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

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Goodwill and Intangible Assets Intangible Asset Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Net of Accumulated Amortization of $289 at September 30, 2021 and $173 at December 31, 2020	$ 695		$ 695		$ 810
Amortization of intangible assets	39	$ 38	117	$ 124
Accumulated amortization	289		289		173
Intangible Assets				$ 159
Developed and Acquired Technology, Net of Accumulated Amortization of $218 at September 30, 2021 and $132 at December 31, 2020
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	218		218		132
Trade Names, Net of Accumulated Amortization of $71 at September 30, 2021 and $41 at December 31, 2020
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ 71		$ 71		$ 41