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Unapproved Change Orders and Claims Against Clients (Schedule of Unapproved Change Orders and Claims) (Details) - USD ($)
$ in Millions
 6 Months Ended
Jul. 04, 2025
Jun. 28, 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 57 41
Approved change orders (128) 0
Ending balance of amounts included in project estimates-at-completion 33 115
Amounts recognized over time based on progress $ 31 $ 91