OTHER - Contract Estimates - Consolidated Net Profit Booking Rate Adjustments (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2025	Sep. 29, 2024	Sep. 28, 2025	Sep. 29, 2024
Accounting Policies [Abstract]
Sales	$ 371	$ 358	$ 681	$ 1,013
Segment operating profit	$ 365	$ 375	$ (200)	$ 990
% of segment operating profit	18.00%	20.00%	(4.00%)	18.00%
Net earnings	$ 288	$ 296	$ (158)	$ 782
Diluted earnings per share (in dollars per share)	$ 1.24	$ 1.24	$ (0.67)	$ 3.26