Consolidated Statement of Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Total Warner Music Group Corp. Equity	Noncontrolling Interest
Beginning balance at Sep. 30, 2013	$ 743		$ 1,128	$ (341)	$ (61)	$ 726	$ 17
Beginning balance, shares at Sep. 30, 2013		1,055
Net (loss) income	(303)			(308)		(308)	5
Other comprehensive loss, net of tax	(47)				(47)	(47)
Distribution to noncontrolling interest holders	(3)						(3)
Ending balance at Sep. 30, 2014	390		1,128	(649)	(108)	371	19
Ending balance, shares at Sep. 30, 2014		1,055
Net (loss) income	(88)			(91)		(91)	3
Other comprehensive loss, net of tax	(59)				(59)	(59)
Distribution to noncontrolling interest holders	(4)						(4)
Ending balance at Sep. 30, 2015	$ 239		1,128	(740)	(167)	221	18
Ending balance, shares at Sep. 30, 2015	1,055	1,055
Net (loss) income	$ 30			25		25	5
Other comprehensive loss, net of tax	(51)				(51)	(51)
Disposal of noncontrolling interest related to divestiture	(3)						(3)
Distribution to noncontrolling interest holders	(5)						(5)
Ending balance at Sep. 30, 2016	$ 210		$ 1,128	$ (715)	$ (218)	$ 195	$ 15
Ending balance, shares at Sep. 30, 2016	1,055	1,055