Comprehensive Loss - Schedule of Accumulated Other Comprehensive Loss (Detail) $ in Millions	3 Months Ended
	Dec. 31, 2015 USD ($)
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	$ 239
Ending balance	239
Foreign Currency Translation Loss
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(157)
Other comprehensive loss	(24)	[1]
Ending balance	(181)
Minimum Pension Liability Adjustment
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(10)
Ending balance	(10)
(Losses) On Derivative Financial Instruments
Accumulated Other Comprehensive Income Loss [Line Items]
Other comprehensive loss	(1)	[1]
Ending balance	(1)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(167)
Other comprehensive loss	(25)	[1]
Ending balance	$ (192)

[1] Foreign currency translation adjustments include intra-entity foreign currency transactions that are of a long-term investment nature of $23.4 million