Segment Information - Schedule of Segment Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Revenues	$ 849	$ 829
OIBDA	137	102
Depreciation of property, plant and equipment	(13)	(14)
Amortization of intangible assets	(62)	(65)
Operating income	62	23
Operating Segments | Recorded Music
Segment Reporting Information [Line Items]
Revenues	737	714
OIBDA	152	111
Depreciation of property, plant and equipment	(8)	(10)
Amortization of intangible assets	(46)	(49)
Operating income	98	52
Operating Segments | Music Publishing
Segment Reporting Information [Line Items]
Revenues	116	119
OIBDA	5	17
Depreciation of property, plant and equipment	(2)	(1)
Amortization of intangible assets	(16)	(16)
Operating income	(13)
Corporate Expenses and Eliminations
Segment Reporting Information [Line Items]
Revenues	(4)	(4)
OIBDA	(20)	(26)
Depreciation of property, plant and equipment	(3)	(3)
Operating income	$ (23)	$ (29)