Income Taxes (Narrative) (Details) - USD ($) $ in Millions		12 Months Ended
	Jun. 28, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Income Taxes
Effective Income Tax Rate Reconciliation, Percent		213.80%	32.70%	37.10%
Provision at Federal statutory rate		28.10%	35.00%	35.00%
Provisional net tax benefit related to Tax Act		$ 977
Undistributed earnings from non-U.S. subsidiaries		110
Provisional Tax Expense on Repatriated Undistributed Earnings of Foreign Subsidiaries		41
Federal	$ 163	1,003	$ (258)	$ (96)
Deferred Tax Assets, Valuation Allowance	$ 72
Deferred tax assets on tax credit carryforwards		526	378
Valuation allowance on operating loss carryforwards		379
Unrecognized tax benefits that would impact effective tax rate		262	268	355
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions		141	23	42
Unrecognized tax benefits		423	417	527	$ 542
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities		99	154	30
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations		11	0	1
Unrecognized tax benefits, interest and penalties accrued		110	99	145
Unrecognized tax benefits, interest and penalties		8	12	$ 9
Amount CareFusion is liable under tax matters agreement in the event amount must be paid to the taxing authority		151	$ 142
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		35
Federal
Income Taxes
Tax credit carryforwards		794
State and Local
Income Taxes
Tax credit carryforwards		2,026
Foreign
Income Taxes
Tax credit carryforwards		1,149
Patient Recovery Business [Member]
Income Taxes
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions		110
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities		81
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations		11
Business Combination, Indemnification Assets, Amount as of Acquisition Date		$ 21