Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jun. 30, 2015	Sep. 30, 2014	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Postemployment benefit costs	$ 10		$ 12	$ 31	$ 35
Charge associated with workforce reduction actions		$ 36
Workforce reduction costs remaining liability	9			9
Change in estimate	5			5
CareFusion [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee termination costs	75			136
CareFusion [Member] | Employee Severance [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee termination costs	$ 53			$ 87