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Intangible Assets - Schedule of Intangible Assets by Class (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 20,746	$ 21,036
Accumulated Amortization	3,742	3,394
Net Book Value	17,004	17,642
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	15,788	16,187
Accumulated Amortization	2,461	2,145
Net Book Value	13,327	14,042
Acquired software and technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,534	2,607
Accumulated Amortization	651	639
Net Book Value	1,883	1,968
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	609	620
Accumulated Amortization	118	105
Net Book Value	491	515
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	995	942
Accumulated Amortization	323	332
Net Book Value	672	610
Purchased software
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	820	680
Accumulated Amortization	189	173
Net Book Value	$ 631	$ 507

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
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
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-Section 50
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