Goodwill and Intangible Assets - Changes in Goodwill for Each Reportable Segment (Detail) $ in Millions	3 Months Ended
	Dec. 31, 2016 USD ($)
Goodwill [Line Items]
Beginning balance	$ 1,627
Acquisitions	2
Other adjustments	(17)	[1]
Ending balance	1,612
Recorded Music
Goodwill [Line Items]
Beginning balance	1,163
Acquisitions	2
Other adjustments	(17)	[1]
Ending balance	1,148
Music Publishing
Goodwill [Line Items]
Beginning balance	464
Ending balance	$ 464

[1] Other adjustments during the three months ended December 31, 2016 represent foreign currency movements.