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Restructuring, Impairment, and Related Charges - Summary of Restructuring Activity (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Restructuring Reserve [Roll Forward]
Beginning balance	$ 130
Restructuring, impairment, and related charges	23	$ 158
Non-cash charges	0
Cash payments	(22)
Other	(15)
Ending balance	116
Operating Segments | U.S. Pharmaceutical
Restructuring Reserve [Roll Forward]
Beginning balance	11
Restructuring, impairment, and related charges	4	12
Non-cash charges	0
Cash payments	(2)
Other	(1)
Ending balance	12
Operating Segments | Prescription Technology Solutions
Restructuring Reserve [Roll Forward]
Beginning balance	3
Restructuring, impairment, and related charges	7	18
Non-cash charges	(5)
Cash payments	(2)
Other	0
Ending balance	3
Operating Segments | Medical-Surgical Solutions
Restructuring Reserve [Roll Forward]
Beginning balance	1
Restructuring, impairment, and related charges	1	6
Non-cash charges	0
Cash payments	(1)
Other	0
Ending balance	1
Operating Segments | International
Restructuring Reserve [Roll Forward]
Beginning balance	56
Restructuring, impairment, and related charges	2	60
Non-cash charges	0
Cash payments	(2)
Other	(15)
Ending balance	41
Corporate
Restructuring Reserve [Roll Forward]
Beginning balance	59
Restructuring, impairment, and related charges	9	$ 62
Non-cash charges	5
Cash payments	(15)
Other	1
Ending balance	59
Other Current Liabilities
Restructuring Reserve [Roll Forward]
Beginning balance	58
Ending balance	62
Liabilities held for sale
Restructuring Reserve [Roll Forward]
Beginning balance	36
Ending balance	26
Other accrued liabilities, noncurrent
Restructuring Reserve [Roll Forward]
Beginning balance	36
Ending balance	$ 28

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- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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