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Basis of Presentation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 26, 2017 | Mar. 27, 2016 | Aug. 24, 2016
Basis of Presentation [Line Items] |  |  |
Income Tax Expense (Benefit) | $ 232 | $ 188 |
AWE Management Limited |  |  |
Basis of Presentation [Line Items] |  |  |
Ownership interest percentage acquired |  |  | 18.00%
Noncontrolling Interest, Ownership Percentage by Parent |  |  | 51.00%
AWE Management Limited | Net Sales | Segment Concentration Risk | Space Systems |  |  |
Basis of Presentation [Line Items] |  |  |
Concentration percentage | 100.00% |  |
AWE Management Limited | Net Sales | Equity Method Investment Risk | Space Systems |  |  |
Basis of Presentation [Line Items] |  |  |
Concentration percentage |  | 0.00% |
AWE Management Limited | Operating profit | Segment Concentration Risk | Space Systems |  |  |
Basis of Presentation [Line Items] |  |  |
Concentration percentage | 51.00% |  |
AWE Management Limited | Net Earnings | Equity Method Investment Risk | Space Systems |  |  |
Basis of Presentation [Line Items] |  |  |
Concentration percentage |  | 33.00% |
Adjustments for New Accounting Principle, Early Adoption |  |  |
Basis of Presentation [Line Items] |  |  |
Income Tax Expense (Benefit) |  | $ 104 |
Income tax benefit per share |  | $ 0.34 |

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