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DOCUMENT AND ENTITY INFORMATION
12 Months Ended
Dec. 31, 2020
shares
Document Information [Line Items]  
Entity Registrant Name BROOKFIELD ASSET MANAGEMENT INC.
Entity Central Index Key 0001001085
Current Fiscal Year End Date --12-31
Document Type 40-F
Document Period End Date Dec. 31, 2020
Document Fiscal Year Focus 2020
Document Fiscal Period Focus FY
Amendment Flag false
Entity Emerging Growth Company false
Class A Limited Voting Shares [Member]  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding (in shares) 1,510,635,291
Class B Limited Voting Shares [Member]  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding (in shares) 85,120