Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions		3 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Revenue		$ 1,256	$ 1,203
Costs and expenses:
Cost of revenue		(665)	(626)
Selling, general and administrative expenses	[1]	(379)	(376)
Amortization expense		(47)	(54)
Total costs and expenses		(1,091)	(1,056)
Operating income		165	147
Loss on extinguishment of debt		0	(3)
Interest expense, net		(33)	(36)
Other (expense) income		(5)	28
Income before income taxes		127	136
Income tax expense		(5)	(50)
Net income		122	86
Less: Income attributable to noncontrolling interest		(2)	0
Net income attributable to Warner Music Group Corp.		$ 120	$ 86

[1] (a) Includes depreciation expense:$(24) $(14)