Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2018
Income Taxes
Remeasurement Deferred Tax Assets and Liabilities expense (benefit)		$ (935)		$ (935)
Foreign income, transition tax		$ 41		$ 41
Unrecognized tax benefits	$ 496		$ 496		$ 423
Unrecognized tax benefits that would impact effective tax rate	333		333		262
Unrecognized tax benefits, interest and penalties accrued	$ 116		$ 116		110
Effective Income Tax Rate Reconciliation, Percent	31.00%	(231.90%)	23.50%	(136.60%)
Net Discrete Tax Benefit			$ 38
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	35		35
Patient Recovery Business
Income Taxes
Indemnification Receivable	23		23		21
Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Income Taxes
Disposal Group, Including Discontinued Operation, Provisional Tax Expense		$ 57		$ 57
CareFusion [Member]
Income Taxes
Indemnification Receivable	$ 156		$ 156		$ 151