Revenue Recognition - Hybrid Cloud Revenue by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue by Major Products/Service Offerings
Hybrid cloud revenue	$ 5,176	$ 4,655	$ 16,049	$ 14,024
Software
Revenue by Major Products/Service Offerings
Hybrid cloud revenue	2,186	2,038	6,604	5,797
Consulting
Revenue by Major Products/Service Offerings
Hybrid cloud revenue	2,221	1,982	6,642	5,605
Infrastructure
Revenue by Major Products/Service Offerings
Hybrid cloud revenue	768	558	2,661	2,376
Other.
Revenue by Major Products/Service Offerings
Hybrid cloud revenue	$ 2	$ 77	$ 143	$ 246