Income Taxes - Significant Components of Company's Net Deferred Tax Assets/(Liabilities) (Detail) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
Deferred tax assets:
Allowances and reserves	$ 34	$ 40
Employee benefits and compensation	47	47
Other accruals	82	76
Tax attribute carry forwards	475	552
Other	3	2
Total deferred tax assets	641	717
Valuation allowance	(310)	(344)
Net deferred tax assets	331	373
Deferred tax liabilities:
Depreciation, amortization and artist advances	(26)	(23)
Intangible assets	(572)	(650)
Total deferred tax liabilities	(598)	(673)
Net deferred tax liabilities	$ (267)	$ (300)