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Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions | Jul. 04, 2021 | Dec. 31, 2020
--- | --- | ---
Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | [1] | $ 4,121 | $ 4,210
Accumulated Amortization |  | (2,118) | (2,093)
Net Carrying Amount |  | 2,003 | 2,117
Contract and program intangible assets |  |  |
Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | [1],[2] | 3,406 | 3,399
Accumulated Amortization | [2] | (1,699) | (1,600)
Net Carrying Amount | [2] | 1,707 | 1,799
Trade names and trademarks |  |  |
Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | [1] | 498 | 516
Accumulated Amortization |  | (229) | (229)
Net Carrying Amount |  | 269 | 287
Technology and software |  |  |
Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | [1] | 131 | 134
Accumulated Amortization |  | (107) | (106)
Net Carrying Amount |  | 24 | 28
Other intangible assets |  |  |
Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | [1] | 86 | 161
Accumulated Amortization |  | (83) | (158)
Net Carrying Amount |  | $ 3 | $ 3
[1] | Changes in gross carrying amounts consisted primarily of adjustments for write-offs of fully amortized intangible assets, acquired intangible assets and foreign currency translation.
[2] | Consisted of acquired backlog and probable follow-on work and associated customer relationships.

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