Goodwill and Intangible Assets - Changes in Goodwill for Each Reportable Segment (Detail) $ in Millions	9 Months Ended
	Jun. 30, 2019 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 1,692
Acquisitions	89	[1]
Divestitures	0
Other adjustments	(9)	[2]
Ending balance	1,772
Recorded Music
Goodwill [Roll Forward]
Beginning balance	1,228
Acquisitions	89	[1]
Divestitures	0
Other adjustments	(9)	[2]
Ending balance	1,308
Music Publishing
Goodwill [Roll Forward]
Beginning balance	464
Acquisitions	0
Divestitures	0
Other adjustments	0
Ending balance	$ 464

[1] Relates to the acquisition of EMP during the nine months ended June 30, 2019.

[2] Other adjustments during the nine months ended June 30, 2019 represent foreign currency movements.