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Intangible Assets - Schedule of Intangible Assets by Major Class (Detail) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
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

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 926
-SubTopic 20
-Section 50
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