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Cover - USD ($)
 12 Months Ended
Dec. 31, 2023
Jan. 31, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 1-5794    
Entity Registrant Name Masco Corporation    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 38-1794485    
Entity Address, Address Line One 17450 College Parkway,    
Entity Address, City or Town Livonia,    
Entity Address, State or Province MI    
Entity Address, Postal Zip Code 48152    
City Area Code 313    
Local Phone Number 274-7400    
Title of 12(b) Security Common Stock, $1.00 par value    
Trading Symbol MAS    
Security Exchange Name NYSE    
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 Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 12,869,087,500
Entity Common Stock, Shares Outstanding   219,764,935  
Documents Incorporated by Reference
Portions of the Registrant's definitive Proxy Statement to be filed for its 2024 Annual Meeting of Stockholders are incorporated by reference into Part III of this Form 10-K.
    
Entity Central Index Key 0000062996    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Amendment Flag false