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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 28, 2024
Feb. 07, 2025
Jun. 29, 2024
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 28, 2024    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Entity Registrant Name Fortune Brands Innovations, Inc.    
Entity Central Index Key 0001519751    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Interactive Data Current Yes    
Document Financial Statement Error Correction [Flag] false    
Current Fiscal Year End Date --12-28    
Entity Filer Category Large Accelerated Filer    
Entity Well-known Seasoned Issuer Yes    
Entity Public Float     $ 8,071,063,938
Entity Common Stock, Shares Outstanding   122,576,651  
Entity Shell Company false    
Entity Small Business false    
Entity Emerging Growth Company false    
Title of 12(b) Security Common Stock, par value $0.01 per share    
Trading Symbol FBIN    
Security Exchange Name NYSE    
Entity File Number 1-35166    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 62-1411546    
Entity Address, Address Line One 520 Lake Cook Road    
Entity Address, City or Town Deerfield    
Entity Address, State or Province IL    
Entity Address, Postal Zip Code 60015-5611    
City Area Code 847    
Local Phone Number 484-4400    
Document Annual Report true    
Document Transition Report false    
ICFR Auditor Attestation Flag true    
Documents Incorporated by Reference Certain information contained in the registrant’s proxy statement for its Annual Meeting of Stockholders to be held on May 14, 2025 (to be filed not later than 120 days after the end of the registrant’s fiscal year) (the “2025 Proxy Statement”) is incorporated by reference into Part III hereof.    
Auditor Name PricewaterhouseCoopers LLP    
Auditor Firm ID 238    
Auditor Location Chicago, Illinois    
Auditor Opinion [Text Block]

Opinions on the Financial Statements and Internal Control over Financial Reporting

We have audited the accompanying consolidated balance sheets of Fortune Brands Innovations, Inc. and its subsidiaries (the "Company") as of December 28, 2024 and December 30, 2023, and the related consolidated statements of income, of comprehensive income, of equity and of cash flows for each of the three years in the period ended December 28, 2024, including the related notes and schedule of valuation and qualifying accounts for each of the three years in the period ended December 28, 2024 appearing after Item 16 and the signatures (collectively referred to as the "consolidated financial statements"). We also have audited the Company's internal control over financial reporting as of December 28, 2024, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 28, 2024 and December 30, 2023, and the results of its operations and its cash flows for each of the three years in the period ended December 28, 2024 in conformity with accounting principles generally accepted in the United States of America. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 28, 2024, based on criteria established in Internal Control - Integrated Framework (2013) issued by the COSO.