Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018
Income Taxes
Remeasurement Deferred Tax Assets and Liabilities expense (benefit)		$ (18)		$ (952)
Foreign income, transition tax				$ 41
Unrecognized tax benefits	$ 436		$ 436		$ 423
Unrecognized tax benefits that would impact effective tax rate	275		275		262
Unrecognized tax benefits, interest and penalties accrued	$ 116		$ 116		110
Effective Income Tax Rate Reconciliation, Percent	20.00%	45.10%	22.60%	(48.60%)
Net Discrete Tax Benefit (Expense)	$ 12	$ (18)	$ 50	$ (12)
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	20		20
Patient Recovery Business
Income Taxes
Indemnification Receivable	24		24		21
Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Income Taxes
Disposal Group, Including Discontinued Operation, Provisional Tax Expense				$ 57
CareFusion [Member]
Income Taxes
Indemnification Receivable	$ 159		$ 159		$ 151