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Restructuring, Impairment, and Related Charges, Net - Schedule of Restructuring Reserve by Type of Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Restructuring Reserve [Roll Forward]
Beginning balance	$ 126
Restructuring, impairment, and related charges, net	47	$ 10
Non-cash charges	(2)
Cash payments	(83)
Ending balance	88
Restructuring liabilities	88
Operating Segments | U.S. Pharmaceutical
Restructuring Reserve [Roll Forward]
Beginning balance	10
Restructuring, impairment, and related charges, net	1	1
Non-cash charges	0
Cash payments	(2)
Ending balance	9
Restructuring liabilities	9
Operating Segments | Prescription Technology Solutions
Restructuring Reserve [Roll Forward]
Beginning balance	1
Restructuring, impairment, and related charges, net	0	4
Non-cash charges	0
Cash payments	0
Ending balance	1
Restructuring liabilities	1
Operating Segments | Medical-Surgical Solutions
Restructuring Reserve [Roll Forward]
Beginning balance	90
Restructuring, impairment, and related charges, net	17	3
Non-cash charges	0
Cash payments	(50)
Ending balance	57
Restructuring liabilities	57
Operating Segments | International
Restructuring Reserve [Roll Forward]
Beginning balance	1
Restructuring, impairment, and related charges, net	0	1
Non-cash charges	0
Cash payments	0
Ending balance	1
Restructuring liabilities	1
Corporate
Restructuring Reserve [Roll Forward]
Beginning balance	24
Restructuring, impairment, and related charges, net	29	$ 1
Non-cash charges	(2)
Cash payments	(31)
Ending balance	20
Restructuring liabilities	20
Accrued Liabilities
Restructuring Reserve [Roll Forward]
Beginning balance	103
Ending balance	68
Restructuring liabilities	68
Other Non-Current Liabilities
Restructuring Reserve [Roll Forward]
Beginning balance	23
Ending balance	20
Restructuring liabilities	$ 20

X

- 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.

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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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