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Intangible Assets - Schedule of Intangible Assets by Class (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 20,540	$ 4,424
Accumulated Amortization	2,803	2,281
Net Book Value	17,737	2,143
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	16,220	2,642
Accumulated Amortization	1,680	1,294
Net Book Value	14,540	1,348
Acquired software and technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,227	591
Accumulated Amortization	556	490
Net Book Value	1,671	101
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	586	120
Accumulated Amortization	75	71
Net Book Value	511	49
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	950	810
Accumulated Amortization	355	314
Net Book Value	595	496
Purchased software
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	557	261
Accumulated Amortization	137	112
Net Book Value	$ 420	$ 149

X

- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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-Section 50
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
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