Goodwill and other intangible assets (Goodwill Roll Forward) (Details) $ in Millions	3 Months Ended
Mar. 31, 2022 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 14,890
Net increase in goodwill	22
Currency translation adjustment	(15)
Ending balance	$ 14,897

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 210
-Section S99
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-Subparagraph (SX 210.9-03(10)(1))
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
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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 increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

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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No definition available.

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