Revenue Recognition - Hybrid Cloud Revenue by Segment (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Revenue by Major Products/Service Offerings | |||
| Hybrid cloud revenue | $ 20,210 | $ 16,838 | $ 13,834 |
| Software | |||
| Revenue by Major Products/Service Offerings | |||
| Hybrid cloud revenue | 8,713 | 6,907 | 4,099 |
| Consulting | |||
| Revenue by Major Products/Service Offerings | |||
| Hybrid cloud revenue | 7,852 | 5,861 | 5,274 |
| Infrastructure | |||
| Revenue by Major Products/Service Offerings | |||
| Hybrid cloud revenue | $ 3,645 | 4,039 | 4,183 |
| Other - divested businesses | |||
| Revenue by Major Products/Service Offerings | |||
| Hybrid cloud revenue | $ 32 | $ 279 | |