Shareholders' Equity - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 27, 2025	Sep. 28, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 7,204	$ 6,987
Other comprehensive income before reclassifications	130	9
Reclassified from Accumulated other comprehensive loss	1	3
Balance at end of period	7,493	6,951
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(304)	(644)
Balance at end of period	(173)	(632)
Pension and Postretirement Benefits Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(179)	(598)
Other comprehensive income before reclassifications	0	0
Reclassified from Accumulated other comprehensive loss	0	2
Balance at end of period	(179)	(596)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(120)	(49)
Other comprehensive income before reclassifications	132	12
Reclassified from Accumulated other comprehensive loss	(2)	0
Balance at end of period	10	(37)
Deferred Gains (Losses) on Hedge Contracts
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(5)	3
Other comprehensive income before reclassifications	(2)	(3)
Reclassified from Accumulated other comprehensive loss	3	1
Balance at end of period	$ (4)	$ 1

Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest.

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+ Details

TEXTRON INC 10-Q