technologies Inc.
Entity Central Index Key	0001318268
Document Type	10-K/A
Amendment Description	Madison Technologies, Inc. (hereinafter referred to as “us,” “we,” or the “Company”) is filing this Amendment No. 1 on Form 8-K/A (the “First Amendment”) to its Annual Report on Form 10-K for the fiscal year ended December 31, 2020, which was filed with the Securities and Exchange Commission (“SEC”) on April 15, 2021 (the “Original Report”) to amend and restate the filing in its entirety and to, among other things, (i) include disclosure of the exchange of our series A preferred stock and convertible debt for shares of preferred stock of CZJ License, Inc, our wholly owned subsidiary which was inadvertently not included, (ii) include disclosure about certain legal proceedings regarding Mr. Falcone which was inadvertently not included, (ii) update our security ownership table to include our preferred stock that was issued in February 2021 which was inadvertently not included and (iv) attach exhibits which were previously referenced in our Current Report on Form 8-K filed with the SEC on February 23, 2021. Except as described above, no other information in the Original Filing has been updated and this First Amendment continues to speak as of the date of the Original Filing. Other events occurring after the filing of the Original Filing or other disclosure necessary to reflect subsequent events will be addressed in other reports filed with or furnished to the SEC subsequent to the date of the filing of the Original Filing.
Document Period End Date	Dec. 31, 2020
Amendment Flag	true
Current Fiscal Year End Date	--12-31
Entity a Well-known Seasoned Issuer	No
Entity Voluntary Filer	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	No
Entity Filer Category	Non-accelerated Filer
Entity Small Business Flag	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 564,867
Entity Common Stock, Shares Outstanding		23,472,565
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2020