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Information on Business Segments - Summary of Financial Information for Each Business Segment (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 29, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 24, 2018 | Mar. 25, 2018 | Mar. 26, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Net sales |  |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 15,878 | $ 15,171 | $ 14,427 | $ 14,336 | $ 14,411 | $ 14,318 | $ 13,398 | $ 11,635 |  | $ 59,812 | $ 53,762 | $ 49,960
Operating profit |  |  |  |  |  |  |  |  |  |  |  |
Operating profit | $ 2,149 | $ 2,105 | $ 2,008 | 2,283 | 1,851 | $ 1,963 | 1,795 | $ 1,725 |  | 8,545 | 7,334 | 6,744
Unallocated items |  |  |  |  |  |  |  |  |  |  |  |
Severance and restructuring charges |  |  |  |  |  |  |  |  |  | 0 | 96 | 0
Gain on property sale |  |  |  |  |  |  |  |  |  | 51 | 0 | 198
Net gain on divestiture of business segment |  |  |  |  |  |  |  |  |  | 0 | 0 | 73
AMMROC |  |  |  |  |  |  |  |  |  |  |  |
Unallocated items |  |  |  |  |  |  |  |  |  |  |  |
Equity method investee impairment |  |  |  |  | $ 110 |  |  |  | $ 64 |  |  |
Land |  |  |  |  |  |  |  |  |  |  |  |
Unallocated items |  |  |  |  |  |  |  |  |  |  |  |
Gain on property sale |  |  |  | $ 51 |  |  |  |  |  |  |  | 198
Operating Segments |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 59,812 | 53,762 | 49,960
Operating profit |  |  |  |  |  |  |  |  |  |  |  |
Operating profit |  |  |  |  |  |  |  |  |  | 6,574 | 5,877 | 5,092
Segment Reconciling Items |  |  |  |  |  |  |  |  |  |  |  |
Unallocated items |  |  |  |  |  |  |  |  |  |  |  |
FAS/CAS operating adjustment |  |  |  |  |  |  |  |  |  | 2,049 | 1,803 | 1,613
Stock-based compensation |  |  |  |  |  |  |  |  |  | 189 | 173 | 158
Severance and restructuring charges |  |  |  |  |  |  |  |  |  | 0 | (96) | 0
Other, net |  |  |  |  |  |  |  |  |  | 111 | (77) | 197
Total unallocated, net |  |  |  |  |  |  |  |  |  | 1,971 | 1,457 | 1,652
Aeronautics |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 23,693 | 21,242 | 19,410
Aeronautics | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 23,693 | 21,242 | 19,410
Operating profit |  |  |  |  |  |  |  |  |  |  |  |
Operating profit |  |  |  |  |  |  |  |  |  | 2,521 | 2,272 | 2,176
Missiles and Fire Control |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 10,131 | 8,462 | 7,282
Missiles and Fire Control | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 10,131 | 8,462 | 7,282
Operating profit |  |  |  |  |  |  |  |  |  |  |  |
Operating profit |  |  |  |  |  |  |  |  |  | 1,441 | 1,248 | 1,034
Rotary and Mission Systems |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 15,128 | 14,250 | 13,663
Unallocated items |  |  |  |  |  |  |  |  |  |  |  |
Severance and restructuring charges |  |  |  |  |  |  | $ 96 |  |  | 60 |  |
Rotary and Mission Systems | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 15,128 | 14,250 | 13,663
Operating profit |  |  |  |  |  |  |  |  |  |  |  |
Operating profit |  |  |  |  |  |  |  |  |  | 1,421 | 1,302 | 902
Space |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 10,860 | 9,808 | 9,605
Space | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 10,860 | 9,808 | 9,605
Operating profit |  |  |  |  |  |  |  |  |  |  |  |
Operating profit |  |  |  |  |  |  |  |  |  | 1,191 | $ 1,055 | $ 980
Disposed of by Sale | Distributed Energy Solutions |  |  |  |  |  |  |  |  |  |  |  |
Unallocated items |  |  |  |  |  |  |  |  |  |  |  |
Net gain on divestiture of business segment |  |  |  |  |  |  |  |  |  | $ 34 |  |

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