Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Jun. 30, 2016
Income Taxes
Effective Income Tax Rate Reconciliation, Percent	32.30%	36.90%	34.40%	35.50%
Unrecognized tax benefits	$ 394		$ 394
Unrecognized tax benefits that would impact effective tax rate	258		258		$ 355
Unrecognized tax benefits, interest and penalties accrued	105		105		145
Amount CareFusion is liable under tax matters agreement in the event amount must be paid to the taxing authority	140		140		$ 172
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	$ 45		$ 45
Federal | Minimum
Income Taxes
Closed Tax Year	2006
Tax years open for examination	2008
Federal | Maximum
Income Taxes
Closed Tax Year	2007
Tax years open for examination	2016
State and Local | Minimum
Income Taxes
Tax years open for examination	2008
State and Local | Maximum
Income Taxes
Tax years open for examination	2016
Foreign | Minimum
Income Taxes
Tax years open for examination	2008
Foreign | Maximum
Income Taxes
Tax years open for examination	2016