Share-Based Compensation and Savings Plans (Summary of Share-Based Payment Awards Outstanding) (Details) In Millions, unless otherwise specified	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	21	23	24
Current and Former Cardinal Health Employees | Cardinal Health
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	20
Current and Former Cardinal Health Employees | CareFusion
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	5
CareFusion | Cardinal Health
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	1