Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended		12 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Taxes
Effective Income Tax Rate Reconciliation, Percent		36.30%	(916.50%)	36.70%	(44.40%)
Goodwill impairment				$ 863
Income Tax Expense (Benefit)		$ 197	$ 1,253	189	$ 328
Unrecognized tax benefits		1,100		1,100			$ 943
Unrecognized tax benefits that would impact effective tax rate		897		897			858
Unrecognized tax benefits, interest and penalties accrued		61		61			48
Medical Unit
Income Taxes
Goodwill impairment				863
Medical Unit Goodwill Impairment [Member]
Income Taxes
Income Tax Expense (Benefit)		74
Forecast [Member] | Medical Unit Goodwill Impairment [Member]
Income Taxes
Income Tax Expense (Benefit)						$ (68)
Forecast [Member] | Medical Unit Goodwill Impairment [Member] | Subsequent Event
Income Taxes
Income Tax Expense (Benefit)	$ 66
Minimum
Income Taxes
Estimated range of decrease in unrecognized tax benefits within the next 12 months		0		0
Maximum
Income Taxes
Estimated range of decrease in unrecognized tax benefits within the next 12 months		125		125
CareFusion [Member]
Income Taxes
Indemnification Receivable		$ 80		$ 80			$ 75