Restructuring, Impairment, and Related Charges - Summary of Restructuring Charges (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Restructuring Cost and Reserve [Line Items]
Severance and employee-related costs, net	$ 2	$ 14
Exit and other-related costs	21	40
Asset impairments and accelerated depreciation	0	104
Total	23	158
Operating Segments | U.S. Pharmaceutical
Restructuring Cost and Reserve [Line Items]
Severance and employee-related costs, net	3	2
Exit and other-related costs	1	2
Asset impairments and accelerated depreciation	0	8
Total	4	12
Operating Segments | Prescription Technology Solutions
Restructuring Cost and Reserve [Line Items]
Severance and employee-related costs, net	0	0
Exit and other-related costs	2	1
Asset impairments and accelerated depreciation	5	17
Total	7	18
Operating Segments | Medical-Surgical Solutions
Restructuring Cost and Reserve [Line Items]
Severance and employee-related costs, net	0	0
Exit and other-related costs	1	2
Asset impairments and accelerated depreciation	0	4
Total	1	6
Operating Segments | International
Restructuring Cost and Reserve [Line Items]
Severance and employee-related costs, net	0	12
Exit and other-related costs	2	14
Asset impairments and accelerated depreciation	0	34
Total	2	60
Corporate
Restructuring Cost and Reserve [Line Items]
Severance and employee-related costs, net	(1)	0
Exit and other-related costs	15	21
Asset impairments and accelerated depreciation	(5)	41
Total	$ 9	$ 62