Goodwill, Customer Relationships and Other Intangible Assets - Goodwill Activity (Details) $ in Millions	3 Months Ended
Mar. 31, 2022 USD ($)
Goodwill [Roll Forward]
As of December 31, 2020	$ 6,666
Effect of foreign currency exchange rate changes	(11)
As of March 31, 2022	6,655
Goodwill, accumulated impairment loss	$ 3,600

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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