Income Taxes - Provision for Income Taxes from Continuing Operations (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]
Federal	$ 225	$ 177	$ 164
State and local, including Puerto Rico	(11)	(4)	10
Foreign	217	179	241
Total, Current	431	352	415
Domestic	(59)	(119)	(29)
Foreign	(35)	3	(23)
Total, Deferred	(94)	(116)	(52)
Total	$ 337	$ 236	$ 363

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.