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Other - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 25, 2016 | Sep. 22, 2016 | Feb. 20, 2015 | Oct. 27, 2016 | Sep. 25, 2016 | May 31, 2016 | Sep. 25, 2016 | Mar. 27, 2016 | Dec. 31, 2015 | Sep. 27, 2015 | Sep. 25, 2016 | Sep. 27, 2015 | Dec. 31, 2016 | Aug. 16, 2016
Increase in operating profit due to profit rate adjustments from continuing operations |  |  |  |  |  |  | $ 405 |  |  | $ 390 | $ 1,100 | $ 1,300 |  |
Increase in net earnings due to profit rate adjustments |  |  |  |  |  |  | $ 265 |  |  | $ 255 | $ 730 | $ 865 |  |
Increase in diluted earnings per common share due to profit rate adjustments |  |  |  |  |  |  | $ 0.88 |  |  | $ 0.82 | $ 2.39 | $ 2.73 |  |
Repayment of long-term notes |  |  |  |  |  |  |  |  |  |  | $ 952 |  |  |
Severance charges |  |  |  |  |  |  |  |  | $ 82 | $ 82 | $ 99 | $ 35 |  |
Effective income tax rate for earnings from continuing operations |  |  |  |  |  |  | 23.70% |  |  | 30.60% | 23.10% | 30.40% |  |
Cash paid for repurchases of common stock |  |  |  |  |  |  |  |  |  |  | $ 1,280 | $ 2,364 |  |
Number of shares of common stock repurchased with cash |  |  |  |  |  |  |  |  |  |  | 5,700,000 |  |  |
Remaining authorized repurchase amount under share repurchase program | $ 4,300 |  |  |  | $ 4,300 |  | $ 4,300 |  |  |  | $ 4,300 |  |  |
Additional paid-in capital | $ 0 |  |  |  | $ 0 |  | $ 0 |  | $ 0 |  | $ 0 |  |  |
Common stock par value, per share | $ 1 |  |  |  | $ 1 |  | $ 1 |  | $ 1 |  | $ 1 |  |  |
Additional share repurchase program authorized amount |  | $ 2,000 |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared |  |  |  |  |  |  | $ 537 |  |  | $ 507 | $ 2,056 | $ 1,926 |  |
Dividends declared, per share (in USD) |  |  |  |  |  |  | $ 1.82 |  |  | $ 1.65 | $ 6.77 | $ 6.15 |  |
Quarterly increase dividend rate |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |
Increase quarterly dividend, per share |  | $ 0.17 |  |  |  |  |  |  |  |  |  |  |  |
Deferred income taxes assets, noncurrent | $ 5,850 |  |  |  | $ 5,850 |  | $ 5,850 |  | $ 6,068 |  | $ 5,850 |  |  |
Variable Interest Rate Swap | Designated as hedges |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate notional amount of derivatives |  |  |  |  |  | $ 450 |  |  |  |  |  |  |  |
Sikorsky Aircraft Corporation |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring cost expected in 2016 | 40 |  |  |  | 40 |  | 40 |  |  |  | 40 |  |  |
Restructuring cost incurred |  |  |  |  |  |  |  |  |  |  | $ 35 |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of stock units, granted, in shares |  |  |  |  |  |  |  |  |  |  | 700,000 |  |  |
Average grant date fair value per unit |  |  |  |  |  |  |  |  |  |  | $ 206.69 |  |  |
Number of years over which equity awards vest |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |
Scenario, Forecast | Sikorsky Aircraft Corporation |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring cost expected to be incurred |  |  |  |  |  |  |  |  |  |  |  |  | $ 5 |
Accounting Standards Update 2016-09 | Adjustments for New Accounting Principle, Early Adoption |  |  |  |  |  |  |  |  |  |  |  |  |  |
Excess income tax benefit from share-based compensation, financing activities |  |  |  |  |  |  | 104 |  |  |  |  |  |  |
Excess income tax benefit recognized in additional paid-in capital |  |  |  |  |  |  | 104 |  |  |  |  |  |  |
Accounting Standards Update 2016-09 | Restatement Adjustment | Adjustments for New Accounting Principle, Early Adoption |  |  |  |  |  |  |  |  |  |  |  |  |  |
Excess income tax benefit from share-based compensation, operating activities |  |  |  |  |  |  | 22 |  |  |  | $ 137 |  |  |
Additional income tax benefit |  |  |  |  |  |  | $ 22 |  |  |  | $ 137 |  |  |
Additional income tax benefit, per share |  |  |  |  |  |  | $ 0.07 |  |  |  | $ 0.45 |  |  |
Accounting Standards Update 2015-17 | Restatement Adjustment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred income taxes assets, noncurrent |  |  |  |  |  |  |  |  | 1,600 |  |  |  |  |
Deferred income taxes liabilities, noncurrent |  |  |  |  |  |  |  |  | 140 |  |  |  |  |
Accounting Standards Update 2015-17 | Scenario, Previously Reported |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred income taxes assets, current |  |  |  |  |  |  |  |  | 1,600 |  |  |  |  |
Deferred income taxes liabilities, current |  |  |  |  |  |  |  |  | 140 |  |  |  |  |
2016 Fourth Quarter Dividend |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared |  |  |  |  |  |  |  |  |  |  | $ 537 |  |  |
Dividends declared, per share (in USD) |  |  |  |  |  |  |  |  |  |  | $ 1.82 |  |  |
2015 Fourth Quarter Dividend |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared |  |  |  |  |  |  |  |  |  |  |  | $ 507 |  |
Dividends declared, per share (in USD) |  |  |  |  |  |  |  |  |  |  |  | $ 1.65 |  |
2016 Action |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance charges |  |  |  |  |  |  | $ 31 |  |  |  |  |  |  |
Severance payments | 56 |  |  |  |  |  |  |  |  |  |  |  |  |
2015 Action |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance charges |  |  |  |  |  |  | $ 25 |  |  |  |  |  |  |
Severance payments | $ 45 |  |  |  |  |  |  |  |  |  |  |  |  |
Aeronautics |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance charges |  |  |  |  |  |  |  | $ 80 |  |  |  |  |  |
Information Systems & Global Solutions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance charges |  |  |  |  |  |  |  |  | 15 | $ 15 |  |  |  |
Information Systems & Global Solutions | Net earnings from discontinued operations |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance charges |  |  |  |  |  |  |  | $ 19 | 20 | 20 |  |  |  |
Rotary and Mission Systems |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance charges |  |  |  |  |  |  |  |  | $ 67 | $ 67 |  |  |  |
Information Systems & Global Solutions |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of reduction in common stock outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.00%
Information Systems & Global Solutions | Lockheed Martin |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common stock exchanged |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,369,694
2.13% Long-term notes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of long-term notes |  |  |  |  | $ 500 |  |  |  |  |  |  |  |  |
Long-term notes, fixed Interest | 2.13% |  |  |  | 2.13% |  | 2.13% |  |  |  | 2.13% |  |  |
7.65% Long-term notes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of long-term notes |  |  |  |  |  | $ 452 |  |  |  |  |  |  |  |
Long-term notes, fixed Interest |  |  |  |  |  | 7.65% |  |  |  |  |  |  |  |
February Twenty Fifteen Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of issued debt |  |  | $ 2,250 |  |  |  |  |  |  |  |  |  |  |
2.90% Notes Due 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of issued debt |  |  | $ 750 |  |  |  |  |  |  |  |  |  |  |
Long-term debt maturity year |  |  | 2025 |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  | 2.90% |  |  |  |  |  |  |  |  |  |  |
3.60% Notes Due 2035 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of issued debt |  |  | $ 500 |  |  |  |  |  |  |  |  |  |  |
Long-term debt maturity year |  |  | 2035 |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  | 3.60% |  |  |  |  |  |  |  |  |  |  |
3.80% Notes Due 2045 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of issued debt |  |  | $ 1,000 |  |  |  |  |  |  |  |  |  |  |
Long-term debt maturity year |  |  | 2045 |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  | 3.80% |  |  |  |  |  |  |  |  |  |  |
Five Year Revolving Credit Facility | Unsecured Debt | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility |  |  |  | $ 2,500 |  |  |  |  |  |  |  |  |  |
Line of credit facility expiration period |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |
Line of credit facility extended expiration period |  |  |  | 1 year |  |  |  |  |  |  |  |  |  |
Line of credit facility expiration date |  |  |  | Oct. 09, 2020 |  |  |  |  |  |  |  |  |  |
Line of credit facility extended expiration date |  |  |  | Oct. 09, 2021 |  |  |  |  |  |  |  |  |  |

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