v3.26.1
Segment Financial Information - Revenue and Disbursement of Costs and Expenses by Segments (Details) - USD ($)
$ in Millions
 3 Months Ended
Apr. 04, 2026
Mar. 29, 2025
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Revenues $ 3,695 $ 3,306
Costs, expenses and other    
Research and development costs 120 132
Selling and administrative expense 321 298
Interest expense, net 34 29
Operating Segment    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Revenues 3,695 3,306
Costs, expenses and other    
Cost of products/services sold 2,976 2,635
Research and development costs 118 123
Selling and administrative expense 276 254
Interest expense, net 5 4
Segment profit (loss) 320 290
Textron Aviation    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Revenues 1,485 1,216
Bell    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Revenues 1,070 983
Textron Systems    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Revenues 338 299
Industrial    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Revenues 786 792
Finance    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Revenues 16 16
Manufacturing group | Textron Aviation | Operating Segment    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Revenues 1,485 1,216
Costs, expenses and other    
Cost of products/services sold 1,153 933
Research and development costs 56 60
Selling and administrative expense 122 101
Interest expense, net 0 0
Segment profit (loss) 154 122
Manufacturing group | Bell | Operating Segment    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Revenues 1,070 983
Costs, expenses and other    
Cost of products/services sold 904 803
Research and development costs 37 39
Selling and administrative expense 57 51
Interest expense, net 0 0
Segment profit (loss) 72 90
Manufacturing group | Textron Systems | Operating Segment    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Revenues 338 299
Costs, expenses and other    
Cost of products/services sold 258 221
Research and development costs 9 10
Selling and administrative expense 29 30
Interest expense, net 0 0
Segment profit (loss) 42 38
Manufacturing group | Industrial | Operating Segment    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Revenues 786 792
Costs, expenses and other    
Cost of products/services sold 661 678
Research and development costs 16 14
Selling and administrative expense 69 70
Interest expense, net 0 0
Segment profit (loss) 40 30
Finance group    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Revenues 16 16
Finance group | Finance | Operating Segment    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Revenues 16 16
Costs, expenses and other    
Cost of products/services sold 0 0
Research and development costs 0 0
Selling and administrative expense (1) 2
Interest expense, net 5 4
Segment profit (loss) $ 12 $ 10