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Income Taxes Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2023	Jun. 30, 2023	Jun. 30, 2022
Income Taxes
Income Tax Expense (Benefit)	$ 1	$ (97)
Effective Income Tax Rate Reconciliation, Percent	(0.70%)	26.30%
Unrecognized tax benefits	$ 940				$ 943
Unrecognized tax benefits that would impact effective tax rate	858
Unrecognized tax benefits, interest and penalties accrued	49				48
Goodwill impairment	154
Medical Unit Goodwill Impairment [Member] | Subsequent Event
Income Taxes
Income Tax Expense (Benefit)			$ 22
Medical
Income Taxes
Goodwill impairment	154
Forecast [Member] | Medical
Income Taxes
Income Tax Expense (Benefit)				$ (12)
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	$ 75
Federal | Minimum
Income Taxes
Open Tax Year	2016
Federal | Maximum
Income Taxes
Open Tax Year	2023
CareFusion [Member]
Income Taxes
Indemnification receivable	$ 77				$ 75

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