Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Revenue		$ 1,058	$ 958	$ 3,351	$ 2,966
Costs and expenses:
Cost of revenue		(577)	(531)	(1,762)	(1,588)
Selling, general and administrative expenses	[1]	(372)	(343)	(1,102)	(1,013)
Amortization expense		(51)	(56)	(160)	(164)
Total costs and expenses		(1,000)	(930)	(3,024)	(2,765)
Operating income		58	28	327	201
Loss on extinguishment of debt		(4)	(7)	(7)	(31)
Interest expense, net		(36)	(33)	(108)	(105)
Other (expense) income, net		(16)	394	41	392
Income before income taxes		2	382	253	457
Income tax benefit (expense)		12	(61)	(86)	(132)
Net income		14	321	167	325
Less: Income attributable to noncontrolling interest		(1)	(1)	(1)	(4)
Net income attributable to Warner Music Group Corp.		$ 13	$ 320	$ 166	$ 321

[1] (a) Includes depreciation expense of:$(15) $(15) $(43) $(41)