Acquisitions & Divestitures - Divestitures (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($) item	Jan. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Divestitures
Consideration		$ 1,065
Assets	$ 133,275		$ 132,001
Goodwill	56,106		55,643	$ 53,765
Intangible assets-net	12,312		12,511
Property, plant, and equipment-net	5,559		5,694
Liabilities	114,162		$ 113,005
Held-for-sale
Divestitures
Assets	727
Goodwill	484
Intangible assets-net	165
Property, plant, and equipment-net	45
Liabilities	$ 123
Infrastructure
Divestitures
Number of divestitures | item	1