Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2009
Undistributed Earnings of Foreign Subsidiaries That May Be Subject to Repatriation	$ 2,200
Undistributed Earnings of Foreign Subsidiaries	1,500
Income Tax Reconcilation, Repatriation of Foreign Earnings			168
Aggregate tax credit carryforward, deferred tax asset	120
Tax credit carryforward, valuation allowance	74
Unrecognized tax benefits	654	747	731	849
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	337	332	311
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	209	267	233
Interest and penalties recognized	(28)	36	35
Additional tax proposed in notices	849
Amount CareFusion is liable under tax matters agreement in the event amount must be paid to the taxing authority	592
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Lower Bound	0
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Upper Bound	275
Federal
Tax credit carryforward, amount	37
State
Tax credit carryforward, amount	523
International
Tax credit carryforward, amount	$ 135