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Goodwill and Intangible Assets - Acquired Intangible Assets (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Acquired intangible assets disclosures |  |
Total gross carrying amount | $ 8,172 | $ 8,213
Total accumulated amortization | (3,130) | (3,036)
Total finite-lived intangible assets - net | 5,042 | 5,177
Non-amortizable intangible assets (primarily tradenames) | 655 | 658
Total intangible assets - net | $ 5,697 | 5,835
Minimum |  |
Acquired intangible assets disclosures |  |
Indefinite lived tradenames years in existence | 60 years |
Customer related intangible assets |  |
Acquired intangible assets disclosures |  |
Total gross carrying amount | $ 4,266 | 4,280
Total accumulated amortization | (1,473) | (1,422)
Patents |  |
Acquired intangible assets disclosures |  |
Total gross carrying amount | 517 | 537
Total accumulated amortization | (495) | (512)
Other technology-based intangible assets |  |
Acquired intangible assets disclosures |  |
Total gross carrying amount | 2,113 | 2,114
Total accumulated amortization | (687) | (638)
Definite-lived tradenames |  |
Acquired intangible assets disclosures |  |
Total gross carrying amount | 1,172 | 1,178
Total accumulated amortization | (397) | (385)
Other amortizable intangible assets |  |
Acquired intangible assets disclosures |  |
Total gross carrying amount | 104 | 104
Total accumulated amortization | $ (78) | $ (79)

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