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Cover Page
 12 Months Ended
Dec. 31, 2021
shares
Entity Information [Line Items]  
Document Type 40-F
Document Registration Statement false
Document Annual Report true
Entity Central Index Key 0001453015
Entity Primary SIC Number 3620
Entity Registrant Name Ballard Power Systems Inc.
Entity Incorporation, State or Country Code A1
Entity Address, Address Line One 9000 Glenlyon Parkway
Entity Address, City or Town Burnaby
Entity Address, State or Province BC
Entity Address, Country CA
Entity Address, Postal Zip Code V5J 5J8
City Area Code 604
Local Phone Number 454-0900
Title of 12(b) Security Common Shares
Trading Symbol BLDP
Security Exchange Name NASDAQ
Security Reporting Obligation 15(d)
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Emerging Growth Company false
Amendment Flag false
Document Fiscal Year Focus 2021
Document Fiscal Period Focus FY
Entity Common Stock, Shares Outstanding 297,700,295
Entity File Number 000-53543
ICFR Auditor Attestation Flag true
Document Period End Date Dec. 31, 2021
Current Fiscal Year End Date --12-31
Annual Information Form true
Audited Annual Financial Statements true
Business Contact  
Entity Information [Line Items]  
Entity Address, Address Line One 28 Liberty St.
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10005
City Area Code 212
Local Phone Number 894-8940
Contact Personnel Name C T Corporation System