v3.26.3
Segment Financial Information - Revenue and Disbursement of Costs and Expenses by Segments (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Oct. 03, 2026
Sep. 27, 2025
Oct. 03, 2026
Sep. 27, 2025
Segment Reporting [Line Items]        
Revenues $ 3,751 $ 3,602 $ 11,273 $ 10,624
Costs, expenses and other        
Research and development costs 110 118 346 387
Selling and administrative expense 271 257 903 858
Interest expense, net 32 30 99 90
Operating Segment        
Segment Reporting [Line Items]        
Revenues 3,751 3,602 11,273 10,624
Costs, expenses and other        
Cost of products/services sold 3,043 2,892 9,104 8,488
Research and development costs 107 116 339 372
Selling and administrative expense 242 230 789 749
Interest expense, net 4 4 13 13
Segment profit (loss) 355 360 1,028 1,002
Textron Aviation        
Segment Reporting [Line Items]        
Revenues 1,680 1,479 4,709 4,217
Bell        
Segment Reporting [Line Items]        
Revenues 933 1,026 3,077 3,025
Textron Systems        
Segment Reporting [Line Items]        
Revenues 360 310 1,045 933
Industrial        
Segment Reporting [Line Items]        
Revenues 765 761 2,399 2,392
Finance        
Segment Reporting [Line Items]        
Revenues 13 26 43 57
Manufacturing group | Textron Aviation | Operating Segment        
Segment Reporting [Line Items]        
Revenues 1,680 1,479 4,709 4,217
Costs, expenses and other        
Cost of products/services sold 1,334 1,153 3,691 3,264
Research and development costs 56 55 170 174
Selling and administrative expense 111 99 350 315
Interest expense, net 0 0 0 0
Segment profit (loss) 179 172 498 464
Manufacturing group | Bell | Operating Segment        
Segment Reporting [Line Items]        
Revenues 933 1,026 3,077 3,025
Costs, expenses and other        
Cost of products/services sold 783 846 2,604 2,490
Research and development costs 24 33 88 110
Selling and administrative expense 50 55 162 163
Interest expense, net 0 0 0 0
Segment profit (loss) 76 92 223 262
Manufacturing group | Textron Systems | Operating Segment        
Segment Reporting [Line Items]        
Revenues 360 310 1,045 933
Costs, expenses and other        
Cost of products/services sold 272 238 797 703
Research and development costs 10 13 29 39
Selling and administrative expense 21 12 76 66
Interest expense, net 0 0 0 0
Segment profit (loss) 57 47 143 125
Manufacturing group | Industrial | Operating Segment        
Segment Reporting [Line Items]        
Revenues 765 761 2,399 2,392
Costs, expenses and other        
Cost of products/services sold 654 655 2,012 2,031
Research and development costs 17 15 52 49
Selling and administrative expense 56 60 198 197
Interest expense, net 0 0 0 0
Segment profit (loss) 38 31 137 115
Finance group        
Segment Reporting [Line Items]        
Revenues 13 26 43 57
Finance group | Finance | Operating Segment        
Segment Reporting [Line Items]        
Revenues 13 26 43 57
Costs, expenses and other        
Cost of products/services sold 0 0 0 0
Research and development costs 0 0 0 0
Selling and administrative expense 4 4 3 8
Interest expense, net 4 4 13 13
Segment profit (loss) $ 5 $ 18 $ 27 $ 36