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Income Taxes Narrative (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2022	Jun. 30, 2021
Income Taxes
Income Tax Expense (Benefit)	$ (97)	$ 410
Effective Income Tax Rate Reconciliation, Percent	26.30%	61.80%
Unrecognized tax benefits	$ 931			$ 932
Unrecognized tax benefits that would impact effective tax rate	848			849
Unrecognized tax benefits, interest and penalties accrued	51			49
Cordis Divestiture [Member]
Income Taxes
Discontinued Operation, Tax Effect of Discontinued Operation	9
Forecast [Member] | Cordis Divestiture [Member]
Income Taxes
Discontinued Operation, Tax Effect of Discontinued Operation			$ 38
Minimum
Income Taxes
Estimated range of decrease in unrecognized tax benefits within the next 12 months	0
Maximum
Income Taxes
Estimated range of decrease in unrecognized tax benefits within the next 12 months	$ 20
Federal | Minimum
Income Taxes
Open Tax Year	2015
Federal | Maximum
Income Taxes
Open Tax Year	2020
Total Opioid Litigation [Member]
Income Taxes
Income Tax Expense (Benefit)		$ (450)		(228)
Unrecognized tax benefits		34		219
Litigation Charges		$ 1,020
CareFusion [Member]
Income Taxes
Indemnification receivable	$ 72			72
Patient Recovery Business [Member]
Income Taxes
Indemnification receivable	$ 12			$ 12

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