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Cover Page - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Feb. 10, 2023
Jun. 30, 2022
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2022    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Trading Symbol AMWL    
Entity Registrant Name American Well Corporation    
Entity Central Index Key 0001393584    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer Yes    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Document Annual Report true    
Document Transition Report false    
ICFR Auditor Attestation Flag true    
Security Exchange Name NYSE    
Title of 12(b) Security Class A common stock, par value of $0.01 per share    
Entity File Number 001-39515    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 20-5009396    
Entity Address, Address Line One 75 State Street    
Entity Address, Address Line Two 26th Floor    
Entity Address, City or Town Boston    
Entity Address, State or Province MA    
Entity Address, Postal Zip Code 02109    
City Area Code 617    
Local Phone Number 204-3500    
Entity Public Float     $ 868
Auditor Firm ID 238    
Auditor Name PricewaterhouseCoopers LLP    
Auditor Location Boston, Massachusetts, United States    
Documents Incorporated by Reference

The Registrant intends to file a definitive proxy statement pursuant to Regulation 14A relating to the 2023 Annual Meeting of Stockholders within 120 days of the end of the Registrant’s fiscal year ended December 31, 2022. Portions of such definitive proxy statement are incorporated by reference into Part III of this Annual Report on Form 10-K to the extent stated herein.

    
Common Class A [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   244,647,353  
Common Class B [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   27,390,397  
Common Class C [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   5,555,555