v3.25.4
Debt and Credit Facilities - Narrative (Details)
12 Months Ended
Oct. 16, 2025
USD ($)
extension_option
Jan. 03, 2026
USD ($)
Dec. 28, 2024
USD ($)
Dec. 30, 2023
USD ($)
Debt Instrument [Line Items]        
Minimum fixed charge coverage required to be maintained by subsidiary   125.00%    
Minimum shareholders equity required to be maintained by subsidiary   $ 125,000,000    
Cash paid to TFC to maintain compliance with covenants   0 $ 0 $ 0
Floating Rate Junior Subordinated Notes | Finance group | Floating Rate Junior Subordinated Notes        
Debt Instrument [Line Items]        
Debt instrument, face amount   $ 264,000,000    
Debt instrument, maturity date   Feb. 15, 2067    
Debt Instrument call date latest   Feb. 15, 2042    
Debt instrument description of variable rate basis after specified term at fixed rate   three-month CME Term Secured Overnight Financing Rate    
Interest rate spread   1.99661%    
Senior Unsecured Revolving Credit Facility Expires October 2030 | Line of Credit        
Debt Instrument [Line Items]        
Maximum borrowing capacity $ 1,000,000,000.0      
Portion available for issuance of letters of credit against facility 100,000,000      
Borrowing capacity Textron may elect to increase to $ 1,300,000,000      
Number of one-year extensions | extension_option 2      
Extension period (in years) 1 year      
Amount borrowed against facility   $ 0    
Senior Unsecured Revolving Credit Facility Expires October 2027 | Line of Credit        
Debt Instrument [Line Items]        
Term of facility 5 years      
Amount borrowed against facility     0  
Letter of Credit | Line of Credit        
Debt Instrument [Line Items]        
Outstanding letters of credit   $ 0 $ 9,000,000