Acquisitions/Divestitures (Details) $ / shares in Units, $ in Billions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jul. 09, 2019
USD ($)
$ / shares
|
Jun. 30, 2020
item
|
Mar. 31, 2020
item
|
Jun. 30, 2020
item
|
|
| Acquisitions | ||||
| Percentage of business acquired (as a percent) | 100.00% | 100.00% | ||
| Red Hat, Inc. | ||||
| Acquisitions | ||||
| Percentage of business acquired (as a percent) | 100.00% | |||
| Cash paid to acquiree shareholders (in dollars per share) | $ / shares | $ 190 | |||
| Aggregate acquisitions cost | $ 35 | |||
| Businesses acquired, cash consideration | $ 34 | |||
| Cloud & Cognitive Software | ||||
| Acquisitions | ||||
| Number of acquisitions | item | 1 | 1 | 2 | |