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