Income Taxes (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Jun. 30, 2016
Income Taxes
Effective Income Tax Rate Reconciliation, Percent	34.00%	37.30%	35.60%	34.70%
Unrecognized tax benefits	$ 403,000,000		$ 403,000,000		$ 527,000,000
Unrecognized tax benefits that would impact effective tax rate	263,000,000		263,000,000		355,000,000
Unrecognized tax benefits, interest and penalties accrued	112,000,000		112,000,000		145,000,000
Amount CareFusion is liable under tax matters agreement in the event amount must be paid to the taxing authority	138,000,000		138,000,000		$ 172,000,000
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	$ 60,000,000		$ 60,000,000
Federal | Minimum
Income Taxes
Tax years open for examination	2006
Federal | Maximum
Income Taxes
Tax years open for examination	2016
State and Local | Minimum
Income Taxes
Tax years open for examination	2006
State and Local | Maximum
Income Taxes
Tax years open for examination	2016
Foreign | Minimum
Income Taxes
Tax years open for examination	2006
Foreign | Maximum
Income Taxes
Tax years open for examination	2016