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OTHER - Changes in Estimates (Details) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Feb. 29, 2020 satellite | Jun. 28, 2020 USD ($) $ / shares | Jun. 30, 2019 USD ($) $ / shares | Jun. 28, 2020 USD ($) satellite $ / shares | Jun. 30, 2019 USD ($) $ / shares | Dec. 31, 2019 satellite | Jun. 27, 2020 USD ($)
Change in Accounting Estimate [Line Items] |  |  |  |  |  |  |
Performance obligation satisfied in previous period |  | $ 495 | $ 560 | $ 1,000 | $ 1,200 |  |
Number of satellites launched or to be launched | satellite | 1 |  |  | 3 |  | 2 |
Equity method investment impairment |  | 128 |  | $ 128 | 0 |  |
AMMROC |  |  |  |  |  |  |
Change in Accounting Estimate [Line Items] |  |  |  |  |  |  |
Equity method investment impairment |  |  |  | 128 |  |  |
Equity method investment other than temporary impairment net of tax |  |  |  | $ 96 |  |  |
Equity method investment other than temporary impairment earnings per share (in dollars per share) | $ / shares |  |  |  | $ 0.34 |  |  |
Equity method investments |  | 307 |  | $ 307 |  |  | $ 435
Ground Based Radar |  |  |  |  |  |  |
Change in Accounting Estimate [Line Items] |  |  |  |  |  |  |
Cumulative losses on development |  | 240 |  | 240 |  |  |
EADGE-T |  |  |  |  |  |  |
Change in Accounting Estimate [Line Items] |  |  |  |  |  |  |
Cumulative losses on development |  | 260 |  | 260 |  |  |
LM 2100 Project |  |  |  |  |  |  |
Change in Accounting Estimate [Line Items] |  |  |  |  |  |  |
Cumulative losses on development |  | 410 |  | 410 |  |  |
Warrior Capability Sustainment Program |  |  |  |  |  |  |
Change in Accounting Estimate [Line Items] |  |  |  |  |  |  |
Cumulative losses on development |  | 140 |  | 140 |  |  |
Contracts Accounted for under Percentage of Completion |  |  |  |  |  |  |
Change in Accounting Estimate [Line Items] |  |  |  |  |  |  |
Increase in operating profit due to profit rate adjustments |  | 480 | 420 | 945 | 985 |  |
Increase in net earnings due to profit rate adjustments |  | $ 379 | $ 332 | $ 747 | $ 778 |  |
Increase in diluted earnings per common share due to profit rate adjustments (in dollars per share) | $ / shares |  | $ 1.35 | $ 1.17 | $ 2.65 | $ 2.74 |  |
Space |  |  |  |  |  |  |
Change in Accounting Estimate [Line Items] |  |  |  |  |  |  |
Number of commercial satellite programs with performance issues | satellite |  |  |  |  |  | 2 |

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