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Information on Business Segments - Summary of Financial Information for Each Business Segment, Intersegment Sale, Depreciation and Capital Expenditures (Details) - 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 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 15,878 | $ 15,171 | $ 14,427 | $ 14,336 | $ 14,411 | $ 14,318 | $ 13,398 | $ 11,635 | $ 59,812 | $ 53,762 | $ 49,960
Depreciation and amortization |  |  |  |  |  |  |  |  | 1,189 | 1,161 | 1,195
Capital expenditures |  |  |  |  |  |  |  |  | 1,484 | 1,278 | 1,177
Aeronautics |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 23,693 | 21,242 | 19,410
MFC |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 10,131 | 8,462 | 7,282
Rotary and Mission Systems |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 15,128 | 14,250 | 13,663
Space |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 10,860 | 9,808 | 9,605
Intersegment sales |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 2,956 | 2,539 | 2,389
Intersegment sales | Aeronautics |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 217 | 120 | 122
Intersegment sales | MFC |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 515 | 423 | 355
Intersegment sales | Rotary and Mission Systems |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 1,872 | 1,759 | 1,801
Intersegment sales | Space |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 352 | 237 | 111
Operating Segments |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 59,812 | 53,762 | 49,960
Depreciation and amortization |  |  |  |  |  |  |  |  | 1,119 | 1,096 | 1,123
Capital expenditures |  |  |  |  |  |  |  |  | 1,356 | 1,214 | 1,014
Operating Segments | Aeronautics |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 23,693 | 21,242 | 19,410
Depreciation and amortization |  |  |  |  |  |  |  |  | 318 | 304 | 311
Capital expenditures |  |  |  |  |  |  |  |  | 526 | 460 | 371
Operating Segments | MFC |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 10,131 | 8,462 | 7,282
Depreciation and amortization |  |  |  |  |  |  |  |  | 124 | 105 | 99
Capital expenditures |  |  |  |  |  |  |  |  | 300 | 244 | 156
Operating Segments | Rotary and Mission Systems |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 15,128 | 14,250 | 13,663
Depreciation and amortization |  |  |  |  |  |  |  |  | 464 | 458 | 468
Capital expenditures |  |  |  |  |  |  |  |  | 272 | 255 | 308
Operating Segments | Space |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 10,860 | 9,808 | 9,605
Depreciation and amortization |  |  |  |  |  |  |  |  | 213 | 229 | 245
Capital expenditures |  |  |  |  |  |  |  |  | 258 | 255 | 179
Corporate activities |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 70 | 65 | 72
Capital expenditures |  |  |  |  |  |  |  |  | $ 128 | $ 64 | $ 163

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