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Intangible Assets - Schedule of Intangible Assets by Major Class (Detail) - USD ($) $ in Millions | Mar. 31, 2021 | Dec. 31, 2020
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Finite Lived Intangible Assets [Line Items] |  |
Gross Book Value | $ 5,303 | $ 5,283
Accumulated Amortization | 1,906 | 1,828
Net Book Value | 3,397 | 3,455
Customer Relationships |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Book Value | 1,743 | 1,744
Accumulated Amortization | 507 | 485
Net Book Value | 1,236 | 1,259
Technology/Technical Know-How |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Book Value | 1,284 | 1,284
Accumulated Amortization | 514 | 488
Net Book Value | 770 | 796
Tradenames |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Book Value | 767 | 767
Accumulated Amortization | 174 | 166
Net Book Value | 593 | 601
Other |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Book Value | 1,509 | 1,488
Accumulated Amortization | 711 | 689
Net Book Value | $ 798 | $ 799

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