Restructuring - Restructuring Activities and Related Reserves (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		13 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015
Restructuring Cost and Reserve [Line Items]
Reserve balance	$ 13		$ 19
Charges	2	$ 4	14	$ 24
Costs charged against assets / liabilities			(1)
Cash paid	(5)		(20)		$ (19)
Foreign currency translation adjustment			(2)
Reserve balance	10		10		10
Severance and Employee Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Reserve balance	9		16
Charges	2		7
Cash paid	(5)		(15)
Foreign currency translation adjustment			(2)
Reserve balance	6		6		6
Environmental Remediation [Member]
Restructuring Cost and Reserve [Line Items]
Reserve balance	3		2
Charges			1
Reserve balance	3		3		3
Asset Impairment and Accelerated Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Charges			1
Costs charged against assets / liabilities			(1)
Other [Member]
Restructuring Cost and Reserve [Line Items]
Reserve balance	1		1
Charges			5
Cash paid			(5)
Reserve balance	$ 1		$ 1		$ 1