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Changes in Estimates (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jul. 02, 2021
Jul. 03, 2020
Jul. 02, 2021
Jul. 03, 2020
Change in Accounting Estimate [Line Items]        
Revenue recognized from performance obligations satisfied in prior periods $ 107 $ 102 $ 215 $ 238
Contracts Accounted for under Percentage of Completion        
Change in Accounting Estimate [Line Items]        
Net EAC adjustments, before income taxes 80 98 162 201
Net EAC adjustments, net of income taxes $ 60 $ 73 $ 122 $ 151
Net EAC adjustments, net of income taxes, per diluted common share (in dollars per share) $ 0.29 $ 0.34 $ 0.59 $ 0.69