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Unapproved Change Orders and Claims Against Clients (Schedule of Unapproved Change Orders and Claims) (Details) - USD ($)
$ in Millions
 9 Months Ended
Oct. 03, 2025
Sep. 27, 2024
Unapproved Change Orders [Roll Forward]    
Amounts included in project estimates-at-completion at beginning of fiscal year $ 104 $ 74
Net increase in project estimates 64 53
Approved change orders (128) 0
Ending balance of amounts included in project estimates-at-completion 40 127
Amounts recognized over time based on progress $ 33 $ 112