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Condensed Consolidated Financial Statement Details - Intangible Assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	$ 12,414		$ 12,414
Amortization expense of intangible assets	598		1,193	$ 1,192
Trademarks and Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	$ 344		$ 344
Amortization expense of intangible assets		$ 594

X

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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

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