Goodwill and Other Intangible Assets (Schedule of Goodwill by Reportable Segment) (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended		12 Months Ended
	Mar. 31, 2024	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Mar. 31, 2024	Mar. 31, 2023	Jun. 30, 2023
Goodwill [Roll Forward]
Beginning balance		$ 4,609			$ 4,609
Goodwill acquired, net of purchase price adjustments					853
Foreign currency translation adjustments and other					3
Goodwill impairment					671
Ending balance	$ 4,788				4,788		$ 4,609
OptiFreight Logistics [Member]
Goodwill [Roll Forward]
Ending balance	48				48
Pharmaceutical and Specialty Solutions
Goodwill [Roll Forward]
Beginning balance		2,762			2,762
Goodwill acquired, net of purchase price adjustments					856
Foreign currency translation adjustments and other					0
Goodwill impairment					0
Ending balance	3,618				3,618		2,762
Goodwill, Transfers							110
Global Medical Products and Distribution
Goodwill [Roll Forward]
Beginning balance		677			677
Goodwill acquired, net of purchase price adjustments					(3)
Foreign currency translation adjustments and other					3
Goodwill impairment	90	581	$ 709	$ 154	671	$ 863
Ending balance	0				0		677
Goodwill, Impaired, Accumulated Impairment Loss	5,400				5,400		4,700
Other Segments
Goodwill [Roll Forward]
Beginning balance		$ 1,170			1,170
Goodwill acquired, net of purchase price adjustments					0
Foreign currency translation adjustments and other					0
Goodwill impairment					0
Ending balance	1,170				1,170		1,170
Goodwill, Transfers							$ (110)
Other Segments | OptiFreight Logistics [Member]
Goodwill [Roll Forward]
Ending balance	$ 48				$ 48