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Goodwill and Other Intangible Assets - Goodwill by Business Segment (Details) - USD ($) $ in Millions | 9 Months Ended
--- | ---
Oct. 01, 2021 | Oct. 02, 2020
Changes in the carrying amount of goodwill |  |
Beginning Balance | $ 18,876 | $ 20,001
Goodwill decrease from divestitures | (553) | (541)
Decrease from reclassification to assets of businesses held for sale | (11) |
Impairment of goodwill | (62) | (369)
Currency translation adjustments | (43) | (8)
Other (including adjustments to previously estimated fair value of assets acquired and liabilities assumed) |  | (91)
Ending Balance | 18,207 | 18,992
Disposed of by Sale | CPS, Military Training, Electronic Devices and VSE businesses |  |
Changes in the carrying amount of goodwill |  |
Goodwill decrease from divestitures | (553) |
Disposed of by Sale | Applied Kilovolts and Analytical Instrumentation and EOTech businesses |  |
Changes in the carrying amount of goodwill |  |
Goodwill decrease from divestitures |  | (541)
Held-for-sale |  |
Changes in the carrying amount of goodwill |  |
Decrease from reclassification to assets of businesses held for sale | (11) |
Integrated Mission Systems |  |
Changes in the carrying amount of goodwill |  |
Beginning Balance | 6,499 | 5,768
Goodwill decrease from divestitures | 0 | 0
Decrease from reclassification to assets of businesses held for sale | 0 |
Impairment of goodwill | 0 | 0
Currency translation adjustments | (8) | (3)
Other (including adjustments to previously estimated fair value of assets acquired and liabilities assumed) |  | 740
Ending Balance | 6,491 | 6,505
Space and Airborne Systems |  |
Changes in the carrying amount of goodwill |  |
Beginning Balance | 5,232 | 5,131
Goodwill decrease from divestitures | 0 | (2)
Decrease from reclassification to assets of businesses held for sale | 0 |
Impairment of goodwill | 0 | (5)
Currency translation adjustments | (23) | (4)
Other (including adjustments to previously estimated fair value of assets acquired and liabilities assumed) |  | 112
Ending Balance | 5,209 | 5,232
Communication Systems |  |
Changes in the carrying amount of goodwill |  |
Beginning Balance | 4,153 | 4,243
Goodwill decrease from divestitures | 0 | (9)
Decrease from reclassification to assets of businesses held for sale | 0 |
Impairment of goodwill | 0 | 0
Currency translation adjustments | 0 | (2)
Other (including adjustments to previously estimated fair value of assets acquired and liabilities assumed) |  | (82)
Ending Balance | 4,153 | 4,150
Aviation Systems |  |
Changes in the carrying amount of goodwill |  |
Beginning Balance | 2,992 | 4,859
Goodwill decrease from divestitures | (553) | (530)
Decrease from reclassification to assets of businesses held for sale | (11) |
Impairment of goodwill | (62) | (364)
Currency translation adjustments | (12) | 1
Other (including adjustments to previously estimated fair value of assets acquired and liabilities assumed) |  | (861)
Ending Balance | $ 2,354 | $ 3,105

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