Acquisitions & Divestitures - Pro forma information (Details) - Red Hat, Inc. - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Acquisitions
Revenue	$ 79,628	$ 81,360
Net income	$ 9,723	$ 5,702

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
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-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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